mirrors/woodpecker
1
0
Fork 0
mirror of https://github.com/woodpecker-ci/woodpecker.git synced 2024-12-21 07:56:31 +00:00
Code Issues Projects Releases Wiki Activity

Add SSH backend (#861)

Browse source 
Add SSH backend that runs commands via SSH.

Close #848
This commit is contained in:
qwerty287 2022-04-29 12:30:50 +02:00 committed by GitHub
parent e3be87af1e
commit 9c6c4559a7
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
146 changed files with 29017 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
docs/docs/30-administration/15-agent-config.md
View file

@ -153,4 +153,8 @@ Configures if the gRPC server certificate should be verified, only valid when `W
### `WOODPECKER_BACKEND`
> Default: `auto-detect`
Configures the backend engine to run pipelines on. Possible values are `auto-detect`, `docker`, or `local`.
Configures the backend engine to run pipelines on. Possible values are `auto-detect`, `docker`, `local` or `ssh`.
### `WOODPECKER_BACKEND_SSH_*`
See [SSH backend configuration](backends/ssh/#configuration)

6
docs/docs/30-administration/22-backends/20-local.md
View file

@ -1,6 +1,12 @@
# Local backend
:::danger
The local backend will execute the pipelines on the local system without any isolation of any kind.
:::
:::note
This backend is still pretty new and can not be treated as stable. Its implementation and configuration can change at any time.
:::
Since the code run directly in the same context as the agent (same user, same filesystem), a malicious pipeline could
be used to access the agent configuration especially the `WOODPECKER_AGENT_SECRET` variable.

41
docs/docs/30-administration/22-backends/30-ssh.md Normal file
View file

@ -0,0 +1,41 @@
# SSH backend
:::danger
The SSH backend will execute the pipelines using SSH on a remote system without any isolation of any kind.
:::
:::note
This backend is still pretty new and can not be treated as stable. Its implementation and configuration can change at any time.
:::
Since the code run directly on the SSH machine, a malicious pipeline could access and edit files the SSH user has access to and execute every command the remote user is allowed to use. Always restrict the user as far as possible!
It is recommended to use this backend only for private setups where the code and pipelines can be trusted. You shouldn't use it for a public facing CI where anyone can submit code or add new repositories.
The backend will use a random directory in $TMPDIR to store the clone code and execute commands.
## Configuration
### `WOODPECKER_BACKEND_SSH_ADDRESS`
> Default: empty
The SSH host to run steps with `ssh` backend.
### `WOODPECKER_BACKEND_SSH_USER`
> Default: empty
The SSH user to run steps with `ssh` backend.
### `WOODPECKER_BACKEND_SSH_KEY`
> Default: empty
Path to the private SSH key to run steps with `ssh` backend.
### `WOODPECKER_BACKEND_SSH_KEY_PASSWORD`
> Default: empty
The password for the private key to run steps with `ssh` backend.
### `WOODPECKER_BACKEND_SSH_PASSWORD`
> Default empty
The SSH password to run steps with `ssh` backend.

1
go.mod
View file

@ -29,6 +29,7 @@ require (
github.com/joho/godotenv v1.4.0
github.com/lib/pq v1.10.4
github.com/mattn/go-sqlite3 v1.14.11
github.com/melbahja/goph v1.3.0
github.com/moby/moby v20.10.12+incompatible
github.com/moby/term v0.0.0-20210619224110-3f7ff695adc6
github.com/morikuni/aec v1.0.0 // indirect

9
go.sum
View file

@ -868,6 +868,7 @@ github.com/klauspost/compress v1.13.5/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47e
github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/kr/fs v0.1.0 h1:Jskdu9ieNAYnjxsi0LbQp1ulIKZV1LAFgK1tWhpZgl8=
github.com/kr/fs v0.1.0/go.mod h1:FFnZGqtBN9Gxj7eW1uZ42v5BccTP0vu6NEaFoC2HwRg=
github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
@ -962,6 +963,8 @@ github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182aff
github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
github.com/mbilski/exhaustivestruct v1.2.0 h1:wCBmUnSYufAHO6J4AVWY6ff+oxWxsVFrwgOdMUQePUo=
github.com/mbilski/exhaustivestruct v1.2.0/go.mod h1:OeTBVxQWoEmB2J2JCHmXWPJ0aksxSUOUy+nvtVEfzXc=
github.com/melbahja/goph v1.3.0 h1:RAIS7eL2tew/UrNmBpY2NZMxw6fWtOxki9nkrzw8mZY=
github.com/melbahja/goph v1.3.0/go.mod h1:04M6J+mKmwzAOWhO0ABTweHGU3cizOp90WdCoxrn9gQ=
github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 h1:zpIH83+oKzcpryru8ceC6BxnoG8TBrhgAvRg8obzup0=
github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517/go.mod h1:KQ7+USdGKfpPjXk4Ga+5XxQM4Lm4e3gAogrreFAYpOg=
github.com/mgechev/revive v1.1.4 h1:sZOjY6GU35Kr9jKa/wsKSHgrFz8eASIB5i3tqWZMp0A=
@ -1137,6 +1140,8 @@ github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pkg/profile v1.2.1/go.mod h1:hJw3o1OdXxsrSjjVksARp5W95eeEaEfptyVZyv6JUPA=
github.com/pkg/sftp v1.10.1/go.mod h1:lYOWFsE0bwd1+KfKJaKeuokY15vzFx25BLbzYYoAxZI=
github.com/pkg/sftp v1.13.4 h1:Lb0RYJCmgUcBgZosfoi9Y9sbl6+LJgOIgk/2Y4YjMFg=
github.com/pkg/sftp v1.13.4/go.mod h1:LzqnAvaD5TWeNBsZpfKxSYn1MbjWwOsCIAFFJbpIsK8=
github.com/pmezard/go-difflib v0.0.0-20151028094244-d8ed2627bdf0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
@ -1499,10 +1504,12 @@ golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0/go.mod h1:LzIPMQfyMNhhGPh
golang.org/x/crypto v0.0.0-20201203163018-be400aefbc4c/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20211215165025-cf75a172585e/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
golang.org/x/crypto v0.0.0-20220112180741-5e0467b6c7ce/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/crypto v0.0.0-20220214200702-86341886e292 h1:f+lwQ+GtmgoY+A2YaQxlSOnDjXcQ7ZRLWOHbC6HtRqE=
@ -1736,6 +1743,7 @@ golang.org/x/sys v0.0.0-20210324051608-47abb6519492/go.mod h1:h1NjWce9XRLGQEsW7w
golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210403161142-5e06dd20ab57/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210423185535-09eb48e85fd7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210426230700-d19ff857e887/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210514084401-e8d321eab015/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@ -1754,6 +1762,7 @@ golang.org/x/sys v0.0.0-20210915083310-ed5796bab164/go.mod h1:oPkhp1MJrh7nUepCBc
golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211019181941-9d821ace8654/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211031064116-611d5d643895/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211105183446-c75c47738b0c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211124211545-fe61309f8881/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211205182925-97ca703d548d/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

2
pipeline/backend/backend.go
View file

@ -5,6 +5,7 @@ import (
"github.com/woodpecker-ci/woodpecker/pipeline/backend/docker"
"github.com/woodpecker-ci/woodpecker/pipeline/backend/local"
"github.com/woodpecker-ci/woodpecker/pipeline/backend/ssh"
"github.com/woodpecker-ci/woodpecker/pipeline/backend/types"
)
@ -14,6 +15,7 @@ func init() {
loadedEngines := []types.Engine{
docker.New(),
local.New(),
ssh.New(),
// kubernetes.New(), // TODO: disabled for now as kubernetes backend has not been implemented yet
}

153
pipeline/backend/ssh/ssh.go Normal file
View file

@ -0,0 +1,153 @@
package ssh
import (
"context"
"encoding/base64"
"fmt"
"io"
"os"
"strings"
"github.com/melbahja/goph"
"github.com/woodpecker-ci/woodpecker/pipeline/backend/types"
"github.com/woodpecker-ci/woodpecker/shared/constant"
)
type ssh struct {
cmd *goph.Cmd
output io.ReadCloser
client *goph.Client
workingdir string
}
type readCloser struct {
io.Reader
}
func (c readCloser) Close() error {
return nil
}
// make sure local implements Engine
var _ types.Engine = &ssh{}
// New returns a new ssh Engine.
func New() types.Engine {
return &ssh{}
}
func (e *ssh) Name() string {
return "ssh"
}
func (e *ssh) IsAvailable() bool {
return os.Getenv("WOODPECKER_BACKEND_SSH_KEY") != "" || os.Getenv("WOODPECKER_BACKEND_SSH_PASSWORD") != ""
}
func (e *ssh) Load() error {
cmd, err := e.client.Command("/bin/env", "mktemp", "-d", "-p", "/tmp", "woodpecker-ssh-XXXXXXXXXX")
if err != nil {
return err
}
dir, err := cmd.Output()
if err != nil {
return err
}
e.workingdir = string(dir)
address := os.Getenv("WOODPECKER_BACKEND_SSH_ADDRESS")
if address == "" {
return fmt.Errorf("missing SSH address")
}
user := os.Getenv("WOODPECKER_BACKEND_SSH_USER")
if user == "" {
return fmt.Errorf("missing SSH user")
}
var auth goph.Auth
if file, has := os.LookupEnv("WOODPECKER_BACKEND_SSH_KEY"); has {
var err error
auth, err = goph.Key(file, os.Getenv("WOODPECKER_BACKEND_SSH_KEY_PASSWORD"))
if err != nil {
return err
}
} else {
auth = goph.Password(os.Getenv("WOODPECKER_BACKEND_SSH_PASSWORD"))
}
client, err := goph.New(user, address, auth)
if err != nil {
return err
}
e.client = client
return nil
}
// Setup the pipeline environment.
func (e *ssh) Setup(ctx context.Context, proc *types.Config) error {
return nil
}
// Exec the pipeline step.
func (e *ssh) Exec(ctx context.Context, proc *types.Step) error {
// Get environment variables
Command := []string{}
for a, b := range proc.Environment {
if a != "HOME" && a != "SHELL" { // Don't override $HOME and $SHELL
Command = append(Command, a+"="+b)
}
}
if proc.Image == constant.DefaultCloneImage {
// Default clone step
Command = append(Command, "CI_WORKSPACE="+e.workingdir+"/"+proc.Environment["CI_REPO"])
Command = append(Command, "plugin-git")
} else {
// Use "image name" as run command
Command = append(Command, proc.Image[18:len(proc.Image)-7])
Command = append(Command, "-c")
// Decode script and delete initial lines
// Deleting the initial lines removes netrc support but adds compatibility for more shells like fish
Script, _ := base64.RawStdEncoding.DecodeString(proc.Environment["CI_SCRIPT"])
Command = append(Command, "cd "+e.workingdir+"/"+proc.Environment["CI_REPO"]+" && "+string(Script)[strings.Index(string(Script), "\n\n")+2:])
}
// Prepare command
var err error
e.cmd, err = e.client.CommandContext(ctx, "/bin/env", Command...)
if err != nil {
return err
}
// Get output and redirect Stderr to Stdout
std, _ := e.cmd.StdoutPipe()
e.output = readCloser{std}
e.cmd.Stderr = e.cmd.Stdout
return e.cmd.Start()
}
// Wait for the pipeline step to complete and returns
// the completion results.
func (e *ssh) Wait(context.Context, *types.Step) (*types.State, error) {
return &types.State{
Exited: true,
}, e.cmd.Wait()
}
// Tail the pipeline step logs.
func (e *ssh) Tail(context.Context, *types.Step) (io.ReadCloser, error) {
return e.output, nil
}
// Destroy the pipeline environment.
func (e *ssh) Destroy(context.Context, *types.Config) error {
e.client.Close()
sftp, err := e.client.NewSftp()
if err != nil {
return err
}
return sftp.RemoveDirectory(e.workingdir)
}

27
vendor/github.com/kr/fs/LICENSE generated vendored Normal file
View file

@ -0,0 +1,27 @@
Copyright (c) 2012 The Go Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

3
vendor/github.com/kr/fs/Readme generated vendored Normal file
View file

@ -0,0 +1,3 @@
Filesystem Package
http://godoc.org/github.com/kr/fs

36
vendor/github.com/kr/fs/filesystem.go generated vendored Normal file
View file

@ -0,0 +1,36 @@
package fs
import (
"io/ioutil"
"os"
"path/filepath"
)
// FileSystem defines the methods of an abstract filesystem.
type FileSystem interface {
// ReadDir reads the directory named by dirname and returns a
// list of directory entries.
ReadDir(dirname string) ([]os.FileInfo, error)
// Lstat returns a FileInfo describing the named file. If the file is a
// symbolic link, the returned FileInfo describes the symbolic link. Lstat
// makes no attempt to follow the link.
Lstat(name string) (os.FileInfo, error)
// Join joins any number of path elements into a single path, adding a
// separator if necessary. The result is Cleaned; in particular, all
// empty strings are ignored.
//
// The separator is FileSystem specific.
Join(elem ...string) string
}
// fs represents a FileSystem provided by the os package.
type fs struct{}
func (f *fs) ReadDir(dirname string) ([]os.FileInfo, error) { return ioutil.ReadDir(dirname) }
func (f *fs) Lstat(name string) (os.FileInfo, error) { return os.Lstat(name) }
func (f *fs) Join(elem ...string) string { return filepath.Join(elem...) }

1
vendor/github.com/kr/fs/go.mod generated vendored Normal file
View file

@ -0,0 +1 @@
module "github.com/kr/fs"

95
vendor/github.com/kr/fs/walk.go generated vendored Normal file
View file

@ -0,0 +1,95 @@
// Package fs provides filesystem-related functions.
package fs
import (
"os"
)
// Walker provides a convenient interface for iterating over the
// descendants of a filesystem path.
// Successive calls to the Step method will step through each
// file or directory in the tree, including the root. The files
// are walked in lexical order, which makes the output deterministic
// but means that for very large directories Walker can be inefficient.
// Walker does not follow symbolic links.
type Walker struct {
fs FileSystem
cur item
stack []item
descend bool
}
type item struct {
path string
info os.FileInfo
err error
}
// Walk returns a new Walker rooted at root.
func Walk(root string) *Walker {
return WalkFS(root, new(fs))
}
// WalkFS returns a new Walker rooted at root on the FileSystem fs.
func WalkFS(root string, fs FileSystem) *Walker {
info, err := fs.Lstat(root)
return &Walker{
fs: fs,
stack: []item{{root, info, err}},
}
}
// Step advances the Walker to the next file or directory,
// which will then be available through the Path, Stat,
// and Err methods.
// It returns false when the walk stops at the end of the tree.
func (w *Walker) Step() bool {
if w.descend && w.cur.err == nil && w.cur.info.IsDir() {
list, err := w.fs.ReadDir(w.cur.path)
if err != nil {
w.cur.err = err
w.stack = append(w.stack, w.cur)
} else {
for i := len(list) - 1; i >= 0; i-- {
path := w.fs.Join(w.cur.path, list[i].Name())
w.stack = append(w.stack, item{path, list[i], nil})
}
}
}
if len(w.stack) == 0 {
return false
}
i := len(w.stack) - 1
w.cur = w.stack[i]
w.stack = w.stack[:i]
w.descend = true
return true
}
// Path returns the path to the most recent file or directory
// visited by a call to Step. It contains the argument to Walk
// as a prefix; that is, if Walk is called with "dir", which is
// a directory containing the file "a", Path will return "dir/a".
func (w *Walker) Path() string {
return w.cur.path
}
// Stat returns info for the most recent file or directory
// visited by a call to Step.
func (w *Walker) Stat() os.FileInfo {
return w.cur.info
}
// Err returns the error, if any, for the most recent attempt
// by Step to visit a file or directory. If a directory has
// an error, w will not descend into that directory.
func (w *Walker) Err() error {
return w.cur.err
}
// SkipDir causes the currently visited directory to be skipped.
// If w is not on a directory, SkipDir has no effect.
func (w *Walker) SkipDir() {
w.descend = false
}

21
vendor/github.com/melbahja/goph/LICENSE generated vendored Normal file
View file

@ -0,0 +1,21 @@
MIT License
Copyright (c) 2020-present Mohamed El Bahja
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

190
vendor/github.com/melbahja/goph/README.md generated vendored Normal file
View file

@ -0,0 +1,190 @@
<div align="center">
<h1>Golang SSH Client.</h1>
<a href="https://github.com/melbahja/goph">
<img src="https://github.com/melbahja/goph/raw/master/.github/goph.png" width="200">
</a>
<h4 align="center">
Fast and easy golang ssh client module.
</h4>
<p>Goph is a lightweight Go SSH client focusing on simplicity!</p>
</div>
<p align="center">
<a href="#installation">Installation</a> ❘
<a href="#features">Features</a> ❘
<a href="#usage">Usage</a> ❘
<a href="#examples">Examples</a> ❘
<a href="#license">License</a>
</p>
## 🚀&nbsp; Installation and Documentation
```bash
go get github.com/melbahja/goph
```
You can find the docs at [go docs](https://pkg.go.dev/github.com/melbahja/goph).
## 🤘&nbsp; Features
- Easy to use and **simple API**.
- Supports **known hosts** by default.
- Supports connections with **passwords**.
- Supports connections with **private keys**.
- Supports connections with **protected private keys** with passphrase.
- Supports **upload** files from local to remote.
- Supports **download** files from remote to local.
- Supports connections with **ssh agent** (Unix systems only).
- Supports adding new hosts to **known_hosts file**.
- Supports **file system operations** like: `Open, Create, Chmod...`
- Supports **context.Context** for command cancellation.
## 📄&nbsp; Usage
Run a command via ssh:
```go
package main
import (
"log"
"fmt"
"github.com/melbahja/goph"
)
func main() {
// Start new ssh connection with private key.
auth, err := goph.Key("/home/mohamed/.ssh/id_rsa", "")
if err != nil {
log.Fatal(err)
}
client, err := goph.New("root", "192.1.1.3", auth)
if err != nil {
log.Fatal(err)
}
// Defer closing the network connection.
defer client.Close()
// Execute your command.
out, err := client.Run("ls /tmp/")
if err != nil {
log.Fatal(err)
}
// Get your output as []byte.
fmt.Println(string(out))
}
```
#### 🔐 Start Connection With Protected Private Key:
```go
auth, err := goph.Key("/home/mohamed/.ssh/id_rsa", "you_passphrase_here")
if err != nil {
// handle error
}
client, err := goph.New("root", "192.1.1.3", auth)
```
#### 🔑 Start Connection With Password:
```go
client, err := goph.New("root", "192.1.1.3", goph.Password("you_password_here"))
```
#### ☛ Start Connection With SSH Agent (Unix systems only):
```go
auth, err := goph.UseAgent()
if err != nil {
// handle error
}
client, err := goph.New("root", "192.1.1.3", auth)
```
#### ⤴️ Upload Local File to Remote:
```go
err := client.Upload("/path/to/local/file", "/path/to/remote/file")
```
#### ⤵️ Download Remote File to Local:
```go
err := client.Download("/path/to/remote/file", "/path/to/local/file")
```
#### ☛ Execute Bash Commands:
```go
out, err := client.Run("bash -c 'printenv'")
```
#### ☛ Execute Bash Command with timeout:
```go
context, cancel := context.WithTimeout(ctx, time.Second)
defer cancel()
// will send SIGINT and return error after 1 second
out, err := client.RunContext(ctx, "sleep 5")
```
#### ☛ Execute Bash Command With Env Variables:
```go
out, err := client.Run(`env MYVAR="MY VALUE" bash -c 'echo $MYVAR;'`)
```
#### 🥪 Using Goph Cmd:
`Goph.Cmd` struct is like the Go standard `os/exec.Cmd`.
```go
// Get new `Goph.Cmd`
cmd, err := client.Command("ls", "-alh", "/tmp")
// or with context:
// cmd, err := client.CommandContext(ctx, "ls", "-alh", "/tmp")
if err != nil {
// handle the error!
}
// You can set env vars, but the server must be configured to `AcceptEnv line`.
cmd.Env = []string{"MY_VAR=MYVALUE"}
// Run you command.
err = cmd.Run()
```
🗒️ Just like `os/exec.Cmd` you can run `CombinedOutput, Output, Start, Wait`, and [`ssh.Session`](https://pkg.go.dev/golang.org/x/crypto/ssh#Session) methods like `Signal`...
#### 📂 File System Operations Via SFTP:
You can easily get a [SFTP](https://github.com/pkg/sftp) client from Goph client:
```go
sftp, err := client.NewSftp()
if err != nil {
// handle the error!
}
file, err := sftp.Create("/tmp/remote_file")
file.Write([]byte(`Hello world`))
file.Close()
```
🗒️ For more file operations see [SFTP Docs](https://github.com/pkg/sftp).
## 🥙&nbsp; Examples
See [Examples](https://github.com/melbahja/ssh/blob/master/examples).
## 🤝&nbsp; Missing a Feature?
Feel free to open a new issue, or contact me.
## 📘&nbsp; License
Goph is provided under the [MIT License](https://github.com/melbahja/goph/blob/master/LICENSE).

80
vendor/github.com/melbahja/goph/auth.go generated vendored Normal file
View file

@ -0,0 +1,80 @@
// Copyright 2020 Mohammed El Bahja. All rights reserved.
// Use of this source code is governed by a MIT license.
package goph
import (
"fmt"
"io/ioutil"
"net"
"os"
"golang.org/x/crypto/ssh"
"golang.org/x/crypto/ssh/agent"
)
// Auth represents ssh auth methods.
type Auth []ssh.AuthMethod
// Password returns password auth method.
func Password(pass string) Auth {
return Auth{
ssh.Password(pass),
}
}
// Key returns auth method from private key with or without passphrase.
func Key(prvFile string, passphrase string) (Auth, error) {
signer, err := GetSigner(prvFile, passphrase)
if err != nil {
return nil, err
}
return Auth{
ssh.PublicKeys(signer),
}, nil
}
// HasAgent checks if ssh agent exists.
func HasAgent() bool {
return os.Getenv("SSH_AUTH_SOCK") != ""
}
// UseAgent auth via ssh agent, (Unix systems only)
func UseAgent() (Auth, error) {
sshAgent, err := net.Dial("unix", os.Getenv("SSH_AUTH_SOCK"))
if err != nil {
return nil, fmt.Errorf("could not find ssh agent: %w", err)
}
return Auth{
ssh.PublicKeysCallback(agent.NewClient(sshAgent).Signers),
}, nil
}
// GetSigner returns ssh signer from private key file.
func GetSigner(prvFile string, passphrase string) (ssh.Signer, error) {
var (
err error
signer ssh.Signer
)
privateKey, err := ioutil.ReadFile(prvFile)
if err != nil {
return nil, err
} else if passphrase != "" {
signer, err = ssh.ParsePrivateKeyWithPassphrase(privateKey, []byte(passphrase))
} else {
signer, err = ssh.ParsePrivateKey(privateKey)
}
return signer, err
}

213
vendor/github.com/melbahja/goph/client.go generated vendored Normal file
View file

@ -0,0 +1,213 @@
// Copyright 2020 Mohammed El Bahja. All rights reserved.
// Use of this source code is governed by a MIT license.
package goph
import (
"context"
"fmt"
"io"
"net"
"os"
"time"
"github.com/pkg/sftp"
"golang.org/x/crypto/ssh"
)
// Client represents Goph client.
type Client struct {
*ssh.Client
Config *Config
}
// Config for Client.
type Config struct {
Auth Auth
User string
Addr string
Port uint
Timeout time.Duration
Callback ssh.HostKeyCallback
}
// DefaultTimeout is the timeout of ssh client connection.
var DefaultTimeout = 20 * time.Second
// New starts a new ssh connection, the host public key must be in known hosts.
func New(user string, addr string, auth Auth) (c *Client, err error) {
callback, err := DefaultKnownHosts()
if err != nil {
return
}
c, err = NewConn(&Config{
User: user,
Addr: addr,
Port: 22,
Auth: auth,
Timeout: DefaultTimeout,
Callback: callback,
})
return
}
// NewUnknown starts a ssh connection get client without cheking knownhosts.
// PLEASE AVOID USING THIS, UNLESS YOU KNOW WHAT ARE YOU DOING!
// if there a "man in the middle proxy", this can harm you!
// You can add the key to know hosts and use New() func instead!
func NewUnknown(user string, addr string, auth Auth) (*Client, error) {
return NewConn(&Config{
User: user,
Addr: addr,
Port: 22,
Auth: auth,
Timeout: DefaultTimeout,
Callback: ssh.InsecureIgnoreHostKey(),
})
}
// NewConn returns new client and error if any.
func NewConn(config *Config) (c *Client, err error) {
c = &Client{
Config: config,
}
c.Client, err = Dial("tcp", config)
return
}
// Dial starts a client connection to SSH server based on config.
func Dial(proto string, c *Config) (*ssh.Client, error) {
return ssh.Dial(proto, net.JoinHostPort(c.Addr, fmt.Sprint(c.Port)), &ssh.ClientConfig{
User: c.User,
Auth: c.Auth,
Timeout: c.Timeout,
HostKeyCallback: c.Callback,
})
}
// Run starts a new SSH session and runs the cmd, it returns CombinedOutput and err if any.
func (c Client) Run(cmd string) ([]byte, error) {
var (
err error
sess *ssh.Session
)
if sess, err = c.NewSession(); err != nil {
return nil, err
}
defer sess.Close()
return sess.CombinedOutput(cmd)
}
// Run starts a new SSH session with context and runs the cmd. It returns CombinedOutput and err if any.
func (c Client) RunContext(ctx context.Context, name string) ([]byte, error) {
cmd, err := c.CommandContext(ctx, name)
if err != nil {
return nil, err
}
return cmd.CombinedOutput()
}
// Command returns new Cmd and error if any.
func (c Client) Command(name string, args ...string) (*Cmd, error) {
var (
sess *ssh.Session
err error
)
if sess, err = c.NewSession(); err != nil {
return nil, err
}
return &Cmd{
Path: name,
Args: args,
Session: sess,
Context: context.Background(),
}, nil
}
// Command returns new Cmd with context and error, if any.
func (c Client) CommandContext(ctx context.Context, name string, args ...string) (*Cmd, error) {
cmd, err := c.Command(name, args...)
if err != nil {
return cmd, err
}
cmd.Context = ctx
return cmd, nil
}
// NewSftp returns new sftp client and error if any.
func (c Client) NewSftp(opts ...sftp.ClientOption) (*sftp.Client, error) {
return sftp.NewClient(c.Client, opts...)
}
// Close client net connection.
func (c Client) Close() error {
return c.Client.Close()
}
// Upload a local file to remote server!
func (c Client) Upload(localPath string, remotePath string) (err error) {
local, err := os.Open(localPath)
if err != nil {
return
}
defer local.Close()
ftp, err := c.NewSftp()
if err != nil {
return
}
defer ftp.Close()
remote, err := ftp.Create(remotePath)
if err != nil {
return
}
defer remote.Close()
_, err = io.Copy(remote, local)
return
}
// Download file from remote server!
func (c Client) Download(remotePath string, localPath string) (err error) {
local, err := os.Create(localPath)
if err != nil {
return
}
defer local.Close()
ftp, err := c.NewSftp()
if err != nil {
return
}
defer ftp.Close()
remote, err := ftp.Open(remotePath)
if err != nil {
return
}
defer remote.Close()
if _, err = io.Copy(local, remote); err != nil {
return
}
return local.Sync()
}

121
vendor/github.com/melbahja/goph/cmd.go generated vendored Normal file
View file

@ -0,0 +1,121 @@
// Copyright 2020 Mohammed El Bahja. All rights reserved.
// Use of this source code is governed by a MIT license.
package goph
import (
"context"
"fmt"
"github.com/pkg/errors"
"golang.org/x/crypto/ssh"
"strings"
)
// Cmd it's like os/exec.Cmd but for ssh session.
type Cmd struct {
// Path to command executable filename
Path string
// Command args.
Args []string
// Session env vars.
Env []string
// SSH session.
*ssh.Session
// Context for cancellation
Context context.Context
}
// CombinedOutput runs cmd on the remote host and returns its combined stdout and stderr.
func (c *Cmd) CombinedOutput() ([]byte, error) {
if err := c.init(); err != nil {
return nil, errors.Wrap(err, "cmd init")
}
return c.runWithContext(func() ([]byte, error) {
return c.Session.CombinedOutput(c.String())
})
}
// Output runs cmd on the remote host and returns its stdout.
func (c *Cmd) Output() ([]byte, error) {
if err := c.init(); err != nil {
return nil, errors.Wrap(err, "cmd init")
}
return c.runWithContext(func() ([]byte, error) {
return c.Session.Output(c.String())
})
}
// Run runs cmd on the remote host.
func (c *Cmd) Run() error {
if err := c.init(); err != nil {
return errors.Wrap(err, "cmd init")
}
_, err := c.runWithContext(func() ([]byte, error) {
return nil, c.Session.Run(c.String())
})
return err
}
// Start runs the command on the remote host.
func (c *Cmd) Start() error {
if err := c.init(); err != nil {
return errors.Wrap(err, "cmd init")
}
return c.Session.Start(c.String())
}
// String return the command line string.
func (c *Cmd) String() string {
return fmt.Sprintf("%s %s", c.Path, strings.Join(c.Args, " "))
}
// Init inits and sets session env vars.
func (c *Cmd) init() (err error) {
// Set session env vars
var env []string
for _, value := range c.Env {
env = strings.Split(value, "=")
if err = c.Setenv(env[0], strings.Join(env[1:], "=")); err != nil {
return
}
}
return nil
}
// Command with context output.
type ctxCmdOutput struct {
output []byte
err error
}
// Executes the given callback within session. Sends SIGINT when the context is canceled.
func (c *Cmd) runWithContext(callback func() ([]byte, error)) ([]byte, error) {
outputChan := make(chan ctxCmdOutput)
go func() {
output, err := callback()
outputChan <- ctxCmdOutput{
output: output,
err: err,
}
}()
select {
case <-c.Context.Done():
_ = c.Session.Signal(ssh.SIGINT)
return nil, c.Context.Err()
case result := <-outputChan:
return result.output, result.err
}
}

11
vendor/github.com/melbahja/goph/go.mod generated vendored Normal file
View file

@ -0,0 +1,11 @@
module github.com/melbahja/goph
go 1.13
require (
github.com/pkg/errors v0.9.1
github.com/pkg/sftp v1.13.4
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519
golang.org/x/sys v0.0.0-20211031064116-611d5d643895 // indirect
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
)

50
vendor/github.com/melbahja/goph/go.sum generated vendored Normal file
View file

@ -0,0 +1,50 @@
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/kr/fs v0.1.0 h1:Jskdu9ieNAYnjxsi0LbQp1ulIKZV1LAFgK1tWhpZgl8=
github.com/kr/fs v0.1.0/go.mod h1:FFnZGqtBN9Gxj7eW1uZ42v5BccTP0vu6NEaFoC2HwRg=
github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pkg/sftp v1.12.0 h1:/f3b24xrDhkhddlaobPe2JgBqfdt+gC/NYl0QY9IOuI=
github.com/pkg/sftp v1.12.0/go.mod h1:fUqqXB5vEgVCZ131L+9say31RAri6aF6KDViawhxKK8=
github.com/pkg/sftp v1.13.4 h1:Lb0RYJCmgUcBgZosfoi9Y9sbl6+LJgOIgk/2Y4YjMFg=
github.com/pkg/sftp v1.13.4/go.mod h1:LzqnAvaD5TWeNBsZpfKxSYn1MbjWwOsCIAFFJbpIsK8=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.0.0-20201217014255-9d1352758620 h1:3wPMTskHO3+O6jqTEXyFcsnuxMQOqYSaHsDxcbUXpqA=
golang.org/x/crypto v0.0.0-20201217014255-9d1352758620/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 h1:7I4JAnoQBe7ZtJcBaYHi5UtiO8tQHbUSXxL+pnGRANg=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d h1:+R4KGOnez64A81RvjARKc4UT5/tI9ujCIVX+P5KiHuI=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201218084310-7d0127a74742 h1:+CBz4km/0KPU3RGTwARGh/noP3bEwtHcq+0YcBQM2JQ=
golang.org/x/sys v0.0.0-20201218084310-7d0127a74742/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210423185535-09eb48e85fd7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211031064116-611d5d643895 h1:iaNpwpnrgL5jzWS0vCNnfa8HqzxveCFpFx3uC/X4Tps=
golang.org/x/sys v0.0.0-20211031064116-611d5d643895/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221 h1:/ZHdbVpdR/jk3g30/d4yUL0JU9kksj8+F/bnQUVLGDM=
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20201210144234-2321bbc49cbf h1:MZ2shdL+ZM/XzY3ZGOnh4Nlpnxz5GSOhOmtHo3iPU6M=
golang.org/x/term v0.0.0-20201210144234-2321bbc49cbf/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

121
vendor/github.com/melbahja/goph/hosts.go generated vendored Normal file
View file

@ -0,0 +1,121 @@
// Copyright 2020 Mohammed El Bahja. All rights reserved.
// Use of this source code is governed by a MIT license.
package goph
import (
"errors"
"fmt"
"net"
"os"
"golang.org/x/crypto/ssh"
"golang.org/x/crypto/ssh/knownhosts"
)
// DefaultKnownHosts returns host key callback from default known hosts path, and error if any.
func DefaultKnownHosts() (ssh.HostKeyCallback, error) {
path, err := DefaultKnownHostsPath()
if err != nil {
return nil, err
}
return KnownHosts(path)
}
// KnownHosts returns host key callback from a custom known hosts path.
func KnownHosts(file string) (ssh.HostKeyCallback, error) {
return knownhosts.New(file)
}
// CheckKnownHost checks is host in known hosts file.
// it returns is the host found in known_hosts file and error, if the host found in
// known_hosts file and error not nil that means public key mismatch, maybe MAN IN THE MIDDLE ATTACK! you should not handshake.
func CheckKnownHost(host string, remote net.Addr, key ssh.PublicKey, knownFile string) (found bool, err error) {
var keyErr *knownhosts.KeyError
// Fallback to default known_hosts file
if knownFile == "" {
path, err := DefaultKnownHostsPath()
if err != nil {
return false, err
}
knownFile = path
}
// Get host key callback
callback, err := KnownHosts(knownFile)
if err != nil {
return false, err
}
// check if host already exists.
err = callback(host, remote, key)
// Known host already exists.
if err == nil {
return true, nil
}
// Make sure that the error returned from the callback is host not in file error.
// If keyErr.Want is greater than 0 length, that means host is in file with different key.
if errors.As(err, &keyErr) && len(keyErr.Want) > 0 {
return true, keyErr
}
// Some other error occurred and safest way to handle is to pass it back to user.
if err != nil {
return false, err
}
// Key is not trusted because it is not in the file.
return false, nil
}
// AddKnownHost add a a host to known hosts file.
func AddKnownHost(host string, remote net.Addr, key ssh.PublicKey, knownFile string) (err error) {
// Fallback to default known_hosts file
if knownFile == "" {
path, err := DefaultKnownHostsPath()
if err != nil {
return err
}
knownFile = path
}
f, err := os.OpenFile(knownFile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0600)
if err != nil {
return err
}
defer f.Close()
remoteNormalized := knownhosts.Normalize(remote.String())
hostNormalized := knownhosts.Normalize(host)
addresses := []string{remoteNormalized}
if hostNormalized != remoteNormalized {
addresses = append(addresses, hostNormalized)
}
_, err = f.WriteString(knownhosts.Line(addresses, key) + "\n")
return err
}
// DefaultKnownHostsPath returns default user knows hosts file.
func DefaultKnownHostsPath() (string, error) {
home, err := os.UserHomeDir()
if err != nil {
return "", err
}
return fmt.Sprintf("%s/.ssh/known_hosts", home), err
}

10
vendor/github.com/pkg/sftp/.gitignore generated vendored Normal file
View file

@ -0,0 +1,10 @@
.*.swo
.*.swp
server_standalone/server_standalone
examples/*/id_rsa
examples/*/id_rsa.pub
memprofile.out
memprofile.svg

3
vendor/github.com/pkg/sftp/CONTRIBUTORS generated vendored Normal file
View file

@ -0,0 +1,3 @@
Dave Cheney <dave@cheney.net>
Saulius Gurklys <s4uliu5@gmail.com>
John Eikenberry <jae@zhar.net>

9
vendor/github.com/pkg/sftp/LICENSE generated vendored Normal file
View file

@ -0,0 +1,9 @@
Copyright (c) 2013, Dave Cheney
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

27
vendor/github.com/pkg/sftp/Makefile generated vendored Normal file
View file

@ -0,0 +1,27 @@
.PHONY: integration integration_w_race benchmark
integration:
go test -integration -v ./...
go test -testserver -v ./...
go test -integration -testserver -v ./...
go test -integration -allocator -v ./...
go test -testserver -allocator -v ./...
go test -integration -testserver -allocator -v ./...
integration_w_race:
go test -race -integration -v ./...
go test -race -testserver -v ./...
go test -race -integration -testserver -v ./...
go test -race -integration -allocator -v ./...
go test -race -testserver -allocator -v ./...
go test -race -integration -allocator -testserver -v ./...
COUNT ?= 1
BENCHMARK_PATTERN ?= "."
benchmark:
go test -integration -run=NONE -bench=$(BENCHMARK_PATTERN) -benchmem -count=$(COUNT)
benchmark_w_memprofile:
go test -integration -run=NONE -bench=$(BENCHMARK_PATTERN) -benchmem -count=$(COUNT) -memprofile memprofile.out
go tool pprof -svg -output=memprofile.svg memprofile.out

44
vendor/github.com/pkg/sftp/README.md generated vendored Normal file
View file

@ -0,0 +1,44 @@
sftp
----
The `sftp` package provides support for file system operations on remote ssh
servers using the SFTP subsystem. It also implements an SFTP server for serving
files from the filesystem.
![CI Status](https://github.com/pkg/sftp/workflows/CI/badge.svg?branch=master&event=push) [![Go Reference](https://pkg.go.dev/badge/github.com/pkg/sftp.svg)](https://pkg.go.dev/github.com/pkg/sftp)
usage and examples
------------------
See [https://pkg.go.dev/github.com/pkg/sftp](https://pkg.go.dev/github.com/pkg/sftp) for
examples and usage.
The basic operation of the package mirrors the facilities of the
[os](http://golang.org/pkg/os) package.
The Walker interface for directory traversal is heavily inspired by Keith
Rarick's [fs](https://pkg.go.dev/github.com/kr/fs) package.
roadmap
-------
* There is way too much duplication in the Client methods. If there was an
unmarshal(interface{}) method this would reduce a heap of the duplication.
contributing
------------
We welcome pull requests, bug fixes and issue reports.
Before proposing a large change, first please discuss your change by raising an
issue.
For API/code bugs, please include a small, self contained code example to
reproduce the issue. For pull requests, remember test coverage.
We try to handle issues and pull requests with a 0 open philosophy. That means
we will try to address the submission as soon as possible and will work toward
a resolution. If progress can no longer be made (eg. unreproducible bug) or
stops (eg. unresponsive submitter), we will close the bug.
Thanks.

96
vendor/github.com/pkg/sftp/allocator.go generated vendored Normal file
View file

@ -0,0 +1,96 @@
package sftp
import (
"sync"
)
type allocator struct {
sync.Mutex
available [][]byte
// map key is the request order
used map[uint32][][]byte
}
func newAllocator() *allocator {
return &allocator{
// micro optimization: initialize available pages with an initial capacity
available: make([][]byte, 0, SftpServerWorkerCount*2),
used: make(map[uint32][][]byte),
}
}
// GetPage returns a previously allocated and unused []byte or create a new one.
// The slice have a fixed size = maxMsgLength, this value is suitable for both
// receiving new packets and reading the files to serve
func (a *allocator) GetPage(requestOrderID uint32) []byte {
a.Lock()
defer a.Unlock()
var result []byte
// get an available page and remove it from the available ones.
if len(a.available) > 0 {
truncLength := len(a.available) - 1
result = a.available[truncLength]
a.available[truncLength] = nil // clear out the internal pointer
a.available = a.available[:truncLength] // truncate the slice
}
// no preallocated slice found, just allocate a new one
if result == nil {
result = make([]byte, maxMsgLength)
}
// put result in used pages
a.used[requestOrderID] = append(a.used[requestOrderID], result)
return result
}
// ReleasePages marks unused all pages in use for the given requestID
func (a *allocator) ReleasePages(requestOrderID uint32) {
a.Lock()
defer a.Unlock()
if used := a.used[requestOrderID]; len(used) > 0 {
a.available = append(a.available, used...)
}
delete(a.used, requestOrderID)
}
// Free removes all the used and available pages.
// Call this method when the allocator is not needed anymore
func (a *allocator) Free() {
a.Lock()
defer a.Unlock()
a.available = nil
a.used = make(map[uint32][][]byte)
}
func (a *allocator) countUsedPages() int {
a.Lock()
defer a.Unlock()
num := 0
for _, p := range a.used {
num += len(p)
}
return num
}
func (a *allocator) countAvailablePages() int {
a.Lock()
defer a.Unlock()
return len(a.available)
}
func (a *allocator) isRequestOrderIDUsed(requestOrderID uint32) bool {
a.Lock()
defer a.Unlock()
_, ok := a.used[requestOrderID]
return ok
}

90
vendor/github.com/pkg/sftp/attrs.go generated vendored Normal file
View file

@ -0,0 +1,90 @@
package sftp
// ssh_FXP_ATTRS support
// see http://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-5
import (
"os"
"time"
)
const (
sshFileXferAttrSize = 0x00000001
sshFileXferAttrUIDGID = 0x00000002
sshFileXferAttrPermissions = 0x00000004
sshFileXferAttrACmodTime = 0x00000008
sshFileXferAttrExtended = 0x80000000
sshFileXferAttrAll = sshFileXferAttrSize | sshFileXferAttrUIDGID | sshFileXferAttrPermissions |
sshFileXferAttrACmodTime | sshFileXferAttrExtended
)
// fileInfo is an artificial type designed to satisfy os.FileInfo.
type fileInfo struct {
name string
stat *FileStat
}
// Name returns the base name of the file.
func (fi *fileInfo) Name() string { return fi.name }
// Size returns the length in bytes for regular files; system-dependent for others.
func (fi *fileInfo) Size() int64 { return int64(fi.stat.Size) }
// Mode returns file mode bits.
func (fi *fileInfo) Mode() os.FileMode { return toFileMode(fi.stat.Mode) }
// ModTime returns the last modification time of the file.
func (fi *fileInfo) ModTime() time.Time { return time.Unix(int64(fi.stat.Mtime), 0) }
// IsDir returns true if the file is a directory.
func (fi *fileInfo) IsDir() bool { return fi.Mode().IsDir() }
func (fi *fileInfo) Sys() interface{} { return fi.stat }
// FileStat holds the original unmarshalled values from a call to READDIR or
// *STAT. It is exported for the purposes of accessing the raw values via
// os.FileInfo.Sys(). It is also used server side to store the unmarshalled
// values for SetStat.
type FileStat struct {
Size uint64
Mode uint32
Mtime uint32
Atime uint32
UID uint32
GID uint32
Extended []StatExtended
}
// StatExtended contains additional, extended information for a FileStat.
type StatExtended struct {
ExtType string
ExtData string
}
func fileInfoFromStat(stat *FileStat, name string) os.FileInfo {
return &fileInfo{
name: name,
stat: stat,
}
}
func fileStatFromInfo(fi os.FileInfo) (uint32, *FileStat) {
mtime := fi.ModTime().Unix()
atime := mtime
var flags uint32 = sshFileXferAttrSize |
sshFileXferAttrPermissions |
sshFileXferAttrACmodTime
fileStat := &FileStat{
Size: uint64(fi.Size()),
Mode: fromFileMode(fi.Mode()),
Mtime: uint32(mtime),
Atime: uint32(atime),
}
// os specific file stat decoding
fileStatFromInfoOs(fi, &flags, fileStat)
return flags, fileStat
}

11
vendor/github.com/pkg/sftp/attrs_stubs.go generated vendored Normal file
View file

@ -0,0 +1,11 @@
// +build plan9 windows android
package sftp
import (
"os"
)
func fileStatFromInfoOs(fi os.FileInfo, flags *uint32, fileStat *FileStat) {
// todo
}

16
vendor/github.com/pkg/sftp/attrs_unix.go generated vendored Normal file
View file

@ -0,0 +1,16 @@
// +build darwin dragonfly freebsd !android,linux netbsd openbsd solaris aix js
package sftp
import (
"os"
"syscall"
)
func fileStatFromInfoOs(fi os.FileInfo, flags *uint32, fileStat *FileStat) {
if statt, ok := fi.Sys().(*syscall.Stat_t); ok {
*flags |= sshFileXferAttrUIDGID
fileStat.UID = statt.Uid
fileStat.GID = statt.Gid
}
}

1936
vendor/github.com/pkg/sftp/client.go generated vendored Normal file
View file

File diff suppressed because it is too large Load diff

189
vendor/github.com/pkg/sftp/conn.go generated vendored Normal file
View file

@ -0,0 +1,189 @@
package sftp
import (
"encoding"
"fmt"
"io"
"sync"
)
// conn implements a bidirectional channel on which client and server
// connections are multiplexed.
type conn struct {
io.Reader
io.WriteCloser
// this is the same allocator used in packet manager
alloc *allocator
sync.Mutex // used to serialise writes to sendPacket
}
// the orderID is used in server mode if the allocator is enabled.
// For the client mode just pass 0
func (c *conn) recvPacket(orderID uint32) (uint8, []byte, error) {
return recvPacket(c, c.alloc, orderID)
}
func (c *conn) sendPacket(m encoding.BinaryMarshaler) error {
c.Lock()
defer c.Unlock()
return sendPacket(c, m)
}
func (c *conn) Close() error {
c.Lock()
defer c.Unlock()
return c.WriteCloser.Close()
}
type clientConn struct {
conn
wg sync.WaitGroup
sync.Mutex // protects inflight
inflight map[uint32]chan<- result // outstanding requests
closed chan struct{}
err error
}
// Wait blocks until the conn has shut down, and return the error
// causing the shutdown. It can be called concurrently from multiple
// goroutines.
func (c *clientConn) Wait() error {
<-c.closed
return c.err
}
// Close closes the SFTP session.
func (c *clientConn) Close() error {
defer c.wg.Wait()
return c.conn.Close()
}
func (c *clientConn) loop() {
defer c.wg.Done()
err := c.recv()
if err != nil {
c.broadcastErr(err)
}
}
// recv continuously reads from the server and forwards responses to the
// appropriate channel.
func (c *clientConn) recv() error {
defer c.conn.Close()
for {
typ, data, err := c.recvPacket(0)
if err != nil {
return err
}
sid, _, err := unmarshalUint32Safe(data)
if err != nil {
return err
}
ch, ok := c.getChannel(sid)
if !ok {
// This is an unexpected occurrence. Send the error
// back to all listeners so that they terminate
// gracefully.
return fmt.Errorf("sid not found: %d", sid)
}
ch <- result{typ: typ, data: data}
}
}
func (c *clientConn) putChannel(ch chan<- result, sid uint32) bool {
c.Lock()
defer c.Unlock()
select {
case <-c.closed:
// already closed with broadcastErr, return error on chan.
ch <- result{err: ErrSSHFxConnectionLost}
return false
default:
}
c.inflight[sid] = ch
return true
}
func (c *clientConn) getChannel(sid uint32) (chan<- result, bool) {
c.Lock()
defer c.Unlock()
ch, ok := c.inflight[sid]
delete(c.inflight, sid)
return ch, ok
}
// result captures the result of receiving the a packet from the server
type result struct {
typ byte
data []byte
err error
}
type idmarshaler interface {
id() uint32
encoding.BinaryMarshaler
}
func (c *clientConn) sendPacket(ch chan result, p idmarshaler) (byte, []byte, error) {
if cap(ch) < 1 {
ch = make(chan result, 1)
}
c.dispatchRequest(ch, p)
s := <-ch
return s.typ, s.data, s.err
}
// dispatchRequest should ideally only be called by race-detection tests outside of this file,
// where you have to ensure two packets are in flight sequentially after each other.
func (c *clientConn) dispatchRequest(ch chan<- result, p idmarshaler) {
sid := p.id()
if !c.putChannel(ch, sid) {
// already closed.
return
}
if err := c.conn.sendPacket(p); err != nil {
if ch, ok := c.getChannel(sid); ok {
ch <- result{err: err}
}
}
}
// broadcastErr sends an error to all goroutines waiting for a response.
func (c *clientConn) broadcastErr(err error) {
c.Lock()
defer c.Unlock()
bcastRes := result{err: ErrSSHFxConnectionLost}
for sid, ch := range c.inflight {
ch <- bcastRes
// Replace the chan in inflight,
// we have hijacked this chan,
// and this guarantees always-only-once sending.
c.inflight[sid] = make(chan<- result, 1)
}
c.err = err
close(c.closed)
}
type serverConn struct {
conn
}
func (s *serverConn) sendError(id uint32, err error) error {
return s.sendPacket(statusFromError(id, err))
}

9
vendor/github.com/pkg/sftp/debug.go generated vendored Normal file
View file

@ -0,0 +1,9 @@
// +build debug
package sftp
import "log"
func debug(fmt string, args ...interface{}) {
log.Printf(fmt, args...)
}

22
vendor/github.com/pkg/sftp/fuzz.go generated vendored Normal file
View file

@ -0,0 +1,22 @@
// +build gofuzz
package sftp
import "bytes"
type sinkfuzz struct{}
func (*sinkfuzz) Close() error { return nil }
func (*sinkfuzz) Write(p []byte) (int, error) { return len(p), nil }
var devnull = &sinkfuzz{}
// To run: go-fuzz-build && go-fuzz
func Fuzz(data []byte) int {
c, err := NewClientPipe(bytes.NewReader(data), devnull)
if err != nil {
return 0
}
c.Close()
return 1
}

10
vendor/github.com/pkg/sftp/go.mod generated vendored Normal file
View file

@ -0,0 +1,10 @@
module github.com/pkg/sftp
go 1.15
require (
github.com/kr/fs v0.1.0
github.com/stretchr/testify v1.7.0
golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b
golang.org/x/sys v0.0.0-20210423185535-09eb48e85fd7 // indirect
)

23
vendor/github.com/pkg/sftp/go.sum generated vendored Normal file
View file

@ -0,0 +1,23 @@
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/kr/fs v0.1.0 h1:Jskdu9ieNAYnjxsi0LbQp1ulIKZV1LAFgK1tWhpZgl8=
github.com/kr/fs v0.1.0/go.mod h1:FFnZGqtBN9Gxj7eW1uZ42v5BccTP0vu6NEaFoC2HwRg=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b h1:7mWr3k41Qtv8XlltBkDkl8LoP3mpSgBW8BUoxtEdbXg=
golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210423185535-09eb48e85fd7 h1:iGu644GcxtEcrInvDsQRCwJjtCIOlT2V7IRt6ah2Whw=
golang.org/x/sys v0.0.0-20210423185535-09eb48e85fd7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 h1:v+OssWQX+hTHEmOBgwxdZxK4zHq3yOs8F9J7mk0PY8E=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

326
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/attrs.go generated vendored Normal file
View file

@ -0,0 +1,326 @@
package filexfer
// Attributes related flags.
const (
AttrSize = 1 << iota // SSH_FILEXFER_ATTR_SIZE
AttrUIDGID // SSH_FILEXFER_ATTR_UIDGID
AttrPermissions // SSH_FILEXFER_ATTR_PERMISSIONS
AttrACModTime // SSH_FILEXFER_ACMODTIME
AttrExtended = 1 << 31 // SSH_FILEXFER_ATTR_EXTENDED
)
// Attributes defines the file attributes type defined in draft-ietf-secsh-filexfer-02
//
// Defined in: https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-5
type Attributes struct {
Flags uint32
// AttrSize
Size uint64
// AttrUIDGID
UID uint32
GID uint32
// AttrPermissions
Permissions FileMode
// AttrACmodTime
ATime uint32
MTime uint32
// AttrExtended
ExtendedAttributes []ExtendedAttribute
}
// GetSize returns the Size field and a bool that is true if and only if the value is valid/defined.
func (a *Attributes) GetSize() (size uint64, ok bool) {
return a.Size, a.Flags&AttrSize != 0
}
// SetSize is a convenience function that sets the Size field,
// and marks the field as valid/defined in Flags.
func (a *Attributes) SetSize(size uint64) {
a.Flags |= AttrSize
a.Size = size
}
// GetUIDGID returns the UID and GID fields and a bool that is true if and only if the values are valid/defined.
func (a *Attributes) GetUIDGID() (uid, gid uint32, ok bool) {
return a.UID, a.GID, a.Flags&AttrUIDGID != 0
}
// SetUIDGID is a convenience function that sets the UID and GID fields,
// and marks the fields as valid/defined in Flags.
func (a *Attributes) SetUIDGID(uid, gid uint32) {
a.Flags |= AttrUIDGID
a.UID = uid
a.GID = gid
}
// GetPermissions returns the Permissions field and a bool that is true if and only if the value is valid/defined.
func (a *Attributes) GetPermissions() (perms FileMode, ok bool) {
return a.Permissions, a.Flags&AttrPermissions != 0
}
// SetPermissions is a convenience function that sets the Permissions field,
// and marks the field as valid/defined in Flags.
func (a *Attributes) SetPermissions(perms FileMode) {
a.Flags |= AttrPermissions
a.Permissions = perms
}
// GetACModTime returns the ATime and MTime fields and a bool that is true if and only if the values are valid/defined.
func (a *Attributes) GetACModTime() (atime, mtime uint32, ok bool) {
return a.ATime, a.MTime, a.Flags&AttrACModTime != 0
return a.ATime, a.MTime, a.Flags&AttrACModTime != 0
}
// SetACModTime is a convenience function that sets the ATime and MTime fields,
// and marks the fields as valid/defined in Flags.
func (a *Attributes) SetACModTime(atime, mtime uint32) {
a.Flags |= AttrACModTime
a.ATime = atime
a.MTime = mtime
}
// Len returns the number of bytes a would marshal into.
func (a *Attributes) Len() int {
length := 4
if a.Flags&AttrSize != 0 {
length += 8
}
if a.Flags&AttrUIDGID != 0 {
length += 4 + 4
}
if a.Flags&AttrPermissions != 0 {
length += 4
}
if a.Flags&AttrACModTime != 0 {
length += 4 + 4
}
if a.Flags&AttrExtended != 0 {
length += 4
for _, ext := range a.ExtendedAttributes {
length += ext.Len()
}
}
return length
}
// MarshalInto marshals e onto the end of the given Buffer.
func (a *Attributes) MarshalInto(b *Buffer) {
b.AppendUint32(a.Flags)
if a.Flags&AttrSize != 0 {
b.AppendUint64(a.Size)
}
if a.Flags&AttrUIDGID != 0 {
b.AppendUint32(a.UID)
b.AppendUint32(a.GID)
}
if a.Flags&AttrPermissions != 0 {
b.AppendUint32(uint32(a.Permissions))
}
if a.Flags&AttrACModTime != 0 {
b.AppendUint32(a.ATime)
b.AppendUint32(a.MTime)
}
if a.Flags&AttrExtended != 0 {
b.AppendUint32(uint32(len(a.ExtendedAttributes)))
for _, ext := range a.ExtendedAttributes {
ext.MarshalInto(b)
}
}
}
// MarshalBinary returns a as the binary encoding of a.
func (a *Attributes) MarshalBinary() ([]byte, error) {
buf := NewBuffer(make([]byte, 0, a.Len()))
a.MarshalInto(buf)
return buf.Bytes(), nil
}
// UnmarshalFrom unmarshals an Attributes from the given Buffer into e.
//
// NOTE: The values of fields not covered in the a.Flags are explicitly undefined.
func (a *Attributes) UnmarshalFrom(b *Buffer) (err error) {
flags, err := b.ConsumeUint32()
if err != nil {
return err
}
return a.XXX_UnmarshalByFlags(flags, b)
}
// XXX_UnmarshalByFlags uses the pre-existing a.Flags field to determine which fields to decode.
// DO NOT USE THIS: it is an anti-corruption function to implement existing internal usage in pkg/sftp.
// This function is not a part of any compatibility promise.
func (a *Attributes) XXX_UnmarshalByFlags(flags uint32, b *Buffer) (err error) {
a.Flags = flags
// Short-circuit dummy attributes.
if a.Flags == 0 {
return nil
}
if a.Flags&AttrSize != 0 {
if a.Size, err = b.ConsumeUint64(); err != nil {
return err
}
}
if a.Flags&AttrUIDGID != 0 {
if a.UID, err = b.ConsumeUint32(); err != nil {
return err
}
if a.GID, err = b.ConsumeUint32(); err != nil {
return err
}
}
if a.Flags&AttrPermissions != 0 {
m, err := b.ConsumeUint32()
if err != nil {
return err
}
a.Permissions = FileMode(m)
}
if a.Flags&AttrACModTime != 0 {
if a.ATime, err = b.ConsumeUint32(); err != nil {
return err
}
if a.MTime, err = b.ConsumeUint32(); err != nil {
return err
}
}
if a.Flags&AttrExtended != 0 {
count, err := b.ConsumeUint32()
if err != nil {
return err
}
a.ExtendedAttributes = make([]ExtendedAttribute, count)
for i := range a.ExtendedAttributes {
a.ExtendedAttributes[i].UnmarshalFrom(b)
}
}
return nil
}
// UnmarshalBinary decodes the binary encoding of Attributes into e.
func (a *Attributes) UnmarshalBinary(data []byte) error {
return a.UnmarshalFrom(NewBuffer(data))
}
// ExtendedAttribute defines the extended file attribute type defined in draft-ietf-secsh-filexfer-02
//
// Defined in: https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-5
type ExtendedAttribute struct {
Type string
Data string
}
// Len returns the number of bytes e would marshal into.
func (e *ExtendedAttribute) Len() int {
return 4 + len(e.Type) + 4 + len(e.Data)
}
// MarshalInto marshals e onto the end of the given Buffer.
func (e *ExtendedAttribute) MarshalInto(b *Buffer) {
b.AppendString(e.Type)
b.AppendString(e.Data)
}
// MarshalBinary returns e as the binary encoding of e.
func (e *ExtendedAttribute) MarshalBinary() ([]byte, error) {
buf := NewBuffer(make([]byte, 0, e.Len()))
e.MarshalInto(buf)
return buf.Bytes(), nil
}
// UnmarshalFrom unmarshals an ExtendedAattribute from the given Buffer into e.
func (e *ExtendedAttribute) UnmarshalFrom(b *Buffer) (err error) {
if e.Type, err = b.ConsumeString(); err != nil {
return err
}
if e.Data, err = b.ConsumeString(); err != nil {
return err
}
return nil
}
// UnmarshalBinary decodes the binary encoding of ExtendedAttribute into e.
func (e *ExtendedAttribute) UnmarshalBinary(data []byte) error {
return e.UnmarshalFrom(NewBuffer(data))
}
// NameEntry implements the SSH_FXP_NAME repeated data type from draft-ietf-secsh-filexfer-02
//
// This type is incompatible with versions 4 or higher.
type NameEntry struct {
Filename string
Longname string
Attrs Attributes
}
// Len returns the number of bytes e would marshal into.
func (e *NameEntry) Len() int {
return 4 + len(e.Filename) + 4 + len(e.Longname) + e.Attrs.Len()
}
// MarshalInto marshals e onto the end of the given Buffer.
func (e *NameEntry) MarshalInto(b *Buffer) {
b.AppendString(e.Filename)
b.AppendString(e.Longname)
e.Attrs.MarshalInto(b)
}
// MarshalBinary returns e as the binary encoding of e.
func (e *NameEntry) MarshalBinary() ([]byte, error) {
buf := NewBuffer(make([]byte, 0, e.Len()))
e.MarshalInto(buf)
return buf.Bytes(), nil
}
// UnmarshalFrom unmarshals an NameEntry from the given Buffer into e.
//
// NOTE: The values of fields not covered in the a.Flags are explicitly undefined.
func (e *NameEntry) UnmarshalFrom(b *Buffer) (err error) {
if e.Filename, err = b.ConsumeString(); err != nil {
return err
}
if e.Longname, err = b.ConsumeString(); err != nil {
return err
}
return e.Attrs.UnmarshalFrom(b)
}
// UnmarshalBinary decodes the binary encoding of NameEntry into e.
func (e *NameEntry) UnmarshalBinary(data []byte) error {
return e.UnmarshalFrom(NewBuffer(data))
}

293
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/buffer.go generated vendored Normal file
View file

@ -0,0 +1,293 @@
package filexfer
import (
"encoding/binary"
"errors"
)
// Various encoding errors.
var (
ErrShortPacket = errors.New("packet too short")
ErrLongPacket = errors.New("packet too long")
)
// Buffer wraps up the various encoding details of the SSH format.
//
// Data types are encoded as per section 4 from https://tools.ietf.org/html/draft-ietf-secsh-architecture-09#page-8
type Buffer struct {
b []byte
off int
}
// NewBuffer creates and initializes a new buffer using buf as its initial contents.
// The new buffer takes ownership of buf, and the caller should not use buf after this call.
//
// In most cases, new(Buffer) (or just declaring a Buffer variable) is sufficient to initialize a Buffer.
func NewBuffer(buf []byte) *Buffer {
return &Buffer{
b: buf,
}
}
// NewMarshalBuffer creates a new Buffer ready to start marshaling a Packet into.
// It preallocates enough space for uint32(length), uint8(type), uint32(request-id) and size more bytes.
func NewMarshalBuffer(size int) *Buffer {
return NewBuffer(make([]byte, 4+1+4+size))
}
// Bytes returns a slice of length b.Len() holding the unconsumed bytes in the Buffer.
// The slice is valid for use only until the next buffer modification
// (that is, only until the next call to an Append or Consume method).
func (b *Buffer) Bytes() []byte {
return b.b[b.off:]
}
// Len returns the number of unconsumed bytes in the buffer.
func (b *Buffer) Len() int { return len(b.b) - b.off }
// Cap returns the capacity of the buffer’s underlying byte slice,
// that is, the total space allocated for the buffer’s data.
func (b *Buffer) Cap() int { return cap(b.b) }
// Reset resets the buffer to be empty, but it retains the underlying storage for use by future Appends.
func (b *Buffer) Reset() {
b.b = b.b[:0]
b.off = 0
}
// StartPacket resets and initializes the buffer to be ready to start marshaling a packet into.
// It truncates the buffer, reserves space for uint32(length), then appends the given packetType and requestID.
func (b *Buffer) StartPacket(packetType PacketType, requestID uint32) {
b.b, b.off = append(b.b[:0], make([]byte, 4)...), 0
b.AppendUint8(uint8(packetType))
b.AppendUint32(requestID)
}
// Packet finalizes the packet started from StartPacket.
// It is expected that this will end the ownership of the underlying byte-slice,
// and so the returned byte-slices may be reused the same as any other byte-slice,
// the caller should not use this buffer after this call.
//
// It writes the packet body length into the first four bytes of the buffer in network byte order (big endian).
// The packet body length is the length of this buffer less the 4-byte length itself, plus the length of payload.
//
// It is assumed that no Consume methods have been called on this buffer,
// and so it returns the whole underlying slice.
func (b *Buffer) Packet(payload []byte) (header, payloadPassThru []byte, err error) {
b.PutLength(len(b.b) - 4 + len(payload))
return b.b, payload, nil
}
// ConsumeUint8 consumes a single byte from the buffer.
// If the buffer does not have enough data, it will return ErrShortPacket.
func (b *Buffer) ConsumeUint8() (uint8, error) {
if b.Len() < 1 {
return 0, ErrShortPacket
}
var v uint8
v, b.off = b.b[b.off], b.off+1
return v, nil
}
// AppendUint8 appends a single byte into the buffer.
func (b *Buffer) AppendUint8(v uint8) {
b.b = append(b.b, v)
}
// ConsumeBool consumes a single byte from the buffer, and returns true if that byte is non-zero.
// If the buffer does not have enough data, it will return ErrShortPacket.
func (b *Buffer) ConsumeBool() (bool, error) {
v, err := b.ConsumeUint8()
if err != nil {
return false, err
}
return v != 0, nil
}
// AppendBool appends a single bool into the buffer.
// It encodes it as a single byte, with false as 0, and true as 1.
func (b *Buffer) AppendBool(v bool) {
if v {
b.AppendUint8(1)
} else {
b.AppendUint8(0)
}
}
// ConsumeUint16 consumes a single uint16 from the buffer, in network byte order (big-endian).
// If the buffer does not have enough data, it will return ErrShortPacket.
func (b *Buffer) ConsumeUint16() (uint16, error) {
if b.Len() < 2 {
return 0, ErrShortPacket
}
v := binary.BigEndian.Uint16(b.b[b.off:])
b.off += 2
return v, nil
}
// AppendUint16 appends single uint16 into the buffer, in network byte order (big-endian).
func (b *Buffer) AppendUint16(v uint16) {
b.b = append(b.b,
byte(v>>8),
byte(v>>0),
)
}
// unmarshalUint32 is used internally to read the packet length.
// It is unsafe, and so not exported.
// Even within this package, its use should be avoided.
func unmarshalUint32(b []byte) uint32 {
return binary.BigEndian.Uint32(b[:4])
}
// ConsumeUint32 consumes a single uint32 from the buffer, in network byte order (big-endian).
// If the buffer does not have enough data, it will return ErrShortPacket.
func (b *Buffer) ConsumeUint32() (uint32, error) {
if b.Len() < 4 {
return 0, ErrShortPacket
}
v := binary.BigEndian.Uint32(b.b[b.off:])
b.off += 4
return v, nil
}
// AppendUint32 appends a single uint32 into the buffer, in network byte order (big-endian).
func (b *Buffer) AppendUint32(v uint32) {
b.b = append(b.b,
byte(v>>24),
byte(v>>16),
byte(v>>8),
byte(v>>0),
)
}
// ConsumeUint64 consumes a single uint64 from the buffer, in network byte order (big-endian).
// If the buffer does not have enough data, it will return ErrShortPacket.
func (b *Buffer) ConsumeUint64() (uint64, error) {
if b.Len() < 8 {
return 0, ErrShortPacket
}
v := binary.BigEndian.Uint64(b.b[b.off:])
b.off += 8
return v, nil
}
// AppendUint64 appends a single uint64 into the buffer, in network byte order (big-endian).
func (b *Buffer) AppendUint64(v uint64) {
b.b = append(b.b,
byte(v>>56),
byte(v>>48),
byte(v>>40),
byte(v>>32),
byte(v>>24),
byte(v>>16),
byte(v>>8),
byte(v>>0),
)
}
// ConsumeInt64 consumes a single int64 from the buffer, in network byte order (big-endian) with two’s complement.
// If the buffer does not have enough data, it will return ErrShortPacket.
func (b *Buffer) ConsumeInt64() (int64, error) {
u, err := b.ConsumeUint64()
if err != nil {
return 0, err
}
return int64(u), err
}
// AppendInt64 appends a single int64 into the buffer, in network byte order (big-endian) with two’s complement.
func (b *Buffer) AppendInt64(v int64) {
b.AppendUint64(uint64(v))
}
// ConsumeByteSlice consumes a single string of raw binary data from the buffer.
// A string is a uint32 length, followed by that number of raw bytes.
// If the buffer does not have enough data, or defines a length larger than available, it will return ErrShortPacket.
//
// The returned slice aliases the buffer contents, and is valid only as long as the buffer is not reused
// (that is, only until the next call to Reset, PutLength, StartPacket, or UnmarshalBinary).
//
// In no case will any Consume calls return overlapping slice aliases,
// and Append calls are guaranteed to not disturb this slice alias.
func (b *Buffer) ConsumeByteSlice() ([]byte, error) {
length, err := b.ConsumeUint32()
if err != nil {
return nil, err
}
if b.Len() < int(length) {
return nil, ErrShortPacket
}
v := b.b[b.off:]
if len(v) > int(length) {
v = v[:length:length]
}
b.off += int(length)
return v, nil
}
// AppendByteSlice appends a single string of raw binary data into the buffer.
// A string is a uint32 length, followed by that number of raw bytes.
func (b *Buffer) AppendByteSlice(v []byte) {
b.AppendUint32(uint32(len(v)))
b.b = append(b.b, v...)
}
// ConsumeString consumes a single string of binary data from the buffer.
// A string is a uint32 length, followed by that number of raw bytes.
// If the buffer does not have enough data, or defines a length larger than available, it will return ErrShortPacket.
//
// NOTE: Go implicitly assumes that strings contain UTF-8 encoded data.
// All caveats on using arbitrary binary data in Go strings applies.
func (b *Buffer) ConsumeString() (string, error) {
v, err := b.ConsumeByteSlice()
if err != nil {
return "", err
}
return string(v), nil
}
// AppendString appends a single string of binary data into the buffer.
// A string is a uint32 length, followed by that number of raw bytes.
func (b *Buffer) AppendString(v string) {
b.AppendByteSlice([]byte(v))
}
// PutLength writes the given size into the first four bytes of the buffer in network byte order (big endian).
func (b *Buffer) PutLength(size int) {
if len(b.b) < 4 {
b.b = append(b.b, make([]byte, 4-len(b.b))...)
}
binary.BigEndian.PutUint32(b.b, uint32(size))
}
// MarshalBinary returns a clone of the full internal buffer.
func (b *Buffer) MarshalBinary() ([]byte, error) {
clone := make([]byte, len(b.b))
n := copy(clone, b.b)
return clone[:n], nil
}
// UnmarshalBinary sets the internal buffer of b to be a clone of data, and zeros the internal offset.
func (b *Buffer) UnmarshalBinary(data []byte) error {
if grow := len(data) - len(b.b); grow > 0 {
b.b = append(b.b, make([]byte, grow)...)
}
n := copy(b.b, data)
b.b = b.b[:n]
b.off = 0
return nil
}

142
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/extended_packets.go generated vendored Normal file
View file

@ -0,0 +1,142 @@
package filexfer
import (
"encoding"
"sync"
)
// ExtendedData aliases the untyped interface composition of encoding.BinaryMarshaler and encoding.BinaryUnmarshaler.
type ExtendedData = interface {
encoding.BinaryMarshaler
encoding.BinaryUnmarshaler
}
// ExtendedDataConstructor defines a function that returns a new(ArbitraryExtendedPacket).
type ExtendedDataConstructor func() ExtendedData
var extendedPacketTypes = struct {
mu sync.RWMutex
constructors map[string]ExtendedDataConstructor
}{
constructors: make(map[string]ExtendedDataConstructor),
}
// RegisterExtendedPacketType defines a specific ExtendedDataConstructor for the given extension string.
func RegisterExtendedPacketType(extension string, constructor ExtendedDataConstructor) {
extendedPacketTypes.mu.Lock()
defer extendedPacketTypes.mu.Unlock()
if _, exist := extendedPacketTypes.constructors[extension]; exist {
panic("encoding/ssh/filexfer: multiple registration of extended packet type " + extension)
}
extendedPacketTypes.constructors[extension] = constructor
}
func newExtendedPacket(extension string) ExtendedData {
extendedPacketTypes.mu.RLock()
defer extendedPacketTypes.mu.RUnlock()
if f := extendedPacketTypes.constructors[extension]; f != nil {
return f()
}
return new(Buffer)
}
// ExtendedPacket defines the SSH_FXP_CLOSE packet.
type ExtendedPacket struct {
ExtendedRequest string
Data ExtendedData
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *ExtendedPacket) Type() PacketType {
return PacketTypeExtended
}
// MarshalPacket returns p as a two-part binary encoding of p.
//
// The Data is marshaled into binary, and returned as the payload.
func (p *ExtendedPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.ExtendedRequest) // string(extended-request)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeExtended, reqid)
buf.AppendString(p.ExtendedRequest)
if p.Data != nil {
payload, err = p.Data.MarshalBinary()
if err != nil {
return nil, nil, err
}
}
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
//
// If p.Data is nil, and the extension has been registered, a new type will be made from the registration.
// If the extension has not been registered, then a new Buffer will be allocated.
// Then the request-specific-data will be unmarshaled from the rest of the buffer.
func (p *ExtendedPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.ExtendedRequest, err = buf.ConsumeString(); err != nil {
return err
}
if p.Data == nil {
p.Data = newExtendedPacket(p.ExtendedRequest)
}
return p.Data.UnmarshalBinary(buf.Bytes())
}
// ExtendedReplyPacket defines the SSH_FXP_CLOSE packet.
type ExtendedReplyPacket struct {
Data ExtendedData
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *ExtendedReplyPacket) Type() PacketType {
return PacketTypeExtendedReply
}
// MarshalPacket returns p as a two-part binary encoding of p.
//
// The Data is marshaled into binary, and returned as the payload.
func (p *ExtendedReplyPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
buf = NewMarshalBuffer(0)
}
buf.StartPacket(PacketTypeExtendedReply, reqid)
if p.Data != nil {
payload, err = p.Data.MarshalBinary()
if err != nil {
return nil, nil, err
}
}
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
//
// If p.Data is nil, and there is request-specific-data,
// then the request-specific-data will be wrapped in a Buffer and assigned to p.Data.
func (p *ExtendedReplyPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Data == nil {
p.Data = new(Buffer)
}
return p.Data.UnmarshalBinary(buf.Bytes())
}

46
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/extensions.go generated vendored Normal file
View file

@ -0,0 +1,46 @@
package filexfer
// ExtensionPair defines the extension-pair type defined in draft-ietf-secsh-filexfer-13.
// This type is backwards-compatible with how draft-ietf-secsh-filexfer-02 defines extensions.
//
// Defined in: https://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-4.2
type ExtensionPair struct {
Name string
Data string
}
// Len returns the number of bytes e would marshal into.
func (e *ExtensionPair) Len() int {
return 4 + len(e.Name) + 4 + len(e.Data)
}
// MarshalInto marshals e onto the end of the given Buffer.
func (e *ExtensionPair) MarshalInto(buf *Buffer) {
buf.AppendString(e.Name)
buf.AppendString(e.Data)
}
// MarshalBinary returns e as the binary encoding of e.
func (e *ExtensionPair) MarshalBinary() ([]byte, error) {
buf := NewBuffer(make([]byte, 0, e.Len()))
e.MarshalInto(buf)
return buf.Bytes(), nil
}
// UnmarshalFrom unmarshals an ExtensionPair from the given Buffer into e.
func (e *ExtensionPair) UnmarshalFrom(buf *Buffer) (err error) {
if e.Name, err = buf.ConsumeString(); err != nil {
return err
}
if e.Data, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// UnmarshalBinary decodes the binary encoding of ExtensionPair into e.
func (e *ExtensionPair) UnmarshalBinary(data []byte) error {
return e.UnmarshalFrom(NewBuffer(data))
}

54
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/filexfer.go generated vendored Normal file
View file

@ -0,0 +1,54 @@
// Package filexfer implements the wire encoding for secsh-filexfer as described in https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02
package filexfer
// PacketMarshaller narrowly defines packets that will only be transmitted.
//
// ExtendedPacket types will often only implement this interface,
// since decoding the whole packet body of an ExtendedPacket can only be done dependent on the ExtendedRequest field.
type PacketMarshaller interface {
// MarshalPacket is the primary intended way to encode a packet.
// The request-id for the packet is set from reqid.
//
// An optional buffer may be given in b.
// If the buffer has a minimum capacity, it shall be truncated and used to marshal the header into.
// The minimum capacity for the packet must be a constant expression, and should be at least 9.
//
// It shall return the main body of the encoded packet in header,
// and may optionally return an additional payload to be written immediately after the header.
//
// It shall encode in the first 4-bytes of the header the proper length of the rest of the header+payload.
MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error)
}
// Packet defines the behavior of a full generic SFTP packet.
//
// InitPacket, and VersionPacket are not generic SFTP packets, and instead implement (Un)MarshalBinary.
//
// ExtendedPacket types should not iplement this interface,
// since decoding the whole packet body of an ExtendedPacket can only be done dependent on the ExtendedRequest field.
type Packet interface {
PacketMarshaller
// Type returns the SSH_FXP_xy value associated with the specific packet.
Type() PacketType
// UnmarshalPacketBody decodes a packet body from the given Buffer.
// It is assumed that the common header values of the length, type and request-id have already been consumed.
//
// Implementations should not alias the given Buffer,
// instead they can consider prepopulating an internal buffer as a hint,
// and copying into that buffer if it has sufficient length.
UnmarshalPacketBody(buf *Buffer) error
}
// ComposePacket converts returns from MarshalPacket into an equivalent call to MarshalBinary.
func ComposePacket(header, payload []byte, err error) ([]byte, error) {
return append(header, payload...), err
}
// Default length values,
// Defined in draft-ietf-secsh-filexfer-02 section 3.
const (
DefaultMaxPacketLength = 34000
DefaultMaxDataLength = 32768
)

147
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/fx.go generated vendored Normal file
View file

@ -0,0 +1,147 @@
package filexfer
import (
"fmt"
)
// Status defines the SFTP error codes used in SSH_FXP_STATUS response packets.
type Status uint32
// Defines the various SSH_FX_* values.
const (
// see draft-ietf-secsh-filexfer-02
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-7
StatusOK = Status(iota)
StatusEOF
StatusNoSuchFile
StatusPermissionDenied
StatusFailure
StatusBadMessage
StatusNoConnection
StatusConnectionLost
StatusOPUnsupported
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-03#section-7
StatusV4InvalidHandle
StatusV4NoSuchPath
StatusV4FileAlreadyExists
StatusV4WriteProtect
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-04#section-7
StatusV4NoMedia
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-05#section-7
StatusV5NoSpaceOnFilesystem
StatusV5QuotaExceeded
StatusV5UnknownPrincipal
StatusV5LockConflict
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-06#section-8
StatusV6DirNotEmpty
StatusV6NotADirectory
StatusV6InvalidFilename
StatusV6LinkLoop
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-07#section-8
StatusV6CannotDelete
StatusV6InvalidParameter
StatusV6FileIsADirectory
StatusV6ByteRangeLockConflict
StatusV6ByteRangeLockRefused
StatusV6DeletePending
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-08#section-8.1
StatusV6FileCorrupt
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-10#section-9.1
StatusV6OwnerInvalid
StatusV6GroupInvalid
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-9.1
StatusV6NoMatchingByteRangeLock
)
func (s Status) Error() string {
return s.String()
}
// Is returns true if the target is the same Status code,
// or target is a StatusPacket with the same Status code.
func (s Status) Is(target error) bool {
if target, ok := target.(*StatusPacket); ok {
return target.StatusCode == s
}
return s == target
}
func (s Status) String() string {
switch s {
case StatusOK:
return "SSH_FX_OK"
case StatusEOF:
return "SSH_FX_EOF"
case StatusNoSuchFile:
return "SSH_FX_NO_SUCH_FILE"
case StatusPermissionDenied:
return "SSH_FX_PERMISSION_DENIED"
case StatusFailure:
return "SSH_FX_FAILURE"
case StatusBadMessage:
return "SSH_FX_BAD_MESSAGE"
case StatusNoConnection:
return "SSH_FX_NO_CONNECTION"
case StatusConnectionLost:
return "SSH_FX_CONNECTION_LOST"
case StatusOPUnsupported:
return "SSH_FX_OP_UNSUPPORTED"
case StatusV4InvalidHandle:
return "SSH_FX_INVALID_HANDLE"
case StatusV4NoSuchPath:
return "SSH_FX_NO_SUCH_PATH"
case StatusV4FileAlreadyExists:
return "SSH_FX_FILE_ALREADY_EXISTS"
case StatusV4WriteProtect:
return "SSH_FX_WRITE_PROTECT"
case StatusV4NoMedia:
return "SSH_FX_NO_MEDIA"
case StatusV5NoSpaceOnFilesystem:
return "SSH_FX_NO_SPACE_ON_FILESYSTEM"
case StatusV5QuotaExceeded:
return "SSH_FX_QUOTA_EXCEEDED"
case StatusV5UnknownPrincipal:
return "SSH_FX_UNKNOWN_PRINCIPAL"
case StatusV5LockConflict:
return "SSH_FX_LOCK_CONFLICT"
case StatusV6DirNotEmpty:
return "SSH_FX_DIR_NOT_EMPTY"
case StatusV6NotADirectory:
return "SSH_FX_NOT_A_DIRECTORY"
case StatusV6InvalidFilename:
return "SSH_FX_INVALID_FILENAME"
case StatusV6LinkLoop:
return "SSH_FX_LINK_LOOP"
case StatusV6CannotDelete:
return "SSH_FX_CANNOT_DELETE"
case StatusV6InvalidParameter:
return "SSH_FX_INVALID_PARAMETER"
case StatusV6FileIsADirectory:
return "SSH_FX_FILE_IS_A_DIRECTORY"
case StatusV6ByteRangeLockConflict:
return "SSH_FX_BYTE_RANGE_LOCK_CONFLICT"
case StatusV6ByteRangeLockRefused:
return "SSH_FX_BYTE_RANGE_LOCK_REFUSED"
case StatusV6DeletePending:
return "SSH_FX_DELETE_PENDING"
case StatusV6FileCorrupt:
return "SSH_FX_FILE_CORRUPT"
case StatusV6OwnerInvalid:
return "SSH_FX_OWNER_INVALID"
case StatusV6GroupInvalid:
return "SSH_FX_GROUP_INVALID"
case StatusV6NoMatchingByteRangeLock:
return "SSH_FX_NO_MATCHING_BYTE_RANGE_LOCK"
default:
return fmt.Sprintf("SSH_FX_UNKNOWN(%d)", s)
}
}

124
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/fxp.go generated vendored Normal file
View file

@ -0,0 +1,124 @@
package filexfer
import (
"fmt"
)
// PacketType defines the various SFTP packet types.
type PacketType uint8
// Request packet types.
const (
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-3
PacketTypeInit = PacketType(iota + 1)
PacketTypeVersion
PacketTypeOpen
PacketTypeClose
PacketTypeRead
PacketTypeWrite
PacketTypeLStat
PacketTypeFStat
PacketTypeSetstat
PacketTypeFSetstat
PacketTypeOpenDir
PacketTypeReadDir
PacketTypeRemove
PacketTypeMkdir
PacketTypeRmdir
PacketTypeRealPath
PacketTypeStat
PacketTypeRename
PacketTypeReadLink
PacketTypeSymlink
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-07#section-3.3
PacketTypeV6Link
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-08#section-3.3
PacketTypeV6Block
PacketTypeV6Unblock
)
// Response packet types.
const (
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-3
PacketTypeStatus = PacketType(iota + 101)
PacketTypeHandle
PacketTypeData
PacketTypeName
PacketTypeAttrs
)
// Extended packet types.
const (
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-3
PacketTypeExtended = PacketType(iota + 200)
PacketTypeExtendedReply
)
func (f PacketType) String() string {
switch f {
case PacketTypeInit:
return "SSH_FXP_INIT"
case PacketTypeVersion:
return "SSH_FXP_VERSION"
case PacketTypeOpen:
return "SSH_FXP_OPEN"
case PacketTypeClose:
return "SSH_FXP_CLOSE"
case PacketTypeRead:
return "SSH_FXP_READ"
case PacketTypeWrite:
return "SSH_FXP_WRITE"
case PacketTypeLStat:
return "SSH_FXP_LSTAT"
case PacketTypeFStat:
return "SSH_FXP_FSTAT"
case PacketTypeSetstat:
return "SSH_FXP_SETSTAT"
case PacketTypeFSetstat:
return "SSH_FXP_FSETSTAT"
case PacketTypeOpenDir:
return "SSH_FXP_OPENDIR"
case PacketTypeReadDir:
return "SSH_FXP_READDIR"
case PacketTypeRemove:
return "SSH_FXP_REMOVE"
case PacketTypeMkdir:
return "SSH_FXP_MKDIR"
case PacketTypeRmdir:
return "SSH_FXP_RMDIR"
case PacketTypeRealPath:
return "SSH_FXP_REALPATH"
case PacketTypeStat:
return "SSH_FXP_STAT"
case PacketTypeRename:
return "SSH_FXP_RENAME"
case PacketTypeReadLink:
return "SSH_FXP_READLINK"
case PacketTypeSymlink:
return "SSH_FXP_SYMLINK"
case PacketTypeV6Link:
return "SSH_FXP_LINK"
case PacketTypeV6Block:
return "SSH_FXP_BLOCK"
case PacketTypeV6Unblock:
return "SSH_FXP_UNBLOCK"
case PacketTypeStatus:
return "SSH_FXP_STATUS"
case PacketTypeHandle:
return "SSH_FXP_HANDLE"
case PacketTypeData:
return "SSH_FXP_DATA"
case PacketTypeName:
return "SSH_FXP_NAME"
case PacketTypeAttrs:
return "SSH_FXP_ATTRS"
case PacketTypeExtended:
return "SSH_FXP_EXTENDED"
case PacketTypeExtendedReply:
return "SSH_FXP_EXTENDED_REPLY"
default:
return fmt.Sprintf("SSH_FXP_UNKNOWN(%d)", f)
}
}

249
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/handle_packets.go generated vendored Normal file
View file

@ -0,0 +1,249 @@
package filexfer
// ClosePacket defines the SSH_FXP_CLOSE packet.
type ClosePacket struct {
Handle string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *ClosePacket) Type() PacketType {
return PacketTypeClose
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *ClosePacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Handle) // string(handle)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeClose, reqid)
buf.AppendString(p.Handle)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *ClosePacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Handle, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// ReadPacket defines the SSH_FXP_READ packet.
type ReadPacket struct {
Handle string
Offset uint64
Len uint32
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *ReadPacket) Type() PacketType {
return PacketTypeRead
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *ReadPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
// string(handle) + uint64(offset) + uint32(len)
size := 4 + len(p.Handle) + 8 + 4
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeRead, reqid)
buf.AppendString(p.Handle)
buf.AppendUint64(p.Offset)
buf.AppendUint32(p.Len)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *ReadPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Handle, err = buf.ConsumeString(); err != nil {
return err
}
if p.Offset, err = buf.ConsumeUint64(); err != nil {
return err
}
if p.Len, err = buf.ConsumeUint32(); err != nil {
return err
}
return nil
}
// WritePacket defines the SSH_FXP_WRITE packet.
type WritePacket struct {
Handle string
Offset uint64
Data []byte
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *WritePacket) Type() PacketType {
return PacketTypeWrite
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *WritePacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
// string(handle) + uint64(offset) + uint32(len(data)); data content in payload
size := 4 + len(p.Handle) + 8 + 4
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeWrite, reqid)
buf.AppendString(p.Handle)
buf.AppendUint64(p.Offset)
buf.AppendUint32(uint32(len(p.Data)))
return buf.Packet(p.Data)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
//
// If p.Data is already populated, and of sufficient length to hold the data,
// then this will copy the data into that byte slice.
//
// If p.Data has a length insufficient to hold the data,
// then this will make a new slice of sufficient length, and copy the data into that.
//
// This means this _does not_ alias any of the data buffer that is passed in.
func (p *WritePacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Handle, err = buf.ConsumeString(); err != nil {
return err
}
if p.Offset, err = buf.ConsumeUint64(); err != nil {
return err
}
data, err := buf.ConsumeByteSlice()
if err != nil {
return err
}
if len(p.Data) < len(data) {
p.Data = make([]byte, len(data))
}
n := copy(p.Data, data)
p.Data = p.Data[:n]
return nil
}
// FStatPacket defines the SSH_FXP_FSTAT packet.
type FStatPacket struct {
Handle string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *FStatPacket) Type() PacketType {
return PacketTypeFStat
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *FStatPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Handle) // string(handle)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeFStat, reqid)
buf.AppendString(p.Handle)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *FStatPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Handle, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// FSetstatPacket defines the SSH_FXP_FSETSTAT packet.
type FSetstatPacket struct {
Handle string
Attrs Attributes
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *FSetstatPacket) Type() PacketType {
return PacketTypeFSetstat
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *FSetstatPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Handle) + p.Attrs.Len() // string(handle) + ATTRS(attrs)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeFSetstat, reqid)
buf.AppendString(p.Handle)
p.Attrs.MarshalInto(buf)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *FSetstatPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Handle, err = buf.ConsumeString(); err != nil {
return err
}
return p.Attrs.UnmarshalFrom(buf)
}
// ReadDirPacket defines the SSH_FXP_READDIR packet.
type ReadDirPacket struct {
Handle string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *ReadDirPacket) Type() PacketType {
return PacketTypeReadDir
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *ReadDirPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Handle) // string(handle)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeReadDir, reqid)
buf.AppendString(p.Handle)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *ReadDirPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Handle, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}

99
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/init_packets.go generated vendored Normal file
View file

@ -0,0 +1,99 @@
package filexfer
// InitPacket defines the SSH_FXP_INIT packet.
type InitPacket struct {
Version uint32
Extensions []*ExtensionPair
}
// MarshalBinary returns p as the binary encoding of p.
func (p *InitPacket) MarshalBinary() ([]byte, error) {
size := 1 + 4 // byte(type) + uint32(version)
for _, ext := range p.Extensions {
size += ext.Len()
}
b := NewBuffer(make([]byte, 4, 4+size))
b.AppendUint8(uint8(PacketTypeInit))
b.AppendUint32(p.Version)
for _, ext := range p.Extensions {
ext.MarshalInto(b)
}
b.PutLength(size)
return b.Bytes(), nil
}
// UnmarshalBinary unmarshals a full raw packet out of the given data.
// It is assumed that the uint32(length) has already been consumed to receive the data.
// It is also assumed that the uint8(type) has already been consumed to which packet to unmarshal into.
func (p *InitPacket) UnmarshalBinary(data []byte) (err error) {
buf := NewBuffer(data)
if p.Version, err = buf.ConsumeUint32(); err != nil {
return err
}
for buf.Len() > 0 {
var ext ExtensionPair
if err := ext.UnmarshalFrom(buf); err != nil {
return err
}
p.Extensions = append(p.Extensions, &ext)
}
return nil
}
// VersionPacket defines the SSH_FXP_VERSION packet.
type VersionPacket struct {
Version uint32
Extensions []*ExtensionPair
}
// MarshalBinary returns p as the binary encoding of p.
func (p *VersionPacket) MarshalBinary() ([]byte, error) {
size := 1 + 4 // byte(type) + uint32(version)
for _, ext := range p.Extensions {
size += ext.Len()
}
b := NewBuffer(make([]byte, 4, 4+size))
b.AppendUint8(uint8(PacketTypeVersion))
b.AppendUint32(p.Version)
for _, ext := range p.Extensions {
ext.MarshalInto(b)
}
b.PutLength(size)
return b.Bytes(), nil
}
// UnmarshalBinary unmarshals a full raw packet out of the given data.
// It is assumed that the uint32(length) has already been consumed to receive the data.
// It is also assumed that the uint8(type) has already been consumed to which packet to unmarshal into.
func (p *VersionPacket) UnmarshalBinary(data []byte) (err error) {
buf := NewBuffer(data)
if p.Version, err = buf.ConsumeUint32(); err != nil {
return err
}
for buf.Len() > 0 {
var ext ExtensionPair
if err := ext.UnmarshalFrom(buf); err != nil {
return err
}
p.Extensions = append(p.Extensions, &ext)
}
return nil
}

89
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/open_packets.go generated vendored Normal file
View file

@ -0,0 +1,89 @@
package filexfer
// SSH_FXF_* flags.
const (
FlagRead = 1 << iota // SSH_FXF_READ
FlagWrite // SSH_FXF_WRITE
FlagAppend // SSH_FXF_APPEND
FlagCreate // SSH_FXF_CREAT
FlagTruncate // SSH_FXF_TRUNC
FlagExclusive // SSH_FXF_EXCL
)
// OpenPacket defines the SSH_FXP_OPEN packet.
type OpenPacket struct {
Filename string
PFlags uint32
Attrs Attributes
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *OpenPacket) Type() PacketType {
return PacketTypeOpen
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *OpenPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
// string(filename) + uint32(pflags) + ATTRS(attrs)
size := 4 + len(p.Filename) + 4 + p.Attrs.Len()
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeOpen, reqid)
buf.AppendString(p.Filename)
buf.AppendUint32(p.PFlags)
p.Attrs.MarshalInto(buf)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *OpenPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Filename, err = buf.ConsumeString(); err != nil {
return err
}
if p.PFlags, err = buf.ConsumeUint32(); err != nil {
return err
}
return p.Attrs.UnmarshalFrom(buf)
}
// OpenDirPacket defines the SSH_FXP_OPENDIR packet.
type OpenDirPacket struct {
Path string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *OpenDirPacket) Type() PacketType {
return PacketTypeOpenDir
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *OpenDirPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Path) // string(path)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeOpenDir, reqid)
buf.AppendString(p.Path)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *OpenDirPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Path, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}

323
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/packets.go generated vendored Normal file
View file

@ -0,0 +1,323 @@
package filexfer
import (
"errors"
"fmt"
"io"
)
// smallBufferSize is an initial allocation minimal capacity.
const smallBufferSize = 64
func newPacketFromType(typ PacketType) (Packet, error) {
switch typ {
case PacketTypeOpen:
return new(OpenPacket), nil
case PacketTypeClose:
return new(ClosePacket), nil
case PacketTypeRead:
return new(ReadPacket), nil
case PacketTypeWrite:
return new(WritePacket), nil
case PacketTypeLStat:
return new(LStatPacket), nil
case PacketTypeFStat:
return new(FStatPacket), nil
case PacketTypeSetstat:
return new(SetstatPacket), nil
case PacketTypeFSetstat:
return new(FSetstatPacket), nil
case PacketTypeOpenDir:
return new(OpenDirPacket), nil
case PacketTypeReadDir:
return new(ReadDirPacket), nil
case PacketTypeRemove:
return new(RemovePacket), nil
case PacketTypeMkdir:
return new(MkdirPacket), nil
case PacketTypeRmdir:
return new(RmdirPacket), nil
case PacketTypeRealPath:
return new(RealPathPacket), nil
case PacketTypeStat:
return new(StatPacket), nil
case PacketTypeRename:
return new(RenamePacket), nil
case PacketTypeReadLink:
return new(ReadLinkPacket), nil
case PacketTypeSymlink:
return new(SymlinkPacket), nil
case PacketTypeExtended:
return new(ExtendedPacket), nil
default:
return nil, fmt.Errorf("unexpected request packet type: %v", typ)
}
}
// RawPacket implements the general packet format from draft-ietf-secsh-filexfer-02
//
// RawPacket is intended for use in clients receiving responses,
// where a response will be expected to be of a limited number of types,
// and unmarshaling unknown/unexpected response packets is unnecessary.
//
// For servers expecting to receive arbitrary request packet types,
// use RequestPacket.
//
// Defined in https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-3
type RawPacket struct {
PacketType PacketType
RequestID uint32
Data Buffer
}
// Type returns the Type field defining the SSH_FXP_xy type for this packet.
func (p *RawPacket) Type() PacketType {
return p.PacketType
}
// Reset clears the pointers and reference-semantic variables of RawPacket,
// releasing underlying resources, and making them and the RawPacket suitable to be reused,
// so long as no other references have been kept.
func (p *RawPacket) Reset() {
p.Data = Buffer{}
}
// MarshalPacket returns p as a two-part binary encoding of p.
//
// The internal p.RequestID is overridden by the reqid argument.
func (p *RawPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
buf = NewMarshalBuffer(0)
}
buf.StartPacket(p.PacketType, reqid)
return buf.Packet(p.Data.Bytes())
}
// MarshalBinary returns p as the binary encoding of p.
//
// This is a convenience implementation primarily intended for tests,
// because it is inefficient with allocations.
func (p *RawPacket) MarshalBinary() ([]byte, error) {
return ComposePacket(p.MarshalPacket(p.RequestID, nil))
}
// UnmarshalFrom decodes a RawPacket from the given Buffer into p.
//
// The Data field will alias the passed in Buffer,
// so the buffer passed in should not be reused before RawPacket.Reset().
func (p *RawPacket) UnmarshalFrom(buf *Buffer) error {
typ, err := buf.ConsumeUint8()
if err != nil {
return err
}
p.PacketType = PacketType(typ)
if p.RequestID, err = buf.ConsumeUint32(); err != nil {
return err
}
p.Data = *buf
return nil
}
// UnmarshalBinary decodes a full raw packet out of the given data.
// It is assumed that the uint32(length) has already been consumed to receive the data.
//
// This is a convenience implementation primarily intended for tests,
// because this must clone the given data byte slice,
// as Data is not allowed to alias any part of the data byte slice.
func (p *RawPacket) UnmarshalBinary(data []byte) error {
clone := make([]byte, len(data))
n := copy(clone, data)
return p.UnmarshalFrom(NewBuffer(clone[:n]))
}
// readPacket reads a uint32 length-prefixed binary data packet from r.
// using the given byte slice as a backing array.
//
// If the packet length read from r is bigger than maxPacketLength,
// or greater than math.MaxInt32 on a 32-bit implementation,
// then a `ErrLongPacket` error will be returned.
//
// If the given byte slice is insufficient to hold the packet,
// then it will be extended to fill the packet size.
func readPacket(r io.Reader, b []byte, maxPacketLength uint32) ([]byte, error) {
if cap(b) < 4 {
// We will need allocate our own buffer just for reading the packet length.
// However, we don’t really want to allocate an extremely narrow buffer (4-bytes),
// and cause unnecessary allocation churn from both length reads and small packet reads,
// so we use smallBufferSize from the bytes package as a reasonable guess.
// But if callers really do want to force narrow throw-away allocation of every packet body,
// they can do so with a buffer of capacity 4.
b = make([]byte, smallBufferSize)
}
if _, err := io.ReadFull(r, b[:4]); err != nil {
return nil, err
}
length := unmarshalUint32(b)
if int(length) < 5 {
// Must have at least uint8(type) and uint32(request-id)
if int(length) < 0 {
// Only possible when strconv.IntSize == 32,
// the packet length is longer than math.MaxInt32,
// and thus longer than any possible slice.
return nil, ErrLongPacket
}
return nil, ErrShortPacket
}
if length > maxPacketLength {
return nil, ErrLongPacket
}
if int(length) > cap(b) {
// We know int(length) must be positive, because of tests above.
b = make([]byte, length)
}
n, err := io.ReadFull(r, b[:length])
return b[:n], err
}
// ReadFrom provides a simple functional packet reader,
// using the given byte slice as a backing array.
//
// To protect against potential denial of service attacks,
// if the read packet length is longer than maxPacketLength,
// then no packet data will be read, and ErrLongPacket will be returned.
// (On 32-bit int architectures, all packets >= 2^31 in length
// will return ErrLongPacket regardless of maxPacketLength.)
//
// If the read packet length is longer than cap(b),
// then a throw-away slice will allocated to meet the exact packet length.
// This can be used to limit the length of reused buffers,
// while still allowing reception of occasional large packets.
//
// The Data field may alias the passed in byte slice,
// so the byte slice passed in should not be reused before RawPacket.Reset().
func (p *RawPacket) ReadFrom(r io.Reader, b []byte, maxPacketLength uint32) error {
b, err := readPacket(r, b, maxPacketLength)
if err != nil {
return err
}
return p.UnmarshalFrom(NewBuffer(b))
}
// RequestPacket implements the general packet format from draft-ietf-secsh-filexfer-02
// but also automatically decode/encodes valid request packets (2 < type < 100 || type == 200).
//
// RequestPacket is intended for use in servers receiving requests,
// where any arbitrary request may be received, and so decoding them automatically
// is useful.
//
// For clients expecting to receive specific response packet types,
// where automatic unmarshaling of the packet body does not make sense,
// use RawPacket.
//
// Defined in https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-3
type RequestPacket struct {
RequestID uint32
Request Packet
}
// Type returns the SSH_FXP_xy value associated with the underlying packet.
func (p *RequestPacket) Type() PacketType {
return p.Request.Type()
}
// Reset clears the pointers and reference-semantic variables in RequestPacket,
// releasing underlying resources, and making them and the RequestPacket suitable to be reused,
// so long as no other references have been kept.
func (p *RequestPacket) Reset() {
p.Request = nil
}
// MarshalPacket returns p as a two-part binary encoding of p.
//
// The internal p.RequestID is overridden by the reqid argument.
func (p *RequestPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
if p.Request == nil {
return nil, nil, errors.New("empty request packet")
}
return p.Request.MarshalPacket(reqid, b)
}
// MarshalBinary returns p as the binary encoding of p.
//
// This is a convenience implementation primarily intended for tests,
// because it is inefficient with allocations.
func (p *RequestPacket) MarshalBinary() ([]byte, error) {
return ComposePacket(p.MarshalPacket(p.RequestID, nil))
}
// UnmarshalFrom decodes a RequestPacket from the given Buffer into p.
//
// The Request field may alias the passed in Buffer, (e.g. SSH_FXP_WRITE),
// so the buffer passed in should not be reused before RequestPacket.Reset().
func (p *RequestPacket) UnmarshalFrom(buf *Buffer) error {
typ, err := buf.ConsumeUint8()
if err != nil {
return err
}
p.Request, err = newPacketFromType(PacketType(typ))
if err != nil {
return err
}
if p.RequestID, err = buf.ConsumeUint32(); err != nil {
return err
}
return p.Request.UnmarshalPacketBody(buf)
}
// UnmarshalBinary decodes a full request packet out of the given data.
// It is assumed that the uint32(length) has already been consumed to receive the data.
//
// This is a convenience implementation primarily intended for tests,
// because this must clone the given data byte slice,
// as Request is not allowed to alias any part of the data byte slice.
func (p *RequestPacket) UnmarshalBinary(data []byte) error {
clone := make([]byte, len(data))
n := copy(clone, data)
return p.UnmarshalFrom(NewBuffer(clone[:n]))
}
// ReadFrom provides a simple functional packet reader,
// using the given byte slice as a backing array.
//
// To protect against potential denial of service attacks,
// if the read packet length is longer than maxPacketLength,
// then no packet data will be read, and ErrLongPacket will be returned.
// (On 32-bit int architectures, all packets >= 2^31 in length
// will return ErrLongPacket regardless of maxPacketLength.)
//
// If the read packet length is longer than cap(b),
// then a throw-away slice will allocated to meet the exact packet length.
// This can be used to limit the length of reused buffers,
// while still allowing reception of occasional large packets.
//
// The Request field may alias the passed in byte slice,
// so the byte slice passed in should not be reused before RawPacket.Reset().
func (p *RequestPacket) ReadFrom(r io.Reader, b []byte, maxPacketLength uint32) error {
b, err := readPacket(r, b, maxPacketLength)
if err != nil {
return err
}
return p.UnmarshalFrom(NewBuffer(b))
}

368
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/path_packets.go generated vendored Normal file
View file

@ -0,0 +1,368 @@
package filexfer
// LStatPacket defines the SSH_FXP_LSTAT packet.
type LStatPacket struct {
Path string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *LStatPacket) Type() PacketType {
return PacketTypeLStat
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *LStatPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Path) // string(path)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeLStat, reqid)
buf.AppendString(p.Path)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *LStatPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Path, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// SetstatPacket defines the SSH_FXP_SETSTAT packet.
type SetstatPacket struct {
Path string
Attrs Attributes
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *SetstatPacket) Type() PacketType {
return PacketTypeSetstat
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *SetstatPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Path) + p.Attrs.Len() // string(path) + ATTRS(attrs)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeSetstat, reqid)
buf.AppendString(p.Path)
p.Attrs.MarshalInto(buf)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *SetstatPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Path, err = buf.ConsumeString(); err != nil {
return err
}
return p.Attrs.UnmarshalFrom(buf)
}
// RemovePacket defines the SSH_FXP_REMOVE packet.
type RemovePacket struct {
Path string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *RemovePacket) Type() PacketType {
return PacketTypeRemove
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *RemovePacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Path) // string(path)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeRemove, reqid)
buf.AppendString(p.Path)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *RemovePacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Path, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// MkdirPacket defines the SSH_FXP_MKDIR packet.
type MkdirPacket struct {
Path string
Attrs Attributes
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *MkdirPacket) Type() PacketType {
return PacketTypeMkdir
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *MkdirPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Path) + p.Attrs.Len() // string(path) + ATTRS(attrs)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeMkdir, reqid)
buf.AppendString(p.Path)
p.Attrs.MarshalInto(buf)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *MkdirPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Path, err = buf.ConsumeString(); err != nil {
return err
}
return p.Attrs.UnmarshalFrom(buf)
}
// RmdirPacket defines the SSH_FXP_RMDIR packet.
type RmdirPacket struct {
Path string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *RmdirPacket) Type() PacketType {
return PacketTypeRmdir
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *RmdirPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Path) // string(path)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeRmdir, reqid)
buf.AppendString(p.Path)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *RmdirPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Path, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// RealPathPacket defines the SSH_FXP_REALPATH packet.
type RealPathPacket struct {
Path string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *RealPathPacket) Type() PacketType {
return PacketTypeRealPath
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *RealPathPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Path) // string(path)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeRealPath, reqid)
buf.AppendString(p.Path)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *RealPathPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Path, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// StatPacket defines the SSH_FXP_STAT packet.
type StatPacket struct {
Path string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *StatPacket) Type() PacketType {
return PacketTypeStat
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *StatPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Path) // string(path)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeStat, reqid)
buf.AppendString(p.Path)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *StatPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Path, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// RenamePacket defines the SSH_FXP_RENAME packet.
type RenamePacket struct {
OldPath string
NewPath string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *RenamePacket) Type() PacketType {
return PacketTypeRename
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *RenamePacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
// string(oldpath) + string(newpath)
size := 4 + len(p.OldPath) + 4 + len(p.NewPath)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeRename, reqid)
buf.AppendString(p.OldPath)
buf.AppendString(p.NewPath)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *RenamePacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.OldPath, err = buf.ConsumeString(); err != nil {
return err
}
if p.NewPath, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// ReadLinkPacket defines the SSH_FXP_READLINK packet.
type ReadLinkPacket struct {
Path string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *ReadLinkPacket) Type() PacketType {
return PacketTypeReadLink
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *ReadLinkPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Path) // string(path)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeReadLink, reqid)
buf.AppendString(p.Path)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *ReadLinkPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Path, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// SymlinkPacket defines the SSH_FXP_SYMLINK packet.
//
// The order of the arguments to the SSH_FXP_SYMLINK method was inadvertently reversed.
// Unfortunately, the reversal was not noticed until the server was widely deployed.
// Covered in Section 3.1 of https://github.com/openssh/openssh-portable/blob/master/PROTOCOL
type SymlinkPacket struct {
LinkPath string
TargetPath string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *SymlinkPacket) Type() PacketType {
return PacketTypeSymlink
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *SymlinkPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
// string(targetpath) + string(linkpath)
size := 4 + len(p.TargetPath) + 4 + len(p.LinkPath)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeSymlink, reqid)
// Arguments were inadvertently reversed.
buf.AppendString(p.TargetPath)
buf.AppendString(p.LinkPath)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *SymlinkPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
// Arguments were inadvertently reversed.
if p.TargetPath, err = buf.ConsumeString(); err != nil {
return err
}
if p.LinkPath, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}

114
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/permissions.go generated vendored Normal file
View file

@ -0,0 +1,114 @@
package filexfer
// FileMode represents a file’s mode and permission bits.
// The bits are defined according to POSIX standards,
// and may not apply to the OS being built for.
type FileMode uint32
// Permission flags, defined here to avoid potential inconsistencies in individual OS implementations.
const (
ModePerm FileMode = 0o0777 // S_IRWXU | S_IRWXG | S_IRWXO
ModeUserRead FileMode = 0o0400 // S_IRUSR
ModeUserWrite FileMode = 0o0200 // S_IWUSR
ModeUserExec FileMode = 0o0100 // S_IXUSR
ModeGroupRead FileMode = 0o0040 // S_IRGRP
ModeGroupWrite FileMode = 0o0020 // S_IWGRP
ModeGroupExec FileMode = 0o0010 // S_IXGRP
ModeOtherRead FileMode = 0o0004 // S_IROTH
ModeOtherWrite FileMode = 0o0002 // S_IWOTH
ModeOtherExec FileMode = 0o0001 // S_IXOTH
ModeSetUID FileMode = 0o4000 // S_ISUID
ModeSetGID FileMode = 0o2000 // S_ISGID
ModeSticky FileMode = 0o1000 // S_ISVTX
ModeType FileMode = 0xF000 // S_IFMT
ModeNamedPipe FileMode = 0x1000 // S_IFIFO
ModeCharDevice FileMode = 0x2000 // S_IFCHR
ModeDir FileMode = 0x4000 // S_IFDIR
ModeDevice FileMode = 0x6000 // S_IFBLK
ModeRegular FileMode = 0x8000 // S_IFREG
ModeSymlink FileMode = 0xA000 // S_IFLNK
ModeSocket FileMode = 0xC000 // S_IFSOCK
)
// IsDir reports whether m describes a directory.
// That is, it tests for m.Type() == ModeDir.
func (m FileMode) IsDir() bool {
return (m & ModeType) == ModeDir
}
// IsRegular reports whether m describes a regular file.
// That is, it tests for m.Type() == ModeRegular
func (m FileMode) IsRegular() bool {
return (m & ModeType) == ModeRegular
}
// Perm returns the POSIX permission bits in m (m & ModePerm).
func (m FileMode) Perm() FileMode {
return (m & ModePerm)
}
// Type returns the type bits in m (m & ModeType).
func (m FileMode) Type() FileMode {
return (m & ModeType)
}
// String returns a `-rwxrwxrwx` style string representing the `ls -l` POSIX permissions string.
func (m FileMode) String() string {
var buf [10]byte
switch m.Type() {
case ModeRegular:
buf[0] = '-'
case ModeDir:
buf[0] = 'd'
case ModeSymlink:
buf[0] = 'l'
case ModeDevice:
buf[0] = 'b'
case ModeCharDevice:
buf[0] = 'c'
case ModeNamedPipe:
buf[0] = 'p'
case ModeSocket:
buf[0] = 's'
default:
buf[0] = '?'
}
const rwx = "rwxrwxrwx"
for i, c := range rwx {
if m&(1<<uint(9-1-i)) != 0 {
buf[i+1] = byte(c)
} else {
buf[i+1] = '-'
}
}
if m&ModeSetUID != 0 {
if buf[3] == 'x' {
buf[3] = 's'
} else {
buf[3] = 'S'
}
}
if m&ModeSetGID != 0 {
if buf[6] == 'x' {
buf[6] = 's'
} else {
buf[6] = 'S'
}
}
if m&ModeSticky != 0 {
if buf[9] == 'x' {
buf[9] = 't'
} else {
buf[9] = 'T'
}
}
return string(buf[:])
}

243
vendor/github.com/pkg/sftp/internal/encoding/ssh/filexfer/response_packets.go generated vendored Normal file
View file

@ -0,0 +1,243 @@
package filexfer
import (
"fmt"
)
// StatusPacket defines the SSH_FXP_STATUS packet.
//
// Specified in https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-7
type StatusPacket struct {
StatusCode Status
ErrorMessage string
LanguageTag string
}
// Error makes StatusPacket an error type.
func (p *StatusPacket) Error() string {
if p.ErrorMessage == "" {
return "sftp: " + p.StatusCode.String()
}
return fmt.Sprintf("sftp: %q (%s)", p.ErrorMessage, p.StatusCode)
}
// Is returns true if target is a StatusPacket with the same StatusCode,
// or target is a Status code which is the same as SatusCode.
func (p *StatusPacket) Is(target error) bool {
if target, ok := target.(*StatusPacket); ok {
return p.StatusCode == target.StatusCode
}
return p.StatusCode == target
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *StatusPacket) Type() PacketType {
return PacketTypeStatus
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *StatusPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
// uint32(error/status code) + string(error message) + string(language tag)
size := 4 + 4 + len(p.ErrorMessage) + 4 + len(p.LanguageTag)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeStatus, reqid)
buf.AppendUint32(uint32(p.StatusCode))
buf.AppendString(p.ErrorMessage)
buf.AppendString(p.LanguageTag)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *StatusPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
statusCode, err := buf.ConsumeUint32()
if err != nil {
return err
}
p.StatusCode = Status(statusCode)
if p.ErrorMessage, err = buf.ConsumeString(); err != nil {
return err
}
if p.LanguageTag, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// HandlePacket defines the SSH_FXP_HANDLE packet.
type HandlePacket struct {
Handle string
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *HandlePacket) Type() PacketType {
return PacketTypeHandle
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *HandlePacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 + len(p.Handle) // string(handle)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeHandle, reqid)
buf.AppendString(p.Handle)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *HandlePacket) UnmarshalPacketBody(buf *Buffer) (err error) {
if p.Handle, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// DataPacket defines the SSH_FXP_DATA packet.
type DataPacket struct {
Data []byte
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *DataPacket) Type() PacketType {
return PacketTypeData
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *DataPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 // uint32(len(data)); data content in payload
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeData, reqid)
buf.AppendUint32(uint32(len(p.Data)))
return buf.Packet(p.Data)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
//
// If p.Data is already populated, and of sufficient length to hold the data,
// then this will copy the data into that byte slice.
//
// If p.Data has a length insufficient to hold the data,
// then this will make a new slice of sufficient length, and copy the data into that.
//
// This means this _does not_ alias any of the data buffer that is passed in.
func (p *DataPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
data, err := buf.ConsumeByteSlice()
if err != nil {
return err
}
if len(p.Data) < len(data) {
p.Data = make([]byte, len(data))
}
n := copy(p.Data, data)
p.Data = p.Data[:n]
return nil
}
// NamePacket defines the SSH_FXP_NAME packet.
type NamePacket struct {
Entries []*NameEntry
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *NamePacket) Type() PacketType {
return PacketTypeName
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *NamePacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := 4 // uint32(len(entries))
for _, e := range p.Entries {
size += e.Len()
}
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeName, reqid)
buf.AppendUint32(uint32(len(p.Entries)))
for _, e := range p.Entries {
e.MarshalInto(buf)
}
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *NamePacket) UnmarshalPacketBody(buf *Buffer) (err error) {
count, err := buf.ConsumeUint32()
if err != nil {
return err
}
p.Entries = make([]*NameEntry, 0, count)
for i := uint32(0); i < count; i++ {
var e NameEntry
if err := e.UnmarshalFrom(buf); err != nil {
return err
}
p.Entries = append(p.Entries, &e)
}
return nil
}
// AttrsPacket defines the SSH_FXP_ATTRS packet.
type AttrsPacket struct {
Attrs Attributes
}
// Type returns the SSH_FXP_xy value associated with this packet type.
func (p *AttrsPacket) Type() PacketType {
return PacketTypeAttrs
}
// MarshalPacket returns p as a two-part binary encoding of p.
func (p *AttrsPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
buf := NewBuffer(b)
if buf.Cap() < 9 {
size := p.Attrs.Len() // ATTRS(attrs)
buf = NewMarshalBuffer(size)
}
buf.StartPacket(PacketTypeAttrs, reqid)
p.Attrs.MarshalInto(buf)
return buf.Packet(payload)
}
// UnmarshalPacketBody unmarshals the packet body from the given Buffer.
// It is assumed that the uint32(request-id) has already been consumed.
func (p *AttrsPacket) UnmarshalPacketBody(buf *Buffer) (err error) {
return p.Attrs.UnmarshalFrom(buf)
}

81
vendor/github.com/pkg/sftp/ls_formatting.go generated vendored Normal file
View file

@ -0,0 +1,81 @@
package sftp
import (
"errors"
"fmt"
"os"
"os/user"
"strconv"
"time"
sshfx "github.com/pkg/sftp/internal/encoding/ssh/filexfer"
)
func lsFormatID(id uint32) string {
return strconv.FormatUint(uint64(id), 10)
}
type osIDLookup struct{}
func (osIDLookup) Filelist(*Request) (ListerAt, error) {
return nil, errors.New("unimplemented stub")
}
func (osIDLookup) LookupUserName(uid string) string {
u, err := user.LookupId(uid)
if err != nil {
return uid
}
return u.Username
}
func (osIDLookup) LookupGroupName(gid string) string {
g, err := user.LookupGroupId(gid)
if err != nil {
return gid
}
return g.Name
}
// runLs formats the FileInfo as per `ls -l` style, which is in the 'longname' field of a SSH_FXP_NAME entry.
// This is a fairly simple implementation, just enough to look close to openssh in simple cases.
func runLs(idLookup NameLookupFileLister, dirent os.FileInfo) string {
// example from openssh sftp server:
// crw-rw-rw- 1 root wheel 0 Jul 31 20:52 ttyvd
// format:
// {directory / char device / etc}{rwxrwxrwx} {number of links} owner group size month day [time (this year) | year (otherwise)] name
symPerms := sshfx.FileMode(fromFileMode(dirent.Mode())).String()
var numLinks uint64 = 1
uid, gid := "0", "0"
switch sys := dirent.Sys().(type) {
case *sshfx.Attributes:
uid = lsFormatID(sys.UID)
gid = lsFormatID(sys.GID)
case *FileStat:
uid = lsFormatID(sys.UID)
gid = lsFormatID(sys.GID)
default:
numLinks, uid, gid = lsLinksUIDGID(dirent)
}
if idLookup != nil {
uid, gid = idLookup.LookupUserName(uid), idLookup.LookupGroupName(gid)
}
mtime := dirent.ModTime()
date := mtime.Format("Jan 2")
var yearOrTime string
if mtime.Before(time.Now().AddDate(0, -6, 0)) {
yearOrTime = mtime.Format("2006")
} else {
yearOrTime = mtime.Format("15:04")
}
return fmt.Sprintf("%s %4d %-8s %-8s %8d %s %5s %s", symPerms, numLinks, uid, gid, dirent.Size(), date, yearOrTime, dirent.Name())
}

21
vendor/github.com/pkg/sftp/ls_plan9.go generated vendored Normal file
View file

@ -0,0 +1,21 @@
// +build plan9
package sftp
import (
"os"
"syscall"
)
func lsLinksUIDGID(fi os.FileInfo) (numLinks uint64, uid, gid string) {
numLinks = 1
uid, gid = "0", "0"
switch sys := fi.Sys().(type) {
case *syscall.Dir:
uid = sys.Uid
gid = sys.Gid
}
return numLinks, uid, gid
}

11
vendor/github.com/pkg/sftp/ls_stub.go generated vendored Normal file
View file

@ -0,0 +1,11 @@
// +build windows android
package sftp
import (
"os"
)
func lsLinksUIDGID(fi os.FileInfo) (numLinks uint64, uid, gid string) {
return 1, "0", "0"
}

23
vendor/github.com/pkg/sftp/ls_unix.go generated vendored Normal file
View file

@ -0,0 +1,23 @@
// +build aix darwin dragonfly freebsd !android,linux netbsd openbsd solaris js
package sftp
import (
"os"
"syscall"
)
func lsLinksUIDGID(fi os.FileInfo) (numLinks uint64, uid, gid string) {
numLinks = 1
uid, gid = "0", "0"
switch sys := fi.Sys().(type) {
case *syscall.Stat_t:
numLinks = uint64(sys.Nlink)
uid = lsFormatID(sys.Uid)
gid = lsFormatID(sys.Gid)
default:
}
return numLinks, uid, gid
}

137
vendor/github.com/pkg/sftp/match.go generated vendored Normal file
View file

@ -0,0 +1,137 @@
package sftp
import (
"path"
"strings"
)
// ErrBadPattern indicates a globbing pattern was malformed.
var ErrBadPattern = path.ErrBadPattern
// Match reports whether name matches the shell pattern.
//
// This is an alias for path.Match from the standard library,
// offered so that callers need not import the path package.
// For details, see https://golang.org/pkg/path/#Match.
func Match(pattern, name string) (matched bool, err error) {
return path.Match(pattern, name)
}
// detect if byte(char) is path separator
func isPathSeparator(c byte) bool {
return c == '/'
}
// Split splits the path p immediately following the final slash,
// separating it into a directory and file name component.
//
// This is an alias for path.Split from the standard library,
// offered so that callers need not import the path package.
// For details, see https://golang.org/pkg/path/#Split.
func Split(p string) (dir, file string) {
return path.Split(p)
}
// Glob returns the names of all files matching pattern or nil
// if there is no matching file. The syntax of patterns is the same
// as in Match. The pattern may describe hierarchical names such as
// /usr/*/bin/ed.
//
// Glob ignores file system errors such as I/O errors reading directories.
// The only possible returned error is ErrBadPattern, when pattern
// is malformed.
func (c *Client) Glob(pattern string) (matches []string, err error) {
if !hasMeta(pattern) {
file, err := c.Lstat(pattern)
if err != nil {
return nil, nil
}
dir, _ := Split(pattern)
dir = cleanGlobPath(dir)
return []string{Join(dir, file.Name())}, nil
}
dir, file := Split(pattern)
dir = cleanGlobPath(dir)
if !hasMeta(dir) {
return c.glob(dir, file, nil)
}
// Prevent infinite recursion. See issue 15879.
if dir == pattern {
return nil, ErrBadPattern
}
var m []string
m, err = c.Glob(dir)
if err != nil {
return
}
for _, d := range m {
matches, err = c.glob(d, file, matches)
if err != nil {
return
}
}
return
}
// cleanGlobPath prepares path for glob matching.
func cleanGlobPath(path string) string {
switch path {
case "":
return "."
case "/":
return path
default:
return path[0 : len(path)-1] // chop off trailing separator
}
}
// glob searches for files matching pattern in the directory dir
// and appends them to matches. If the directory cannot be
// opened, it returns the existing matches. New matches are
// added in lexicographical order.
func (c *Client) glob(dir, pattern string, matches []string) (m []string, e error) {
m = matches
fi, err := c.Stat(dir)
if err != nil {
return
}
if !fi.IsDir() {
return
}
names, err := c.ReadDir(dir)
if err != nil {
return
}
//sort.Strings(names)
for _, n := range names {
matched, err := Match(pattern, n.Name())
if err != nil {
return m, err
}
if matched {
m = append(m, Join(dir, n.Name()))
}
}
return
}
// Join joins any number of path elements into a single path, separating
// them with slashes.
//
// This is an alias for path.Join from the standard library,
// offered so that callers need not import the path package.
// For details, see https://golang.org/pkg/path/#Join.
func Join(elem ...string) string {
return path.Join(elem...)
}
// hasMeta reports whether path contains any of the magic characters
// recognized by Match.
func hasMeta(path string) bool {
return strings.ContainsAny(path, "\\*?[")
}

216
vendor/github.com/pkg/sftp/packet-manager.go generated vendored Normal file
View file

@ -0,0 +1,216 @@
package sftp
import (
"encoding"
"sort"
"sync"
)
// The goal of the packetManager is to keep the outgoing packets in the same
// order as the incoming as is requires by section 7 of the RFC.
type packetManager struct {
requests chan orderedPacket
responses chan orderedPacket
fini chan struct{}
incoming orderedPackets
outgoing orderedPackets
sender packetSender // connection object
working *sync.WaitGroup
packetCount uint32
// it is not nil if the allocator is enabled
alloc *allocator
}
type packetSender interface {
sendPacket(encoding.BinaryMarshaler) error
}
func newPktMgr(sender packetSender) *packetManager {
s := &packetManager{
requests: make(chan orderedPacket, SftpServerWorkerCount),
responses: make(chan orderedPacket, SftpServerWorkerCount),
fini: make(chan struct{}),
incoming: make([]orderedPacket, 0, SftpServerWorkerCount),
outgoing: make([]orderedPacket, 0, SftpServerWorkerCount),
sender: sender,
working: &sync.WaitGroup{},
}
go s.controller()
return s
}
//// packet ordering
func (s *packetManager) newOrderID() uint32 {
s.packetCount++
return s.packetCount
}
// returns the next orderID without incrementing it.
// This is used before receiving a new packet, with the allocator enabled, to associate
// the slice allocated for the received packet with the orderID that will be used to mark
// the allocated slices for reuse once the request is served
func (s *packetManager) getNextOrderID() uint32 {
return s.packetCount + 1
}
type orderedRequest struct {
requestPacket
orderid uint32
}
func (s *packetManager) newOrderedRequest(p requestPacket) orderedRequest {
return orderedRequest{requestPacket: p, orderid: s.newOrderID()}
}
func (p orderedRequest) orderID() uint32 { return p.orderid }
func (p orderedRequest) setOrderID(oid uint32) { p.orderid = oid }
type orderedResponse struct {
responsePacket
orderid uint32
}
func (s *packetManager) newOrderedResponse(p responsePacket, id uint32,
) orderedResponse {
return orderedResponse{responsePacket: p, orderid: id}
}
func (p orderedResponse) orderID() uint32 { return p.orderid }
func (p orderedResponse) setOrderID(oid uint32) { p.orderid = oid }
type orderedPacket interface {
id() uint32
orderID() uint32
}
type orderedPackets []orderedPacket
func (o orderedPackets) Sort() {
sort.Slice(o, func(i, j int) bool {
return o[i].orderID() < o[j].orderID()
})
}
//// packet registry
// register incoming packets to be handled
func (s *packetManager) incomingPacket(pkt orderedRequest) {
s.working.Add(1)
s.requests <- pkt
}
// register outgoing packets as being ready
func (s *packetManager) readyPacket(pkt orderedResponse) {
s.responses <- pkt
s.working.Done()
}
// shut down packetManager controller
func (s *packetManager) close() {
// pause until current packets are processed
s.working.Wait()
close(s.fini)
}
// Passed a worker function, returns a channel for incoming packets.
// Keep process packet responses in the order they are received while
// maximizing throughput of file transfers.
func (s *packetManager) workerChan(runWorker func(chan orderedRequest),
) chan orderedRequest {
// multiple workers for faster read/writes
rwChan := make(chan orderedRequest, SftpServerWorkerCount)
for i := 0; i < SftpServerWorkerCount; i++ {
runWorker(rwChan)
}
// single worker to enforce sequential processing of everything else
cmdChan := make(chan orderedRequest)
runWorker(cmdChan)
pktChan := make(chan orderedRequest, SftpServerWorkerCount)
go func() {
for pkt := range pktChan {
switch pkt.requestPacket.(type) {
case *sshFxpReadPacket, *sshFxpWritePacket:
s.incomingPacket(pkt)
rwChan <- pkt
continue
case *sshFxpClosePacket:
// wait for reads/writes to finish when file is closed
// incomingPacket() call must occur after this
s.working.Wait()
}
s.incomingPacket(pkt)
// all non-RW use sequential cmdChan
cmdChan <- pkt
}
close(rwChan)
close(cmdChan)
s.close()
}()
return pktChan
}
// process packets
func (s *packetManager) controller() {
for {
select {
case pkt := <-s.requests:
debug("incoming id (oid): %v (%v)", pkt.id(), pkt.orderID())
s.incoming = append(s.incoming, pkt)
s.incoming.Sort()
case pkt := <-s.responses:
debug("outgoing id (oid): %v (%v)", pkt.id(), pkt.orderID())
s.outgoing = append(s.outgoing, pkt)
s.outgoing.Sort()
case <-s.fini:
return
}
s.maybeSendPackets()
}
}
// send as many packets as are ready
func (s *packetManager) maybeSendPackets() {
for {
if len(s.outgoing) == 0 || len(s.incoming) == 0 {
debug("break! -- outgoing: %v; incoming: %v",
len(s.outgoing), len(s.incoming))
break
}
out := s.outgoing[0]
in := s.incoming[0]
// debug("incoming: %v", ids(s.incoming))
// debug("outgoing: %v", ids(s.outgoing))
if in.orderID() == out.orderID() {
debug("Sending packet: %v", out.id())
s.sender.sendPacket(out.(encoding.BinaryMarshaler))
if s.alloc != nil {
// mark for reuse the slices allocated for this request
s.alloc.ReleasePages(in.orderID())
}
// pop off heads
copy(s.incoming, s.incoming[1:]) // shift left
s.incoming[len(s.incoming)-1] = nil // clear last
s.incoming = s.incoming[:len(s.incoming)-1] // remove last
copy(s.outgoing, s.outgoing[1:]) // shift left
s.outgoing[len(s.outgoing)-1] = nil // clear last
s.outgoing = s.outgoing[:len(s.outgoing)-1] // remove last
} else {
break
}
}
}
// func oids(o []orderedPacket) []uint32 {
// res := make([]uint32, 0, len(o))
// for _, v := range o {
// res = append(res, v.orderId())
// }
// return res
// }
// func ids(o []orderedPacket) []uint32 {
// res := make([]uint32, 0, len(o))
// for _, v := range o {
// res = append(res, v.id())
// }
// return res
// }

135
vendor/github.com/pkg/sftp/packet-typing.go generated vendored Normal file
View file

@ -0,0 +1,135 @@
package sftp
import (
"encoding"
"fmt"
)
// all incoming packets
type requestPacket interface {
encoding.BinaryUnmarshaler
id() uint32
}
type responsePacket interface {
encoding.BinaryMarshaler
id() uint32
}
// interfaces to group types
type hasPath interface {
requestPacket
getPath() string
}
type hasHandle interface {
requestPacket
getHandle() string
}
type notReadOnly interface {
notReadOnly()
}
//// define types by adding methods
// hasPath
func (p *sshFxpLstatPacket) getPath() string { return p.Path }
func (p *sshFxpStatPacket) getPath() string { return p.Path }
func (p *sshFxpRmdirPacket) getPath() string { return p.Path }
func (p *sshFxpReadlinkPacket) getPath() string { return p.Path }
func (p *sshFxpRealpathPacket) getPath() string { return p.Path }
func (p *sshFxpMkdirPacket) getPath() string { return p.Path }
func (p *sshFxpSetstatPacket) getPath() string { return p.Path }
func (p *sshFxpStatvfsPacket) getPath() string { return p.Path }
func (p *sshFxpRemovePacket) getPath() string { return p.Filename }
func (p *sshFxpRenamePacket) getPath() string { return p.Oldpath }
func (p *sshFxpSymlinkPacket) getPath() string { return p.Targetpath }
func (p *sshFxpOpendirPacket) getPath() string { return p.Path }
func (p *sshFxpOpenPacket) getPath() string { return p.Path }
func (p *sshFxpExtendedPacketPosixRename) getPath() string { return p.Oldpath }
func (p *sshFxpExtendedPacketHardlink) getPath() string { return p.Oldpath }
// getHandle
func (p *sshFxpFstatPacket) getHandle() string { return p.Handle }
func (p *sshFxpFsetstatPacket) getHandle() string { return p.Handle }
func (p *sshFxpReadPacket) getHandle() string { return p.Handle }
func (p *sshFxpWritePacket) getHandle() string { return p.Handle }
func (p *sshFxpReaddirPacket) getHandle() string { return p.Handle }
func (p *sshFxpClosePacket) getHandle() string { return p.Handle }
// notReadOnly
func (p *sshFxpWritePacket) notReadOnly() {}
func (p *sshFxpSetstatPacket) notReadOnly() {}
func (p *sshFxpFsetstatPacket) notReadOnly() {}
func (p *sshFxpRemovePacket) notReadOnly() {}
func (p *sshFxpMkdirPacket) notReadOnly() {}
func (p *sshFxpRmdirPacket) notReadOnly() {}
func (p *sshFxpRenamePacket) notReadOnly() {}
func (p *sshFxpSymlinkPacket) notReadOnly() {}
func (p *sshFxpExtendedPacketPosixRename) notReadOnly() {}
func (p *sshFxpExtendedPacketHardlink) notReadOnly() {}
// some packets with ID are missing id()
func (p *sshFxpDataPacket) id() uint32 { return p.ID }
func (p *sshFxpStatusPacket) id() uint32 { return p.ID }
func (p *sshFxpStatResponse) id() uint32 { return p.ID }
func (p *sshFxpNamePacket) id() uint32 { return p.ID }
func (p *sshFxpHandlePacket) id() uint32 { return p.ID }
func (p *StatVFS) id() uint32 { return p.ID }
func (p *sshFxVersionPacket) id() uint32 { return 0 }
// take raw incoming packet data and build packet objects
func makePacket(p rxPacket) (requestPacket, error) {
var pkt requestPacket
switch p.pktType {
case sshFxpInit:
pkt = &sshFxInitPacket{}
case sshFxpLstat:
pkt = &sshFxpLstatPacket{}
case sshFxpOpen:
pkt = &sshFxpOpenPacket{}
case sshFxpClose:
pkt = &sshFxpClosePacket{}
case sshFxpRead:
pkt = &sshFxpReadPacket{}
case sshFxpWrite:
pkt = &sshFxpWritePacket{}
case sshFxpFstat:
pkt = &sshFxpFstatPacket{}
case sshFxpSetstat:
pkt = &sshFxpSetstatPacket{}
case sshFxpFsetstat:
pkt = &sshFxpFsetstatPacket{}
case sshFxpOpendir:
pkt = &sshFxpOpendirPacket{}
case sshFxpReaddir:
pkt = &sshFxpReaddirPacket{}
case sshFxpRemove:
pkt = &sshFxpRemovePacket{}
case sshFxpMkdir:
pkt = &sshFxpMkdirPacket{}
case sshFxpRmdir:
pkt = &sshFxpRmdirPacket{}
case sshFxpRealpath:
pkt = &sshFxpRealpathPacket{}
case sshFxpStat:
pkt = &sshFxpStatPacket{}
case sshFxpRename:
pkt = &sshFxpRenamePacket{}
case sshFxpReadlink:
pkt = &sshFxpReadlinkPacket{}
case sshFxpSymlink:
pkt = &sshFxpSymlinkPacket{}
case sshFxpExtended:
pkt = &sshFxpExtendedPacket{}
default:
return nil, fmt.Errorf("unhandled packet type: %s", p.pktType)
}
if err := pkt.UnmarshalBinary(p.pktBytes); err != nil {
// Return partially unpacked packet to allow callers to return
// error messages appropriately with necessary id() method.
return pkt, err
}
return pkt, nil
}

1276
vendor/github.com/pkg/sftp/packet.go generated vendored Normal file
View file

File diff suppressed because it is too large Load diff

79
vendor/github.com/pkg/sftp/pool.go generated vendored Normal file
View file

@ -0,0 +1,79 @@
package sftp
// bufPool provides a pool of byte-slices to be reused in various parts of the package.
// It is safe to use concurrently through a pointer.
type bufPool struct {
ch chan []byte
blen int
}
func newBufPool(depth, bufLen int) *bufPool {
return &bufPool{
ch: make(chan []byte, depth),
blen: bufLen,
}
}
func (p *bufPool) Get() []byte {
if p.blen <= 0 {
panic("bufPool: new buffer creation length must be greater than zero")
}
for {
select {
case b := <-p.ch:
if cap(b) < p.blen {
// just in case: throw away any buffer with insufficient capacity.
continue
}
return b[:p.blen]
default:
return make([]byte, p.blen)
}
}
}
func (p *bufPool) Put(b []byte) {
if p == nil {
// functional default: no reuse.
return
}
if cap(b) < p.blen || cap(b) > p.blen*2 {
// DO NOT reuse buffers with insufficient capacity.
// This could cause panics when resizing to p.blen.
// DO NOT reuse buffers with excessive capacity.
// This could cause memory leaks.
return
}
select {
case p.ch <- b:
default:
}
}
type resChanPool chan chan result
func newResChanPool(depth int) resChanPool {
return make(chan chan result, depth)
}
func (p resChanPool) Get() chan result {
select {
case ch := <-p:
return ch
default:
return make(chan result, 1)
}
}
func (p resChanPool) Put(ch chan result) {
select {
case p <- ch:
default:
}
}

5
vendor/github.com/pkg/sftp/release.go generated vendored Normal file
View file

@ -0,0 +1,5 @@
// +build !debug
package sftp
func debug(fmt string, args ...interface{}) {}

63
vendor/github.com/pkg/sftp/request-attrs.go generated vendored Normal file
View file

@ -0,0 +1,63 @@
package sftp
// Methods on the Request object to make working with the Flags bitmasks and
// Attr(ibutes) byte blob easier. Use Pflags() when working with an Open/Write
// request and AttrFlags() and Attributes() when working with SetStat requests.
import "os"
// FileOpenFlags defines Open and Write Flags. Correlate directly with with os.OpenFile flags
// (https://golang.org/pkg/os/#pkg-constants).
type FileOpenFlags struct {
Read, Write, Append, Creat, Trunc, Excl bool
}
func newFileOpenFlags(flags uint32) FileOpenFlags {
return FileOpenFlags{
Read: flags&sshFxfRead != 0,
Write: flags&sshFxfWrite != 0,
Append: flags&sshFxfAppend != 0,
Creat: flags&sshFxfCreat != 0,
Trunc: flags&sshFxfTrunc != 0,
Excl: flags&sshFxfExcl != 0,
}
}
// Pflags converts the bitmap/uint32 from SFTP Open packet pflag values,
// into a FileOpenFlags struct with booleans set for flags set in bitmap.
func (r *Request) Pflags() FileOpenFlags {
return newFileOpenFlags(r.Flags)
}
// FileAttrFlags that indicate whether SFTP file attributes were passed. When a flag is
// true the corresponding attribute should be available from the FileStat
// object returned by Attributes method. Used with SetStat.
type FileAttrFlags struct {
Size, UidGid, Permissions, Acmodtime bool
}
func newFileAttrFlags(flags uint32) FileAttrFlags {
return FileAttrFlags{
Size: (flags & sshFileXferAttrSize) != 0,
UidGid: (flags & sshFileXferAttrUIDGID) != 0,
Permissions: (flags & sshFileXferAttrPermissions) != 0,
Acmodtime: (flags & sshFileXferAttrACmodTime) != 0,
}
}
// AttrFlags returns a FileAttrFlags boolean struct based on the
// bitmap/uint32 file attribute flags from the SFTP packaet.
func (r *Request) AttrFlags() FileAttrFlags {
return newFileAttrFlags(r.Flags)
}
// FileMode returns the Mode SFTP file attributes wrapped as os.FileMode
func (a FileStat) FileMode() os.FileMode {
return os.FileMode(a.Mode)
}
// Attributes parses file attributes byte blob and return them in a
// FileStat object.
func (r *Request) Attributes() *FileStat {
fs, _ := unmarshalFileStat(r.Flags, r.Attrs)
return fs
}

54
vendor/github.com/pkg/sftp/request-errors.go generated vendored Normal file
View file

@ -0,0 +1,54 @@
package sftp
type fxerr uint32
// Error types that match the SFTP's SSH_FXP_STATUS codes. Gives you more
// direct control of the errors being sent vs. letting the library work them
// out from the standard os/io errors.
const (
ErrSSHFxOk = fxerr(sshFxOk)
ErrSSHFxEOF = fxerr(sshFxEOF)
ErrSSHFxNoSuchFile = fxerr(sshFxNoSuchFile)
ErrSSHFxPermissionDenied = fxerr(sshFxPermissionDenied)
ErrSSHFxFailure = fxerr(sshFxFailure)
ErrSSHFxBadMessage = fxerr(sshFxBadMessage)
ErrSSHFxNoConnection = fxerr(sshFxNoConnection)
ErrSSHFxConnectionLost = fxerr(sshFxConnectionLost)
ErrSSHFxOpUnsupported = fxerr(sshFxOPUnsupported)
)
// Deprecated error types, these are aliases for the new ones, please use the new ones directly
const (
ErrSshFxOk = ErrSSHFxOk
ErrSshFxEof = ErrSSHFxEOF
ErrSshFxNoSuchFile = ErrSSHFxNoSuchFile
ErrSshFxPermissionDenied = ErrSSHFxPermissionDenied
ErrSshFxFailure = ErrSSHFxFailure
ErrSshFxBadMessage = ErrSSHFxBadMessage
ErrSshFxNoConnection = ErrSSHFxNoConnection
ErrSshFxConnectionLost = ErrSSHFxConnectionLost
ErrSshFxOpUnsupported = ErrSSHFxOpUnsupported
)
func (e fxerr) Error() string {
switch e {
case ErrSSHFxOk:
return "OK"
case ErrSSHFxEOF:
return "EOF"
case ErrSSHFxNoSuchFile:
return "no such file"
case ErrSSHFxPermissionDenied:
return "permission denied"
case ErrSSHFxBadMessage:
return "bad message"
case ErrSSHFxNoConnection:
return "no connection"
case ErrSSHFxConnectionLost:
return "connection lost"
case ErrSSHFxOpUnsupported:
return "operation unsupported"
default:
return "failure"
}
}

666
vendor/github.com/pkg/sftp/request-example.go generated vendored Normal file
View file

@ -0,0 +1,666 @@
package sftp
// This serves as an example of how to implement the request server handler as
// well as a dummy backend for testing. It implements an in-memory backend that
// works as a very simple filesystem with simple flat key-value lookup system.
import (
"errors"
"io"
"os"
"path"
"sort"
"strings"
"sync"
"syscall"
"time"
)
const maxSymlinkFollows = 5
var errTooManySymlinks = errors.New("too many symbolic links")
// InMemHandler returns a Hanlders object with the test handlers.
func InMemHandler() Handlers {
root := &root{
rootFile: &memFile{name: "/", modtime: time.Now(), isdir: true},
files: make(map[string]*memFile),
}
return Handlers{root, root, root, root}
}
// Example Handlers
func (fs *root) Fileread(r *Request) (io.ReaderAt, error) {
flags := r.Pflags()
if !flags.Read {
// sanity check
return nil, os.ErrInvalid
}
return fs.OpenFile(r)
}
func (fs *root) Filewrite(r *Request) (io.WriterAt, error) {
flags := r.Pflags()
if !flags.Write {
// sanity check
return nil, os.ErrInvalid
}
return fs.OpenFile(r)
}
func (fs *root) OpenFile(r *Request) (WriterAtReaderAt, error) {
if fs.mockErr != nil {
return nil, fs.mockErr
}
_ = r.WithContext(r.Context()) // initialize context for deadlock testing
fs.mu.Lock()
defer fs.mu.Unlock()
return fs.openfile(r.Filepath, r.Flags)
}
func (fs *root) putfile(pathname string, file *memFile) error {
pathname, err := fs.canonName(pathname)
if err != nil {
return err
}
if !strings.HasPrefix(pathname, "/") {
return os.ErrInvalid
}
if _, err := fs.lfetch(pathname); err != os.ErrNotExist {
return os.ErrExist
}
file.name = pathname
fs.files[pathname] = file
return nil
}
func (fs *root) openfile(pathname string, flags uint32) (*memFile, error) {
pflags := newFileOpenFlags(flags)
file, err := fs.fetch(pathname)
if err == os.ErrNotExist {
if !pflags.Creat {
return nil, os.ErrNotExist
}
var count int
// You can create files through dangling symlinks.
link, err := fs.lfetch(pathname)
for err == nil && link.symlink != "" {
if pflags.Excl {
// unless you also passed in O_EXCL
return nil, os.ErrInvalid
}
if count++; count > maxSymlinkFollows {
return nil, errTooManySymlinks
}
pathname = link.symlink
link, err = fs.lfetch(pathname)
}
file := &memFile{
modtime: time.Now(),
}
if err := fs.putfile(pathname, file); err != nil {
return nil, err
}
return file, nil
}
if err != nil {
return nil, err
}
if pflags.Creat && pflags.Excl {
return nil, os.ErrExist
}
if file.IsDir() {
return nil, os.ErrInvalid
}
if pflags.Trunc {
if err := file.Truncate(0); err != nil {
return nil, err
}
}
return file, nil
}
func (fs *root) Filecmd(r *Request) error {
if fs.mockErr != nil {
return fs.mockErr
}
_ = r.WithContext(r.Context()) // initialize context for deadlock testing
fs.mu.Lock()
defer fs.mu.Unlock()
switch r.Method {
case "Setstat":
file, err := fs.openfile(r.Filepath, sshFxfWrite)
if err != nil {
return err
}
if r.AttrFlags().Size {
return file.Truncate(int64(r.Attributes().Size))
}
return nil
case "Rename":
// SFTP-v2: "It is an error if there already exists a file with the name specified by newpath."
// This varies from the POSIX specification, which allows limited replacement of target files.
if fs.exists(r.Target) {
return os.ErrExist
}
return fs.rename(r.Filepath, r.Target)
case "Rmdir":
return fs.rmdir(r.Filepath)
case "Remove":
// IEEE 1003.1 remove explicitly can unlink files and remove empty directories.
// We use instead here the semantics of unlink, which is allowed to be restricted against directories.
return fs.unlink(r.Filepath)
case "Mkdir":
return fs.mkdir(r.Filepath)
case "Link":
return fs.link(r.Filepath, r.Target)
case "Symlink":
// NOTE: r.Filepath is the target, and r.Target is the linkpath.
return fs.symlink(r.Filepath, r.Target)
}
return errors.New("unsupported")
}
func (fs *root) rename(oldpath, newpath string) error {
file, err := fs.lfetch(oldpath)
if err != nil {
return err
}
newpath, err = fs.canonName(newpath)
if err != nil {
return err
}
if !strings.HasPrefix(newpath, "/") {
return os.ErrInvalid
}
target, err := fs.lfetch(newpath)
if err != os.ErrNotExist {
if target == file {
// IEEE 1003.1: if oldpath and newpath are the same directory entry,
// then return no error, and perform no further action.
return nil
}
switch {
case file.IsDir():
// IEEE 1003.1: if oldpath is a directory, and newpath exists,
// then newpath must be a directory, and empty.
// It is to be removed prior to rename.
if err := fs.rmdir(newpath); err != nil {
return err
}
case target.IsDir():
// IEEE 1003.1: if oldpath is not a directory, and newpath exists,
// then newpath may not be a directory.
return syscall.EISDIR
}
}
fs.files[newpath] = file
if file.IsDir() {
dirprefix := file.name + "/"
for name, file := range fs.files {
if strings.HasPrefix(name, dirprefix) {
newname := path.Join(newpath, strings.TrimPrefix(name, dirprefix))
fs.files[newname] = file
file.name = newname
delete(fs.files, name)
}
}
}
file.name = newpath
delete(fs.files, oldpath)
return nil
}
func (fs *root) PosixRename(r *Request) error {
if fs.mockErr != nil {
return fs.mockErr
}
_ = r.WithContext(r.Context()) // initialize context for deadlock testing
fs.mu.Lock()
defer fs.mu.Unlock()
return fs.rename(r.Filepath, r.Target)
}
func (fs *root) StatVFS(r *Request) (*StatVFS, error) {
if fs.mockErr != nil {
return nil, fs.mockErr
}
return getStatVFSForPath(r.Filepath)
}
func (fs *root) mkdir(pathname string) error {
dir := &memFile{
modtime: time.Now(),
isdir: true,
}
return fs.putfile(pathname, dir)
}
func (fs *root) rmdir(pathname string) error {
// IEEE 1003.1: If pathname is a symlink, then rmdir should fail with ENOTDIR.
dir, err := fs.lfetch(pathname)
if err != nil {
return err
}
if !dir.IsDir() {
return syscall.ENOTDIR
}
// use the dir‘s internal name not the pathname we passed in.
// the dir.name is always the canonical name of a directory.
pathname = dir.name
for name := range fs.files {
if path.Dir(name) == pathname {
return errors.New("directory not empty")
}
}
delete(fs.files, pathname)
return nil
}
func (fs *root) link(oldpath, newpath string) error {
file, err := fs.lfetch(oldpath)
if err != nil {
return err
}
if file.IsDir() {
return errors.New("hard link not allowed for directory")
}
return fs.putfile(newpath, file)
}
// symlink() creates a symbolic link named `linkpath` which contains the string `target`.
// NOTE! This would be called with `symlink(req.Filepath, req.Target)` due to different semantics.
func (fs *root) symlink(target, linkpath string) error {
link := &memFile{
modtime: time.Now(),
symlink: target,
}
return fs.putfile(linkpath, link)
}
func (fs *root) unlink(pathname string) error {
// does not follow symlinks!
file, err := fs.lfetch(pathname)
if err != nil {
return err
}
if file.IsDir() {
// IEEE 1003.1: implementations may opt out of allowing the unlinking of directories.
// SFTP-v2: SSH_FXP_REMOVE may not remove directories.
return os.ErrInvalid
}
// DO NOT use the file’s internal name.
// because of hard-links files cannot have a single canonical name.
delete(fs.files, pathname)
return nil
}
type listerat []os.FileInfo
// Modeled after strings.Reader's ReadAt() implementation
func (f listerat) ListAt(ls []os.FileInfo, offset int64) (int, error) {
var n int
if offset >= int64(len(f)) {
return 0, io.EOF
}
n = copy(ls, f[offset:])
if n < len(ls) {
return n, io.EOF
}
return n, nil
}
func (fs *root) Filelist(r *Request) (ListerAt, error) {
if fs.mockErr != nil {
return nil, fs.mockErr
}
_ = r.WithContext(r.Context()) // initialize context for deadlock testing
fs.mu.Lock()
defer fs.mu.Unlock()
switch r.Method {
case "List":
files, err := fs.readdir(r.Filepath)
if err != nil {
return nil, err
}
return listerat(files), nil
case "Stat":
file, err := fs.fetch(r.Filepath)
if err != nil {
return nil, err
}
return listerat{file}, nil
case "Readlink":
symlink, err := fs.readlink(r.Filepath)
if err != nil {
return nil, err
}
// SFTP-v2: The server will respond with a SSH_FXP_NAME packet containing only
// one name and a dummy attributes value.
return listerat{
&memFile{
name: symlink,
err: os.ErrNotExist, // prevent accidental use as a reader/writer.
},
}, nil
}
return nil, errors.New("unsupported")
}
func (fs *root) readdir(pathname string) ([]os.FileInfo, error) {
dir, err := fs.fetch(pathname)
if err != nil {
return nil, err
}
if !dir.IsDir() {
return nil, syscall.ENOTDIR
}
var files []os.FileInfo
for name, file := range fs.files {
if path.Dir(name) == dir.name {
files = append(files, file)
}
}
sort.Slice(files, func(i, j int) bool { return files[i].Name() < files[j].Name() })
return files, nil
}
func (fs *root) readlink(pathname string) (string, error) {
file, err := fs.lfetch(pathname)
if err != nil {
return "", err
}
if file.symlink == "" {
return "", os.ErrInvalid
}
return file.symlink, nil
}
// implements LstatFileLister interface
func (fs *root) Lstat(r *Request) (ListerAt, error) {
if fs.mockErr != nil {
return nil, fs.mockErr
}
_ = r.WithContext(r.Context()) // initialize context for deadlock testing
fs.mu.Lock()
defer fs.mu.Unlock()
file, err := fs.lfetch(r.Filepath)
if err != nil {
return nil, err
}
return listerat{file}, nil
}
// implements RealpathFileLister interface
func (fs *root) Realpath(p string) string {
if fs.startDirectory == "" || fs.startDirectory == "/" {
return cleanPath(p)
}
return cleanPathWithBase(fs.startDirectory, p)
}
// In memory file-system-y thing that the Hanlders live on
type root struct {
rootFile *memFile
mockErr error
startDirectory string
mu sync.Mutex
files map[string]*memFile
}
// Set a mocked error that the next handler call will return.
// Set to nil to reset for no error.
func (fs *root) returnErr(err error) {
fs.mockErr = err
}
func (fs *root) lfetch(path string) (*memFile, error) {
if path == "/" {
return fs.rootFile, nil
}
file, ok := fs.files[path]
if file == nil {
if ok {
delete(fs.files, path)
}
return nil, os.ErrNotExist
}
return file, nil
}
// canonName returns the “canonical” name of a file, that is:
// if the directory of the pathname is a symlink, it follows that symlink to the valid directory name.
// this is relatively easy, since `dir.name` will be the only valid canonical path for a directory.
func (fs *root) canonName(pathname string) (string, error) {
dirname, filename := path.Dir(pathname), path.Base(pathname)
dir, err := fs.fetch(dirname)
if err != nil {
return "", err
}
if !dir.IsDir() {
return "", syscall.ENOTDIR
}
return path.Join(dir.name, filename), nil
}
func (fs *root) exists(path string) bool {
path, err := fs.canonName(path)
if err != nil {
return false
}
_, err = fs.lfetch(path)
return err != os.ErrNotExist
}
func (fs *root) fetch(path string) (*memFile, error) {
file, err := fs.lfetch(path)
if err != nil {
return nil, err
}
var count int
for file.symlink != "" {
if count++; count > maxSymlinkFollows {
return nil, errTooManySymlinks
}
file, err = fs.lfetch(file.symlink)
if err != nil {
return nil, err
}
}
return file, nil
}
// Implements os.FileInfo, io.ReaderAt and io.WriterAt interfaces.
// These are the 3 interfaces necessary for the Handlers.
// Implements the optional interface TransferError.
type memFile struct {
name string
modtime time.Time
symlink string
isdir bool
mu sync.RWMutex
content []byte
err error
}
// These are helper functions, they must be called while holding the memFile.mu mutex
func (f *memFile) size() int64 { return int64(len(f.content)) }
func (f *memFile) grow(n int64) { f.content = append(f.content, make([]byte, n)...) }
// Have memFile fulfill os.FileInfo interface
func (f *memFile) Name() string { return path.Base(f.name) }
func (f *memFile) Size() int64 {
f.mu.Lock()
defer f.mu.Unlock()
return f.size()
}
func (f *memFile) Mode() os.FileMode {
if f.isdir {
return os.FileMode(0755) | os.ModeDir
}
if f.symlink != "" {
return os.FileMode(0777) | os.ModeSymlink
}
return os.FileMode(0644)
}
func (f *memFile) ModTime() time.Time { return f.modtime }
func (f *memFile) IsDir() bool { return f.isdir }
func (f *memFile) Sys() interface{} {
return fakeFileInfoSys()
}
func (f *memFile) ReadAt(b []byte, off int64) (int, error) {
f.mu.Lock()
defer f.mu.Unlock()
if f.err != nil {
return 0, f.err
}
if off < 0 {
return 0, errors.New("memFile.ReadAt: negative offset")
}
if off >= f.size() {
return 0, io.EOF
}
n := copy(b, f.content[off:])
if n < len(b) {
return n, io.EOF
}
return n, nil
}
func (f *memFile) WriteAt(b []byte, off int64) (int, error) {
// fmt.Println(string(p), off)
// mimic write delays, should be optional
time.Sleep(time.Microsecond * time.Duration(len(b)))
f.mu.Lock()
defer f.mu.Unlock()
if f.err != nil {
return 0, f.err
}
grow := int64(len(b)) + off - f.size()
if grow > 0 {
f.grow(grow)
}
return copy(f.content[off:], b), nil
}
func (f *memFile) Truncate(size int64) error {
f.mu.Lock()
defer f.mu.Unlock()
if f.err != nil {
return f.err
}
grow := size - f.size()
if grow <= 0 {
f.content = f.content[:size]
} else {
f.grow(grow)
}
return nil
}
func (f *memFile) TransferError(err error) {
f.mu.Lock()
defer f.mu.Unlock()
f.err = err
}

121
vendor/github.com/pkg/sftp/request-interfaces.go generated vendored Normal file
View file

@ -0,0 +1,121 @@
package sftp
import (
"io"
"os"
)
// WriterAtReaderAt defines the interface to return when a file is to
// be opened for reading and writing
type WriterAtReaderAt interface {
io.WriterAt
io.ReaderAt
}
// Interfaces are differentiated based on required returned values.
// All input arguments are to be pulled from Request (the only arg).
// The Handler interfaces all take the Request object as its only argument.
// All the data you should need to handle the call are in the Request object.
// The request.Method attribute is initially the most important one as it
// determines which Handler gets called.
// FileReader should return an io.ReaderAt for the filepath
// Note in cases of an error, the error text will be sent to the client.
// Called for Methods: Get
type FileReader interface {
Fileread(*Request) (io.ReaderAt, error)
}
// FileWriter should return an io.WriterAt for the filepath.
//
// The request server code will call Close() on the returned io.WriterAt
// ojbect if an io.Closer type assertion succeeds.
// Note in cases of an error, the error text will be sent to the client.
// Note when receiving an Append flag it is important to not open files using
// O_APPEND if you plan to use WriteAt, as they conflict.
// Called for Methods: Put, Open
type FileWriter interface {
Filewrite(*Request) (io.WriterAt, error)
}
// OpenFileWriter is a FileWriter that implements the generic OpenFile method.
// You need to implement this optional interface if you want to be able
// to read and write from/to the same handle.
// Called for Methods: Open
type OpenFileWriter interface {
FileWriter
OpenFile(*Request) (WriterAtReaderAt, error)
}
// FileCmder should return an error
// Note in cases of an error, the error text will be sent to the client.
// Called for Methods: Setstat, Rename, Rmdir, Mkdir, Link, Symlink, Remove
type FileCmder interface {
Filecmd(*Request) error
}
// PosixRenameFileCmder is a FileCmder that implements the PosixRename method.
// If this interface is implemented PosixRename requests will call it
// otherwise they will be handled in the same way as Rename
type PosixRenameFileCmder interface {
FileCmder
PosixRename(*Request) error
}
// StatVFSFileCmder is a FileCmder that implements the StatVFS method.
// You need to implement this interface if you want to handle statvfs requests.
// Please also be sure that the statvfs@openssh.com extension is enabled
type StatVFSFileCmder interface {
FileCmder
StatVFS(*Request) (*StatVFS, error)
}
// FileLister should return an object that fulfils the ListerAt interface
// Note in cases of an error, the error text will be sent to the client.
// Called for Methods: List, Stat, Readlink
type FileLister interface {
Filelist(*Request) (ListerAt, error)
}
// LstatFileLister is a FileLister that implements the Lstat method.
// If this interface is implemented Lstat requests will call it
// otherwise they will be handled in the same way as Stat
type LstatFileLister interface {
FileLister
Lstat(*Request) (ListerAt, error)
}
// RealPathFileLister is a FileLister that implements the Realpath method.
// We use "/" as start directory for relative paths, implementing this
// interface you can customize the start directory.
// You have to return an absolute POSIX path.
type RealPathFileLister interface {
FileLister
RealPath(string) string
}
// NameLookupFileLister is a FileLister that implmeents the LookupUsername and LookupGroupName methods.
// If this interface is implemented, then longname ls formatting will use these to convert usernames and groupnames.
type NameLookupFileLister interface {
FileLister
LookupUserName(string) string
LookupGroupName(string) string
}
// ListerAt does for file lists what io.ReaderAt does for files.
// ListAt should return the number of entries copied and an io.EOF
// error if at end of list. This is testable by comparing how many you
// copied to how many could be copied (eg. n < len(ls) below).
// The copy() builtin is best for the copying.
// Note in cases of an error, the error text will be sent to the client.
type ListerAt interface {
ListAt([]os.FileInfo, int64) (int, error)
}
// TransferError is an optional interface that readerAt and writerAt
// can implement to be notified about the error causing Serve() to exit
// with the request still open
type TransferError interface {
TransferError(err error)
}

34
vendor/github.com/pkg/sftp/request-plan9.go generated vendored Normal file
View file

@ -0,0 +1,34 @@
// +build plan9
package sftp
import (
"path"
"path/filepath"
"syscall"
)
func fakeFileInfoSys() interface{} {
return &syscall.Dir{}
}
func testOsSys(sys interface{}) error {
return nil
}
func toLocalPath(p string) string {
lp := filepath.FromSlash(p)
if path.IsAbs(p) {
tmp := lp[1:]
if filepath.IsAbs(tmp) {
// If the FromSlash without any starting slashes is absolute,
// then we have a filepath encoded with a prefix '/'.
// e.g. "/#s/boot" to "#s/boot"
return tmp
}
}
return lp
}

53
vendor/github.com/pkg/sftp/request-readme.md generated vendored Normal file
View file

@ -0,0 +1,53 @@
# Request Based SFTP API
The request based API allows for custom backends in a way similar to the http
package. In order to create a backend you need to implement 4 handler
interfaces; one for reading, one for writing, one for misc commands and one for
listing files. Each has 1 required method and in each case those methods take
the Request as the only parameter and they each return something different.
These 4 interfaces are enough to handle all the SFTP traffic in a simplified
manner.
The Request structure has 5 public fields which you will deal with.
- Method (string) - string name of incoming call
- Filepath (string) - POSIX path of file to act on
- Flags (uint32) - 32bit bitmask value of file open/create flags
- Attrs ([]byte) - byte string of file attribute data
- Target (string) - target path for renames and sym-links
Below are the methods and a brief description of what they need to do.
### Fileread(*Request) (io.Reader, error)
Handler for "Get" method and returns an io.Reader for the file which the server
then sends to the client.
### Filewrite(*Request) (io.Writer, error)
Handler for "Put" method and returns an io.Writer for the file which the server
then writes the uploaded file to. The file opening "pflags" are currently
preserved in the Request.Flags field as a 32bit bitmask value. See the [SFTP
spec](https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-6.3) for
details.
### Filecmd(*Request) error
Handles "SetStat", "Rename", "Rmdir", "Mkdir" and "Symlink" methods. Makes the
appropriate changes and returns nil for success or an filesystem like error
(eg. os.ErrNotExist). The attributes are currently propagated in their raw form
([]byte) and will need to be unmarshalled to be useful. See the respond method
on sshFxpSetstatPacket for example of you might want to do this.
### Fileinfo(*Request) ([]os.FileInfo, error)
Handles "List", "Stat", "Readlink" methods. Gathers/creates FileInfo structs
with the data on the files and returns in a list (list of 1 for Stat and
Readlink).
## TODO
- Add support for API users to see trace/debugging info of what is going on
inside SFTP server.
- Unmarshal the file attributes into a structure on the Request object.

304
vendor/github.com/pkg/sftp/request-server.go generated vendored Normal file
View file

@ -0,0 +1,304 @@
package sftp
import (
"context"
"errors"
"io"
"path"
"path/filepath"
"strconv"
"sync"
)
var maxTxPacket uint32 = 1 << 15
// Handlers contains the 4 SFTP server request handlers.
type Handlers struct {
FileGet FileReader
FilePut FileWriter
FileCmd FileCmder
FileList FileLister
}
// RequestServer abstracts the sftp protocol with an http request-like protocol
type RequestServer struct {
Handlers Handlers
*serverConn
pktMgr *packetManager
mu sync.RWMutex
handleCount int
openRequests map[string]*Request
}
// A RequestServerOption is a function which applies configuration to a RequestServer.
type RequestServerOption func(*RequestServer)
// WithRSAllocator enable the allocator.
// After processing a packet we keep in memory the allocated slices
// and we reuse them for new packets.
// The allocator is experimental
func WithRSAllocator() RequestServerOption {
return func(rs *RequestServer) {
alloc := newAllocator()
rs.pktMgr.alloc = alloc
rs.conn.alloc = alloc
}
}
// NewRequestServer creates/allocates/returns new RequestServer.
// Normally there will be one server per user-session.
func NewRequestServer(rwc io.ReadWriteCloser, h Handlers, options ...RequestServerOption) *RequestServer {
svrConn := &serverConn{
conn: conn{
Reader: rwc,
WriteCloser: rwc,
},
}
rs := &RequestServer{
Handlers: h,
serverConn: svrConn,
pktMgr: newPktMgr(svrConn),
openRequests: make(map[string]*Request),
}
for _, o := range options {
o(rs)
}
return rs
}
// New Open packet/Request
func (rs *RequestServer) nextRequest(r *Request) string {
rs.mu.Lock()
defer rs.mu.Unlock()
rs.handleCount++
r.handle = strconv.Itoa(rs.handleCount)
rs.openRequests[r.handle] = r
return r.handle
}
// Returns Request from openRequests, bool is false if it is missing.
//
// The Requests in openRequests work essentially as open file descriptors that
// you can do different things with. What you are doing with it are denoted by
// the first packet of that type (read/write/etc).
func (rs *RequestServer) getRequest(handle string) (*Request, bool) {
rs.mu.RLock()
defer rs.mu.RUnlock()
r, ok := rs.openRequests[handle]
return r, ok
}
// Close the Request and clear from openRequests map
func (rs *RequestServer) closeRequest(handle string) error {
rs.mu.Lock()
defer rs.mu.Unlock()
if r, ok := rs.openRequests[handle]; ok {
delete(rs.openRequests, handle)
return r.close()
}
return EBADF
}
// Close the read/write/closer to trigger exiting the main server loop
func (rs *RequestServer) Close() error { return rs.conn.Close() }
func (rs *RequestServer) serveLoop(pktChan chan<- orderedRequest) error {
defer close(pktChan) // shuts down sftpServerWorkers
var err error
var pkt requestPacket
var pktType uint8
var pktBytes []byte
for {
pktType, pktBytes, err = rs.serverConn.recvPacket(rs.pktMgr.getNextOrderID())
if err != nil {
// we don't care about releasing allocated pages here, the server will quit and the allocator freed
return err
}
pkt, err = makePacket(rxPacket{fxp(pktType), pktBytes})
if err != nil {
switch {
case errors.Is(err, errUnknownExtendedPacket):
// do nothing
default:
debug("makePacket err: %v", err)
rs.conn.Close() // shuts down recvPacket
return err
}
}
pktChan <- rs.pktMgr.newOrderedRequest(pkt)
}
}
// Serve requests for user session
func (rs *RequestServer) Serve() error {
defer func() {
if rs.pktMgr.alloc != nil {
rs.pktMgr.alloc.Free()
}
}()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
var wg sync.WaitGroup
runWorker := func(ch chan orderedRequest) {
wg.Add(1)
go func() {
defer wg.Done()
if err := rs.packetWorker(ctx, ch); err != nil {
rs.conn.Close() // shuts down recvPacket
}
}()
}
pktChan := rs.pktMgr.workerChan(runWorker)
err := rs.serveLoop(pktChan)
wg.Wait() // wait for all workers to exit
rs.mu.Lock()
defer rs.mu.Unlock()
// make sure all open requests are properly closed
// (eg. possible on dropped connections, client crashes, etc.)
for handle, req := range rs.openRequests {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
req.transferError(err)
delete(rs.openRequests, handle)
req.close()
}
return err
}
func (rs *RequestServer) packetWorker(ctx context.Context, pktChan chan orderedRequest) error {
for pkt := range pktChan {
orderID := pkt.orderID()
if epkt, ok := pkt.requestPacket.(*sshFxpExtendedPacket); ok {
if epkt.SpecificPacket != nil {
pkt.requestPacket = epkt.SpecificPacket
}
}
var rpkt responsePacket
switch pkt := pkt.requestPacket.(type) {
case *sshFxInitPacket:
rpkt = &sshFxVersionPacket{Version: sftpProtocolVersion, Extensions: sftpExtensions}
case *sshFxpClosePacket:
handle := pkt.getHandle()
rpkt = statusFromError(pkt.ID, rs.closeRequest(handle))
case *sshFxpRealpathPacket:
var realPath string
if realPather, ok := rs.Handlers.FileList.(RealPathFileLister); ok {
realPath = realPather.RealPath(pkt.getPath())
} else {
realPath = cleanPath(pkt.getPath())
}
rpkt = cleanPacketPath(pkt, realPath)
case *sshFxpOpendirPacket:
request := requestFromPacket(ctx, pkt)
handle := rs.nextRequest(request)
rpkt = request.opendir(rs.Handlers, pkt)
if _, ok := rpkt.(*sshFxpHandlePacket); !ok {
// if we return an error we have to remove the handle from the active ones
rs.closeRequest(handle)
}
case *sshFxpOpenPacket:
request := requestFromPacket(ctx, pkt)
handle := rs.nextRequest(request)
rpkt = request.open(rs.Handlers, pkt)
if _, ok := rpkt.(*sshFxpHandlePacket); !ok {
// if we return an error we have to remove the handle from the active ones
rs.closeRequest(handle)
}
case *sshFxpFstatPacket:
handle := pkt.getHandle()
request, ok := rs.getRequest(handle)
if !ok {
rpkt = statusFromError(pkt.ID, EBADF)
} else {
request = NewRequest("Stat", request.Filepath)
rpkt = request.call(rs.Handlers, pkt, rs.pktMgr.alloc, orderID)
}
case *sshFxpFsetstatPacket:
handle := pkt.getHandle()
request, ok := rs.getRequest(handle)
if !ok {
rpkt = statusFromError(pkt.ID, EBADF)
} else {
request = NewRequest("Setstat", request.Filepath)
rpkt = request.call(rs.Handlers, pkt, rs.pktMgr.alloc, orderID)
}
case *sshFxpExtendedPacketPosixRename:
request := NewRequest("PosixRename", pkt.Oldpath)
request.Target = pkt.Newpath
rpkt = request.call(rs.Handlers, pkt, rs.pktMgr.alloc, orderID)
case *sshFxpExtendedPacketStatVFS:
request := NewRequest("StatVFS", pkt.Path)
rpkt = request.call(rs.Handlers, pkt, rs.pktMgr.alloc, orderID)
case hasHandle:
handle := pkt.getHandle()
request, ok := rs.getRequest(handle)
if !ok {
rpkt = statusFromError(pkt.id(), EBADF)
} else {
rpkt = request.call(rs.Handlers, pkt, rs.pktMgr.alloc, orderID)
}
case hasPath:
request := requestFromPacket(ctx, pkt)
rpkt = request.call(rs.Handlers, pkt, rs.pktMgr.alloc, orderID)
request.close()
default:
rpkt = statusFromError(pkt.id(), ErrSSHFxOpUnsupported)
}
rs.pktMgr.readyPacket(
rs.pktMgr.newOrderedResponse(rpkt, orderID))
}
return nil
}
// clean and return name packet for file
func cleanPacketPath(pkt *sshFxpRealpathPacket, realPath string) responsePacket {
return &sshFxpNamePacket{
ID: pkt.id(),
NameAttrs: []*sshFxpNameAttr{
{
Name: realPath,
LongName: realPath,
Attrs: emptyFileStat,
},
},
}
}
// Makes sure we have a clean POSIX (/) absolute path to work with
func cleanPath(p string) string {
return cleanPathWithBase("/", p)
}
func cleanPathWithBase(base, p string) string {
p = filepath.ToSlash(filepath.Clean(p))
if !path.IsAbs(p) {
return path.Join(base, p)
}
return p
}

27
vendor/github.com/pkg/sftp/request-unix.go generated vendored Normal file
View file

@ -0,0 +1,27 @@
// +build !windows,!plan9
package sftp
import (
"errors"
"syscall"
)
func fakeFileInfoSys() interface{} {
return &syscall.Stat_t{Uid: 65534, Gid: 65534}
}
func testOsSys(sys interface{}) error {
fstat := sys.(*FileStat)
if fstat.UID != uint32(65534) {
return errors.New("Uid failed to match")
}
if fstat.GID != uint32(65534) {
return errors.New("Gid failed to match")
}
return nil
}
func toLocalPath(p string) string {
return p
}

628
vendor/github.com/pkg/sftp/request.go generated vendored Normal file
View file

@ -0,0 +1,628 @@
package sftp
import (
"context"
"errors"
"fmt"
"io"
"os"
"strings"
"sync"
"syscall"
)
// MaxFilelist is the max number of files to return in a readdir batch.
var MaxFilelist int64 = 100
// state encapsulates the reader/writer/readdir from handlers.
type state struct {
mu sync.RWMutex
writerAt io.WriterAt
readerAt io.ReaderAt
writerAtReaderAt WriterAtReaderAt
listerAt ListerAt
lsoffset int64
}
// copy returns a shallow copy the state.
// This is broken out to specific fields,
// because we have to copy around the mutex in state.
func (s *state) copy() state {
s.mu.RLock()
defer s.mu.RUnlock()
return state{
writerAt: s.writerAt,
readerAt: s.readerAt,
writerAtReaderAt: s.writerAtReaderAt,
listerAt: s.listerAt,
lsoffset: s.lsoffset,
}
}
func (s *state) setReaderAt(rd io.ReaderAt) {
s.mu.Lock()
defer s.mu.Unlock()
s.readerAt = rd
}
func (s *state) getReaderAt() io.ReaderAt {
s.mu.RLock()
defer s.mu.RUnlock()
return s.readerAt
}
func (s *state) setWriterAt(rd io.WriterAt) {
s.mu.Lock()
defer s.mu.Unlock()
s.writerAt = rd
}
func (s *state) getWriterAt() io.WriterAt {
s.mu.RLock()
defer s.mu.RUnlock()
return s.writerAt
}
func (s *state) setWriterAtReaderAt(rw WriterAtReaderAt) {
s.mu.Lock()
defer s.mu.Unlock()
s.writerAtReaderAt = rw
}
func (s *state) getWriterAtReaderAt() WriterAtReaderAt {
s.mu.RLock()
defer s.mu.RUnlock()
return s.writerAtReaderAt
}
func (s *state) getAllReaderWriters() (io.ReaderAt, io.WriterAt, WriterAtReaderAt) {
s.mu.RLock()
defer s.mu.RUnlock()
return s.readerAt, s.writerAt, s.writerAtReaderAt
}
// Returns current offset for file list
func (s *state) lsNext() int64 {
s.mu.RLock()
defer s.mu.RUnlock()
return s.lsoffset
}
// Increases next offset
func (s *state) lsInc(offset int64) {
s.mu.Lock()
defer s.mu.Unlock()
s.lsoffset += offset
}
// manage file read/write state
func (s *state) setListerAt(la ListerAt) {
s.mu.Lock()
defer s.mu.Unlock()
s.listerAt = la
}
func (s *state) getListerAt() ListerAt {
s.mu.RLock()
defer s.mu.RUnlock()
return s.listerAt
}
// Request contains the data and state for the incoming service request.
type Request struct {
// Get, Put, Setstat, Stat, Rename, Remove
// Rmdir, Mkdir, List, Readlink, Link, Symlink
Method string
Filepath string
Flags uint32
Attrs []byte // convert to sub-struct
Target string // for renames and sym-links
handle string
// reader/writer/readdir from handlers
state
// context lasts duration of request
ctx context.Context
cancelCtx context.CancelFunc
}
// NewRequest creates a new Request object.
func NewRequest(method, path string) *Request {
return &Request{
Method: method,
Filepath: cleanPath(path),
}
}
// copy returns a shallow copy of existing request.
// This is broken out to specific fields,
// because we have to copy around the mutex in state.
func (r *Request) copy() *Request {
return &Request{
Method: r.Method,
Filepath: r.Filepath,
Flags: r.Flags,
Attrs: r.Attrs,
Target: r.Target,
handle: r.handle,
state: r.state.copy(),
ctx: r.ctx,
cancelCtx: r.cancelCtx,
}
}
// New Request initialized based on packet data
func requestFromPacket(ctx context.Context, pkt hasPath) *Request {
method := requestMethod(pkt)
request := NewRequest(method, pkt.getPath())
request.ctx, request.cancelCtx = context.WithCancel(ctx)
switch p := pkt.(type) {
case *sshFxpOpenPacket:
request.Flags = p.Pflags
case *sshFxpSetstatPacket:
request.Flags = p.Flags
request.Attrs = p.Attrs.([]byte)
case *sshFxpRenamePacket:
request.Target = cleanPath(p.Newpath)
case *sshFxpSymlinkPacket:
// NOTE: given a POSIX compliant signature: symlink(target, linkpath string)
// this makes Request.Target the linkpath, and Request.Filepath the target.
request.Target = cleanPath(p.Linkpath)
case *sshFxpExtendedPacketHardlink:
request.Target = cleanPath(p.Newpath)
}
return request
}
// Context returns the request's context. To change the context,
// use WithContext.
//
// The returned context is always non-nil; it defaults to the
// background context.
//
// For incoming server requests, the context is canceled when the
// request is complete or the client's connection closes.
func (r *Request) Context() context.Context {
if r.ctx != nil {
return r.ctx
}
return context.Background()
}
// WithContext returns a copy of r with its context changed to ctx.
// The provided ctx must be non-nil.
func (r *Request) WithContext(ctx context.Context) *Request {
if ctx == nil {
panic("nil context")
}
r2 := r.copy()
r2.ctx = ctx
r2.cancelCtx = nil
return r2
}
// Close reader/writer if possible
func (r *Request) close() error {
defer func() {
if r.cancelCtx != nil {
r.cancelCtx()
}
}()
rd, wr, rw := r.getAllReaderWriters()
var err error
// Close errors on a Writer are far more likely to be the important one.
// As they can be information that there was a loss of data.
if c, ok := wr.(io.Closer); ok {
if err2 := c.Close(); err == nil {
// update error if it is still nil
err = err2
}
}
if c, ok := rw.(io.Closer); ok {
if err2 := c.Close(); err == nil {
// update error if it is still nil
err = err2
r.setWriterAtReaderAt(nil)
}
}
if c, ok := rd.(io.Closer); ok {
if err2 := c.Close(); err == nil {
// update error if it is still nil
err = err2
}
}
return err
}
// Notify transfer error if any
func (r *Request) transferError(err error) {
if err == nil {
return
}
rd, wr, rw := r.getAllReaderWriters()
if t, ok := wr.(TransferError); ok {
t.TransferError(err)
}
if t, ok := rw.(TransferError); ok {
t.TransferError(err)
}
if t, ok := rd.(TransferError); ok {
t.TransferError(err)
}
}
// called from worker to handle packet/request
func (r *Request) call(handlers Handlers, pkt requestPacket, alloc *allocator, orderID uint32) responsePacket {
switch r.Method {
case "Get":
return fileget(handlers.FileGet, r, pkt, alloc, orderID)
case "Put":
return fileput(handlers.FilePut, r, pkt, alloc, orderID)
case "Open":
return fileputget(handlers.FilePut, r, pkt, alloc, orderID)
case "Setstat", "Rename", "Rmdir", "Mkdir", "Link", "Symlink", "Remove", "PosixRename", "StatVFS":
return filecmd(handlers.FileCmd, r, pkt)
case "List":
return filelist(handlers.FileList, r, pkt)
case "Stat", "Lstat", "Readlink":
return filestat(handlers.FileList, r, pkt)
default:
return statusFromError(pkt.id(), fmt.Errorf("unexpected method: %s", r.Method))
}
}
// Additional initialization for Open packets
func (r *Request) open(h Handlers, pkt requestPacket) responsePacket {
flags := r.Pflags()
id := pkt.id()
switch {
case flags.Write, flags.Append, flags.Creat, flags.Trunc:
if flags.Read {
if openFileWriter, ok := h.FilePut.(OpenFileWriter); ok {
r.Method = "Open"
rw, err := openFileWriter.OpenFile(r)
if err != nil {
return statusFromError(id, err)
}
r.setWriterAtReaderAt(rw)
return &sshFxpHandlePacket{
ID: id,
Handle: r.handle,
}
}
}
r.Method = "Put"
wr, err := h.FilePut.Filewrite(r)
if err != nil {
return statusFromError(id, err)
}
r.setWriterAt(wr)
case flags.Read:
r.Method = "Get"
rd, err := h.FileGet.Fileread(r)
if err != nil {
return statusFromError(id, err)
}
r.setReaderAt(rd)
default:
return statusFromError(id, errors.New("bad file flags"))
}
return &sshFxpHandlePacket{
ID: id,
Handle: r.handle,
}
}
func (r *Request) opendir(h Handlers, pkt requestPacket) responsePacket {
r.Method = "List"
la, err := h.FileList.Filelist(r)
if err != nil {
return statusFromError(pkt.id(), wrapPathError(r.Filepath, err))
}
r.setListerAt(la)
return &sshFxpHandlePacket{
ID: pkt.id(),
Handle: r.handle,
}
}
// wrap FileReader handler
func fileget(h FileReader, r *Request, pkt requestPacket, alloc *allocator, orderID uint32) responsePacket {
rd := r.getReaderAt()
if rd == nil {
return statusFromError(pkt.id(), errors.New("unexpected read packet"))
}
data, offset, _ := packetData(pkt, alloc, orderID)
n, err := rd.ReadAt(data, offset)
// only return EOF error if no data left to read
if err != nil && (err != io.EOF || n == 0) {
return statusFromError(pkt.id(), err)
}
return &sshFxpDataPacket{
ID: pkt.id(),
Length: uint32(n),
Data: data[:n],
}
}
// wrap FileWriter handler
func fileput(h FileWriter, r *Request, pkt requestPacket, alloc *allocator, orderID uint32) responsePacket {
wr := r.getWriterAt()
if wr == nil {
return statusFromError(pkt.id(), errors.New("unexpected write packet"))
}
data, offset, _ := packetData(pkt, alloc, orderID)
_, err := wr.WriteAt(data, offset)
return statusFromError(pkt.id(), err)
}
// wrap OpenFileWriter handler
func fileputget(h FileWriter, r *Request, pkt requestPacket, alloc *allocator, orderID uint32) responsePacket {
rw := r.getWriterAtReaderAt()
if rw == nil {
return statusFromError(pkt.id(), errors.New("unexpected write and read packet"))
}
switch p := pkt.(type) {
case *sshFxpReadPacket:
data, offset := p.getDataSlice(alloc, orderID), int64(p.Offset)
n, err := rw.ReadAt(data, offset)
// only return EOF error if no data left to read
if err != nil && (err != io.EOF || n == 0) {
return statusFromError(pkt.id(), err)
}
return &sshFxpDataPacket{
ID: pkt.id(),
Length: uint32(n),
Data: data[:n],
}
case *sshFxpWritePacket:
data, offset := p.Data, int64(p.Offset)
_, err := rw.WriteAt(data, offset)
return statusFromError(pkt.id(), err)
default:
return statusFromError(pkt.id(), errors.New("unexpected packet type for read or write"))
}
}
// file data for additional read/write packets
func packetData(p requestPacket, alloc *allocator, orderID uint32) (data []byte, offset int64, length uint32) {
switch p := p.(type) {
case *sshFxpReadPacket:
return p.getDataSlice(alloc, orderID), int64(p.Offset), p.Len
case *sshFxpWritePacket:
return p.Data, int64(p.Offset), p.Length
}
return
}
// wrap FileCmder handler
func filecmd(h FileCmder, r *Request, pkt requestPacket) responsePacket {
switch p := pkt.(type) {
case *sshFxpFsetstatPacket:
r.Flags = p.Flags
r.Attrs = p.Attrs.([]byte)
}
switch r.Method {
case "PosixRename":
if posixRenamer, ok := h.(PosixRenameFileCmder); ok {
err := posixRenamer.PosixRename(r)
return statusFromError(pkt.id(), err)
}
// PosixRenameFileCmder not implemented handle this request as a Rename
r.Method = "Rename"
err := h.Filecmd(r)
return statusFromError(pkt.id(), err)
case "StatVFS":
if statVFSCmdr, ok := h.(StatVFSFileCmder); ok {
stat, err := statVFSCmdr.StatVFS(r)
if err != nil {
return statusFromError(pkt.id(), err)
}
stat.ID = pkt.id()
return stat
}
return statusFromError(pkt.id(), ErrSSHFxOpUnsupported)
}
err := h.Filecmd(r)
return statusFromError(pkt.id(), err)
}
// wrap FileLister handler
func filelist(h FileLister, r *Request, pkt requestPacket) responsePacket {
lister := r.getListerAt()
if lister == nil {
return statusFromError(pkt.id(), errors.New("unexpected dir packet"))
}
offset := r.lsNext()
finfo := make([]os.FileInfo, MaxFilelist)
n, err := lister.ListAt(finfo, offset)
r.lsInc(int64(n))
// ignore EOF as we only return it when there are no results
finfo = finfo[:n] // avoid need for nil tests below
switch r.Method {
case "List":
if err != nil && (err != io.EOF || n == 0) {
return statusFromError(pkt.id(), err)
}
nameAttrs := make([]*sshFxpNameAttr, 0, len(finfo))
// If the type conversion fails, we get untyped `nil`,
// which is handled by not looking up any names.
idLookup, _ := h.(NameLookupFileLister)
for _, fi := range finfo {
nameAttrs = append(nameAttrs, &sshFxpNameAttr{
Name: fi.Name(),
LongName: runLs(idLookup, fi),
Attrs: []interface{}{fi},
})
}
return &sshFxpNamePacket{
ID: pkt.id(),
NameAttrs: nameAttrs,
}
default:
err = fmt.Errorf("unexpected method: %s", r.Method)
return statusFromError(pkt.id(), err)
}
}
func filestat(h FileLister, r *Request, pkt requestPacket) responsePacket {
var lister ListerAt
var err error
if r.Method == "Lstat" {
if lstatFileLister, ok := h.(LstatFileLister); ok {
lister, err = lstatFileLister.Lstat(r)
} else {
// LstatFileLister not implemented handle this request as a Stat
r.Method = "Stat"
lister, err = h.Filelist(r)
}
} else {
lister, err = h.Filelist(r)
}
if err != nil {
return statusFromError(pkt.id(), err)
}
finfo := make([]os.FileInfo, 1)
n, err := lister.ListAt(finfo, 0)
finfo = finfo[:n] // avoid need for nil tests below
switch r.Method {
case "Stat", "Lstat":
if err != nil && err != io.EOF {
return statusFromError(pkt.id(), err)
}
if n == 0 {
err = &os.PathError{
Op: strings.ToLower(r.Method),
Path: r.Filepath,
Err: syscall.ENOENT,
}
return statusFromError(pkt.id(), err)
}
return &sshFxpStatResponse{
ID: pkt.id(),
info: finfo[0],
}
case "Readlink":
if err != nil && err != io.EOF {
return statusFromError(pkt.id(), err)
}
if n == 0 {
err = &os.PathError{
Op: "readlink",
Path: r.Filepath,
Err: syscall.ENOENT,
}
return statusFromError(pkt.id(), err)
}
filename := finfo[0].Name()
return &sshFxpNamePacket{
ID: pkt.id(),
NameAttrs: []*sshFxpNameAttr{
{
Name: filename,
LongName: filename,
Attrs: emptyFileStat,
},
},
}
default:
err = fmt.Errorf("unexpected method: %s", r.Method)
return statusFromError(pkt.id(), err)
}
}
// init attributes of request object from packet data
func requestMethod(p requestPacket) (method string) {
switch p.(type) {
case *sshFxpReadPacket, *sshFxpWritePacket, *sshFxpOpenPacket:
// set in open() above
case *sshFxpOpendirPacket, *sshFxpReaddirPacket:
// set in opendir() above
case *sshFxpSetstatPacket, *sshFxpFsetstatPacket:
method = "Setstat"
case *sshFxpRenamePacket:
method = "Rename"
case *sshFxpSymlinkPacket:
method = "Symlink"
case *sshFxpRemovePacket:
method = "Remove"
case *sshFxpStatPacket, *sshFxpFstatPacket:
method = "Stat"
case *sshFxpLstatPacket:
method = "Lstat"
case *sshFxpRmdirPacket:
method = "Rmdir"
case *sshFxpReadlinkPacket:
method = "Readlink"
case *sshFxpMkdirPacket:
method = "Mkdir"
case *sshFxpExtendedPacketHardlink:
method = "Link"
}
return method
}

44
vendor/github.com/pkg/sftp/request_windows.go generated vendored Normal file
View file

@ -0,0 +1,44 @@
package sftp
import (
"path"
"path/filepath"
"syscall"
)
func fakeFileInfoSys() interface{} {
return syscall.Win32FileAttributeData{}
}
func testOsSys(sys interface{}) error {
return nil
}
func toLocalPath(p string) string {
lp := filepath.FromSlash(p)
if path.IsAbs(p) {
tmp := lp
for len(tmp) > 0 && tmp[0] == '\\' {
tmp = tmp[1:]
}
if filepath.IsAbs(tmp) {
// If the FromSlash without any starting slashes is absolute,
// then we have a filepath encoded with a prefix '/'.
// e.g. "/C:/Windows" to "C:\\Windows"
return tmp
}
tmp += "\\"
if filepath.IsAbs(tmp) {
// If the FromSlash without any starting slashes but with extra end slash is absolute,
// then we have a filepath encoded with a prefix '/' and a dropped '/' at the end.
// e.g. "/C:" to "C:\\"
return tmp
}
}
return lp
}

616
vendor/github.com/pkg/sftp/server.go generated vendored Normal file
View file

@ -0,0 +1,616 @@
package sftp
// sftp server counterpart
import (
"encoding"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"sync"
"syscall"
"time"
)
const (
// SftpServerWorkerCount defines the number of workers for the SFTP server
SftpServerWorkerCount = 8
)
// Server is an SSH File Transfer Protocol (sftp) server.
// This is intended to provide the sftp subsystem to an ssh server daemon.
// This implementation currently supports most of sftp server protocol version 3,
// as specified at http://tools.ietf.org/html/draft-ietf-secsh-filexfer-02
type Server struct {
*serverConn
debugStream io.Writer
readOnly bool
pktMgr *packetManager
openFiles map[string]*os.File
openFilesLock sync.RWMutex
handleCount int
}
func (svr *Server) nextHandle(f *os.File) string {
svr.openFilesLock.Lock()
defer svr.openFilesLock.Unlock()
svr.handleCount++
handle := strconv.Itoa(svr.handleCount)
svr.openFiles[handle] = f
return handle
}
func (svr *Server) closeHandle(handle string) error {
svr.openFilesLock.Lock()
defer svr.openFilesLock.Unlock()
if f, ok := svr.openFiles[handle]; ok {
delete(svr.openFiles, handle)
return f.Close()
}
return EBADF
}
func (svr *Server) getHandle(handle string) (*os.File, bool) {
svr.openFilesLock.RLock()
defer svr.openFilesLock.RUnlock()
f, ok := svr.openFiles[handle]
return f, ok
}
type serverRespondablePacket interface {
encoding.BinaryUnmarshaler
id() uint32
respond(svr *Server) responsePacket
}
// NewServer creates a new Server instance around the provided streams, serving
// content from the root of the filesystem. Optionally, ServerOption
// functions may be specified to further configure the Server.
//
// A subsequent call to Serve() is required to begin serving files over SFTP.
func NewServer(rwc io.ReadWriteCloser, options ...ServerOption) (*Server, error) {
svrConn := &serverConn{
conn: conn{
Reader: rwc,
WriteCloser: rwc,
},
}
s := &Server{
serverConn: svrConn,
debugStream: ioutil.Discard,
pktMgr: newPktMgr(svrConn),
openFiles: make(map[string]*os.File),
}
for _, o := range options {
if err := o(s); err != nil {
return nil, err
}
}
return s, nil
}
// A ServerOption is a function which applies configuration to a Server.
type ServerOption func(*Server) error
// WithDebug enables Server debugging output to the supplied io.Writer.
func WithDebug(w io.Writer) ServerOption {
return func(s *Server) error {
s.debugStream = w
return nil
}
}
// ReadOnly configures a Server to serve files in read-only mode.
func ReadOnly() ServerOption {
return func(s *Server) error {
s.readOnly = true
return nil
}
}
// WithAllocator enable the allocator.
// After processing a packet we keep in memory the allocated slices
// and we reuse them for new packets.
// The allocator is experimental
func WithAllocator() ServerOption {
return func(s *Server) error {
alloc := newAllocator()
s.pktMgr.alloc = alloc
s.conn.alloc = alloc
return nil
}
}
type rxPacket struct {
pktType fxp
pktBytes []byte
}
// Up to N parallel servers
func (svr *Server) sftpServerWorker(pktChan chan orderedRequest) error {
for pkt := range pktChan {
// readonly checks
readonly := true
switch pkt := pkt.requestPacket.(type) {
case notReadOnly:
readonly = false
case *sshFxpOpenPacket:
readonly = pkt.readonly()
case *sshFxpExtendedPacket:
readonly = pkt.readonly()
}
// If server is operating read-only and a write operation is requested,
// return permission denied
if !readonly && svr.readOnly {
svr.pktMgr.readyPacket(
svr.pktMgr.newOrderedResponse(statusFromError(pkt.id(), syscall.EPERM), pkt.orderID()),
)
continue
}
if err := handlePacket(svr, pkt); err != nil {
return err
}
}
return nil
}
func handlePacket(s *Server, p orderedRequest) error {
var rpkt responsePacket
orderID := p.orderID()
switch p := p.requestPacket.(type) {
case *sshFxInitPacket:
rpkt = &sshFxVersionPacket{
Version: sftpProtocolVersion,
Extensions: sftpExtensions,
}
case *sshFxpStatPacket:
// stat the requested file
info, err := os.Stat(toLocalPath(p.Path))
rpkt = &sshFxpStatResponse{
ID: p.ID,
info: info,
}
if err != nil {
rpkt = statusFromError(p.ID, err)
}
case *sshFxpLstatPacket:
// stat the requested file
info, err := os.Lstat(toLocalPath(p.Path))
rpkt = &sshFxpStatResponse{
ID: p.ID,
info: info,
}
if err != nil {
rpkt = statusFromError(p.ID, err)
}
case *sshFxpFstatPacket:
f, ok := s.getHandle(p.Handle)
var err error = EBADF
var info os.FileInfo
if ok {
info, err = f.Stat()
rpkt = &sshFxpStatResponse{
ID: p.ID,
info: info,
}
}
if err != nil {
rpkt = statusFromError(p.ID, err)
}
case *sshFxpMkdirPacket:
// TODO FIXME: ignore flags field
err := os.Mkdir(toLocalPath(p.Path), 0755)
rpkt = statusFromError(p.ID, err)
case *sshFxpRmdirPacket:
err := os.Remove(toLocalPath(p.Path))
rpkt = statusFromError(p.ID, err)
case *sshFxpRemovePacket:
err := os.Remove(toLocalPath(p.Filename))
rpkt = statusFromError(p.ID, err)
case *sshFxpRenamePacket:
err := os.Rename(toLocalPath(p.Oldpath), toLocalPath(p.Newpath))
rpkt = statusFromError(p.ID, err)
case *sshFxpSymlinkPacket:
err := os.Symlink(toLocalPath(p.Targetpath), toLocalPath(p.Linkpath))
rpkt = statusFromError(p.ID, err)
case *sshFxpClosePacket:
rpkt = statusFromError(p.ID, s.closeHandle(p.Handle))
case *sshFxpReadlinkPacket:
f, err := os.Readlink(toLocalPath(p.Path))
rpkt = &sshFxpNamePacket{
ID: p.ID,
NameAttrs: []*sshFxpNameAttr{
{
Name: f,
LongName: f,
Attrs: emptyFileStat,
},
},
}
if err != nil {
rpkt = statusFromError(p.ID, err)
}
case *sshFxpRealpathPacket:
f, err := filepath.Abs(toLocalPath(p.Path))
f = cleanPath(f)
rpkt = &sshFxpNamePacket{
ID: p.ID,
NameAttrs: []*sshFxpNameAttr{
{
Name: f,
LongName: f,
Attrs: emptyFileStat,
},
},
}
if err != nil {
rpkt = statusFromError(p.ID, err)
}
case *sshFxpOpendirPacket:
p.Path = toLocalPath(p.Path)
if stat, err := os.Stat(p.Path); err != nil {
rpkt = statusFromError(p.ID, err)
} else if !stat.IsDir() {
rpkt = statusFromError(p.ID, &os.PathError{
Path: p.Path, Err: syscall.ENOTDIR})
} else {
rpkt = (&sshFxpOpenPacket{
ID: p.ID,
Path: p.Path,
Pflags: sshFxfRead,
}).respond(s)
}
case *sshFxpReadPacket:
var err error = EBADF
f, ok := s.getHandle(p.Handle)
if ok {
err = nil
data := p.getDataSlice(s.pktMgr.alloc, orderID)
n, _err := f.ReadAt(data, int64(p.Offset))
if _err != nil && (_err != io.EOF || n == 0) {
err = _err
}
rpkt = &sshFxpDataPacket{
ID: p.ID,
Length: uint32(n),
Data: data[:n],
// do not use data[:n:n] here to clamp the capacity, we allocated extra capacity above to avoid reallocations
}
}
if err != nil {
rpkt = statusFromError(p.ID, err)
}
case *sshFxpWritePacket:
f, ok := s.getHandle(p.Handle)
var err error = EBADF
if ok {
_, err = f.WriteAt(p.Data, int64(p.Offset))
}
rpkt = statusFromError(p.ID, err)
case *sshFxpExtendedPacket:
if p.SpecificPacket == nil {
rpkt = statusFromError(p.ID, ErrSSHFxOpUnsupported)
} else {
rpkt = p.respond(s)
}
case serverRespondablePacket:
rpkt = p.respond(s)
default:
return fmt.Errorf("unexpected packet type %T", p)
}
s.pktMgr.readyPacket(s.pktMgr.newOrderedResponse(rpkt, orderID))
return nil
}
// Serve serves SFTP connections until the streams stop or the SFTP subsystem
// is stopped.
func (svr *Server) Serve() error {
defer func() {
if svr.pktMgr.alloc != nil {
svr.pktMgr.alloc.Free()
}
}()
var wg sync.WaitGroup
runWorker := func(ch chan orderedRequest) {
wg.Add(1)
go func() {
defer wg.Done()
if err := svr.sftpServerWorker(ch); err != nil {
svr.conn.Close() // shuts down recvPacket
}
}()
}
pktChan := svr.pktMgr.workerChan(runWorker)
var err error
var pkt requestPacket
var pktType uint8
var pktBytes []byte
for {
pktType, pktBytes, err = svr.serverConn.recvPacket(svr.pktMgr.getNextOrderID())
if err != nil {
// we don't care about releasing allocated pages here, the server will quit and the allocator freed
break
}
pkt, err = makePacket(rxPacket{fxp(pktType), pktBytes})
if err != nil {
switch {
case errors.Is(err, errUnknownExtendedPacket):
//if err := svr.serverConn.sendError(pkt, ErrSshFxOpUnsupported); err != nil {
// debug("failed to send err packet: %v", err)
// svr.conn.Close() // shuts down recvPacket
// break
//}
default:
debug("makePacket err: %v", err)
svr.conn.Close() // shuts down recvPacket
break
}
}
pktChan <- svr.pktMgr.newOrderedRequest(pkt)
}
close(pktChan) // shuts down sftpServerWorkers
wg.Wait() // wait for all workers to exit
// close any still-open files
for handle, file := range svr.openFiles {
fmt.Fprintf(svr.debugStream, "sftp server file with handle %q left open: %v\n", handle, file.Name())
file.Close()
}
return err // error from recvPacket
}
type ider interface {
id() uint32
}
// The init packet has no ID, so we just return a zero-value ID
func (p *sshFxInitPacket) id() uint32 { return 0 }
type sshFxpStatResponse struct {
ID uint32
info os.FileInfo
}
func (p *sshFxpStatResponse) marshalPacket() ([]byte, []byte, error) {
l := 4 + 1 + 4 // uint32(length) + byte(type) + uint32(id)
b := make([]byte, 4, l)
b = append(b, sshFxpAttrs)
b = marshalUint32(b, p.ID)
var payload []byte
payload = marshalFileInfo(payload, p.info)
return b, payload, nil
}
func (p *sshFxpStatResponse) MarshalBinary() ([]byte, error) {
header, payload, err := p.marshalPacket()
return append(header, payload...), err
}
var emptyFileStat = []interface{}{uint32(0)}
func (p *sshFxpOpenPacket) readonly() bool {
return !p.hasPflags(sshFxfWrite)
}
func (p *sshFxpOpenPacket) hasPflags(flags ...uint32) bool {
for _, f := range flags {
if p.Pflags&f == 0 {
return false
}
}
return true
}
func (p *sshFxpOpenPacket) respond(svr *Server) responsePacket {
var osFlags int
if p.hasPflags(sshFxfRead, sshFxfWrite) {
osFlags |= os.O_RDWR
} else if p.hasPflags(sshFxfWrite) {
osFlags |= os.O_WRONLY
} else if p.hasPflags(sshFxfRead) {
osFlags |= os.O_RDONLY
} else {
// how are they opening?
return statusFromError(p.ID, syscall.EINVAL)
}
// Don't use O_APPEND flag as it conflicts with WriteAt.
// The sshFxfAppend flag is a no-op here as the client sends the offsets.
if p.hasPflags(sshFxfCreat) {
osFlags |= os.O_CREATE
}
if p.hasPflags(sshFxfTrunc) {
osFlags |= os.O_TRUNC
}
if p.hasPflags(sshFxfExcl) {
osFlags |= os.O_EXCL
}
f, err := os.OpenFile(toLocalPath(p.Path), osFlags, 0644)
if err != nil {
return statusFromError(p.ID, err)
}
handle := svr.nextHandle(f)
return &sshFxpHandlePacket{ID: p.ID, Handle: handle}
}
func (p *sshFxpReaddirPacket) respond(svr *Server) responsePacket {
f, ok := svr.getHandle(p.Handle)
if !ok {
return statusFromError(p.ID, EBADF)
}
dirents, err := f.Readdir(128)
if err != nil {
return statusFromError(p.ID, err)
}
idLookup := osIDLookup{}
ret := &sshFxpNamePacket{ID: p.ID}
for _, dirent := range dirents {
ret.NameAttrs = append(ret.NameAttrs, &sshFxpNameAttr{
Name: dirent.Name(),
LongName: runLs(idLookup, dirent),
Attrs: []interface{}{dirent},
})
}
return ret
}
func (p *sshFxpSetstatPacket) respond(svr *Server) responsePacket {
// additional unmarshalling is required for each possibility here
b := p.Attrs.([]byte)
var err error
p.Path = toLocalPath(p.Path)
debug("setstat name \"%s\"", p.Path)
if (p.Flags & sshFileXferAttrSize) != 0 {
var size uint64
if size, b, err = unmarshalUint64Safe(b); err == nil {
err = os.Truncate(p.Path, int64(size))
}
}
if (p.Flags & sshFileXferAttrPermissions) != 0 {
var mode uint32
if mode, b, err = unmarshalUint32Safe(b); err == nil {
err = os.Chmod(p.Path, os.FileMode(mode))
}
}
if (p.Flags & sshFileXferAttrACmodTime) != 0 {
var atime uint32
var mtime uint32
if atime, b, err = unmarshalUint32Safe(b); err != nil {
} else if mtime, b, err = unmarshalUint32Safe(b); err != nil {
} else {
atimeT := time.Unix(int64(atime), 0)
mtimeT := time.Unix(int64(mtime), 0)
err = os.Chtimes(p.Path, atimeT, mtimeT)
}
}
if (p.Flags & sshFileXferAttrUIDGID) != 0 {
var uid uint32
var gid uint32
if uid, b, err = unmarshalUint32Safe(b); err != nil {
} else if gid, _, err = unmarshalUint32Safe(b); err != nil {
} else {
err = os.Chown(p.Path, int(uid), int(gid))
}
}
return statusFromError(p.ID, err)
}
func (p *sshFxpFsetstatPacket) respond(svr *Server) responsePacket {
f, ok := svr.getHandle(p.Handle)
if !ok {
return statusFromError(p.ID, EBADF)
}
// additional unmarshalling is required for each possibility here
b := p.Attrs.([]byte)
var err error
debug("fsetstat name \"%s\"", f.Name())
if (p.Flags & sshFileXferAttrSize) != 0 {
var size uint64
if size, b, err = unmarshalUint64Safe(b); err == nil {
err = f.Truncate(int64(size))
}
}
if (p.Flags & sshFileXferAttrPermissions) != 0 {
var mode uint32
if mode, b, err = unmarshalUint32Safe(b); err == nil {
err = f.Chmod(os.FileMode(mode))
}
}
if (p.Flags & sshFileXferAttrACmodTime) != 0 {
var atime uint32
var mtime uint32
if atime, b, err = unmarshalUint32Safe(b); err != nil {
} else if mtime, b, err = unmarshalUint32Safe(b); err != nil {
} else {
atimeT := time.Unix(int64(atime), 0)
mtimeT := time.Unix(int64(mtime), 0)
err = os.Chtimes(f.Name(), atimeT, mtimeT)
}
}
if (p.Flags & sshFileXferAttrUIDGID) != 0 {
var uid uint32
var gid uint32
if uid, b, err = unmarshalUint32Safe(b); err != nil {
} else if gid, _, err = unmarshalUint32Safe(b); err != nil {
} else {
err = f.Chown(int(uid), int(gid))
}
}
return statusFromError(p.ID, err)
}
func statusFromError(id uint32, err error) *sshFxpStatusPacket {
ret := &sshFxpStatusPacket{
ID: id,
StatusError: StatusError{
// sshFXOk = 0
// sshFXEOF = 1
// sshFXNoSuchFile = 2 ENOENT
// sshFXPermissionDenied = 3
// sshFXFailure = 4
// sshFXBadMessage = 5
// sshFXNoConnection = 6
// sshFXConnectionLost = 7
// sshFXOPUnsupported = 8
Code: sshFxOk,
},
}
if err == nil {
return ret
}
debug("statusFromError: error is %T %#v", err, err)
ret.StatusError.Code = sshFxFailure
ret.StatusError.msg = err.Error()
if os.IsNotExist(err) {
ret.StatusError.Code = sshFxNoSuchFile
return ret
}
if code, ok := translateSyscallError(err); ok {
ret.StatusError.Code = code
return ret
}
switch e := err.(type) {
case fxerr:
ret.StatusError.Code = uint32(e)
default:
if e == io.EOF {
ret.StatusError.Code = sshFxEOF
}
}
return ret
}

21
vendor/github.com/pkg/sftp/server_statvfs_darwin.go generated vendored Normal file
View file

@ -0,0 +1,21 @@
package sftp
import (
"syscall"
)
func statvfsFromStatfst(stat *syscall.Statfs_t) (*StatVFS, error) {
return &StatVFS{
Bsize: uint64(stat.Bsize),
Frsize: uint64(stat.Bsize), // fragment size is a linux thing; use block size here
Blocks: stat.Blocks,
Bfree: stat.Bfree,
Bavail: stat.Bavail,
Files: stat.Files,
Ffree: stat.Ffree,
Favail: stat.Ffree, // not sure how to calculate Favail
Fsid: uint64(uint64(stat.Fsid.Val[1])<<32 | uint64(stat.Fsid.Val[0])), // endianness?
Flag: uint64(stat.Flags), // assuming POSIX?
Namemax: 1024, // man 2 statfs shows: #define MAXPATHLEN 1024
}, nil
}

29
vendor/github.com/pkg/sftp/server_statvfs_impl.go generated vendored Normal file
View file

@ -0,0 +1,29 @@
// +build darwin linux
// fill in statvfs structure with OS specific values
// Statfs_t is different per-kernel, and only exists on some unixes (not Solaris for instance)
package sftp
import (
"syscall"
)
func (p *sshFxpExtendedPacketStatVFS) respond(svr *Server) responsePacket {
retPkt, err := getStatVFSForPath(p.Path)
if err != nil {
return statusFromError(p.ID, err)
}
retPkt.ID = p.ID
return retPkt
}
func getStatVFSForPath(name string) (*StatVFS, error) {
var stat syscall.Statfs_t
if err := syscall.Statfs(name, &stat); err != nil {
return nil, err
}
return statvfsFromStatfst(&stat)
}

22
vendor/github.com/pkg/sftp/server_statvfs_linux.go generated vendored Normal file
View file

@ -0,0 +1,22 @@
// +build linux
package sftp
import (
"syscall"
)
func statvfsFromStatfst(stat *syscall.Statfs_t) (*StatVFS, error) {
return &StatVFS{
Bsize: uint64(stat.Bsize),
Frsize: uint64(stat.Frsize),
Blocks: stat.Blocks,
Bfree: stat.Bfree,
Bavail: stat.Bavail,
Files: stat.Files,
Ffree: stat.Ffree,
Favail: stat.Ffree, // not sure how to calculate Favail
Flag: uint64(stat.Flags), // assuming POSIX?
Namemax: uint64(stat.Namelen),
}, nil
}

13
vendor/github.com/pkg/sftp/server_statvfs_plan9.go generated vendored Normal file
View file

@ -0,0 +1,13 @@
package sftp
import (
"syscall"
)
func (p *sshFxpExtendedPacketStatVFS) respond(svr *Server) responsePacket {
return statusFromError(p.ID, syscall.EPLAN9)
}
func getStatVFSForPath(name string) (*StatVFS, error) {
return nil, syscall.EPLAN9
}

15
vendor/github.com/pkg/sftp/server_statvfs_stubs.go generated vendored Normal file
View file

@ -0,0 +1,15 @@
// +build !darwin,!linux,!plan9
package sftp
import (
"syscall"
)
func (p *sshFxpExtendedPacketStatVFS) respond(svr *Server) responsePacket {
return statusFromError(p.ID, syscall.ENOTSUP)
}
func getStatVFSForPath(name string) (*StatVFS, error) {
return nil, syscall.ENOTSUP
}

258
vendor/github.com/pkg/sftp/sftp.go generated vendored Normal file
View file

@ -0,0 +1,258 @@
// Package sftp implements the SSH File Transfer Protocol as described in
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02
package sftp
import (
"fmt"
)
const (
sshFxpInit = 1
sshFxpVersion = 2
sshFxpOpen = 3
sshFxpClose = 4
sshFxpRead = 5
sshFxpWrite = 6
sshFxpLstat = 7
sshFxpFstat = 8
sshFxpSetstat = 9
sshFxpFsetstat = 10
sshFxpOpendir = 11
sshFxpReaddir = 12
sshFxpRemove = 13
sshFxpMkdir = 14
sshFxpRmdir = 15
sshFxpRealpath = 16
sshFxpStat = 17
sshFxpRename = 18
sshFxpReadlink = 19
sshFxpSymlink = 20
sshFxpStatus = 101
sshFxpHandle = 102
sshFxpData = 103
sshFxpName = 104
sshFxpAttrs = 105
sshFxpExtended = 200
sshFxpExtendedReply = 201
)
const (
sshFxOk = 0
sshFxEOF = 1
sshFxNoSuchFile = 2
sshFxPermissionDenied = 3
sshFxFailure = 4
sshFxBadMessage = 5
sshFxNoConnection = 6
sshFxConnectionLost = 7
sshFxOPUnsupported = 8
// see draft-ietf-secsh-filexfer-13
// https://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-9.1
sshFxInvalidHandle = 9
sshFxNoSuchPath = 10
sshFxFileAlreadyExists = 11
sshFxWriteProtect = 12
sshFxNoMedia = 13
sshFxNoSpaceOnFilesystem = 14
sshFxQuotaExceeded = 15
sshFxUnknownPrincipal = 16
sshFxLockConflict = 17
sshFxDirNotEmpty = 18
sshFxNotADirectory = 19
sshFxInvalidFilename = 20
sshFxLinkLoop = 21
sshFxCannotDelete = 22
sshFxInvalidParameter = 23
sshFxFileIsADirectory = 24
sshFxByteRangeLockConflict = 25
sshFxByteRangeLockRefused = 26
sshFxDeletePending = 27
sshFxFileCorrupt = 28
sshFxOwnerInvalid = 29
sshFxGroupInvalid = 30
sshFxNoMatchingByteRangeLock = 31
)
const (
sshFxfRead = 0x00000001
sshFxfWrite = 0x00000002
sshFxfAppend = 0x00000004
sshFxfCreat = 0x00000008
sshFxfTrunc = 0x00000010
sshFxfExcl = 0x00000020
)
var (
// supportedSFTPExtensions defines the supported extensions
supportedSFTPExtensions = []sshExtensionPair{
{"hardlink@openssh.com", "1"},
{"posix-rename@openssh.com", "1"},
{"statvfs@openssh.com", "2"},
}
sftpExtensions = supportedSFTPExtensions
)
type fxp uint8
func (f fxp) String() string {
switch f {
case sshFxpInit:
return "SSH_FXP_INIT"
case sshFxpVersion:
return "SSH_FXP_VERSION"
case sshFxpOpen:
return "SSH_FXP_OPEN"
case sshFxpClose:
return "SSH_FXP_CLOSE"
case sshFxpRead:
return "SSH_FXP_READ"
case sshFxpWrite:
return "SSH_FXP_WRITE"
case sshFxpLstat:
return "SSH_FXP_LSTAT"
case sshFxpFstat:
return "SSH_FXP_FSTAT"
case sshFxpSetstat:
return "SSH_FXP_SETSTAT"
case sshFxpFsetstat:
return "SSH_FXP_FSETSTAT"
case sshFxpOpendir:
return "SSH_FXP_OPENDIR"
case sshFxpReaddir:
return "SSH_FXP_READDIR"
case sshFxpRemove:
return "SSH_FXP_REMOVE"
case sshFxpMkdir:
return "SSH_FXP_MKDIR"
case sshFxpRmdir:
return "SSH_FXP_RMDIR"
case sshFxpRealpath:
return "SSH_FXP_REALPATH"
case sshFxpStat:
return "SSH_FXP_STAT"
case sshFxpRename:
return "SSH_FXP_RENAME"
case sshFxpReadlink:
return "SSH_FXP_READLINK"
case sshFxpSymlink:
return "SSH_FXP_SYMLINK"
case sshFxpStatus:
return "SSH_FXP_STATUS"
case sshFxpHandle:
return "SSH_FXP_HANDLE"
case sshFxpData:
return "SSH_FXP_DATA"
case sshFxpName:
return "SSH_FXP_NAME"
case sshFxpAttrs:
return "SSH_FXP_ATTRS"
case sshFxpExtended:
return "SSH_FXP_EXTENDED"
case sshFxpExtendedReply:
return "SSH_FXP_EXTENDED_REPLY"
default:
return "unknown"
}
}
type fx uint8
func (f fx) String() string {
switch f {
case sshFxOk:
return "SSH_FX_OK"
case sshFxEOF:
return "SSH_FX_EOF"
case sshFxNoSuchFile:
return "SSH_FX_NO_SUCH_FILE"
case sshFxPermissionDenied:
return "SSH_FX_PERMISSION_DENIED"
case sshFxFailure:
return "SSH_FX_FAILURE"
case sshFxBadMessage:
return "SSH_FX_BAD_MESSAGE"
case sshFxNoConnection:
return "SSH_FX_NO_CONNECTION"
case sshFxConnectionLost:
return "SSH_FX_CONNECTION_LOST"
case sshFxOPUnsupported:
return "SSH_FX_OP_UNSUPPORTED"
default:
return "unknown"
}
}
type unexpectedPacketErr struct {
want, got uint8
}
func (u *unexpectedPacketErr) Error() string {
return fmt.Sprintf("sftp: unexpected packet: want %v, got %v", fxp(u.want), fxp(u.got))
}
func unimplementedPacketErr(u uint8) error {
return fmt.Errorf("sftp: unimplemented packet type: got %v", fxp(u))
}
type unexpectedIDErr struct{ want, got uint32 }
func (u *unexpectedIDErr) Error() string {
return fmt.Sprintf("sftp: unexpected id: want %d, got %d", u.want, u.got)
}
func unimplementedSeekWhence(whence int) error {
return fmt.Errorf("sftp: unimplemented seek whence %d", whence)
}
func unexpectedCount(want, got uint32) error {
return fmt.Errorf("sftp: unexpected count: want %d, got %d", want, got)
}
type unexpectedVersionErr struct{ want, got uint32 }
func (u *unexpectedVersionErr) Error() string {
return fmt.Sprintf("sftp: unexpected server version: want %v, got %v", u.want, u.got)
}
// A StatusError is returned when an SFTP operation fails, and provides
// additional information about the failure.
type StatusError struct {
Code uint32
msg, lang string
}
func (s *StatusError) Error() string {
return fmt.Sprintf("sftp: %q (%v)", s.msg, fx(s.Code))
}
// FxCode returns the error code typed to match against the exported codes
func (s *StatusError) FxCode() fxerr {
return fxerr(s.Code)
}
func getSupportedExtensionByName(extensionName string) (sshExtensionPair, error) {
for _, supportedExtension := range supportedSFTPExtensions {
if supportedExtension.Name == extensionName {
return supportedExtension, nil
}
}
return sshExtensionPair{}, fmt.Errorf("unsupported extension: %s", extensionName)
}
// SetSFTPExtensions allows to customize the supported server extensions.
// See the variable supportedSFTPExtensions for supported extensions.
// This method accepts a slice of sshExtensionPair names for example 'hardlink@openssh.com'.
// If an invalid extension is given an error will be returned and nothing will be changed
func SetSFTPExtensions(extensions ...string) error {
tempExtensions := []sshExtensionPair{}
for _, extension := range extensions {
sftpExtension, err := getSupportedExtensionByName(extension)
if err != nil {
return err
}
tempExtensions = append(tempExtensions, sftpExtension)
}
sftpExtensions = tempExtensions
return nil
}

103
vendor/github.com/pkg/sftp/stat_plan9.go generated vendored Normal file
View file

@ -0,0 +1,103 @@
package sftp
import (
"os"
"syscall"
)
var EBADF = syscall.NewError("fd out of range or not open")
func wrapPathError(filepath string, err error) error {
if errno, ok := err.(syscall.ErrorString); ok {
return &os.PathError{Path: filepath, Err: errno}
}
return err
}
// translateErrno translates a syscall error number to a SFTP error code.
func translateErrno(errno syscall.ErrorString) uint32 {
switch errno {
case "":
return sshFxOk
case syscall.ENOENT:
return sshFxNoSuchFile
case syscall.EPERM:
return sshFxPermissionDenied
}
return sshFxFailure
}
func translateSyscallError(err error) (uint32, bool) {
switch e := err.(type) {
case syscall.ErrorString:
return translateErrno(e), true
case *os.PathError:
debug("statusFromError,pathError: error is %T %#v", e.Err, e.Err)
if errno, ok := e.Err.(syscall.ErrorString); ok {
return translateErrno(errno), true
}
}
return 0, false
}
// isRegular returns true if the mode describes a regular file.
func isRegular(mode uint32) bool {
return mode&S_IFMT == syscall.S_IFREG
}
// toFileMode converts sftp filemode bits to the os.FileMode specification
func toFileMode(mode uint32) os.FileMode {
var fm = os.FileMode(mode & 0777)
switch mode & S_IFMT {
case syscall.S_IFBLK:
fm |= os.ModeDevice
case syscall.S_IFCHR:
fm |= os.ModeDevice | os.ModeCharDevice
case syscall.S_IFDIR:
fm |= os.ModeDir
case syscall.S_IFIFO:
fm |= os.ModeNamedPipe
case syscall.S_IFLNK:
fm |= os.ModeSymlink
case syscall.S_IFREG:
// nothing to do
case syscall.S_IFSOCK:
fm |= os.ModeSocket
}
return fm
}
// fromFileMode converts from the os.FileMode specification to sftp filemode bits
func fromFileMode(mode os.FileMode) uint32 {
ret := uint32(mode & os.ModePerm)
switch mode & os.ModeType {
case os.ModeDevice | os.ModeCharDevice:
ret |= syscall.S_IFCHR
case os.ModeDevice:
ret |= syscall.S_IFBLK
case os.ModeDir:
ret |= syscall.S_IFDIR
case os.ModeNamedPipe:
ret |= syscall.S_IFIFO
case os.ModeSymlink:
ret |= syscall.S_IFLNK
case 0:
ret |= syscall.S_IFREG
case os.ModeSocket:
ret |= syscall.S_IFSOCK
}
return ret
}
// Plan 9 doesn't have setuid, setgid or sticky, but a Plan 9 client should
// be able to send these bits to a POSIX server.
const (
s_ISUID = 04000
s_ISGID = 02000
s_ISVTX = 01000
)

123
vendor/github.com/pkg/sftp/stat_posix.go generated vendored Normal file
View file

@ -0,0 +1,123 @@
// +build !plan9
package sftp
import (
"os"
"syscall"
)
const EBADF = syscall.EBADF
func wrapPathError(filepath string, err error) error {
if errno, ok := err.(syscall.Errno); ok {
return &os.PathError{Path: filepath, Err: errno}
}
return err
}
// translateErrno translates a syscall error number to a SFTP error code.
func translateErrno(errno syscall.Errno) uint32 {
switch errno {
case 0:
return sshFxOk
case syscall.ENOENT:
return sshFxNoSuchFile
case syscall.EPERM:
return sshFxPermissionDenied
}
return sshFxFailure
}
func translateSyscallError(err error) (uint32, bool) {
switch e := err.(type) {
case syscall.Errno:
return translateErrno(e), true
case *os.PathError:
debug("statusFromError,pathError: error is %T %#v", e.Err, e.Err)
if errno, ok := e.Err.(syscall.Errno); ok {
return translateErrno(errno), true
}
}
return 0, false
}
// isRegular returns true if the mode describes a regular file.
func isRegular(mode uint32) bool {
return mode&S_IFMT == syscall.S_IFREG
}
// toFileMode converts sftp filemode bits to the os.FileMode specification
func toFileMode(mode uint32) os.FileMode {
var fm = os.FileMode(mode & 0777)
switch mode & S_IFMT {
case syscall.S_IFBLK:
fm |= os.ModeDevice
case syscall.S_IFCHR:
fm |= os.ModeDevice | os.ModeCharDevice
case syscall.S_IFDIR:
fm |= os.ModeDir
case syscall.S_IFIFO:
fm |= os.ModeNamedPipe
case syscall.S_IFLNK:
fm |= os.ModeSymlink
case syscall.S_IFREG:
// nothing to do
case syscall.S_IFSOCK:
fm |= os.ModeSocket
}
if mode&syscall.S_ISUID != 0 {
fm |= os.ModeSetuid
}
if mode&syscall.S_ISGID != 0 {
fm |= os.ModeSetgid
}
if mode&syscall.S_ISVTX != 0 {
fm |= os.ModeSticky
}
return fm
}
// fromFileMode converts from the os.FileMode specification to sftp filemode bits
func fromFileMode(mode os.FileMode) uint32 {
ret := uint32(mode & os.ModePerm)
switch mode & os.ModeType {
case os.ModeDevice | os.ModeCharDevice:
ret |= syscall.S_IFCHR
case os.ModeDevice:
ret |= syscall.S_IFBLK
case os.ModeDir:
ret |= syscall.S_IFDIR
case os.ModeNamedPipe:
ret |= syscall.S_IFIFO
case os.ModeSymlink:
ret |= syscall.S_IFLNK
case 0:
ret |= syscall.S_IFREG
case os.ModeSocket:
ret |= syscall.S_IFSOCK
}
if mode&os.ModeSetuid != 0 {
ret |= syscall.S_ISUID
}
if mode&os.ModeSetgid != 0 {
ret |= syscall.S_ISGID
}
if mode&os.ModeSticky != 0 {
ret |= syscall.S_ISVTX
}
return ret
}
const (
s_ISUID = syscall.S_ISUID
s_ISGID = syscall.S_ISGID
s_ISVTX = syscall.S_ISVTX
)

9
vendor/github.com/pkg/sftp/syscall_fixed.go generated vendored Normal file
View file

@ -0,0 +1,9 @@
// +build plan9 windows js,wasm
// Go defines S_IFMT on windows, plan9 and js/wasm as 0x1f000 instead of
// 0xf000. None of the the other S_IFxyz values include the "1" (in 0x1f000)
// which prevents them from matching the bitmask.
package sftp
const S_IFMT = 0xf000

8
vendor/github.com/pkg/sftp/syscall_good.go generated vendored Normal file
View file

@ -0,0 +1,8 @@
// +build !plan9,!windows
// +build !js !wasm
package sftp
import "syscall"
const S_IFMT = syscall.S_IFMT

159
vendor/golang.org/x/crypto/blowfish/block.go generated vendored Normal file
View file

@ -0,0 +1,159 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package blowfish
// getNextWord returns the next big-endian uint32 value from the byte slice
// at the given position in a circular manner, updating the position.
func getNextWord(b []byte, pos *int) uint32 {
var w uint32
j := *pos
for i := 0; i < 4; i++ {
w = w<<8 | uint32(b[j])
j++
if j >= len(b) {
j = 0
}
}
*pos = j
return w
}
// ExpandKey performs a key expansion on the given *Cipher. Specifically, it
// performs the Blowfish algorithm's key schedule which sets up the *Cipher's
// pi and substitution tables for calls to Encrypt. This is used, primarily,
// by the bcrypt package to reuse the Blowfish key schedule during its
// set up. It's unlikely that you need to use this directly.
func ExpandKey(key []byte, c *Cipher) {
j := 0
for i := 0; i < 18; i++ {
// Using inlined getNextWord for performance.
var d uint32
for k := 0; k < 4; k++ {
d = d<<8 | uint32(key[j])
j++
if j >= len(key) {
j = 0
}
}
c.p[i] ^= d
}
var l, r uint32
for i := 0; i < 18; i += 2 {
l, r = encryptBlock(l, r, c)
c.p[i], c.p[i+1] = l, r
}
for i := 0; i < 256; i += 2 {
l, r = encryptBlock(l, r, c)
c.s0[i], c.s0[i+1] = l, r
}
for i := 0; i < 256; i += 2 {
l, r = encryptBlock(l, r, c)
c.s1[i], c.s1[i+1] = l, r
}
for i := 0; i < 256; i += 2 {
l, r = encryptBlock(l, r, c)
c.s2[i], c.s2[i+1] = l, r
}
for i := 0; i < 256; i += 2 {
l, r = encryptBlock(l, r, c)
c.s3[i], c.s3[i+1] = l, r
}
}
// This is similar to ExpandKey, but folds the salt during the key
// schedule. While ExpandKey is essentially expandKeyWithSalt with an all-zero
// salt passed in, reusing ExpandKey turns out to be a place of inefficiency
// and specializing it here is useful.
func expandKeyWithSalt(key []byte, salt []byte, c *Cipher) {
j := 0
for i := 0; i < 18; i++ {
c.p[i] ^= getNextWord(key, &j)
}
j = 0
var l, r uint32
for i := 0; i < 18; i += 2 {
l ^= getNextWord(salt, &j)
r ^= getNextWord(salt, &j)
l, r = encryptBlock(l, r, c)
c.p[i], c.p[i+1] = l, r
}
for i := 0; i < 256; i += 2 {
l ^= getNextWord(salt, &j)
r ^= getNextWord(salt, &j)
l, r = encryptBlock(l, r, c)
c.s0[i], c.s0[i+1] = l, r
}
for i := 0; i < 256; i += 2 {
l ^= getNextWord(salt, &j)
r ^= getNextWord(salt, &j)
l, r = encryptBlock(l, r, c)
c.s1[i], c.s1[i+1] = l, r
}
for i := 0; i < 256; i += 2 {
l ^= getNextWord(salt, &j)
r ^= getNextWord(salt, &j)
l, r = encryptBlock(l, r, c)
c.s2[i], c.s2[i+1] = l, r
}
for i := 0; i < 256; i += 2 {
l ^= getNextWord(salt, &j)
r ^= getNextWord(salt, &j)
l, r = encryptBlock(l, r, c)
c.s3[i], c.s3[i+1] = l, r
}
}
func encryptBlock(l, r uint32, c *Cipher) (uint32, uint32) {
xl, xr := l, r
xl ^= c.p[0]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[1]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[2]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[3]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[4]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[5]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[6]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[7]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[8]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[9]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[10]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[11]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[12]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[13]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[14]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[15]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[16]
xr ^= c.p[17]
return xr, xl
}
func decryptBlock(l, r uint32, c *Cipher) (uint32, uint32) {
xl, xr := l, r
xl ^= c.p[17]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[16]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[15]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[14]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[13]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[12]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[11]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[10]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[9]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[8]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[7]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[6]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[5]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[4]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[3]
xr ^= ((c.s0[byte(xl>>24)] + c.s1[byte(xl>>16)]) ^ c.s2[byte(xl>>8)]) + c.s3[byte(xl)] ^ c.p[2]
xl ^= ((c.s0[byte(xr>>24)] + c.s1[byte(xr>>16)]) ^ c.s2[byte(xr>>8)]) + c.s3[byte(xr)] ^ c.p[1]
xr ^= c.p[0]
return xr, xl
}

99
vendor/golang.org/x/crypto/blowfish/cipher.go generated vendored Normal file
View file

@ -0,0 +1,99 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package blowfish implements Bruce Schneier's Blowfish encryption algorithm.
//
// Blowfish is a legacy cipher and its short block size makes it vulnerable to
// birthday bound attacks (see https://sweet32.info). It should only be used
// where compatibility with legacy systems, not security, is the goal.
//
// Deprecated: any new system should use AES (from crypto/aes, if necessary in
// an AEAD mode like crypto/cipher.NewGCM) or XChaCha20-Poly1305 (from
// golang.org/x/crypto/chacha20poly1305).
package blowfish // import "golang.org/x/crypto/blowfish"
// The code is a port of Bruce Schneier's C implementation.
// See https://www.schneier.com/blowfish.html.
import "strconv"
// The Blowfish block size in bytes.
const BlockSize = 8
// A Cipher is an instance of Blowfish encryption using a particular key.
type Cipher struct {
p [18]uint32
s0, s1, s2, s3 [256]uint32
}
type KeySizeError int
func (k KeySizeError) Error() string {
return "crypto/blowfish: invalid key size " + strconv.Itoa(int(k))
}
// NewCipher creates and returns a Cipher.
// The key argument should be the Blowfish key, from 1 to 56 bytes.
func NewCipher(key []byte) (*Cipher, error) {
var result Cipher
if k := len(key); k < 1 || k > 56 {
return nil, KeySizeError(k)
}
initCipher(&result)
ExpandKey(key, &result)
return &result, nil
}
// NewSaltedCipher creates a returns a Cipher that folds a salt into its key
// schedule. For most purposes, NewCipher, instead of NewSaltedCipher, is
// sufficient and desirable. For bcrypt compatibility, the key can be over 56
// bytes.
func NewSaltedCipher(key, salt []byte) (*Cipher, error) {
if len(salt) == 0 {
return NewCipher(key)
}
var result Cipher
if k := len(key); k < 1 {
return nil, KeySizeError(k)
}
initCipher(&result)
expandKeyWithSalt(key, salt, &result)
return &result, nil
}
// BlockSize returns the Blowfish block size, 8 bytes.
// It is necessary to satisfy the Block interface in the
// package "crypto/cipher".
func (c *Cipher) BlockSize() int { return BlockSize }
// Encrypt encrypts the 8-byte buffer src using the key k
// and stores the result in dst.
// Note that for amounts of data larger than a block,
// it is not safe to just call Encrypt on successive blocks;
// instead, use an encryption mode like CBC (see crypto/cipher/cbc.go).
func (c *Cipher) Encrypt(dst, src []byte) {
l := uint32(src[0])<<24 | uint32(src[1])<<16 | uint32(src[2])<<8 | uint32(src[3])
r := uint32(src[4])<<24 | uint32(src[5])<<16 | uint32(src[6])<<8 | uint32(src[7])
l, r = encryptBlock(l, r, c)
dst[0], dst[1], dst[2], dst[3] = byte(l>>24), byte(l>>16), byte(l>>8), byte(l)
dst[4], dst[5], dst[6], dst[7] = byte(r>>24), byte(r>>16), byte(r>>8), byte(r)
}
// Decrypt decrypts the 8-byte buffer src using the key k
// and stores the result in dst.
func (c *Cipher) Decrypt(dst, src []byte) {
l := uint32(src[0])<<24 | uint32(src[1])<<16 | uint32(src[2])<<8 | uint32(src[3])
r := uint32(src[4])<<24 | uint32(src[5])<<16 | uint32(src[6])<<8 | uint32(src[7])
l, r = decryptBlock(l, r, c)
dst[0], dst[1], dst[2], dst[3] = byte(l>>24), byte(l>>16), byte(l>>8), byte(l)
dst[4], dst[5], dst[6], dst[7] = byte(r>>24), byte(r>>16), byte(r>>8), byte(r)
}
func initCipher(c *Cipher) {
copy(c.p[0:], p[0:])
copy(c.s0[0:], s0[0:])
copy(c.s1[0:], s1[0:])
copy(c.s2[0:], s2[0:])
copy(c.s3[0:], s3[0:])
}

199
vendor/golang.org/x/crypto/blowfish/const.go generated vendored Normal file
View file

@ -0,0 +1,199 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// The startup permutation array and substitution boxes.
// They are the hexadecimal digits of PI; see:
// https://www.schneier.com/code/constants.txt.
package blowfish
var s0 = [256]uint32{
0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7, 0xb8e1afed, 0x6a267e96,
0xba7c9045, 0xf12c7f99, 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e, 0x0d95748f, 0x728eb658,
0x718bcd58, 0x82154aee, 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef, 0x8e79dcb0, 0x603a180e,
0x6c9e0e8b, 0xb01e8a3e, 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440, 0x55ca396a, 0x2aab10b6,
0xb4cc5c34, 0x1141e8ce, 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e, 0xafd6ba33, 0x6c24cf5c,
0x7a325381, 0x28958677, 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032, 0xef845d5d, 0xe98575b1,
0xdc262302, 0xeb651b88, 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e, 0x21c66842, 0xf6e96c9a,
0x670c9c61, 0xabd388f0, 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98, 0xa1f1651d, 0x39af0176,
0x66ca593e, 0x82430e88, 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6, 0x4ed3aa62, 0x363f7706,
0x1bfedf72, 0x429b023d, 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7, 0xe3fe501a, 0xb6794c3b,
0x976ce0bd, 0x04c006ba, 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f, 0x6dfc511f, 0x9b30952c,
0xcc814544, 0xaf5ebd09, 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb, 0x5579c0bd, 0x1a60320a,
0xd6a100c6, 0x402c7279, 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab, 0x323db5fa, 0xfd238760,
0x53317b48, 0x3e00df82, 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573, 0x695b27b0, 0xbbca58c8,
0xe1ffa35d, 0xb8f011a0, 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790, 0xe1ddf2da, 0xa4cb7e33,
0x62fb1341, 0xcee4c6e8, 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0, 0xd08ed1d0, 0xafc725e0,
0x8e3c5b2f, 0x8e7594b7, 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad, 0x2f2f2218, 0xbe0e1777,
0xea752dfe, 0x8b021fa1, 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9, 0x165fa266, 0x80957705,
0x93cc7314, 0x211a1477, 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49, 0x00250e2d, 0x2071b35e,
0x226800bb, 0x57b8e0af, 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5, 0x83260376, 0x6295cfa9,
0x11c81968, 0x4e734a41, 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400, 0x08ba6fb5, 0x571be91f,
0xf296ec6b, 0x2a0dd915, 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a,
}
var s1 = [256]uint32{
0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623, 0xad6ea6b0, 0x49a7df7d,
0x9cee60b8, 0x8fedb266, 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e, 0x3f54989a, 0x5b429d65,
0x6b8fe4d6, 0x99f73fd6, 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e, 0x09686b3f, 0x3ebaefc9,
0x3c971814, 0x6b6a70a1, 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8, 0xb03ada37, 0xf0500c0d,
0xf01c1f04, 0x0200b3ff, 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701, 0x3ae5e581, 0x37c2dadc,
0xc8b57634, 0x9af3dda7, 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331, 0x4e548b38, 0x4f6db908,
0x6f420d03, 0xf60a04bf, 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e, 0x5512721f, 0x2e6b7124,
0x501adde6, 0x9f84cd87, 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2, 0xef1c1847, 0x3215d908,
0xdd433b37, 0x24c2ba16, 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b, 0x043556f1, 0xd7a3c76b,
0x3c11183b, 0x5924a509, 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3, 0x771fe71c, 0x4e3d06fa,
0x2965dcb9, 0x99e71d0f, 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4, 0xf2f74ea7, 0x361d2b3d,
0x1939260f, 0x19c27960, 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28, 0xc332ddef, 0xbe6c5aa5,
0x65582185, 0x68ab9802, 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510, 0x13cca830, 0xeb61bd96,
0x0334fe1e, 0xaa0363cf, 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e, 0x648b1eaf, 0x19bdf0ca,
0xa02369b9, 0x655abb50, 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8, 0xf837889a, 0x97e32d77,
0x11ed935f, 0x16681281, 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696, 0xcdb30aeb, 0x532e3054,
0x8fd948e4, 0x6dbc3128, 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0, 0x45eee2b6, 0xa3aaabea,
0xdb6c4f15, 0xfacb4fd0, 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250, 0xcf62a1f2, 0x5b8d2646,
0xfc8883a0, 0xc1c7b6a3, 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00, 0x58428d2a, 0x0c55f5ea,
0x1dadf43e, 0x233f7061, 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e, 0xa6078084, 0x19f8509e,
0xe8efd855, 0x61d99735, 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9, 0xdb73dbd3, 0x105588cd,
0x675fda79, 0xe3674340, 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7,
}
var s2 = [256]uint32{
0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934, 0x411520f7, 0x7602d4f7,
0xbcf46b2e, 0xd4a20068, 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840, 0x4d95fc1d, 0x96b591af,
0x70f4ddd3, 0x66a02f45, 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a, 0x28507825, 0x530429f4,
0x0a2c86da, 0xe9b66dfb, 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6, 0xaace1e7c, 0xd3375fec,
0xce78a399, 0x406b2a42, 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2, 0x3a6efa74, 0xdd5b4332,
0x6841e7f7, 0xca7820fb, 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b, 0x55a867bc, 0xa1159a58,
0xcca92963, 0x99e1db33, 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3, 0x95c11548, 0xe4c66d22,
0x48c1133f, 0xc70f86dc, 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564, 0x257b7834, 0x602a9c60,
0xdff8e8a3, 0x1f636c1b, 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922, 0x85b2a20e, 0xe6ba0d99,
0xde720c8c, 0x2da2f728, 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e, 0x0a476341, 0x992eff74,
0x3a6f6eab, 0xf4f8fd37, 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804, 0xf1290dc7, 0xcc00ffa3,
0xb5390f92, 0x690fed0b, 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb, 0x37392eb3, 0xcc115979,
0x8026e297, 0xf42e312d, 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350, 0x1a6b1018, 0x11caedfa,
0x3d25bdd8, 0xe2e1c3c9, 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe, 0x9dbc8057, 0xf0f7c086,
0x60787bf8, 0x6003604d, 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f, 0x77a057be, 0xbde8ae24,
0x55464299, 0xbf582e61, 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9, 0x7aeb2661, 0x8b1ddf84,
0x846a0e79, 0x915f95e2, 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e, 0xb77f19b6, 0xe0a9dc09,
0x662d09a1, 0xc4324633, 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169, 0xdcb7da83, 0x573906fe,
0xa1e2ce9b, 0x4fcd7f52, 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5, 0xf0177a28, 0xc0f586e0,
0x006058aa, 0x30dc7d62, 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76, 0x6f05e409, 0x4b7c0188,
0x39720a3d, 0x7c927c24, 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4, 0x1e50ef5e, 0xb161e6f8,
0xa28514d9, 0x6c51133c, 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0,
}
var s3 = [256]uint32{
0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b, 0x5cb0679e, 0x4fa33742,
0xd3822740, 0x99bc9bbe, 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4, 0x5748ab2f, 0xbc946e79,
0xc6a376d2, 0x6549c2c8, 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304, 0xa1fad5f0, 0x6a2d519a,
0x63ef8ce2, 0x9a86ee22, 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6, 0x2826a2f9, 0xa73a3ae1,
0x4ba99586, 0xef5562e9, 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593, 0xe990fd5a, 0x9e34d797,
0x2cf0b7d9, 0x022b8b51, 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c, 0xe029ac71, 0xe019a5e6,
0x47b0acfd, 0xed93fa9b, 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c, 0x15056dd4, 0x88f46dba,
0x03a16125, 0x0564f0bd, 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319, 0x7533d928, 0xb155fdf5,
0x03563482, 0x8aba3cbb, 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991, 0xea7a90c2, 0xfb3e7bce,
0x5121ce64, 0x774fbe32, 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166, 0xb39a460a, 0x6445c0dd,
0x586cdecf, 0x1c20c8ae, 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5, 0x72eacea8, 0xfa6484bb,
0x8d6612ae, 0xbf3c6f47, 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d, 0x4040cb08, 0x4eb4e2cc,
0x34d2466a, 0x0115af84, 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8, 0x611560b1, 0xe7933fdc,
0xbb3a792b, 0x344525bd, 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7, 0x1a908749, 0xd44fbd9a,
0xd0dadecb, 0xd50ada38, 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c, 0xbf97222c, 0x15e6fc2a,
0x0f91fc71, 0x9b941525, 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442, 0xe0ec6e0e, 0x1698db3b,
0x4c98a0be, 0x3278e964, 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8, 0xdf359f8d, 0x9b992f2e,
0xe60b6f47, 0x0fe3f11d, 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299, 0xf523f357, 0xa6327623,
0x93a83531, 0x56cccd02, 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614, 0xe6c6c7bd, 0x327a140a,
0x45e1d006, 0xc3f27b9a, 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b, 0x53113ec0, 0x1640e3d3,
0x38abbd60, 0x2547adf0, 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e, 0x1948c25c, 0x02fb8a8c,
0x01c36ae4, 0xd6ebe1f9, 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6,
}
var p = [18]uint32{
0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, 0xa4093822, 0x299f31d0,
0x082efa98, 0xec4e6c89, 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917, 0x9216d5d9, 0x8979fb1b,
}

17
vendor/golang.org/x/crypto/chacha20/chacha_arm64.go generated vendored Normal file
View file

@ -0,0 +1,17 @@
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build go1.11 && gc && !purego
// +build go1.11,gc,!purego
package chacha20
const bufSize = 256
//go:noescape
func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32)
func (c *Cipher) xorKeyStreamBlocks(dst, src []byte) {
xorKeyStreamVX(dst, src, &c.key, &c.nonce, &c.counter)
}

308
vendor/golang.org/x/crypto/chacha20/chacha_arm64.s generated vendored Normal file
View file

@ -0,0 +1,308 @@
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build go1.11 && gc && !purego
// +build go1.11,gc,!purego
#include "textflag.h"
#define NUM_ROUNDS 10
// func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32)
TEXT ·xorKeyStreamVX(SB), NOSPLIT, $0
MOVD dst+0(FP), R1
MOVD src+24(FP), R2
MOVD src_len+32(FP), R3
MOVD key+48(FP), R4
MOVD nonce+56(FP), R6
MOVD counter+64(FP), R7
MOVD $·constants(SB), R10
MOVD $·incRotMatrix(SB), R11
MOVW (R7), R20
AND $~255, R3, R13
ADD R2, R13, R12 // R12 for block end
AND $255, R3, R13
loop:
MOVD $NUM_ROUNDS, R21
VLD1 (R11), [V30.S4, V31.S4]
// load contants
// VLD4R (R10), [V0.S4, V1.S4, V2.S4, V3.S4]
WORD $0x4D60E940
// load keys
// VLD4R 16(R4), [V4.S4, V5.S4, V6.S4, V7.S4]
WORD $0x4DFFE884
// VLD4R 16(R4), [V8.S4, V9.S4, V10.S4, V11.S4]
WORD $0x4DFFE888
SUB $32, R4
// load counter + nonce
// VLD1R (R7), [V12.S4]
WORD $0x4D40C8EC
// VLD3R (R6), [V13.S4, V14.S4, V15.S4]
WORD $0x4D40E8CD
// update counter
VADD V30.S4, V12.S4, V12.S4
chacha:
// V0..V3 += V4..V7
// V12..V15 <<<= ((V12..V15 XOR V0..V3), 16)
VADD V0.S4, V4.S4, V0.S4
VADD V1.S4, V5.S4, V1.S4
VADD V2.S4, V6.S4, V2.S4
VADD V3.S4, V7.S4, V3.S4
VEOR V12.B16, V0.B16, V12.B16
VEOR V13.B16, V1.B16, V13.B16
VEOR V14.B16, V2.B16, V14.B16
VEOR V15.B16, V3.B16, V15.B16
VREV32 V12.H8, V12.H8
VREV32 V13.H8, V13.H8
VREV32 V14.H8, V14.H8
VREV32 V15.H8, V15.H8
// V8..V11 += V12..V15
// V4..V7 <<<= ((V4..V7 XOR V8..V11), 12)
VADD V8.S4, V12.S4, V8.S4
VADD V9.S4, V13.S4, V9.S4
VADD V10.S4, V14.S4, V10.S4
VADD V11.S4, V15.S4, V11.S4
VEOR V8.B16, V4.B16, V16.B16
VEOR V9.B16, V5.B16, V17.B16
VEOR V10.B16, V6.B16, V18.B16
VEOR V11.B16, V7.B16, V19.B16
VSHL $12, V16.S4, V4.S4
VSHL $12, V17.S4, V5.S4
VSHL $12, V18.S4, V6.S4
VSHL $12, V19.S4, V7.S4
VSRI $20, V16.S4, V4.S4
VSRI $20, V17.S4, V5.S4
VSRI $20, V18.S4, V6.S4
VSRI $20, V19.S4, V7.S4
// V0..V3 += V4..V7
// V12..V15 <<<= ((V12..V15 XOR V0..V3), 8)
VADD V0.S4, V4.S4, V0.S4
VADD V1.S4, V5.S4, V1.S4
VADD V2.S4, V6.S4, V2.S4
VADD V3.S4, V7.S4, V3.S4
VEOR V12.B16, V0.B16, V12.B16
VEOR V13.B16, V1.B16, V13.B16
VEOR V14.B16, V2.B16, V14.B16
VEOR V15.B16, V3.B16, V15.B16
VTBL V31.B16, [V12.B16], V12.B16
VTBL V31.B16, [V13.B16], V13.B16
VTBL V31.B16, [V14.B16], V14.B16
VTBL V31.B16, [V15.B16], V15.B16
// V8..V11 += V12..V15
// V4..V7 <<<= ((V4..V7 XOR V8..V11), 7)
VADD V12.S4, V8.S4, V8.S4
VADD V13.S4, V9.S4, V9.S4
VADD V14.S4, V10.S4, V10.S4
VADD V15.S4, V11.S4, V11.S4
VEOR V8.B16, V4.B16, V16.B16
VEOR V9.B16, V5.B16, V17.B16
VEOR V10.B16, V6.B16, V18.B16
VEOR V11.B16, V7.B16, V19.B16
VSHL $7, V16.S4, V4.S4
VSHL $7, V17.S4, V5.S4
VSHL $7, V18.S4, V6.S4
VSHL $7, V19.S4, V7.S4
VSRI $25, V16.S4, V4.S4
VSRI $25, V17.S4, V5.S4
VSRI $25, V18.S4, V6.S4
VSRI $25, V19.S4, V7.S4
// V0..V3 += V5..V7, V4
// V15,V12-V14 <<<= ((V15,V12-V14 XOR V0..V3), 16)
VADD V0.S4, V5.S4, V0.S4
VADD V1.S4, V6.S4, V1.S4
VADD V2.S4, V7.S4, V2.S4
VADD V3.S4, V4.S4, V3.S4
VEOR V15.B16, V0.B16, V15.B16
VEOR V12.B16, V1.B16, V12.B16
VEOR V13.B16, V2.B16, V13.B16
VEOR V14.B16, V3.B16, V14.B16
VREV32 V12.H8, V12.H8
VREV32 V13.H8, V13.H8
VREV32 V14.H8, V14.H8
VREV32 V15.H8, V15.H8
// V10 += V15; V5 <<<= ((V10 XOR V5), 12)
// ...
VADD V15.S4, V10.S4, V10.S4
VADD V12.S4, V11.S4, V11.S4
VADD V13.S4, V8.S4, V8.S4
VADD V14.S4, V9.S4, V9.S4
VEOR V10.B16, V5.B16, V16.B16
VEOR V11.B16, V6.B16, V17.B16
VEOR V8.B16, V7.B16, V18.B16
VEOR V9.B16, V4.B16, V19.B16
VSHL $12, V16.S4, V5.S4
VSHL $12, V17.S4, V6.S4
VSHL $12, V18.S4, V7.S4
VSHL $12, V19.S4, V4.S4
VSRI $20, V16.S4, V5.S4
VSRI $20, V17.S4, V6.S4
VSRI $20, V18.S4, V7.S4
VSRI $20, V19.S4, V4.S4
// V0 += V5; V15 <<<= ((V0 XOR V15), 8)
// ...
VADD V5.S4, V0.S4, V0.S4
VADD V6.S4, V1.S4, V1.S4
VADD V7.S4, V2.S4, V2.S4
VADD V4.S4, V3.S4, V3.S4
VEOR V0.B16, V15.B16, V15.B16
VEOR V1.B16, V12.B16, V12.B16
VEOR V2.B16, V13.B16, V13.B16
VEOR V3.B16, V14.B16, V14.B16
VTBL V31.B16, [V12.B16], V12.B16
VTBL V31.B16, [V13.B16], V13.B16
VTBL V31.B16, [V14.B16], V14.B16
VTBL V31.B16, [V15.B16], V15.B16
// V10 += V15; V5 <<<= ((V10 XOR V5), 7)
// ...
VADD V15.S4, V10.S4, V10.S4
VADD V12.S4, V11.S4, V11.S4
VADD V13.S4, V8.S4, V8.S4
VADD V14.S4, V9.S4, V9.S4
VEOR V10.B16, V5.B16, V16.B16
VEOR V11.B16, V6.B16, V17.B16
VEOR V8.B16, V7.B16, V18.B16
VEOR V9.B16, V4.B16, V19.B16
VSHL $7, V16.S4, V5.S4
VSHL $7, V17.S4, V6.S4
VSHL $7, V18.S4, V7.S4
VSHL $7, V19.S4, V4.S4
VSRI $25, V16.S4, V5.S4
VSRI $25, V17.S4, V6.S4
VSRI $25, V18.S4, V7.S4
VSRI $25, V19.S4, V4.S4
SUB $1, R21
CBNZ R21, chacha
// VLD4R (R10), [V16.S4, V17.S4, V18.S4, V19.S4]
WORD $0x4D60E950
// VLD4R 16(R4), [V20.S4, V21.S4, V22.S4, V23.S4]
WORD $0x4DFFE894
VADD V30.S4, V12.S4, V12.S4
VADD V16.S4, V0.S4, V0.S4
VADD V17.S4, V1.S4, V1.S4
VADD V18.S4, V2.S4, V2.S4
VADD V19.S4, V3.S4, V3.S4
// VLD4R 16(R4), [V24.S4, V25.S4, V26.S4, V27.S4]
WORD $0x4DFFE898
// restore R4
SUB $32, R4
// load counter + nonce
// VLD1R (R7), [V28.S4]
WORD $0x4D40C8FC
// VLD3R (R6), [V29.S4, V30.S4, V31.S4]
WORD $0x4D40E8DD
VADD V20.S4, V4.S4, V4.S4
VADD V21.S4, V5.S4, V5.S4
VADD V22.S4, V6.S4, V6.S4
VADD V23.S4, V7.S4, V7.S4
VADD V24.S4, V8.S4, V8.S4
VADD V25.S4, V9.S4, V9.S4
VADD V26.S4, V10.S4, V10.S4
VADD V27.S4, V11.S4, V11.S4
VADD V28.S4, V12.S4, V12.S4
VADD V29.S4, V13.S4, V13.S4
VADD V30.S4, V14.S4, V14.S4
VADD V31.S4, V15.S4, V15.S4
VZIP1 V1.S4, V0.S4, V16.S4
VZIP2 V1.S4, V0.S4, V17.S4
VZIP1 V3.S4, V2.S4, V18.S4
VZIP2 V3.S4, V2.S4, V19.S4
VZIP1 V5.S4, V4.S4, V20.S4
VZIP2 V5.S4, V4.S4, V21.S4
VZIP1 V7.S4, V6.S4, V22.S4
VZIP2 V7.S4, V6.S4, V23.S4
VZIP1 V9.S4, V8.S4, V24.S4
VZIP2 V9.S4, V8.S4, V25.S4
VZIP1 V11.S4, V10.S4, V26.S4
VZIP2 V11.S4, V10.S4, V27.S4
VZIP1 V13.S4, V12.S4, V28.S4
VZIP2 V13.S4, V12.S4, V29.S4
VZIP1 V15.S4, V14.S4, V30.S4
VZIP2 V15.S4, V14.S4, V31.S4
VZIP1 V18.D2, V16.D2, V0.D2
VZIP2 V18.D2, V16.D2, V4.D2
VZIP1 V19.D2, V17.D2, V8.D2
VZIP2 V19.D2, V17.D2, V12.D2
VLD1.P 64(R2), [V16.B16, V17.B16, V18.B16, V19.B16]
VZIP1 V22.D2, V20.D2, V1.D2
VZIP2 V22.D2, V20.D2, V5.D2
VZIP1 V23.D2, V21.D2, V9.D2
VZIP2 V23.D2, V21.D2, V13.D2
VLD1.P 64(R2), [V20.B16, V21.B16, V22.B16, V23.B16]
VZIP1 V26.D2, V24.D2, V2.D2
VZIP2 V26.D2, V24.D2, V6.D2
VZIP1 V27.D2, V25.D2, V10.D2
VZIP2 V27.D2, V25.D2, V14.D2
VLD1.P 64(R2), [V24.B16, V25.B16, V26.B16, V27.B16]
VZIP1 V30.D2, V28.D2, V3.D2
VZIP2 V30.D2, V28.D2, V7.D2
VZIP1 V31.D2, V29.D2, V11.D2
VZIP2 V31.D2, V29.D2, V15.D2
VLD1.P 64(R2), [V28.B16, V29.B16, V30.B16, V31.B16]
VEOR V0.B16, V16.B16, V16.B16
VEOR V1.B16, V17.B16, V17.B16
VEOR V2.B16, V18.B16, V18.B16
VEOR V3.B16, V19.B16, V19.B16
VST1.P [V16.B16, V17.B16, V18.B16, V19.B16], 64(R1)
VEOR V4.B16, V20.B16, V20.B16
VEOR V5.B16, V21.B16, V21.B16
VEOR V6.B16, V22.B16, V22.B16
VEOR V7.B16, V23.B16, V23.B16
VST1.P [V20.B16, V21.B16, V22.B16, V23.B16], 64(R1)
VEOR V8.B16, V24.B16, V24.B16
VEOR V9.B16, V25.B16, V25.B16
VEOR V10.B16, V26.B16, V26.B16
VEOR V11.B16, V27.B16, V27.B16
VST1.P [V24.B16, V25.B16, V26.B16, V27.B16], 64(R1)
VEOR V12.B16, V28.B16, V28.B16
VEOR V13.B16, V29.B16, V29.B16
VEOR V14.B16, V30.B16, V30.B16
VEOR V15.B16, V31.B16, V31.B16
VST1.P [V28.B16, V29.B16, V30.B16, V31.B16], 64(R1)
ADD $4, R20
MOVW R20, (R7) // update counter
CMP R2, R12
BGT loop
RET
DATA ·constants+0x00(SB)/4, $0x61707865
DATA ·constants+0x04(SB)/4, $0x3320646e
DATA ·constants+0x08(SB)/4, $0x79622d32
DATA ·constants+0x0c(SB)/4, $0x6b206574
GLOBL ·constants(SB), NOPTR|RODATA, $32
DATA ·incRotMatrix+0x00(SB)/4, $0x00000000
DATA ·incRotMatrix+0x04(SB)/4, $0x00000001
DATA ·incRotMatrix+0x08(SB)/4, $0x00000002
DATA ·incRotMatrix+0x0c(SB)/4, $0x00000003
DATA ·incRotMatrix+0x10(SB)/4, $0x02010003
DATA ·incRotMatrix+0x14(SB)/4, $0x06050407
DATA ·incRotMatrix+0x18(SB)/4, $0x0A09080B
DATA ·incRotMatrix+0x1c(SB)/4, $0x0E0D0C0F
GLOBL ·incRotMatrix(SB), NOPTR|RODATA, $32

398
vendor/golang.org/x/crypto/chacha20/chacha_generic.go generated vendored Normal file
View file

@ -0,0 +1,398 @@
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package chacha20 implements the ChaCha20 and XChaCha20 encryption algorithms
// as specified in RFC 8439 and draft-irtf-cfrg-xchacha-01.
package chacha20
import (
"crypto/cipher"
"encoding/binary"
"errors"
"math/bits"
"golang.org/x/crypto/internal/subtle"
)
const (
// KeySize is the size of the key used by this cipher, in bytes.
KeySize = 32
// NonceSize is the size of the nonce used with the standard variant of this
// cipher, in bytes.
//
// Note that this is too short to be safely generated at random if the same
// key is reused more than 2³² times.
NonceSize = 12
// NonceSizeX is the size of the nonce used with the XChaCha20 variant of
// this cipher, in bytes.
NonceSizeX = 24
)
// Cipher is a stateful instance of ChaCha20 or XChaCha20 using a particular key
// and nonce. A *Cipher implements the cipher.Stream interface.
type Cipher struct {
// The ChaCha20 state is 16 words: 4 constant, 8 of key, 1 of counter
// (incremented after each block), and 3 of nonce.
key [8]uint32
counter uint32
nonce [3]uint32
// The last len bytes of buf are leftover key stream bytes from the previous
// XORKeyStream invocation. The size of buf depends on how many blocks are
// computed at a time by xorKeyStreamBlocks.
buf [bufSize]byte
len int
// overflow is set when the counter overflowed, no more blocks can be
// generated, and the next XORKeyStream call should panic.
overflow bool
// The counter-independent results of the first round are cached after they
// are computed the first time.
precompDone bool
p1, p5, p9, p13 uint32
p2, p6, p10, p14 uint32
p3, p7, p11, p15 uint32
}
var _ cipher.Stream = (*Cipher)(nil)
// NewUnauthenticatedCipher creates a new ChaCha20 stream cipher with the given
// 32 bytes key and a 12 or 24 bytes nonce. If a nonce of 24 bytes is provided,
// the XChaCha20 construction will be used. It returns an error if key or nonce
// have any other length.
//
// Note that ChaCha20, like all stream ciphers, is not authenticated and allows
// attackers to silently tamper with the plaintext. For this reason, it is more
// appropriate as a building block than as a standalone encryption mechanism.
// Instead, consider using package golang.org/x/crypto/chacha20poly1305.
func NewUnauthenticatedCipher(key, nonce []byte) (*Cipher, error) {
// This function is split into a wrapper so that the Cipher allocation will
// be inlined, and depending on how the caller uses the return value, won't
// escape to the heap.
c := &Cipher{}
return newUnauthenticatedCipher(c, key, nonce)
}
func newUnauthenticatedCipher(c *Cipher, key, nonce []byte) (*Cipher, error) {
if len(key) != KeySize {
return nil, errors.New("chacha20: wrong key size")
}
if len(nonce) == NonceSizeX {
// XChaCha20 uses the ChaCha20 core to mix 16 bytes of the nonce into a
// derived key, allowing it to operate on a nonce of 24 bytes. See
// draft-irtf-cfrg-xchacha-01, Section 2.3.
key, _ = HChaCha20(key, nonce[0:16])
cNonce := make([]byte, NonceSize)
copy(cNonce[4:12], nonce[16:24])
nonce = cNonce
} else if len(nonce) != NonceSize {
return nil, errors.New("chacha20: wrong nonce size")
}
key, nonce = key[:KeySize], nonce[:NonceSize] // bounds check elimination hint
c.key = [8]uint32{
binary.LittleEndian.Uint32(key[0:4]),
binary.LittleEndian.Uint32(key[4:8]),
binary.LittleEndian.Uint32(key[8:12]),
binary.LittleEndian.Uint32(key[12:16]),
binary.LittleEndian.Uint32(key[16:20]),
binary.LittleEndian.Uint32(key[20:24]),
binary.LittleEndian.Uint32(key[24:28]),
binary.LittleEndian.Uint32(key[28:32]),
}
c.nonce = [3]uint32{
binary.LittleEndian.Uint32(nonce[0:4]),
binary.LittleEndian.Uint32(nonce[4:8]),
binary.LittleEndian.Uint32(nonce[8:12]),
}
return c, nil
}
// The constant first 4 words of the ChaCha20 state.
const (
j0 uint32 = 0x61707865 // expa
j1 uint32 = 0x3320646e // nd 3
j2 uint32 = 0x79622d32 // 2-by
j3 uint32 = 0x6b206574 // te k
)
const blockSize = 64
// quarterRound is the core of ChaCha20. It shuffles the bits of 4 state words.
// It's executed 4 times for each of the 20 ChaCha20 rounds, operating on all 16
// words each round, in columnar or diagonal groups of 4 at a time.
func quarterRound(a, b, c, d uint32) (uint32, uint32, uint32, uint32) {
a += b
d ^= a
d = bits.RotateLeft32(d, 16)
c += d
b ^= c
b = bits.RotateLeft32(b, 12)
a += b
d ^= a
d = bits.RotateLeft32(d, 8)
c += d
b ^= c
b = bits.RotateLeft32(b, 7)
return a, b, c, d
}
// SetCounter sets the Cipher counter. The next invocation of XORKeyStream will
// behave as if (64 * counter) bytes had been encrypted so far.
//
// To prevent accidental counter reuse, SetCounter panics if counter is less
// than the current value.
//
// Note that the execution time of XORKeyStream is not independent of the
// counter value.
func (s *Cipher) SetCounter(counter uint32) {
// Internally, s may buffer multiple blocks, which complicates this
// implementation slightly. When checking whether the counter has rolled
// back, we must use both s.counter and s.len to determine how many blocks
// we have already output.
outputCounter := s.counter - uint32(s.len)/blockSize
if s.overflow || counter < outputCounter {
panic("chacha20: SetCounter attempted to rollback counter")
}
// In the general case, we set the new counter value and reset s.len to 0,
// causing the next call to XORKeyStream to refill the buffer. However, if
// we're advancing within the existing buffer, we can save work by simply
// setting s.len.
if counter < s.counter {
s.len = int(s.counter-counter) * blockSize
} else {
s.counter = counter
s.len = 0
}
}
// XORKeyStream XORs each byte in the given slice with a byte from the
// cipher's key stream. Dst and src must overlap entirely or not at all.
//
// If len(dst) < len(src), XORKeyStream will panic. It is acceptable
// to pass a dst bigger than src, and in that case, XORKeyStream will
// only update dst[:len(src)] and will not touch the rest of dst.
//
// Multiple calls to XORKeyStream behave as if the concatenation of
// the src buffers was passed in a single run. That is, Cipher
// maintains state and does not reset at each XORKeyStream call.
func (s *Cipher) XORKeyStream(dst, src []byte) {
if len(src) == 0 {
return
}
if len(dst) < len(src) {
panic("chacha20: output smaller than input")
}
dst = dst[:len(src)]
if subtle.InexactOverlap(dst, src) {
panic("chacha20: invalid buffer overlap")
}
// First, drain any remaining key stream from a previous XORKeyStream.
if s.len != 0 {
keyStream := s.buf[bufSize-s.len:]
if len(src) < len(keyStream) {
keyStream = keyStream[:len(src)]
}
_ = src[len(keyStream)-1] // bounds check elimination hint
for i, b := range keyStream {
dst[i] = src[i] ^ b
}
s.len -= len(keyStream)
dst, src = dst[len(keyStream):], src[len(keyStream):]
}
if len(src) == 0 {
return
}
// If we'd need to let the counter overflow and keep generating output,
// panic immediately. If instead we'd only reach the last block, remember
// not to generate any more output after the buffer is drained.
numBlocks := (uint64(len(src)) + blockSize - 1) / blockSize
if s.overflow || uint64(s.counter)+numBlocks > 1<<32 {
panic("chacha20: counter overflow")
} else if uint64(s.counter)+numBlocks == 1<<32 {
s.overflow = true
}
// xorKeyStreamBlocks implementations expect input lengths that are a
// multiple of bufSize. Platform-specific ones process multiple blocks at a
// time, so have bufSizes that are a multiple of blockSize.
full := len(src) - len(src)%bufSize
if full > 0 {
s.xorKeyStreamBlocks(dst[:full], src[:full])
}
dst, src = dst[full:], src[full:]
// If using a multi-block xorKeyStreamBlocks would overflow, use the generic
// one that does one block at a time.
const blocksPerBuf = bufSize / blockSize
if uint64(s.counter)+blocksPerBuf > 1<<32 {
s.buf = [bufSize]byte{}
numBlocks := (len(src) + blockSize - 1) / blockSize
buf := s.buf[bufSize-numBlocks*blockSize:]
copy(buf, src)
s.xorKeyStreamBlocksGeneric(buf, buf)
s.len = len(buf) - copy(dst, buf)
return
}
// If we have a partial (multi-)block, pad it for xorKeyStreamBlocks, and
// keep the leftover keystream for the next XORKeyStream invocation.
if len(src) > 0 {
s.buf = [bufSize]byte{}
copy(s.buf[:], src)
s.xorKeyStreamBlocks(s.buf[:], s.buf[:])
s.len = bufSize - copy(dst, s.buf[:])
}
}
func (s *Cipher) xorKeyStreamBlocksGeneric(dst, src []byte) {
if len(dst) != len(src) || len(dst)%blockSize != 0 {
panic("chacha20: internal error: wrong dst and/or src length")
}
// To generate each block of key stream, the initial cipher state
// (represented below) is passed through 20 rounds of shuffling,
// alternatively applying quarterRounds by columns (like 1, 5, 9, 13)
// or by diagonals (like 1, 6, 11, 12).
//
// 0:cccccccc 1:cccccccc 2:cccccccc 3:cccccccc
// 4:kkkkkkkk 5:kkkkkkkk 6:kkkkkkkk 7:kkkkkkkk
// 8:kkkkkkkk 9:kkkkkkkk 10:kkkkkkkk 11:kkkkkkkk
// 12:bbbbbbbb 13:nnnnnnnn 14:nnnnnnnn 15:nnnnnnnn
//
// c=constant k=key b=blockcount n=nonce
var (
c0, c1, c2, c3 = j0, j1, j2, j3
c4, c5, c6, c7 = s.key[0], s.key[1], s.key[2], s.key[3]
c8, c9, c10, c11 = s.key[4], s.key[5], s.key[6], s.key[7]
_, c13, c14, c15 = s.counter, s.nonce[0], s.nonce[1], s.nonce[2]
)
// Three quarters of the first round don't depend on the counter, so we can
// calculate them here, and reuse them for multiple blocks in the loop, and
// for future XORKeyStream invocations.
if !s.precompDone {
s.p1, s.p5, s.p9, s.p13 = quarterRound(c1, c5, c9, c13)
s.p2, s.p6, s.p10, s.p14 = quarterRound(c2, c6, c10, c14)
s.p3, s.p7, s.p11, s.p15 = quarterRound(c3, c7, c11, c15)
s.precompDone = true
}
// A condition of len(src) > 0 would be sufficient, but this also
// acts as a bounds check elimination hint.
for len(src) >= 64 && len(dst) >= 64 {
// The remainder of the first column round.
fcr0, fcr4, fcr8, fcr12 := quarterRound(c0, c4, c8, s.counter)
// The second diagonal round.
x0, x5, x10, x15 := quarterRound(fcr0, s.p5, s.p10, s.p15)
x1, x6, x11, x12 := quarterRound(s.p1, s.p6, s.p11, fcr12)
x2, x7, x8, x13 := quarterRound(s.p2, s.p7, fcr8, s.p13)
x3, x4, x9, x14 := quarterRound(s.p3, fcr4, s.p9, s.p14)
// The remaining 18 rounds.
for i := 0; i < 9; i++ {
// Column round.
x0, x4, x8, x12 = quarterRound(x0, x4, x8, x12)
x1, x5, x9, x13 = quarterRound(x1, x5, x9, x13)
x2, x6, x10, x14 = quarterRound(x2, x6, x10, x14)
x3, x7, x11, x15 = quarterRound(x3, x7, x11, x15)
// Diagonal round.
x0, x5, x10, x15 = quarterRound(x0, x5, x10, x15)
x1, x6, x11, x12 = quarterRound(x1, x6, x11, x12)
x2, x7, x8, x13 = quarterRound(x2, x7, x8, x13)
x3, x4, x9, x14 = quarterRound(x3, x4, x9, x14)
}
// Add back the initial state to generate the key stream, then
// XOR the key stream with the source and write out the result.
addXor(dst[0:4], src[0:4], x0, c0)
addXor(dst[4:8], src[4:8], x1, c1)
addXor(dst[8:12], src[8:12], x2, c2)
addXor(dst[12:16], src[12:16], x3, c3)
addXor(dst[16:20], src[16:20], x4, c4)
addXor(dst[20:24], src[20:24], x5, c5)
addXor(dst[24:28], src[24:28], x6, c6)
addXor(dst[28:32], src[28:32], x7, c7)
addXor(dst[32:36], src[32:36], x8, c8)
addXor(dst[36:40], src[36:40], x9, c9)
addXor(dst[40:44], src[40:44], x10, c10)
addXor(dst[44:48], src[44:48], x11, c11)
addXor(dst[48:52], src[48:52], x12, s.counter)
addXor(dst[52:56], src[52:56], x13, c13)
addXor(dst[56:60], src[56:60], x14, c14)
addXor(dst[60:64], src[60:64], x15, c15)
s.counter += 1
src, dst = src[blockSize:], dst[blockSize:]
}
}
// HChaCha20 uses the ChaCha20 core to generate a derived key from a 32 bytes
// key and a 16 bytes nonce. It returns an error if key or nonce have any other
// length. It is used as part of the XChaCha20 construction.
func HChaCha20(key, nonce []byte) ([]byte, error) {
// This function is split into a wrapper so that the slice allocation will
// be inlined, and depending on how the caller uses the return value, won't
// escape to the heap.
out := make([]byte, 32)
return hChaCha20(out, key, nonce)
}
func hChaCha20(out, key, nonce []byte) ([]byte, error) {
if len(key) != KeySize {
return nil, errors.New("chacha20: wrong HChaCha20 key size")
}
if len(nonce) != 16 {
return nil, errors.New("chacha20: wrong HChaCha20 nonce size")
}
x0, x1, x2, x3 := j0, j1, j2, j3
x4 := binary.LittleEndian.Uint32(key[0:4])
x5 := binary.LittleEndian.Uint32(key[4:8])
x6 := binary.LittleEndian.Uint32(key[8:12])
x7 := binary.LittleEndian.Uint32(key[12:16])
x8 := binary.LittleEndian.Uint32(key[16:20])
x9 := binary.LittleEndian.Uint32(key[20:24])
x10 := binary.LittleEndian.Uint32(key[24:28])
x11 := binary.LittleEndian.Uint32(key[28:32])
x12 := binary.LittleEndian.Uint32(nonce[0:4])
x13 := binary.LittleEndian.Uint32(nonce[4:8])
x14 := binary.LittleEndian.Uint32(nonce[8:12])
x15 := binary.LittleEndian.Uint32(nonce[12:16])
for i := 0; i < 10; i++ {
// Diagonal round.
x0, x4, x8, x12 = quarterRound(x0, x4, x8, x12)
x1, x5, x9, x13 = quarterRound(x1, x5, x9, x13)
x2, x6, x10, x14 = quarterRound(x2, x6, x10, x14)
x3, x7, x11, x15 = quarterRound(x3, x7, x11, x15)
// Column round.
x0, x5, x10, x15 = quarterRound(x0, x5, x10, x15)
x1, x6, x11, x12 = quarterRound(x1, x6, x11, x12)
x2, x7, x8, x13 = quarterRound(x2, x7, x8, x13)
x3, x4, x9, x14 = quarterRound(x3, x4, x9, x14)
}
_ = out[31] // bounds check elimination hint
binary.LittleEndian.PutUint32(out[0:4], x0)
binary.LittleEndian.PutUint32(out[4:8], x1)
binary.LittleEndian.PutUint32(out[8:12], x2)
binary.LittleEndian.PutUint32(out[12:16], x3)
binary.LittleEndian.PutUint32(out[16:20], x12)
binary.LittleEndian.PutUint32(out[20:24], x13)
binary.LittleEndian.PutUint32(out[24:28], x14)
binary.LittleEndian.PutUint32(out[28:32], x15)
return out, nil
}

14
vendor/golang.org/x/crypto/chacha20/chacha_noasm.go generated vendored Normal file
View file

@ -0,0 +1,14 @@
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build (!arm64 && !s390x && !ppc64le) || (arm64 && !go1.11) || !gc || purego
// +build !arm64,!s390x,!ppc64le arm64,!go1.11 !gc purego
package chacha20
const bufSize = blockSize
func (s *Cipher) xorKeyStreamBlocks(dst, src []byte) {
s.xorKeyStreamBlocksGeneric(dst, src)
}

17
vendor/golang.org/x/crypto/chacha20/chacha_ppc64le.go generated vendored Normal file
View file

@ -0,0 +1,17 @@
// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build gc && !purego
// +build gc,!purego
package chacha20
const bufSize = 256
//go:noescape
func chaCha20_ctr32_vsx(out, inp *byte, len int, key *[8]uint32, counter *uint32)
func (c *Cipher) xorKeyStreamBlocks(dst, src []byte) {
chaCha20_ctr32_vsx(&dst[0], &src[0], len(src), &c.key, &c.counter)
}

450
vendor/golang.org/x/crypto/chacha20/chacha_ppc64le.s generated vendored Normal file
View file

@ -0,0 +1,450 @@
// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Based on CRYPTOGAMS code with the following comment:
// # ====================================================================
// # Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
// # project. The module is, however, dual licensed under OpenSSL and
// # CRYPTOGAMS licenses depending on where you obtain it. For further
// # details see http://www.openssl.org/~appro/cryptogams/.
// # ====================================================================
// Code for the perl script that generates the ppc64 assembler
// can be found in the cryptogams repository at the link below. It is based on
// the original from openssl.
// https://github.com/dot-asm/cryptogams/commit/a60f5b50ed908e91
// The differences in this and the original implementation are
// due to the calling conventions and initialization of constants.
//go:build gc && !purego
// +build gc,!purego
#include "textflag.h"
#define OUT R3
#define INP R4
#define LEN R5
#define KEY R6
#define CNT R7
#define TMP R15
#define CONSTBASE R16
#define BLOCKS R17
DATA consts<>+0x00(SB)/8, $0x3320646e61707865
DATA consts<>+0x08(SB)/8, $0x6b20657479622d32
DATA consts<>+0x10(SB)/8, $0x0000000000000001
DATA consts<>+0x18(SB)/8, $0x0000000000000000
DATA consts<>+0x20(SB)/8, $0x0000000000000004
DATA consts<>+0x28(SB)/8, $0x0000000000000000
DATA consts<>+0x30(SB)/8, $0x0a0b08090e0f0c0d
DATA consts<>+0x38(SB)/8, $0x0203000106070405
DATA consts<>+0x40(SB)/8, $0x090a0b080d0e0f0c
DATA consts<>+0x48(SB)/8, $0x0102030005060704
DATA consts<>+0x50(SB)/8, $0x6170786561707865
DATA consts<>+0x58(SB)/8, $0x6170786561707865
DATA consts<>+0x60(SB)/8, $0x3320646e3320646e
DATA consts<>+0x68(SB)/8, $0x3320646e3320646e
DATA consts<>+0x70(SB)/8, $0x79622d3279622d32
DATA consts<>+0x78(SB)/8, $0x79622d3279622d32
DATA consts<>+0x80(SB)/8, $0x6b2065746b206574
DATA consts<>+0x88(SB)/8, $0x6b2065746b206574
DATA consts<>+0x90(SB)/8, $0x0000000100000000
DATA consts<>+0x98(SB)/8, $0x0000000300000002
GLOBL consts<>(SB), RODATA, $0xa0
//func chaCha20_ctr32_vsx(out, inp *byte, len int, key *[8]uint32, counter *uint32)
TEXT ·chaCha20_ctr32_vsx(SB),NOSPLIT,$64-40
MOVD out+0(FP), OUT
MOVD inp+8(FP), INP
MOVD len+16(FP), LEN
MOVD key+24(FP), KEY
MOVD counter+32(FP), CNT
// Addressing for constants
MOVD $consts<>+0x00(SB), CONSTBASE
MOVD $16, R8
MOVD $32, R9
MOVD $48, R10
MOVD $64, R11
SRD $6, LEN, BLOCKS
// V16
LXVW4X (CONSTBASE)(R0), VS48
ADD $80,CONSTBASE
// Load key into V17,V18
LXVW4X (KEY)(R0), VS49
LXVW4X (KEY)(R8), VS50
// Load CNT, NONCE into V19
LXVW4X (CNT)(R0), VS51
// Clear V27
VXOR V27, V27, V27
// V28
LXVW4X (CONSTBASE)(R11), VS60
// splat slot from V19 -> V26
VSPLTW $0, V19, V26
VSLDOI $4, V19, V27, V19
VSLDOI $12, V27, V19, V19
VADDUWM V26, V28, V26
MOVD $10, R14
MOVD R14, CTR
loop_outer_vsx:
// V0, V1, V2, V3
LXVW4X (R0)(CONSTBASE), VS32
LXVW4X (R8)(CONSTBASE), VS33
LXVW4X (R9)(CONSTBASE), VS34
LXVW4X (R10)(CONSTBASE), VS35
// splat values from V17, V18 into V4-V11
VSPLTW $0, V17, V4
VSPLTW $1, V17, V5
VSPLTW $2, V17, V6
VSPLTW $3, V17, V7
VSPLTW $0, V18, V8
VSPLTW $1, V18, V9
VSPLTW $2, V18, V10
VSPLTW $3, V18, V11
// VOR
VOR V26, V26, V12
// splat values from V19 -> V13, V14, V15
VSPLTW $1, V19, V13
VSPLTW $2, V19, V14
VSPLTW $3, V19, V15
// splat const values
VSPLTISW $-16, V27
VSPLTISW $12, V28
VSPLTISW $8, V29
VSPLTISW $7, V30
loop_vsx:
VADDUWM V0, V4, V0
VADDUWM V1, V5, V1
VADDUWM V2, V6, V2
VADDUWM V3, V7, V3
VXOR V12, V0, V12
VXOR V13, V1, V13
VXOR V14, V2, V14
VXOR V15, V3, V15
VRLW V12, V27, V12
VRLW V13, V27, V13
VRLW V14, V27, V14
VRLW V15, V27, V15
VADDUWM V8, V12, V8
VADDUWM V9, V13, V9
VADDUWM V10, V14, V10
VADDUWM V11, V15, V11
VXOR V4, V8, V4
VXOR V5, V9, V5
VXOR V6, V10, V6
VXOR V7, V11, V7
VRLW V4, V28, V4
VRLW V5, V28, V5
VRLW V6, V28, V6
VRLW V7, V28, V7
VADDUWM V0, V4, V0
VADDUWM V1, V5, V1
VADDUWM V2, V6, V2
VADDUWM V3, V7, V3
VXOR V12, V0, V12
VXOR V13, V1, V13
VXOR V14, V2, V14
VXOR V15, V3, V15
VRLW V12, V29, V12
VRLW V13, V29, V13
VRLW V14, V29, V14
VRLW V15, V29, V15
VADDUWM V8, V12, V8
VADDUWM V9, V13, V9
VADDUWM V10, V14, V10
VADDUWM V11, V15, V11
VXOR V4, V8, V4
VXOR V5, V9, V5
VXOR V6, V10, V6
VXOR V7, V11, V7
VRLW V4, V30, V4
VRLW V5, V30, V5
VRLW V6, V30, V6
VRLW V7, V30, V7
VADDUWM V0, V5, V0
VADDUWM V1, V6, V1
VADDUWM V2, V7, V2
VADDUWM V3, V4, V3
VXOR V15, V0, V15
VXOR V12, V1, V12
VXOR V13, V2, V13
VXOR V14, V3, V14
VRLW V15, V27, V15
VRLW V12, V27, V12
VRLW V13, V27, V13
VRLW V14, V27, V14
VADDUWM V10, V15, V10
VADDUWM V11, V12, V11
VADDUWM V8, V13, V8
VADDUWM V9, V14, V9
VXOR V5, V10, V5
VXOR V6, V11, V6
VXOR V7, V8, V7
VXOR V4, V9, V4
VRLW V5, V28, V5
VRLW V6, V28, V6
VRLW V7, V28, V7
VRLW V4, V28, V4
VADDUWM V0, V5, V0
VADDUWM V1, V6, V1
VADDUWM V2, V7, V2
VADDUWM V3, V4, V3
VXOR V15, V0, V15
VXOR V12, V1, V12
VXOR V13, V2, V13
VXOR V14, V3, V14
VRLW V15, V29, V15
VRLW V12, V29, V12
VRLW V13, V29, V13
VRLW V14, V29, V14
VADDUWM V10, V15, V10
VADDUWM V11, V12, V11
VADDUWM V8, V13, V8
VADDUWM V9, V14, V9
VXOR V5, V10, V5
VXOR V6, V11, V6
VXOR V7, V8, V7
VXOR V4, V9, V4
VRLW V5, V30, V5
VRLW V6, V30, V6
VRLW V7, V30, V7
VRLW V4, V30, V4
BC 16, LT, loop_vsx
VADDUWM V12, V26, V12
WORD $0x13600F8C // VMRGEW V0, V1, V27
WORD $0x13821F8C // VMRGEW V2, V3, V28
WORD $0x10000E8C // VMRGOW V0, V1, V0
WORD $0x10421E8C // VMRGOW V2, V3, V2
WORD $0x13A42F8C // VMRGEW V4, V5, V29
WORD $0x13C63F8C // VMRGEW V6, V7, V30
XXPERMDI VS32, VS34, $0, VS33
XXPERMDI VS32, VS34, $3, VS35
XXPERMDI VS59, VS60, $0, VS32
XXPERMDI VS59, VS60, $3, VS34
WORD $0x10842E8C // VMRGOW V4, V5, V4
WORD $0x10C63E8C // VMRGOW V6, V7, V6
WORD $0x13684F8C // VMRGEW V8, V9, V27
WORD $0x138A5F8C // VMRGEW V10, V11, V28
XXPERMDI VS36, VS38, $0, VS37
XXPERMDI VS36, VS38, $3, VS39
XXPERMDI VS61, VS62, $0, VS36
XXPERMDI VS61, VS62, $3, VS38
WORD $0x11084E8C // VMRGOW V8, V9, V8
WORD $0x114A5E8C // VMRGOW V10, V11, V10
WORD $0x13AC6F8C // VMRGEW V12, V13, V29
WORD $0x13CE7F8C // VMRGEW V14, V15, V30
XXPERMDI VS40, VS42, $0, VS41
XXPERMDI VS40, VS42, $3, VS43
XXPERMDI VS59, VS60, $0, VS40
XXPERMDI VS59, VS60, $3, VS42
WORD $0x118C6E8C // VMRGOW V12, V13, V12
WORD $0x11CE7E8C // VMRGOW V14, V15, V14
VSPLTISW $4, V27
VADDUWM V26, V27, V26
XXPERMDI VS44, VS46, $0, VS45
XXPERMDI VS44, VS46, $3, VS47
XXPERMDI VS61, VS62, $0, VS44
XXPERMDI VS61, VS62, $3, VS46
VADDUWM V0, V16, V0
VADDUWM V4, V17, V4
VADDUWM V8, V18, V8
VADDUWM V12, V19, V12
CMPU LEN, $64
BLT tail_vsx
// Bottom of loop
LXVW4X (INP)(R0), VS59
LXVW4X (INP)(R8), VS60
LXVW4X (INP)(R9), VS61
LXVW4X (INP)(R10), VS62
VXOR V27, V0, V27
VXOR V28, V4, V28
VXOR V29, V8, V29
VXOR V30, V12, V30
STXVW4X VS59, (OUT)(R0)
STXVW4X VS60, (OUT)(R8)
ADD $64, INP
STXVW4X VS61, (OUT)(R9)
ADD $-64, LEN
STXVW4X VS62, (OUT)(R10)
ADD $64, OUT
BEQ done_vsx
VADDUWM V1, V16, V0
VADDUWM V5, V17, V4
VADDUWM V9, V18, V8
VADDUWM V13, V19, V12
CMPU LEN, $64
BLT tail_vsx
LXVW4X (INP)(R0), VS59
LXVW4X (INP)(R8), VS60
LXVW4X (INP)(R9), VS61
LXVW4X (INP)(R10), VS62
VXOR V27, V0, V27
VXOR V28, V4, V28
VXOR V29, V8, V29
VXOR V30, V12, V30
STXVW4X VS59, (OUT)(R0)
STXVW4X VS60, (OUT)(R8)
ADD $64, INP
STXVW4X VS61, (OUT)(R9)
ADD $-64, LEN
STXVW4X VS62, (OUT)(V10)
ADD $64, OUT
BEQ done_vsx
VADDUWM V2, V16, V0
VADDUWM V6, V17, V4
VADDUWM V10, V18, V8
VADDUWM V14, V19, V12
CMPU LEN, $64
BLT tail_vsx
LXVW4X (INP)(R0), VS59
LXVW4X (INP)(R8), VS60
LXVW4X (INP)(R9), VS61
LXVW4X (INP)(R10), VS62
VXOR V27, V0, V27
VXOR V28, V4, V28
VXOR V29, V8, V29
VXOR V30, V12, V30
STXVW4X VS59, (OUT)(R0)
STXVW4X VS60, (OUT)(R8)
ADD $64, INP
STXVW4X VS61, (OUT)(R9)
ADD $-64, LEN
STXVW4X VS62, (OUT)(R10)
ADD $64, OUT
BEQ done_vsx
VADDUWM V3, V16, V0
VADDUWM V7, V17, V4
VADDUWM V11, V18, V8
VADDUWM V15, V19, V12
CMPU LEN, $64
BLT tail_vsx
LXVW4X (INP)(R0), VS59
LXVW4X (INP)(R8), VS60
LXVW4X (INP)(R9), VS61
LXVW4X (INP)(R10), VS62
VXOR V27, V0, V27
VXOR V28, V4, V28
VXOR V29, V8, V29
VXOR V30, V12, V30
STXVW4X VS59, (OUT)(R0)
STXVW4X VS60, (OUT)(R8)
ADD $64, INP
STXVW4X VS61, (OUT)(R9)
ADD $-64, LEN
STXVW4X VS62, (OUT)(R10)
ADD $64, OUT
MOVD $10, R14
MOVD R14, CTR
BNE loop_outer_vsx
done_vsx:
// Increment counter by number of 64 byte blocks
MOVD (CNT), R14
ADD BLOCKS, R14
MOVD R14, (CNT)
RET
tail_vsx:
ADD $32, R1, R11
MOVD LEN, CTR
// Save values on stack to copy from
STXVW4X VS32, (R11)(R0)
STXVW4X VS36, (R11)(R8)
STXVW4X VS40, (R11)(R9)
STXVW4X VS44, (R11)(R10)
ADD $-1, R11, R12
ADD $-1, INP
ADD $-1, OUT
looptail_vsx:
// Copying the result to OUT
// in bytes.
MOVBZU 1(R12), KEY
MOVBZU 1(INP), TMP
XOR KEY, TMP, KEY
MOVBU KEY, 1(OUT)
BC 16, LT, looptail_vsx
// Clear the stack values
STXVW4X VS48, (R11)(R0)
STXVW4X VS48, (R11)(R8)
STXVW4X VS48, (R11)(R9)
STXVW4X VS48, (R11)(R10)
BR done_vsx

27
vendor/golang.org/x/crypto/chacha20/chacha_s390x.go generated vendored Normal file
View file

@ -0,0 +1,27 @@
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build gc && !purego
// +build gc,!purego
package chacha20
import "golang.org/x/sys/cpu"
var haveAsm = cpu.S390X.HasVX
const bufSize = 256
// xorKeyStreamVX is an assembly implementation of XORKeyStream. It must only
// be called when the vector facility is available. Implementation in asm_s390x.s.
//go:noescape
func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32)
func (c *Cipher) xorKeyStreamBlocks(dst, src []byte) {
if cpu.S390X.HasVX {
xorKeyStreamVX(dst, src, &c.key, &c.nonce, &c.counter)
} else {
c.xorKeyStreamBlocksGeneric(dst, src)
}
}

225
vendor/golang.org/x/crypto/chacha20/chacha_s390x.s generated vendored Normal file
View file

@ -0,0 +1,225 @@
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build gc && !purego
// +build gc,!purego
#include "go_asm.h"
#include "textflag.h"
// This is an implementation of the ChaCha20 encryption algorithm as
// specified in RFC 7539. It uses vector instructions to compute
// 4 keystream blocks in parallel (256 bytes) which are then XORed
// with the bytes in the input slice.
GLOBL ·constants<>(SB), RODATA|NOPTR, $32
// BSWAP: swap bytes in each 4-byte element
DATA ·constants<>+0x00(SB)/4, $0x03020100
DATA ·constants<>+0x04(SB)/4, $0x07060504
DATA ·constants<>+0x08(SB)/4, $0x0b0a0908
DATA ·constants<>+0x0c(SB)/4, $0x0f0e0d0c
// J0: [j0, j1, j2, j3]
DATA ·constants<>+0x10(SB)/4, $0x61707865
DATA ·constants<>+0x14(SB)/4, $0x3320646e
DATA ·constants<>+0x18(SB)/4, $0x79622d32
DATA ·constants<>+0x1c(SB)/4, $0x6b206574
#define BSWAP V5
#define J0 V6
#define KEY0 V7
#define KEY1 V8
#define NONCE V9
#define CTR V10
#define M0 V11
#define M1 V12
#define M2 V13
#define M3 V14
#define INC V15
#define X0 V16
#define X1 V17
#define X2 V18
#define X3 V19
#define X4 V20
#define X5 V21
#define X6 V22
#define X7 V23
#define X8 V24
#define X9 V25
#define X10 V26
#define X11 V27
#define X12 V28
#define X13 V29
#define X14 V30
#define X15 V31
#define NUM_ROUNDS 20
#define ROUND4(a0, a1, a2, a3, b0, b1, b2, b3, c0, c1, c2, c3, d0, d1, d2, d3) \
VAF a1, a0, a0 \
VAF b1, b0, b0 \
VAF c1, c0, c0 \
VAF d1, d0, d0 \
VX a0, a2, a2 \
VX b0, b2, b2 \
VX c0, c2, c2 \
VX d0, d2, d2 \
VERLLF $16, a2, a2 \
VERLLF $16, b2, b2 \
VERLLF $16, c2, c2 \
VERLLF $16, d2, d2 \
VAF a2, a3, a3 \
VAF b2, b3, b3 \
VAF c2, c3, c3 \
VAF d2, d3, d3 \
VX a3, a1, a1 \
VX b3, b1, b1 \
VX c3, c1, c1 \
VX d3, d1, d1 \
VERLLF $12, a1, a1 \
VERLLF $12, b1, b1 \
VERLLF $12, c1, c1 \
VERLLF $12, d1, d1 \
VAF a1, a0, a0 \
VAF b1, b0, b0 \
VAF c1, c0, c0 \
VAF d1, d0, d0 \
VX a0, a2, a2 \
VX b0, b2, b2 \
VX c0, c2, c2 \
VX d0, d2, d2 \
VERLLF $8, a2, a2 \
VERLLF $8, b2, b2 \
VERLLF $8, c2, c2 \
VERLLF $8, d2, d2 \
VAF a2, a3, a3 \
VAF b2, b3, b3 \
VAF c2, c3, c3 \
VAF d2, d3, d3 \
VX a3, a1, a1 \
VX b3, b1, b1 \
VX c3, c1, c1 \
VX d3, d1, d1 \
VERLLF $7, a1, a1 \
VERLLF $7, b1, b1 \
VERLLF $7, c1, c1 \
VERLLF $7, d1, d1
#define PERMUTE(mask, v0, v1, v2, v3) \
VPERM v0, v0, mask, v0 \
VPERM v1, v1, mask, v1 \
VPERM v2, v2, mask, v2 \
VPERM v3, v3, mask, v3
#define ADDV(x, v0, v1, v2, v3) \
VAF x, v0, v0 \
VAF x, v1, v1 \
VAF x, v2, v2 \
VAF x, v3, v3
#define XORV(off, dst, src, v0, v1, v2, v3) \
VLM off(src), M0, M3 \
PERMUTE(BSWAP, v0, v1, v2, v3) \
VX v0, M0, M0 \
VX v1, M1, M1 \
VX v2, M2, M2 \
VX v3, M3, M3 \
VSTM M0, M3, off(dst)
#define SHUFFLE(a, b, c, d, t, u, v, w) \
VMRHF a, c, t \ // t = {a[0], c[0], a[1], c[1]}
VMRHF b, d, u \ // u = {b[0], d[0], b[1], d[1]}
VMRLF a, c, v \ // v = {a[2], c[2], a[3], c[3]}
VMRLF b, d, w \ // w = {b[2], d[2], b[3], d[3]}
VMRHF t, u, a \ // a = {a[0], b[0], c[0], d[0]}
VMRLF t, u, b \ // b = {a[1], b[1], c[1], d[1]}
VMRHF v, w, c \ // c = {a[2], b[2], c[2], d[2]}
VMRLF v, w, d // d = {a[3], b[3], c[3], d[3]}
// func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32)
TEXT ·xorKeyStreamVX(SB), NOSPLIT, $0
MOVD $·constants<>(SB), R1
MOVD dst+0(FP), R2 // R2=&dst[0]
LMG src+24(FP), R3, R4 // R3=&src[0] R4=len(src)
MOVD key+48(FP), R5 // R5=key
MOVD nonce+56(FP), R6 // R6=nonce
MOVD counter+64(FP), R7 // R7=counter
// load BSWAP and J0
VLM (R1), BSWAP, J0
// setup
MOVD $95, R0
VLM (R5), KEY0, KEY1
VLL R0, (R6), NONCE
VZERO M0
VLEIB $7, $32, M0
VSRLB M0, NONCE, NONCE
// initialize counter values
VLREPF (R7), CTR
VZERO INC
VLEIF $1, $1, INC
VLEIF $2, $2, INC
VLEIF $3, $3, INC
VAF INC, CTR, CTR
VREPIF $4, INC
chacha:
VREPF $0, J0, X0
VREPF $1, J0, X1
VREPF $2, J0, X2
VREPF $3, J0, X3
VREPF $0, KEY0, X4
VREPF $1, KEY0, X5
VREPF $2, KEY0, X6
VREPF $3, KEY0, X7
VREPF $0, KEY1, X8
VREPF $1, KEY1, X9
VREPF $2, KEY1, X10
VREPF $3, KEY1, X11
VLR CTR, X12
VREPF $1, NONCE, X13
VREPF $2, NONCE, X14
VREPF $3, NONCE, X15
MOVD $(NUM_ROUNDS/2), R1
loop:
ROUND4(X0, X4, X12, X8, X1, X5, X13, X9, X2, X6, X14, X10, X3, X7, X15, X11)
ROUND4(X0, X5, X15, X10, X1, X6, X12, X11, X2, X7, X13, X8, X3, X4, X14, X9)
ADD $-1, R1
BNE loop
// decrement length
ADD $-256, R4
// rearrange vectors
SHUFFLE(X0, X1, X2, X3, M0, M1, M2, M3)
ADDV(J0, X0, X1, X2, X3)
SHUFFLE(X4, X5, X6, X7, M0, M1, M2, M3)
ADDV(KEY0, X4, X5, X6, X7)
SHUFFLE(X8, X9, X10, X11, M0, M1, M2, M3)
ADDV(KEY1, X8, X9, X10, X11)
VAF CTR, X12, X12
SHUFFLE(X12, X13, X14, X15, M0, M1, M2, M3)
ADDV(NONCE, X12, X13, X14, X15)
// increment counters
VAF INC, CTR, CTR
// xor keystream with plaintext
XORV(0*64, R2, R3, X0, X4, X8, X12)
XORV(1*64, R2, R3, X1, X5, X9, X13)
XORV(2*64, R2, R3, X2, X6, X10, X14)
XORV(3*64, R2, R3, X3, X7, X11, X15)
// increment pointers
MOVD $256(R2), R2
MOVD $256(R3), R3
CMPBNE R4, $0, chacha
VSTEF $0, CTR, (R7)
RET

42
vendor/golang.org/x/crypto/chacha20/xor.go generated vendored Normal file
View file

@ -0,0 +1,42 @@
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found src the LICENSE file.
package chacha20
import "runtime"
// Platforms that have fast unaligned 32-bit little endian accesses.
const unaligned = runtime.GOARCH == "386" ||
runtime.GOARCH == "amd64" ||
runtime.GOARCH == "arm64" ||
runtime.GOARCH == "ppc64le" ||
runtime.GOARCH == "s390x"
// addXor reads a little endian uint32 from src, XORs it with (a + b) and
// places the result in little endian byte order in dst.
func addXor(dst, src []byte, a, b uint32) {
_, _ = src[3], dst[3] // bounds check elimination hint
if unaligned {
// The compiler should optimize this code into
// 32-bit unaligned little endian loads and stores.
// TODO: delete once the compiler does a reliably
// good job with the generic code below.
// See issue #25111 for more details.
v := uint32(src[0])
v |= uint32(src[1]) << 8
v |= uint32(src[2]) << 16
v |= uint32(src[3]) << 24
v ^= a + b
dst[0] = byte(v)
dst[1] = byte(v >> 8)
dst[2] = byte(v >> 16)
dst[3] = byte(v >> 24)
} else {
a += b
dst[0] = src[0] ^ byte(a)
dst[1] = src[1] ^ byte(a>>8)
dst[2] = src[2] ^ byte(a>>16)
dst[3] = src[3] ^ byte(a>>24)
}
}

145
vendor/golang.org/x/crypto/curve25519/curve25519.go generated vendored Normal file
View file

@ -0,0 +1,145 @@
// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package curve25519 provides an implementation of the X25519 function, which
// performs scalar multiplication on the elliptic curve known as Curve25519.
// See RFC 7748.
package curve25519 // import "golang.org/x/crypto/curve25519"
import (
"crypto/subtle"
"fmt"
"golang.org/x/crypto/curve25519/internal/field"
)
// ScalarMult sets dst to the product scalar * point.
//
// Deprecated: when provided a low-order point, ScalarMult will set dst to all
// zeroes, irrespective of the scalar. Instead, use the X25519 function, which
// will return an error.
func ScalarMult(dst, scalar, point *[32]byte) {
var e [32]byte
copy(e[:], scalar[:])
e[0] &= 248
e[31] &= 127
e[31] |= 64
var x1, x2, z2, x3, z3, tmp0, tmp1 field.Element
x1.SetBytes(point[:])
x2.One()
x3.Set(&x1)
z3.One()
swap := 0
for pos := 254; pos >= 0; pos-- {
b := e[pos/8] >> uint(pos&7)
b &= 1
swap ^= int(b)
x2.Swap(&x3, swap)
z2.Swap(&z3, swap)
swap = int(b)
tmp0.Subtract(&x3, &z3)
tmp1.Subtract(&x2, &z2)
x2.Add(&x2, &z2)
z2.Add(&x3, &z3)
z3.Multiply(&tmp0, &x2)
z2.Multiply(&z2, &tmp1)
tmp0.Square(&tmp1)
tmp1.Square(&x2)
x3.Add(&z3, &z2)
z2.Subtract(&z3, &z2)
x2.Multiply(&tmp1, &tmp0)
tmp1.Subtract(&tmp1, &tmp0)
z2.Square(&z2)
z3.Mult32(&tmp1, 121666)
x3.Square(&x3)
tmp0.Add(&tmp0, &z3)
z3.Multiply(&x1, &z2)
z2.Multiply(&tmp1, &tmp0)
}
x2.Swap(&x3, swap)
z2.Swap(&z3, swap)
z2.Invert(&z2)
x2.Multiply(&x2, &z2)
copy(dst[:], x2.Bytes())
}
// ScalarBaseMult sets dst to the product scalar * base where base is the
// standard generator.
//
// It is recommended to use the X25519 function with Basepoint instead, as
// copying into fixed size arrays can lead to unexpected bugs.
func ScalarBaseMult(dst, scalar *[32]byte) {
ScalarMult(dst, scalar, &basePoint)
}
const (
// ScalarSize is the size of the scalar input to X25519.
ScalarSize = 32
// PointSize is the size of the point input to X25519.
PointSize = 32
)
// Basepoint is the canonical Curve25519 generator.
var Basepoint []byte
var basePoint = [32]byte{9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
func init() { Basepoint = basePoint[:] }
func checkBasepoint() {
if subtle.ConstantTimeCompare(Basepoint, []byte{
0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
}) != 1 {
panic("curve25519: global Basepoint value was modified")
}
}
// X25519 returns the result of the scalar multiplication (scalar * point),
// according to RFC 7748, Section 5. scalar, point and the return value are
// slices of 32 bytes.
//
// scalar can be generated at random, for example with crypto/rand. point should
// be either Basepoint or the output of another X25519 call.
//
// If point is Basepoint (but not if it's a different slice with the same
// contents) a precomputed implementation might be used for performance.
func X25519(scalar, point []byte) ([]byte, error) {
// Outline the body of function, to let the allocation be inlined in the
// caller, and possibly avoid escaping to the heap.
var dst [32]byte
return x25519(&dst, scalar, point)
}
func x25519(dst *[32]byte, scalar, point []byte) ([]byte, error) {
var in [32]byte
if l := len(scalar); l != 32 {
return nil, fmt.Errorf("bad scalar length: %d, expected %d", l, 32)
}
if l := len(point); l != 32 {
return nil, fmt.Errorf("bad point length: %d, expected %d", l, 32)
}
copy(in[:], scalar)
if &point[0] == &Basepoint[0] {
checkBasepoint()
ScalarBaseMult(dst, &in)
} else {
var base, zero [32]byte
copy(base[:], point)
ScalarMult(dst, &in, &base)
if subtle.ConstantTimeCompare(dst[:], zero[:]) == 1 {
return nil, fmt.Errorf("bad input point: low order point")
}
}
return dst[:], nil
}

7
vendor/golang.org/x/crypto/curve25519/internal/field/README generated vendored Normal file
View file

@ -0,0 +1,7 @@
This package is kept in sync with crypto/ed25519/internal/edwards25519/field in
the standard library.
If there are any changes in the standard library that need to be synced to this
package, run sync.sh. It will not overwrite any local changes made since the
previous sync, so it's ok to land changes in this package first, and then sync
to the standard library later.

416
vendor/golang.org/x/crypto/curve25519/internal/field/fe.go generated vendored Normal file
View file

@ -0,0 +1,416 @@
// Copyright (c) 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package field implements fast arithmetic modulo 2^255-19.
package field
import (
"crypto/subtle"
"encoding/binary"
"math/bits"
)
// Element represents an element of the field GF(2^255-19). Note that this
// is not a cryptographically secure group, and should only be used to interact
// with edwards25519.Point coordinates.
//
// This type works similarly to math/big.Int, and all arguments and receivers
// are allowed to alias.
//
// The zero value is a valid zero element.
type Element struct {
// An element t represents the integer
// t.l0 + t.l1*2^51 + t.l2*2^102 + t.l3*2^153 + t.l4*2^204
//
// Between operations, all limbs are expected to be lower than 2^52.
l0 uint64
l1 uint64
l2 uint64
l3 uint64
l4 uint64
}
const maskLow51Bits uint64 = (1 << 51) - 1
var feZero = &Element{0, 0, 0, 0, 0}
// Zero sets v = 0, and returns v.
func (v *Element) Zero() *Element {
*v = *feZero
return v
}
var feOne = &Element{1, 0, 0, 0, 0}
// One sets v = 1, and returns v.
func (v *Element) One() *Element {
*v = *feOne
return v
}
// reduce reduces v modulo 2^255 - 19 and returns it.
func (v *Element) reduce() *Element {
v.carryPropagate()
// After the light reduction we now have a field element representation
// v < 2^255 + 2^13 * 19, but need v < 2^255 - 19.
// If v >= 2^255 - 19, then v + 19 >= 2^255, which would overflow 2^255 - 1,
// generating a carry. That is, c will be 0 if v < 2^255 - 19, and 1 otherwise.
c := (v.l0 + 19) >> 51
c = (v.l1 + c) >> 51
c = (v.l2 + c) >> 51
c = (v.l3 + c) >> 51
c = (v.l4 + c) >> 51
// If v < 2^255 - 19 and c = 0, this will be a no-op. Otherwise, it's
// effectively applying the reduction identity to the carry.
v.l0 += 19 * c
v.l1 += v.l0 >> 51
v.l0 = v.l0 & maskLow51Bits
v.l2 += v.l1 >> 51
v.l1 = v.l1 & maskLow51Bits
v.l3 += v.l2 >> 51
v.l2 = v.l2 & maskLow51Bits
v.l4 += v.l3 >> 51
v.l3 = v.l3 & maskLow51Bits
// no additional carry
v.l4 = v.l4 & maskLow51Bits
return v
}
// Add sets v = a + b, and returns v.
func (v *Element) Add(a, b *Element) *Element {
v.l0 = a.l0 + b.l0
v.l1 = a.l1 + b.l1
v.l2 = a.l2 + b.l2
v.l3 = a.l3 + b.l3
v.l4 = a.l4 + b.l4
// Using the generic implementation here is actually faster than the
// assembly. Probably because the body of this function is so simple that
// the compiler can figure out better optimizations by inlining the carry
// propagation. TODO
return v.carryPropagateGeneric()
}
// Subtract sets v = a - b, and returns v.
func (v *Element) Subtract(a, b *Element) *Element {
// We first add 2 * p, to guarantee the subtraction won't underflow, and
// then subtract b (which can be up to 2^255 + 2^13 * 19).
v.l0 = (a.l0 + 0xFFFFFFFFFFFDA) - b.l0
v.l1 = (a.l1 + 0xFFFFFFFFFFFFE) - b.l1
v.l2 = (a.l2 + 0xFFFFFFFFFFFFE) - b.l2
v.l3 = (a.l3 + 0xFFFFFFFFFFFFE) - b.l3
v.l4 = (a.l4 + 0xFFFFFFFFFFFFE) - b.l4
return v.carryPropagate()
}
// Negate sets v = -a, and returns v.
func (v *Element) Negate(a *Element) *Element {
return v.Subtract(feZero, a)
}
// Invert sets v = 1/z mod p, and returns v.
//
// If z == 0, Invert returns v = 0.
func (v *Element) Invert(z *Element) *Element {
// Inversion is implemented as exponentiation with exponent p − 2. It uses the
// same sequence of 255 squarings and 11 multiplications as [Curve25519].
var z2, z9, z11, z2_5_0, z2_10_0, z2_20_0, z2_50_0, z2_100_0, t Element
z2.Square(z) // 2
t.Square(&z2) // 4
t.Square(&t) // 8
z9.Multiply(&t, z) // 9
z11.Multiply(&z9, &z2) // 11
t.Square(&z11) // 22
z2_5_0.Multiply(&t, &z9) // 31 = 2^5 - 2^0
t.Square(&z2_5_0) // 2^6 - 2^1
for i := 0; i < 4; i++ {
t.Square(&t) // 2^10 - 2^5
}
z2_10_0.Multiply(&t, &z2_5_0) // 2^10 - 2^0
t.Square(&z2_10_0) // 2^11 - 2^1
for i := 0; i < 9; i++ {
t.Square(&t) // 2^20 - 2^10
}
z2_20_0.Multiply(&t, &z2_10_0) // 2^20 - 2^0
t.Square(&z2_20_0) // 2^21 - 2^1
for i := 0; i < 19; i++ {
t.Square(&t) // 2^40 - 2^20
}
t.Multiply(&t, &z2_20_0) // 2^40 - 2^0
t.Square(&t) // 2^41 - 2^1
for i := 0; i < 9; i++ {
t.Square(&t) // 2^50 - 2^10
}
z2_50_0.Multiply(&t, &z2_10_0) // 2^50 - 2^0
t.Square(&z2_50_0) // 2^51 - 2^1
for i := 0; i < 49; i++ {
t.Square(&t) // 2^100 - 2^50
}
z2_100_0.Multiply(&t, &z2_50_0) // 2^100 - 2^0
t.Square(&z2_100_0) // 2^101 - 2^1
for i := 0; i < 99; i++ {
t.Square(&t) // 2^200 - 2^100
}
t.Multiply(&t, &z2_100_0) // 2^200 - 2^0
t.Square(&t) // 2^201 - 2^1
for i := 0; i < 49; i++ {
t.Square(&t) // 2^250 - 2^50
}
t.Multiply(&t, &z2_50_0) // 2^250 - 2^0
t.Square(&t) // 2^251 - 2^1
t.Square(&t) // 2^252 - 2^2
t.Square(&t) // 2^253 - 2^3
t.Square(&t) // 2^254 - 2^4
t.Square(&t) // 2^255 - 2^5
return v.Multiply(&t, &z11) // 2^255 - 21
}
// Set sets v = a, and returns v.
func (v *Element) Set(a *Element) *Element {
*v = *a
return v
}
// SetBytes sets v to x, which must be a 32-byte little-endian encoding.
//
// Consistent with RFC 7748, the most significant bit (the high bit of the
// last byte) is ignored, and non-canonical values (2^255-19 through 2^255-1)
// are accepted. Note that this is laxer than specified by RFC 8032.
func (v *Element) SetBytes(x []byte) *Element {
if len(x) != 32 {
panic("edwards25519: invalid field element input size")
}
// Bits 0:51 (bytes 0:8, bits 0:64, shift 0, mask 51).
v.l0 = binary.LittleEndian.Uint64(x[0:8])
v.l0 &= maskLow51Bits
// Bits 51:102 (bytes 6:14, bits 48:112, shift 3, mask 51).
v.l1 = binary.LittleEndian.Uint64(x[6:14]) >> 3
v.l1 &= maskLow51Bits
// Bits 102:153 (bytes 12:20, bits 96:160, shift 6, mask 51).
v.l2 = binary.LittleEndian.Uint64(x[12:20]) >> 6
v.l2 &= maskLow51Bits
// Bits 153:204 (bytes 19:27, bits 152:216, shift 1, mask 51).
v.l3 = binary.LittleEndian.Uint64(x[19:27]) >> 1
v.l3 &= maskLow51Bits
// Bits 204:251 (bytes 24:32, bits 192:256, shift 12, mask 51).
// Note: not bytes 25:33, shift 4, to avoid overread.
v.l4 = binary.LittleEndian.Uint64(x[24:32]) >> 12
v.l4 &= maskLow51Bits
return v
}
// Bytes returns the canonical 32-byte little-endian encoding of v.
func (v *Element) Bytes() []byte {
// This function is outlined to make the allocations inline in the caller
// rather than happen on the heap.
var out [32]byte
return v.bytes(&out)
}
func (v *Element) bytes(out *[32]byte) []byte {
t := *v
t.reduce()
var buf [8]byte
for i, l := range [5]uint64{t.l0, t.l1, t.l2, t.l3, t.l4} {
bitsOffset := i * 51
binary.LittleEndian.PutUint64(buf[:], l<<uint(bitsOffset%8))
for i, bb := range buf {
off := bitsOffset/8 + i
if off >= len(out) {
break
}
out[off] |= bb
}
}
return out[:]
}
// Equal returns 1 if v and u are equal, and 0 otherwise.
func (v *Element) Equal(u *Element) int {
sa, sv := u.Bytes(), v.Bytes()
return subtle.ConstantTimeCompare(sa, sv)
}
// mask64Bits returns 0xffffffff if cond is 1, and 0 otherwise.
func mask64Bits(cond int) uint64 { return ^(uint64(cond) - 1) }
// Select sets v to a if cond == 1, and to b if cond == 0.
func (v *Element) Select(a, b *Element, cond int) *Element {
m := mask64Bits(cond)
v.l0 = (m & a.l0) | (^m & b.l0)
v.l1 = (m & a.l1) | (^m & b.l1)
v.l2 = (m & a.l2) | (^m & b.l2)
v.l3 = (m & a.l3) | (^m & b.l3)
v.l4 = (m & a.l4) | (^m & b.l4)
return v
}
// Swap swaps v and u if cond == 1 or leaves them unchanged if cond == 0, and returns v.
func (v *Element) Swap(u *Element, cond int) {
m := mask64Bits(cond)
t := m & (v.l0 ^ u.l0)
v.l0 ^= t
u.l0 ^= t
t = m & (v.l1 ^ u.l1)
v.l1 ^= t
u.l1 ^= t
t = m & (v.l2 ^ u.l2)
v.l2 ^= t
u.l2 ^= t
t = m & (v.l3 ^ u.l3)
v.l3 ^= t
u.l3 ^= t
t = m & (v.l4 ^ u.l4)
v.l4 ^= t
u.l4 ^= t
}
// IsNegative returns 1 if v is negative, and 0 otherwise.
func (v *Element) IsNegative() int {
return int(v.Bytes()[0] & 1)
}
// Absolute sets v to |u|, and returns v.
func (v *Element) Absolute(u *Element) *Element {
return v.Select(new(Element).Negate(u), u, u.IsNegative())
}
// Multiply sets v = x * y, and returns v.
func (v *Element) Multiply(x, y *Element) *Element {
feMul(v, x, y)
return v
}
// Square sets v = x * x, and returns v.
func (v *Element) Square(x *Element) *Element {
feSquare(v, x)
return v
}
// Mult32 sets v = x * y, and returns v.
func (v *Element) Mult32(x *Element, y uint32) *Element {
x0lo, x0hi := mul51(x.l0, y)
x1lo, x1hi := mul51(x.l1, y)
x2lo, x2hi := mul51(x.l2, y)
x3lo, x3hi := mul51(x.l3, y)
x4lo, x4hi := mul51(x.l4, y)
v.l0 = x0lo + 19*x4hi // carried over per the reduction identity
v.l1 = x1lo + x0hi
v.l2 = x2lo + x1hi
v.l3 = x3lo + x2hi
v.l4 = x4lo + x3hi
// The hi portions are going to be only 32 bits, plus any previous excess,
// so we can skip the carry propagation.
return v
}
// mul51 returns lo + hi * 2⁵¹ = a * b.
func mul51(a uint64, b uint32) (lo uint64, hi uint64) {
mh, ml := bits.Mul64(a, uint64(b))
lo = ml & maskLow51Bits
hi = (mh << 13) | (ml >> 51)
return
}
// Pow22523 set v = x^((p-5)/8), and returns v. (p-5)/8 is 2^252-3.
func (v *Element) Pow22523(x *Element) *Element {
var t0, t1, t2 Element
t0.Square(x) // x^2
t1.Square(&t0) // x^4
t1.Square(&t1) // x^8
t1.Multiply(x, &t1) // x^9
t0.Multiply(&t0, &t1) // x^11
t0.Square(&t0) // x^22
t0.Multiply(&t1, &t0) // x^31
t1.Square(&t0) // x^62
for i := 1; i < 5; i++ { // x^992
t1.Square(&t1)
}
t0.Multiply(&t1, &t0) // x^1023 -> 1023 = 2^10 - 1
t1.Square(&t0) // 2^11 - 2
for i := 1; i < 10; i++ { // 2^20 - 2^10
t1.Square(&t1)
}
t1.Multiply(&t1, &t0) // 2^20 - 1
t2.Square(&t1) // 2^21 - 2
for i := 1; i < 20; i++ { // 2^40 - 2^20
t2.Square(&t2)
}
t1.Multiply(&t2, &t1) // 2^40 - 1
t1.Square(&t1) // 2^41 - 2
for i := 1; i < 10; i++ { // 2^50 - 2^10
t1.Square(&t1)
}
t0.Multiply(&t1, &t0) // 2^50 - 1
t1.Square(&t0) // 2^51 - 2
for i := 1; i < 50; i++ { // 2^100 - 2^50
t1.Square(&t1)
}
t1.Multiply(&t1, &t0) // 2^100 - 1
t2.Square(&t1) // 2^101 - 2
for i := 1; i < 100; i++ { // 2^200 - 2^100
t2.Square(&t2)
}
t1.Multiply(&t2, &t1) // 2^200 - 1
t1.Square(&t1) // 2^201 - 2
for i := 1; i < 50; i++ { // 2^250 - 2^50
t1.Square(&t1)
}
t0.Multiply(&t1, &t0) // 2^250 - 1
t0.Square(&t0) // 2^251 - 2
t0.Square(&t0) // 2^252 - 4
return v.Multiply(&t0, x) // 2^252 - 3 -> x^(2^252-3)
}
// sqrtM1 is 2^((p-1)/4), which squared is equal to -1 by Euler's Criterion.
var sqrtM1 = &Element{1718705420411056, 234908883556509,
2233514472574048, 2117202627021982, 765476049583133}
// SqrtRatio sets r to the non-negative square root of the ratio of u and v.
//
// If u/v is square, SqrtRatio returns r and 1. If u/v is not square, SqrtRatio
// sets r according to Section 4.3 of draft-irtf-cfrg-ristretto255-decaf448-00,
// and returns r and 0.
func (r *Element) SqrtRatio(u, v *Element) (rr *Element, wasSquare int) {
var a, b Element
// r = (u * v3) * (u * v7)^((p-5)/8)
v2 := a.Square(v)
uv3 := b.Multiply(u, b.Multiply(v2, v))
uv7 := a.Multiply(uv3, a.Square(v2))
r.Multiply(uv3, r.Pow22523(uv7))
check := a.Multiply(v, a.Square(r)) // check = v * r^2
uNeg := b.Negate(u)
correctSignSqrt := check.Equal(u)
flippedSignSqrt := check.Equal(uNeg)
flippedSignSqrtI := check.Equal(uNeg.Multiply(uNeg, sqrtM1))
rPrime := b.Multiply(r, sqrtM1) // r_prime = SQRT_M1 * r
// r = CT_SELECT(r_prime IF flipped_sign_sqrt | flipped_sign_sqrt_i ELSE r)
r.Select(rPrime, r, flippedSignSqrt|flippedSignSqrtI)
r.Absolute(r) // Choose the nonnegative square root.
return r, correctSignSqrt | flippedSignSqrt
}

13
vendor/golang.org/x/crypto/curve25519/internal/field/fe_amd64.go generated vendored Normal file
View file

@ -0,0 +1,13 @@
// Code generated by command: go run fe_amd64_asm.go -out ../fe_amd64.s -stubs ../fe_amd64.go -pkg field. DO NOT EDIT.
// +build amd64,gc,!purego
package field
// feMul sets out = a * b. It works like feMulGeneric.
//go:noescape
func feMul(out *Element, a *Element, b *Element)
// feSquare sets out = a * a. It works like feSquareGeneric.
//go:noescape
func feSquare(out *Element, a *Element)

379
vendor/golang.org/x/crypto/curve25519/internal/field/fe_amd64.s generated vendored Normal file
View file

@ -0,0 +1,379 @@
// Code generated by command: go run fe_amd64_asm.go -out ../fe_amd64.s -stubs ../fe_amd64.go -pkg field. DO NOT EDIT.
//go:build amd64 && gc && !purego
// +build amd64,gc,!purego
#include "textflag.h"
// func feMul(out *Element, a *Element, b *Element)
TEXT ·feMul(SB), NOSPLIT, $0-24
MOVQ a+8(FP), CX
MOVQ b+16(FP), BX
// r0 = a0×b0
MOVQ (CX), AX
MULQ (BX)
MOVQ AX, DI
MOVQ DX, SI
// r0 += 19×a1×b4
MOVQ 8(CX), AX
IMUL3Q $0x13, AX, AX
MULQ 32(BX)
ADDQ AX, DI
ADCQ DX, SI
// r0 += 19×a2×b3
MOVQ 16(CX), AX
IMUL3Q $0x13, AX, AX
MULQ 24(BX)
ADDQ AX, DI
ADCQ DX, SI
// r0 += 19×a3×b2
MOVQ 24(CX), AX
IMUL3Q $0x13, AX, AX
MULQ 16(BX)
ADDQ AX, DI
ADCQ DX, SI
// r0 += 19×a4×b1
MOVQ 32(CX), AX
IMUL3Q $0x13, AX, AX
MULQ 8(BX)
ADDQ AX, DI
ADCQ DX, SI
// r1 = a0×b1
MOVQ (CX), AX
MULQ 8(BX)
MOVQ AX, R9
MOVQ DX, R8
// r1 += a1×b0
MOVQ 8(CX), AX
MULQ (BX)
ADDQ AX, R9
ADCQ DX, R8
// r1 += 19×a2×b4
MOVQ 16(CX), AX
IMUL3Q $0x13, AX, AX
MULQ 32(BX)
ADDQ AX, R9
ADCQ DX, R8
// r1 += 19×a3×b3
MOVQ 24(CX), AX
IMUL3Q $0x13, AX, AX
MULQ 24(BX)
ADDQ AX, R9
ADCQ DX, R8
// r1 += 19×a4×b2
MOVQ 32(CX), AX
IMUL3Q $0x13, AX, AX
MULQ 16(BX)
ADDQ AX, R9
ADCQ DX, R8
// r2 = a0×b2
MOVQ (CX), AX
MULQ 16(BX)
MOVQ AX, R11
MOVQ DX, R10
// r2 += a1×b1
MOVQ 8(CX), AX
MULQ 8(BX)
ADDQ AX, R11
ADCQ DX, R10
// r2 += a2×b0
MOVQ 16(CX), AX
MULQ (BX)
ADDQ AX, R11
ADCQ DX, R10
// r2 += 19×a3×b4
MOVQ 24(CX), AX
IMUL3Q $0x13, AX, AX
MULQ 32(BX)
ADDQ AX, R11
ADCQ DX, R10
// r2 += 19×a4×b3
MOVQ 32(CX), AX
IMUL3Q $0x13, AX, AX
MULQ 24(BX)
ADDQ AX, R11
ADCQ DX, R10
// r3 = a0×b3
MOVQ (CX), AX
MULQ 24(BX)
MOVQ AX, R13
MOVQ DX, R12
// r3 += a1×b2
MOVQ 8(CX), AX
MULQ 16(BX)
ADDQ AX, R13
ADCQ DX, R12
// r3 += a2×b1
MOVQ 16(CX), AX
MULQ 8(BX)
ADDQ AX, R13
ADCQ DX, R12
// r3 += a3×b0
MOVQ 24(CX), AX
MULQ (BX)
ADDQ AX, R13
ADCQ DX, R12
// r3 += 19×a4×b4
MOVQ 32(CX), AX
IMUL3Q $0x13, AX, AX
MULQ 32(BX)
ADDQ AX, R13
ADCQ DX, R12
// r4 = a0×b4
MOVQ (CX), AX
MULQ 32(BX)
MOVQ AX, R15
MOVQ DX, R14
// r4 += a1×b3
MOVQ 8(CX), AX
MULQ 24(BX)
ADDQ AX, R15
ADCQ DX, R14
// r4 += a2×b2
MOVQ 16(CX), AX
MULQ 16(BX)
ADDQ AX, R15
ADCQ DX, R14
// r4 += a3×b1
MOVQ 24(CX), AX
MULQ 8(BX)
ADDQ AX, R15
ADCQ DX, R14
// r4 += a4×b0
MOVQ 32(CX), AX
MULQ (BX)
ADDQ AX, R15
ADCQ DX, R14
// First reduction chain
MOVQ $0x0007ffffffffffff, AX
SHLQ $0x0d, DI, SI
SHLQ $0x0d, R9, R8
SHLQ $0x0d, R11, R10
SHLQ $0x0d, R13, R12
SHLQ $0x0d, R15, R14
ANDQ AX, DI
IMUL3Q $0x13, R14, R14
ADDQ R14, DI
ANDQ AX, R9
ADDQ SI, R9
ANDQ AX, R11
ADDQ R8, R11
ANDQ AX, R13
ADDQ R10, R13
ANDQ AX, R15
ADDQ R12, R15
// Second reduction chain (carryPropagate)
MOVQ DI, SI
SHRQ $0x33, SI
MOVQ R9, R8
SHRQ $0x33, R8
MOVQ R11, R10
SHRQ $0x33, R10
MOVQ R13, R12
SHRQ $0x33, R12
MOVQ R15, R14
SHRQ $0x33, R14
ANDQ AX, DI
IMUL3Q $0x13, R14, R14
ADDQ R14, DI
ANDQ AX, R9
ADDQ SI, R9
ANDQ AX, R11
ADDQ R8, R11
ANDQ AX, R13
ADDQ R10, R13
ANDQ AX, R15
ADDQ R12, R15
// Store output
MOVQ out+0(FP), AX
MOVQ DI, (AX)
MOVQ R9, 8(AX)
MOVQ R11, 16(AX)
MOVQ R13, 24(AX)
MOVQ R15, 32(AX)
RET
// func feSquare(out *Element, a *Element)
TEXT ·feSquare(SB), NOSPLIT, $0-16
MOVQ a+8(FP), CX
// r0 = l0×l0
MOVQ (CX), AX
MULQ (CX)
MOVQ AX, SI
MOVQ DX, BX
// r0 += 38×l1×l4
MOVQ 8(CX), AX
IMUL3Q $0x26, AX, AX
MULQ 32(CX)
ADDQ AX, SI
ADCQ DX, BX
// r0 += 38×l2×l3
MOVQ 16(CX), AX
IMUL3Q $0x26, AX, AX
MULQ 24(CX)
ADDQ AX, SI
ADCQ DX, BX
// r1 = 2×l0×l1
MOVQ (CX), AX
SHLQ $0x01, AX
MULQ 8(CX)
MOVQ AX, R8
MOVQ DX, DI
// r1 += 38×l2×l4
MOVQ 16(CX), AX
IMUL3Q $0x26, AX, AX
MULQ 32(CX)
ADDQ AX, R8
ADCQ DX, DI
// r1 += 19×l3×l3
MOVQ 24(CX), AX
IMUL3Q $0x13, AX, AX
MULQ 24(CX)
ADDQ AX, R8
ADCQ DX, DI
// r2 = 2×l0×l2
MOVQ (CX), AX
SHLQ $0x01, AX
MULQ 16(CX)
MOVQ AX, R10
MOVQ DX, R9
// r2 += l1×l1
MOVQ 8(CX), AX
MULQ 8(CX)
ADDQ AX, R10
ADCQ DX, R9
// r2 += 38×l3×l4
MOVQ 24(CX), AX
IMUL3Q $0x26, AX, AX
MULQ 32(CX)
ADDQ AX, R10
ADCQ DX, R9
// r3 = 2×l0×l3
MOVQ (CX), AX
SHLQ $0x01, AX
MULQ 24(CX)
MOVQ AX, R12
MOVQ DX, R11
// r3 += 2×l1×l2
MOVQ 8(CX), AX
IMUL3Q $0x02, AX, AX
MULQ 16(CX)
ADDQ AX, R12
ADCQ DX, R11
// r3 += 19×l4×l4
MOVQ 32(CX), AX
IMUL3Q $0x13, AX, AX
MULQ 32(CX)
ADDQ AX, R12
ADCQ DX, R11
// r4 = 2×l0×l4
MOVQ (CX), AX
SHLQ $0x01, AX
MULQ 32(CX)
MOVQ AX, R14
MOVQ DX, R13
// r4 += 2×l1×l3
MOVQ 8(CX), AX
IMUL3Q $0x02, AX, AX
MULQ 24(CX)
ADDQ AX, R14
ADCQ DX, R13
// r4 += l2×l2
MOVQ 16(CX), AX
MULQ 16(CX)
ADDQ AX, R14
ADCQ DX, R13
// First reduction chain
MOVQ $0x0007ffffffffffff, AX
SHLQ $0x0d, SI, BX
SHLQ $0x0d, R8, DI
SHLQ $0x0d, R10, R9
SHLQ $0x0d, R12, R11
SHLQ $0x0d, R14, R13
ANDQ AX, SI
IMUL3Q $0x13, R13, R13
ADDQ R13, SI
ANDQ AX, R8
ADDQ BX, R8
ANDQ AX, R10
ADDQ DI, R10
ANDQ AX, R12
ADDQ R9, R12
ANDQ AX, R14
ADDQ R11, R14
// Second reduction chain (carryPropagate)
MOVQ SI, BX
SHRQ $0x33, BX
MOVQ R8, DI
SHRQ $0x33, DI
MOVQ R10, R9
SHRQ $0x33, R9
MOVQ R12, R11
SHRQ $0x33, R11
MOVQ R14, R13
SHRQ $0x33, R13
ANDQ AX, SI
IMUL3Q $0x13, R13, R13
ADDQ R13, SI
ANDQ AX, R8
ADDQ BX, R8
ANDQ AX, R10
ADDQ DI, R10
ANDQ AX, R12
ADDQ R9, R12
ANDQ AX, R14
ADDQ R11, R14
// Store output
MOVQ out+0(FP), AX
MOVQ SI, (AX)
MOVQ R8, 8(AX)
MOVQ R10, 16(AX)
MOVQ R12, 24(AX)
MOVQ R14, 32(AX)
RET

12
vendor/golang.org/x/crypto/curve25519/internal/field/fe_amd64_noasm.go generated vendored Normal file
View file

@ -0,0 +1,12 @@
// Copyright (c) 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build !amd64 || !gc || purego
// +build !amd64 !gc purego
package field
func feMul(v, x, y *Element) { feMulGeneric(v, x, y) }
func feSquare(v, x *Element) { feSquareGeneric(v, x) }

16
vendor/golang.org/x/crypto/curve25519/internal/field/fe_arm64.go generated vendored Normal file
View file

@ -0,0 +1,16 @@
// Copyright (c) 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build arm64 && gc && !purego
// +build arm64,gc,!purego
package field
//go:noescape
func carryPropagate(v *Element)
func (v *Element) carryPropagate() *Element {
carryPropagate(v)
return v
}

43
vendor/golang.org/x/crypto/curve25519/internal/field/fe_arm64.s generated vendored Normal file
View file

@ -0,0 +1,43 @@
// Copyright (c) 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build arm64 && gc && !purego
// +build arm64,gc,!purego
#include "textflag.h"
// carryPropagate works exactly like carryPropagateGeneric and uses the
// same AND, ADD, and LSR+MADD instructions emitted by the compiler, but
// avoids loading R0-R4 twice and uses LDP and STP.
//
// See https://golang.org/issues/43145 for the main compiler issue.
//
// func carryPropagate(v *Element)
TEXT ·carryPropagate(SB),NOFRAME|NOSPLIT,$0-8
MOVD v+0(FP), R20
LDP 0(R20), (R0, R1)
LDP 16(R20), (R2, R3)
MOVD 32(R20), R4
AND $0x7ffffffffffff, R0, R10
AND $0x7ffffffffffff, R1, R11
AND $0x7ffffffffffff, R2, R12
AND $0x7ffffffffffff, R3, R13
AND $0x7ffffffffffff, R4, R14
ADD R0>>51, R11, R11
ADD R1>>51, R12, R12
ADD R2>>51, R13, R13
ADD R3>>51, R14, R14
// R4>>51 * 19 + R10 -> R10
LSR $51, R4, R21
MOVD $19, R22
MADD R22, R10, R21, R10
STP (R10, R11), 0(R20)
STP (R12, R13), 16(R20)
MOVD R14, 32(R20)
RET

Some files were not shown because too many files have changed in this diff Show more