forgejo/routers/private/serv.go
Wim 9066d09c57
Add ssh certificate support (#12281)
* Add ssh certificate support

* Add ssh certificate support to builtin ssh

* Write trusted-user-ca-keys.pem based on configuration

* Update app.example.ini

* Update templates/user/settings/keys_principal.tmpl

Co-authored-by: silverwind <me@silverwind.io>

* Remove unused locale string

* Update options/locale/locale_en-US.ini

Co-authored-by: silverwind <me@silverwind.io>

* Update options/locale/locale_en-US.ini

Co-authored-by: silverwind <me@silverwind.io>

* Update models/ssh_key.go

Co-authored-by: silverwind <me@silverwind.io>

* Add missing creation of SSH.Rootpath

* Update cheatsheet, example and locale strings

* Update models/ssh_key.go

Co-authored-by: zeripath <art27@cantab.net>

* Update models/ssh_key.go

Co-authored-by: zeripath <art27@cantab.net>

* Update models/ssh_key.go

Co-authored-by: zeripath <art27@cantab.net>

* Update models/ssh_key.go

Co-authored-by: zeripath <art27@cantab.net>

* Update models/ssh_key.go

* Optimizations based on feedback

* Validate CA keys for external sshd

* Add filename option and change default filename

Add a SSH_TRUSTED_USER_CA_KEYS_FILENAME option which default is
RUN_USER/.ssh/gitea-trusted-user-ca-keys.pem

Do not write a file when SSH_TRUSTED_USER_CA_KEYS is empty.

Add some more documentation.

* Remove unneeded principalkey functions

* Add blank line

* Apply suggestions from code review

Co-authored-by: zeripath <art27@cantab.net>

* Add SSH_AUTHORIZED_PRINCIPALS_ALLOW option

This adds a SSH_AUTHORIZED_PRINCIPALS_ALLOW which is default
email,username this means that users only can add the principals
that match their email or username.

To allow anything the admin need to set the option anything.

This allows for a safe default in gitea which protects against malicious
users using other user's prinicipals. (before that user could set it).

This commit also has some small other fixes from the last code review.

* Rewrite principal keys file on user deletion

* Use correct rewrite method

* Set correct AuthorizedPrincipalsBackup default setting

* Rewrite principalsfile when adding principals

* Add update authorized_principals option to admin dashboard

* Handle non-primary emails

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Add the command actually to the dashboard template

* Update models/ssh_key.go

Co-authored-by: silverwind <me@silverwind.io>

* By default do not show principal options unless there are CA keys set or they are explicitly set

Signed-off-by: Andrew Thornton <art27@cantab.net>

* allow settings when enabled

* Fix typos in TrustedUserCAKeys path

* Allow every CASignatureAlgorithms algorithm

As this depends on the content of TrustedUserCAKeys we should allow all
signature algorithms as admins can choose the specific algorithm on their
signing CA

* Update models/ssh_key.go

Co-authored-by: Lauris BH <lauris@nix.lv>

* Fix linting issue

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: techknowlogick <matti@mdranta.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
2020-10-10 20:38:09 -04:00

392 lines
13 KiB
Go

// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
// Package private includes all internal routes. The package name internal is ideal but Golang is not allowed, so we use private as package name instead.
package private
import (
"fmt"
"net/http"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/private"
"code.gitea.io/gitea/modules/setting"
repo_service "code.gitea.io/gitea/services/repository"
wiki_service "code.gitea.io/gitea/services/wiki"
"gitea.com/macaron/macaron"
)
// ServNoCommand returns information about the provided keyid
func ServNoCommand(ctx *macaron.Context) {
keyID := ctx.ParamsInt64(":keyid")
if keyID <= 0 {
ctx.JSON(http.StatusBadRequest, map[string]interface{}{
"err": fmt.Sprintf("Bad key id: %d", keyID),
})
}
results := private.KeyAndOwner{}
key, err := models.GetPublicKeyByID(keyID)
if err != nil {
if models.IsErrKeyNotExist(err) {
ctx.JSON(http.StatusUnauthorized, map[string]interface{}{
"err": fmt.Sprintf("Cannot find key: %d", keyID),
})
return
}
log.Error("Unable to get public key: %d Error: %v", keyID, err)
ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
"err": err.Error(),
})
return
}
results.Key = key
if key.Type == models.KeyTypeUser || key.Type == models.KeyTypePrincipal {
user, err := models.GetUserByID(key.OwnerID)
if err != nil {
if models.IsErrUserNotExist(err) {
ctx.JSON(http.StatusUnauthorized, map[string]interface{}{
"err": fmt.Sprintf("Cannot find owner with id: %d for key: %d", key.OwnerID, keyID),
})
return
}
log.Error("Unable to get owner with id: %d for public key: %d Error: %v", key.OwnerID, keyID, err)
ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
"err": err.Error(),
})
return
}
results.Owner = user
}
ctx.JSON(http.StatusOK, &results)
}
// ServCommand returns information about the provided keyid
func ServCommand(ctx *macaron.Context) {
keyID := ctx.ParamsInt64(":keyid")
ownerName := ctx.Params(":owner")
repoName := ctx.Params(":repo")
mode := models.AccessMode(ctx.QueryInt("mode"))
// Set the basic parts of the results to return
results := private.ServCommandResults{
RepoName: repoName,
OwnerName: ownerName,
KeyID: keyID,
}
// Now because we're not translating things properly let's just default some English strings here
modeString := "read"
if mode > models.AccessModeRead {
modeString = "write to"
}
// The default unit we're trying to look at is code
unitType := models.UnitTypeCode
// Unless we're a wiki...
if strings.HasSuffix(repoName, ".wiki") {
// in which case we need to look at the wiki
unitType = models.UnitTypeWiki
// And we'd better munge the reponame and tell downstream we're looking at a wiki
results.IsWiki = true
results.RepoName = repoName[:len(repoName)-5]
}
// Now get the Repository and set the results section
repoExist := true
repo, err := models.GetRepositoryByOwnerAndName(results.OwnerName, results.RepoName)
if err != nil {
if models.IsErrRepoNotExist(err) {
repoExist = false
for _, verb := range ctx.QueryStrings("verb") {
if "git-upload-pack" == verb {
// User is fetching/cloning a non-existent repository
ctx.JSON(http.StatusNotFound, map[string]interface{}{
"results": results,
"type": "ErrRepoNotExist",
"err": fmt.Sprintf("Cannot find repository: %s/%s", results.OwnerName, results.RepoName),
})
return
}
}
} else {
log.Error("Unable to get repository: %s/%s Error: %v", results.OwnerName, results.RepoName, err)
ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
"results": results,
"type": "InternalServerError",
"err": fmt.Sprintf("Unable to get repository: %s/%s %v", results.OwnerName, results.RepoName, err),
})
return
}
}
if repoExist {
repo.OwnerName = ownerName
results.RepoID = repo.ID
if repo.IsBeingCreated() {
ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
"results": results,
"type": "InternalServerError",
"err": "Repository is being created, you could retry after it finished",
})
return
}
// We can shortcut at this point if the repo is a mirror
if mode > models.AccessModeRead && repo.IsMirror {
ctx.JSON(http.StatusUnauthorized, map[string]interface{}{
"results": results,
"type": "ErrMirrorReadOnly",
"err": fmt.Sprintf("Mirror Repository %s/%s is read-only", results.OwnerName, results.RepoName),
})
return
}
}
// Get the Public Key represented by the keyID
key, err := models.GetPublicKeyByID(keyID)
if err != nil {
if models.IsErrKeyNotExist(err) {
ctx.JSON(http.StatusUnauthorized, map[string]interface{}{
"results": results,
"type": "ErrKeyNotExist",
"err": fmt.Sprintf("Cannot find key: %d", keyID),
})
return
}
log.Error("Unable to get public key: %d Error: %v", keyID, err)
ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
"results": results,
"type": "InternalServerError",
"err": fmt.Sprintf("Unable to get key: %d Error: %v", keyID, err),
})
return
}
results.KeyName = key.Name
results.KeyID = key.ID
results.UserID = key.OwnerID
// If repo doesn't exist, deploy key doesn't make sense
if !repoExist && key.Type == models.KeyTypeDeploy {
ctx.JSON(http.StatusNotFound, map[string]interface{}{
"results": results,
"type": "ErrRepoNotExist",
"err": fmt.Sprintf("Cannot find repository %s/%s", results.OwnerName, results.RepoName),
})
return
}
// Deploy Keys have ownerID set to 0 therefore we can't use the owner
// So now we need to check if the key is a deploy key
// We'll keep hold of the deploy key here for permissions checking
var deployKey *models.DeployKey
var user *models.User
if key.Type == models.KeyTypeDeploy {
results.IsDeployKey = true
var err error
deployKey, err = models.GetDeployKeyByRepo(key.ID, repo.ID)
if err != nil {
if models.IsErrDeployKeyNotExist(err) {
ctx.JSON(http.StatusUnauthorized, map[string]interface{}{
"results": results,
"type": "ErrDeployKeyNotExist",
"err": fmt.Sprintf("Public (Deploy) Key: %d:%s is not authorized to %s %s/%s.", key.ID, key.Name, modeString, results.OwnerName, results.RepoName),
})
return
}
log.Error("Unable to get deploy for public (deploy) key: %d in %-v Error: %v", key.ID, repo, err)
ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
"results": results,
"type": "InternalServerError",
"err": fmt.Sprintf("Unable to get Deploy Key for Public Key: %d:%s in %s/%s.", key.ID, key.Name, results.OwnerName, results.RepoName),
})
return
}
results.KeyName = deployKey.Name
// FIXME: Deploy keys aren't really the owner of the repo pushing changes
// however we don't have good way of representing deploy keys in hook.go
// so for now use the owner of the repository
results.UserName = results.OwnerName
results.UserID = repo.OwnerID
if err = repo.GetOwner(); err != nil {
log.Error("Unable to get owner for repo %-v. Error: %v", repo, err)
ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
"results": results,
"type": "InternalServerError",
"err": fmt.Sprintf("Unable to get owner for repo: %s/%s.", results.OwnerName, results.RepoName),
})
return
}
if !repo.Owner.KeepEmailPrivate {
results.UserEmail = repo.Owner.Email
}
} else {
// Get the user represented by the Key
var err error
user, err = models.GetUserByID(key.OwnerID)
if err != nil {
if models.IsErrUserNotExist(err) {
ctx.JSON(http.StatusUnauthorized, map[string]interface{}{
"results": results,
"type": "ErrUserNotExist",
"err": fmt.Sprintf("Public Key: %d:%s owner %d does not exist.", key.ID, key.Name, key.OwnerID),
})
return
}
log.Error("Unable to get owner: %d for public key: %d:%s Error: %v", key.OwnerID, key.ID, key.Name, err)
ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
"results": results,
"type": "InternalServerError",
"err": fmt.Sprintf("Unable to get Owner: %d for Deploy Key: %d:%s in %s/%s.", key.OwnerID, key.ID, key.Name, ownerName, repoName),
})
return
}
results.UserName = user.Name
if !user.KeepEmailPrivate {
results.UserEmail = user.Email
}
}
// Don't allow pushing if the repo is archived
if repoExist && mode > models.AccessModeRead && repo.IsArchived {
ctx.JSON(http.StatusUnauthorized, map[string]interface{}{
"results": results,
"type": "ErrRepoIsArchived",
"err": fmt.Sprintf("Repo: %s/%s is archived.", results.OwnerName, results.RepoName),
})
return
}
// Permissions checking:
if repoExist && (mode > models.AccessModeRead || repo.IsPrivate || setting.Service.RequireSignInView) {
if key.Type == models.KeyTypeDeploy {
if deployKey.Mode < mode {
ctx.JSON(http.StatusUnauthorized, map[string]interface{}{
"results": results,
"type": "ErrUnauthorized",
"err": fmt.Sprintf("Deploy Key: %d:%s is not authorized to %s %s/%s.", key.ID, key.Name, modeString, results.OwnerName, results.RepoName),
})
return
}
} else {
perm, err := models.GetUserRepoPermission(repo, user)
if err != nil {
log.Error("Unable to get permissions for %-v with key %d in %-v Error: %v", user, key.ID, repo, err)
ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
"results": results,
"type": "InternalServerError",
"err": fmt.Sprintf("Unable to get permissions for user %d:%s with key %d in %s/%s Error: %v", user.ID, user.Name, key.ID, results.OwnerName, results.RepoName, err),
})
return
}
userMode := perm.UnitAccessMode(unitType)
if userMode < mode {
ctx.JSON(http.StatusUnauthorized, map[string]interface{}{
"results": results,
"type": "ErrUnauthorized",
"err": fmt.Sprintf("User: %d:%s with Key: %d:%s is not authorized to %s %s/%s.", user.ID, user.Name, key.ID, key.Name, modeString, ownerName, repoName),
})
return
}
}
}
// We already know we aren't using a deploy key
if !repoExist {
owner, err := models.GetUserByName(ownerName)
if err != nil {
ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
"results": results,
"type": "InternalServerError",
"err": fmt.Sprintf("Unable to get owner: %s %v", results.OwnerName, err),
})
return
}
if owner.IsOrganization() && !setting.Repository.EnablePushCreateOrg {
ctx.JSON(http.StatusForbidden, map[string]interface{}{
"results": results,
"type": "ErrForbidden",
"err": "Push to create is not enabled for organizations.",
})
return
}
if !owner.IsOrganization() && !setting.Repository.EnablePushCreateUser {
ctx.JSON(http.StatusForbidden, map[string]interface{}{
"results": results,
"type": "ErrForbidden",
"err": "Push to create is not enabled for users.",
})
return
}
repo, err = repo_service.PushCreateRepo(user, owner, results.RepoName)
if err != nil {
log.Error("pushCreateRepo: %v", err)
ctx.JSON(http.StatusNotFound, map[string]interface{}{
"results": results,
"type": "ErrRepoNotExist",
"err": fmt.Sprintf("Cannot find repository: %s/%s", results.OwnerName, results.RepoName),
})
return
}
results.RepoID = repo.ID
}
if results.IsWiki {
// Ensure the wiki is enabled before we allow access to it
if _, err := repo.GetUnit(models.UnitTypeWiki); err != nil {
if models.IsErrUnitTypeNotExist(err) {
ctx.JSON(http.StatusForbidden, map[string]interface{}{
"results": results,
"type": "ErrForbidden",
"err": "repository wiki is disabled",
})
return
}
log.Error("Failed to get the wiki unit in %-v Error: %v", repo, err)
ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
"results": results,
"type": "InternalServerError",
"err": fmt.Sprintf("Failed to get the wiki unit in %s/%s Error: %v", ownerName, repoName, err),
})
return
}
// Finally if we're trying to touch the wiki we should init it
if err = wiki_service.InitWiki(repo); err != nil {
log.Error("Failed to initialize the wiki in %-v Error: %v", repo, err)
ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
"results": results,
"type": "InternalServerError",
"err": fmt.Sprintf("Failed to initialize the wiki in %s/%s Error: %v", ownerName, repoName, err),
})
return
}
}
log.Debug("Serv Results:\nIsWiki: %t\nIsDeployKey: %t\nKeyID: %d\tKeyName: %s\nUserName: %s\nUserID: %d\nOwnerName: %s\nRepoName: %s\nRepoID: %d",
results.IsWiki,
results.IsDeployKey,
results.KeyID,
results.KeyName,
results.UserName,
results.UserID,
results.OwnerName,
results.RepoName,
results.RepoID)
ctx.JSON(http.StatusOK, results)
// We will update the keys in a different call.
}