woodpecker/server/services/registry/filesystem.go

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// Copyright 2023 Woodpecker Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package registry
import (
"encoding/base64"
"encoding/json"
"fmt"
"os"
"strings"
"github.com/docker/cli/cli/config/configfile"
"github.com/docker/cli/cli/config/types"
"go.woodpecker-ci.org/woodpecker/v2/server/model"
)
type filesystem struct {
path string
}
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func NewFilesystem(path string) ReadOnlyService {
return &filesystem{path}
}
func parseDockerConfig(path string) ([]*model.Registry, error) {
if path == "" {
return nil, nil
}
f, err := os.Open(path)
if err != nil {
return nil, err
}
defer f.Close()
configFile := configfile.ConfigFile{
AuthConfigs: make(map[string]types.AuthConfig),
}
if err := json.NewDecoder(f).Decode(&configFile); err != nil {
return nil, err
}
for registryHostname := range configFile.CredentialHelpers {
newAuth, err := configFile.GetAuthConfig(registryHostname)
if err == nil {
configFile.AuthConfigs[registryHostname] = newAuth
}
}
for addr, ac := range configFile.AuthConfigs {
if ac.Auth != "" {
ac.Username, ac.Password, err = decodeAuth(ac.Auth)
if err != nil {
return nil, err
}
ac.Auth = ""
ac.ServerAddress = addr
configFile.AuthConfigs[addr] = ac
}
}
var auths []*model.Registry
for key, auth := range configFile.AuthConfigs {
auths = append(auths, &model.Registry{
Address: key,
Username: auth.Username,
Password: auth.Password,
})
}
return auths, nil
}
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func (f *filesystem) RegistryFind(*model.Repo, string) (*model.Registry, error) {
return nil, nil
}
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func (f *filesystem) RegistryList(_ *model.Repo, p *model.ListOptions) ([]*model.Registry, error) {
regs, err := parseDockerConfig(f.path)
if err != nil {
return nil, err
}
return model.ApplyPagination(p, regs), nil
}
// decodeAuth decodes a base64 encoded string and returns username and password
func decodeAuth(authStr string) (string, string, error) {
if authStr == "" {
return "", "", nil
}
decLen := base64.StdEncoding.DecodedLen(len(authStr))
decoded := make([]byte, decLen)
authByte := []byte(authStr)
n, err := base64.StdEncoding.Decode(decoded, authByte)
if err != nil {
return "", "", err
}
if n > decLen {
return "", "", fmt.Errorf("something went wrong decoding auth config")
}
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before, after, _ := strings.Cut(string(decoded), ":")
if before == "" || after == "" {
return "", "", fmt.Errorf("invalid auth configuration file")
}
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password := strings.Trim(after, "\x00")
return before, password, nil
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}