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// Copyright 2014 The Gogs 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 cmd
import (
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
"time"
"github.com/Unknwon/com"
"github.com/urfave/cli"
log "gopkg.in/clog.v1"
"github.com/gogits/gogs/models"
"github.com/gogits/gogs/models/errors"
"github.com/gogits/gogs/pkg/setting"
http "github.com/gogits/gogs/routers/repo"
)
const (
_ACCESS_DENIED_MESSAGE = "Repository does not exist or you do not have access"
)
var Serv = cli.Command{
Name: "serv",
Usage: "This command should only be called by SSH shell",
Description: `Serv provide access auth for repositories`,
Action: runServ,
Flags: []cli.Flag{
stringFlag("config, c", "custom/conf/app.ini", "Custom configuration file path"),
},
}
func fail(userMessage, logMessage string, args ...interface{}) {
fmt.Fprintln(os.Stderr, "Gogs:", userMessage)
if len(logMessage) > 0 {
if !setting.ProdMode {
fmt.Fprintf(os.Stderr, logMessage+"\n", args...)
}
log.Fatal(3, logMessage, args...)
}
os.Exit(1)
}
func setup(c *cli.Context, logPath string, connectDB bool) {
if c.IsSet("config") {
setting.CustomConf = c.String("config")
} else if c.GlobalIsSet("config") {
setting.CustomConf = c.GlobalString("config")
}
setting.NewContext()
level := log.TRACE
if setting.ProdMode {
level = log.ERROR
}
log.New(log.FILE, log.FileConfig{
Level: level,
Filename: filepath.Join(setting.LogRootPath, logPath),
FileRotationConfig: log.FileRotationConfig{
Rotate: true,
Daily: true,
MaxDays: 3,
},
})
log.Delete(log.CONSOLE) // Remove primary logger
if !connectDB {
return
}
models.LoadConfigs()
if setting.UseSQLite3 {
workDir, _ := setting.WorkDir()
os.Chdir(workDir)
}
if err := models.SetEngine(); err != nil {
fail("Internal error", "SetEngine: %v", err)
}
}
func parseSSHCmd(cmd string) (string, string) {
ss := strings.SplitN(cmd, " ", 2)
if len(ss) != 2 {
return "", ""
}
return ss[0], strings.Replace(ss[1], "'/", "'", 1)
}
func checkDeployKey(key *models.PublicKey, repo *models.Repository) {
// Check if this deploy key belongs to current repository.
if !models.HasDeployKey(key.ID, repo.ID) {
fail("Key access denied", "Deploy key access denied: [key_id: %d, repo_id: %d]", key.ID, repo.ID)
}
// Update deploy key activity.
deployKey, err := models.GetDeployKeyByRepo(key.ID, repo.ID)
if err != nil {
fail("Internal error", "GetDeployKey: %v", err)
}
deployKey.Updated = time.Now()
if err = models.UpdateDeployKey(deployKey); err != nil {
fail("Internal error", "UpdateDeployKey: %v", err)
}
}
var (
allowedCommands = map[string]models.AccessMode{
"git-upload-pack": models.ACCESS_MODE_READ,
"git-upload-archive": models.ACCESS_MODE_READ,
"git-receive-pack": models.ACCESS_MODE_WRITE,
}
)
func runServ(c *cli.Context) error {
setup(c, "serv.log", true)
if setting.SSH.Disabled {
println("Gogs: SSH has been disabled")
return nil
}
if len(c.Args()) < 1 {
fail("Not enough arguments", "Not enough arguments")
}
sshCmd := os.Getenv("SSH_ORIGINAL_COMMAND")
if len(sshCmd) == 0 {
println("Hi there, You've successfully authenticated, but Gogs does not provide shell access.")
println("If this is unexpected, please log in with password and setup Gogs under another user.")
return nil
}
verb, args := parseSSHCmd(sshCmd)
repoFullName := strings.ToLower(strings.Trim(args, "'"))
repoFields := strings.SplitN(repoFullName, "/", 2)
if len(repoFields) != 2 {
fail("Invalid repository path", "Invalid repository path: %v", args)
}
ownerName := strings.ToLower(repoFields[0])
repoName := strings.TrimSuffix(strings.ToLower(repoFields[1]), ".git")
repoName = strings.TrimSuffix(repoName, ".wiki")
owner, err := models.GetUserByName(ownerName)
if err != nil {
if errors.IsUserNotExist(err) {
fail("Repository owner does not exist", "Unregistered owner: %s", ownerName)
}
fail("Internal error", "Fail to get repository owner '%s': %v", ownerName, err)
}
repo, err := models.GetRepositoryByName(owner.ID, repoName)
if err != nil {
if errors.IsRepoNotExist(err) {
fail(_ACCESS_DENIED_MESSAGE, "Repository does not exist: %s/%s", owner.Name, repoName)
}
fail("Internal error", "Fail to get repository: %v", err)
}
repo.Owner = owner
requestMode, ok := allowedCommands[verb]
if !ok {
fail("Unknown git command", "Unknown git command '%s'", verb)
}
// Prohibit push to mirror repositories.
if requestMode > models.ACCESS_MODE_READ && repo.IsMirror {
fail("Mirror repository is read-only", "")
}
// Allow anonymous (user is nil) clone for public repositories.
var user *models.User
key, err := models.GetPublicKeyByID(com.StrTo(strings.TrimPrefix(c.Args()[0], "key-")).MustInt64())
if err != nil {
fail("Invalid key ID", "Invalid key ID '%s': %v", c.Args()[0], err)
}
if requestMode == models.ACCESS_MODE_WRITE || repo.IsPrivate {
// Check deploy key or user key.
if key.IsDeployKey() {
if key.Mode < requestMode {
fail("Key permission denied", "Cannot push with deployment key: %d", key.ID)
}
checkDeployKey(key, repo)
} else {
user, err = models.GetUserByKeyID(key.ID)
if err != nil {
fail("Internal error", "Fail to get user by key ID '%d': %v", key.ID, err)
}
mode, err := models.AccessLevel(user.ID, repo)
if err != nil {
fail("Internal error", "Fail to check access: %v", err)
}
if mode < requestMode {
clientMessage := _ACCESS_DENIED_MESSAGE
if mode >= models.ACCESS_MODE_READ {
clientMessage = "You do not have sufficient authorization for this action"
}
fail(clientMessage,
"User '%s' does not have level '%v' access to repository '%s'",
user.Name, requestMode, repoFullName)
}
}
} else {
setting.NewService()
// Check if the key can access to the repository in case of it is a deploy key (a deploy keys != user key).
// A deploy key doesn't represent a signed in user, so in a site with Service.RequireSignInView activated
// we should give read access only in repositories where this deploy key is in use. In other case, a server
// or system using an active deploy key can get read access to all the repositories in a Gogs service.
if key.IsDeployKey() && setting.Service.RequireSignInView {
checkDeployKey(key, repo)
}
}
// Update user key activity.
if key.ID > 0 {
key, err := models.GetPublicKeyByID(key.ID)
if err != nil {
fail("Internal error", "GetPublicKeyByID: %v", err)
}
key.Updated = time.Now()
if err = models.UpdatePublicKey(key); err != nil {
fail("Internal error", "UpdatePublicKey: %v", err)
}
}
// Special handle for Windows.
if setting.IsWindows {
verb = strings.Replace(verb, "-", " ", 1)
}
var gitCmd *exec.Cmd
verbs := strings.Split(verb, " ")
if len(verbs) == 2 {
gitCmd = exec.Command(verbs[0], verbs[1], repoFullName)
} else {
gitCmd = exec.Command(verb, repoFullName)
}
if requestMode == models.ACCESS_MODE_WRITE {
gitCmd.Env = append(os.Environ(), http.ComposeHookEnvs(http.ComposeHookEnvsOptions{
AuthUser: user,
OwnerName: owner.Name,
OwnerSalt: owner.Salt,
RepoID: repo.ID,
RepoName: repo.Name,
RepoPath: repo.RepoPath(),
})...)
}
gitCmd.Dir = setting.RepoRootPath
gitCmd.Stdout = os.Stdout
gitCmd.Stdin = os.Stdin
gitCmd.Stderr = os.Stderr
if err = gitCmd.Run(); err != nil {
fail("Internal error", "Fail to execute git command: %v", err)
}
return nil
}