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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"
"path/filepath"
"strings"
"time"
"github.com/Unknwon/com"
"github.com/codegangsta/cli"
"github.com/gogits/gogs/models"
"github.com/gogits/gogs/modules/log"
"github.com/gogits/gogs/modules/setting"
"github.com/gogits/gogs/modules/uuid"
)
var CmdServ = 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{},
}
func setup(logPath string) {
setting.NewConfigContext()
log.NewGitLogger(filepath.Join(setting.LogRootPath, logPath))
if setting.DisableSSH {
println("Gogs: SSH has been disabled")
os.Exit(1)
}
models.LoadModelsConfig()
if models.UseSQLite3 {
workDir, _ := setting.WorkDir()
os.Chdir(workDir)
}
models.SetEngine()
}
func parseCmd(cmd string) (string, string) {
ss := strings.SplitN(cmd, " ", 2)
if len(ss) != 2 {
return "", ""
}
verb, args := ss[0], ss[1]
if verb == "git" {
ss = strings.SplitN(args, " ", 2)
args = ss[1]
verb = fmt.Sprintf("%s %s", verb, ss[0])
}
return verb, strings.Replace(args, "'/", "'", 1)
}
var (
COMMANDS_READONLY = map[string]models.AccessType{
"git-upload-pack": models.WRITABLE,
"git upload-pack": models.WRITABLE,
"git-upload-archive": models.WRITABLE,
}
COMMANDS_WRITE = map[string]models.AccessType{
"git-receive-pack": models.READABLE,
"git receive-pack": models.READABLE,
}
)
func In(b string, sl map[string]models.AccessType) bool {
_, e := sl[b]
return e
}
func runServ(k *cli.Context) {
setup("serv.log")
keys := strings.Split(os.Args[2], "-")
if len(keys) != 2 {
println("Gogs: auth file format error")
log.GitLogger.Fatal(2, "Invalid auth file format: %s", os.Args[2])
}
keyId, err := com.StrTo(keys[1]).Int64()
if err != nil {
println("Gogs: auth file format error")
log.GitLogger.Fatal(2, "Invalid auth file format: %v", err)
}
user, err := models.GetUserByKeyId(keyId)
if err != nil {
if err == models.ErrUserNotKeyOwner {
println("Gogs: you are not the owner of SSH key")
log.GitLogger.Fatal(2, "Invalid owner of SSH key: %d", keyId)
}
println("Gogs: internal error:", err.Error())
log.GitLogger.Fatal(2, "Fail to get user by key ID(%d): %v", keyId, err)
}
cmd := os.Getenv("SSH_ORIGINAL_COMMAND")
if cmd == "" {
println("Hi", user.Name, "! You've successfully authenticated, but Gogs does not provide shell access.")
return
}
verb, args := parseCmd(cmd)
repoPath := strings.Trim(args, "'")
rr := strings.SplitN(repoPath, "/", 2)
if len(rr) != 2 {
println("Gogs: unavailable repository", args)
log.GitLogger.Fatal(2, "Unavailable repository: %v", args)
}
repoUserName := rr[0]
repoName := strings.TrimSuffix(rr[1], ".git")
isWrite := In(verb, COMMANDS_WRITE)
isRead := In(verb, COMMANDS_READONLY)
repoUser, err := models.GetUserByName(repoUserName)
if err != nil {
if err == models.ErrUserNotExist {
println("Gogs: given repository owner are not registered")
log.GitLogger.Fatal(2, "Unregistered owner: %s", repoUserName)
}
println("Gogs: internal error:", err.Error())
log.GitLogger.Fatal(2, "Fail to get repository owner(%s): %v", repoUserName, err)
}
// Access check.
switch {
case isWrite:
has, err := models.HasAccess(user.Name, path.Join(repoUserName, repoName), models.WRITABLE)
if err != nil {
println("Gogs: internal error:", err.Error())
log.GitLogger.Fatal(2, "Fail to check write access:", err)
} else if !has {
println("You have no right to write this repository")
log.GitLogger.Fatal(2, "User %s has no right to write repository %s", user.Name, repoPath)
}
case isRead:
repo, err := models.GetRepositoryByName(repoUser.Id, repoName)
if err != nil {
if err == models.ErrRepoNotExist {
println("Gogs: given repository does not exist")
log.GitLogger.Fatal(2, "Repository does not exist: %s/%s", repoUser.Name, repoName)
}
println("Gogs: internal error:", err.Error())
log.GitLogger.Fatal(2, "Fail to get repository: %v", err)
}
if !repo.IsPrivate {
break
}
has, err := models.HasAccess(user.Name, path.Join(repoUserName, repoName), models.READABLE)
if err != nil {
println("Gogs: internal error:", err.Error())
log.GitLogger.Fatal(2, "Fail to check read access:", err)
} else if !has {
println("You have no right to access this repository")
log.GitLogger.Fatal(2, "User %s has no right to read repository %s", user.Name, repoPath)
}
default:
println("Unknown command: " + cmd)
return
}
uuid := uuid.NewV4().String()
os.Setenv("uuid", uuid)
var gitcmd *exec.Cmd
verbs := strings.Split(verb, " ")
if len(verbs) == 2 {
gitcmd = exec.Command(verbs[0], verbs[1], repoPath)
} else {
gitcmd = exec.Command(verb, repoPath)
}
gitcmd.Dir = setting.RepoRootPath
gitcmd.Stdout = os.Stdout
gitcmd.Stdin = os.Stdin
gitcmd.Stderr = os.Stderr
if err = gitcmd.Run(); err != nil {
println("Gogs: internal error:", err.Error())
log.GitLogger.Fatal(2, "Fail to execute git command: %v", err)
}
if isWrite {
tasks, err := models.GetUpdateTasksByUuid(uuid)
if err != nil {
log.GitLogger.Fatal(2, "GetUpdateTasksByUuid: %v", err)
}
for _, task := range tasks {
err = models.Update(task.RefName, task.OldCommitId, task.NewCommitId,
user.Name, repoUserName, repoName, user.Id)
if err != nil {
log.GitLogger.Error(2, "Fail to update: %v", err)
}
}
if err = models.DelUpdateTasksByUuid(uuid); err != nil {
log.GitLogger.Fatal(2, "DelUpdateTasksByUuid: %v", err)
}
}
// Update key activity.
key, err := models.GetPublicKeyById(keyId)
if err != nil {
log.GitLogger.Fatal(2, "GetPublicKeyById: %v", err)
}
key.Updated = time.Now()
if err = models.UpdatePublicKey(key); err != nil {
log.GitLogger.Fatal(2, "UpdatePublicKey: %v", err)
}
}
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