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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/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"
)
const (
_ACCESS_DENIED_MESSAGE = "Repository does not exist or you do not have access"
)
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{
cli.StringFlag{"config, c", "custom/conf/app.ini", "Custom configuration file path", ""},
},
}
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 setting.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 "", ""
}
return ss[0], strings.Replace(ss[1], "'/", "'", 1)
}
var (
COMMANDS = 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) {
if c.IsSet("config") {
setting.CustomConf = c.String("config")
}
setup("serv.log")
fail := func(userMessage, logMessage string, args ...interface{}) {
fmt.Fprintln(os.Stderr, "Gogs: ", userMessage)
log.GitLogger.Fatal(2, logMessage, args...)
}
if len(c.Args()) < 1 {
fail("Not enough arguments", "Not enough arugments")
}
keys := strings.Split(c.Args()[0], "-")
if len(keys) != 2 {
fail("key-id format error", "Invalid key id: %s", c.Args()[0])
}
keyId, err := com.StrTo(keys[1]).Int64()
if err != nil {
fail("key-id format error", "Invalid key id: %s", err)
}
user, err := models.GetUserByKeyId(keyId)
if err != nil {
fail("internal error", "Fail to get user by key ID(%d): %v", keyId, err)
}
cmd := os.Getenv("SSH_ORIGINAL_COMMAND")
if cmd == "" {
fmt.Printf("Hi, %s! You've successfully authenticated, but Gogs does not provide shell access.\n", user.Name)
if user.IsAdmin {
println("If this is unexpected, please log in with password and setup Gogs under another user.")
}
return
}
verb, args := parseCmd(cmd)
repoPath := strings.Trim(args, "'")
rr := strings.SplitN(repoPath, "/", 2)
if len(rr) != 2 {
fail("Invalid repository path", "Invalide repository path: %v", args)
}
repoUserName := rr[0]
repoName := strings.TrimSuffix(rr[1], ".git")
repoUser, err := models.GetUserByName(repoUserName)
if err != nil {
if err == models.ErrUserNotExist {
fail("Repository owner does not exist", "Unregistered owner: %s", repoUserName)
}
fail("Internal error", "Fail to get repository owner(%s): %v", repoUserName, err)
}
repo, err := models.GetRepositoryByName(repoUser.Id, repoName)
if err != nil {
if models.IsErrRepoNotExist(err) {
if user.Id == repoUser.Id || repoUser.IsOwnedBy(user.Id) {
fail("Repository does not exist", "Repository does not exist: %s/%s", repoUser.Name, repoName)
} else {
fail(_ACCESS_DENIED_MESSAGE, "Repository does not exist: %s/%s", repoUser.Name, repoName)
}
}
fail("Internal error", "Fail to get repository: %v", err)
}
requestedMode, has := COMMANDS[verb]
if !has {
fail("Unknown git command", "Unknown git command %s", verb)
}
mode, err := models.AccessLevel(user, repo)
if err != nil {
fail("Internal error", "Fail to check access: %v", err)
} else if mode < requestedMode {
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, requestedMode, repoPath)
}
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 {
fail("Internal error", "Fail to execute git command: %v", err)
}
if requestedMode == models.ACCESS_MODE_WRITE {
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 {
fail("Internal error", "GetPublicKeyById: %v", err)
}
key.Updated = time.Now()
if err = models.UpdatePublicKey(key); err != nil {
fail("Internal error", "UpdatePublicKey: %v", err)
}
}
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