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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 main
import (
//"container/list"
"fmt"
"os"
"os/exec"
"path"
"strconv"
"strings"
"github.com/codegangsta/cli"
qlog "github.com/qiniu/log"
//"github.com/gogits/git"
"github.com/gogits/gogs/models"
"github.com/gogits/gogs/modules/base"
)
var (
COMMANDS_READONLY = map[string]int{
"git-upload-pack": models.AU_WRITABLE,
"git upload-pack": models.AU_WRITABLE,
"git-upload-archive": models.AU_WRITABLE,
}
COMMANDS_WRITE = map[string]int{
"git-receive-pack": models.AU_READABLE,
"git receive-pack": models.AU_READABLE,
}
)
var CmdServ = cli.Command{
Name: "serv",
Usage: "This command just should be called by ssh shell",
Description: `
gogs serv provide access auth for repositories`,
Action: runServ,
Flags: []cli.Flag{},
}
func newLogger(execDir string) {
logPath := execDir + "/log/serv.log"
os.MkdirAll(path.Dir(logPath), os.ModePerm)
f, err := os.OpenFile(logPath, os.O_WRONLY|os.O_APPEND|os.O_CREATE, os.ModePerm)
if err != nil {
qlog.Fatal(err)
}
qlog.SetOutput(f)
qlog.Info("Start logging serv...")
}
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, args
}
func In(b string, sl map[string]int) bool {
_, e := sl[b]
return e
}
func runServ(k *cli.Context) {
execDir, _ := base.ExecDir()
newLogger(execDir)
base.NewConfigContext()
models.LoadModelsConfig()
if models.UseSQLite3 {
os.Chdir(execDir)
}
models.SetEngine()
keys := strings.Split(os.Args[2], "-")
if len(keys) != 2 {
println("auth file format error")
qlog.Fatal("auth file format error")
}
keyId, err := strconv.ParseInt(keys[1], 10, 64)
if err != nil {
println("auth file format error")
qlog.Fatal("auth file format error", err)
}
user, err := models.GetUserByKeyId(keyId)
if err != nil {
println("You have no right to access")
qlog.Fatalf("SSH visit error: %v", 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("Unavilable repository", args)
qlog.Fatalf("Unavilable repository %v", args)
}
repoUserName := rr[0]
repoName := rr[1]
if strings.HasSuffix(repoName, ".git") {
repoName = repoName[:len(repoName)-4]
}
isWrite := In(verb, COMMANDS_WRITE)
isRead := In(verb, COMMANDS_READONLY)
repoUser, err := models.GetUserByName(repoUserName)
if err != nil {
println("You have no right to access")
qlog.Fatal("Get user failed", err)
}
// access check
switch {
case isWrite:
has, err := models.HasAccess(user.LowerName, path.Join(repoUserName, repoName), models.AU_WRITABLE)
if err != nil {
println("Inernel error:", err)
qlog.Fatal(err)
} else if !has {
println("You have no right to write this repository")
qlog.Fatalf("User %s has no right to write repository %s", user.Name, repoPath)
}
case isRead:
repo, err := models.GetRepositoryByName(repoUser.Id, repoName)
if err != nil {
println("Get repository error:", err)
qlog.Fatal("Get repository error: " + err.Error())
}
if !repo.IsPrivate {
break
}
has, err := models.HasAccess(user.Name, repoPath, models.AU_READABLE)
if err != nil {
println("Inernel error")
qlog.Fatal(err)
}
if !has {
has, err = models.HasAccess(user.Name, repoPath, models.AU_WRITABLE)
if err != nil {
println("Inernel error")
qlog.Fatal(err)
}
}
if !has {
println("You have no right to access this repository")
qlog.Fatal("You have no right to access this repository")
}
default:
println("Unknown command")
qlog.Fatal("Unknown command")
}
models.SetRepoEnvs(user.Id, user.Name, repoName)
gitcmd := exec.Command(verb, repoPath)
gitcmd.Dir = base.RepoRootPath
gitcmd.Stdout = os.Stdout
gitcmd.Stdin = os.Stdin
gitcmd.Stderr = os.Stderr
if err = gitcmd.Run(); err != nil {
println("execute command error:", err.Error())
qlog.Fatal("execute command error: " + err.Error())
}
}
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