Create AuthorizedKeysCommand (#5236)

This commit is contained in:
zeripath 2018-11-01 13:41:07 +00:00 committed by techknowlogick
parent 00533d3870
commit 7d9a191a3c
7 changed files with 136 additions and 19 deletions

View file

@ -27,10 +27,14 @@ func argsSet(c *cli.Context, args ...string) error {
}
func initDB() error {
return initDBDisableConsole(false)
}
func initDBDisableConsole(disableConsole bool) error {
setting.NewContext()
models.LoadConfigs()
setting.NewXORMLogService(false)
setting.NewXORMLogService(disableConsole)
if err := models.SetEngine(); err != nil {
return fmt.Errorf("models.SetEngine: %v", err)
}

85
cmd/keys.go Normal file
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@ -0,0 +1,85 @@
// Copyright 2018 The Gitea 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 (
"errors"
"fmt"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/setting"
"github.com/urfave/cli"
)
// CmdKeys represents the available keys sub-command
var CmdKeys = cli.Command{
Name: "keys",
Usage: "This command queries the Gitea database to get the authorized command for a given ssh key fingerprint",
Action: runKeys,
Flags: []cli.Flag{
cli.StringFlag{
Name: "expected, e",
Value: "git",
Usage: "Expected user for whom provide key commands",
},
cli.StringFlag{
Name: "username, u",
Value: "",
Usage: "Username trying to log in by SSH",
},
cli.StringFlag{
Name: "type, t",
Value: "",
Usage: "Type of the SSH key provided to the SSH Server (requires content to be provided too)",
},
cli.StringFlag{
Name: "content, k",
Value: "",
Usage: "Base64 encoded content of the SSH key provided to the SSH Server (requires type to be provided too)",
},
cli.StringFlag{
Name: "config, c",
Value: "custom/conf/app.ini",
Usage: "Custom configuration file path",
},
},
}
func runKeys(c *cli.Context) error {
if c.IsSet("config") {
setting.CustomConf = c.String("config")
}
if !c.IsSet("username") {
return errors.New("No username provided")
}
// Check username matches the expected username
if strings.TrimSpace(c.String("username")) != strings.TrimSpace(c.String("expected")) {
return nil
}
content := ""
if c.IsSet("type") && c.IsSet("content") {
content = fmt.Sprintf("%s %s", strings.TrimSpace(c.String("type")), strings.TrimSpace(c.String("content")))
}
if content == "" {
return errors.New("No key type and content provided")
}
if err := initDBDisableConsole(true); err != nil {
return err
}
publicKey, err := models.SearchPublicKeyByContent(content)
if err != nil {
return err
}
fmt.Println(publicKey.AuthorizedString())
return nil
}

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@ -154,6 +154,9 @@ SSH_PORT = 22
SSH_LISTEN_PORT = %(SSH_PORT)s
; Root path of SSH directory, default is '~/.ssh', but you have to use '/home/git/.ssh'.
SSH_ROOT_PATH =
; Gitea will create a authorized_keys file by default when it is not using the internal ssh server
; If you intend to use the AuthorizedKeysCommand functionality then you should turn this off.
SSH_CREATE_AUTHORIZED_KEYS_FILE = true
; For the built-in SSH server, choose the ciphers to support for SSH connections,
; for system SSH this setting has no effect
SSH_SERVER_CIPHERS = aes128-ctr, aes192-ctr, aes256-ctr, aes128-gcm@openssh.com, arcfour256, arcfour128

View file

@ -163,3 +163,24 @@ for automatic deployments.
- `gitea generate secret INTERNAL_TOKEN`
- `gitea generate secret LFS_JWT_SECRET`
- `gitea generate secret SECRET_KEY`
#### keys
Provides an SSHD AuthorizedKeysCommand. Needs to be configured in the sshd config file:
```ini
...
# The value of -e and the AuthorizedKeysCommandUser should match the
# username running gitea
AuthorizedKeysCommandUser git
AuthorizedKeysCommand /path/to/gitea keys -e git -u %u -t %t -k %k
```
The command will return the appropriate authorized_keys line for the
provided key. You should also set the value
`SSH_CREATE_AUTHORIZED_KEYS_FILE=false` in the `[server]` section of
`app.ini`.
NB: opensshd requires the gitea program to be owned by root and not
writable by group or others. The program must be specified by an absolute
path.

View file

@ -13,6 +13,7 @@ import (
"code.gitea.io/gitea/cmd"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
// register supported doc types
_ "code.gitea.io/gitea/modules/markup/csv"
_ "code.gitea.io/gitea/modules/markup/markdown"
@ -48,6 +49,7 @@ arguments - which can alternatively be run by running the subcommand web.`
cmd.CmdAdmin,
cmd.CmdGenerate,
cmd.CmdMigrate,
cmd.CmdKeys,
}
app.Flags = append(app.Flags, cmd.CmdWeb.Flags...)
app.Action = cmd.CmdWeb.Action

View file

@ -558,7 +558,7 @@ func DeletePublicKey(doer *User, id int64) (err error) {
// outside any session scope independently.
func RewriteAllPublicKeys() error {
//Don't rewrite key if internal server
if setting.SSH.StartBuiltinServer {
if setting.SSH.StartBuiltinServer || !setting.SSH.CreateAuthorizedKeysFile {
return nil
}

View file

@ -134,6 +134,7 @@ var (
AuthorizedKeysBackup bool `ini:"SSH_AUTHORIZED_KEYS_BACKUP"`
MinimumKeySizeCheck bool `ini:"-"`
MinimumKeySizes map[string]int `ini:"-"`
CreateAuthorizedKeysFile bool `ini:"SSH_CREATE_AUTHORIZED_KEYS_FILE"`
ExposeAnonymous bool `ini:"SSH_EXPOSE_ANONYMOUS"`
}{
Disabled: false,
@ -863,6 +864,7 @@ func NewContext() {
}
}
SSH.AuthorizedKeysBackup = sec.Key("SSH_AUTHORIZED_KEYS_BACKUP").MustBool(true)
SSH.CreateAuthorizedKeysFile = sec.Key("SSH_CREATE_AUTHORIZED_KEYS_FILE").MustBool(true)
SSH.ExposeAnonymous = sec.Key("SSH_EXPOSE_ANONYMOUS").MustBool(false)
sec = Cfg.Section("server")