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Configurable SSH cipher suite (#913)

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* Configurable SSH cipher suite

* Update configuration file comment

* Add default in settings loading code

* Fix fmt and log messsage

* Remove default from code as this could probably might not be good idea
This commit is contained in:
spacetourist 2017-10-21 14:13:41 +01:00 • committed by Lauris BH
parent 985a39590b
commit 7131c7d40d
4 changed files with 11 additions and 3 deletions
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2
modules/setting/setting.go
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@ -96,6 +96,7 @@ var (
ListenHost string `ini:"SSH_LISTEN_HOST"`
ListenPort int `ini:"SSH_LISTEN_PORT"`
RootPath string `ini:"SSH_ROOT_PATH"`
ServerCiphers []string `ini:"SSH_SERVER_CIPHERS"`
KeyTestPath string `ini:"SSH_KEY_TEST_PATH"`
KeygenPath string `ini:"SSH_KEYGEN_PATH"`
AuthorizedKeysBackup bool `ini:"SSH_AUTHORIZED_KEYS_BACKUP"`
@ -708,6 +709,7 @@ func NewContext() {
SSH.Domain = Domain
}
SSH.RootPath = path.Join(homeDir, ".ssh")
SSH.ServerCiphers = sec.Key("SSH_SERVER_CIPHERS").Strings(",")
SSH.KeyTestPath = os.TempDir()
if err = Cfg.Section("server").MapTo(&SSH); err != nil {
log.Fatal(4, "Failed to map SSH settings: %v", err)

5
modules/ssh/ssh.go
View file

@ -151,8 +151,11 @@ func listen(config *ssh.ServerConfig, host string, port int) {
}
// Listen starts a SSH server listens on given port.
func Listen(host string, port int) {
func Listen(host string, port int, ciphers []string) {
config := &ssh.ServerConfig{
Config: ssh.Config{
Ciphers: ciphers,
},
PublicKeyCallback: func(conn ssh.ConnMetadata, key ssh.PublicKey) (*ssh.Permissions, error) {
pkey, err := models.SearchPublicKeyByContent(strings.TrimSpace(string(ssh.MarshalAuthorizedKey(key))))
if err != nil {