Mirror fix on add ssh key

conf/locale/locale_en-US.ini

@@ -159,6 +159,7 @@ user_not_exist = Given user does not exist.
 last_org_owner = The user to remove is the last member in owner team. There must be another owner.
 
 invalid_ssh_key = Sorry, we're not able to verify your SSH key: %s
+unable_verify_ssh_key = Gogs cannot verify your SSH key, but we assume that is valid, please make sure yourself.
 auth_failed = Authentication failed: %v
 
 still_own_repo = Your account still have ownership of repository, you have to delete or transfer them first.

conf/locale/locale_zh-CN.ini

@@ -159,6 +159,7 @@ user_not_exist = 被操作的用户不存在！
 last_org_owner = 被移除用户为最后一位管理员。请添加一位新的管理员再进行移除成员操作！
 
 invalid_ssh_key = 很抱歉，我们无法验证您输入的 SSH 密钥：%s
+unable_verify_ssh_key = Gogs 无法验证您输入的 SSH 密钥，但我们假设那是有效的密钥，请您自行确保其有效性！
 auth_failed = 授权验证失败：%v
 
 still_own_repo = 您的帐户仍然是某些仓库的拥有者，您必须先转移或删除它们才能执行删除帐户操作！

models/publickey.go

@@ -33,6 +33,7 @@ const (
 var (
 	ErrKeyAlreadyExist = errors.New("Public key already exist")
 	ErrKeyNotExist     = errors.New("Public key does not exist")
+	ErrKeyUnableVerify = errors.New("Unable to verify public key")
 )
 
 var sshOpLocker = sync.Mutex{}
@@ -134,9 +135,10 @@ func CheckPublicKeyString(content string) (bool, error) {
 		return true, nil
 	}
 
+	fmt.Println(stdout)
 	sshKeygenOutput := strings.Split(stdout, " ")
 	if len(sshKeygenOutput) < 4 {
-		return false, fmt.Errorf("not enough fields returned by ssh-keygen -l -f: %v", sshKeygenOutput)
+		return false, ErrKeyUnableVerify
 	}
 
 	// Check if key type and key size match.

routers/user/setting.go

@@ -177,9 +177,13 @@ func SettingsSSHKeysPost(ctx *middleware.Context, form auth.AddSSHKeyForm) {
 		cleanContent := strings.Replace(form.Content, "\n", "", -1)
 
 		if ok, err := models.CheckPublicKeyString(cleanContent); !ok {
-			ctx.Flash.Error(ctx.Tr("form.invalid_ssh_key", err.Error()))
-			ctx.Redirect(setting.AppSubUrl + "/user/settings/ssh")
-			return
+			if err == models.ErrKeyUnableVerify {
+				ctx.Flash.Info(ctx.Tr("form.unable_verify_ssh_key"))
+			} else {
+				ctx.Flash.Error(ctx.Tr("form.invalid_ssh_key", err.Error()))
+				ctx.Redirect(setting.AppSubUrl + "/user/settings/ssh")
+				return
+			}
 		}
 
 		k := &models.PublicKey{