From 65bbc172d87008cfbfd79e7f748195b3c5d1fc9b Mon Sep 17 00:00:00 2001
From: Boshi Lian <farmer1992@gmail.com>
Date: Tue, 13 Feb 2018 17:09:16 +0800
Subject: [PATCH] fallback to none when public key failed

---
 sshpiperd/workingdir.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sshpiperd/workingdir.go b/sshpiperd/workingdir.go
index 1326e7d2..26cf95e7 100644
--- a/sshpiperd/workingdir.go
+++ b/sshpiperd/workingdir.go
@@ -157,8 +157,9 @@ func findUpstreamFromUserfile(conn ssh.ConnMetadata) (net.Conn, *ssh.SSHPiperAut
 		PublicKeyCallback: func(conn ssh.ConnMetadata, key ssh.PublicKey) (ssh.AuthPipeType, ssh.AuthMethod, error) {
 			signer, err := mapPublicKeyFromUserfile(conn, key)
 
-			if err != nil {
-				return ssh.AuthPipeTypeDiscard, nil, err
+			if err != nil || signer == nil {
+				// try one
+				return ssh.AuthPipeTypeNone, nil, nil
 			}
 
 			return ssh.AuthPipeTypeMap, ssh.PublicKeys(signer), nil