From 216ff5a9522536f637c4e12edf458120eb83cfd0 Mon Sep 17 00:00:00 2001
From: Martin Holst Swende <martin@swende.se>
Date: Thu, 21 Nov 2019 11:04:31 +0100
Subject: [PATCH] cmd/puppeth: make ssh prompt more user-friendly

---
 cmd/puppeth/ssh.go | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/cmd/puppeth/ssh.go b/cmd/puppeth/ssh.go
index c50759606..da2862db2 100644
--- a/cmd/puppeth/ssh.go
+++ b/cmd/puppeth/ssh.go
@@ -129,15 +129,20 @@ func dial(server string, pubkey []byte) (*sshClient, error) {
 			fmt.Printf("SSH key fingerprint is %s [MD5]\n", ssh.FingerprintLegacyMD5(key))
 			fmt.Printf("Are you sure you want to continue connecting (yes/no)? ")
 
-			text, err := bufio.NewReader(os.Stdin).ReadString('\n')
-			switch {
-			case err != nil:
-				return err
-			case strings.TrimSpace(text) == "yes":
-				pubkey = key.Marshal()
-				return nil
-			default:
-				return fmt.Errorf("unknown auth choice: %v", text)
+			for {
+				text, err := bufio.NewReader(os.Stdin).ReadString('\n')
+				switch {
+				case err != nil:
+					return err
+				case strings.TrimSpace(text) == "yes":
+					pubkey = key.Marshal()
+					return nil
+				case strings.TrimSpace(text) == "no":
+					return errors.New("users says no")
+				default:
+					fmt.Println("Please answer 'yes' or 'no'")
+					continue
+				}
 			}
 		}
 		// If a public key exists for this SSH server, check that it matches