From dc7e3e55b85998349221a6fe7db2edc9ab811c44 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Wed, 31 Mar 1993 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1993-03-31

---
 boot/userpasswd.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/boot/userpasswd.c b/boot/userpasswd.c
index f2b26ff8f42b1d239a173b6e4bdb2108bfb8e77a..08f88578d9b75d36f34eab9332d18c2553350632 100644
--- a/boot/userpasswd.c
+++ b/boot/userpasswd.c
@@ -34,6 +34,14 @@ userpasswd(int islocal, Method *mp)
 		msg = checkkey(mp, username, hostkey);
 		if(msg == 0)
 			break;
+		/* try the old key algorithm till everyone has switched */
+		opasstokey(hostkey, password);
+		msg = checkkey(mp, username, hostkey);
+		if(msg == 0){
+			print("You have an old style key.  Once you are up, please run 'aux/passwd'\n");
+			print("and retype your key to convert.\n");
+			break;
+		}
 		fprint(2, "?%s\n", msg);
 		outin("user", username, sizeof(username));
 	}