===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/ssh/sshconnect2.c,v
retrieving revision 1.269
retrieving revision 1.270
diff -u -r1.269 -r1.270
--- src/usr.bin/ssh/sshconnect2.c	2018/03/03 03:01:50	1.269
+++ src/usr.bin/ssh/sshconnect2.c	2018/03/24 19:28:43	1.270
@@ -1,4 +1,4 @@
-/* $OpenBSD: sshconnect2.c,v 1.269 2018/03/03 03:01:50 djm Exp $ */
+/* $OpenBSD: sshconnect2.c,v 1.270 2018/03/24 19:28:43 markus Exp $ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  * Copyright (c) 2008 Damien Miller.  All rights reserved.
@@ -1006,6 +1006,8 @@
 	char *sigtype = NULL;
 	const char *alg = key_sign_encode(key);
 
+	if (sshkey_is_cert(key))
+		return 0;
 	if ((r = sshkey_sigtype(sig, len, &sigtype)) != 0)
 		return r;
 	if (strcmp(sigtype, alg) != 0) {