upstream: ban empty namespace strings for s

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OpenBSD-Commit-ID: 7c5bcf40bed8f4e826230176f4aa353c52aeb698

1 files changed, 2 insertions, 2 deletions

diff --git a/ssh-keygen.c b/ssh-keygen.c
index 4ec479de7..7a6afa3c4 100644
--- a/ssh-keygen.c
+++ b/ssh-keygen.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh-keygen.c,v 1.352 2019/09/29 16:31:57 jmc Exp $ */
+/* $OpenBSD: ssh-keygen.c,v 1.353 2019/10/02 08:05:50 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -3030,7 +3030,7 @@ main(int argc, char **argv)
         argc -= optind;
 
         if (sign_op != NULL) {
-                if (cert_principals == NULL) {
+                if (cert_principals == NULL && *cert_principals == '\0') {
                         error("Too few arguments for sign/verify: "
                             "missing namespace");
                         exit(1);