1 files changed, 6 insertions, 1 deletions

diff --git a/ssh-rsa.c b/ssh-rsa.c
index aab9168eb..e53af9e0a 100644
--- a/ssh-rsa.c
+++ b/ssh-rsa.c
@@ -23,7 +23,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: ssh-rsa.c,v 1.3 2001/01/06 11:23:27 markus Exp $");
+RCSID("$OpenBSD: ssh-rsa.c,v 1.4 2001/01/16 19:20:06 markus Exp $");
 
 #include "ssh.h"
 #include "xmalloc.h"
@@ -122,6 +122,11 @@ ssh_rsa_verify(
                 error("ssh_rsa_verify: no RSA key");
                 return -1;
         }
+        if (BN_num_bits(key->rsa->n) < 768) {
+                error("ssh_rsa_verify: n too small: %d bits",
+                    BN_num_bits(key->rsa->n));
+                return -1;
+        }
         buffer_init(&b);
         buffer_append(&b, (char *) signature, signaturelen);
         ktype = buffer_get_string(&b, NULL);