1 files changed, 6 insertions, 4 deletions

diff --git a/auth-rsa.c b/auth-rsa.c
index 8c43458b0..69f9a5896 100644
--- a/auth-rsa.c
+++ b/auth-rsa.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: auth-rsa.c,v 1.71 2006/08/03 03:34:41 deraadt Exp $ */
+/* $OpenBSD: auth-rsa.c,v 1.72 2006/11/06 21:25:27 markus Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -76,10 +76,12 @@ auth_rsa_generate_challenge(Key *key)
         if ((challenge = BN_new()) == NULL)
                 fatal("auth_rsa_generate_challenge: BN_new() failed");
         /* Generate a random challenge. */
-        BN_rand(challenge, 256, 0, 0);
+        if (BN_rand(challenge, 256, 0, 0) == 0)
+                fatal("auth_rsa_generate_challenge: BN_rand failed");
         if ((ctx = BN_CTX_new()) == NULL)
-                fatal("auth_rsa_generate_challenge: BN_CTX_new() failed");
-        BN_mod(challenge, challenge, key->rsa->n, ctx);
+                fatal("auth_rsa_generate_challenge: BN_CTX_new failed");
+        if (BN_mod(challenge, challenge, key->rsa->n, ctx) == 0)
+                fatal("auth_rsa_generate_challenge: BN_mod failed");
         BN_CTX_free(ctx);
 
         return challenge;