1 files changed, 11 insertions, 1 deletions

diff --git a/src/regress/lib/libcrypto/bn/bn_convert.c b/src/regress/lib/libcrypto/bn/bn_convert.c
index 147bb6839a..69f7da43b1 100644
--- a/src/regress/lib/libcrypto/bn/bn_convert.c
+++ b/src/regress/lib/libcrypto/bn/bn_convert.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: bn_convert.c,v 1.2 2023/05/27 15:50:56 jsing Exp $ */
+/*      $OpenBSD: bn_convert.c,v 1.3 2023/06/23 10:50:47 tb Exp $ */
 /*
  * Copyright (c) 2023 Joel Sing <jsing@openbsd.org>
  *
@@ -214,6 +214,16 @@ test_bn_asc2bn(void)
                 }
         }
 
+        /*
+         * While it makes little sense to call BN_asc2bn() with a NULL bn,
+         * check for consistent behavior.
+         */
+        if (!BN_asc2bn(NULL, "1") || !BN_asc2bn(NULL, "-1") ||
+            !BN_asc2bn(NULL, "0x1") || !BN_asc2bn(NULL, "-0x1")) {
+                fprintf(stderr, "FAIL: BN_asc2bn() with NULL BIGNUM failed\n");
+                goto failure;
+        }
+
         failed = 0;
 
  failure: