From: Bodo Möller <bodo@openssl.org>
Date: Fri, 30 Jul 1999 19:22:57 +0000 (+0000)
Subject: by request: let BN_dup(NULL) just return NULL
X-Git-Tag: OpenSSL_0_9_4~45
X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff_plain;h=8d85b33eb53ca9ae739aaa6a6f30cb65a1ac6135

by request: let BN_dup(NULL) just return NULL
---

diff --git a/crypto/bn/bn_lib.c b/crypto/bn/bn_lib.c
index 9c2c9d3238..5d62d88e8b 100644
--- a/crypto/bn/bn_lib.c
+++ b/crypto/bn/bn_lib.c
@@ -489,6 +489,8 @@ BIGNUM *BN_dup(const BIGNUM *a)
 	{
 	BIGNUM *r;
 
+	if (a == NULL) return NULL;
+
 	bn_check_top(a);
 
 	r=BN_new();