From: Dr. Stephen Henson <steve@openssl.org>
Date: Wed, 14 Apr 2010 00:30:32 +0000 (+0000)
Subject: check ASN1 type before using it
X-Git-Tag: OpenSSL-fips-2_0-rc1~1132
X-Git-Url: https://git.openssl.org/?p=openssl.git;a=commitdiff_plain;h=af73b08ac09dfa0c548f3eacc00db4c882db1fbe

check ASN1 type before using it
---

diff --git a/engines/ccgost/gost_crypt.c b/engines/ccgost/gost_crypt.c
index eb11f0e328..44f4e49bc9 100644
--- a/engines/ccgost/gost_crypt.c
+++ b/engines/ccgost/gost_crypt.c
@@ -459,13 +459,15 @@ int  gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx,ASN1_TYPE *params)
 	int ret = -1;
 	int len; 
 	GOST_CIPHER_PARAMS *gcp = NULL;
-	unsigned char *p = params->value.sequence->data;
+	unsigned char *p;
 	struct ossl_gost_cipher_ctx *c=ctx->cipher_data;
 	if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE)
 		{
 		return ret;
 		}
 
+	p = params->value.sequence->data;
+
 	gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
 		params->value.sequence->length);