Check GOST parameters are not NULL (CVE-2012-0027)

2 files changed, 8 insertions, 0 deletions

diff --git a/engines/ccgost/gost2001_keyx.c b/engines/ccgost/gost2001_keyx.c
index 00759bcab0..c748102857 100644
--- a/engines/ccgost/gost2001_keyx.c
+++ b/engines/ccgost/gost2001_keyx.c
@@ -280,6 +280,10 @@ int pkey_GOST01cp_decrypt(EVP_PKEY_CTX *pctx, unsigned char *key, size_t * key_l
 		}
 		
 	param = get_encryption_params(gkt->key_agreement_info->cipher);
+    if(!param){
+        goto err;
+    }
+
 	gost_init(&ctx,param->sblock);	
 	OPENSSL_assert(gkt->key_agreement_info->eph_iv->length==8);
 	memcpy(wrappedKey,gkt->key_agreement_info->eph_iv->data,8);
diff --git a/engines/ccgost/gost94_keyx.c b/engines/ccgost/gost94_keyx.c
index 624be586a5..0d7d3ffe6a 100644
--- a/engines/ccgost/gost94_keyx.c
+++ b/engines/ccgost/gost94_keyx.c
@@ -261,6 +261,10 @@ int pkey_GOST94cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *key_len
 		}
 
 	param = get_encryption_params(gkt->key_agreement_info->cipher);
+    if(!param){
+        goto err;
+    }
+	
 	gost_init(&cctx,param->sblock);	
 	OPENSSL_assert(gkt->key_agreement_info->eph_iv->length==8);
 	memcpy(wrappedKey,gkt->key_agreement_info->eph_iv->data,8);