From: Dmitry Belyavskiy <beldmit@gmail.com>
Date: Fri, 15 Jun 2018 10:30:47 +0000 (+0300)
Subject: Missing initialization
X-Git-Tag: v3.0.0~412^2~8
X-Git-Url: http://wagner.pp.ru/gitweb/?a=commitdiff_plain;h=920ae61478fa9fc91068910254ca130637ce045a;p=openssl-gost%2Fengine.git

Missing initialization
---

diff --git a/gost_omac.c b/gost_omac.c
index ad96662..23872bc 100644
--- a/gost_omac.c
+++ b/gost_omac.c
@@ -133,7 +133,23 @@ int omac_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
     case EVP_MD_CTRL_SET_KEY:
 				{
 					OMAC_CTX *c = EVP_MD_CTX_md_data(ctx);
-					const EVP_CIPHER *cipher = EVP_get_cipherbynid(c->cipher_nid);
+					const EVP_MD *md = EVP_MD_CTX_md(ctx);
+					const EVP_CIPHER *cipher = NULL;
+
+					if (c->cipher_nid == NID_undef)
+					{
+						switch (EVP_MD_nid(md))
+						{
+							case NID_magma_mac:
+								c->cipher_nid = NID_magma_cbc;
+								break;
+
+							case NID_grasshopper_mac:
+								c->cipher_nid = NID_grasshopper_cbc;
+								break;
+						}
+					}
+					cipher = EVP_get_cipherbynid(c->cipher_nid);
 
 					if (cipher == NULL)
 					{