From: Dmitry Belyavskiy <beldmit@gmail.com>
Date: Mon, 4 May 2020 20:01:48 +0000 (+0300)
Subject: Fix coverity issue 300458
X-Git-Tag: v3.0.0~154
X-Git-Url: http://wagner.pp.ru/gitweb/?a=commitdiff_plain;h=d19a1a820d7be62647bbdd7448d851498bf18968;p=openssl-gost%2Fengine.git

Fix coverity issue 300458
---

diff --git a/gost_ec_keyx.c b/gost_ec_keyx.c
index 4a0eb82..2b4a96e 100644
--- a/gost_ec_keyx.c
+++ b/gost_ec_keyx.c
@@ -86,10 +86,15 @@ int VKO_compute_key(unsigned char *shared_key,
         GOSTerr(GOST_F_VKO_COMPUTE_KEY, ERR_R_MALLOC_FAILURE);
         goto err;
     }
-    EVP_MD_CTX_init(mdctx);
-    EVP_DigestInit_ex(mdctx, md, NULL);
-    EVP_DigestUpdate(mdctx, databuf, buf_len);
-    EVP_DigestFinal_ex(mdctx, shared_key, NULL);
+
+    if (EVP_MD_CTX_init(mdctx) == 0
+        || EVP_DigestInit_ex(mdctx, md, NULL) == 0
+        || EVP_DigestUpdate(mdctx, databuf, buf_len) == 0
+        || EVP_DigestFinal_ex(mdctx, shared_key, NULL) == 0) {
+        GOSTerr(GOST_F_VKO_COMPUTE_KEY, ERR_R_EVP_LIB);
+        goto err;
+    }
+
     ret = (EVP_MD_size(md) > 0) ? EVP_MD_size(md) : 0;
 
  err: