From: se-prok <81800148+se-prok@users.noreply.github.com>
Date: Fri, 2 Apr 2021 07:51:28 +0000 (+0300)
Subject: Update gost_ec_keyx.c
X-Git-Tag: v3.0.0~27
X-Git-Url: http://wagner.pp.ru/gitweb/?a=commitdiff_plain;h=336c30e54ca42f54641ee06c9dce26ecd454b6ea;p=openssl-gost%2Fengine.git

Update gost_ec_keyx.c

It's not right to have segmentation faults.
---

diff --git a/gost_ec_keyx.c b/gost_ec_keyx.c
index eeb0122..40cad2b 100644
--- a/gost_ec_keyx.c
+++ b/gost_ec_keyx.c
@@ -672,6 +672,13 @@ static int pkey_gost2018_decrypt(EVP_PKEY_CTX *pctx, unsigned char *key,
 
    o  q * Q_eph is not equal to zero point.
 */
+    if (eph_key == NULL || priv == NULL || data == NULL) {
+       GOSTerr(GOST_F_PKEY_GOST2018_DECRYPT,
+               GOST_R_ERROR_COMPUTING_EXPORT_KEYS);
+       ret = 0;
+       goto err;
+    }
+  
     if (data->shared_ukm_size == 0 && pst->ukm != NULL) {
         if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_SET_IV,
         ASN1_STRING_length(pst->ukm), (void *)ASN1_STRING_get0_data(pst->ukm)) < 0) {