From a57bcd50c280fd2c48fd28de93dd94023ebdc980 Mon Sep 17 00:00:00 2001
From: Vitaly Chikunov <vt@altlinux.org>
Date: Tue, 15 Oct 2019 19:22:45 +0300
Subject: [PATCH] gost_ec_keyx: Fix CID 253282 Dereference null return value

`param' is used unconditionally in pkey_GOST_ECcp_encrypt() so we can
unconditionally check (vs in any particular `if' branch) for it's being
non-NULL. This is similar to how pkey_GOST_ECcp_decrypt() works with
`param'.

Closes #174.
---
 gost_ec_keyx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gost_ec_keyx.c b/gost_ec_keyx.c
index fa068ae..963cd8a 100644
--- a/gost_ec_keyx.c
+++ b/gost_ec_keyx.c
@@ -263,6 +263,8 @@ static int pkey_GOST_ECcp_encrypt(EVP_PKEY_CTX *pctx, unsigned char *out,
             return 0;
         }
     }
+    if (!param)
+        goto err;
     /* Check for private key in the peer_key of context */
     if (sec_key) {
         key_is_ephemeral = 0;
-- 
2.39.2