From: J Mohan Rao Arisankala <mohan@barracuda.com>
Date: Wed, 24 Feb 2016 07:33:10 +0000 (+0530)
Subject: EC_KEY_priv2buf (): check parameter sanity
X-Git-Tag: OpenSSL_1_1_0-pre4~498
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=acae59bb29ddc769743ab4a8ae373b5ff2f42b57;p=oweals%2Fopenssl.git

EC_KEY_priv2buf (): check parameter sanity

In EC_KEY_priv2buf(), check for pbuf sanity.
If invoked with NULL, gracefully returns the key length.

Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
---

diff --git a/crypto/ec/ec_key.c b/crypto/ec/ec_key.c
index c382e7e41e..439cfa27cc 100644
--- a/crypto/ec/ec_key.c
+++ b/crypto/ec/ec_key.c
@@ -583,8 +583,8 @@ size_t EC_KEY_priv2buf(const EC_KEY *eckey, unsigned char **pbuf)
     size_t len;
     unsigned char *buf;
     len = EC_KEY_priv2oct(eckey, NULL, 0);
-    if (len == 0)
-        return 0;
+    if (len == 0 || pbuf == NULL)
+        return len;
     buf = OPENSSL_malloc(len);
     if (buf == NULL)
         return 0;