From: Matt Caswell <matt@openssl.org>
Date: Thu, 4 Jun 2015 10:16:16 +0000 (+0100)
Subject: Clean premaster_secret for GOST
X-Git-Tag: OpenSSL_1_0_2b~30
X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff_plain;h=efd89aa9cc7ed1142be8a4baa49567170bc4626e

Clean premaster_secret for GOST

Ensure OPENSSL_cleanse() is called on the premaster secret value calculated for GOST.

With thanks to the Open Crypto Audit Project for reporting this issue.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit b7ee4815f2452c854cc859e8dda88f2673cdddea)

Conflicts:
	ssl/s3_srvr.c
---

diff --git a/ssl/s3_srvr.c b/ssl/s3_srvr.c
index de984c85d3..8885694c02 100644
--- a/ssl/s3_srvr.c
+++ b/ssl/s3_srvr.c
@@ -2902,6 +2902,7 @@ int ssl3_get_client_key_exchange(SSL *s)
                                                         s->
                                                         session->master_key,
                                                         premaster_secret, 32);
+        OPENSSL_cleanse(premaster_secret, sizeof(premaster_secret));
         /* Check if pubkey from client certificate was used */
         if (EVP_PKEY_CTX_ctrl
             (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)