From: dmitry dulesov <dmitry.dulesov@gmail.com>
Date: Thu, 30 Jan 2020 00:50:54 +0000 (+0300)
Subject: gosthash2012: Simplify `pad'
X-Git-Tag: v3.0.0~221
X-Git-Url: http://www.wagner.pp.ru/gitweb/?p=openssl-gost%2Fengine.git;a=commitdiff_plain;h=11777554bd63b16bb13aa3b7358d8e7809f17523

gosthash2012: Simplify `pad'

`pad' does not need this complicated  memory movements using stack
buffer.

Committed-by: Vitaly Chikunov <vt@altlinux.org>
---

diff --git a/gosthash2012.c b/gosthash2012.c
index 0233d0a..201fe31 100644
--- a/gosthash2012.c
+++ b/gosthash2012.c
@@ -48,13 +48,9 @@ void init_gost2012_hash_ctx(gost2012_hash_ctx * CTX,
 
 static INLINE void pad(gost2012_hash_ctx * CTX)
 {
-    unsigned char buf[64];
+    memset(&(CTX->buffer[CTX->bufsize]), 0, sizeof(CTX->buffer) - CTX->bufsize);
+    CTX->buffer[CTX->bufsize] = 1;
 
-    memset(&buf, 0x00, sizeof buf);
-    memcpy(&buf, CTX->buffer, CTX->bufsize);
-
-    buf[CTX->bufsize] = 0x01;
-    memcpy(CTX->buffer, &buf, sizeof buf);
 }
 
 static INLINE void add512(const union uint512_u *x,