From: Paul Mackerras <paulus@samba.org>
Date: Sun, 18 Jun 2006 23:25:16 +0000 (+1000)
Subject: Fix PPC SHA1 routine for large input buffers
X-Git-Tag: v1.4.1-rc1~3^2~13
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=b47f509ba59df5bd9a780745ca710272c6dd175b;p=git.git

Fix PPC SHA1 routine for large input buffers

The PPC SHA1 routine had an overflow which meant that it gave
incorrect results for input buffers >= 512MB.  This fixes it by
ensuring that the update of the total length in bits is done using
64-bit arithmetic.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
---

diff --git a/ppc/sha1.c b/ppc/sha1.c
index 5ba4fc525..0820398b0 100644
--- a/ppc/sha1.c
+++ b/ppc/sha1.c
@@ -30,7 +30,7 @@ int SHA1_Update(SHA_CTX *c, const void *ptr, unsigned long n)
 	unsigned long nb;
 	const unsigned char *p = ptr;
 
-	c->len += n << 3;
+	c->len += (uint64_t) n << 3;
 	while (n != 0) {
 		if (c->cnt || n < 64) {
 			nb = 64 - c->cnt;