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 5ba4fc5..0820398 100644 (file)
--- 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;