Fix PPC SHA1 routine for large input buffers

paulusmack · Junio C Hamano · commit b47f509ba59d · 2006-06-18T20:12:20.000-07:00
The PPC SHA1 routine had an overflow which meant that it gave
incorrect results for input buffers &gt;= 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 &lt;paulus@samba.org&gt;
Signed-off-by: Junio C Hamano &lt;junkio@cox.net&gt;
diff --git 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;
