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-rw-r--r--libglusterfs/src/checksum.c34
1 files changed, 15 insertions, 19 deletions
diff --git a/libglusterfs/src/checksum.c b/libglusterfs/src/checksum.c
index cea7822..7575b2f 100644
--- a/libglusterfs/src/checksum.c
+++ b/libglusterfs/src/checksum.c
@@ -17,12 +17,10 @@
<http://www.gnu.org/licenses/>.
*/
-#include <inttypes.h>
+#include <openssl/md5.h>
+#include <stdint.h>
#include "glusterfs.h"
-#include "md5.h"
-#include "checksum.h"
-
/*
* The "weak" checksum required for the rsync algorithm,
@@ -31,22 +29,26 @@
*
* "a simple 32 bit checksum that can be upadted from either end
* (inspired by Mark Adler's Adler-32 checksum)"
+ *
+ * Note: these functions are only called to compute checksums on
+ * pathnames; they don't need to handle arbitrarily long strings of
+ * data. Thus int32_t and uint32_t are sufficient
*/
uint32_t
-gf_rsync_weak_checksum (char *buf1, int32_t len)
+gf_rsync_weak_checksum (unsigned char *buf, size_t len)
{
- int32_t i;
+ int32_t i = 0;
uint32_t s1, s2;
- signed char *buf = (signed char *) buf1;
uint32_t csum;
s1 = s2 = 0;
- for (i = 0; i < (len-4); i+=4) {
- s2 += 4*(s1 + buf[i]) + 3*buf[i+1] + 2*buf[i+2] + buf[i+3];
-
- s1 += buf[i+0] + buf[i+1] + buf[i+2] + buf[i+3];
+ if (len >= 4) {
+ for (; i < (len-4); i+=4) {
+ s2 += 4*(s1 + buf[i]) + 3*buf[i+1] + 2*buf[i+2] + buf[i+3];
+ s1 += buf[i+0] + buf[i+1] + buf[i+2] + buf[i+3];
+ }
}
for (; i < len; i++) {
@@ -66,13 +68,7 @@ gf_rsync_weak_checksum (char *buf1, int32_t len)
*/
void
-gf_rsync_strong_checksum (char *buf, int32_t len, uint8_t *sum)
+gf_rsync_strong_checksum (unsigned char *data, size_t len, unsigned char *md5)
{
- md_context m;
-
- md5_begin (&m);
- md5_update (&m, (unsigned char *) buf, len);
- md5_result (&m, (unsigned char *) sum);
-
- return;
+ MD5(data, len, md5);
}