Add compat flag to allow proper seed checksum order.

[rsync.git] / checksum.c

diff --git a/checksum.c b/checksum.c
index a1c2aa2447d6c2648e4112bed92e1192b6e2bb16..933b514b39207788f88aa3d50b36bbd5419e461a 100644 (file)
--- a/checksum.c
+++ b/checksum.c
@@ -23,6 +23,7 @@
 
 extern int checksum_seed;
 extern int protocol_version;
+extern int proper_seed_order;
 
 /*
   a simple 32 bit checksum that can be upadted from either end
@@ -54,10 +55,18 @@ void get_checksum2(char *buf, int32 len, char *sum)
        if (protocol_version >= 30) {
                uchar seedbuf[4];
                md5_begin(&m);
-               md5_update(&m, (uchar *)buf, len);
-               if (checksum_seed) {
-                       SIVALu(seedbuf, 0, checksum_seed);
-                       md5_update(&m, seedbuf, 4);
+               if (proper_seed_order) {
+                       if (checksum_seed) {
+                               SIVALu(seedbuf, 0, checksum_seed);
+                               md5_update(&m, seedbuf, 4);
+                       }
+                       md5_update(&m, (uchar *)buf, len);
+               } else {
+                       md5_update(&m, (uchar *)buf, len);
+                       if (checksum_seed) {
+                               SIVALu(seedbuf, 0, checksum_seed);
+                               md5_update(&m, seedbuf, 4);
+                       }
                }
                md5_result(&m, (uchar *)sum);
        } else {