- OFF_T i;
- MDstruct MD;
- struct map_struct *buf;
- int fd;
- OFF_T len = size;
- char tmpchunk[CSUM_CHUNK];
-
- memset(sum,0,csum_length);
-
- fd = open(fname,O_RDONLY);
- if (fd == -1) return;
-
- buf = map_file(fd,size);
-
- MDbegin(&MD);
-
- for(i = 0; i + CSUM_CHUNK <= len; i += CSUM_CHUNK) {
- memcpy(tmpchunk, map_ptr(buf,i,CSUM_CHUNK), CSUM_CHUNK);
- MDupdate(&MD, tmpchunk, CSUM_CHUNK*8);
- }
-
- if (len - i > 0) {
- memcpy(tmpchunk, map_ptr(buf,i,len-i), len-i);
- MDupdate(&MD, tmpchunk, (len-i)*8);
- }
-
- sum_put(&MD,sum);
-
- close(fd);
- unmap_file(buf);
+ OFF_T i;
+ struct map_struct *buf;
+ int fd;
+ OFF_T len = size;
+ struct mdfour m;
+
+ memset(sum,0,MD4_SUM_LENGTH);
+
+ fd = do_open(fname, O_RDONLY, 0);
+ if (fd == -1)
+ return;
+
+ buf = map_file(fd, size, CSUM_CHUNK);
+
+ mdfour_begin(&m);
+
+ for(i = 0; i + CSUM_CHUNK <= len; i += CSUM_CHUNK) {
+ mdfour_update(&m, (uchar *)map_ptr(buf, i, CSUM_CHUNK),
+ CSUM_CHUNK);
+ }
+
+ /* Prior to version 27 an incorrect MD4 checksum was computed
+ * by failing to call mdfour_tail() for block sizes that
+ * are multiples of 64. This is fixed by calling mdfour_update()
+ * even when there are no more bytes. */
+ if (len - i > 0 || protocol_version >= 27)
+ mdfour_update(&m, (uchar *)map_ptr(buf, i, len-i), len-i);
+
+ mdfour_result(&m, (uchar *)sum);
+
+ close(fd);
+ unmap_file(buf);