- int i;
- MDstruct MD;
- static char *buf1;
- static int len1;
-
- if (len > len1) {
- if (buf1) free(buf1);
- buf1 = (char *)malloc(len+4);
- len1 = len;
- if (!buf1) out_of_memory("get_checksum2");
- }
-
- MDbegin(&MD);
-
- bcopy(buf,buf1,len);
- if (checksum_seed) {
- SIVAL(buf1,len,checksum_seed);
- len += 4;
- }
-
- for(i = 0; i + CSUM_CHUNK <= len; i += CSUM_CHUNK) {
- MDupdate(&MD, buf1+i, CSUM_CHUNK*8);
- }
- if (len - i > 0)
- MDupdate(&MD, buf1+i, (len-i)*8);
-
- sum_put(&MD,sum);
+ int32 i;
+ static char *buf1;
+ static int32 len1;
+ struct mdfour m;
+
+ if (len > len1) {
+ if (buf1)
+ free(buf1);
+ buf1 = new_array(char, len+4);
+ len1 = len;
+ if (!buf1)
+ out_of_memory("get_checksum2");
+ }
+
+ mdfour_begin(&m);
+
+ memcpy(buf1,buf,len);
+ if (checksum_seed) {
+ SIVAL(buf1,len,checksum_seed);
+ len += 4;
+ }
+
+ for(i = 0; i + CSUM_CHUNK <= len; i += CSUM_CHUNK) {
+ mdfour_update(&m, (uchar *)(buf1+i), 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 *)(buf1+i), (len-i));
+ }
+
+ mdfour_result(&m, (uchar *)sum);