- for (j = 0; j < md_size && i < rec->orig_len; i++, j++)
- {
- unsigned char mac_started = constant_time_ge(i, mac_start);
- unsigned char mac_ended = constant_time_ge(i, mac_end);
- unsigned char b = 0;
- b = rec->data[i];
- rotated_mac[j] |= b & mac_started & ~mac_ended;
- }
+ unsigned char mac_started = constant_time_ge(i, mac_start);
+ unsigned char mac_ended = constant_time_ge(i, mac_end);
+ unsigned char b = rec->data[i];
+ rotated_mac[j++] |= b & mac_started & ~mac_ended;
+ j &= constant_time_lt(j,md_size);