reset method

@override void reset()

Implementation

@override
void reset() {
  _state[0] = 0x67452301;
  _state[1] = 0xefcdab89;
  _state[2] = 0x98badcfe;
  _state[3] = 0x10325476;
  _bufferPos = 0;
  _totalLength = 0;
}