convert method

@override HashDigest convert(List<int> password)

Generate a derived key from a password

Implementation

@override
HashDigest convert(List<int> password) {
  int i, j, k, t;
  Uint8List hash, block;
  var result = Uint8List(derivedKeyLength);

  // Initialize the MAC with provided password
  var sink = algo.by(password).createSink();

  k = 0;
  for (i = 1; k < derivedKeyLength; i++) {
    // Generate the first HMAC: U_1
    sink.reset();
    sink.add(salt);
    sink.add([i >>> 24, i >>> 16, i >>> 8, i]);
    hash = sink.digest().bytes;

    // For storing the combined XORs
    block = hash;

    // Subsequence HMAC generation: U_2 .. U_c
    for (t = 1; t < iterations; ++t) {
      sink.reset();
      sink.add(hash);
      hash = sink.digest().bytes;

      for (j = 0; j < hash.length; ++j) {
        block[j] ^= hash[j];
      }
    }

    // Append the hash to the result
    for (j = 0; j < hash.length && k < derivedKeyLength; ++j, ++k) {
      result[k] = block[j];
    }
  }

  return HashDigest(result);
}