blake2bWithKey method
Implementation
blake2bWithKey(final Uint8List key) {
assert(key.length <= 64);
this._buffer = Uint8List(Const.blockLengthBytes);
this._key!.addAll(key);
this._keyLength = key.length;
this._buffer.addAll(key);
this._bufferPos = Const.blockLengthBytes; // zero padding
_digestSize = 64;
init();
}