encryptBlock method
Implementation
Uint8List encryptBlock(final Uint8List block) {
if (block.length % blockSize != 0) {
throw ArgumentError.value(block, "block size should be $blockSize bytes");
}
_bc.init(true, _key);
final wblock = _bytesToDWordList(block);
_processBlock(wblock);
return _dwordListToBytes(wblock);
}