processBlock method
Implementation
@override
int processBlock(List<int> M, int offset) {
final DESEngine des1 = DESEngine();
final DESEngine des2 = DESEngine();
final DESEngine des3 = DESEngine();
if (forEncryption) {
des1.init(true, key!.sublist(0, 2));
des1.processBlock(M, offset);
des2.init(false, key!.sublist(2, 4));
des2.processBlock(M, offset);
des3.init(true, key!.sublist(4, 6));
des3.processBlock(M, offset);
} else {
des3.init(false, key!.sublist(4, 6));
des3.processBlock(M, offset);
des2.init(true, key!.sublist(2, 4));
des2.processBlock(M, offset);
des1.init(false, key!.sublist(0, 2));
des1.processBlock(M, offset);
}
return blockSize;
}