public Encrypt ( System.UInt64 plainText, System.UInt64 cipherText ) : void | ||
plainText | System.UInt64 | |
cipherText | System.UInt64 | |
Résultat | void |
internal void Update(UInt64[] message, Tweak tweak) { // // Takes encoded tweak value and message, encrypts using current state as key and XORs // result with message. The block size is determined by looking at input message length // TODO: Reuse block cipher instance // if (_Hi.Length != message.Length){ throw new InvalidOperationException("Can't change block size in mid flight"); } Threefish threeFish = new Threefish(_Hi, tweak, _blockSize); threeFish.Encrypt(message, _Hi); for (int i = 0; i < _Hi.Length; i++){ _Hi[i] ^= message[i]; } }
static bool ThreefishTest(string hexKey, string hexTweak, string hexMessage, string hexExpectedCipherText, Threefish.ThreeFishBlockSize blockSize) { UInt64[] plainText = Util.ConvertLSBFirstToUInt64(Util.ByteArrayfromHex(hexMessage)); UInt64[] key = Util.ConvertLSBFirstToUInt64(Util.ByteArrayfromHex(hexKey)); UInt64[] tweak = Util.ConvertLSBFirstToUInt64(Util.ByteArrayfromHex(hexTweak)); UInt64[] cipherText = new UInt64[plainText.Length]; Threefish threefish = new Threefish(key, new Tweak { low64 = tweak[0], high64 = tweak[1] }, blockSize); threefish.Encrypt(plainText, cipherText); string hexObtainedCipherText = Util.HexStringFromByteArray(Util.ConvertUInt64ToLSBFirst(cipherText)); if (String.Compare(hexObtainedCipherText.ToLower(), hexExpectedCipherText.ToLower(), true) != 0) { System.Diagnostics.Debugger.Break(); Console.WriteLine("\n\n!!!Test failed!!!"); Console.WriteLine(" \n Key: {0} \n Tweak: {1} \n Message: {2} \n ExpectedCipher: {3}\n GotCipher: {4}", hexKey, hexTweak, hexMessage, hexExpectedCipherText, hexObtainedCipherText); return false; } return true; }