public void Implement_CBC_mode_Test() //CBC = Cipher Block Chaining
{
var BLOCKSIZE = 16;
//https://cryptopals.com/sets/2/challenges/10
string str = Util.GetFile(10);
string Hex = MyConvert.Base64ToHex(str);
var bytes = MyConvert.HexToByteArray(Hex);
//Initialization Vector (padded to BLOCKSIZE bytes)
string IVHex = Pad.PadHex(BLOCKSIZE * 2, "00");
var IVBytes = MyConvert.HexToByteArray(IVHex);
//The Key
string key = "YELLOW SUBMARINE";
string HexKey = MyConvert.HexEncodePlainText(key);
var Keybytes = MyConvert.HexToByteArray(HexKey);
//Perform my version of CBC
var decryptedBytes = MyCrypto.AES_CBC_Decrypt(bytes, Keybytes, IVBytes, BLOCKSIZE);
var HexResult = MyConvert.BytesToHex(decryptedBytes);
var Plain = MyConvert.HexToAscii(HexResult);
Assert.IsTrue("I'm back and I'm ringin' " == Plain.Substring(0, 25)); //25 is at least two blocks (of16) so i know i have the algo correct
}
public void Base64ToHex_Test()
{
string hexstring = "49276d206b696c6c696e6720796f757220627261696e206c696b65206120706f69736f6e6f7573206d757368726f6f6d";
string Base64 = "SSdtIGtpbGxpbmcgeW91ciBicmFpbiBsaWtlIGEgcG9pc29ub3VzIG11c2hyb29t";
string Result = MyConvert.Base64ToHex(Base64);
Assert.IsTrue(hexstring == Result);
}
public void FixedXOR_Test2()
{
//https://cryptopals.com/sets/1/challenges/6
string str = Util.GetFile(6);
string HextoDecrypt = MyConvert.Base64ToHex(str);
var Key = "Terminator X: Bring the noise";
var HexKey = Pad.PadKey(MyConvert.HexEncodePlainText(Key), HextoDecrypt.Length);
var DecryptedHex = MyCrypto.FixedXOR(HextoDecrypt, HexKey);
var Plain = MyConvert.HexToAscii(DecryptedHex);
Assert.IsTrue("I'm back and I'm ringin' " == Plain.Substring(0, 25));
}
public void AESinECB_Test() //ECB = Electronic Codebook
{
//https://cryptopals.com/sets/1/challenges/7
string str = Util.GetFile(7);
string Hex = MyConvert.Base64ToHex(str);
var bytes = MyConvert.HexToByteArray(Hex);
string key = "YELLOW SUBMARINE";
string HexKey = MyConvert.HexEncodePlainText(key);
var Keybytes = MyConvert.HexToByteArray(HexKey);
var result = MyCrypto.AES_ECB_Decrypt(bytes, Keybytes);
var HexResult = MyConvert.BytesToHex(result);
var Plain = MyConvert.HexToAscii(HexResult);
Assert.IsTrue("I'm back and I'm ringin' " == Plain.Substring(0, 25));
}