public static void Challenge2()
{
const string plaintext = "1c0111001f010100061a024b53535009181c";
const string cipher = "686974207468652062756c6c277320657965";
Console.WriteLine(StringConverters.BitsToHex(StringConverters.HexToBits(plaintext).Xor(StringConverters.HexToBits(cipher))));
}
public static void Challenge7()
{
StreamReader sr = new StreamReader(@"C:\Users\User\Documents\Visual Studio 2015\Projects\cryptopals\cryptopals\set 1 challenge 7.txt");
string base64 = "";
string temp = "";
while ((temp = sr.ReadLine()) != null)
{
base64 = base64 + temp;
}
BitArray bits = StringConverters.Base64ToBits(base64);
string hex = StringConverters.BitsToHex(bits);
string keyS = "YELLOW SUBMARINE";
byte[] key = new byte[16];
byte[] iv = new byte[16];
for (int i = 0; i < 16; i++)
{
key[i] = Convert.ToByte(keyS[i]);
iv[i] = Convert.ToByte(0);
}
int[] cText = IntConversion.hexToInts(hex);
byte[] cTextB = new byte[cText.Length];
for (int i = 0; i < cText.Length; i++)
{
cTextB[i] = (byte)cText[i];
}
byte[] pTextB = new byte[cText.Length];
int[] pText = new int[cText.Length];
AesManaged alg = new AesManaged {
KeySize = 128, Key = key, BlockSize = 128, Mode = CipherMode.ECB, Padding = PaddingMode.Zeros, IV = iv
};
ICryptoTransform dec = alg.CreateDecryptor(alg.Key, alg.IV);
dec.TransformBlock(cTextB, 0, cText.Length, pTextB, 0);
for (int i = 0; i < cText.Length; i++)
{
pText[i] = pTextB[i];
}
Console.WriteLine(IntConversion.intsToString(pText));
}
public static void Challenge6()
{
StreamReader sr = new StreamReader(@"C:\Users\User\Documents\Visual Studio 2015\Projects\cryptopals\cryptopals\set 1 challenge 6.txt");
string base64 = "";
string temp = "";
while ((temp = sr.ReadLine()) != null)
{
base64 = base64 + temp;
}
BitArray bits = StringConverters.Base64ToBits(base64);
string hex = StringConverters.BitsToHex(bits);
Console.WriteLine(IntMultiVigenere.crackMV(hex));
}
