public string EncryptionOracle()
{
PlainText message = new PlainText(RandomizeMessageLength(_plainText));
string randKey = GetRandomKey(16).ToASCIIString();
Random random = new Random();
Mode = (random.Next(2) == 0) ? CipherMode.ECB : CipherMode.CBC;
AESCipher aes = new AESCipher(Mode, PaddingMode.PKCS7);
return(aes.Encrypt(message, randKey, CipherTextFormat.HEXADECIMAL));
}
static void Main(string[] args)
{
if (!ParseInput(args))
{
return;
}
if (Params.verbose)
{
System.Console.WriteLine(Params.decrypt ? "Running in decryption mode." : "Running in endryption mode.");
System.Console.WriteLine(Params.useCBC ? "Using CBC." : "Using ECB.");
System.Console.WriteLine(Params.usePadding ? "Using PKCS5 padding." : "Not using padding. (Will fail if text length is not mod 16 byte.)");
System.Console.WriteLine("Key: ({0})", Params.key);
System.Console.WriteLine(BytesToFormatedString(Encoding.UTF8.GetBytes(Params.key)));
System.Console.WriteLine();
System.Console.WriteLine("Text: '{0}'", Params.text);
System.Console.WriteLine(BytesToFormatedString(Encoding.UTF8.GetBytes(Params.text)));
System.Console.WriteLine();
}
var cipher = new AESCipher(
new AESParameters(
Encoding.UTF8.GetBytes(Params.key),
Params.keySize,
Params.useCBC,
Params.usePadding,
Params.useKeyPadding,
Encoding.UTF8.GetBytes(Params.initVector),
Params.verbose
)
);
byte[] result;
if (Params.decrypt)
{
result = cipher.Decrypt(Convert.FromBase64String(Params.text));
}
else
{
result = cipher.Encrypt(Encoding.UTF8.GetBytes(Params.text));
}
if (Params.hex)
{
if (Params.useLabels || Params.verbose)
{
System.Console.WriteLine("Result (Hex):");
}
System.Console.WriteLine(BytesToFormatedString(result));
}
if (Params.base64)
{
if (Params.useLabels || Params.verbose)
{
System.Console.WriteLine("Result (base64):");
}
System.Console.WriteLine(Convert.ToBase64String(result));
}
if (Params.decrypt)
{
if (Params.useLabels || Params.verbose)
{
System.Console.WriteLine("Result (utf-8):");
}
System.Console.WriteLine(Encoding.UTF8.GetString(result));
}
}