public static void EcbRoundtrip(byte[] plaintext, byte[] ciphertext, PaddingMode padding)
{
using (RC2 rc2 = RC2Factory.Create())
{
rc2.Key = s_rc2OneShotKey;
byte[] encrypted = rc2.EncryptEcb(plaintext, padding);
byte[] decrypted = rc2.DecryptEcb(encrypted, padding);
if (padding == PaddingMode.Zeros)
{
Assert.Equal(plaintext, decrypted[..plaintext.Length]);
public static void RC2RoundTrip(CipherMode cipherMode, PaddingMode paddingMode, string key, string iv, string textHex, string expectedDecrypted, string expectedEncrypted)
{
byte[] expectedDecryptedBytes = expectedDecrypted == null?textHex.HexToByteArray() : expectedDecrypted.HexToByteArray();
byte[] expectedEncryptedBytes = expectedEncrypted.HexToByteArray();
byte[] keyBytes = key.HexToByteArray();
using (RC2 alg = RC2Factory.Create())
{
alg.Key = keyBytes;
alg.Padding = paddingMode;
alg.Mode = cipherMode;
if (iv != null)
{
alg.IV = iv.HexToByteArray();
}
byte[] cipher = alg.Encrypt(textHex.HexToByteArray());
Assert.Equal <byte>(expectedEncryptedBytes, cipher);
byte[] decrypted = alg.Decrypt(cipher);
Assert.Equal <byte>(expectedDecryptedBytes, decrypted);
if (RC2Factory.OneShotSupported)
{
byte[] oneShotEncrypt = cipherMode switch
{
CipherMode.ECB => alg.EncryptEcb(textHex.HexToByteArray(), paddingMode),
CipherMode.CBC => alg.EncryptCbc(textHex.HexToByteArray(), iv.HexToByteArray(), paddingMode),
_ => throw new NotImplementedException(),
};
Assert.Equal(expectedEncryptedBytes, oneShotEncrypt);
byte[] oneShotDecrypt = cipherMode switch
{
CipherMode.ECB => alg.DecryptEcb(cipher, paddingMode),
CipherMode.CBC => alg.DecryptCbc(cipher, iv.HexToByteArray(), paddingMode),
_ => throw new NotImplementedException(),
};
Assert.Equal(expectedDecryptedBytes, oneShotDecrypt);
}
}
}