private static void TestTripleDESTransformDirectKey(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
byte[] iv,
byte[] plainBytes,
byte[] cipherBytes,
int?feedbackSize = default)
{
byte[] liveEncryptBytes;
byte[] liveDecryptBytes;
byte[] liveOneShotDecryptBytes = null;
byte[] liveOneShotEncryptBytes = null;
using (TripleDES tdes = TripleDESFactory.Create())
{
tdes.Mode = cipherMode;
tdes.Padding = paddingMode;
tdes.Key = key;
if (feedbackSize.HasValue)
{
tdes.FeedbackSize = feedbackSize.Value;
}
liveEncryptBytes = TripleDESEncryptDirectKey(tdes, key, iv, plainBytes);
liveDecryptBytes = TripleDESDecryptDirectKey(tdes, key, iv, cipherBytes);
if (cipherMode == CipherMode.ECB)
{
liveOneShotDecryptBytes = tdes.DecryptEcb(cipherBytes, paddingMode);
liveOneShotEncryptBytes = tdes.EncryptEcb(plainBytes, paddingMode);
}
else if (cipherMode == CipherMode.CBC)
{
liveOneShotDecryptBytes = tdes.DecryptCbc(cipherBytes, iv, paddingMode);
liveOneShotEncryptBytes = tdes.EncryptCbc(plainBytes, iv, paddingMode);
}
else if (cipherMode == CipherMode.CFB)
{
liveOneShotDecryptBytes = tdes.DecryptCfb(cipherBytes, iv, paddingMode, feedbackSizeInBits: feedbackSize.Value);
liveOneShotEncryptBytes = tdes.EncryptCfb(plainBytes, iv, paddingMode, feedbackSizeInBits: feedbackSize.Value);
}
if (liveOneShotDecryptBytes is not null)
{
Assert.Equal(plainBytes, liveOneShotDecryptBytes);
}
if (liveOneShotEncryptBytes is not null)
{
Assert.Equal(cipherBytes, liveOneShotEncryptBytes);
}
}
Assert.Equal(cipherBytes, liveEncryptBytes);
Assert.Equal(plainBytes, liveDecryptBytes);
}
public static void EcbRoundtrip(byte[] plaintext, byte[] ciphertext, PaddingMode padding)
{
using (TripleDES tdes = TripleDESFactory.Create())
{
tdes.Key = s_tdes192OneShotKey;
// Even though we have set the instance to use CFB, the Ecb one shots should
// always be done in ECB.
tdes.FeedbackSize = 8;
tdes.Mode = CipherMode.CFB;
tdes.Padding = padding == PaddingMode.None ? PaddingMode.PKCS7 : PaddingMode.None;
byte[] encrypted = tdes.EncryptEcb(plaintext, padding);
byte[] decrypted = tdes.DecryptEcb(encrypted, padding);
if (padding == PaddingMode.Zeros)
{
Assert.Equal(plaintext, decrypted[..plaintext.Length]);
