public void EncryptAndDecryptPaddingZeros()
{
Action <byte[]> check = plainText =>
{
byte[] cipherText, newPlainText;
using (var algorithm = new SimpleSymmetricAlgorithm {
Mode = CipherMode.ECB, Padding = PaddingMode.Zeros
})
{
algorithm.GenerateKey();
algorithm.GenerateIV();
InternalEncryptAndDecrypt(algorithm, plainText, out cipherText, out newPlainText);
}
for (int i = 0; i < plainText.Length; i++)
{
Assert.Equal(plainText[i], newPlainText[i]);
}
for (int i = plainText.Length; i < newPlainText.Length; i++)
{
Assert.Equal(0, newPlainText[i]);
}
};
foreach (var plainText in BlockSizeMultiplePlainTexts.Union(BlockSizeNonMultiplePlainTexts))
{
check(plainText);
}
}
public void EncryptAndDecryptPaddingNone()
{
Action <byte[]> check = plainText =>
{
byte[] cipherText, newPlainText;
using (var algorithm = new SimpleSymmetricAlgorithm {
Mode = CipherMode.ECB, Padding = PaddingMode.None
})
{
algorithm.GenerateKey();
algorithm.GenerateIV();
InternalEncryptAndDecrypt(algorithm, plainText, out cipherText, out newPlainText);
}
Assert.Equal(plainText, newPlainText);
};
foreach (var plainText in BlockSizeMultiplePlainTexts)
{
check(plainText);
}
foreach (var plainText in BlockSizeNonMultiplePlainTexts)
{
Assert.Throws <CryptographicException>(() => check(plainText));
}
}
public void EncryptAndDecryptPaddingPKCS7()
{
Action <byte[]> check = plainText =>
{
byte[] cipherText, newPlainText, newPlainTextNoDepad;
using (var algorithm = new SimpleSymmetricAlgorithm {
Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7
})
{
algorithm.GenerateKey();
algorithm.GenerateIV();
InternalEncryptAndDecrypt(algorithm, plainText, out cipherText, out newPlainText);
algorithm.Padding = PaddingMode.None;
newPlainTextNoDepad = InternalTransform(algorithm.CreateDecryptor, cipherText);
}
int padCount = newPlainTextNoDepad.Length - newPlainText.Length;
byte[] padding = new byte[padCount];
BlockCopy(newPlainTextNoDepad, newPlainText.Length, padding, 0, padCount);
Assert.Equal(plainText, newPlainText);
for (int i = 0; i < plainText.Length; i++)
{
Assert.Equal(plainText[i], newPlainTextNoDepad[i]);
}
if (padCount > 0)
{
Assert.Equal(padCount, padding[padCount - 1]);
for (int i = 0; i < padCount - 1; i++)
{
Assert.Equal(padCount, padding[i]);
}
}
};
foreach (var plainText in BlockSizeMultiplePlainTexts.Union(BlockSizeNonMultiplePlainTexts))
{
check(plainText);
}
}