public void SymmetricEncryption(SymmetricAlgorithmName name, SymmetricAlgorithmMode mode, SymmetricAlgorithmPadding padding)
{
Skip.If(mode.IsAuthenticated(), "This test is only for non-authenticated block modes.");
bool badCombination = false;
badCombination |= !mode.IsBlockCipher() && padding != SymmetricAlgorithmPadding.None; // Padding does not apply to streaming ciphers.
badCombination |= name.IsBlockCipher() != mode.IsBlockCipher(); // Incompatible cipher and block mode.
Func <ISymmetricKeyAlgorithmProvider> creator = () => WinRTCrypto.SymmetricKeyAlgorithmProvider.OpenAlgorithm(name, mode, padding);
if (badCombination)
{
Assert.Throws <ArgumentException>(creator);
this.logger.WriteLine("Expected exception thrown for invalid combination.");
return;
}
var algorithm = creator();
int keyLength = algorithm.LegalKeySizes.First().MinSize;
var keyMaterial = WinRTCrypto.CryptographicBuffer.GenerateRandom(keyLength / 8);
using (var key = algorithm.CreateSymmetricKey(keyMaterial))
{
var ciphertext = WinRTCrypto.CryptographicEngine.Encrypt(key, new byte[algorithm.BlockLength], null);
Assert.NotEmpty(ciphertext);
}
}
public void SymmetricEncryption(SymmetricAlgorithmName name, SymmetricAlgorithmMode mode, SymmetricAlgorithmPadding padding)
{
Skip.If(mode.IsAuthenticated(), "This test is only for non-authenticated block modes.");
bool badCombination = false;
badCombination |= !mode.IsBlockCipher() && padding != SymmetricAlgorithmPadding.None; // Padding does not apply to streaming ciphers.
badCombination |= name.IsBlockCipher() != mode.IsBlockCipher(); // Incompatible cipher and block mode.
Func<ISymmetricKeyAlgorithmProvider> creator = () => WinRTCrypto.SymmetricKeyAlgorithmProvider.OpenAlgorithm(name, mode, padding);
if (badCombination)
{
Assert.Throws<ArgumentException>(creator);
this.logger.WriteLine("Expected exception thrown for invalid combination.");
return;
}
using (var algorithm = creator())
{
int keyLength = algorithm.LegalKeySizes.First().MinSize;
var keyMaterial = WinRTCrypto.CryptographicBuffer.GenerateRandom(keyLength / 8);
using (var key = algorithm.CreateSymmetricKey(keyMaterial))
{
var ciphertext = WinRTCrypto.CryptographicEngine.Encrypt(key, new byte[algorithm.BlockLength], null);
Assert.NotEqual(0, ciphertext.Length);
}
}
}
