SafeAlgorithmHandle ICngSymmetricAlgorithm.GetEphemeralModeHandle(CipherMode mode, int feedbackSizeInBits)
{
try
{
return(AesBCryptModes.GetSharedHandle(mode, feedbackSizeInBits / 8));
}
catch (NotSupportedException)
{
throw new CryptographicException(SR.Cryptography_InvalidCipherMode);
}
}
private static UniversalCryptoTransform CreateTransformCore(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
byte[]?iv,
int blockSize,
int paddingSize,
int feedbackSize,
bool encrypting)
{
SafeAlgorithmHandle algorithm = AesBCryptModes.GetSharedHandle(cipherMode, feedbackSize);
BasicSymmetricCipher cipher = new BasicSymmetricCipherBCrypt(algorithm, cipherMode, blockSize, paddingSize, key, false, iv, encrypting);
return(UniversalCryptoTransform.Create(paddingMode, cipher, encrypting));
}
private static ILiteSymmetricCipher CreateLiteCipher(
CipherMode cipherMode,
ReadOnlySpan <byte> key,
ReadOnlySpan <byte> iv,
int blockSize,
int paddingSize,
int feedbackSize,
bool encrypting)
{
SafeAlgorithmHandle algorithm = AesBCryptModes.GetSharedHandle(cipherMode, feedbackSize);
return(new BasicSymmetricCipherLiteBCrypt(
algorithm,
cipherMode,
blockSize,
paddingSize,
key,
ownsParentHandle: false,
iv,
encrypting));
}
SafeAlgorithmHandle ICngSymmetricAlgorithm.GetEphemeralModeHandle()
{
return(AesBCryptModes.GetSharedHandle(Mode));
}