internal static extern uint NCryptEncrypt(SafeNCryptKeyHandle hKey,
byte[] pbInput,
int cbInput,
ref BCrypt.BCRYPT_OAEP_PADDING_INFO pvPadding,
byte[] pbOutput,
uint cbOutput,
out uint pcbResult,
uint dwFlags);
public static byte[] Decrypt(byte[] cipherText, CngKey key, CngAlgorithm hash)
{
var paddingInfo = new BCrypt.BCRYPT_OAEP_PADDING_INFO(hash.Algorithm);
uint plainTextByteSize;
uint status = NCrypt.NCryptDecrypt(key.Handle, cipherText, cipherText.Length, ref paddingInfo, null, 0, out plainTextByteSize, BCrypt.BCRYPT_PAD_OAEP);
if (status != BCrypt.ERROR_SUCCESS)
{
throw new CryptographicException(string.Format("NCrypt.Decrypt() (plaintext buffer size) failed with status code:{0}", status));
}
var plainText = new byte[plainTextByteSize];
status = NCrypt.NCryptDecrypt(key.Handle, cipherText, cipherText.Length, ref paddingInfo, plainText, plainTextByteSize, out plainTextByteSize, BCrypt.BCRYPT_PAD_OAEP);
if (status != BCrypt.ERROR_SUCCESS)
{
throw new CryptographicException(string.Format("NCrypt.Decrypt() failed with status code:{0}", status));
}
return(plainText);
}