EncryptOrDecrypt() [2/3]

unsafe byte[] System.Security.Cryptography.RSAImplementation.RSACng.EncryptOrDecrypt ( SafeNCryptKeyHandle key, ReadOnlySpan< byte > input, global::Interop::NCrypt::AsymmetricPaddingMode paddingMode, void * paddingInfo, bool encrypt )

inlineprivate

Definition at line 301 of file RSAImplementation.cs.

        {
            int num = KeySize / 8;
            byte[] array = new byte[num];
            int bytesNeeded = 0;
            global::Interop.NCrypt.ErrorCode errorCode = global::Interop.NCrypt.ErrorCode.ERROR_SUCCESS;
            for (int i = 0; i <= 1; i++)
            {
                errorCode = EncryptOrDecrypt(key, input, array, paddingMode, paddingInfo, encrypt, out bytesNeeded);
                if (errorCode != global::Interop.NCrypt.ErrorCode.STATUS_UNSUCCESSFUL)
                {
                    break;
                }
            }
            if (errorCode == global::Interop.NCrypt.ErrorCode.NTE_BUFFER_TOO_SMALL)
            {
                CryptographicOperations.ZeroMemory(array);
                array = new byte[bytesNeeded];
                for (int j = 0; j <= 1; j++)
                {
                    errorCode = EncryptOrDecrypt(key, input, array, paddingMode, paddingInfo, encrypt, out bytesNeeded);
                    if (errorCode != global::Interop.NCrypt.ErrorCode.STATUS_UNSUCCESSFUL)
                    {
                        break;
                    }
                }
            }
            if (errorCode != 0)
            {
                throw errorCode.ToCryptographicException();
            }
            if (bytesNeeded != array.Length)
            {
                byte[] array2 = array.AsSpan(0, bytesNeeded).ToArray();
                CryptographicOperations.ZeroMemory(array);
                array = array2;
            }
            return array;
        }

References System.array, System.Security.Cryptography.RSAImplementation.RSACng.EncryptOrDecrypt(), System.input, System.key, System.Security.Cryptography.AsymmetricAlgorithm.KeySize, and System.Security.Cryptography.CryptographicOperations.ZeroMemory().