EncryptOrDecrypt() [2/3]

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

inlineprivate

Definition at line 302 of file RSACng.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.RSACng.EncryptOrDecrypt(), System.input, System.key, System.Security.Cryptography.AsymmetricAlgorithm.KeySize, and System.Security.Cryptography.CryptographicOperations.ZeroMemory().