TransformOneShot() [2/2]

unsafe override bool Internal.Cryptography.UniversalCryptoDecryptor.TransformOneShot ( ReadOnlySpan< byte > input, Span< byte > output, out int bytesWritten )

inline

Definition at line 147 of file UniversalCryptoDecryptor.cs.

    {
        if (input.Length % base.PaddingSizeBytes != 0)
        {
            throw new CryptographicException(System.SR.Cryptography_PartialBlock);
        }
        if (!DepaddingRequired)
        {
            if (output.Length >= input.Length)
            {
                bytesWritten = base.BasicSymmetricCipher.TransformFinal(input, output);
                return true;
            }
            bytesWritten = 0;
            return false;
        }
        byte[] array = System.Security.Cryptography.CryptoPool.Rent(input.Length);
        Span<byte> output2 = array.AsSpan(0, input.Length);
        Span<byte> span = default(Span<byte>);
        fixed (byte* ptr = output2)
        {
            try
            {
                span = output2[..base.BasicSymmetricCipher.TransformFinal(input, output2)];
                int paddingLength = GetPaddingLength(span);
                if (paddingLength > output.Length)
                {
                    bytesWritten = 0;
                    return false;
                }
                span.Slice(0, paddingLength).CopyTo(output);
                bytesWritten = paddingLength;
                return true;
            }
            finally
            {
                CryptographicOperations.ZeroMemory(span);
                System.Security.Cryptography.CryptoPool.Return(array, 0);
            }
        }
    }

References System.array, System.SR.Cryptography_PartialBlock, Internal.Cryptography.UniversalCryptoDecryptor.DepaddingRequired, Internal.Cryptography.UniversalCryptoDecryptor.GetPaddingLength(), System.input, System.Span< T >.Length, System.Security.Cryptography.CryptoPool.Rent(), System.Security.Cryptography.CryptoPool.Return(), System.Span< T >.Slice(), and System.Security.Cryptography.CryptographicOperations.ZeroMemory().