namespace Org.BouncyCastle.Crypto.Engines { public sealed class AesEngine : IBlockCipher { public string AlgorithmName { get; } public AesEngine(); public void Init(bool forEncryption, ICipherParameters parameters); public int GetBlockSize(); public int ProcessBlock(byte[] input, int inOff, byte[] output, int outOff); public int ProcessBlock(ReadOnlySpan<byte> input, Span<byte> output); } }