<PackageReference Include="BouncyCastle.Cryptography" Version="2.6.2" />

Org.BouncyCastle.Crypto.Modes.OpenPgpCfbBlockCipher

public string AlgorithmName { get; }

public bool IsPartialBlockOkay { get; }

public int GetBlockSize()

public void Init(bool forEncryption, ICipherParameters parameters)

public int ProcessBlock(byte[] input, int inOff, byte[] output, int outOff)

public void Reset()