<PackageReference Include="BouncyCastle.Cryptography" Version="2.7.0" />

Org.BouncyCastle.Utilities.Encoders.BufferedEncoder

public class BufferedEncoder
A class that allows encoding of data using a specific encoder to be processed in chunks.
namespace Org.BouncyCastle.Utilities.Encoders { public class BufferedEncoder { public BufferedEncoder(ITranslator translator, int bufferSize); public int ProcessByte(byte input, byte[] outBytes, int outOff); public int ProcessBytes(byte[] input, int inOff, int len, byte[] outBytes, int outOff); } }