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

Org.BouncyCastle.Crypto.Paddings.X923Padding

A padder that adds X9.23 padding to a block - if a SecureRandom is passed in random padding is assumed, otherwise padding with zeros is used.
namespace Org.BouncyCastle.Crypto.Paddings { public class X923Padding : IBlockCipherPadding { public string PaddingName { get; } public void Init(SecureRandom random); public int AddPadding(byte[] input, int inOff); public int AddPadding(Span<byte> block, int position); public int PadCount(byte[] input); public int PadCount(ReadOnlySpan<byte> block); public X923Padding(); } }