<PackageReference Include="BouncyCastle.Cryptography" Version="2.6.0" />

IDsa

public interface IDsa
Interface for classes implementing the Digital Signature Algorithm
using Org.BouncyCastle.Math; namespace Org.BouncyCastle.Crypto { public interface IDsa { string AlgorithmName { get; } BigInteger Order { get; } void Init(bool forSigning, ICipherParameters parameters); BigInteger[] GenerateSignature(byte[] message); bool VerifySignature(byte[] message, BigInteger r, BigInteger s); } }