<PackageReference Include="BouncyCastle.Cryptography" Version="2.3.0" />

Org.BouncyCastle.Crypto.ISignatureFactory

public interface ISignatureFactory
Base interface for operators that serve as stream-based signature calculators.
namespace Org.BouncyCastle.Crypto { public interface ISignatureFactory { object AlgorithmDetails { get; } IStreamCalculator<IBlockResult> CreateCalculator(); } }