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

Org.BouncyCastle.Cms.SignerInfoGenerator

public class SignerInfoGenerator
namespace Org.BouncyCastle.Cms { public class SignerInfoGenerator { public X509Certificate Certificate { get; } public int GeneratedVersion { get; } public ISignatureFactory SignatureFactory { get; } public CmsAttributeTableGenerator SignedAttributeTableGenerator { get; } public SignerIdentifier SignerID { get; } public CmsAttributeTableGenerator UnsignedAttributeTableGenerator { get; } public SignerInfoGeneratorBuilder NewBuilder(); } }