using Org.BouncyCastle.Asn1; using Org.BouncyCastle.Asn1.Cms; using Org.BouncyCastle.Crypto; using Org.BouncyCastle.X509; namespace Org.BouncyCastle.Cms { public class SignerInfoGeneratorBuilder { private bool directSignature; private CmsAttributeTableGenerator signedGen; private CmsAttributeTableGenerator unsignedGen; public SignerInfoGeneratorBuilder SetDirectSignature(bool hasNoSignedAttributes) { directSignature = hasNoSignedAttributes; return this; } public SignerInfoGeneratorBuilder WithSignedAttributeGenerator(CmsAttributeTableGenerator signedGen) { this.signedGen = signedGen; return this; } public SignerInfoGeneratorBuilder WithUnsignedAttributeGenerator(CmsAttributeTableGenerator unsignedGen) { this.unsignedGen = unsignedGen; return this; } public SignerInfoGenerator Build(ISignatureFactory contentSigner, X509Certificate certificate) { SignerIdentifier sigId = new SignerIdentifier(new IssuerAndSerialNumber(certificate.CertificateStructure)); SignerInfoGenerator signerInfoGenerator = CreateGenerator(contentSigner, sigId); signerInfoGenerator.SetAssociatedCertificate(certificate); return signerInfoGenerator; } public SignerInfoGenerator Build(ISignatureFactory signerFactory, byte[] subjectKeyIdentifier) { SignerIdentifier sigId = new SignerIdentifier(DerOctetString.FromContents(subjectKeyIdentifier)); return CreateGenerator(signerFactory, sigId); } private SignerInfoGenerator CreateGenerator(ISignatureFactory contentSigner, SignerIdentifier sigId) { if (directSignature) return new SignerInfoGenerator(sigId, contentSigner, true); if (signedGen != null || unsignedGen != null) { if (signedGen == null) signedGen = new DefaultSignedAttributeTableGenerator(); return new SignerInfoGenerator(sigId, contentSigner, signedGen, unsignedGen); } return new SignerInfoGenerator(sigId, contentSigner); } } }