iTextSharp.text.pdf.security.PdfPKCS7.GetAuthenticatedAttributeSet C# (CSharp) Метод

        private DerSet GetAuthenticatedAttributeSet(byte[] secondDigest, DateTime signingTime, byte[] ocsp, ICollection<byte[]> crlBytes, CryptoStandard sigtype)
        {
            Asn1EncodableVector attribute = new Asn1EncodableVector();
            Asn1EncodableVector v = new Asn1EncodableVector();
            v.Add(new DerObjectIdentifier(SecurityIDs.ID_CONTENT_TYPE));
            v.Add(new DerSet(new DerObjectIdentifier(SecurityIDs.ID_PKCS7_DATA)));
            attribute.Add(new DerSequence(v));
            v = new Asn1EncodableVector();
            v.Add(new DerObjectIdentifier(SecurityIDs.ID_SIGNING_TIME));
            v.Add(new DerSet(new DerUtcTime(signingTime)));
            attribute.Add(new DerSequence(v));
            v = new Asn1EncodableVector();
            v.Add(new DerObjectIdentifier(SecurityIDs.ID_MESSAGE_DIGEST));
            v.Add(new DerSet(new DerOctetString(secondDigest)));
            attribute.Add(new DerSequence(v));

            bool haveCrl = false;
            if (crlBytes != null) {
                foreach (byte[] bCrl in crlBytes) {
                    if (bCrl != null) {
                        haveCrl = true;
                        break;
                    }
                }
            }
            if (ocsp != null || haveCrl) {
                v = new Asn1EncodableVector();
                v.Add(new DerObjectIdentifier(SecurityIDs.ID_ADBE_REVOCATION));

                Asn1EncodableVector revocationV = new Asn1EncodableVector();

                if (haveCrl) {
                    Asn1EncodableVector v2 = new Asn1EncodableVector();
                    foreach (byte[] bCrl in crlBytes) {
                        if (bCrl == null)
                            continue;
                        Asn1InputStream t = new Asn1InputStream(bCrl);
                        v2.Add(t.ReadObject());
                    }
                    revocationV.Add(new DerTaggedObject(true, 0, new DerSequence(v2)));
                }

                if (ocsp != null) {
                    DerOctetString doctet = new DerOctetString(ocsp);
                    Asn1EncodableVector vo1 = new Asn1EncodableVector();
                    Asn1EncodableVector v2 = new Asn1EncodableVector();
                    v2.Add(OcspObjectIdentifiers.PkixOcspBasic);
                    v2.Add(doctet);
                    DerEnumerated den = new DerEnumerated(0);
                    Asn1EncodableVector v3 = new Asn1EncodableVector();
                    v3.Add(den);
                    v3.Add(new DerTaggedObject(true, 0, new DerSequence(v2)));
                    vo1.Add(new DerSequence(v3));
                    revocationV.Add(new DerTaggedObject(true, 1, new DerSequence(vo1)));
                }

                v.Add(new DerSet(new DerSequence(revocationV)));
                attribute.Add(new DerSequence(v));
            }
            if (sigtype == CryptoStandard.CADES) {
                v = new Asn1EncodableVector();
                v.Add(new DerObjectIdentifier(SecurityIDs.ID_AA_SIGNING_CERTIFICATE_V2));

                Asn1EncodableVector aaV2 = new Asn1EncodableVector();
                AlgorithmIdentifier algoId = new AlgorithmIdentifier(new DerObjectIdentifier(digestAlgorithmOid), null);
                aaV2.Add(algoId);
                byte[] dig = DigestAlgorithms.Digest(GetHashAlgorithm(), signCert.GetEncoded());
                aaV2.Add(new DerOctetString(dig));

                v.Add(new DerSet(new DerSequence(new DerSequence(new DerSequence(aaV2)))));
                attribute.Add(new DerSequence(v));
            }

            return new DerSet(attribute);
        }