private void ReadSignersInfo() { _nodes = new List <SignerInfoNode>(); foreach (var signer in _signedData.GetSignerInfos().GetSigners()) { SignerInfoNode node = new SignerInfoNode((SignerInformation)signer, this); _nodes.Add(node); } }
private SignerInformation GetSignerInformation(SignerInfoNode signerInfoNode) { if (signerInfoNode.CounterSignatures.Count > 0) { var nodes = GetCounterSignatures(signerInfoNode); BcCms.AttributeTable attributes = signerInfoNode.SignerInformation.UnsignedAttributes.Remove(CmsAttributes.CounterSignature); SignerInformation newSignerInformation = SignerInformation.ReplaceUnsignedAttributes(signerInfoNode.SignerInformation, attributes); return(SignerInformation.AddCounterSigners(newSignerInformation, new SignerInformationStore(nodes.ToArray()))); } else { return(signerInfoNode.SignerInformation); } }
private IList <SignerInformation> GetCounterSignatures(SignerInfoNode node) { List <SignerInformation> list = new List <SignerInformation>(); foreach (var counterSignNode in node.CounterSignatures) { if (counterSignNode.CounterSignatures.Count > 0) { var nodes = GetCounterSignatures(counterSignNode); BcCms.AttributeTable attributes = counterSignNode.SignerInformation.UnsignedAttributes.Remove(CmsAttributes.CounterSignature); SignerInformation newSignerInformation = SignerInformation.ReplaceUnsignedAttributes(counterSignNode.SignerInformation, attributes); list.Add(SignerInformation.AddCounterSigners(newSignerInformation, new SignerInformationStore(nodes.ToArray()))); } else { list.Add(counterSignNode.SignerInformation); } } return(list); }
private void ReadInformation() { if (_signerInformation.SignedAttributes[PkcsObjectIdentifiers.Pkcs9AtSigningTime] != null) { _signingDate = DerUtcTime.GetInstance(_signerInformation.SignedAttributes[PkcsObjectIdentifiers.Pkcs9AtSigningTime].AttrValues[0]).ToDateTime().ToLocalTime(); } if (_signerInformation.SignedAttributes[PkcsObjectIdentifiers.IdAAEtsSignerAttr] != null) { var signerAttr = SignerAttribute.GetInstance(_signerInformation.SignedAttributes[PkcsObjectIdentifiers.IdAAEtsSignerAttr].AttrValues[0]); List <string> claimedRoles = new List <string>(); foreach (BcCms.Attribute claimedAttr in signerAttr.ClaimedAttributes) { foreach (var value in claimedAttr.AttrValues) { claimedRoles.Add(DerUtf8String.GetInstance(value).GetString()); } } _signerRoles = claimedRoles; } if (_signerInformation.UnsignedAttributes != null && _signerInformation.UnsignedAttributes[PkcsObjectIdentifiers.IdAASignatureTimeStampToken] != null) { _timeStamp = new TimeStampToken(new CmsSignedData(_signerInformation.UnsignedAttributes[PkcsObjectIdentifiers.IdAASignatureTimeStampToken].AttrValues[0].GetEncoded())); } // Se leen las contrafirmas var signers = _signerInformation.GetCounterSignatures().GetSigners(); _counterSignatures = new List <SignerInfoNode>(); foreach (var signer in signers) { SignerInfoNode node = new SignerInfoNode((SignerInformation)signer, _sigDocument); _counterSignatures.Add(node); } // Se intenta identificar el certificado empleado para la firma, esto quizás se pueda mejorar byte[] certHash = null; IssuerSerial issuerSerial = null; if (_signerInformation.DigestAlgOid == DigestMethod.SHA1.Oid) { BcCms.Attribute attr = _signerInformation.SignedAttributes[PkcsObjectIdentifiers.IdAASigningCertificate]; SigningCertificate sc = SigningCertificate.GetInstance(attr.AttrValues[0]); EssCertID ecid = sc.GetCerts()[0]; issuerSerial = ecid.IssuerSerial; certHash = ecid.GetCertHash(); } else { BcCms.Attribute attr = _signerInformation.SignedAttributes[PkcsObjectIdentifiers.IdAASigningCertificateV2]; SigningCertificateV2 sc2 = SigningCertificateV2.GetInstance(attr.AttrValues[0]); EssCertIDv2 ecid = sc2.GetCerts()[0]; issuerSerial = ecid.IssuerSerial; certHash = ecid.GetCertHash(); } DigestMethod digestMethod = DigestMethod.GetByOid(_signerInformation.DigestAlgOid); foreach (X509CertificateStructure cs in _sigDocument.Certificates) { if (issuerSerial == null || cs.TbsCertificate.SerialNumber.Equals(issuerSerial.Serial)) { byte[] currentCertHash = digestMethod.CalculateDigest(cs.GetEncoded()); if (certHash.SequenceEqual(currentCertHash)) { _certificate = new X509Certificate(cs); break; } } } }