/// <summary> /// Gets the <see cref="OcspResp"/> for the <see cref="OcspReq"/> /// </summary> /// <param name="ocspRequest"></param> /// <param name="issuerCertificate"></param> /// <returns></returns> private async Task <OcspResp> GetOcspDefinitiveResponse(OcspReq ocspRequest, X509Certificate issuerCertificate) { var basicResponseGenerator = new BasicOcspRespGenerator( new RespID( await OcspResponderRepository.GetResponderPublicKey(issuerCertificate))); var extensionsGenerator = new X509ExtensionsGenerator(); var nextUpdate = await OcspResponderRepository.GetNextUpdate(); foreach (var request in ocspRequest.GetRequestList()) { var certificateId = request.GetCertID(); var serialNumber = certificateId.SerialNumber; CertificateStatus certificateStatus; CaCompromisedStatus caCompromisedStatus = await OcspResponderRepository.IsCaCompromised(issuerCertificate); if (caCompromisedStatus.IsCompromised) { // See section 2.7 of RFC 6960 certificateStatus = new RevokedStatus(caCompromisedStatus.CompromisedDate.Value.UtcDateTime, (int)RevocationReason.CACompromise); } else { // Se section 2.2 of RFC 6960 if (await OcspResponderRepository.SerialExists(serialNumber, issuerCertificate)) { var status = await OcspResponderRepository.SerialIsRevoked(serialNumber, issuerCertificate); certificateStatus = status.IsRevoked ? new RevokedStatus(status.RevokedInfo.Date.UtcDateTime, (int)status.RevokedInfo.Reason) : CertificateStatus.Good; } else { certificateStatus = new RevokedStatus(new DateTime(1970, 1, 1), CrlReason.CertificateHold); extensionsGenerator.AddExtension(OcspObjectIdentifierExtensions.PkixOcspExtendedRevoke, false, DerNull.Instance.GetDerEncoded()); } } basicResponseGenerator.AddResponse(certificateId, certificateStatus, DateTimeOffset.UtcNow.DateTime, nextUpdate.UtcDateTime, null); } SetNonceExtension(ocspRequest, extensionsGenerator); basicResponseGenerator.SetResponseExtensions(extensionsGenerator.Generate()); // Algorithm that all clients shall accept as defined in section 4.3 of RFC 6960 const string signatureAlgorithm = "sha256WithRSAEncryption"; var basicOcspResponse = basicResponseGenerator.Generate( signatureAlgorithm, await OcspResponderRepository.GetResponderPrivateKey(issuerCertificate), await OcspResponderRepository.GetChain(issuerCertificate), nextUpdate.UtcDateTime); var ocspResponse = OcspResponseGenerator.Generate(OcspRespStatus.Successful, basicOcspResponse); return(ocspResponse); }
/// <param name="caCertificate"></param> /// <inheritdoc /> public Task <CaCompromisedStatus> IsCaCompromised(X509Certificate caCertificate) { var dotNetCertificate = new X509Certificate2(caCertificate.GetEncoded()); return(OcspResponderRepository.IsCaCompromised(dotNetCertificate)); }