public CertificateValidationResult Validate(Certificate certificate) { if (certificate == null) throw new ArgumentNullException("certificate"); try { var x509Certs = new List<X509Certificate>(); x509Certs.AddRange(_chain.Select(c => c.BouncyX509Certificate)); x509Certs.Add(certificate.BouncyX509Certificate); IX509Store x509CertStore = X509StoreFactory.Create("Certificate/Collection", new X509CollectionStoreParameters(x509Certs)); var x509Certificates = x509Certs.Skip(1).ToList(); var certPath = new PkixCertPath(x509Certificates); ISet trust = new HashSet { new TrustAnchor(x509Certs.First(), null) }; var certPathValidator = new PkixCertPathValidator(); var paramsPkix = new PkixParameters(trust); paramsPkix.AddStore(x509CertStore); paramsPkix.IsRevocationEnabled = false; var pkixResult = certPathValidator.Validate(certPath, paramsPkix); return new CertificateValidationResult(pkixResult); } catch (Exception e) { return new CertificateValidationResult(e); } }
/// <summary> /// Builds certification path for provided signing certificate /// </summary> /// <param name="signingCertificate">Signing certificate</param> /// <param name="otherCertificates">Other certificates that should be used in path building process. Self-signed certificates from this list are used as trust anchors.</param> /// <returns>Certification path for provided signing certificate</returns> public static ICollection <BCX509.X509Certificate> BuildCertPath(byte[] signingCertificate, List <byte[]> otherCertificates) { if (signingCertificate == null) { throw new ArgumentNullException("signingCertificate"); } List <BCX509.X509Certificate> result = new List <BCX509.X509Certificate>(); BCX509.X509Certificate signingCert = ToBouncyCastleObject(signingCertificate); BCCollections.ISet trustAnchors = new BCCollections.HashSet(); List <BCX509.X509Certificate> otherCerts = new List <BCX509.X509Certificate>(); if (IsSelfSigned(signingCert)) { result.Add(signingCert); } else { otherCerts.Add(signingCert); if (otherCertificates != null) { foreach (byte[] otherCertificate in otherCertificates) { BCX509.X509Certificate otherCert = ToBouncyCastleObject(otherCertificate); otherCerts.Add(ToBouncyCastleObject(otherCertificate)); if (IsSelfSigned(otherCert)) { trustAnchors.Add(new TrustAnchor(otherCert, null)); } } } if (trustAnchors.Count < 1) { throw new PkixCertPathBuilderException("Provided certificates do not contain self-signed root certificate"); } X509CertStoreSelector targetConstraints = new X509CertStoreSelector(); targetConstraints.Certificate = signingCert; PkixBuilderParameters certPathBuilderParameters = new PkixBuilderParameters(trustAnchors, targetConstraints); certPathBuilderParameters.AddStore(X509StoreFactory.Create("Certificate/Collection", new X509CollectionStoreParameters(otherCerts))); certPathBuilderParameters.IsRevocationEnabled = false; PkixCertPathBuilder certPathBuilder = new PkixCertPathBuilder(); PkixCertPathBuilderResult certPathBuilderResult = certPathBuilder.Build(certPathBuilderParameters); foreach (BCX509.X509Certificate certPathCert in certPathBuilderResult.CertPath.Certificates) { result.Add(certPathCert); } result.Add(certPathBuilderResult.TrustAnchor.TrustedCert); } return(result); }
private void baseTest() { // CertificateFactory cf = CertificateFactory.getInstance("X.509", "BC"); X509CertificateParser certParser = new X509CertificateParser(); X509CrlParser crlParser = new X509CrlParser(); // initialise CertStore X509Certificate rootCert = certParser.ReadCertificate(CertPathTest.rootCertBin); X509Certificate interCert = certParser.ReadCertificate(CertPathTest.interCertBin); X509Certificate finalCert = certParser.ReadCertificate(CertPathTest.finalCertBin); X509Crl rootCrl = crlParser.ReadCrl(CertPathTest.rootCrlBin); X509Crl interCrl = crlParser.ReadCrl(CertPathTest.interCrlBin); IList certList = new ArrayList(); certList.Add(rootCert); certList.Add(interCert); certList.Add(finalCert); IList crlList = new ArrayList(); crlList.Add(rootCrl); crlList.Add(interCrl); // CollectionCertStoreParameters ccsp = new CollectionCertStoreParameters(list); // CertStore store = CertStore.getInstance("Collection", ccsp, "BC"); IX509Store x509CertStore = X509StoreFactory.Create( "Certificate/Collection", new X509CollectionStoreParameters(certList)); IX509Store x509CrlStore = X509StoreFactory.Create( "CRL/Collection", new X509CollectionStoreParameters(crlList)); // NB: Month is 1-based in .NET //DateTime validDate = new DateTime(2008, 9, 4, 14, 49, 10).ToUniversalTime(); DateTime validDate = new DateTime(2008, 9, 4, 5, 49, 10);//.ToUniversalTime(); //Searching for rootCert by subjectDN without CRL ISet trust = new HashSet(); trust.Add(new TrustAnchor(rootCert, null)); // CertPathBuilder cpb = CertPathBuilder.getInstance("PKIX","BC"); PkixCertPathBuilder cpb = new PkixCertPathBuilder(); X509CertStoreSelector targetConstraints = new X509CertStoreSelector(); targetConstraints.Subject = finalCert.SubjectDN; PkixBuilderParameters parameters = new PkixBuilderParameters(trust, targetConstraints); // parameters.addCertStore(store); parameters.AddStore(x509CertStore); parameters.AddStore(x509CrlStore); parameters.Date = new DateTimeObject(validDate); PkixCertPathBuilderResult result = cpb.Build(parameters); PkixCertPath path = result.CertPath; if (path.Certificates.Count != 2) { Fail("wrong number of certs in baseTest path"); } }
/** * Build and validate a CertPath using the given parameter. * * @param params PKIXBuilderParameters object containing all information to * build the CertPath */ public virtual PkixCertPathBuilderResult Build( PkixBuilderParameters pkixParams) { // search target certificates IX509Selector certSelect = pkixParams.GetTargetCertConstraints(); if (!(certSelect is X509CertStoreSelector)) { throw new PkixCertPathBuilderException( "TargetConstraints must be an instance of " + typeof(X509CertStoreSelector).FullName + " for " + this.GetType() + " class."); } ISet targets = new HashSet(); try { targets.AddAll(PkixCertPathValidatorUtilities.FindCertificates((X509CertStoreSelector)certSelect, pkixParams.GetStores())); // TODO Should this include an entry for pkixParams.GetAdditionalStores() too? } catch (Exception e) { throw new PkixCertPathBuilderException( "Error finding target certificate.", e); } if (targets.IsEmpty) throw new PkixCertPathBuilderException("No certificate found matching targetContraints."); PkixCertPathBuilderResult result = null; IList certPathList = new ArrayList(); // check all potential target certificates foreach (X509Certificate cert in targets) { result = Build(cert, pkixParams, certPathList); if (result != null) break; } if (result == null && certPathException != null) { throw new PkixCertPathBuilderException(certPathException.Message, certPathException.InnerException); } if (result == null && certPathException == null) { throw new PkixCertPathBuilderException("Unable to find certificate chain."); } return result; }
/// <summary> /// Builds certification path for provided signing certificate /// </summary> /// <param name="signingCertificate">Signing certificate</param> /// <param name="otherCertificates">Other certificates that should be used in path building process. Self-signed certificates from this list are used as trust anchors.</param> /// <param name="includeRoot">Flag indicating whether root certificate should be included int the certification path.</param> /// <returns>Certification path for provided signing certificate</returns> public static ICollection<BCX509.X509Certificate> BuildCertPath(byte[] signingCertificate, List<byte[]> otherCertificates, bool includeRoot) { if (signingCertificate == null) throw new ArgumentNullException("signingCertificate"); List<BCX509.X509Certificate> result = new List<BCX509.X509Certificate>(); BCX509.X509Certificate signingCert = ToBouncyCastleObject(signingCertificate); BCCollections.ISet trustAnchors = new BCCollections.HashSet(); List<BCX509.X509Certificate> otherCerts = new List<BCX509.X509Certificate>(); if (IsSelfSigned(signingCert)) { if (includeRoot) result.Add(signingCert); } else { otherCerts.Add(signingCert); if (otherCertificates != null) { foreach (byte[] otherCertificate in otherCertificates) { BCX509.X509Certificate otherCert = ToBouncyCastleObject(otherCertificate); otherCerts.Add(ToBouncyCastleObject(otherCertificate)); if (IsSelfSigned(otherCert)) trustAnchors.Add(new TrustAnchor(otherCert, null)); } } if (trustAnchors.Count < 1) throw new PkixCertPathBuilderException("Provided certificates do not contain self-signed root certificate"); X509CertStoreSelector targetConstraints = new X509CertStoreSelector(); targetConstraints.Certificate = signingCert; PkixBuilderParameters certPathBuilderParameters = new PkixBuilderParameters(trustAnchors, targetConstraints); certPathBuilderParameters.AddStore(X509StoreFactory.Create("Certificate/Collection", new X509CollectionStoreParameters(otherCerts))); certPathBuilderParameters.IsRevocationEnabled = false; PkixCertPathBuilder certPathBuilder = new PkixCertPathBuilder(); PkixCertPathBuilderResult certPathBuilderResult = certPathBuilder.Build(certPathBuilderParameters); foreach (BCX509.X509Certificate certPathCert in certPathBuilderResult.CertPath.Certificates) result.Add(certPathCert); if (includeRoot) result.Add(certPathBuilderResult.TrustAnchor.TrustedCert); } return result; }
public virtual ISet FindCrls(X509CrlStoreSelector crlselect, PkixParameters paramsPkix) { ISet completeSet = new HashSet(); // get complete CRL(s) try { completeSet.AddAll(FindCrls(crlselect, paramsPkix.GetStores())); } catch (Exception e) { throw new Exception("Exception obtaining complete CRLs.", e); } return completeSet; }
public virtual ISet FindCrls(X509CrlStoreSelector crlselect, PkixParameters paramsPkix, DateTime currentDate) { ISet initialSet = new HashSet(); // get complete CRL(s) try { initialSet.AddAll(FindCrls(crlselect, paramsPkix.GetAdditionalStores())); initialSet.AddAll(FindCrls(crlselect, paramsPkix.GetStores())); } catch (Exception e) { throw new Exception("Exception obtaining complete CRLs.", e); } ISet finalSet = new HashSet(); DateTime validityDate = currentDate; if (paramsPkix.Date != null) { validityDate = paramsPkix.Date.Value; } // based on RFC 5280 6.3.3 foreach (X509Crl crl in initialSet) { if (crl.NextUpdate.Value.CompareTo(validityDate) > 0) { X509Certificate cert = crlselect.CertificateChecking; if (cert != null) { if (crl.ThisUpdate.CompareTo(cert.NotAfter) < 0) { finalSet.Add(crl); } } else { finalSet.Add(crl); } } } return finalSet; }
protected virtual ISet GetExtensionOids( bool critical) { X509Extensions extensions = GetX509Extensions(); if (extensions != null) { HashSet set = new HashSet(); foreach (DerObjectIdentifier oid in extensions.ExtensionOids) { X509Extension ext = extensions.GetExtension(oid); if (ext.IsCritical == critical) { set.Add(oid.Id); } } return set; } return null; }
/** * Obtain and validate the certification path for the complete CRL issuer. * If a key usage extension is present in the CRL issuer's certificate, * verify that the cRLSign bit is set. * * @param crl CRL which contains revocation information for the certificate * <code>cert</code>. * @param cert The attribute certificate or certificate to check if it is * revoked. * @param defaultCRLSignCert The issuer certificate of the certificate <code>cert</code>. * @param defaultCRLSignKey The public key of the issuer certificate * <code>defaultCRLSignCert</code>. * @param paramsPKIX paramsPKIX PKIX parameters. * @param certPathCerts The certificates on the certification path. * @return A <code>Set</code> with all keys of possible CRL issuer * certificates. * @throws AnnotatedException if the CRL is not valid or the status cannot be checked or * some error occurs. */ internal static ISet ProcessCrlF( X509Crl crl, object cert, X509Certificate defaultCRLSignCert, AsymmetricKeyParameter defaultCRLSignKey, PkixParameters paramsPKIX, IList certPathCerts) { // (f) // get issuer from CRL X509CertStoreSelector selector = new X509CertStoreSelector(); try { selector.Subject = crl.IssuerDN; } catch (IOException e) { throw new Exception( "Subject criteria for certificate selector to find issuer certificate for CRL could not be set.", e); } // get CRL signing certs IList coll = Platform.CreateArrayList(); try { CollectionUtilities.AddRange(coll, PkixCertPathValidatorUtilities.FindCertificates(selector, paramsPKIX.GetStores())); CollectionUtilities.AddRange(coll, PkixCertPathValidatorUtilities.FindCertificates(selector, paramsPKIX.GetAdditionalStores())); } catch (Exception e) { throw new Exception("Issuer certificate for CRL cannot be searched.", e); } coll.Add(defaultCRLSignCert); IEnumerator cert_it = coll.GetEnumerator(); IList validCerts = Platform.CreateArrayList(); IList validKeys = Platform.CreateArrayList(); while (cert_it.MoveNext()) { X509Certificate signingCert = (X509Certificate)cert_it.Current; /* * CA of the certificate, for which this CRL is checked, has also * signed CRL, so skip the path validation, because is already done */ if (signingCert.Equals(defaultCRLSignCert)) { validCerts.Add(signingCert); validKeys.Add(defaultCRLSignKey); continue; } try { // CertPathBuilder builder = CertPathBuilder.GetInstance("PKIX"); PkixCertPathBuilder builder = new PkixCertPathBuilder(); selector = new X509CertStoreSelector(); selector.Certificate = signingCert; PkixParameters temp = (PkixParameters)paramsPKIX.Clone(); temp.SetTargetCertConstraints(selector); PkixBuilderParameters parameters = (PkixBuilderParameters) PkixBuilderParameters.GetInstance(temp); /* * if signingCert is placed not higher on the cert path a * dependency loop results. CRL for cert is checked, but * signingCert is needed for checking the CRL which is dependent * on checking cert because it is higher in the cert path and so * signing signingCert transitively. so, revocation is disabled, * forgery attacks of the CRL are detected in this outer loop * for all other it must be enabled to prevent forgery attacks */ if (certPathCerts.Contains(signingCert)) { parameters.IsRevocationEnabled = false; } else { parameters.IsRevocationEnabled = true; } IList certs = builder.Build(parameters).CertPath.Certificates; validCerts.Add(signingCert); validKeys.Add(PkixCertPathValidatorUtilities.GetNextWorkingKey(certs, 0)); } catch (PkixCertPathBuilderException e) { throw new Exception("Internal error.", e); } catch (PkixCertPathValidatorException e) { throw new Exception("Public key of issuer certificate of CRL could not be retrieved.", e); } //catch (Exception e) //{ // throw new Exception(e.Message); //} } ISet checkKeys = new HashSet(); Exception lastException = null; for (int i = 0; i < validCerts.Count; i++) { X509Certificate signCert = (X509Certificate)validCerts[i]; bool[] keyusage = signCert.GetKeyUsage(); if (keyusage != null && (keyusage.Length < 7 || !keyusage[CRL_SIGN])) { lastException = new Exception( "Issuer certificate key usage extension does not permit CRL signing."); } else { checkKeys.Add(validKeys[i]); } } if ((checkKeys.Count == 0) && lastException == null) { throw new Exception("Cannot find a valid issuer certificate."); } if ((checkKeys.Count == 0) && lastException != null) { throw lastException; } return checkKeys; }
internal static PkixPolicyNode WrapupCertG( PkixCertPath certPath, PkixParameters paramsPKIX, ISet userInitialPolicySet, int index, IList[] policyNodes, PkixPolicyNode validPolicyTree, ISet acceptablePolicies) { int n = certPath.Certificates.Count; // // (g) // PkixPolicyNode intersection; // // (g) (i) // if (validPolicyTree == null) { if (paramsPKIX.IsExplicitPolicyRequired) { throw new PkixCertPathValidatorException( "Explicit policy requested but none available.", null, certPath, index); } intersection = null; } else if (PkixCertPathValidatorUtilities.IsAnyPolicy(userInitialPolicySet)) // (g) // (ii) { if (paramsPKIX.IsExplicitPolicyRequired) { if (acceptablePolicies.IsEmpty) { throw new PkixCertPathValidatorException( "Explicit policy requested but none available.", null, certPath, index); } else { ISet _validPolicyNodeSet = new HashSet(); for (int j = 0; j < policyNodes.Length; j++) { IList _nodeDepth = policyNodes[j]; for (int k = 0; k < _nodeDepth.Count; k++) { PkixPolicyNode _node = (PkixPolicyNode)_nodeDepth[k]; if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(_node.ValidPolicy)) { foreach (object o in _node.Children) { _validPolicyNodeSet.Add(o); } } } } foreach (PkixPolicyNode _node in _validPolicyNodeSet) { string _validPolicy = _node.ValidPolicy; if (!acceptablePolicies.Contains(_validPolicy)) { // TODO? // validPolicyTree = // removePolicyNode(validPolicyTree, policyNodes, // _node); } } if (validPolicyTree != null) { for (int j = (n - 1); j >= 0; j--) { IList nodes = policyNodes[j]; for (int k = 0; k < nodes.Count; k++) { PkixPolicyNode node = (PkixPolicyNode)nodes[k]; if (!node.HasChildren) { validPolicyTree = PkixCertPathValidatorUtilities.RemovePolicyNode(validPolicyTree, policyNodes, node); } } } } } } intersection = validPolicyTree; } else { // // (g) (iii) // // This implementation is not exactly same as the one described in // RFC3280. // However, as far as the validation result is concerned, both // produce // adequate result. The only difference is whether AnyPolicy is // remain // in the policy tree or not. // // (g) (iii) 1 // ISet _validPolicyNodeSet = new HashSet(); for (int j = 0; j < policyNodes.Length; j++) { IList _nodeDepth = policyNodes[j]; for (int k = 0; k < _nodeDepth.Count; k++) { PkixPolicyNode _node = (PkixPolicyNode)_nodeDepth[k]; if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(_node.ValidPolicy)) { foreach (PkixPolicyNode _c_node in _node.Children) { if (!Rfc3280CertPathUtilities.ANY_POLICY.Equals(_c_node.ValidPolicy)) { _validPolicyNodeSet.Add(_c_node); } } } } } // // (g) (iii) 2 // IEnumerator _vpnsIter = _validPolicyNodeSet.GetEnumerator(); while (_vpnsIter.MoveNext()) { PkixPolicyNode _node = (PkixPolicyNode)_vpnsIter.Current; string _validPolicy = _node.ValidPolicy; if (!userInitialPolicySet.Contains(_validPolicy)) { validPolicyTree = PkixCertPathValidatorUtilities.RemovePolicyNode(validPolicyTree, policyNodes, _node); } } // // (g) (iii) 4 // if (validPolicyTree != null) { for (int j = (n - 1); j >= 0; j--) { IList nodes = policyNodes[j]; for (int k = 0; k < nodes.Count; k++) { PkixPolicyNode node = (PkixPolicyNode)nodes[k]; if (!node.HasChildren) { validPolicyTree = PkixCertPathValidatorUtilities.RemovePolicyNode(validPolicyTree, policyNodes, node); } } } } intersection = validPolicyTree; } return intersection; }
internal static ISet[] ProcessCrlA1ii( DateTime currentDate, PkixParameters paramsPKIX, X509Certificate cert, X509Crl crl) { ISet deltaSet = new HashSet(); X509CrlStoreSelector crlselect = new X509CrlStoreSelector(); crlselect.CertificateChecking = cert; try { IList issuer = Platform.CreateArrayList(); issuer.Add(crl.IssuerDN); crlselect.Issuers = issuer; } catch (IOException e) { throw new Exception("Cannot extract issuer from CRL." + e, e); } crlselect.CompleteCrlEnabled = true; ISet completeSet = CrlUtilities.FindCrls(crlselect, paramsPKIX, currentDate); if (paramsPKIX.IsUseDeltasEnabled) { // get delta CRL(s) try { deltaSet.AddAll(PkixCertPathValidatorUtilities.GetDeltaCrls(currentDate, paramsPKIX, crl)); } catch (Exception e) { throw new Exception("Exception obtaining delta CRLs.", e); } } return new ISet[]{ completeSet, deltaSet }; }
PkixCertPath BuildCertPath(HashSet anchors, IX509Store certificates, IX509Store crls, X509Certificate certificate, DateTime? signingTime) { var intermediate = new X509CertificateStore (); foreach (X509Certificate cert in certificates.GetMatches (null)) intermediate.Add (cert); var selector = new X509CertStoreSelector (); selector.Certificate = certificate; var parameters = new PkixBuilderParameters (anchors, selector); parameters.AddStore (GetIntermediateCertificates ()); parameters.AddStore (intermediate); var localCrls = GetCertificateRevocationLists (); parameters.AddStore (localCrls); parameters.AddStore (crls); // Note: we disable revocation unless we actually have non-empty revocation lists parameters.IsRevocationEnabled = localCrls.GetMatches (null).Count > 0; parameters.ValidityModel = PkixParameters.ChainValidityModel; if (signingTime.HasValue) parameters.Date = new DateTimeObject (signingTime.Value); var result = new PkixCertPathBuilder ().Build (parameters); return result.CertPath; }
internal static ICollection FindCertificates( X509AttrCertStoreSelector certSelect, IList certStores) { ISet certs = new HashSet(); foreach (IX509Store certStore in certStores) { try { // certs.AddAll(certStore.GetMatches(certSelect)); foreach (X509V2AttributeCertificate ac in certStore.GetMatches(certSelect)) { certs.Add(ac); } } catch (Exception e) { throw new Exception( "Problem while picking certificates from X.509 store.", e); } } return certs; }
/** * Build and validate a CertPath using the given parameter. * * @param params PKIXBuilderParameters object containing all information to * build the CertPath */ public virtual PkixCertPathBuilderResult Build( PkixBuilderParameters pkixParams) { // search target certificates IX509Selector certSelect = pkixParams.GetTargetConstraints(); if (!(certSelect is X509AttrCertStoreSelector)) { throw new PkixCertPathBuilderException( "TargetConstraints must be an instance of " + typeof(X509AttrCertStoreSelector).FullName + " for " + typeof(PkixAttrCertPathBuilder).FullName + " class."); } ICollection targets; try { targets = PkixCertPathValidatorUtilities.FindCertificates( (X509AttrCertStoreSelector)certSelect, pkixParams.GetStores()); } catch (Exception e) { throw new PkixCertPathBuilderException("Error finding target attribute certificate.", e); } if (targets.Count == 0) { throw new PkixCertPathBuilderException( "No attribute certificate found matching targetContraints."); } PkixCertPathBuilderResult result = null; // check all potential target certificates foreach (IX509AttributeCertificate cert in targets) { X509CertStoreSelector selector = new X509CertStoreSelector(); X509Name[] principals = cert.Issuer.GetPrincipals(); ISet issuers = new HashSet(); for (int i = 0; i < principals.Length; i++) { try { selector.Subject = principals[i]; issuers.AddAll(PkixCertPathValidatorUtilities.FindCertificates(selector, pkixParams.GetStores())); } catch (Exception e) { throw new PkixCertPathBuilderException( "Public key certificate for attribute certificate cannot be searched.", e); } } if (issuers.IsEmpty) throw new PkixCertPathBuilderException("Public key certificate for attribute certificate cannot be found."); IList certPathList = Platform.CreateArrayList(); foreach (X509Certificate issuer in issuers) { result = Build(cert, issuer, pkixParams, certPathList); if (result != null) break; } if (result != null) break; } if (result == null && certPathException != null) { throw new PkixCertPathBuilderException( "Possible certificate chain could not be validated.", certPathException); } if (result == null && certPathException == null) { throw new PkixCertPathBuilderException( "Unable to find certificate chain."); } return result; }
private PkixCertPathBuilderResult Build( IX509AttributeCertificate attrCert, X509Certificate tbvCert, PkixBuilderParameters pkixParams, IList tbvPath) { // If tbvCert is readily present in tbvPath, it indicates having run // into a cycle in the // PKI graph. if (tbvPath.Contains(tbvCert)) return null; // step out, the certificate is not allowed to appear in a certification // chain if (pkixParams.GetExcludedCerts().Contains(tbvCert)) return null; // test if certificate path exceeds maximum length if (pkixParams.MaxPathLength != -1) { if (tbvPath.Count - 1 > pkixParams.MaxPathLength) return null; } tbvPath.Add(tbvCert); PkixCertPathBuilderResult builderResult = null; // X509CertificateParser certParser = new X509CertificateParser(); PkixAttrCertPathValidator validator = new PkixAttrCertPathValidator(); try { // check whether the issuer of <tbvCert> is a TrustAnchor if (PkixCertPathValidatorUtilities.FindTrustAnchor(tbvCert, pkixParams.GetTrustAnchors()) != null) { PkixCertPath certPath = new PkixCertPath(tbvPath); PkixCertPathValidatorResult result; try { result = validator.Validate(certPath, pkixParams); } catch (Exception e) { throw new Exception("Certification path could not be validated.", e); } return new PkixCertPathBuilderResult(certPath, result.TrustAnchor, result.PolicyTree, result.SubjectPublicKey); } else { // add additional X.509 stores from locations in certificate try { PkixCertPathValidatorUtilities.AddAdditionalStoresFromAltNames(tbvCert, pkixParams); } catch (CertificateParsingException e) { throw new Exception("No additional X.509 stores can be added from certificate locations.", e); } // try to get the issuer certificate from one of the stores ISet issuers = new HashSet(); try { issuers.AddAll(PkixCertPathValidatorUtilities.FindIssuerCerts(tbvCert, pkixParams)); } catch (Exception e) { throw new Exception("Cannot find issuer certificate for certificate in certification path.", e); } if (issuers.IsEmpty) throw new Exception("No issuer certificate for certificate in certification path found."); foreach (X509Certificate issuer in issuers) { // if untrusted self signed certificate continue if (PkixCertPathValidatorUtilities.IsSelfIssued(issuer)) continue; builderResult = Build(attrCert, issuer, pkixParams, tbvPath); if (builderResult != null) break; } } } catch (Exception e) { certPathException = new Exception("No valid certification path could be build.", e); } if (builderResult == null) { tbvPath.Remove(tbvCert); } return builderResult; }
/** * Fetches delta CRLs according to RFC 3280 section 5.2.4. * * @param currentDate The date for which the delta CRLs must be valid. * @param paramsPKIX The extended PKIX parameters. * @param completeCRL The complete CRL the delta CRL is for. * @return A <code>Set</code> of <code>X509CRL</code>s with delta CRLs. * @throws Exception if an exception occurs while picking the delta * CRLs. */ internal static ISet GetDeltaCrls( DateTime currentDate, PkixParameters paramsPKIX, X509Crl completeCRL) { X509CrlStoreSelector deltaSelect = new X509CrlStoreSelector(); // 5.2.4 (a) try { IList deltaSelectIssuer = Platform.CreateArrayList(); deltaSelectIssuer.Add(completeCRL.IssuerDN); deltaSelect.Issuers = deltaSelectIssuer; } catch (IOException e) { throw new Exception("Cannot extract issuer from CRL.", e); } BigInteger completeCRLNumber = null; try { Asn1Object asn1Object = GetExtensionValue(completeCRL, X509Extensions.CrlNumber); if (asn1Object != null) { completeCRLNumber = CrlNumber.GetInstance(asn1Object).PositiveValue; } } catch (Exception e) { throw new Exception( "CRL number extension could not be extracted from CRL.", e); } // 5.2.4 (b) byte[] idp = null; try { Asn1Object obj = GetExtensionValue(completeCRL, X509Extensions.IssuingDistributionPoint); if (obj != null) { idp = obj.GetDerEncoded(); } } catch (Exception e) { throw new Exception( "Issuing distribution point extension value could not be read.", e); } // 5.2.4 (d) deltaSelect.MinCrlNumber = (completeCRLNumber == null) ? null : completeCRLNumber.Add(BigInteger.One); deltaSelect.IssuingDistributionPoint = idp; deltaSelect.IssuingDistributionPointEnabled = true; // 5.2.4 (c) deltaSelect.MaxBaseCrlNumber = completeCRLNumber; // find delta CRLs ISet temp = CrlUtilities.FindCrls(deltaSelect, paramsPKIX, currentDate); ISet result = new HashSet(); foreach (X509Crl crl in temp) { if (isDeltaCrl(crl)) { result.Add(crl); } } return result; }
private ISet LoadCrlEntries() { ISet entrySet = new HashSet(); IEnumerable certs = c.GetRevokedCertificateEnumeration(); X509Name previousCertificateIssuer = IssuerDN; foreach (CrlEntry entry in certs) { X509CrlEntry crlEntry = new X509CrlEntry(entry, isIndirect, previousCertificateIssuer); entrySet.Add(crlEntry); previousCertificateIssuer = crlEntry.GetCertificateIssuer(); } return entrySet; }
/// <summary> /// crl checking /// Return a Collection of all CRLs found in the X509Store's that are /// matching the crlSelect criteriums. /// </summary> /// <param name="crlSelect">a {@link X509CRLStoreSelector} object that will be used /// to select the CRLs</param> /// <param name="crlStores">a List containing only {@link org.bouncycastle.x509.X509Store /// X509Store} objects. These are used to search for CRLs</param> /// <returns>a Collection of all found {@link X509CRL X509CRL} objects. May be /// empty but never <code>null</code>. /// </returns> private ICollection FindCrls(X509CrlStoreSelector crlSelect, IList crlStores) { ISet crls = new HashSet(); Exception lastException = null; bool foundValidStore = false; foreach (IX509Store store in crlStores) { try { crls.AddAll(store.GetMatches(crlSelect)); foundValidStore = true; } catch (X509StoreException e) { lastException = new Exception("Exception searching in X.509 CRL store.", e); } } if (!foundValidStore && lastException != null) throw lastException; return crls; }
static IEnumerable<Org.BouncyCastle.X509.X509Certificate> BuildCertificateChainBC(byte[] primary, IEnumerable<byte[]> additional) { X509CertificateParser parser = new X509CertificateParser(); PkixCertPathBuilder builder = new PkixCertPathBuilder(); // Separate root from itermediate var intermediateCerts = new List<Org.BouncyCastle.X509.X509Certificate>(); HashSet rootCerts = new HashSet(); foreach (byte[] cert in additional) { var x509Cert = parser.ReadCertificate(cert); // Separate root and subordinate certificates if (x509Cert.IssuerDN.Equivalent(x509Cert.SubjectDN)) rootCerts.Add(new TrustAnchor(x509Cert, null)); else intermediateCerts.Add(x509Cert); } // Create chain for this certificate X509CertStoreSelector holder = new X509CertStoreSelector(); holder.Certificate = parser.ReadCertificate(primary); // WITHOUT THIS LINE BUILDER CANNOT BEGIN BUILDING THE CHAIN intermediateCerts.Add(holder.Certificate); PkixBuilderParameters builderParams = new PkixBuilderParameters(rootCerts, holder); builderParams.IsRevocationEnabled = false; X509CollectionStoreParameters intermediateStoreParameters = new X509CollectionStoreParameters(intermediateCerts); builderParams.AddStore(X509StoreFactory.Create( "Certificate/Collection", intermediateStoreParameters)); PkixCertPathBuilderResult result = builder.Build(builderParams); return result.CertPath.Certificates.Cast<Org.BouncyCastle.X509.X509Certificate>(); }
/** * Searches for a holder public key certificate and verifies its * certification path. * * @param attrCert the attribute certificate. * @param pkixParams The PKIX parameters. * @return The certificate path of the holder certificate. * @throws Exception if * <ul> * <li>no public key certificate can be found although holder * information is given by an entity name or a base certificate * ID</li> * <li>support classes cannot be created</li> * <li>no certification path for the public key certificate can * be built</li> * </ul> */ internal static PkixCertPath ProcessAttrCert1( IX509AttributeCertificate attrCert, PkixParameters pkixParams) { PkixCertPathBuilderResult result = null; // find holder PKCs ISet holderPKCs = new HashSet(); if (attrCert.Holder.GetIssuer() != null) { X509CertStoreSelector selector = new X509CertStoreSelector(); selector.SerialNumber = attrCert.Holder.SerialNumber; X509Name[] principals = attrCert.Holder.GetIssuer(); for (int i = 0; i < principals.Length; i++) { try { // if (principals[i] is X500Principal) { selector.Issuer = principals[i]; } holderPKCs.AddAll(PkixCertPathValidatorUtilities .FindCertificates(selector, pkixParams.GetStores())); } catch (Exception e) { throw new PkixCertPathValidatorException( "Public key certificate for attribute certificate cannot be searched.", e); } } if (holderPKCs.IsEmpty) { throw new PkixCertPathValidatorException( "Public key certificate specified in base certificate ID for attribute certificate cannot be found."); } } if (attrCert.Holder.GetEntityNames() != null) { X509CertStoreSelector selector = new X509CertStoreSelector(); X509Name[] principals = attrCert.Holder.GetEntityNames(); for (int i = 0; i < principals.Length; i++) { try { // if (principals[i] is X500Principal) { selector.Issuer = principals[i]; } holderPKCs.AddAll(PkixCertPathValidatorUtilities .FindCertificates(selector, pkixParams.GetStores())); } catch (Exception e) { throw new PkixCertPathValidatorException( "Public key certificate for attribute certificate cannot be searched.", e); } } if (holderPKCs.IsEmpty) { throw new PkixCertPathValidatorException( "Public key certificate specified in entity name for attribute certificate cannot be found."); } } // verify cert paths for PKCs PkixBuilderParameters parameters = (PkixBuilderParameters) PkixBuilderParameters.GetInstance(pkixParams); PkixCertPathValidatorException lastException = null; foreach (X509Certificate cert in holderPKCs) { X509CertStoreSelector selector = new X509CertStoreSelector(); selector.Certificate = cert; parameters.SetTargetConstraints(selector); PkixCertPathBuilder builder = new PkixCertPathBuilder(); try { result = builder.Build(PkixBuilderParameters.GetInstance(parameters)); } catch (PkixCertPathBuilderException e) { lastException = new PkixCertPathValidatorException( "Certification path for public key certificate of attribute certificate could not be build.", e); } } if (lastException != null) { throw lastException; } return result.CertPath; }
public virtual PkixCertPathValidatorResult Validate( PkixCertPath certPath, PkixParameters paramsPkix) { if (paramsPkix.GetTrustAnchors() == null) { throw new ArgumentException( @"trustAnchors is null, this is not allowed for certification path validation.", "parameters"); } // // 6.1.1 - inputs // // // (a) // IList certs = certPath.Certificates; int n = certs.Count; if (certs.Count == 0) throw new PkixCertPathValidatorException("Certification path is empty.", null, certPath, 0); // // (b) // // DateTime validDate = PkixCertPathValidatorUtilities.GetValidDate(paramsPkix); // // (c) // ISet userInitialPolicySet = paramsPkix.GetInitialPolicies(); // // (d) // TrustAnchor trust; try { trust = PkixCertPathValidatorUtilities.FindTrustAnchor( (X509Certificate)certs[certs.Count - 1], paramsPkix.GetTrustAnchors()); } catch (Exception e) { throw new PkixCertPathValidatorException(e.Message, e, certPath, certs.Count - 1); } if (trust == null) throw new PkixCertPathValidatorException("Trust anchor for certification path not found.", null, certPath, -1); // // (e), (f), (g) are part of the paramsPkix object. // IEnumerator certIter; int index = 0; int i; // Certificate for each interation of the validation loop // Signature information for each iteration of the validation loop // // 6.1.2 - setup // // // (a) // IList[] policyNodes = new IList[n + 1]; for (int j = 0; j < policyNodes.Length; j++) { policyNodes[j] = Platform.CreateArrayList(); } ISet policySet = new HashSet(); policySet.Add(Rfc3280CertPathUtilities.ANY_POLICY); PkixPolicyNode validPolicyTree = new PkixPolicyNode(Platform.CreateArrayList(), 0, policySet, null, new HashSet(), Rfc3280CertPathUtilities.ANY_POLICY, false); policyNodes[0].Add(validPolicyTree); // // (b) and (c) // PkixNameConstraintValidator nameConstraintValidator = new PkixNameConstraintValidator(); // (d) // int explicitPolicy; ISet acceptablePolicies = new HashSet(); if (paramsPkix.IsExplicitPolicyRequired) { explicitPolicy = 0; } else { explicitPolicy = n + 1; } // // (e) // int inhibitAnyPolicy; if (paramsPkix.IsAnyPolicyInhibited) { inhibitAnyPolicy = 0; } else { inhibitAnyPolicy = n + 1; } // // (f) // int policyMapping; if (paramsPkix.IsPolicyMappingInhibited) { policyMapping = 0; } else { policyMapping = n + 1; } // // (g), (h), (i), (j) // IAsymmetricKeyParameter workingPublicKey; X509Name workingIssuerName; X509Certificate sign = trust.TrustedCert; try { if (sign != null) { workingIssuerName = sign.SubjectDN; workingPublicKey = sign.GetPublicKey(); } else { workingIssuerName = new X509Name(trust.CAName); workingPublicKey = trust.CAPublicKey; } } catch (ArgumentException ex) { throw new PkixCertPathValidatorException("Subject of trust anchor could not be (re)encoded.", ex, certPath, -1); } AlgorithmIdentifier workingAlgId = null; try { workingAlgId = PkixCertPathValidatorUtilities.GetAlgorithmIdentifier(workingPublicKey); } catch (PkixCertPathValidatorException e) { throw new PkixCertPathValidatorException( "Algorithm identifier of public key of trust anchor could not be read.", e, certPath, -1); } // DerObjectIdentifier workingPublicKeyAlgorithm = workingAlgId.ObjectID; // Asn1Encodable workingPublicKeyParameters = workingAlgId.Parameters; // // (k) // int maxPathLength = n; // // 6.1.3 // X509CertStoreSelector certConstraints = paramsPkix.GetTargetCertConstraints(); if (certConstraints != null && !certConstraints.Match((X509Certificate)certs[0])) { throw new PkixCertPathValidatorException( "Target certificate in certification path does not match targetConstraints.", null, certPath, 0); } // // initialize CertPathChecker's // IList pathCheckers = paramsPkix.GetCertPathCheckers(); certIter = pathCheckers.GetEnumerator(); while (certIter.MoveNext()) { ((PkixCertPathChecker)certIter.Current).Init(false); } X509Certificate cert = null; for (index = certs.Count - 1; index >= 0; index--) { // try // { // // i as defined in the algorithm description // i = n - index; // // set certificate to be checked in this round // sign and workingPublicKey and workingIssuerName are set // at the end of the for loop and initialized the // first time from the TrustAnchor // cert = (X509Certificate)certs[index]; // // 6.1.3 // Rfc3280CertPathUtilities.ProcessCertA(certPath, paramsPkix, index, workingPublicKey, workingIssuerName, sign); Rfc3280CertPathUtilities.ProcessCertBC(certPath, index, nameConstraintValidator); validPolicyTree = Rfc3280CertPathUtilities.ProcessCertD(certPath, index, acceptablePolicies, validPolicyTree, policyNodes, inhibitAnyPolicy); validPolicyTree = Rfc3280CertPathUtilities.ProcessCertE(certPath, index, validPolicyTree); Rfc3280CertPathUtilities.ProcessCertF(certPath, index, validPolicyTree, explicitPolicy); // // 6.1.4 // if (i != n) { if (cert != null && cert.Version == 1) { throw new PkixCertPathValidatorException( "Version 1 certificates can't be used as CA ones.", null, certPath, index); } Rfc3280CertPathUtilities.PrepareNextCertA(certPath, index); validPolicyTree = Rfc3280CertPathUtilities.PrepareCertB(certPath, index, policyNodes, validPolicyTree, policyMapping); Rfc3280CertPathUtilities.PrepareNextCertG(certPath, index, nameConstraintValidator); // (h) explicitPolicy = Rfc3280CertPathUtilities.PrepareNextCertH1(certPath, index, explicitPolicy); policyMapping = Rfc3280CertPathUtilities.PrepareNextCertH2(certPath, index, policyMapping); inhibitAnyPolicy = Rfc3280CertPathUtilities.PrepareNextCertH3(certPath, index, inhibitAnyPolicy); // // (i) // explicitPolicy = Rfc3280CertPathUtilities.PrepareNextCertI1(certPath, index, explicitPolicy); policyMapping = Rfc3280CertPathUtilities.PrepareNextCertI2(certPath, index, policyMapping); // (j) inhibitAnyPolicy = Rfc3280CertPathUtilities.PrepareNextCertJ(certPath, index, inhibitAnyPolicy); // (k) Rfc3280CertPathUtilities.PrepareNextCertK(certPath, index); // (l) maxPathLength = Rfc3280CertPathUtilities.PrepareNextCertL(certPath, index, maxPathLength); // (m) maxPathLength = Rfc3280CertPathUtilities.PrepareNextCertM(certPath, index, maxPathLength); // (n) Rfc3280CertPathUtilities.PrepareNextCertN(certPath, index); ISet criticalExtensions1 = cert.GetCriticalExtensionOids(); if (criticalExtensions1 != null) { criticalExtensions1 = new HashSet(criticalExtensions1); // these extensions are handled by the algorithm criticalExtensions1.Remove(X509Extensions.KeyUsage.Id); criticalExtensions1.Remove(X509Extensions.CertificatePolicies.Id); criticalExtensions1.Remove(X509Extensions.PolicyMappings.Id); criticalExtensions1.Remove(X509Extensions.InhibitAnyPolicy.Id); criticalExtensions1.Remove(X509Extensions.IssuingDistributionPoint.Id); criticalExtensions1.Remove(X509Extensions.DeltaCrlIndicator.Id); criticalExtensions1.Remove(X509Extensions.PolicyConstraints.Id); criticalExtensions1.Remove(X509Extensions.BasicConstraints.Id); criticalExtensions1.Remove(X509Extensions.SubjectAlternativeName.Id); criticalExtensions1.Remove(X509Extensions.NameConstraints.Id); } else { criticalExtensions1 = new HashSet(); } // (o) Rfc3280CertPathUtilities.PrepareNextCertO(certPath, index, criticalExtensions1, pathCheckers); // set signing certificate for next round sign = cert; // (c) workingIssuerName = sign.SubjectDN; // (d) try { workingPublicKey = PkixCertPathValidatorUtilities.GetNextWorkingKey(certPath.Certificates, index); } catch (PkixCertPathValidatorException e) { throw new PkixCertPathValidatorException("Next working key could not be retrieved.", e, certPath, index); } workingAlgId = PkixCertPathValidatorUtilities.GetAlgorithmIdentifier(workingPublicKey); // (f) // workingPublicKeyAlgorithm = workingAlgId.ObjectID; // (e) // workingPublicKeyParameters = workingAlgId.Parameters; } } // // 6.1.5 Wrap-up procedure // explicitPolicy = Rfc3280CertPathUtilities.WrapupCertA(explicitPolicy, cert); explicitPolicy = Rfc3280CertPathUtilities.WrapupCertB(certPath, index + 1, explicitPolicy); // // (c) (d) and (e) are already done // // // (f) // ISet criticalExtensions = cert.GetCriticalExtensionOids(); if (criticalExtensions != null) { criticalExtensions = new HashSet(criticalExtensions); // Requires .Id // these extensions are handled by the algorithm criticalExtensions.Remove(X509Extensions.KeyUsage.Id); criticalExtensions.Remove(X509Extensions.CertificatePolicies.Id); criticalExtensions.Remove(X509Extensions.PolicyMappings.Id); criticalExtensions.Remove(X509Extensions.InhibitAnyPolicy.Id); criticalExtensions.Remove(X509Extensions.IssuingDistributionPoint.Id); criticalExtensions.Remove(X509Extensions.DeltaCrlIndicator.Id); criticalExtensions.Remove(X509Extensions.PolicyConstraints.Id); criticalExtensions.Remove(X509Extensions.BasicConstraints.Id); criticalExtensions.Remove(X509Extensions.SubjectAlternativeName.Id); criticalExtensions.Remove(X509Extensions.NameConstraints.Id); criticalExtensions.Remove(X509Extensions.CrlDistributionPoints.Id); } else { criticalExtensions = new HashSet(); } Rfc3280CertPathUtilities.WrapupCertF(certPath, index + 1, pathCheckers, criticalExtensions); PkixPolicyNode intersection = Rfc3280CertPathUtilities.WrapupCertG(certPath, paramsPkix, userInitialPolicySet, index + 1, policyNodes, validPolicyTree, acceptablePolicies); if ((explicitPolicy > 0) || (intersection != null)) { return new PkixCertPathValidatorResult(trust, intersection, cert.GetPublicKey()); } throw new PkixCertPathValidatorException("Path processing failed on policy.", null, certPath, index); }
internal static PkixPolicyNode PrepareCertB( PkixCertPath certPath, int index, IList[] policyNodes, PkixPolicyNode validPolicyTree, int policyMapping) //throws CertPathValidatorException { IList certs = certPath.Certificates; X509Certificate cert = (X509Certificate)certs[index]; int n = certs.Count; // i as defined in the algorithm description int i = n - index; // (b) // Asn1Sequence pm = null; try { pm = (Asn1Sequence)Asn1Sequence.GetInstance(PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.PolicyMappings)); } catch (Exception ex) { throw new PkixCertPathValidatorException( "Policy mappings extension could not be decoded.", ex, certPath, index); } PkixPolicyNode _validPolicyTree = validPolicyTree; if (pm != null) { Asn1Sequence mappings = (Asn1Sequence)pm; IDictionary m_idp = Platform.CreateHashtable(); ISet s_idp = new HashSet(); for (int j = 0; j < mappings.Count; j++) { Asn1Sequence mapping = (Asn1Sequence) mappings[j]; string id_p = ((DerObjectIdentifier) mapping[0]).Id; string sd_p = ((DerObjectIdentifier) mapping[1]).Id; ISet tmp; if (!m_idp.Contains(id_p)) { tmp = new HashSet(); tmp.Add(sd_p); m_idp[id_p] = tmp; s_idp.Add(id_p); } else { tmp = (ISet)m_idp[id_p]; tmp.Add(sd_p); } } IEnumerator it_idp = s_idp.GetEnumerator(); while (it_idp.MoveNext()) { string id_p = (string)it_idp.Current; // // (1) // if (policyMapping > 0) { bool idp_found = false; IEnumerator nodes_i = policyNodes[i].GetEnumerator(); while (nodes_i.MoveNext()) { PkixPolicyNode node = (PkixPolicyNode)nodes_i.Current; if (node.ValidPolicy.Equals(id_p)) { idp_found = true; node.ExpectedPolicies = (ISet)m_idp[id_p]; break; } } if (!idp_found) { nodes_i = policyNodes[i].GetEnumerator(); while (nodes_i.MoveNext()) { PkixPolicyNode node = (PkixPolicyNode)nodes_i.Current; if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(node.ValidPolicy)) { ISet pq = null; Asn1Sequence policies = null; try { policies = (Asn1Sequence)PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.CertificatePolicies); } catch (Exception e) { throw new PkixCertPathValidatorException( "Certificate policies extension could not be decoded.", e, certPath, index); } foreach (Asn1Encodable ae in policies) { PolicyInformation pinfo = null; try { pinfo = PolicyInformation.GetInstance(ae.ToAsn1Object()); } catch (Exception ex) { throw new PkixCertPathValidatorException( "Policy information could not be decoded.", ex, certPath, index); } if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(pinfo.PolicyIdentifier.Id)) { try { pq = PkixCertPathValidatorUtilities .GetQualifierSet(pinfo.PolicyQualifiers); } catch (PkixCertPathValidatorException ex) { throw new PkixCertPathValidatorException( "Policy qualifier info set could not be decoded.", ex, certPath, index); } break; } } bool ci = false; ISet critExtOids = cert.GetCriticalExtensionOids(); if (critExtOids != null) { ci = critExtOids.Contains(X509Extensions.CertificatePolicies.Id); } PkixPolicyNode p_node = (PkixPolicyNode)node.Parent; if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(p_node.ValidPolicy)) { PkixPolicyNode c_node = new PkixPolicyNode(Platform.CreateArrayList(), i, (ISet)m_idp[id_p], p_node, pq, id_p, ci); p_node.AddChild(c_node); policyNodes[i].Add(c_node); } break; } } } // // (2) // } else if (policyMapping <= 0) { foreach (PkixPolicyNode node in Platform.CreateArrayList(policyNodes[i])) { if (node.ValidPolicy.Equals(id_p)) { node.Parent.RemoveChild(node); for (int k = i - 1; k >= 0; k--) { foreach (PkixPolicyNode node2 in Platform.CreateArrayList(policyNodes[k])) { if (!node2.HasChildren) { _validPolicyTree = PkixCertPathValidatorUtilities.RemovePolicyNode( _validPolicyTree, policyNodes, node2); if (_validPolicyTree == null) break; } } } } } } } } return _validPolicyTree; }
internal static bool ProcessCertD1i( int index, IList[] policyNodes, DerObjectIdentifier pOid, ISet pq) { IList policyNodeVec = policyNodes[index - 1]; for (int j = 0; j < policyNodeVec.Count; j++) { PkixPolicyNode node = (PkixPolicyNode)policyNodeVec[j]; ISet expectedPolicies = node.ExpectedPolicies; if (expectedPolicies.Contains(pOid.Id)) { ISet childExpectedPolicies = new HashSet(); childExpectedPolicies.Add(pOid.Id); PkixPolicyNode child = new PkixPolicyNode(Platform.CreateArrayList(), index, childExpectedPolicies, node, pq, pOid.Id, false); node.AddChild(child); policyNodes[index].Add(child); return true; } } return false; }
internal static ISet ProcessCrlA1i( DateTime currentDate, PkixParameters paramsPKIX, X509Certificate cert, X509Crl crl) { ISet deltaSet = new HashSet(); if (paramsPKIX.IsUseDeltasEnabled) { CrlDistPoint freshestCRL = null; try { freshestCRL = CrlDistPoint.GetInstance( PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.FreshestCrl)); } catch (Exception e) { throw new Exception("Freshest CRL extension could not be decoded from certificate.", e); } if (freshestCRL == null) { try { freshestCRL = CrlDistPoint.GetInstance(PkixCertPathValidatorUtilities.GetExtensionValue(crl, X509Extensions.FreshestCrl)); } catch (Exception e) { throw new Exception("Freshest CRL extension could not be decoded from CRL.", e); } } if (freshestCRL != null) { try { PkixCertPathValidatorUtilities.AddAdditionalStoresFromCrlDistributionPoint(freshestCRL, paramsPKIX); } catch (Exception e) { throw new Exception( "No new delta CRL locations could be added from Freshest CRL extension.", e); } // get delta CRL(s) try { deltaSet.AddAll(PkixCertPathValidatorUtilities.GetDeltaCrls(currentDate, paramsPKIX, crl)); } catch (Exception e) { throw new Exception("Exception obtaining delta CRLs.", e); } } } return deltaSet; }
internal static void ProcessCertD1ii( int index, IList[] policyNodes, DerObjectIdentifier _poid, ISet _pq) { IList policyNodeVec = policyNodes[index - 1]; for (int j = 0; j < policyNodeVec.Count; j++) { PkixPolicyNode _node = (PkixPolicyNode)policyNodeVec[j]; if (ANY_POLICY.Equals(_node.ValidPolicy)) { ISet _childExpectedPolicies = new HashSet(); _childExpectedPolicies.Add(_poid.Id); PkixPolicyNode _child = new PkixPolicyNode(Platform.CreateArrayList(), index, _childExpectedPolicies, _node, _pq, _poid.Id, false); _node.AddChild(_child); policyNodes[index].Add(_child); return; } } }
internal static PkixPolicyNode ProcessCertD( PkixCertPath certPath, int index, ISet acceptablePolicies, PkixPolicyNode validPolicyTree, IList[] policyNodes, int inhibitAnyPolicy) //throws CertPathValidatorException { IList certs = certPath.Certificates; X509Certificate cert = (X509Certificate)certs[index]; int n = certs.Count; // i as defined in the algorithm description int i = n - index; // // (d) policy Information checking against initial policy and // policy mapping // Asn1Sequence certPolicies = null; try { certPolicies = DerSequence.GetInstance( PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.CertificatePolicies)); } catch (Exception e) { throw new PkixCertPathValidatorException( "Could not read certificate policies extension from certificate.", e, certPath, index); } if (certPolicies != null && validPolicyTree != null) { // // (d) (1) // ISet pols = new HashSet(); foreach (Asn1Encodable ae in certPolicies) { PolicyInformation pInfo = PolicyInformation.GetInstance(ae.ToAsn1Object()); DerObjectIdentifier pOid = pInfo.PolicyIdentifier; pols.Add(pOid.Id); if (!Rfc3280CertPathUtilities.ANY_POLICY.Equals(pOid.Id)) { ISet pq = null; try { pq = PkixCertPathValidatorUtilities.GetQualifierSet(pInfo.PolicyQualifiers); } catch (PkixCertPathValidatorException ex) { throw new PkixCertPathValidatorException( "Policy qualifier info set could not be build.", ex, certPath, index); } bool match = PkixCertPathValidatorUtilities.ProcessCertD1i(i, policyNodes, pOid, pq); if (!match) { PkixCertPathValidatorUtilities.ProcessCertD1ii(i, policyNodes, pOid, pq); } } } if (acceptablePolicies.IsEmpty || acceptablePolicies.Contains(Rfc3280CertPathUtilities.ANY_POLICY)) { acceptablePolicies.Clear(); acceptablePolicies.AddAll(pols); } else { ISet t1 = new HashSet(); foreach (object o in acceptablePolicies) { if (pols.Contains(o)) { t1.Add(o); } } acceptablePolicies.Clear(); acceptablePolicies.AddAll(t1); } // // (d) (2) // if ((inhibitAnyPolicy > 0) || ((i < n) && PkixCertPathValidatorUtilities.IsSelfIssued(cert))) { foreach (Asn1Encodable ae in certPolicies) { PolicyInformation pInfo = PolicyInformation.GetInstance(ae.ToAsn1Object()); if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(pInfo.PolicyIdentifier.Id)) { ISet _apq = PkixCertPathValidatorUtilities.GetQualifierSet(pInfo.PolicyQualifiers); IList _nodes = policyNodes[i - 1]; for (int k = 0; k < _nodes.Count; k++) { PkixPolicyNode _node = (PkixPolicyNode)_nodes[k]; IEnumerator _policySetIter = _node.ExpectedPolicies.GetEnumerator(); while (_policySetIter.MoveNext()) { object _tmp = _policySetIter.Current; string _policy; if (_tmp is string) { _policy = (string)_tmp; } else if (_tmp is DerObjectIdentifier) { _policy = ((DerObjectIdentifier)_tmp).Id; } else { continue; } bool _found = false; foreach (PkixPolicyNode _child in _node.Children) { if (_policy.Equals(_child.ValidPolicy)) { _found = true; } } if (!_found) { ISet _newChildExpectedPolicies = new HashSet(); _newChildExpectedPolicies.Add(_policy); PkixPolicyNode _newChild = new PkixPolicyNode(Platform.CreateArrayList(), i, _newChildExpectedPolicies, _node, _apq, _policy, false); _node.AddChild(_newChild); policyNodes[i].Add(_newChild); } } } break; } } } PkixPolicyNode _validPolicyTree = validPolicyTree; // // (d) (3) // for (int j = (i - 1); j >= 0; j--) { IList nodes = policyNodes[j]; for (int k = 0; k < nodes.Count; k++) { PkixPolicyNode node = (PkixPolicyNode)nodes[k]; if (!node.HasChildren) { _validPolicyTree = PkixCertPathValidatorUtilities.RemovePolicyNode(_validPolicyTree, policyNodes, node); if (_validPolicyTree == null) { break; } } } } // // d (4) // ISet criticalExtensionOids = cert.GetCriticalExtensionOids(); if (criticalExtensionOids != null) { bool critical = criticalExtensionOids.Contains(X509Extensions.CertificatePolicies.Id); IList nodes = policyNodes[i]; for (int j = 0; j < nodes.Count; j++) { PkixPolicyNode node = (PkixPolicyNode)nodes[j]; node.IsCritical = critical; } } return _validPolicyTree; } return null; }
/** * Find the issuer certificates of a given certificate. * * @param cert * The certificate for which an issuer should be found. * @param pkixParams * @return A <code>Collection</code> object containing the issuer * <code>X509Certificate</code>s. Never <code>null</code>. * * @exception Exception * if an error occurs. */ internal static ICollection FindIssuerCerts( X509Certificate cert, PkixBuilderParameters pkixParams) { X509CertStoreSelector certSelect = new X509CertStoreSelector(); ISet certs = new HashSet(); try { certSelect.Subject = cert.IssuerDN; } catch (IOException ex) { throw new Exception( "Subject criteria for certificate selector to find issuer certificate could not be set.", ex); } try { certs.AddAll(PkixCertPathValidatorUtilities.FindCertificates(certSelect, pkixParams.GetStores())); certs.AddAll(PkixCertPathValidatorUtilities.FindCertificates(certSelect, pkixParams.GetAdditionalStores())); } catch (Exception e) { throw new Exception("Issuer certificate cannot be searched.", e); } return certs; }
/** * Checks a distribution point for revocation information for the * certificate <code>cert</code>. * * @param dp The distribution point to consider. * @param paramsPKIX PKIX parameters. * @param cert Certificate to check if it is revoked. * @param validDate The date when the certificate revocation status should be * checked. * @param defaultCRLSignCert The issuer certificate of the certificate <code>cert</code>. * @param defaultCRLSignKey The public key of the issuer certificate * <code>defaultCRLSignCert</code>. * @param certStatus The current certificate revocation status. * @param reasonMask The reasons mask which is already checked. * @param certPathCerts The certificates of the certification path. * @throws AnnotatedException if the certificate is revoked or the status cannot be checked * or some error occurs. */ private static void CheckCrl( DistributionPoint dp, PkixParameters paramsPKIX, X509Certificate cert, DateTime validDate, X509Certificate defaultCRLSignCert, AsymmetricKeyParameter defaultCRLSignKey, CertStatus certStatus, ReasonsMask reasonMask, IList certPathCerts) //throws AnnotatedException { DateTime currentDate = DateTime.UtcNow; if (validDate.Ticks > currentDate.Ticks) { throw new Exception("Validation time is in future."); } // (a) /* * We always get timely valid CRLs, so there is no step (a) (1). * "locally cached" CRLs are assumed to be in getStore(), additional * CRLs must be enabled in the ExtendedPKIXParameters and are in * getAdditionalStore() */ ISet crls = PkixCertPathValidatorUtilities.GetCompleteCrls(dp, cert, currentDate, paramsPKIX); bool validCrlFound = false; Exception lastException = null; IEnumerator crl_iter = crls.GetEnumerator(); while (crl_iter.MoveNext() && certStatus.Status == CertStatus.Unrevoked && !reasonMask.IsAllReasons) { try { X509Crl crl = (X509Crl)crl_iter.Current; // (d) ReasonsMask interimReasonsMask = Rfc3280CertPathUtilities.ProcessCrlD(crl, dp); // (e) /* * The reasons mask is updated at the end, so only valid CRLs * can update it. If this CRL does not contain new reasons it * must be ignored. */ if (!interimReasonsMask.HasNewReasons(reasonMask)) { continue; } // (f) ISet keys = Rfc3280CertPathUtilities.ProcessCrlF(crl, cert, defaultCRLSignCert, defaultCRLSignKey, paramsPKIX, certPathCerts); // (g) AsymmetricKeyParameter key = Rfc3280CertPathUtilities.ProcessCrlG(crl, keys); X509Crl deltaCRL = null; if (paramsPKIX.IsUseDeltasEnabled) { // get delta CRLs ISet deltaCRLs = PkixCertPathValidatorUtilities.GetDeltaCrls(currentDate, paramsPKIX, crl); // we only want one valid delta CRL // (h) deltaCRL = Rfc3280CertPathUtilities.ProcessCrlH(deltaCRLs, key); } /* * CRL must be be valid at the current time, not the validation * time. If a certificate is revoked with reason keyCompromise, * cACompromise, it can be used for forgery, also for the past. * This reason may not be contained in older CRLs. */ /* * in the chain model signatures stay valid also after the * certificate has been expired, so they do not have to be in * the CRL validity time */ if (paramsPKIX.ValidityModel != PkixParameters.ChainValidityModel) { /* * if a certificate has expired, but was revoked, it is not * more in the CRL, so it would be regarded as valid if the * first check is not done */ if (cert.NotAfter.Ticks < crl.ThisUpdate.Ticks) { throw new Exception("No valid CRL for current time found."); } } Rfc3280CertPathUtilities.ProcessCrlB1(dp, cert, crl); // (b) (2) Rfc3280CertPathUtilities.ProcessCrlB2(dp, cert, crl); // (c) Rfc3280CertPathUtilities.ProcessCrlC(deltaCRL, crl, paramsPKIX); // (i) Rfc3280CertPathUtilities.ProcessCrlI(validDate, deltaCRL, cert, certStatus, paramsPKIX); // (j) Rfc3280CertPathUtilities.ProcessCrlJ(validDate, crl, cert, certStatus); // (k) if (certStatus.Status == CrlReason.RemoveFromCrl) { certStatus.Status = CertStatus.Unrevoked; } // update reasons mask reasonMask.AddReasons(interimReasonsMask); ISet criticalExtensions = crl.GetCriticalExtensionOids(); if (criticalExtensions != null) { criticalExtensions = new HashSet(criticalExtensions); criticalExtensions.Remove(X509Extensions.IssuingDistributionPoint.Id); criticalExtensions.Remove(X509Extensions.DeltaCrlIndicator.Id); if (!criticalExtensions.IsEmpty) throw new Exception("CRL contains unsupported critical extensions."); } if (deltaCRL != null) { criticalExtensions = deltaCRL.GetCriticalExtensionOids(); if (criticalExtensions != null) { criticalExtensions = new HashSet(criticalExtensions); criticalExtensions.Remove(X509Extensions.IssuingDistributionPoint.Id); criticalExtensions.Remove(X509Extensions.DeltaCrlIndicator.Id); if (!criticalExtensions.IsEmpty) throw new Exception("Delta CRL contains unsupported critical extension."); } } validCrlFound = true; } catch (Exception e) { lastException = e; } } if (!validCrlFound) { throw lastException; } }
// // policy checking // internal static ISet GetQualifierSet(Asn1Sequence qualifiers) { ISet pq = new HashSet(); if (qualifiers == null) { return pq; } foreach (Asn1Encodable ae in qualifiers) { try { // pq.Add(PolicyQualifierInfo.GetInstance(Asn1Object.FromByteArray(ae.GetEncoded()))); pq.Add(PolicyQualifierInfo.GetInstance(ae.ToAsn1Object())); } catch (IOException ex) { throw new PkixCertPathValidatorException("Policy qualifier info cannot be decoded.", ex); } } return pq; }
private void v0Test() { // create certificates and CRLs AsymmetricCipherKeyPair rootPair = TestUtilities.GenerateRsaKeyPair(); AsymmetricCipherKeyPair interPair = TestUtilities.GenerateRsaKeyPair(); AsymmetricCipherKeyPair endPair = TestUtilities.GenerateRsaKeyPair(); X509Certificate rootCert = TestUtilities.GenerateRootCert(rootPair); X509Certificate interCert = TestUtilities.GenerateIntermediateCert(interPair.Public, rootPair.Private, rootCert); X509Certificate endCert = TestUtilities.GenerateEndEntityCert(endPair.Public, interPair.Private, interCert); BigInteger revokedSerialNumber = BigInteger.Two; X509Crl rootCRL = TestUtilities.CreateCrl(rootCert, rootPair.Private, revokedSerialNumber); X509Crl interCRL = TestUtilities.CreateCrl(interCert, interPair.Private, revokedSerialNumber); // create CertStore to support path building IList certList = new ArrayList(); certList.Add(rootCert); certList.Add(interCert); certList.Add(endCert); IList crlList = new ArrayList(); crlList.Add(rootCRL); crlList.Add(interCRL); // CollectionCertStoreParameters parameters = new CollectionCertStoreParameters(list); // CertStore store = CertStore.getInstance("Collection", parameters); IX509Store x509CertStore = X509StoreFactory.Create( "Certificate/Collection", new X509CollectionStoreParameters(certList)); IX509Store x509CrlStore = X509StoreFactory.Create( "CRL/Collection", new X509CollectionStoreParameters(crlList)); ISet trust = new HashSet(); trust.Add(new TrustAnchor(rootCert, null)); // build the path // CertPathBuilder builder = CertPathBuilder.getInstance("PKIX", "BC"); PkixCertPathBuilder builder = new PkixCertPathBuilder(); X509CertStoreSelector pathConstraints = new X509CertStoreSelector(); pathConstraints.Subject = endCert.SubjectDN; PkixBuilderParameters buildParams = new PkixBuilderParameters(trust, pathConstraints); // buildParams.addCertStore(store); buildParams.AddStore(x509CertStore); buildParams.AddStore(x509CrlStore); buildParams.Date = new DateTimeObject(DateTime.UtcNow); PkixCertPathBuilderResult result = builder.Build(buildParams); PkixCertPath path = result.CertPath; if (path.Certificates.Count != 2) { Fail("wrong number of certs in v0Test path"); } }
/** * Fetches complete CRLs according to RFC 3280. * * @param dp The distribution point for which the complete CRL * @param cert The <code>X509Certificate</code> or * {@link org.bouncycastle.x509.X509AttributeCertificate} for * which the CRL should be searched. * @param currentDate The date for which the delta CRLs must be valid. * @param paramsPKIX The extended PKIX parameters. * @return A <code>Set</code> of <code>X509CRL</code>s with complete * CRLs. * @throws Exception if an exception occurs while picking the CRLs * or no CRLs are found. */ internal static ISet GetCompleteCrls( DistributionPoint dp, object cert, DateTime currentDate, PkixParameters paramsPKIX) { X509CrlStoreSelector crlselect = new X509CrlStoreSelector(); try { ISet issuers = new HashSet(); if (cert is X509V2AttributeCertificate) { issuers.Add(((X509V2AttributeCertificate)cert) .Issuer.GetPrincipals()[0]); } else { issuers.Add(GetIssuerPrincipal(cert)); } PkixCertPathValidatorUtilities.GetCrlIssuersFromDistributionPoint(dp, issuers, crlselect, paramsPKIX); } catch (Exception e) { throw new Exception("Could not get issuer information from distribution point.", e); } if (cert is X509Certificate) { crlselect.CertificateChecking = (X509Certificate)cert; } else if (cert is X509V2AttributeCertificate) { crlselect.AttrCertChecking = (IX509AttributeCertificate)cert; } crlselect.CompleteCrlEnabled = true; ISet crls = CrlUtilities.FindCrls(crlselect, paramsPKIX, currentDate); if (crls.IsEmpty) { if (cert is IX509AttributeCertificate) { IX509AttributeCertificate aCert = (IX509AttributeCertificate)cert; throw new Exception("No CRLs found for issuer \"" + aCert.Issuer.GetPrincipals()[0] + "\""); } else { X509Certificate xCert = (X509Certificate)cert; throw new Exception("No CRLs found for issuer \"" + xCert.IssuerDN + "\""); } } return crls; }