Java tutorial
package org.bouncycastle.jce.provider; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.math.BigInteger; import java.security.GeneralSecurityException; import java.security.NoSuchProviderException; import java.security.NoSuchAlgorithmException; import java.security.SignatureException; import java.security.InvalidKeyException; import java.security.KeyFactory; import java.security.PublicKey; import java.security.cert.CRLException; import org.bouncycastle.jce.cert.CertPath; import org.bouncycastle.jce.cert.CertPathValidatorException; import org.bouncycastle.jce.cert.CertStore; import org.bouncycastle.jce.cert.CertStoreException; import java.security.cert.Certificate; import java.security.cert.CertificateException; import java.security.cert.CertificateParsingException; import org.bouncycastle.jce.cert.PKIXParameters; import org.bouncycastle.jce.cert.PolicyQualifierInfo; import org.bouncycastle.jce.cert.TrustAnchor; import java.security.cert.X509CRL; import java.security.cert.X509CRLEntry; import org.bouncycastle.jce.cert.X509CRLSelector; import org.bouncycastle.jce.cert.X509CertSelector; import java.security.cert.X509Certificate; import java.security.interfaces.DSAParams; import java.security.interfaces.DSAPublicKey; import java.security.spec.DSAPublicKeySpec; import java.text.ParseException; import java.util.ArrayList; import java.util.Collection; import java.util.Collections; import java.util.Date; import java.util.Enumeration; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Set; import org.bouncycastle.asn1.ASN1Encodable; import org.bouncycastle.asn1.ASN1Enumerated; import org.bouncycastle.asn1.ASN1GeneralizedTime; import org.bouncycastle.asn1.ASN1InputStream; import org.bouncycastle.asn1.ASN1Integer; import org.bouncycastle.asn1.ASN1ObjectIdentifier; import org.bouncycastle.asn1.ASN1OctetString; import org.bouncycastle.asn1.ASN1OutputStream; import org.bouncycastle.asn1.ASN1Primitive; import org.bouncycastle.asn1.ASN1Sequence; import org.bouncycastle.asn1.DERSequence; import org.bouncycastle.asn1.DEROctetString; import org.bouncycastle.asn1.isismtt.ISISMTTObjectIdentifiers; import org.bouncycastle.asn1.x500.X500Name; import org.bouncycastle.asn1.x500.style.RFC4519Style; import org.bouncycastle.asn1.x509.AlgorithmIdentifier; import org.bouncycastle.asn1.x509.AuthorityKeyIdentifier; import org.bouncycastle.asn1.x509.CertificateList; import org.bouncycastle.asn1.x509.CRLDistPoint; import org.bouncycastle.asn1.x509.CRLReason; import org.bouncycastle.asn1.x509.DistributionPoint; import org.bouncycastle.asn1.x509.DistributionPointName; import org.bouncycastle.asn1.x509.Extension; import org.bouncycastle.asn1.x509.GeneralName; import org.bouncycastle.asn1.x509.GeneralNames; import org.bouncycastle.asn1.x509.PolicyInformation; import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo; import org.bouncycastle.jcajce.PKIXCRLStore; import org.bouncycastle.jcajce.PKIXCRLStoreSelector; import org.bouncycastle.jcajce.PKIXCertStore; import org.bouncycastle.jcajce.PKIXCertStoreSelector; import org.bouncycastle.jcajce.PKIXExtendedParameters; import org.bouncycastle.jcajce.util.JcaJceHelper; import org.bouncycastle.jce.exception.ExtCertPathValidatorException; import org.bouncycastle.jce.X509Principal; import org.bouncycastle.util.Selector; import org.bouncycastle.util.Store; import org.bouncycastle.util.StoreException; import org.bouncycastle.x509.X509AttributeCertificate; class CertPathValidatorUtilities { protected static final PKIXCRLUtil CRL_UTIL = new PKIXCRLUtil(); protected static final String CERTIFICATE_POLICIES = Extension.certificatePolicies.getId(); protected static final String BASIC_CONSTRAINTS = Extension.basicConstraints.getId(); protected static final String POLICY_MAPPINGS = Extension.policyMappings.getId(); protected static final String SUBJECT_ALTERNATIVE_NAME = Extension.subjectAlternativeName.getId(); protected static final String NAME_CONSTRAINTS = Extension.nameConstraints.getId(); protected static final String KEY_USAGE = Extension.keyUsage.getId(); protected static final String INHIBIT_ANY_POLICY = Extension.inhibitAnyPolicy.getId(); protected static final String ISSUING_DISTRIBUTION_POINT = Extension.issuingDistributionPoint.getId(); protected static final String DELTA_CRL_INDICATOR = Extension.deltaCRLIndicator.getId(); protected static final String POLICY_CONSTRAINTS = Extension.policyConstraints.getId(); protected static final String FRESHEST_CRL = Extension.freshestCRL.getId(); protected static final String CRL_DISTRIBUTION_POINTS = Extension.cRLDistributionPoints.getId(); protected static final String AUTHORITY_KEY_IDENTIFIER = Extension.authorityKeyIdentifier.getId(); protected static final String ANY_POLICY = "2.5.29.32.0"; protected static final String CRL_NUMBER = Extension.cRLNumber.getId(); /* * key usage bits */ protected static final int KEY_CERT_SIGN = 5; protected static final int CRL_SIGN = 6; protected static final String[] crlReasons = new String[] { "unspecified", "keyCompromise", "cACompromise", "affiliationChanged", "superseded", "cessationOfOperation", "certificateHold", "unknown", "removeFromCRL", "privilegeWithdrawn", "aACompromise" }; /** * Search the given Set of TrustAnchor's for one that is the * issuer of the given X509 certificate. Uses the default provider * for signature verification. * * @param cert the X509 certificate * @param trustAnchors a Set of TrustAnchor's * @return the <code>TrustAnchor</code> object if found or * <code>null</code> if not. * @throws AnnotatedException if a TrustAnchor was found but the signature verification * on the given certificate has thrown an exception. */ protected static TrustAnchor findTrustAnchor(X509Certificate cert, Set trustAnchors) throws AnnotatedException { return findTrustAnchor(cert, trustAnchors, null); } /** * Search the given Set of TrustAnchor's for one that is the * issuer of the given X509 certificate. Uses the specified * provider for signature verification, or the default provider * if null. * * @param cert the X509 certificate * @param trustAnchors a Set of TrustAnchor's * @param sigProvider the provider to use for signature verification * @return the <code>TrustAnchor</code> object if found or * <code>null</code> if not. * @throws AnnotatedException if a TrustAnchor was found but the signature verification * on the given certificate has thrown an exception. */ protected static TrustAnchor findTrustAnchor(X509Certificate cert, Set trustAnchors, String sigProvider) throws AnnotatedException { TrustAnchor trust = null; PublicKey trustPublicKey = null; Exception invalidKeyEx = null; X509CertSelector certSelectX509 = new X509CertSelector(); X500Name certIssuer = PrincipalUtils.getEncodedIssuerPrincipal(cert); try { certSelectX509.setSubject(certIssuer.getEncoded()); } catch (IOException ex) { throw new AnnotatedException("Cannot set subject search criteria for trust anchor.", ex); } Iterator iter = trustAnchors.iterator(); while (iter.hasNext() && trust == null) { trust = (TrustAnchor) iter.next(); if (trust.getTrustedCert() != null) { if (certSelectX509.match(trust.getTrustedCert())) { trustPublicKey = trust.getTrustedCert().getPublicKey(); } else { trust = null; } } else if (trust.getCAName() != null && trust.getCAPublicKey() != null) { try { X500Name caName = PrincipalUtils.getCA(trust); if (certIssuer.equals(caName)) { trustPublicKey = trust.getCAPublicKey(); } else { trust = null; } } catch (IllegalArgumentException ex) { trust = null; } } else { trust = null; } if (trustPublicKey != null) { try { verifyX509Certificate(cert, trustPublicKey, sigProvider); } catch (Exception ex) { invalidKeyEx = ex; trust = null; trustPublicKey = null; } } } if (trust == null && invalidKeyEx != null) { throw new AnnotatedException("TrustAnchor found but certificate validation failed.", invalidKeyEx); } return trust; } static boolean isIssuerTrustAnchor(X509Certificate cert, Set trustAnchors, String sigProvider) throws AnnotatedException { try { return findTrustAnchor(cert, trustAnchors, sigProvider) != null; } catch (Exception e) { return false; } } static List<PKIXCertStore> getAdditionalStoresFromAltNames(byte[] issuerAlternativeName, Map<GeneralName, PKIXCertStore> altNameCertStoreMap) throws CertificateParsingException { // if in the IssuerAltName extension an URI // is given, add an additional X.509 store if (issuerAlternativeName != null) { GeneralNames issuerAltName = GeneralNames .getInstance(ASN1OctetString.getInstance(issuerAlternativeName).getOctets()); GeneralName[] names = issuerAltName.getNames(); List stores = new ArrayList(); for (int i = 0; i != names.length; i++) { GeneralName altName = names[i]; PKIXCertStore altStore = (PKIXCertStore) altNameCertStoreMap.get(altName); if (altStore != null) { stores.add(altStore); } } return stores; } else { return Collections.EMPTY_LIST; } } protected static Date getValidDate(PKIXExtendedParameters paramsPKIX) { Date validDate = paramsPKIX.getDate(); if (validDate == null) { validDate = new Date(); } return validDate; } protected static boolean isSelfIssued(X509Certificate cert) { return cert.getSubjectDN().equals(cert.getIssuerDN()); } /** * Extract the value of the given extension, if it exists. * * @param ext The extension object. * @param oid The object identifier to obtain. * @throws AnnotatedException if the extension cannot be read. */ protected static ASN1Primitive getExtensionValue(java.security.cert.X509Extension ext, String oid) throws AnnotatedException { byte[] bytes = ext.getExtensionValue(oid); if (bytes == null) { return null; } return getObject(oid, bytes); } private static ASN1Primitive getObject(String oid, byte[] ext) throws AnnotatedException { try { ASN1InputStream aIn = new ASN1InputStream(ext); ASN1OctetString octs = (ASN1OctetString) aIn.readObject(); aIn = new ASN1InputStream(octs.getOctets()); return aIn.readObject(); } catch (Exception e) { throw new AnnotatedException("exception processing extension " + oid, e); } } protected static AlgorithmIdentifier getAlgorithmIdentifier(PublicKey key) throws CertPathValidatorException { try { ASN1InputStream aIn = new ASN1InputStream(key.getEncoded()); SubjectPublicKeyInfo info = SubjectPublicKeyInfo.getInstance(aIn.readObject()); return info.getAlgorithm(); } catch (Exception e) { throw new ExtCertPathValidatorException("Subject public key cannot be decoded.", e); } } // crl checking // // policy checking // protected static final Set getQualifierSet(ASN1Sequence qualifiers) throws CertPathValidatorException { Set pq = new HashSet(); if (qualifiers == null) { return pq; } ByteArrayOutputStream bOut = new ByteArrayOutputStream(); ASN1OutputStream aOut = new ASN1OutputStream(bOut); Enumeration e = qualifiers.getObjects(); while (e.hasMoreElements()) { try { aOut.writeObject((ASN1Encodable) e.nextElement()); pq.add(new PolicyQualifierInfo(bOut.toByteArray())); } catch (IOException ex) { throw new ExtCertPathValidatorException("Policy qualifier info cannot be decoded.", ex); } bOut.reset(); } return pq; } protected static PKIXPolicyNode removePolicyNode(PKIXPolicyNode validPolicyTree, List[] policyNodes, PKIXPolicyNode _node) { PKIXPolicyNode _parent = (PKIXPolicyNode) _node.getParent(); if (validPolicyTree == null) { return null; } if (_parent == null) { for (int j = 0; j < policyNodes.length; j++) { policyNodes[j] = new ArrayList(); } return null; } else { _parent.removeChild(_node); removePolicyNodeRecurse(policyNodes, _node); return validPolicyTree; } } private static void removePolicyNodeRecurse(List[] policyNodes, PKIXPolicyNode _node) { policyNodes[_node.getDepth()].remove(_node); if (_node.hasChildren()) { Iterator _iter = _node.getChildren(); while (_iter.hasNext()) { PKIXPolicyNode _child = (PKIXPolicyNode) _iter.next(); removePolicyNodeRecurse(policyNodes, _child); } } } protected static boolean processCertD1i(int index, List[] policyNodes, ASN1ObjectIdentifier pOid, Set pq) { List policyNodeVec = policyNodes[index - 1]; for (int j = 0; j < policyNodeVec.size(); j++) { PKIXPolicyNode node = (PKIXPolicyNode) policyNodeVec.get(j); Set expectedPolicies = node.getExpectedPolicies(); if (expectedPolicies.contains(pOid.getId())) { Set childExpectedPolicies = new HashSet(); childExpectedPolicies.add(pOid.getId()); PKIXPolicyNode child = new PKIXPolicyNode(new ArrayList(), index, childExpectedPolicies, node, pq, pOid.getId(), false); node.addChild(child); policyNodes[index].add(child); return true; } } return false; } protected static void processCertD1ii(int index, List[] policyNodes, ASN1ObjectIdentifier _poid, Set _pq) { List policyNodeVec = policyNodes[index - 1]; for (int j = 0; j < policyNodeVec.size(); j++) { PKIXPolicyNode _node = (PKIXPolicyNode) policyNodeVec.get(j); if (ANY_POLICY.equals(_node.getValidPolicy())) { Set _childExpectedPolicies = new HashSet(); _childExpectedPolicies.add(_poid.getId()); PKIXPolicyNode _child = new PKIXPolicyNode(new ArrayList(), index, _childExpectedPolicies, _node, _pq, _poid.getId(), false); _node.addChild(_child); policyNodes[index].add(_child); return; } } } protected static void prepareNextCertB1(int i, List[] policyNodes, String id_p, Map m_idp, X509Certificate cert) throws AnnotatedException, CertPathValidatorException { boolean idp_found = false; Iterator nodes_i = policyNodes[i].iterator(); while (nodes_i.hasNext()) { PKIXPolicyNode node = (PKIXPolicyNode) nodes_i.next(); if (node.getValidPolicy().equals(id_p)) { idp_found = true; node.expectedPolicies = (Set) m_idp.get(id_p); break; } } if (!idp_found) { nodes_i = policyNodes[i].iterator(); while (nodes_i.hasNext()) { PKIXPolicyNode node = (PKIXPolicyNode) nodes_i.next(); if (ANY_POLICY.equals(node.getValidPolicy())) { Set pq = null; ASN1Sequence policies = null; try { policies = DERSequence.getInstance(getExtensionValue(cert, CERTIFICATE_POLICIES)); } catch (Exception e) { throw new AnnotatedException("Certificate policies cannot be decoded.", e); } Enumeration e = policies.getObjects(); while (e.hasMoreElements()) { PolicyInformation pinfo = null; try { pinfo = PolicyInformation.getInstance(e.nextElement()); } catch (Exception ex) { throw new AnnotatedException("Policy information cannot be decoded.", ex); } if (ANY_POLICY.equals(pinfo.getPolicyIdentifier().getId())) { try { pq = getQualifierSet(pinfo.getPolicyQualifiers()); } catch (CertPathValidatorException ex) { throw new ExtCertPathValidatorException( "Policy qualifier info set could not be built.", ex); } break; } } boolean ci = false; if (cert.getCriticalExtensionOIDs() != null) { ci = cert.getCriticalExtensionOIDs().contains(CERTIFICATE_POLICIES); } PKIXPolicyNode p_node = (PKIXPolicyNode) node.getParent(); if (ANY_POLICY.equals(p_node.getValidPolicy())) { PKIXPolicyNode c_node = new PKIXPolicyNode(new ArrayList(), i, (Set) m_idp.get(id_p), p_node, pq, id_p, ci); p_node.addChild(c_node); policyNodes[i].add(c_node); } break; } } } } protected static PKIXPolicyNode prepareNextCertB2(int i, List[] policyNodes, String id_p, PKIXPolicyNode validPolicyTree) { Iterator nodes_i = policyNodes[i].iterator(); while (nodes_i.hasNext()) { PKIXPolicyNode node = (PKIXPolicyNode) nodes_i.next(); if (node.getValidPolicy().equals(id_p)) { PKIXPolicyNode p_node = (PKIXPolicyNode) node.getParent(); p_node.removeChild(node); nodes_i.remove(); for (int k = (i - 1); k >= 0; k--) { List nodes = policyNodes[k]; for (int l = 0; l < nodes.size(); l++) { PKIXPolicyNode node2 = (PKIXPolicyNode) nodes.get(l); if (!node2.hasChildren()) { validPolicyTree = removePolicyNode(validPolicyTree, policyNodes, node2); if (validPolicyTree == null) { break; } } } } } } return validPolicyTree; } protected static boolean isAnyPolicy(Set policySet) { return policySet == null || policySet.contains(ANY_POLICY) || policySet.isEmpty(); } /** * Return a Collection of all certificates or attribute certificates found * in the X509Store's that are matching the certSelect criteriums. * * @param certSelect a {@link Selector} object that will be used to select * the certificates * @param certStores a List containing only {@link Store} objects. These * are used to search for certificates. * @return a Collection of all found {@link X509Certificate} * May be empty but never <code>null</code>. */ protected static Collection findCertificates(PKIXCertStoreSelector certSelect, List certStores) throws AnnotatedException { Set certs = new HashSet(); Iterator iter = certStores.iterator(); while (iter.hasNext()) { Object obj = iter.next(); if (obj instanceof Store) { Store certStore = (Store) obj; try { certs.addAll(certStore.getMatches(certSelect)); } catch (StoreException e) { throw new AnnotatedException("Problem while picking certificates from X.509 store.", e); } } else { CertStore certStore = (CertStore) obj; try { certs.addAll(PKIXCertStoreSelector.getCertificates(certSelect, certStore)); } catch (CertStoreException e) { throw new AnnotatedException("Problem while picking certificates from certificate store.", e); } } } return certs; } static List getAdditionalStoresFromCRLDistributionPoint(CRLDistPoint crldp, Map namedCRLStoreMap) throws AnnotatedException { if (crldp != null) { DistributionPoint dps[] = null; try { dps = crldp.getDistributionPoints(); } catch (Exception e) { throw new AnnotatedException("Distribution points could not be read.", e); } List stores = new ArrayList(); for (int i = 0; i < dps.length; i++) { DistributionPointName dpn = dps[i].getDistributionPoint(); // look for URIs in fullName if (dpn != null) { if (dpn.getType() == DistributionPointName.FULL_NAME) { GeneralName[] genNames = GeneralNames.getInstance(dpn.getName()).getNames(); for (int j = 0; j < genNames.length; j++) { PKIXCRLStore store = (PKIXCRLStore) namedCRLStoreMap.get(genNames[j]); if (store != null) { stores.add(store); } } } } } return stores; } else { return Collections.EMPTY_LIST; } } /** * Add the CRL issuers from the cRLIssuer field of the distribution point or * from the certificate if not given to the issuer criterion of the * <code>selector</code>. * <p> * The <code>issuerPrincipals</code> are a collection with a single * <code>X500Name</code> for <code>X509Certificate</code>s. * </p> * @param dp The distribution point. * @param issuerPrincipals The issuers of the certificate or attribute * certificate which contains the distribution point. * @param selector The CRL selector. * @throws AnnotatedException if an exception occurs while processing. * @throws ClassCastException if <code>issuerPrincipals</code> does not * contain only <code>X500Name</code>s. */ protected static void getCRLIssuersFromDistributionPoint(DistributionPoint dp, Collection issuerPrincipals, X509CRLSelector selector) throws AnnotatedException { List issuers = new ArrayList(); // indirect CRL if (dp.getCRLIssuer() != null) { GeneralName genNames[] = dp.getCRLIssuer().getNames(); // look for a DN for (int j = 0; j < genNames.length; j++) { if (genNames[j].getTagNo() == GeneralName.directoryName) { try { issuers.add(X500Name.getInstance(genNames[j].getName().toASN1Primitive().getEncoded())); } catch (IOException e) { throw new AnnotatedException( "CRL issuer information from distribution point cannot be decoded.", e); } } } } else { /* * certificate issuer is CRL issuer, distributionPoint field MUST be * present. */ if (dp.getDistributionPoint() == null) { throw new AnnotatedException( "CRL issuer is omitted from distribution point but no distributionPoint field present."); } // add and check issuer principals for (Iterator it = issuerPrincipals.iterator(); it.hasNext();) { issuers.add(it.next()); } } // TODO: is not found although this should correctly add the rel name. selector of Sun is buggy here or PKI test case is invalid // distributionPoint // if (dp.getDistributionPoint() != null) // { // // look for nameRelativeToCRLIssuer // if (dp.getDistributionPoint().getType() == DistributionPointName.NAME_RELATIVE_TO_CRL_ISSUER) // { // // append fragment to issuer, only one // // issuer can be there, if this is given // if (issuers.size() != 1) // { // throw new AnnotatedException( // "nameRelativeToCRLIssuer field is given but more than one CRL issuer is given."); // } // ASN1Encodable relName = dp.getDistributionPoint().getName(); // Iterator it = issuers.iterator(); // List issuersTemp = new ArrayList(issuers.size()); // while (it.hasNext()) // { // Enumeration e = null; // try // { // e = ASN1Sequence.getInstance( // new ASN1InputStream(((X500Principal) it.next()) // .getEncoded()).readObject()).getObjects(); // } // catch (IOException ex) // { // throw new AnnotatedException( // "Cannot decode CRL issuer information.", ex); // } // ASN1EncodableVector v = new ASN1EncodableVector(); // while (e.hasMoreElements()) // { // v.add((ASN1Encodable) e.nextElement()); // } // v.add(relName); // issuersTemp.add(new X500Principal(new DERSequence(v) // .getDEREncoded())); // } // issuers.clear(); // issuers.addAll(issuersTemp); // } // } Iterator it = issuers.iterator(); while (it.hasNext()) { try { selector.addIssuerName(((X500Name) it.next()).getEncoded()); } catch (IOException ex) { throw new AnnotatedException("Cannot decode CRL issuer information.", ex); } } } private static BigInteger getSerialNumber(Object cert) { return ((X509Certificate) cert).getSerialNumber(); } protected static void getCertStatus(Date validDate, X509CRL crl, Object cert, CertStatus certStatus) throws AnnotatedException { X509CRLEntry crl_entry = null; boolean isIndirect; try { isIndirect = X509CRLObject.isIndirectCRL(crl); } catch (CRLException exception) { throw new AnnotatedException("Failed check for indirect CRL.", exception); } if (isIndirect) { if (!(crl instanceof X509CRLObject)) { try { crl = new X509CRLObject(CertificateList.getInstance(crl.getEncoded())); } catch (CRLException exception) { throw new AnnotatedException("Failed to recode indirect CRL.", exception); } } crl_entry = crl.getRevokedCertificate(getSerialNumber(cert)); if (crl_entry == null) { return; } X509Principal cIssuer = ((X509CRLEntryObject) crl_entry).getCertificateIssuer(); X500Name certIssuer; if (cIssuer == null) { certIssuer = PrincipalUtils.getIssuerPrincipal(crl); } else { certIssuer = X500Name.getInstance(cIssuer.getEncoded()); } if (!PrincipalUtils.getEncodedIssuerPrincipal(cert).equals(certIssuer)) { return; } } else if (!PrincipalUtils.getEncodedIssuerPrincipal(cert).equals(PrincipalUtils.getIssuerPrincipal(crl))) { return; // not for our issuer, ignore } else { crl_entry = crl.getRevokedCertificate(getSerialNumber(cert)); if (crl_entry == null) { return; } } ASN1Enumerated reasonCode = null; if (crl_entry.hasExtensions()) { try { reasonCode = ASN1Enumerated.getInstance( CertPathValidatorUtilities.getExtensionValue(crl_entry, Extension.reasonCode.getId())); } catch (Exception e) { throw new AnnotatedException("Reason code CRL entry extension could not be decoded.", e); } } // for reason keyCompromise, caCompromise, aACompromise or // unspecified if (!(validDate.getTime() < crl_entry.getRevocationDate().getTime()) || reasonCode == null || reasonCode.getValue().intValue() == 0 || reasonCode.getValue().intValue() == 1 || reasonCode.getValue().intValue() == 2 || reasonCode.getValue().intValue() == 8) { // (i) or (j) (1) if (reasonCode != null) { certStatus.setCertStatus(reasonCode.getValue().intValue()); } // (i) or (j) (2) else { certStatus.setCertStatus(CRLReason.unspecified); } certStatus.setRevocationDate(crl_entry.getRevocationDate()); } } /** * Fetches delta CRLs according to RFC 3280 section 5.2.4. * * @param validityDate The date for which the delta CRLs must be valid. * @param completeCRL The complete CRL the delta CRL is for. * @return A <code>Set</code> of <code>X509CRL</code>s with delta CRLs. * @throws AnnotatedException if an exception occurs while picking the delta * CRLs. */ protected static Set getDeltaCRLs(Date validityDate, X509CRL completeCRL, List<CertStore> certStores, List<PKIXCRLStore> pkixCrlStores) throws AnnotatedException { X509CRLSelector baseDeltaSelect = new X509CRLSelector(); // 5.2.4 (a) try { baseDeltaSelect.addIssuerName(PrincipalUtils.getIssuerPrincipal(completeCRL).getEncoded()); } catch (IOException e) { throw new AnnotatedException("Cannot extract issuer from CRL.", e); } BigInteger completeCRLNumber = null; try { ASN1Primitive derObject = CertPathValidatorUtilities.getExtensionValue(completeCRL, CRL_NUMBER); if (derObject != null) { completeCRLNumber = ASN1Integer.getInstance(derObject).getPositiveValue(); } } catch (Exception e) { throw new AnnotatedException("CRL number extension could not be extracted from CRL.", e); } // 5.2.4 (b) byte[] idp = null; try { idp = completeCRL.getExtensionValue(ISSUING_DISTRIBUTION_POINT); } catch (Exception e) { throw new AnnotatedException("Issuing distribution point extension value could not be read.", e); } // 5.2.4 (d) baseDeltaSelect .setMinCRLNumber(completeCRLNumber == null ? null : completeCRLNumber.add(BigInteger.valueOf(1))); PKIXCRLStoreSelector.Builder selBuilder = new PKIXCRLStoreSelector.Builder(baseDeltaSelect); selBuilder.setIssuingDistributionPoint(idp); selBuilder.setIssuingDistributionPointEnabled(true); // 5.2.4 (c) selBuilder.setMaxBaseCRLNumber(completeCRLNumber); PKIXCRLStoreSelector deltaSelect = selBuilder.build(); // find delta CRLs Set temp = CRL_UTIL.findCRLs(deltaSelect, validityDate, certStores, pkixCrlStores); Set result = new HashSet(); for (Iterator it = temp.iterator(); it.hasNext();) { X509CRL crl = (X509CRL) it.next(); if (isDeltaCRL(crl)) { result.add(crl); } } return result; } private static boolean isDeltaCRL(X509CRL crl) { Set critical = crl.getCriticalExtensionOIDs(); if (critical == null) { return false; } return critical.contains(RFC3280CertPathUtilities.DELTA_CRL_INDICATOR); } /** * Fetches complete CRLs according to RFC 3280. * * @param dp The distribution point for which the complete CRL * @param cert The <code>X509Certificate</code> 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 AnnotatedException if an exception occurs while picking the CRLs * or no CRLs are found. */ protected static Set getCompleteCRLs(DistributionPoint dp, Object cert, Date currentDate, PKIXExtendedParameters paramsPKIX) throws AnnotatedException { X509CRLSelector baseCrlSelect = new X509CRLSelector(); try { Set issuers = new HashSet(); issuers.add(PrincipalUtils.getEncodedIssuerPrincipal(cert)); CertPathValidatorUtilities.getCRLIssuersFromDistributionPoint(dp, issuers, baseCrlSelect); } catch (AnnotatedException e) { throw new AnnotatedException("Could not get issuer information from distribution point.", e); } if (cert instanceof X509Certificate) { baseCrlSelect.setCertificateChecking((X509Certificate) cert); } PKIXCRLStoreSelector crlSelect = new PKIXCRLStoreSelector.Builder(baseCrlSelect).setCompleteCRLEnabled(true) .build(); Date validityDate = currentDate; if (paramsPKIX.getDate() != null) { validityDate = paramsPKIX.getDate(); } Set crls = CRL_UTIL.findCRLs(crlSelect, validityDate, paramsPKIX.getCertStores(), paramsPKIX.getCRLStores()); checkCRLsNotEmpty(crls, cert); return crls; } protected static Date getValidCertDateFromValidityModel(PKIXExtendedParameters paramsPKIX, CertPath certPath, int index) throws AnnotatedException { if (paramsPKIX.getValidityModel() == PKIXExtendedParameters.CHAIN_VALIDITY_MODEL) { // if end cert use given signing/encryption/... time if (index <= 0) { return CertPathValidatorUtilities.getValidDate(paramsPKIX); // else use time when previous cert was created } else { if (index - 1 == 0) { ASN1GeneralizedTime dateOfCertgen = null; try { byte[] extBytes = ((X509Certificate) certPath.getCertificates().get(index - 1)) .getExtensionValue(ISISMTTObjectIdentifiers.id_isismtt_at_dateOfCertGen.getId()); if (extBytes != null) { dateOfCertgen = ASN1GeneralizedTime.getInstance(ASN1Primitive.fromByteArray(extBytes)); } } catch (IOException e) { throw new AnnotatedException("Date of cert gen extension could not be read."); } catch (IllegalArgumentException e) { throw new AnnotatedException("Date of cert gen extension could not be read."); } if (dateOfCertgen != null) { try { return dateOfCertgen.getDate(); } catch (ParseException e) { throw new AnnotatedException( "Date from date of cert gen extension could not be parsed.", e); } } return ((X509Certificate) certPath.getCertificates().get(index - 1)).getNotBefore(); } else { return ((X509Certificate) certPath.getCertificates().get(index - 1)).getNotBefore(); } } } else { return getValidDate(paramsPKIX); } } /** * Return the next working key inheriting DSA parameters if necessary. * <p> * This methods inherits DSA parameters from the indexed certificate or * previous certificates in the certificate chain to the returned * <code>PublicKey</code>. The list is searched upwards, meaning the end * certificate is at position 0 and previous certificates are following. * </p> * <p> * If the indexed certificate does not contain a DSA key this method simply * returns the public key. If the DSA key already contains DSA parameters * the key is also only returned. * </p> * * @param certs The certification path. * @param index The index of the certificate which contains the public key * which should be extended with DSA parameters. * @return The public key of the certificate in list position * <code>index</code> extended with DSA parameters if applicable. * @throws AnnotatedException if DSA parameters cannot be inherited. */ protected static PublicKey getNextWorkingKey(List certs, int index, JcaJceHelper helper) throws CertPathValidatorException { Certificate cert = (Certificate) certs.get(index); PublicKey pubKey = cert.getPublicKey(); if (!(pubKey instanceof DSAPublicKey)) { return pubKey; } DSAPublicKey dsaPubKey = (DSAPublicKey) pubKey; if (dsaPubKey.getParams() != null) { return dsaPubKey; } for (int i = index + 1; i < certs.size(); i++) { X509Certificate parentCert = (X509Certificate) certs.get(i); pubKey = parentCert.getPublicKey(); if (!(pubKey instanceof DSAPublicKey)) { throw new CertPathValidatorException( "DSA parameters cannot be inherited from previous certificate."); } DSAPublicKey prevDSAPubKey = (DSAPublicKey) pubKey; if (prevDSAPubKey.getParams() == null) { continue; } DSAParams dsaParams = prevDSAPubKey.getParams(); DSAPublicKeySpec dsaPubKeySpec = new DSAPublicKeySpec(dsaPubKey.getY(), dsaParams.getP(), dsaParams.getQ(), dsaParams.getG()); try { KeyFactory keyFactory = helper.createKeyFactory("DSA"); return keyFactory.generatePublic(dsaPubKeySpec); } catch (Exception exception) { throw new RuntimeException(exception.getMessage()); } } throw new CertPathValidatorException("DSA parameters cannot be inherited from previous certificate."); } /** * Find the issuer certificates of a given certificate. * * @param cert The certificate for which an issuer should be found. * @return A <code>Collection</code> object containing the issuer * <code>X509Certificate</code>s. Never <code>null</code>. * @throws AnnotatedException if an error occurs. */ static Collection findIssuerCerts(X509Certificate cert, List<CertStore> certStores, List<PKIXCertStore> pkixCertStores) throws AnnotatedException { X509CertSelector selector = new X509CertSelector(); try { selector.setSubject(PrincipalUtils.getIssuerPrincipal(cert).getEncoded()); } catch (IOException e) { throw new AnnotatedException( "Subject criteria for certificate selector to find issuer certificate could not be set.", e); } try { byte[] akiExtensionValue = cert.getExtensionValue(AUTHORITY_KEY_IDENTIFIER); if (akiExtensionValue != null) { ASN1OctetString aki = ASN1OctetString.getInstance(akiExtensionValue); byte[] authorityKeyIdentifier = AuthorityKeyIdentifier.getInstance(aki.getOctets()) .getKeyIdentifier(); if (authorityKeyIdentifier != null) { selector.setSubjectKeyIdentifier(new DEROctetString(authorityKeyIdentifier).getEncoded()); } } } catch (Exception e) { // authority key identifier could not be retrieved from target cert, just search without it } PKIXCertStoreSelector certSelect = new PKIXCertStoreSelector.Builder(selector).build(); Set certs = new HashSet(); Iterator iter; try { List matches = new ArrayList(); matches.addAll(CertPathValidatorUtilities.findCertificates(certSelect, certStores)); matches.addAll(CertPathValidatorUtilities.findCertificates(certSelect, pkixCertStores)); iter = matches.iterator(); } catch (AnnotatedException e) { throw new AnnotatedException("Issuer certificate cannot be searched.", e); } X509Certificate issuer = null; while (iter.hasNext()) { issuer = (X509Certificate) iter.next(); // issuer cannot be verified because possible DSA inheritance // parameters are missing certs.add(issuer); } return certs; } protected static void verifyX509Certificate(X509Certificate cert, PublicKey publicKey, String sigProvider) throws NoSuchAlgorithmException, NoSuchProviderException, InvalidKeyException, SignatureException, CertificateException { if (sigProvider == null) { cert.verify(publicKey); } else { cert.verify(publicKey, sigProvider); } } static void checkCRLsNotEmpty(Set crls, Object cert) throws AnnotatedException { if (crls.isEmpty()) { if (cert instanceof X509AttributeCertificate) { X509AttributeCertificate aCert = (X509AttributeCertificate) cert; throw new AnnotatedException( "No CRLs found for issuer \"" + aCert.getIssuer().getPrincipals()[0] + "\""); } else { X509Certificate xCert = (X509Certificate) cert; throw new AnnotatedException("No CRLs found for issuer \"" + RFC4519Style.INSTANCE.toString(PrincipalUtils.getIssuerPrincipal(xCert)) + "\""); } } } }