/* * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.security.provider.certpath; import java.io.IOException; import java.security.PublicKey; import java.security.cert.CertificateException; import java.security.cert.CertPathValidatorException; import java.security.cert.PKIXCertPathChecker; import java.security.cert.X509Certificate; import java.security.interfaces.DSAPublicKey; import java.util.ArrayList; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.ListIterator; import javax.security.auth.x500.X500Principal; import sun.security.util.Debug; import sun.security.x509.SubjectAlternativeNameExtension; import sun.security.x509.GeneralNames; import sun.security.x509.GeneralName; import sun.security.x509.GeneralNameInterface; import sun.security.x509.X500Name; import sun.security.x509.X509CertImpl; /** * A specification of a forward PKIX validation state * which is initialized by each build and updated each time a * certificate is added to the current path. * @since 1.4 * @author Yassir Elley */ class ForwardState implements State { private static final Debug debug = Debug.getInstance("certpath"); /* The issuer DN of the last cert in the path */ X500Principal issuerDN; /* The last cert in the path */ X509CertImpl cert; /* The set of subjectDNs and subjectAltNames of all certs in the path */ HashSet subjectNamesTraversed; /* * The number of intermediate CA certs which have been traversed so * far in the path */ int traversedCACerts; /* Flag indicating if state is initial (path is just starting) */ private boolean init = true; /* the checker used for revocation status */ public CrlRevocationChecker crlChecker; /* The list of user-defined checkers that support forward checking */ ArrayList forwardCheckers; /* Flag indicating if key needing to inherit key parameters has been * encountered. */ boolean keyParamsNeededFlag = false; /** * Returns a boolean flag indicating if the state is initial * (just starting) * * @return boolean flag indicating if the state is initial (just starting) */ public boolean isInitial() { return init; } /** * Return boolean flag indicating whether a public key that needs to inherit * key parameters has been encountered. * * @return boolean true if key needing to inherit parameters has been * encountered; false otherwise. */ public boolean keyParamsNeeded() { return keyParamsNeededFlag; } /** * Display state for debugging purposes */ public String toString() { StringBuffer sb = new StringBuffer(); try { sb.append("State ["); sb.append("\n issuerDN of last cert: " + issuerDN); sb.append("\n traversedCACerts: " + traversedCACerts); sb.append("\n init: " + String.valueOf(init)); sb.append("\n keyParamsNeeded: " + String.valueOf(keyParamsNeededFlag)); sb.append("\n subjectNamesTraversed: \n" + subjectNamesTraversed); sb.append("]\n"); } catch (Exception e) { if (debug != null) { debug.println("ForwardState.toString() unexpected exception"); e.printStackTrace(); } } return sb.toString(); } /** * Initialize the state. * * @param certPathCheckers the list of user-defined PKIXCertPathCheckers */ public void initState(List certPathCheckers) throws CertPathValidatorException { subjectNamesTraversed = new HashSet(); traversedCACerts = 0; /* * Populate forwardCheckers with every user-defined checker * that supports forward checking and initialize the forwardCheckers */ forwardCheckers = new ArrayList(); if (certPathCheckers != null) { for (PKIXCertPathChecker checker : certPathCheckers) { if (checker.isForwardCheckingSupported()) { checker.init(true); forwardCheckers.add(checker); } } } init = true; } /** * Update the state with the next certificate added to the path. * * @param cert the certificate which is used to update the state */ public void updateState(X509Certificate cert) throws CertificateException, IOException, CertPathValidatorException { if (cert == null) return; X509CertImpl icert = X509CertImpl.toImpl(cert); /* see if certificate key has null parameters */ PublicKey newKey = icert.getPublicKey(); if (newKey instanceof DSAPublicKey && ((DSAPublicKey)newKey).getParams() == null) { keyParamsNeededFlag = true; } /* update certificate */ this.cert = icert; /* update issuer DN */ issuerDN = cert.getIssuerX500Principal(); if (!X509CertImpl.isSelfIssued(cert)) { /* * update traversedCACerts only if this is a non-self-issued * intermediate CA cert */ if (!init && cert.getBasicConstraints() != -1) { traversedCACerts++; } } /* update subjectNamesTraversed only if this is the EE cert or if this cert is not self-issued */ if (init || !X509CertImpl.isSelfIssued(cert)){ X500Principal subjName = cert.getSubjectX500Principal(); subjectNamesTraversed.add(X500Name.asX500Name(subjName)); try { SubjectAlternativeNameExtension subjAltNameExt = icert.getSubjectAlternativeNameExtension(); if (subjAltNameExt != null) { GeneralNames gNames = subjAltNameExt.get( SubjectAlternativeNameExtension.SUBJECT_NAME); for (Iterator t = gNames.iterator(); t.hasNext(); ) { GeneralNameInterface gName = t.next().getName(); subjectNamesTraversed.add(gName); } } } catch (Exception e) { if (debug != null) { debug.println("ForwardState.updateState() unexpected " + "exception"); e.printStackTrace(); } throw new CertPathValidatorException(e); } } init = false; } /* * Clone current state. The state is cloned as each cert is * added to the path. This is necessary if backtracking occurs, * and a prior state needs to be restored. * * Note that this is a SMART clone. Not all fields are fully copied, * because some of them will * not have their contents modified by subsequent calls to updateState. */ @SuppressWarnings("unchecked") // Safe casts assuming clone() works correctly public Object clone() { try { ForwardState clonedState = (ForwardState) super.clone(); /* clone checkers, if cloneable */ clonedState.forwardCheckers = forwardCheckers.clone(); ListIterator li = clonedState.forwardCheckers.listIterator(); while (li.hasNext()) { PKIXCertPathChecker checker = li.next(); if (checker instanceof Cloneable) { li.set((PKIXCertPathChecker)checker.clone()); } } /* * Shallow copy traversed names. There is no need to * deep copy contents, since the elements of the Set * are never modified by subsequent calls to updateState(). */ clonedState.subjectNamesTraversed = subjectNamesTraversed.clone(); return clonedState; } catch (CloneNotSupportedException e) { throw new InternalError(e.toString(), e); } } }