Showing the changes to java/pkg/sun/security/provider/certpath/KeyChecker.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2000, 2008, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package sun.security.provider.certpath; | |
| 27 | + | |
| 28 | +import java.util.*; | |
| 29 | +import java.security.cert.*; | |
| 30 | +import java.security.cert.PKIXReason; | |
| 31 | + | |
| 32 | +import sun.security.util.Debug; | |
| 33 | +import sun.security.x509.PKIXExtensions; | |
| 34 | + | |
| 35 | +/** | |
| 36 | + * KeyChecker is a <code>PKIXCertPathChecker</code> that checks that the | |
| 37 | + * keyCertSign bit is set in the keyUsage extension in an intermediate CA | |
| 38 | + * certificate. It also checks whether the final certificate in a | |
| 39 | + * certification path meets the specified target constraints specified as | |
| 40 | + * a CertSelector in the PKIXParameters passed to the CertPathValidator. | |
| 41 | + * | |
| 42 | + * @since 1.4 | |
| 43 | + * @author Yassir Elley | |
| 44 | + */ | |
| 45 | +class KeyChecker extends PKIXCertPathChecker { | |
| 46 | + | |
| 47 | + private static final Debug debug = Debug.getInstance("certpath"); | |
| 48 | + // the index of keyCertSign in the boolean KeyUsage array | |
| 49 | + private static final int keyCertSign = 5; | |
| 50 | + private final int certPathLen; | |
| 51 | + private CertSelector targetConstraints; | |
| 52 | + private int remainingCerts; | |
| 53 | + | |
| 54 | + private Set<String> supportedExts; | |
| 55 | + | |
| 56 | + /** | |
| 57 | + * Default Constructor | |
| 58 | + * | |
| 59 | + * @param certPathLen allowable cert path length | |
| 60 | + * @param targetCertSel a CertSelector object specifying the constraints | |
| 61 | + * on the target certificate | |
| 62 | + */ | |
| 63 | + KeyChecker(int certPathLen, CertSelector targetCertSel) | |
| 64 | + throws CertPathValidatorException | |
| 65 | + { | |
| 66 | + this.certPathLen = certPathLen; | |
| 67 | + this.targetConstraints = targetCertSel; | |
| 68 | + init(false); | |
| 69 | + } | |
| 70 | + | |
| 71 | + /** | |
| 72 | + * Initializes the internal state of the checker from parameters | |
| 73 | + * specified in the constructor | |
| 74 | + */ | |
| 75 | + public void init(boolean forward) throws CertPathValidatorException { | |
| 76 | + if (!forward) { | |
| 77 | + remainingCerts = certPathLen; | |
| 78 | + } else { | |
| 79 | + throw new CertPathValidatorException | |
| 80 | + ("forward checking not supported"); | |
| 81 | + } | |
| 82 | + } | |
| 83 | + | |
| 84 | + public final boolean isForwardCheckingSupported() { | |
| 85 | + return false; | |
| 86 | + } | |
| 87 | + | |
| 88 | + public Set<String> getSupportedExtensions() { | |
| 89 | + if (supportedExts == null) { | |
| 90 | + supportedExts = new HashSet<String>(); | |
| 91 | + supportedExts.add(PKIXExtensions.KeyUsage_Id.toString()); | |
| 92 | + supportedExts.add(PKIXExtensions.ExtendedKeyUsage_Id.toString()); | |
| 93 | + supportedExts.add(PKIXExtensions.SubjectAlternativeName_Id.toString()); | |
| 94 | + supportedExts = Collections.unmodifiableSet(supportedExts); | |
| 95 | + } | |
| 96 | + return supportedExts; | |
| 97 | + } | |
| 98 | + | |
| 99 | + /** | |
| 100 | + * Checks that keyUsage and target constraints are satisfied by | |
| 101 | + * the specified certificate. | |
| 102 | + * | |
| 103 | + * @param cert the Certificate | |
| 104 | + * @param unresolvedCritExts the unresolved critical extensions | |
| 105 | + * @exception CertPathValidatorException Exception thrown if certificate | |
| 106 | + * does not verify | |
| 107 | + */ | |
| 108 | + public void check(Certificate cert, Collection<String> unresCritExts) | |
| 109 | + throws CertPathValidatorException | |
| 110 | + { | |
| 111 | + X509Certificate currCert = (X509Certificate) cert; | |
| 112 | + | |
| 113 | + remainingCerts--; | |
| 114 | + | |
| 115 | + // if final certificate, check that target constraints are satisfied | |
| 116 | + if (remainingCerts == 0) { | |
| 117 | + if ((targetConstraints != null) && | |
| 118 | + (targetConstraints.match(currCert) == false)) { | |
| 119 | + throw new CertPathValidatorException("target certificate " + | |
| 120 | + "constraints check failed"); | |
| 121 | + } | |
| 122 | + } else { | |
| 123 | + // otherwise, verify that keyCertSign bit is set in CA certificate | |
| 124 | + verifyCAKeyUsage(currCert); | |
| 125 | + } | |
| 126 | + | |
| 127 | + // remove the extensions that we have checked | |
| 128 | + if (unresCritExts != null && !unresCritExts.isEmpty()) { | |
| 129 | + unresCritExts.remove(PKIXExtensions.KeyUsage_Id.toString()); | |
| 130 | + unresCritExts.remove(PKIXExtensions.ExtendedKeyUsage_Id.toString()); | |
| 131 | + unresCritExts.remove( | |
| 132 | + PKIXExtensions.SubjectAlternativeName_Id.toString()); | |
| 133 | + } | |
| 134 | + } | |
| 135 | + | |
| 136 | + /** | |
| 137 | + * Static method to verify that the key usage and extended key usage | |
| 138 | + * extension in a CA cert. The key usage extension, if present, must | |
| 139 | + * assert the keyCertSign bit. The extended key usage extension, if | |
| 140 | + * present, must include anyExtendedKeyUsage. | |
| 141 | + */ | |
| 142 | + static void verifyCAKeyUsage(X509Certificate cert) | |
| 143 | + throws CertPathValidatorException { | |
| 144 | + String msg = "CA key usage"; | |
| 145 | + if (debug != null) { | |
| 146 | + debug.println("KeyChecker.verifyCAKeyUsage() ---checking " + msg | |
| 147 | + + "..."); | |
| 148 | + } | |
| 149 | + | |
| 150 | + boolean[] keyUsageBits = cert.getKeyUsage(); | |
| 151 | + | |
| 152 | + // getKeyUsage returns null if the KeyUsage extension is not present | |
| 153 | + // in the certificate - in which case there is nothing to check | |
| 154 | + if (keyUsageBits == null) { | |
| 155 | + return; | |
| 156 | + } | |
| 157 | + | |
| 158 | + // throw an exception if the keyCertSign bit is not set | |
| 159 | + if (!keyUsageBits[keyCertSign]) { | |
| 160 | + throw new CertPathValidatorException | |
| 161 | + (msg + " check failed: keyCertSign bit is not set", null, | |
| 162 | + null, -1, PKIXReason.INVALID_KEY_USAGE); | |
| 163 | + } | |
| 164 | + | |
| 165 | + if (debug != null) { | |
| 166 | + debug.println("KeyChecker.verifyCAKeyUsage() " + msg | |
| 167 | + + " verified."); | |
| 168 | + } | |
| 169 | + } | |
| 170 | +} | |