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| 1 | /* | ||
| 2 | * Copyright (c) 2000, 2006, 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.io.IOException; | ||
| 29 | import java.security.PublicKey; | ||
| 30 | import java.security.cert.CertificateException; | ||
| 31 | import java.security.cert.CertPathValidatorException; | ||
| 32 | import java.security.cert.PKIXCertPathChecker; | ||
| 33 | import java.security.cert.X509Certificate; | ||
| 34 | import java.security.interfaces.DSAPublicKey; | ||
| 35 | import java.util.ArrayList; | ||
| 36 | import java.util.HashSet; | ||
| 37 | import java.util.Iterator; | ||
| 38 | import java.util.List; | ||
| 39 | import java.util.ListIterator; | ||
| 40 | import javax.security.auth.x500.X500Principal; | ||
| 41 | |||
| 42 | import sun.security.util.Debug; | ||
| 43 | import sun.security.x509.SubjectAlternativeNameExtension; | ||
| 44 | import sun.security.x509.GeneralNames; | ||
| 45 | import sun.security.x509.GeneralName; | ||
| 46 | import sun.security.x509.GeneralNameInterface; | ||
| 47 | import sun.security.x509.X500Name; | ||
| 48 | import sun.security.x509.X509CertImpl; | ||
| 49 | |||
| 50 | /** | ||
| 51 | * A specification of a forward PKIX validation state | ||
| 52 | * which is initialized by each build and updated each time a | ||
| 53 | * certificate is added to the current path. | ||
| 54 | * @since 1.4 | ||
| 55 | * @author Yassir Elley | ||
| 56 | */ | ||
| 57 | class ForwardState implements State { | ||
| 58 | |||
| 59 | private static final Debug debug = Debug.getInstance("certpath"); | ||
| 60 | |||
| 61 | /* The issuer DN of the last cert in the path */ | ||
| 62 | X500Principal issuerDN; | ||
| 63 | |||
| 64 | /* The last cert in the path */ | ||
| 65 | X509CertImpl cert; | ||
| 66 | |||
| 67 | /* The set of subjectDNs and subjectAltNames of all certs in the path */ | ||
| 68 | HashSet<GeneralNameInterface> subjectNamesTraversed; | ||
| 69 | |||
| 70 | /* | ||
| 71 | * The number of intermediate CA certs which have been traversed so | ||
| 72 | * far in the path | ||
| 73 | */ | ||
| 74 | int traversedCACerts; | ||
| 75 | |||
| 76 | /* Flag indicating if state is initial (path is just starting) */ | ||
| 77 | private boolean init = true; | ||
| 78 | |||
| 79 | /* the checker used for revocation status */ | ||
| 80 | public CrlRevocationChecker crlChecker; | ||
| 81 | |||
| 82 | /* The list of user-defined checkers that support forward checking */ | ||
| 83 | ArrayList<PKIXCertPathChecker> forwardCheckers; | ||
| 84 | |||
| 85 | /* Flag indicating if key needing to inherit key parameters has been | ||
| 86 | * encountered. | ||
| 87 | */ | ||
| 88 | boolean keyParamsNeededFlag = false; | ||
| 89 | |||
| 90 | /** | ||
| 91 | * Returns a boolean flag indicating if the state is initial | ||
| 92 | * (just starting) | ||
| 93 | * | ||
| 94 | * @return boolean flag indicating if the state is initial (just starting) | ||
| 95 | */ | ||
| 96 | public boolean isInitial() { | ||
| 97 | return init; | ||
| 98 | } | ||
| 99 | |||
| 100 | /** | ||
| 101 | * Return boolean flag indicating whether a public key that needs to inherit | ||
| 102 | * key parameters has been encountered. | ||
| 103 | * | ||
| 104 | * @return boolean true if key needing to inherit parameters has been | ||
| 105 | * encountered; false otherwise. | ||
| 106 | */ | ||
| 107 | public boolean keyParamsNeeded() { | ||
| 108 | return keyParamsNeededFlag; | ||
| 109 | } | ||
| 110 | |||
| 111 | /** | ||
| 112 | * Display state for debugging purposes | ||
| 113 | */ | ||
| 114 | public String toString() { | ||
| 115 | StringBuffer sb = new StringBuffer(); | ||
| 116 | try { | ||
| 117 | sb.append("State ["); | ||
| 118 | sb.append("\n issuerDN of last cert: " + issuerDN); | ||
| 119 | sb.append("\n traversedCACerts: " + traversedCACerts); | ||
| 120 | sb.append("\n init: " + String.valueOf(init)); | ||
| 121 | sb.append("\n keyParamsNeeded: " | ||
| 122 | + String.valueOf(keyParamsNeededFlag)); | ||
| 123 | sb.append("\n subjectNamesTraversed: \n" + subjectNamesTraversed); | ||
| 124 | sb.append("]\n"); | ||
| 125 | } catch (Exception e) { | ||
| 126 | if (debug != null) { | ||
| 127 | debug.println("ForwardState.toString() unexpected exception"); | ||
| 128 | e.printStackTrace(); | ||
| 129 | } | ||
| 130 | } | ||
| 131 | return sb.toString(); | ||
| 132 | } | ||
| 133 | |||
| 134 | /** | ||
| 135 | * Initialize the state. | ||
| 136 | * | ||
| 137 | * @param certPathCheckers the list of user-defined PKIXCertPathCheckers | ||
| 138 | */ | ||
| 139 | public void initState(List<PKIXCertPathChecker> certPathCheckers) | ||
| 140 | throws CertPathValidatorException | ||
| 141 | { | ||
| 142 | subjectNamesTraversed = new HashSet<GeneralNameInterface>(); | ||
| 143 | traversedCACerts = 0; | ||
| 144 | |||
| 145 | /* | ||
| 146 | * Populate forwardCheckers with every user-defined checker | ||
| 147 | * that supports forward checking and initialize the forwardCheckers | ||
| 148 | */ | ||
| 149 | forwardCheckers = new ArrayList<PKIXCertPathChecker>(); | ||
| 150 | if (certPathCheckers != null) { | ||
| 151 | for (PKIXCertPathChecker checker : certPathCheckers) { | ||
| 152 | if (checker.isForwardCheckingSupported()) { | ||
| 153 | checker.init(true); | ||
| 154 | forwardCheckers.add(checker); | ||
| 155 | } | ||
| 156 | } | ||
| 157 | } | ||
| 158 | |||
| 159 | init = true; | ||
| 160 | } | ||
| 161 | |||
| 162 | /** | ||
| 163 | * Update the state with the next certificate added to the path. | ||
| 164 | * | ||
| 165 | * @param cert the certificate which is used to update the state | ||
| 166 | */ | ||
| 167 | public void updateState(X509Certificate cert) | ||
| 168 | throws CertificateException, IOException, CertPathValidatorException { | ||
| 169 | |||
| 170 | if (cert == null) | ||
| 171 | return; | ||
| 172 | |||
| 173 | X509CertImpl icert = X509CertImpl.toImpl(cert); | ||
| 174 | |||
| 175 | /* see if certificate key has null parameters */ | ||
| 176 | PublicKey newKey = icert.getPublicKey(); | ||
| 177 | if (newKey instanceof DSAPublicKey && | ||
| 178 | ((DSAPublicKey)newKey).getParams() == null) { | ||
| 179 | keyParamsNeededFlag = true; | ||
| 180 | } | ||
| 181 | |||
| 182 | /* update certificate */ | ||
| 183 | this.cert = icert; | ||
| 184 | |||
| 185 | /* update issuer DN */ | ||
| 186 | issuerDN = cert.getIssuerX500Principal(); | ||
| 187 | |||
| 188 | if (!X509CertImpl.isSelfIssued(cert)) { | ||
| 189 | |||
| 190 | /* | ||
| 191 | * update traversedCACerts only if this is a non-self-issued | ||
| 192 | * intermediate CA cert | ||
| 193 | */ | ||
| 194 | if (!init && cert.getBasicConstraints() != -1) { | ||
| 195 | traversedCACerts++; | ||
| 196 | } | ||
| 197 | } | ||
| 198 | |||
| 199 | /* update subjectNamesTraversed only if this is the EE cert or if | ||
| 200 | this cert is not self-issued */ | ||
| 201 | if (init || !X509CertImpl.isSelfIssued(cert)){ | ||
| 202 | X500Principal subjName = cert.getSubjectX500Principal(); | ||
| 203 | subjectNamesTraversed.add(X500Name.asX500Name(subjName)); | ||
| 204 | |||
| 205 | try { | ||
| 206 | SubjectAlternativeNameExtension subjAltNameExt | ||
| 207 | = icert.getSubjectAlternativeNameExtension(); | ||
| 208 | if (subjAltNameExt != null) { | ||
| 209 | GeneralNames gNames = (GeneralNames) | ||
| 210 | subjAltNameExt.get(SubjectAlternativeNameExtension.SUBJECT_NAME); | ||
| 211 | for (Iterator<GeneralName> t = gNames.iterator(); | ||
| 212 | t.hasNext(); ) { | ||
| 213 | GeneralNameInterface gName = t.next().getName(); | ||
| 214 | subjectNamesTraversed.add(gName); | ||
| 215 | } | ||
| 216 | } | ||
| 217 | } catch (Exception e) { | ||
| 218 | if (debug != null) { | ||
| 219 | debug.println("ForwardState.updateState() unexpected " | ||
| 220 | + "exception"); | ||
| 221 | e.printStackTrace(); | ||
| 222 | } | ||
| 223 | throw new CertPathValidatorException(e); | ||
| 224 | } | ||
| 225 | } | ||
| 226 | |||
| 227 | init = false; | ||
| 228 | } | ||
| 229 | |||
| 230 | /* | ||
| 231 | * Clone current state. The state is cloned as each cert is | ||
| 232 | * added to the path. This is necessary if backtracking occurs, | ||
| 233 | * and a prior state needs to be restored. | ||
| 234 | * | ||
| 235 | * Note that this is a SMART clone. Not all fields are fully copied, | ||
| 236 | * because some of them will | ||
| 237 | * not have their contents modified by subsequent calls to updateState. | ||
| 238 | */ | ||
| 239 | public Object clone() { | ||
| 240 | try { | ||
| 241 | ForwardState clonedState = (ForwardState) super.clone(); | ||
| 242 | |||
| 243 | /* clone checkers, if cloneable */ | ||
| 244 | clonedState.forwardCheckers = (ArrayList<PKIXCertPathChecker>) | ||
| 245 | forwardCheckers.clone(); | ||
| 246 | ListIterator<PKIXCertPathChecker> li = | ||
| 247 | clonedState.forwardCheckers.listIterator(); | ||
| 248 | while (li.hasNext()) { | ||
| 249 | PKIXCertPathChecker checker = li.next(); | ||
| 250 | if (checker instanceof Cloneable) { | ||
| 251 | li.set((PKIXCertPathChecker)checker.clone()); | ||
| 252 | } | ||
| 253 | } | ||
| 254 | |||
| 255 | /* | ||
| 256 | * Shallow copy traversed names. There is no need to | ||
| 257 | * deep copy contents, since the elements of the Set | ||
| 258 | * are never modified by subsequent calls to updateState(). | ||
| 259 | */ | ||
| 260 | clonedState.subjectNamesTraversed | ||
| 261 | = (HashSet<GeneralNameInterface>)subjectNamesTraversed.clone(); | ||
| 262 | return clonedState; | ||
| 263 | } catch (CloneNotSupportedException e) { | ||
| 264 | throw new InternalError(e.toString()); | ||
| 265 | } | ||
| 266 | } | ||
| 267 | } | ||