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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.io.IOException; | ||
| 30 | |||
| 31 | import java.security.cert.Certificate; | ||
| 32 | import java.security.cert.CertificateException; | ||
| 33 | import java.security.cert.CertPathValidatorException; | ||
| 34 | import java.security.cert.PKIXCertPathChecker; | ||
| 35 | import java.security.cert.PKIXReason; | ||
| 36 | import java.security.cert.PolicyNode; | ||
| 37 | import java.security.cert.PolicyQualifierInfo; | ||
| 38 | import java.security.cert.X509Certificate; | ||
| 39 | |||
| 40 | import sun.security.util.Debug; | ||
| 41 | import sun.security.x509.CertificatePoliciesExtension; | ||
| 42 | import sun.security.x509.PolicyConstraintsExtension; | ||
| 43 | import sun.security.x509.PolicyMappingsExtension; | ||
| 44 | import sun.security.x509.CertificatePolicyMap; | ||
| 45 | import sun.security.x509.PKIXExtensions; | ||
| 46 | import sun.security.x509.PolicyInformation; | ||
| 47 | import sun.security.x509.X509CertImpl; | ||
| 48 | import sun.security.x509.InhibitAnyPolicyExtension; | ||
| 49 | |||
| 50 | /** | ||
| 51 | * PolicyChecker is a <code>PKIXCertPathChecker</code> that checks policy | ||
| 52 | * information on a PKIX certificate, namely certificate policies, policy | ||
| 53 | * mappings, policy constraints and policy qualifiers. | ||
| 54 | * | ||
| 55 | * @since 1.4 | ||
| 56 | * @author Yassir Elley | ||
| 57 | */ | ||
| 58 | class PolicyChecker extends PKIXCertPathChecker { | ||
| 59 | |||
| 60 | private final Set<String> initPolicies; | ||
| 61 | private final int certPathLen; | ||
| 62 | private final boolean expPolicyRequired; | ||
| 63 | private final boolean polMappingInhibited; | ||
| 64 | private final boolean anyPolicyInhibited; | ||
| 65 | private final boolean rejectPolicyQualifiers; | ||
| 66 | private PolicyNodeImpl rootNode; | ||
| 67 | private int explicitPolicy; | ||
| 68 | private int policyMapping; | ||
| 69 | private int inhibitAnyPolicy; | ||
| 70 | private int certIndex; | ||
| 71 | |||
| 72 | private Set<String> supportedExts; | ||
| 73 | |||
| 74 | private static final Debug debug = Debug.getInstance("certpath"); | ||
| 75 | static final String ANY_POLICY = "2.5.29.32.0"; | ||
| 76 | |||
| 77 | /** | ||
| 78 | * Constructs a Policy Checker. | ||
| 79 | * | ||
| 80 | * @param initialPolicies Set of initial policies | ||
| 81 | * @param certPathLen length of the certification path to be checked | ||
| 82 | * @param expPolicyRequired true if explicit policy is required | ||
| 83 | * @param polMappingInhibited true if policy mapping is inhibited | ||
| 84 | * @param anyPolicyInhibited true if the ANY_POLICY OID should be inhibited | ||
| 85 | * @param rejectPolicyQualifiers true if pol qualifiers are to be rejected | ||
| 86 | * @param rootNode the initial root node of the valid policy tree | ||
| 87 | */ | ||
| 88 | PolicyChecker(Set<String> initialPolicies, int certPathLen, | ||
| 89 | boolean expPolicyRequired, boolean polMappingInhibited, | ||
| 90 | boolean anyPolicyInhibited, boolean rejectPolicyQualifiers, | ||
| 91 | PolicyNodeImpl rootNode) throws CertPathValidatorException | ||
| 92 | { | ||
| 93 | if (initialPolicies.isEmpty()) { | ||
| 94 | // if no initialPolicies are specified by user, set | ||
| 95 | // initPolicies to be anyPolicy by default | ||
| 96 | this.initPolicies = new HashSet<String>(1); | ||
| 97 | this.initPolicies.add(ANY_POLICY); | ||
| 98 | } else { | ||
| 99 | this.initPolicies = new HashSet<String>(initialPolicies); | ||
| 100 | } | ||
| 101 | this.certPathLen = certPathLen; | ||
| 102 | this.expPolicyRequired = expPolicyRequired; | ||
| 103 | this.polMappingInhibited = polMappingInhibited; | ||
| 104 | this.anyPolicyInhibited = anyPolicyInhibited; | ||
| 105 | this.rejectPolicyQualifiers = rejectPolicyQualifiers; | ||
| 106 | this.rootNode = rootNode; | ||
| 107 | init(false); | ||
| 108 | } | ||
| 109 | |||
| 110 | /** | ||
| 111 | * Initializes the internal state of the checker from parameters | ||
| 112 | * specified in the constructor | ||
| 113 | * | ||
| 114 | * @param forward a boolean indicating whether this checker should | ||
| 115 | * be initialized capable of building in the forward direction | ||
| 116 | * @exception CertPathValidatorException Exception thrown if user | ||
| 117 | * wants to enable forward checking and forward checking is not supported. | ||
| 118 | */ | ||
| 119 | public void init(boolean forward) throws CertPathValidatorException { | ||
| 120 | if (forward) { | ||
| 121 | throw new CertPathValidatorException | ||
| 122 | ("forward checking not supported"); | ||
| 123 | } | ||
| 124 | |||
| 125 | certIndex = 1; | ||
| 126 | explicitPolicy = (expPolicyRequired ? 0 : certPathLen + 1); | ||
| 127 | policyMapping = (polMappingInhibited ? 0 : certPathLen + 1); | ||
| 128 | inhibitAnyPolicy = (anyPolicyInhibited ? 0 : certPathLen + 1); | ||
| 129 | } | ||
| 130 | |||
| 131 | /** | ||
| 132 | * Checks if forward checking is supported. Forward checking refers | ||
| 133 | * to the ability of the PKIXCertPathChecker to perform its checks | ||
| 134 | * when presented with certificates in the forward direction (from | ||
| 135 | * target to anchor). | ||
| 136 | * | ||
| 137 | * @return true if forward checking is supported, false otherwise | ||
| 138 | */ | ||
| 139 | public boolean isForwardCheckingSupported() { | ||
| 140 | return false; | ||
| 141 | } | ||
| 142 | |||
| 143 | /** | ||
| 144 | * Gets an immutable Set of the OID strings for the extensions that | ||
| 145 | * the PKIXCertPathChecker supports (i.e. recognizes, is able to | ||
| 146 | * process), or null if no extensions are | ||
| 147 | * supported. All OID strings that a PKIXCertPathChecker might | ||
| 148 | * possibly be able to process should be included. | ||
| 149 | * | ||
| 150 | * @return the Set of extensions supported by this PKIXCertPathChecker, | ||
| 151 | * or null if no extensions are supported | ||
| 152 | */ | ||
| 153 | public Set<String> getSupportedExtensions() { | ||
| 154 | if (supportedExts == null) { | ||
| 155 | supportedExts = new HashSet<String>(); | ||
| 156 | supportedExts.add(PKIXExtensions.CertificatePolicies_Id.toString()); | ||
| 157 | supportedExts.add(PKIXExtensions.PolicyMappings_Id.toString()); | ||
| 158 | supportedExts.add(PKIXExtensions.PolicyConstraints_Id.toString()); | ||
| 159 | supportedExts.add(PKIXExtensions.InhibitAnyPolicy_Id.toString()); | ||
| 160 | supportedExts = Collections.unmodifiableSet(supportedExts); | ||
| 161 | } | ||
| 162 | return supportedExts; | ||
| 163 | } | ||
| 164 | |||
| 165 | /** | ||
| 166 | * Performs the policy processing checks on the certificate using its | ||
| 167 | * internal state. | ||
| 168 | * | ||
| 169 | * @param cert the Certificate to be processed | ||
| 170 | * @param unresCritExts the unresolved critical extensions | ||
| 171 | * @exception CertPathValidatorException Exception thrown if | ||
| 172 | * the certificate does not verify. | ||
| 173 | */ | ||
| 174 | public void check(Certificate cert, Collection<String> unresCritExts) | ||
| 175 | throws CertPathValidatorException | ||
| 176 | { | ||
| 177 | // now do the policy checks | ||
| 178 | checkPolicy((X509Certificate) cert); | ||
| 179 | |||
| 180 | if (unresCritExts != null && !unresCritExts.isEmpty()) { | ||
| 181 | unresCritExts.remove(PKIXExtensions.CertificatePolicies_Id.toString()); | ||
| 182 | unresCritExts.remove(PKIXExtensions.PolicyMappings_Id.toString()); | ||
| 183 | unresCritExts.remove(PKIXExtensions.PolicyConstraints_Id.toString()); | ||
| 184 | unresCritExts.remove(PKIXExtensions.InhibitAnyPolicy_Id.toString()); | ||
| 185 | } | ||
| 186 | } | ||
| 187 | |||
| 188 | /** | ||
| 189 | * Internal method to run through all the checks. | ||
| 190 | * | ||
| 191 | * @param currCert the certificate to be processed | ||
| 192 | * @exception CertPathValidatorException Exception thrown if | ||
| 193 | * the certificate does not verify | ||
| 194 | */ | ||
| 195 | private void checkPolicy(X509Certificate currCert) | ||
| 196 | throws CertPathValidatorException | ||
| 197 | { | ||
| 198 | String msg = "certificate policies"; | ||
| 199 | if (debug != null) { | ||
| 200 | debug.println("PolicyChecker.checkPolicy() ---checking " + msg | ||
| 201 | + "..."); | ||
| 202 | debug.println("PolicyChecker.checkPolicy() certIndex = " | ||
| 203 | + certIndex); | ||
| 204 | debug.println("PolicyChecker.checkPolicy() BEFORE PROCESSING: " | ||
| 205 | + "explicitPolicy = " + explicitPolicy); | ||
| 206 | debug.println("PolicyChecker.checkPolicy() BEFORE PROCESSING: " | ||
| 207 | + "policyMapping = " + policyMapping); | ||
| 208 | debug.println("PolicyChecker.checkPolicy() BEFORE PROCESSING: " | ||
| 209 | + "inhibitAnyPolicy = " + inhibitAnyPolicy); | ||
| 210 | debug.println("PolicyChecker.checkPolicy() BEFORE PROCESSING: " | ||
| 211 | + "policyTree = " + rootNode); | ||
| 212 | } | ||
| 213 | |||
| 214 | X509CertImpl currCertImpl = null; | ||
| 215 | try { | ||
| 216 | currCertImpl = X509CertImpl.toImpl(currCert); | ||
| 217 | } catch (CertificateException ce) { | ||
| 218 | throw new CertPathValidatorException(ce); | ||
| 219 | } | ||
| 220 | |||
| 221 | boolean finalCert = (certIndex == certPathLen); | ||
| 222 | |||
| 223 | rootNode = processPolicies(certIndex, initPolicies, explicitPolicy, | ||
| 224 | policyMapping, inhibitAnyPolicy, rejectPolicyQualifiers, rootNode, | ||
| 225 | currCertImpl, finalCert); | ||
| 226 | |||
| 227 | if (!finalCert) { | ||
| 228 | explicitPolicy = mergeExplicitPolicy(explicitPolicy, currCertImpl, | ||
| 229 | finalCert); | ||
| 230 | policyMapping = mergePolicyMapping(policyMapping, currCertImpl); | ||
| 231 | inhibitAnyPolicy = mergeInhibitAnyPolicy(inhibitAnyPolicy, | ||
| 232 | currCertImpl); | ||
| 233 | } | ||
| 234 | |||
| 235 | certIndex++; | ||
| 236 | |||
| 237 | if (debug != null) { | ||
| 238 | debug.println("PolicyChecker.checkPolicy() AFTER PROCESSING: " | ||
| 239 | + "explicitPolicy = " + explicitPolicy); | ||
| 240 | debug.println("PolicyChecker.checkPolicy() AFTER PROCESSING: " | ||
| 241 | + "policyMapping = " + policyMapping); | ||
| 242 | debug.println("PolicyChecker.checkPolicy() AFTER PROCESSING: " | ||
| 243 | + "inhibitAnyPolicy = " + inhibitAnyPolicy); | ||
| 244 | debug.println("PolicyChecker.checkPolicy() AFTER PROCESSING: " | ||
| 245 | + "policyTree = " + rootNode); | ||
| 246 | debug.println("PolicyChecker.checkPolicy() " + msg + " verified"); | ||
| 247 | } | ||
| 248 | } | ||
| 249 | |||
| 250 | /** | ||
| 251 | * Merges the specified explicitPolicy value with the | ||
| 252 | * requireExplicitPolicy field of the <code>PolicyConstraints</code> | ||
| 253 | * extension obtained from the certificate. An explicitPolicy | ||
| 254 | * value of -1 implies no constraint. | ||
| 255 | * | ||
| 256 | * @param explicitPolicy an integer which indicates if a non-null | ||
| 257 | * valid policy tree is required | ||
| 258 | * @param currCert the Certificate to be processed | ||
| 259 | * @param finalCert a boolean indicating whether currCert is | ||
| 260 | * the final cert in the cert path | ||
| 261 | * @return returns the new explicitPolicy value | ||
| 262 | * @exception CertPathValidatorException Exception thrown if an error | ||
| 263 | * occurs | ||
| 264 | */ | ||
| 265 | static int mergeExplicitPolicy(int explicitPolicy, X509CertImpl currCert, | ||
| 266 | boolean finalCert) throws CertPathValidatorException | ||
| 267 | { | ||
| 268 | if ((explicitPolicy > 0) && !X509CertImpl.isSelfIssued(currCert)) { | ||
| 269 | explicitPolicy--; | ||
| 270 | } | ||
| 271 | |||
| 272 | try { | ||
| 273 | PolicyConstraintsExtension polConstExt | ||
| 274 | = currCert.getPolicyConstraintsExtension(); | ||
| 275 | if (polConstExt == null) | ||
| 276 | return explicitPolicy; | ||
| 277 | int require = ((Integer) | ||
| 278 | polConstExt.get(PolicyConstraintsExtension.REQUIRE)).intValue(); | ||
| 279 | if (debug != null) { | ||
| 280 | debug.println("PolicyChecker.mergeExplicitPolicy() " | ||
| 281 | + "require Index from cert = " + require); | ||
| 282 | } | ||
| 283 | if (!finalCert) { | ||
| 284 | if (require != -1) { | ||
| 285 | if ((explicitPolicy == -1) || (require < explicitPolicy)) { | ||
| 286 | explicitPolicy = require; | ||
| 287 | } | ||
| 288 | } | ||
| 289 | } else { | ||
| 290 | if (require == 0) | ||
| 291 | explicitPolicy = require; | ||
| 292 | } | ||
| 293 | } catch (Exception e) { | ||
| 294 | if (debug != null) { | ||
| 295 | debug.println("PolicyChecker.mergeExplicitPolicy " | ||
| 296 | + "unexpected exception"); | ||
| 297 | e.printStackTrace(); | ||
| 298 | } | ||
| 299 | throw new CertPathValidatorException(e); | ||
| 300 | } | ||
| 301 | |||
| 302 | return explicitPolicy; | ||
| 303 | } | ||
| 304 | |||
| 305 | /** | ||
| 306 | * Merges the specified policyMapping value with the | ||
| 307 | * inhibitPolicyMapping field of the <code>PolicyConstraints</code> | ||
| 308 | * extension obtained from the certificate. A policyMapping | ||
| 309 | * value of -1 implies no constraint. | ||
| 310 | * | ||
| 311 | * @param policyMapping an integer which indicates if policy mapping | ||
| 312 | * is inhibited | ||
| 313 | * @param currCert the Certificate to be processed | ||
| 314 | * @return returns the new policyMapping value | ||
| 315 | * @exception CertPathValidatorException Exception thrown if an error | ||
| 316 | * occurs | ||
| 317 | */ | ||
| 318 | static int mergePolicyMapping(int policyMapping, X509CertImpl currCert) | ||
| 319 | throws CertPathValidatorException | ||
| 320 | { | ||
| 321 | if ((policyMapping > 0) && !X509CertImpl.isSelfIssued(currCert)) { | ||
| 322 | policyMapping--; | ||
| 323 | } | ||
| 324 | |||
| 325 | try { | ||
| 326 | PolicyConstraintsExtension polConstExt | ||
| 327 | = currCert.getPolicyConstraintsExtension(); | ||
| 328 | if (polConstExt == null) | ||
| 329 | return policyMapping; | ||
| 330 | |||
| 331 | int inhibit = ((Integer) | ||
| 332 | polConstExt.get(PolicyConstraintsExtension.INHIBIT)).intValue(); | ||
| 333 | if (debug != null) | ||
| 334 | debug.println("PolicyChecker.mergePolicyMapping() " | ||
| 335 | + "inhibit Index from cert = " + inhibit); | ||
| 336 | |||
| 337 | if (inhibit != -1) { | ||
| 338 | if ((policyMapping == -1) || (inhibit < policyMapping)) { | ||
| 339 | policyMapping = inhibit; | ||
| 340 | } | ||
| 341 | } | ||
| 342 | } catch (Exception e) { | ||
| 343 | if (debug != null) { | ||
| 344 | debug.println("PolicyChecker.mergePolicyMapping " | ||
| 345 | + "unexpected exception"); | ||
| 346 | e.printStackTrace(); | ||
| 347 | } | ||
| 348 | throw new CertPathValidatorException(e); | ||
| 349 | } | ||
| 350 | |||
| 351 | return policyMapping; | ||
| 352 | } | ||
| 353 | |||
| 354 | /** | ||
| 355 | * Merges the specified inhibitAnyPolicy value with the | ||
| 356 | * SkipCerts value of the InhibitAnyPolicy | ||
| 357 | * extension obtained from the certificate. | ||
| 358 | * | ||
| 359 | * @param inhibitAnyPolicy an integer which indicates whether | ||
| 360 | * "any-policy" is considered a match | ||
| 361 | * @param currCert the Certificate to be processed | ||
| 362 | * @return returns the new inhibitAnyPolicy value | ||
| 363 | * @exception CertPathValidatorException Exception thrown if an error | ||
| 364 | * occurs | ||
| 365 | */ | ||
| 366 | static int mergeInhibitAnyPolicy(int inhibitAnyPolicy, | ||
| 367 | X509CertImpl currCert) throws CertPathValidatorException | ||
| 368 | { | ||
| 369 | if ((inhibitAnyPolicy > 0) && !X509CertImpl.isSelfIssued(currCert)) { | ||
| 370 | inhibitAnyPolicy--; | ||
| 371 | } | ||
| 372 | |||
| 373 | try { | ||
| 374 | InhibitAnyPolicyExtension inhAnyPolExt = (InhibitAnyPolicyExtension) | ||
| 375 | currCert.getExtension(PKIXExtensions.InhibitAnyPolicy_Id); | ||
| 376 | if (inhAnyPolExt == null) | ||
| 377 | return inhibitAnyPolicy; | ||
| 378 | |||
| 379 | int skipCerts = ((Integer) | ||
| 380 | inhAnyPolExt.get(InhibitAnyPolicyExtension.SKIP_CERTS)).intValue(); | ||
| 381 | if (debug != null) | ||
| 382 | debug.println("PolicyChecker.mergeInhibitAnyPolicy() " | ||
| 383 | + "skipCerts Index from cert = " + skipCerts); | ||
| 384 | |||
| 385 | if (skipCerts != -1) { | ||
| 386 | if (skipCerts < inhibitAnyPolicy) { | ||
| 387 | inhibitAnyPolicy = skipCerts; | ||
| 388 | } | ||
| 389 | } | ||
| 390 | } catch (Exception e) { | ||
| 391 | if (debug != null) { | ||
| 392 | debug.println("PolicyChecker.mergeInhibitAnyPolicy " | ||
| 393 | + "unexpected exception"); | ||
| 394 | e.printStackTrace(); | ||
| 395 | } | ||
| 396 | throw new CertPathValidatorException(e); | ||
| 397 | } | ||
| 398 | |||
| 399 | return inhibitAnyPolicy; | ||
| 400 | } | ||
| 401 | |||
| 402 | /** | ||
| 403 | * Processes certificate policies in the certificate. | ||
| 404 | * | ||
| 405 | * @param certIndex the index of the certificate | ||
| 406 | * @param initPolicies the initial policies required by the user | ||
| 407 | * @param explicitPolicy an integer which indicates if a non-null | ||
| 408 | * valid policy tree is required | ||
| 409 | * @param policyMapping an integer which indicates if policy | ||
| 410 | * mapping is inhibited | ||
| 411 | * @param inhibitAnyPolicy an integer which indicates whether | ||
| 412 | * "any-policy" is considered a match | ||
| 413 | * @param rejectPolicyQualifiers a boolean indicating whether the | ||
| 414 | * user wants to reject policies that have qualifiers | ||
| 415 | * @param origRootNode the root node of the valid policy tree | ||
| 416 | * @param currCert the Certificate to be processed | ||
| 417 | * @param finalCert a boolean indicating whether currCert is the final | ||
| 418 | * cert in the cert path | ||
| 419 | * @return the root node of the valid policy tree after modification | ||
| 420 | * @exception CertPathValidatorException Exception thrown if an | ||
| 421 | * error occurs while processing policies. | ||
| 422 | */ | ||
| 423 | static PolicyNodeImpl processPolicies(int certIndex, Set<String> initPolicies, | ||
| 424 | int explicitPolicy, int policyMapping, int inhibitAnyPolicy, | ||
| 425 | boolean rejectPolicyQualifiers, PolicyNodeImpl origRootNode, | ||
| 426 | X509CertImpl currCert, boolean finalCert) | ||
| 427 | throws CertPathValidatorException | ||
| 428 | { | ||
| 429 | boolean policiesCritical = false; | ||
| 430 | List<PolicyInformation> policyInfo; | ||
| 431 | PolicyNodeImpl rootNode = null; | ||
| 432 | Set<PolicyQualifierInfo> anyQuals = new HashSet<PolicyQualifierInfo>(); | ||
| 433 | |||
| 434 | if (origRootNode == null) | ||
| 435 | rootNode = null; | ||
| 436 | else | ||
| 437 | rootNode = origRootNode.copyTree(); | ||
| 438 | |||
| 439 | // retrieve policyOIDs from currCert | ||
| 440 | CertificatePoliciesExtension currCertPolicies | ||
| 441 | = currCert.getCertificatePoliciesExtension(); | ||
| 442 | |||
| 443 | // PKIX: Section 6.1.3: Step (d) | ||
| 444 | if ((currCertPolicies != null) && (rootNode != null)) { | ||
| 445 | policiesCritical = currCertPolicies.isCritical(); | ||
| 446 | if (debug != null) | ||
| 447 | debug.println("PolicyChecker.processPolicies() " | ||
| 448 | + "policiesCritical = " + policiesCritical); | ||
| 449 | |||
| 450 | try { | ||
| 451 | policyInfo = (List<PolicyInformation>) | ||
| 452 | currCertPolicies.get(CertificatePoliciesExtension.POLICIES); | ||
| 453 | } catch (IOException ioe) { | ||
| 454 | throw new CertPathValidatorException("Exception while " | ||
| 455 | + "retrieving policyOIDs", ioe); | ||
| 456 | } | ||
| 457 | |||
| 458 | if (debug != null) | ||
| 459 | debug.println("PolicyChecker.processPolicies() " | ||
| 460 | + "rejectPolicyQualifiers = " + rejectPolicyQualifiers); | ||
| 461 | |||
| 462 | boolean foundAnyPolicy = false; | ||
| 463 | |||
| 464 | // process each policy in cert | ||
| 465 | for (PolicyInformation curPolInfo : policyInfo) { | ||
| 466 | String curPolicy = | ||
| 467 | curPolInfo.getPolicyIdentifier().getIdentifier().toString(); | ||
| 468 | |||
| 469 | if (curPolicy.equals(ANY_POLICY)) { | ||
| 470 | foundAnyPolicy = true; | ||
| 471 | anyQuals = curPolInfo.getPolicyQualifiers(); | ||
| 472 | } else { | ||
| 473 | // PKIX: Section 6.1.3: Step (d)(1) | ||
| 474 | if (debug != null) | ||
| 475 | debug.println("PolicyChecker.processPolicies() " | ||
| 476 | + "processing policy: " + curPolicy); | ||
| 477 | |||
| 478 | // retrieve policy qualifiers from cert | ||
| 479 | Set<PolicyQualifierInfo> pQuals = | ||
| 480 | curPolInfo.getPolicyQualifiers(); | ||
| 481 | |||
| 482 | // reject cert if we find critical policy qualifiers and | ||
| 483 | // the policyQualifiersRejected flag is set in the params | ||
| 484 | if (!pQuals.isEmpty() && rejectPolicyQualifiers && | ||
| 485 | policiesCritical) { | ||
| 486 | throw new CertPathValidatorException( | ||
| 487 | "critical policy qualifiers present in certificate", | ||
| 488 | null, null, -1, PKIXReason.INVALID_POLICY); | ||
| 489 | } | ||
| 490 | |||
| 491 | // PKIX: Section 6.1.3: Step (d)(1)(i) | ||
| 492 | boolean foundMatch = processParents(certIndex, | ||
| 493 | policiesCritical, rejectPolicyQualifiers, rootNode, | ||
| 494 | curPolicy, pQuals, false); | ||
| 495 | |||
| 496 | if (!foundMatch) { | ||
| 497 | // PKIX: Section 6.1.3: Step (d)(1)(ii) | ||
| 498 | processParents(certIndex, policiesCritical, | ||
| 499 | rejectPolicyQualifiers, rootNode, curPolicy, | ||
| 500 | pQuals, true); | ||
| 501 | } | ||
| 502 | } | ||
| 503 | } | ||
| 504 | |||
| 505 | // PKIX: Section 6.1.3: Step (d)(2) | ||
| 506 | if (foundAnyPolicy) { | ||
| 507 | if ((inhibitAnyPolicy > 0) || | ||
| 508 | (!finalCert && X509CertImpl.isSelfIssued(currCert))) { | ||
| 509 | if (debug != null) { | ||
| 510 | debug.println("PolicyChecker.processPolicies() " | ||
| 511 | + "processing policy: " + ANY_POLICY); | ||
| 512 | } | ||
| 513 | processParents(certIndex, policiesCritical, | ||
| 514 | rejectPolicyQualifiers, rootNode, ANY_POLICY, anyQuals, | ||
| 515 | true); | ||
| 516 | } | ||
| 517 | } | ||
| 518 | |||
| 519 | // PKIX: Section 6.1.3: Step (d)(3) | ||
| 520 | rootNode.prune(certIndex); | ||
| 521 | if (!rootNode.getChildren().hasNext()) { | ||
| 522 | rootNode = null; | ||
| 523 | } | ||
| 524 | } else if (currCertPolicies == null) { | ||
| 525 | if (debug != null) | ||
| 526 | debug.println("PolicyChecker.processPolicies() " | ||
| 527 | + "no policies present in cert"); | ||
| 528 | // PKIX: Section 6.1.3: Step (e) | ||
| 529 | rootNode = null; | ||
| 530 | } | ||
| 531 | |||
| 532 | // We delay PKIX: Section 6.1.3: Step (f) to the end | ||
| 533 | // because the code that follows may delete some nodes | ||
| 534 | // resulting in a null tree | ||
| 535 | if (rootNode != null) { | ||
| 536 | if (!finalCert) { | ||
| 537 | // PKIX: Section 6.1.4: Steps (a)-(b) | ||
| 538 | rootNode = processPolicyMappings(currCert, certIndex, | ||
| 539 | policyMapping, rootNode, policiesCritical, anyQuals); | ||
| 540 | } | ||
| 541 | } | ||
| 542 | |||
| 543 | // At this point, we optimize the PKIX algorithm by | ||
| 544 | // removing those nodes which would later have | ||
| 545 | // been removed by PKIX: Section 6.1.5: Step (g)(iii) | ||
| 546 | |||
| 547 | if ((rootNode != null) && (!initPolicies.contains(ANY_POLICY)) | ||
| 548 | && (currCertPolicies != null)) { | ||
| 549 | rootNode = removeInvalidNodes(rootNode, certIndex, | ||
| 550 | initPolicies, currCertPolicies); | ||
| 551 | |||
| 552 | // PKIX: Section 6.1.5: Step (g)(iii) | ||
| 553 | if ((rootNode != null) && finalCert) { | ||
| 554 | // rewrite anyPolicy leaf nodes (see method comments) | ||
| 555 | rootNode = rewriteLeafNodes(certIndex, initPolicies, rootNode); | ||
| 556 | } | ||
| 557 | } | ||
| 558 | |||
| 559 | |||
| 560 | if (finalCert) { | ||
| 561 | // PKIX: Section 6.1.5: Steps (a) and (b) | ||
| 562 | explicitPolicy = mergeExplicitPolicy(explicitPolicy, currCert, | ||
| 563 | finalCert); | ||
| 564 | } | ||
| 565 | |||
| 566 | // PKIX: Section 6.1.3: Step (f) | ||
| 567 | // verify that either explicit policy is greater than 0 or | ||
| 568 | // the valid_policy_tree is not equal to NULL | ||
| 569 | |||
| 570 | if ((explicitPolicy == 0) && (rootNode == null)) { | ||
| 571 | throw new CertPathValidatorException | ||
| 572 | ("non-null policy tree required and policy tree is null", | ||
| 573 | null, null, -1, PKIXReason.INVALID_POLICY); | ||
| 574 | } | ||
| 575 | |||
| 576 | return rootNode; | ||
| 577 | } | ||
| 578 | |||
| 579 | /** | ||
| 580 | * Rewrite leaf nodes at the end of validation as described in RFC 3280 | ||
| 581 | * section 6.1.5: Step (g)(iii). Leaf nodes with anyPolicy are replaced | ||
| 582 | * by nodes explicitly representing initial policies not already | ||
| 583 | * represented by leaf nodes. | ||
| 584 | * | ||
| 585 | * This method should only be called when processing the final cert | ||
| 586 | * and if the policy tree is not null and initial policies is not | ||
| 587 | * anyPolicy. | ||
| 588 | * | ||
| 589 | * @param certIndex the depth of the tree | ||
| 590 | * @param initPolicies Set of user specified initial policies | ||
| 591 | * @param rootNode the root of the policy tree | ||
| 592 | */ | ||
| 593 | private static PolicyNodeImpl rewriteLeafNodes(int certIndex, | ||
| 594 | Set<String> initPolicies, PolicyNodeImpl rootNode) { | ||
| 595 | Set<PolicyNodeImpl> anyNodes = | ||
| 596 | rootNode.getPolicyNodesValid(certIndex, ANY_POLICY); | ||
| 597 | if (anyNodes.isEmpty()) { | ||
| 598 | return rootNode; | ||
| 599 | } | ||
| 600 | PolicyNodeImpl anyNode = anyNodes.iterator().next(); | ||
| 601 | PolicyNodeImpl parentNode = (PolicyNodeImpl)anyNode.getParent(); | ||
| 602 | parentNode.deleteChild(anyNode); | ||
| 603 | // see if there are any initialPolicies not represented by leaf nodes | ||
| 604 | Set<String> initial = new HashSet<String>(initPolicies); | ||
| 605 | for (PolicyNodeImpl node : rootNode.getPolicyNodes(certIndex)) { | ||
| 606 | initial.remove(node.getValidPolicy()); | ||
| 607 | } | ||
| 608 | if (initial.isEmpty()) { | ||
| 609 | // we deleted the anyPolicy node and have nothing to re-add, | ||
| 610 | // so we need to prune the tree | ||
| 611 | rootNode.prune(certIndex); | ||
| 612 | if (rootNode.getChildren().hasNext() == false) { | ||
| 613 | rootNode = null; | ||
| 614 | } | ||
| 615 | } else { | ||
| 616 | boolean anyCritical = anyNode.isCritical(); | ||
| 617 | Set<PolicyQualifierInfo> anyQualifiers = | ||
| 618 | anyNode.getPolicyQualifiers(); | ||
| 619 | for (String policy : initial) { | ||
| 620 | Set<String> expectedPolicies = Collections.singleton(policy); | ||
| 621 | PolicyNodeImpl node = new PolicyNodeImpl(parentNode, policy, | ||
| 622 | anyQualifiers, anyCritical, expectedPolicies, false); | ||
| 623 | } | ||
| 624 | } | ||
| 625 | return rootNode; | ||
| 626 | } | ||
| 627 | |||
| 628 | /** | ||
| 629 | * Finds the policy nodes of depth (certIndex-1) where curPolicy | ||
| 630 | * is in the expected policy set and creates a new child node | ||
| 631 | * appropriately. If matchAny is true, then a value of ANY_POLICY | ||
| 632 | * in the expected policy set will match any curPolicy. If matchAny | ||
| 633 | * is false, then the expected policy set must exactly contain the | ||
| 634 | * curPolicy to be considered a match. This method returns a boolean | ||
| 635 | * value indicating whether a match was found. | ||
| 636 | * | ||
| 637 | * @param certIndex the index of the certificate whose policy is | ||
| 638 | * being processed | ||
| 639 | * @param policiesCritical a boolean indicating whether the certificate | ||
| 640 | * policies extension is critical | ||
| 641 | * @param rejectPolicyQualifiers a boolean indicating whether the | ||
| 642 | * user wants to reject policies that have qualifiers | ||
| 643 | * @param rootNode the root node of the valid policy tree | ||
| 644 | * @param curPolicy a String representing the policy being processed | ||
| 645 | * @param pQuals the policy qualifiers of the policy being processed or an | ||
| 646 | * empty Set if there are no qualifiers | ||
| 647 | * @param matchAny a boolean indicating whether a value of ANY_POLICY | ||
| 648 | * in the expected policy set will be considered a match | ||
| 649 | * @return a boolean indicating whether a match was found | ||
| 650 | * @exception CertPathValidatorException Exception thrown if error occurs. | ||
| 651 | */ | ||
| 652 | private static boolean processParents(int certIndex, | ||
| 653 | boolean policiesCritical, boolean rejectPolicyQualifiers, | ||
| 654 | PolicyNodeImpl rootNode, String curPolicy, | ||
| 655 | Set<PolicyQualifierInfo> pQuals, | ||
| 656 | boolean matchAny) throws CertPathValidatorException | ||
| 657 | { | ||
| 658 | boolean foundMatch = false; | ||
| 659 | |||
| 660 | if (debug != null) | ||
| 661 | debug.println("PolicyChecker.processParents(): matchAny = " | ||
| 662 | + matchAny); | ||
| 663 | |||
| 664 | // find matching parents | ||
| 665 | Set<PolicyNodeImpl> parentNodes = | ||
| 666 | rootNode.getPolicyNodesExpected(certIndex - 1, | ||
| 667 | curPolicy, matchAny); | ||
| 668 | |||
| 669 | // for each matching parent, extend policy tree | ||
| 670 | for (PolicyNodeImpl curParent : parentNodes) { | ||
| 671 | if (debug != null) | ||
| 672 | debug.println("PolicyChecker.processParents() " | ||
| 673 | + "found parent:\n" + curParent.asString()); | ||
| 674 | |||
| 675 | foundMatch = true; | ||
| 676 | String curParPolicy = curParent.getValidPolicy(); | ||
| 677 | |||
| 678 | PolicyNodeImpl curNode = null; | ||
| 679 | Set<String> curExpPols = null; | ||
| 680 | |||
| 681 | if (curPolicy.equals(ANY_POLICY)) { | ||
| 682 | // do step 2 | ||
| 683 | Set<String> parExpPols = curParent.getExpectedPolicies(); | ||
| 684 | parentExplicitPolicies: | ||
| 685 | for (String curParExpPol : parExpPols) { | ||
| 686 | |||
| 687 | Iterator<PolicyNodeImpl> childIter = | ||
| 688 | curParent.getChildren(); | ||
| 689 | while (childIter.hasNext()) { | ||
| 690 | PolicyNodeImpl childNode = childIter.next(); | ||
| 691 | String childPolicy = childNode.getValidPolicy(); | ||
| 692 | if (curParExpPol.equals(childPolicy)) { | ||
| 693 | if (debug != null) | ||
| 694 | debug.println(childPolicy + " in parent's " | ||
| 695 | + "expected policy set already appears in " | ||
| 696 | + "child node"); | ||
| 697 | continue parentExplicitPolicies; | ||
| 698 | } | ||
| 699 | } | ||
| 700 | |||
| 701 | Set<String> expPols = new HashSet<String>(); | ||
| 702 | expPols.add(curParExpPol); | ||
| 703 | |||
| 704 | curNode = new PolicyNodeImpl | ||
| 705 | (curParent, curParExpPol, pQuals, | ||
| 706 | policiesCritical, expPols, false); | ||
| 707 | } | ||
| 708 | } else { | ||
| 709 | curExpPols = new HashSet<String>(); | ||
| 710 | curExpPols.add(curPolicy); | ||
| 711 | |||
| 712 | curNode = new PolicyNodeImpl | ||
| 713 | (curParent, curPolicy, pQuals, | ||
| 714 | policiesCritical, curExpPols, false); | ||
| 715 | } | ||
| 716 | } | ||
| 717 | |||
| 718 | return foundMatch; | ||
| 719 | } | ||
| 720 | |||
| 721 | /** | ||
| 722 | * Processes policy mappings in the certificate. | ||
| 723 | * | ||
| 724 | * @param currCert the Certificate to be processed | ||
| 725 | * @param certIndex the index of the current certificate | ||
| 726 | * @param policyMapping an integer which indicates if policy | ||
| 727 | * mapping is inhibited | ||
| 728 | * @param rootNode the root node of the valid policy tree | ||
| 729 | * @param policiesCritical a boolean indicating if the certificate policies | ||
| 730 | * extension is critical | ||
| 731 | * @param anyQuals the qualifiers associated with ANY-POLICY, or an empty | ||
| 732 | * Set if there are no qualifiers associated with ANY-POLICY | ||
| 733 | * @return the root node of the valid policy tree after modification | ||
| 734 | * @exception CertPathValidatorException exception thrown if an error | ||
| 735 | * occurs while processing policy mappings | ||
| 736 | */ | ||
| 737 | private static PolicyNodeImpl processPolicyMappings(X509CertImpl currCert, | ||
| 738 | int certIndex, int policyMapping, PolicyNodeImpl rootNode, | ||
| 739 | boolean policiesCritical, Set<PolicyQualifierInfo> anyQuals) | ||
| 740 | throws CertPathValidatorException | ||
| 741 | { | ||
| 742 | PolicyMappingsExtension polMappingsExt | ||
| 743 | = currCert.getPolicyMappingsExtension(); | ||
| 744 | |||
| 745 | if (polMappingsExt == null) | ||
| 746 | return rootNode; | ||
| 747 | |||
| 748 | if (debug != null) | ||
| 749 | debug.println("PolicyChecker.processPolicyMappings() " | ||
| 750 | + "inside policyMapping check"); | ||
| 751 | |||
| 752 | List<CertificatePolicyMap> maps = null; | ||
| 753 | try { | ||
| 754 | maps = (List<CertificatePolicyMap>)polMappingsExt.get | ||
| 755 | (PolicyMappingsExtension.MAP); | ||
| 756 | } catch (IOException e) { | ||
| 757 | if (debug != null) { | ||
| 758 | debug.println("PolicyChecker.processPolicyMappings() " | ||
| 759 | + "mapping exception"); | ||
| 760 | e.printStackTrace(); | ||
| 761 | } | ||
| 762 | throw new CertPathValidatorException("Exception while checking " | ||
| 763 | + "mapping", e); | ||
| 764 | } | ||
| 765 | |||
| 766 | boolean childDeleted = false; | ||
| 767 | for (int j = 0; j < maps.size(); j++) { | ||
| 768 | CertificatePolicyMap polMap = maps.get(j); | ||
| 769 | String issuerDomain | ||
| 770 | = polMap.getIssuerIdentifier().getIdentifier().toString(); | ||
| 771 | String subjectDomain | ||
| 772 | = polMap.getSubjectIdentifier().getIdentifier().toString(); | ||
| 773 | if (debug != null) { | ||
| 774 | debug.println("PolicyChecker.processPolicyMappings() " | ||
| 775 | + "issuerDomain = " + issuerDomain); | ||
| 776 | debug.println("PolicyChecker.processPolicyMappings() " | ||
| 777 | + "subjectDomain = " + subjectDomain); | ||
| 778 | } | ||
| 779 | |||
| 780 | if (issuerDomain.equals(ANY_POLICY)) { | ||
| 781 | throw new CertPathValidatorException | ||
| 782 | ("encountered an issuerDomainPolicy of ANY_POLICY", | ||
| 783 | null, null, -1, PKIXReason.INVALID_POLICY); | ||
| 784 | } | ||
| 785 | |||
| 786 | if (subjectDomain.equals(ANY_POLICY)) { | ||
| 787 | throw new CertPathValidatorException | ||
| 788 | ("encountered a subjectDomainPolicy of ANY_POLICY", | ||
| 789 | null, null, -1, PKIXReason.INVALID_POLICY); | ||
| 790 | } | ||
| 791 | |||
| 792 | Set<PolicyNodeImpl> validNodes = | ||
| 793 | rootNode.getPolicyNodesValid(certIndex, issuerDomain); | ||
| 794 | if (!validNodes.isEmpty()) { | ||
| 795 | for (PolicyNodeImpl curNode : validNodes) { | ||
| 796 | if ((policyMapping > 0) || (policyMapping == -1)) { | ||
| 797 | curNode.addExpectedPolicy(subjectDomain); | ||
| 798 | } else if (policyMapping == 0) { | ||
| 799 | PolicyNodeImpl parentNode = | ||
| 800 | (PolicyNodeImpl) curNode.getParent(); | ||
| 801 | if (debug != null) | ||
| 802 | debug.println("PolicyChecker.processPolicyMappings" | ||
| 803 | + "() before deleting: policy tree = " | ||
| 804 | + rootNode); | ||
| 805 | parentNode.deleteChild(curNode); | ||
| 806 | childDeleted = true; | ||
| 807 | if (debug != null) | ||
| 808 | debug.println("PolicyChecker.processPolicyMappings" | ||
| 809 | + "() after deleting: policy tree = " | ||
| 810 | + rootNode); | ||
| 811 | } | ||
| 812 | } | ||
| 813 | } else { // no node of depth i has a valid policy | ||
| 814 | if ((policyMapping > 0) || (policyMapping == -1)) { | ||
| 815 | Set<PolicyNodeImpl> validAnyNodes = | ||
| 816 | rootNode.getPolicyNodesValid(certIndex, ANY_POLICY); | ||
| 817 | for (PolicyNodeImpl curAnyNode : validAnyNodes) { | ||
| 818 | PolicyNodeImpl curAnyNodeParent = | ||
| 819 | (PolicyNodeImpl) curAnyNode.getParent(); | ||
| 820 | |||
| 821 | Set<String> expPols = new HashSet<String>(); | ||
| 822 | expPols.add(subjectDomain); | ||
| 823 | |||
| 824 | PolicyNodeImpl curNode = new PolicyNodeImpl | ||
| 825 | (curAnyNodeParent, issuerDomain, anyQuals, | ||
| 826 | policiesCritical, expPols, true); | ||
| 827 | } | ||
| 828 | } | ||
| 829 | } | ||
| 830 | } | ||
| 831 | |||
| 832 | if (childDeleted) { | ||
| 833 | rootNode.prune(certIndex); | ||
| 834 | if (!rootNode.getChildren().hasNext()) { | ||
| 835 | if (debug != null) | ||
| 836 | debug.println("setting rootNode to null"); | ||
| 837 | rootNode = null; | ||
| 838 | } | ||
| 839 | } | ||
| 840 | |||
| 841 | return rootNode; | ||
| 842 | } | ||
| 843 | |||
| 844 | /** | ||
| 845 | * Removes those nodes which do not intersect with the initial policies | ||
| 846 | * specified by the user. | ||
| 847 | * | ||
| 848 | * @param rootNode the root node of the valid policy tree | ||
| 849 | * @param certIndex the index of the certificate being processed | ||
| 850 | * @param initPolicies the Set of policies required by the user | ||
| 851 | * @param currCertPolicies the CertificatePoliciesExtension of the | ||
| 852 | * certificate being processed | ||
| 853 | * @returns the root node of the valid policy tree after modification | ||
| 854 | * @exception CertPathValidatorException Exception thrown if error occurs. | ||
| 855 | */ | ||
| 856 | private static PolicyNodeImpl removeInvalidNodes(PolicyNodeImpl rootNode, | ||
| 857 | int certIndex, Set<String> initPolicies, | ||
| 858 | CertificatePoliciesExtension currCertPolicies) | ||
| 859 | throws CertPathValidatorException | ||
| 860 | { | ||
| 861 | List<PolicyInformation> policyInfo = null; | ||
| 862 | try { | ||
| 863 | policyInfo = (List<PolicyInformation>) | ||
| 864 | currCertPolicies.get(CertificatePoliciesExtension.POLICIES); | ||
| 865 | } catch (IOException ioe) { | ||
| 866 | throw new CertPathValidatorException("Exception while " | ||
| 867 | + "retrieving policyOIDs", ioe); | ||
| 868 | } | ||
| 869 | |||
| 870 | boolean childDeleted = false; | ||
| 871 | for (PolicyInformation curPolInfo : policyInfo) { | ||
| 872 | String curPolicy = | ||
| 873 | curPolInfo.getPolicyIdentifier().getIdentifier().toString(); | ||
| 874 | |||
| 875 | if (debug != null) | ||
| 876 | debug.println("PolicyChecker.processPolicies() " | ||
| 877 | + "processing policy second time: " + curPolicy); | ||
| 878 | |||
| 879 | Set<PolicyNodeImpl> validNodes = | ||
| 880 | rootNode.getPolicyNodesValid(certIndex, curPolicy); | ||
| 881 | for (PolicyNodeImpl curNode : validNodes) { | ||
| 882 | PolicyNodeImpl parentNode = (PolicyNodeImpl)curNode.getParent(); | ||
| 883 | if (parentNode.getValidPolicy().equals(ANY_POLICY)) { | ||
| 884 | if ((!initPolicies.contains(curPolicy)) && | ||
| 885 | (!curPolicy.equals(ANY_POLICY))) { | ||
| 886 | if (debug != null) | ||
| 887 | debug.println("PolicyChecker.processPolicies() " | ||
| 888 | + "before deleting: policy tree = " + rootNode); | ||
| 889 | parentNode.deleteChild(curNode); | ||
| 890 | childDeleted = true; | ||
| 891 | if (debug != null) | ||
| 892 | debug.println("PolicyChecker.processPolicies() " | ||
| 893 | + "after deleting: policy tree = " + rootNode); | ||
| 894 | } | ||
| 895 | } | ||
| 896 | } | ||
| 897 | } | ||
| 898 | |||
| 899 | if (childDeleted) { | ||
| 900 | rootNode.prune(certIndex); | ||
| 901 | if (!rootNode.getChildren().hasNext()) { | ||
| 902 | rootNode = null; | ||
| 903 | } | ||
| 904 | } | ||
| 905 | |||
| 906 | return rootNode; | ||
| 907 | } | ||
| 908 | |||
| 909 | /** | ||
| 910 | * Gets the root node of the valid policy tree, or null if the | ||
| 911 | * valid policy tree is null. Marks each node of the returned tree | ||
| 912 | * immutable and thread-safe. | ||
| 913 | * | ||
| 914 | * @returns the root node of the valid policy tree, or null if | ||
| 915 | * the valid policy tree is null | ||
| 916 | */ | ||
| 917 | PolicyNode getPolicyTree() { | ||
| 918 | if (rootNode == null) | ||
| 919 | return null; | ||
| 920 | else { | ||
| 921 | PolicyNodeImpl policyTree = rootNode.copyTree(); | ||
| 922 | policyTree.setImmutable(); | ||
| 923 | return policyTree; | ||
| 924 | } | ||
| 925 | } | ||
| 926 | } | ||