J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2002-2007 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.security.provider.certpath; |
| 27 | |
| 28 | import java.io.*; |
| 29 | import java.net.URI; |
| 30 | import java.util.*; |
| 31 | import java.security.*; |
| 32 | import java.security.cert.*; |
| 33 | import javax.security.auth.x500.X500Principal; |
| 34 | |
| 35 | import sun.security.action.GetPropertyAction; |
| 36 | import sun.security.util.Debug; |
| 37 | import sun.security.x509.*; |
| 38 | |
| 39 | /** |
| 40 | * Class to obtain CRLs via the CRLDistributionPoints extension. |
| 41 | * Note that the functionality of this class must be explicitly enabled |
| 42 | * via a system property, see the USE_CRLDP variable below. |
| 43 | * |
| 44 | * This class uses the URICertStore class to fetch CRLs. The URICertStore |
| 45 | * class also implements CRL caching: see the class description for more |
| 46 | * information. |
| 47 | * |
| 48 | * @author Andreas Sterbenz |
| 49 | * @author Sean Mullan |
| 50 | * @since 1.4.2 |
| 51 | */ |
| 52 | class DistributionPointFetcher { |
| 53 | |
| 54 | private static final Debug debug = Debug.getInstance("certpath"); |
| 55 | |
| 56 | private static final boolean[] ALL_REASONS = |
| 57 | {true, true, true, true, true, true, true, true, true}; |
| 58 | |
| 59 | /** |
| 60 | * Flag indicating whether support for the CRL distribution point |
| 61 | * extension shall be enabled. Currently disabled by default for |
| 62 | * compatibility and legal reasons. |
| 63 | */ |
| 64 | private final static boolean USE_CRLDP = |
| 65 | getBooleanProperty("com.sun.security.enableCRLDP", false); |
| 66 | |
| 67 | /** |
| 68 | * Return the value of the boolean System property propName. |
| 69 | */ |
| 70 | public static boolean getBooleanProperty(String propName, |
| 71 | boolean defaultValue) { |
| 72 | // if set, require value of either true or false |
| 73 | String b = AccessController.doPrivileged( |
| 74 | new GetPropertyAction(propName)); |
| 75 | if (b == null) { |
| 76 | return defaultValue; |
| 77 | } else if (b.equalsIgnoreCase("false")) { |
| 78 | return false; |
| 79 | } else if (b.equalsIgnoreCase("true")) { |
| 80 | return true; |
| 81 | } else { |
| 82 | throw new RuntimeException("Value of " + propName |
| 83 | + " must either be 'true' or 'false'"); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | // singleton instance |
| 88 | private static final DistributionPointFetcher INSTANCE = |
| 89 | new DistributionPointFetcher(); |
| 90 | |
| 91 | /** |
| 92 | * Private instantiation only. |
| 93 | */ |
| 94 | private DistributionPointFetcher() {} |
| 95 | |
| 96 | /** |
| 97 | * Return a DistributionPointFetcher instance. |
| 98 | */ |
| 99 | static DistributionPointFetcher getInstance() { |
| 100 | return INSTANCE; |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Return the X509CRLs matching this selector. The selector must be |
| 105 | * an X509CRLSelector with certificateChecking set. |
| 106 | * |
| 107 | * If CRLDP support is disabled, this method always returns an |
| 108 | * empty set. |
| 109 | */ |
| 110 | Collection<X509CRL> getCRLs(X509CRLSelector selector, boolean signFlag, |
| 111 | PublicKey prevKey, String provider, List<CertStore> certStores, |
| 112 | boolean[] reasonsMask, TrustAnchor anchor) throws CertStoreException |
| 113 | { |
| 114 | if (USE_CRLDP == false) { |
| 115 | return Collections.emptySet(); |
| 116 | } |
| 117 | X509Certificate cert = selector.getCertificateChecking(); |
| 118 | if (cert == null) { |
| 119 | return Collections.emptySet(); |
| 120 | } |
| 121 | try { |
| 122 | X509CertImpl certImpl = X509CertImpl.toImpl(cert); |
| 123 | if (debug != null) { |
| 124 | debug.println("DistributionPointFetcher.getCRLs: Checking " |
| 125 | + "CRLDPs for " + certImpl.getSubjectX500Principal()); |
| 126 | } |
| 127 | CRLDistributionPointsExtension ext = |
| 128 | certImpl.getCRLDistributionPointsExtension(); |
| 129 | if (ext == null) { |
| 130 | if (debug != null) { |
| 131 | debug.println("No CRLDP ext"); |
| 132 | } |
| 133 | return Collections.emptySet(); |
| 134 | } |
| 135 | List<DistributionPoint> points = (List<DistributionPoint>)ext.get( |
| 136 | CRLDistributionPointsExtension.POINTS); |
| 137 | Set<X509CRL> results = new HashSet<X509CRL>(); |
| 138 | for (Iterator<DistributionPoint> t = points.iterator(); |
| 139 | t.hasNext() && !Arrays.equals(reasonsMask, ALL_REASONS); ) { |
| 140 | DistributionPoint point = t.next(); |
| 141 | Collection<X509CRL> crls = getCRLs(selector, certImpl, |
| 142 | point, reasonsMask, signFlag, prevKey, provider, |
| 143 | certStores, anchor); |
| 144 | results.addAll(crls); |
| 145 | } |
| 146 | if (debug != null) { |
| 147 | debug.println("Returning " + results.size() + " CRLs"); |
| 148 | } |
| 149 | return results; |
| 150 | } catch (CertificateException e) { |
| 151 | return Collections.emptySet(); |
| 152 | } catch (IOException e) { |
| 153 | return Collections.emptySet(); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * Download CRLs from the given distribution point, verify and return them. |
| 159 | * See the top of the class for current limitations. |
| 160 | */ |
| 161 | private Collection<X509CRL> getCRLs(X509CRLSelector selector, |
| 162 | X509CertImpl certImpl, DistributionPoint point, boolean[] reasonsMask, |
| 163 | boolean signFlag, PublicKey prevKey, String provider, |
| 164 | List<CertStore> certStores, TrustAnchor anchor) |
| 165 | { |
| 166 | // check for full name |
| 167 | GeneralNames fullName = point.getFullName(); |
| 168 | if (fullName == null) { |
| 169 | // check for relative name |
| 170 | RDN relativeName = point.getRelativeName(); |
| 171 | if (relativeName == null) { |
| 172 | return Collections.emptySet(); |
| 173 | } |
| 174 | try { |
| 175 | GeneralNames crlIssuers = point.getCRLIssuer(); |
| 176 | if (crlIssuers == null) { |
| 177 | fullName = getFullNames |
| 178 | ((X500Name) certImpl.getIssuerDN(), relativeName); |
| 179 | } else { |
| 180 | // should only be one CRL Issuer |
| 181 | if (crlIssuers.size() != 1) { |
| 182 | return Collections.emptySet(); |
| 183 | } else { |
| 184 | fullName = getFullNames |
| 185 | ((X500Name) crlIssuers.get(0).getName(), relativeName); |
| 186 | } |
| 187 | } |
| 188 | } catch (IOException ioe) { |
| 189 | return Collections.emptySet(); |
| 190 | } |
| 191 | } |
| 192 | Collection<X509CRL> possibleCRLs = new ArrayList<X509CRL>(); |
| 193 | Collection<X509CRL> crls = new ArrayList<X509CRL>(2); |
| 194 | for (Iterator<GeneralName> t = fullName.iterator(); t.hasNext(); ) { |
| 195 | GeneralName name = t.next(); |
| 196 | if (name.getType() == GeneralNameInterface.NAME_DIRECTORY) { |
| 197 | X500Name x500Name = (X500Name) name.getName(); |
| 198 | possibleCRLs.addAll( |
| 199 | getCRLs(x500Name, certImpl.getIssuerX500Principal(), |
| 200 | certStores)); |
| 201 | } else if (name.getType() == GeneralNameInterface.NAME_URI) { |
| 202 | URIName uriName = (URIName)name.getName(); |
| 203 | X509CRL crl = getCRL(uriName); |
| 204 | if (crl != null) { |
| 205 | possibleCRLs.add(crl); |
| 206 | } |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | for (X509CRL crl : possibleCRLs) { |
| 211 | try { |
| 212 | // make sure issuer is not set |
| 213 | // we check the issuer in verifyCRLs method |
| 214 | selector.setIssuerNames(null); |
| 215 | if (selector.match(crl) && verifyCRL(certImpl, point, crl, |
| 216 | reasonsMask, signFlag, prevKey, provider, anchor, |
| 217 | certStores)) { |
| 218 | crls.add(crl); |
| 219 | } |
| 220 | } catch (Exception e) { |
| 221 | // don't add the CRL |
| 222 | if (debug != null) { |
| 223 | debug.println("Exception verifying CRL: " + e.getMessage()); |
| 224 | e.printStackTrace(); |
| 225 | } |
| 226 | } |
| 227 | } |
| 228 | return crls; |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * Download CRL from given URI. |
| 233 | */ |
| 234 | private X509CRL getCRL(URIName name) { |
| 235 | URI uri = name.getURI(); |
| 236 | if (debug != null) { |
| 237 | debug.println("Trying to fetch CRL from DP " + uri); |
| 238 | } |
| 239 | try { |
| 240 | CertStore ucs = URICertStore.getInstance |
| 241 | (new URICertStore.URICertStoreParameters(uri)); |
| 242 | Collection<? extends CRL> crls = ucs.getCRLs(null); |
| 243 | if (crls.isEmpty()) { |
| 244 | return null; |
| 245 | } else { |
| 246 | return (X509CRL) crls.iterator().next(); |
| 247 | } |
| 248 | } catch (Exception e) { |
| 249 | if (debug != null) { |
| 250 | debug.println("Exception getting CRL from CertStore: " + e); |
| 251 | e.printStackTrace(); |
| 252 | } |
| 253 | } |
| 254 | return null; |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * Fetch CRLs from certStores. |
| 259 | */ |
| 260 | private Collection<X509CRL> getCRLs(X500Name name, |
| 261 | X500Principal certIssuer, List<CertStore> certStores) |
| 262 | { |
| 263 | if (debug != null) { |
| 264 | debug.println("Trying to fetch CRL from DP " + name); |
| 265 | } |
| 266 | X509CRLSelector xcs = new X509CRLSelector(); |
| 267 | xcs.addIssuer(name.asX500Principal()); |
| 268 | xcs.addIssuer(certIssuer); |
| 269 | Collection<X509CRL> crls = new ArrayList<X509CRL>(); |
| 270 | for (CertStore store : certStores) { |
| 271 | try { |
| 272 | for (CRL crl : store.getCRLs(xcs)) { |
| 273 | crls.add((X509CRL)crl); |
| 274 | } |
| 275 | } catch (CertStoreException cse) { |
| 276 | // don't add the CRL |
| 277 | if (debug != null) { |
| 278 | debug.println("Non-fatal exception while retrieving " + |
| 279 | "CRLs: " + cse); |
| 280 | cse.printStackTrace(); |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | return crls; |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * Verifies a CRL for the given certificate's Distribution Point to |
| 289 | * ensure it is appropriate for checking the revocation status. |
| 290 | * |
| 291 | * @param certImpl the certificate whose revocation status is being checked |
| 292 | * @param point one of the distribution points of the certificate |
| 293 | * @param crl the CRL |
| 294 | * @param reasonsMask the interim reasons mask |
| 295 | * @param signFlag true if prevKey can be used to verify the CRL |
| 296 | * @param prevKey the public key that verifies the certificate's signature |
| 297 | * @param provider the Signature provider to use |
| 298 | * @return true if ok, false if not |
| 299 | */ |
| 300 | boolean verifyCRL(X509CertImpl certImpl, DistributionPoint point, |
| 301 | X509CRL crl, boolean[] reasonsMask, boolean signFlag, |
| 302 | PublicKey prevKey, String provider, TrustAnchor anchor, |
| 303 | List<CertStore> certStores) throws CRLException, IOException { |
| 304 | boolean indirectCRL = false; |
| 305 | X509CRLImpl crlImpl = X509CRLImpl.toImpl(crl); |
| 306 | IssuingDistributionPointExtension idpExt = |
| 307 | crlImpl.getIssuingDistributionPointExtension(); |
| 308 | X500Name certIssuer = (X500Name) certImpl.getIssuerDN(); |
| 309 | X500Name crlIssuer = (X500Name) crlImpl.getIssuerDN(); |
| 310 | |
| 311 | // if crlIssuer is set, verify that it matches the issuer of the |
| 312 | // CRL and the CRL contains an IDP extension with the indirectCRL |
| 313 | // boolean asserted. Otherwise, verify that the CRL issuer matches the |
| 314 | // certificate issuer. |
| 315 | GeneralNames pointCrlIssuers = point.getCRLIssuer(); |
| 316 | X500Name pointCrlIssuer = null; |
| 317 | if (pointCrlIssuers != null) { |
| 318 | if (idpExt == null || |
| 319 | ((Boolean) idpExt.get |
| 320 | (IssuingDistributionPointExtension.INDIRECT_CRL)).equals |
| 321 | (Boolean.FALSE)) { |
| 322 | return false; |
| 323 | } |
| 324 | boolean match = false; |
| 325 | for (Iterator<GeneralName> t = pointCrlIssuers.iterator(); |
| 326 | !match && t.hasNext(); ) { |
| 327 | GeneralNameInterface name = t.next().getName(); |
| 328 | if (crlIssuer.equals(name) == true) { |
| 329 | pointCrlIssuer = (X500Name) name; |
| 330 | match = true; |
| 331 | } |
| 332 | } |
| 333 | if (match == false) { |
| 334 | return false; |
| 335 | } |
| 336 | indirectCRL = true; |
| 337 | } else if (crlIssuer.equals(certIssuer) == false) { |
| 338 | if (debug != null) { |
| 339 | debug.println("crl issuer does not equal cert issuer"); |
| 340 | } |
| 341 | return false; |
| 342 | } |
| 343 | |
| 344 | if (!indirectCRL && !signFlag) { |
| 345 | // cert's key cannot be used to verify the CRL |
| 346 | return false; |
| 347 | } |
| 348 | |
| 349 | if (idpExt != null) { |
| 350 | DistributionPointName idpPoint = (DistributionPointName) |
| 351 | idpExt.get(IssuingDistributionPointExtension.POINT); |
| 352 | if (idpPoint != null) { |
| 353 | GeneralNames idpNames = idpPoint.getFullName(); |
| 354 | if (idpNames == null) { |
| 355 | RDN relativeName = idpPoint.getRelativeName(); |
| 356 | if (relativeName == null) { |
| 357 | if (debug != null) { |
| 358 | debug.println("IDP must be relative or full DN"); |
| 359 | } |
| 360 | return false; |
| 361 | } |
| 362 | if (debug != null) { |
| 363 | debug.println("IDP relativeName:" + relativeName); |
| 364 | } |
| 365 | idpNames = getFullNames(crlIssuer, relativeName); |
| 366 | } |
| 367 | // if the DP name is present in the IDP CRL extension and the |
| 368 | // DP field is present in the DP, then verify that one of the |
| 369 | // names in the IDP matches one of the names in the DP |
| 370 | if (point.getFullName() != null || |
| 371 | point.getRelativeName() != null) { |
| 372 | GeneralNames pointNames = point.getFullName(); |
| 373 | if (pointNames == null) { |
| 374 | RDN relativeName = point.getRelativeName(); |
| 375 | if (relativeName == null) { |
| 376 | if (debug != null) { |
| 377 | debug.println("DP must be relative or full DN"); |
| 378 | } |
| 379 | return false; |
| 380 | } |
| 381 | if (debug != null) { |
| 382 | debug.println("DP relativeName:" + relativeName); |
| 383 | } |
| 384 | if (indirectCRL) { |
| 385 | if (pointCrlIssuers.size() != 1) { |
| 386 | // RFC 3280: there must be only 1 CRL issuer |
| 387 | // name when relativeName is present |
| 388 | if (debug != null) { |
| 389 | debug.println("must only be one CRL " + |
| 390 | "issuer when relative name present"); |
| 391 | } |
| 392 | return false; |
| 393 | } |
| 394 | pointNames = getFullNames |
| 395 | (pointCrlIssuer, relativeName); |
| 396 | } else { |
| 397 | pointNames = getFullNames(certIssuer, relativeName); |
| 398 | } |
| 399 | } |
| 400 | boolean match = false; |
| 401 | for (Iterator<GeneralName> i = idpNames.iterator(); |
| 402 | !match && i.hasNext(); ) { |
| 403 | GeneralNameInterface idpName = i.next().getName(); |
| 404 | if (debug != null) { |
| 405 | debug.println("idpName: " + idpName); |
| 406 | } |
| 407 | for (Iterator<GeneralName> p = pointNames.iterator(); |
| 408 | !match && p.hasNext(); ) { |
| 409 | GeneralNameInterface pointName = p.next().getName(); |
| 410 | if (debug != null) { |
| 411 | debug.println("pointName: " + pointName); |
| 412 | } |
| 413 | match = idpName.equals(pointName); |
| 414 | } |
| 415 | } |
| 416 | if (!match) { |
| 417 | if (debug != null) { |
| 418 | debug.println("IDP name does not match DP name"); |
| 419 | } |
| 420 | return false; |
| 421 | } |
| 422 | // if the DP name is present in the IDP CRL extension and the |
| 423 | // DP field is absent from the DP, then verify that one of the |
| 424 | // names in the IDP matches one of the names in the crlIssuer |
| 425 | // field of the DP |
| 426 | } else { |
| 427 | // verify that one of the names in the IDP matches one of |
| 428 | // the names in the cRLIssuer of the cert's DP |
| 429 | boolean match = false; |
| 430 | for (Iterator<GeneralName> t = pointCrlIssuers.iterator(); |
| 431 | !match && t.hasNext(); ) { |
| 432 | GeneralNameInterface crlIssuerName = t.next().getName(); |
| 433 | for (Iterator<GeneralName> i = idpNames.iterator(); |
| 434 | !match && i.hasNext(); ) { |
| 435 | GeneralNameInterface idpName = i.next().getName(); |
| 436 | match = crlIssuerName.equals(idpName); |
| 437 | } |
| 438 | } |
| 439 | if (!match) { |
| 440 | return false; |
| 441 | } |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | // if the onlyContainsUserCerts boolean is asserted, verify that the |
| 446 | // cert is not a CA cert |
| 447 | Boolean b = (Boolean) |
| 448 | idpExt.get(IssuingDistributionPointExtension.ONLY_USER_CERTS); |
| 449 | if (b.equals(Boolean.TRUE) && certImpl.getBasicConstraints() != -1) { |
| 450 | if (debug != null) { |
| 451 | debug.println("cert must be a EE cert"); |
| 452 | } |
| 453 | return false; |
| 454 | } |
| 455 | |
| 456 | // if the onlyContainsCACerts boolean is asserted, verify that the |
| 457 | // cert is a CA cert |
| 458 | b = (Boolean) |
| 459 | idpExt.get(IssuingDistributionPointExtension.ONLY_CA_CERTS); |
| 460 | if (b.equals(Boolean.TRUE) && certImpl.getBasicConstraints() == -1) { |
| 461 | if (debug != null) { |
| 462 | debug.println("cert must be a CA cert"); |
| 463 | } |
| 464 | return false; |
| 465 | } |
| 466 | |
| 467 | // verify that the onlyContainsAttributeCerts boolean is not |
| 468 | // asserted |
| 469 | b = (Boolean) idpExt.get |
| 470 | (IssuingDistributionPointExtension.ONLY_ATTRIBUTE_CERTS); |
| 471 | if (b.equals(Boolean.TRUE)) { |
| 472 | if (debug != null) { |
| 473 | debug.println("cert must not be an AA cert"); |
| 474 | } |
| 475 | return false; |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | // compute interim reasons mask |
| 480 | boolean[] interimReasonsMask = new boolean[9]; |
| 481 | ReasonFlags reasons = null; |
| 482 | if (idpExt != null) { |
| 483 | reasons = (ReasonFlags) |
| 484 | idpExt.get(IssuingDistributionPointExtension.REASONS); |
| 485 | } |
| 486 | |
| 487 | boolean[] pointReasonFlags = point.getReasonFlags(); |
| 488 | if (reasons != null) { |
| 489 | if (pointReasonFlags != null) { |
| 490 | // set interim reasons mask to the intersection of |
| 491 | // reasons in the DP and onlySomeReasons in the IDP |
| 492 | boolean[] idpReasonFlags = reasons.getFlags(); |
| 493 | for (int i = 0; i < idpReasonFlags.length; i++) { |
| 494 | if (idpReasonFlags[i] && pointReasonFlags[i]) { |
| 495 | interimReasonsMask[i] = true; |
| 496 | } |
| 497 | } |
| 498 | } else { |
| 499 | // set interim reasons mask to the value of |
| 500 | // onlySomeReasons in the IDP (and clone it since we may |
| 501 | // modify it) |
| 502 | interimReasonsMask = reasons.getFlags().clone(); |
| 503 | } |
| 504 | } else if (idpExt == null || reasons == null) { |
| 505 | if (pointReasonFlags != null) { |
| 506 | // set interim reasons mask to the value of DP reasons |
| 507 | interimReasonsMask = pointReasonFlags.clone(); |
| 508 | } else { |
| 509 | // set interim reasons mask to the special value all-reasons |
| 510 | interimReasonsMask = new boolean[9]; |
| 511 | Arrays.fill(interimReasonsMask, true); |
| 512 | } |
| 513 | } |
| 514 | |
| 515 | // verify that interim reasons mask includes one or more reasons |
| 516 | // not included in the reasons mask |
| 517 | boolean oneOrMore = false; |
| 518 | for (int i=0; i < interimReasonsMask.length && !oneOrMore; i++) { |
| 519 | if (!reasonsMask[i] && interimReasonsMask[i]) { |
| 520 | oneOrMore = true; |
| 521 | } |
| 522 | } |
| 523 | if (!oneOrMore) { |
| 524 | return false; |
| 525 | } |
| 526 | |
| 527 | // Obtain and validate the certification path for the complete |
| 528 | // CRL issuer (if indirect CRL). If a key usage extension is present |
| 529 | // in the CRL issuer's certificate, verify that the cRLSign bit is set. |
| 530 | if (indirectCRL) { |
| 531 | X509CertSelector certSel = new X509CertSelector(); |
| 532 | certSel.setSubject(crlIssuer.asX500Principal()); |
| 533 | boolean[] crlSign = {false,false,false,false,false,false,true}; |
| 534 | certSel.setKeyUsage(crlSign); |
| 535 | PKIXBuilderParameters params = null; |
| 536 | try { |
| 537 | params = new PKIXBuilderParameters |
| 538 | (Collections.singleton(anchor), certSel); |
| 539 | } catch (InvalidAlgorithmParameterException iape) { |
| 540 | throw new CRLException(iape); |
| 541 | } |
| 542 | params.setCertStores(certStores); |
| 543 | params.setSigProvider(provider); |
| 544 | try { |
| 545 | CertPathBuilder builder = CertPathBuilder.getInstance("PKIX"); |
| 546 | PKIXCertPathBuilderResult result = |
| 547 | (PKIXCertPathBuilderResult) builder.build(params); |
| 548 | prevKey = result.getPublicKey(); |
| 549 | } catch (Exception e) { |
| 550 | throw new CRLException(e); |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | // validate the signature on the CRL |
| 555 | try { |
| 556 | crl.verify(prevKey, provider); |
| 557 | } catch (Exception e) { |
| 558 | if (debug != null) { |
| 559 | debug.println("CRL signature failed to verify"); |
| 560 | } |
| 561 | return false; |
| 562 | } |
| 563 | |
| 564 | // reject CRL if any unresolved critical extensions remain in the CRL. |
| 565 | Set<String> unresCritExts = crl.getCriticalExtensionOIDs(); |
| 566 | // remove any that we have processed |
| 567 | if (unresCritExts != null) { |
| 568 | unresCritExts.remove |
| 569 | (PKIXExtensions.IssuingDistributionPoint_Id.toString()); |
| 570 | if (!unresCritExts.isEmpty()) { |
| 571 | if (debug != null) { |
| 572 | debug.println("Unrecognized critical extension(s) in CRL: " |
| 573 | + unresCritExts); |
| 574 | Iterator<String> i = unresCritExts.iterator(); |
| 575 | while (i.hasNext()) |
| 576 | debug.println(i.next()); |
| 577 | } |
| 578 | return false; |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | // update reasonsMask |
| 583 | for (int i=0; i < interimReasonsMask.length; i++) { |
| 584 | if (!reasonsMask[i] && interimReasonsMask[i]) { |
| 585 | reasonsMask[i] = true; |
| 586 | } |
| 587 | } |
| 588 | return true; |
| 589 | } |
| 590 | |
| 591 | /** |
| 592 | * Append relative name to the issuer name and return a new |
| 593 | * GeneralNames object. |
| 594 | */ |
| 595 | private GeneralNames getFullNames(X500Name issuer, RDN rdn) |
| 596 | throws IOException { |
| 597 | List<RDN> rdns = new ArrayList<RDN>(issuer.rdns()); |
| 598 | rdns.add(rdn); |
| 599 | X500Name fullName = new X500Name(rdns.toArray(new RDN[0])); |
| 600 | GeneralNames fullNames = new GeneralNames(); |
| 601 | fullNames.add(new GeneralName(fullName)); |
| 602 | return fullNames; |
| 603 | } |
| 604 | } |