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| 1 | +/* | |
| 2 | + * Copyright (c) 2000, 2011, 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.util.*; | |
| 30 | + | |
| 31 | +import java.security.GeneralSecurityException; | |
| 32 | +import java.security.InvalidKeyException; | |
| 33 | +import java.security.cert.Certificate; | |
| 34 | +import java.security.cert.CertificateException; | |
| 35 | +import java.security.cert.CertPathValidatorException; | |
| 36 | +import java.security.cert.PKIXReason; | |
| 37 | +import java.security.cert.CertStore; | |
| 38 | +import java.security.cert.CertStoreException; | |
| 39 | +import java.security.cert.PKIXBuilderParameters; | |
| 40 | +import java.security.cert.PKIXCertPathChecker; | |
| 41 | +import java.security.cert.TrustAnchor; | |
| 42 | +import java.security.cert.X509Certificate; | |
| 43 | +import java.security.cert.X509CertSelector; | |
| 44 | +import javax.security.auth.x500.X500Principal; | |
| 45 | + | |
| 46 | +import sun.security.util.Debug; | |
| 47 | +import sun.security.util.DerOutputStream; | |
| 48 | +import sun.security.x509.AccessDescription; | |
| 49 | +import sun.security.x509.AuthorityInfoAccessExtension; | |
| 50 | +import sun.security.x509.PKIXExtensions; | |
| 51 | +import sun.security.x509.PolicyMappingsExtension; | |
| 52 | +import sun.security.x509.X500Name; | |
| 53 | +import sun.security.x509.X509CertImpl; | |
| 54 | +import sun.security.x509.X509CRLImpl; | |
| 55 | +import sun.security.x509.AuthorityKeyIdentifierExtension; | |
| 56 | +import sun.security.x509.KeyIdentifier; | |
| 57 | +import sun.security.x509.SubjectKeyIdentifierExtension; | |
| 58 | +import sun.security.x509.SerialNumber; | |
| 59 | +import sun.security.x509.GeneralNames; | |
| 60 | +import sun.security.x509.GeneralName; | |
| 61 | +import sun.security.x509.GeneralNameInterface; | |
| 62 | +import java.math.BigInteger; | |
| 63 | + | |
| 64 | +/** | |
| 65 | + * This class represents a forward builder, which is able to retrieve | |
| 66 | + * matching certificates from CertStores and verify a particular certificate | |
| 67 | + * against a ForwardState. | |
| 68 | + * | |
| 69 | + * @since 1.4 | |
| 70 | + * @author Yassir Elley | |
| 71 | + * @author Sean Mullan | |
| 72 | + */ | |
| 73 | +class ForwardBuilder extends Builder { | |
| 74 | + | |
| 75 | + private static final Debug debug = Debug.getInstance("certpath"); | |
| 76 | + private final Set<X509Certificate> trustedCerts; | |
| 77 | + private final Set<X500Principal> trustedSubjectDNs; | |
| 78 | + private final Set<TrustAnchor> trustAnchors; | |
| 79 | + private X509CertSelector eeSelector; | |
| 80 | + private AdaptableX509CertSelector caSelector; | |
| 81 | + private X509CertSelector caTargetSelector; | |
| 82 | + TrustAnchor trustAnchor; | |
| 83 | + private Comparator<X509Certificate> comparator; | |
| 84 | + private boolean searchAllCertStores = true; | |
| 85 | + private boolean onlyEECert = false; | |
| 86 | + | |
| 87 | + /** | |
| 88 | + * Initialize the builder with the input parameters. | |
| 89 | + * | |
| 90 | + * @param params the parameter set used to build a certification path | |
| 91 | + */ | |
| 92 | + ForwardBuilder(PKIXBuilderParameters buildParams, | |
| 93 | + X500Principal targetSubjectDN, boolean searchAllCertStores, | |
| 94 | + boolean onlyEECert) | |
| 95 | + { | |
| 96 | + super(buildParams, targetSubjectDN); | |
| 97 | + | |
| 98 | + // populate sets of trusted certificates and subject DNs | |
| 99 | + trustAnchors = buildParams.getTrustAnchors(); | |
| 100 | + trustedCerts = new HashSet<X509Certificate>(trustAnchors.size()); | |
| 101 | + trustedSubjectDNs = new HashSet<X500Principal>(trustAnchors.size()); | |
| 102 | + for (TrustAnchor anchor : trustAnchors) { | |
| 103 | + X509Certificate trustedCert = anchor.getTrustedCert(); | |
| 104 | + if (trustedCert != null) { | |
| 105 | + trustedCerts.add(trustedCert); | |
| 106 | + trustedSubjectDNs.add(trustedCert.getSubjectX500Principal()); | |
| 107 | + } else { | |
| 108 | + trustedSubjectDNs.add(anchor.getCA()); | |
| 109 | + } | |
| 110 | + } | |
| 111 | + comparator = new PKIXCertComparator(trustedSubjectDNs); | |
| 112 | + this.searchAllCertStores = searchAllCertStores; | |
| 113 | + this.onlyEECert = onlyEECert; | |
| 114 | + } | |
| 115 | + | |
| 116 | + /** | |
| 117 | + * Retrieves all certs from the specified CertStores that satisfy the | |
| 118 | + * requirements specified in the parameters and the current | |
| 119 | + * PKIX state (name constraints, policy constraints, etc). | |
| 120 | + * | |
| 121 | + * @param currentState the current state. | |
| 122 | + * Must be an instance of <code>ForwardState</code> | |
| 123 | + * @param certStores list of CertStores | |
| 124 | + */ | |
| 125 | + Collection<X509Certificate> getMatchingCerts | |
| 126 | + (State currentState, List<CertStore> certStores) | |
| 127 | + throws CertStoreException, CertificateException, IOException | |
| 128 | + { | |
| 129 | + if (debug != null) { | |
| 130 | + debug.println("ForwardBuilder.getMatchingCerts()..."); | |
| 131 | + } | |
| 132 | + | |
| 133 | + ForwardState currState = (ForwardState) currentState; | |
| 134 | + | |
| 135 | + /* | |
| 136 | + * We store certs in a Set because we don't want duplicates. | |
| 137 | + * As each cert is added, it is sorted based on the PKIXCertComparator | |
| 138 | + * algorithm. | |
| 139 | + */ | |
| 140 | + Set<X509Certificate> certs = new TreeSet<X509Certificate>(comparator); | |
| 141 | + | |
| 142 | + /* | |
| 143 | + * Only look for EE certs if search has just started. | |
| 144 | + */ | |
| 145 | + if (currState.isInitial()) { | |
| 146 | + getMatchingEECerts(currState, certStores, certs); | |
| 147 | + } | |
| 148 | + getMatchingCACerts(currState, certStores, certs); | |
| 149 | + | |
| 150 | + return certs; | |
| 151 | + } | |
| 152 | + | |
| 153 | + /* | |
| 154 | + * Retrieves all end-entity certificates which satisfy constraints | |
| 155 | + * and requirements specified in the parameters and PKIX state. | |
| 156 | + */ | |
| 157 | + private void getMatchingEECerts(ForwardState currentState, | |
| 158 | + List<CertStore> certStores, Collection<X509Certificate> eeCerts) | |
| 159 | + throws IOException { | |
| 160 | + | |
| 161 | + if (debug != null) { | |
| 162 | + debug.println("ForwardBuilder.getMatchingEECerts()..."); | |
| 163 | + } | |
| 164 | + /* | |
| 165 | + * Compose a certificate matching rule to filter out | |
| 166 | + * certs which don't satisfy constraints | |
| 167 | + * | |
| 168 | + * First, retrieve clone of current target cert constraints, | |
| 169 | + * and then add more selection criteria based on current validation | |
| 170 | + * state. Since selector never changes, cache local copy & reuse. | |
| 171 | + */ | |
| 172 | + if (eeSelector == null) { | |
| 173 | + eeSelector = (X509CertSelector) targetCertConstraints.clone(); | |
| 174 | + | |
| 175 | + /* | |
| 176 | + * Match on certificate validity date | |
| 177 | + */ | |
| 178 | + eeSelector.setCertificateValid(date); | |
| 179 | + | |
| 180 | + /* | |
| 181 | + * Policy processing optimizations | |
| 182 | + */ | |
| 183 | + if (buildParams.isExplicitPolicyRequired()) { | |
| 184 | + eeSelector.setPolicy(getMatchingPolicies()); | |
| 185 | + } | |
| 186 | + /* | |
| 187 | + * Require EE certs | |
| 188 | + */ | |
| 189 | + eeSelector.setBasicConstraints(-2); | |
| 190 | + } | |
| 191 | + | |
| 192 | + /* Retrieve matching EE certs from CertStores */ | |
| 193 | + addMatchingCerts(eeSelector, certStores, eeCerts, searchAllCertStores); | |
| 194 | + } | |
| 195 | + | |
| 196 | + /** | |
| 197 | + * Retrieves all CA certificates which satisfy constraints | |
| 198 | + * and requirements specified in the parameters and PKIX state. | |
| 199 | + */ | |
| 200 | + private void getMatchingCACerts(ForwardState currentState, | |
| 201 | + List<CertStore> certStores, Collection<X509Certificate> caCerts) | |
| 202 | + throws IOException { | |
| 203 | + | |
| 204 | + if (debug != null) { | |
| 205 | + debug.println("ForwardBuilder.getMatchingCACerts()..."); | |
| 206 | + } | |
| 207 | + int initialSize = caCerts.size(); | |
| 208 | + | |
| 209 | + /* | |
| 210 | + * Compose a CertSelector to filter out | |
| 211 | + * certs which do not satisfy requirements. | |
| 212 | + */ | |
| 213 | + X509CertSelector sel = null; | |
| 214 | + | |
| 215 | + if (currentState.isInitial()) { | |
| 216 | + if (targetCertConstraints.getBasicConstraints() == -2) { | |
| 217 | + // no need to continue: this means we never can match a CA cert | |
| 218 | + return; | |
| 219 | + } | |
| 220 | + | |
| 221 | + /* This means a CA is the target, so match on same stuff as | |
| 222 | + * getMatchingEECerts | |
| 223 | + */ | |
| 224 | + if (debug != null) { | |
| 225 | + debug.println("ForwardBuilder.getMatchingCACerts(): ca is target"); | |
| 226 | + } | |
| 227 | + | |
| 228 | + if (caTargetSelector == null) { | |
| 229 | + caTargetSelector = (X509CertSelector) | |
| 230 | + targetCertConstraints.clone(); | |
| 231 | + | |
| 232 | + /* | |
| 233 | + * Since we don't check the validity period of trusted | |
| 234 | + * certificates, please don't set the certificate valid | |
| 235 | + * criterion unless the trusted certificate matching is | |
| 236 | + * completed. | |
| 237 | + */ | |
| 238 | + | |
| 239 | + /* | |
| 240 | + * Policy processing optimizations | |
| 241 | + */ | |
| 242 | + if (buildParams.isExplicitPolicyRequired()) | |
| 243 | + caTargetSelector.setPolicy(getMatchingPolicies()); | |
| 244 | + } | |
| 245 | + | |
| 246 | + sel = caTargetSelector; | |
| 247 | + } else { | |
| 248 | + | |
| 249 | + if (caSelector == null) { | |
| 250 | + caSelector = new AdaptableX509CertSelector(); | |
| 251 | + | |
| 252 | + /* | |
| 253 | + * Since we don't check the validity period of trusted | |
| 254 | + * certificates, please don't set the certificate valid | |
| 255 | + * criterion unless the trusted certificate matching is | |
| 256 | + * completed. | |
| 257 | + */ | |
| 258 | + | |
| 259 | + /* | |
| 260 | + * Policy processing optimizations | |
| 261 | + */ | |
| 262 | + if (buildParams.isExplicitPolicyRequired()) | |
| 263 | + caSelector.setPolicy(getMatchingPolicies()); | |
| 264 | + } | |
| 265 | + | |
| 266 | + /* | |
| 267 | + * Match on subject (issuer of previous cert) | |
| 268 | + */ | |
| 269 | + caSelector.setSubject(currentState.issuerDN); | |
| 270 | + | |
| 271 | + /* | |
| 272 | + * Match on subjectNamesTraversed (both DNs and AltNames) | |
| 273 | + * (checks that current cert's name constraints permit it | |
| 274 | + * to certify all the DNs and AltNames that have been traversed) | |
| 275 | + */ | |
| 276 | + CertPathHelper.setPathToNames | |
| 277 | + (caSelector, currentState.subjectNamesTraversed); | |
| 278 | + | |
| 279 | + /* | |
| 280 | + * Facilitate certification path construction with authority | |
| 281 | + * key identifier and subject key identifier. | |
| 282 | + */ | |
| 283 | + AuthorityKeyIdentifierExtension akidext = | |
| 284 | + currentState.cert.getAuthorityKeyIdentifierExtension(); | |
| 285 | + caSelector.parseAuthorityKeyIdentifierExtension(akidext); | |
| 286 | + | |
| 287 | + /* | |
| 288 | + * check the validity period | |
| 289 | + */ | |
| 290 | + caSelector.setValidityPeriod(currentState.cert.getNotBefore(), | |
| 291 | + currentState.cert.getNotAfter()); | |
| 292 | + | |
| 293 | + sel = caSelector; | |
| 294 | + } | |
| 295 | + | |
| 296 | + /* | |
| 297 | + * For compatibility, conservatively, we don't check the path | |
| 298 | + * length constraint of trusted anchors. Please don't set the | |
| 299 | + * basic constraints criterion unless the trusted certificate | |
| 300 | + * matching is completed. | |
| 301 | + */ | |
| 302 | + sel.setBasicConstraints(-1); | |
| 303 | + | |
| 304 | + for (X509Certificate trustedCert : trustedCerts) { | |
| 305 | + if (sel.match(trustedCert)) { | |
| 306 | + if (debug != null) { | |
| 307 | + debug.println("ForwardBuilder.getMatchingCACerts: " | |
| 308 | + + "found matching trust anchor"); | |
| 309 | + } | |
| 310 | + if (caCerts.add(trustedCert) && !searchAllCertStores) { | |
| 311 | + return; | |
| 312 | + } | |
| 313 | + } | |
| 314 | + } | |
| 315 | + | |
| 316 | + /* | |
| 317 | + * The trusted certificate matching is completed. We need to match | |
| 318 | + * on certificate validity date. | |
| 319 | + */ | |
| 320 | + sel.setCertificateValid(date); | |
| 321 | + | |
| 322 | + /* | |
| 323 | + * Require CA certs with a pathLenConstraint that allows | |
| 324 | + * at least as many CA certs that have already been traversed | |
| 325 | + */ | |
| 326 | + sel.setBasicConstraints(currentState.traversedCACerts); | |
| 327 | + | |
| 328 | + /* | |
| 329 | + * If we have already traversed as many CA certs as the maxPathLength | |
| 330 | + * will allow us to, then we don't bother looking through these | |
| 331 | + * certificate pairs. If maxPathLength has a value of -1, this | |
| 332 | + * means it is unconstrained, so we always look through the | |
| 333 | + * certificate pairs. | |
| 334 | + */ | |
| 335 | + if (currentState.isInitial() || | |
| 336 | + (buildParams.getMaxPathLength() == -1) || | |
| 337 | + (buildParams.getMaxPathLength() > currentState.traversedCACerts)) | |
| 338 | + { | |
| 339 | + if (addMatchingCerts(sel, certStores, | |
| 340 | + caCerts, searchAllCertStores) && !searchAllCertStores) { | |
| 341 | + return; | |
| 342 | + } | |
| 343 | + } | |
| 344 | + | |
| 345 | + if (!currentState.isInitial() && Builder.USE_AIA) { | |
| 346 | + // check for AuthorityInformationAccess extension | |
| 347 | + AuthorityInfoAccessExtension aiaExt = | |
| 348 | + currentState.cert.getAuthorityInfoAccessExtension(); | |
| 349 | + if (aiaExt != null) { | |
| 350 | + getCerts(aiaExt, caCerts); | |
| 351 | + } | |
| 352 | + } | |
| 353 | + | |
| 354 | + if (debug != null) { | |
| 355 | + int numCerts = caCerts.size() - initialSize; | |
| 356 | + debug.println("ForwardBuilder.getMatchingCACerts: found " + | |
| 357 | + numCerts + " CA certs"); | |
| 358 | + } | |
| 359 | + } | |
| 360 | + | |
| 361 | + /** | |
| 362 | + * Download Certificates from the given AIA and add them to the | |
| 363 | + * specified Collection. | |
| 364 | + */ | |
| 365 | + private boolean getCerts(AuthorityInfoAccessExtension aiaExt, | |
| 366 | + Collection<X509Certificate> certs) { | |
| 367 | + if (Builder.USE_AIA == false) { | |
| 368 | + return false; | |
| 369 | + } | |
| 370 | + List<AccessDescription> adList = aiaExt.getAccessDescriptions(); | |
| 371 | + if (adList == null || adList.isEmpty()) { | |
| 372 | + return false; | |
| 373 | + } | |
| 374 | + | |
| 375 | + boolean add = false; | |
| 376 | + for (AccessDescription ad : adList) { | |
| 377 | + CertStore cs = URICertStore.getInstance(ad); | |
| 378 | + try { | |
| 379 | + if (certs.addAll((Collection<X509Certificate>) | |
| 380 | + cs.getCertificates(caSelector))) { | |
| 381 | + add = true; | |
| 382 | + if (!searchAllCertStores) { | |
| 383 | + return true; | |
| 384 | + } | |
| 385 | + } | |
| 386 | + } catch (CertStoreException cse) { | |
| 387 | + if (debug != null) { | |
| 388 | + debug.println("exception getting certs from CertStore:"); | |
| 389 | + cse.printStackTrace(); | |
| 390 | + } | |
| 391 | + continue; | |
| 392 | + } | |
| 393 | + } | |
| 394 | + return add; | |
| 395 | + } | |
| 396 | + | |
| 397 | + /** | |
| 398 | + * This inner class compares 2 PKIX certificates according to which | |
| 399 | + * should be tried first when building a path from the target. | |
| 400 | + * The preference order is as follows: | |
| 401 | + * | |
| 402 | + * Given trusted certificate(s): | |
| 403 | + * Subject:ou=D,ou=C,o=B,c=A | |
| 404 | + * | |
| 405 | + * Preference order for current cert: | |
| 406 | + * | |
| 407 | + * 1) Issuer matches a trusted subject | |
| 408 | + * Issuer: ou=D,ou=C,o=B,c=A | |
| 409 | + * | |
| 410 | + * 2) Issuer is a descendant of a trusted subject (in order of | |
| 411 | + * number of links to the trusted subject) | |
| 412 | + * a) Issuer: ou=E,ou=D,ou=C,o=B,c=A [links=1] | |
| 413 | + * b) Issuer: ou=F,ou=E,ou=D,ou=C,ou=B,c=A [links=2] | |
| 414 | + * | |
| 415 | + * 3) Issuer is an ancestor of a trusted subject (in order of number of | |
| 416 | + * links to the trusted subject) | |
| 417 | + * a) Issuer: ou=C,o=B,c=A [links=1] | |
| 418 | + * b) Issuer: o=B,c=A [links=2] | |
| 419 | + * | |
| 420 | + * 4) Issuer is in the same namespace as a trusted subject (in order of | |
| 421 | + * number of links to the trusted subject) | |
| 422 | + * a) Issuer: ou=G,ou=C,o=B,c=A [links=2] | |
| 423 | + * b) Issuer: ou=H,o=B,c=A [links=3] | |
| 424 | + * | |
| 425 | + * 5) Issuer is an ancestor of certificate subject (in order of number | |
| 426 | + * of links to the certificate subject) | |
| 427 | + * a) Issuer: ou=K,o=J,c=A | |
| 428 | + * Subject: ou=L,ou=K,o=J,c=A | |
| 429 | + * b) Issuer: o=J,c=A | |
| 430 | + * Subject: ou=L,ou=K,0=J,c=A | |
| 431 | + * | |
| 432 | + * 6) Any other certificates | |
| 433 | + */ | |
| 434 | + static class PKIXCertComparator implements Comparator<X509Certificate> { | |
| 435 | + | |
| 436 | + final static String METHOD_NME = "PKIXCertComparator.compare()"; | |
| 437 | + | |
| 438 | + private final Set<X500Principal> trustedSubjectDNs; | |
| 439 | + | |
| 440 | + PKIXCertComparator(Set<X500Principal> trustedSubjectDNs) { | |
| 441 | + this.trustedSubjectDNs = trustedSubjectDNs; | |
| 442 | + } | |
| 443 | + | |
| 444 | + /** | |
| 445 | + * @param oCert1 First X509Certificate to be compared | |
| 446 | + * @param oCert2 Second X509Certificate to be compared | |
| 447 | + * @return -1 if oCert1 is preferable to oCert2, or | |
| 448 | + * if oCert1 and oCert2 are equally preferable (in this | |
| 449 | + * case it doesn't matter which is preferable, but we don't | |
| 450 | + * return 0 because the comparator would behave strangely | |
| 451 | + * when used in a SortedSet). | |
| 452 | + * 1 if oCert2 is preferable to oCert1 | |
| 453 | + * 0 if oCert1.equals(oCert2). We only return 0 if the | |
| 454 | + * certs are equal so that this comparator behaves | |
| 455 | + * correctly when used in a SortedSet. | |
| 456 | + * @throws ClassCastException if either argument is not of type | |
| 457 | + * X509Certificate | |
| 458 | + */ | |
| 459 | + public int compare(X509Certificate oCert1, X509Certificate oCert2) { | |
| 460 | + | |
| 461 | + // if certs are the same, return 0 | |
| 462 | + if (oCert1.equals(oCert2)) return 0; | |
| 463 | + | |
| 464 | + X500Principal cIssuer1 = oCert1.getIssuerX500Principal(); | |
| 465 | + X500Principal cIssuer2 = oCert2.getIssuerX500Principal(); | |
| 466 | + X500Name cIssuer1Name = X500Name.asX500Name(cIssuer1); | |
| 467 | + X500Name cIssuer2Name = X500Name.asX500Name(cIssuer2); | |
| 468 | + | |
| 469 | + if (debug != null) { | |
| 470 | + debug.println(METHOD_NME + " o1 Issuer: " + cIssuer1); | |
| 471 | + debug.println(METHOD_NME + " o2 Issuer: " + cIssuer2); | |
| 472 | + } | |
| 473 | + | |
| 474 | + /* If one cert's issuer matches a trusted subject, then it is | |
| 475 | + * preferable. | |
| 476 | + */ | |
| 477 | + if (debug != null) { | |
| 478 | + debug.println(METHOD_NME + " MATCH TRUSTED SUBJECT TEST..."); | |
| 479 | + } | |
| 480 | + | |
| 481 | + boolean m1 = trustedSubjectDNs.contains(cIssuer1); | |
| 482 | + boolean m2 = trustedSubjectDNs.contains(cIssuer2); | |
| 483 | + if (debug != null) { | |
| 484 | + debug.println(METHOD_NME + " m1: " + m1); | |
| 485 | + debug.println(METHOD_NME + " m2: " + m2); | |
| 486 | + } | |
| 487 | + if (m1 && m2) { | |
| 488 | + return -1; | |
| 489 | + } else if (m1) { | |
| 490 | + return -1; | |
| 491 | + } else if (m2) { | |
| 492 | + return 1; | |
| 493 | + } | |
| 494 | + | |
| 495 | + /* If one cert's issuer is a naming descendant of a trusted subject, | |
| 496 | + * then it is preferable, in order of increasing naming distance. | |
| 497 | + */ | |
| 498 | + if (debug != null) { | |
| 499 | + debug.println(METHOD_NME + " NAMING DESCENDANT TEST..."); | |
| 500 | + } | |
| 501 | + for (X500Principal tSubject : trustedSubjectDNs) { | |
| 502 | + X500Name tSubjectName = X500Name.asX500Name(tSubject); | |
| 503 | + int distanceTto1 = | |
| 504 | + Builder.distance(tSubjectName, cIssuer1Name, -1); | |
| 505 | + int distanceTto2 = | |
| 506 | + Builder.distance(tSubjectName, cIssuer2Name, -1); | |
| 507 | + if (debug != null) { | |
| 508 | + debug.println(METHOD_NME +" distanceTto1: " + distanceTto1); | |
| 509 | + debug.println(METHOD_NME +" distanceTto2: " + distanceTto2); | |
| 510 | + } | |
| 511 | + if (distanceTto1 > 0 || distanceTto2 > 0) { | |
| 512 | + if (distanceTto1 == distanceTto2) { | |
| 513 | + return -1; | |
| 514 | + } else if (distanceTto1 > 0 && distanceTto2 <= 0) { | |
| 515 | + return -1; | |
| 516 | + } else if (distanceTto1 <= 0 && distanceTto2 > 0) { | |
| 517 | + return 1; | |
| 518 | + } else if (distanceTto1 < distanceTto2) { | |
| 519 | + return -1; | |
| 520 | + } else { // distanceTto1 > distanceTto2 | |
| 521 | + return 1; | |
| 522 | + } | |
| 523 | + } | |
| 524 | + } | |
| 525 | + | |
| 526 | + /* If one cert's issuer is a naming ancestor of a trusted subject, | |
| 527 | + * then it is preferable, in order of increasing naming distance. | |
| 528 | + */ | |
| 529 | + if (debug != null) { | |
| 530 | + debug.println(METHOD_NME + " NAMING ANCESTOR TEST..."); | |
| 531 | + } | |
| 532 | + for (X500Principal tSubject : trustedSubjectDNs) { | |
| 533 | + X500Name tSubjectName = X500Name.asX500Name(tSubject); | |
| 534 | + | |
| 535 | + int distanceTto1 = Builder.distance | |
| 536 | + (tSubjectName, cIssuer1Name, Integer.MAX_VALUE); | |
| 537 | + int distanceTto2 = Builder.distance | |
| 538 | + (tSubjectName, cIssuer2Name, Integer.MAX_VALUE); | |
| 539 | + if (debug != null) { | |
| 540 | + debug.println(METHOD_NME +" distanceTto1: " + distanceTto1); | |
| 541 | + debug.println(METHOD_NME +" distanceTto2: " + distanceTto2); | |
| 542 | + } | |
| 543 | + if (distanceTto1 < 0 || distanceTto2 < 0) { | |
| 544 | + if (distanceTto1 == distanceTto2) { | |
| 545 | + return -1; | |
| 546 | + } else if (distanceTto1 < 0 && distanceTto2 >= 0) { | |
| 547 | + return -1; | |
| 548 | + } else if (distanceTto1 >= 0 && distanceTto2 < 0) { | |
| 549 | + return 1; | |
| 550 | + } else if (distanceTto1 > distanceTto2) { | |
| 551 | + return -1; | |
| 552 | + } else { | |
| 553 | + return 1; | |
| 554 | + } | |
| 555 | + } | |
| 556 | + } | |
| 557 | + | |
| 558 | + /* If one cert's issuer is in the same namespace as a trusted | |
| 559 | + * subject, then it is preferable, in order of increasing naming | |
| 560 | + * distance. | |
| 561 | + */ | |
| 562 | + if (debug != null) { | |
| 563 | + debug.println(METHOD_NME +" SAME NAMESPACE AS TRUSTED TEST..."); | |
| 564 | + } | |
| 565 | + for (X500Principal tSubject : trustedSubjectDNs) { | |
| 566 | + X500Name tSubjectName = X500Name.asX500Name(tSubject); | |
| 567 | + X500Name tAo1 = tSubjectName.commonAncestor(cIssuer1Name); | |
| 568 | + X500Name tAo2 = tSubjectName.commonAncestor(cIssuer2Name); | |
| 569 | + if (debug != null) { | |
| 570 | + debug.println(METHOD_NME +" tAo1: " + String.valueOf(tAo1)); | |
| 571 | + debug.println(METHOD_NME +" tAo2: " + String.valueOf(tAo2)); | |
| 572 | + } | |
| 573 | + if (tAo1 != null || tAo2 != null) { | |
| 574 | + if (tAo1 != null && tAo2 != null) { | |
| 575 | + int hopsTto1 = Builder.hops | |
| 576 | + (tSubjectName, cIssuer1Name, Integer.MAX_VALUE); | |
| 577 | + int hopsTto2 = Builder.hops | |
| 578 | + (tSubjectName, cIssuer2Name, Integer.MAX_VALUE); | |
| 579 | + if (debug != null) { | |
| 580 | + debug.println(METHOD_NME +" hopsTto1: " + hopsTto1); | |
| 581 | + debug.println(METHOD_NME +" hopsTto2: " + hopsTto2); | |
| 582 | + } | |
| 583 | + if (hopsTto1 == hopsTto2) { | |
| 584 | + } else if (hopsTto1 > hopsTto2) { | |
| 585 | + return 1; | |
| 586 | + } else { // hopsTto1 < hopsTto2 | |
| 587 | + return -1; | |
| 588 | + } | |
| 589 | + } else if (tAo1 == null) { | |
| 590 | + return 1; | |
| 591 | + } else { | |
| 592 | + return -1; | |
| 593 | + } | |
| 594 | + } | |
| 595 | + } | |
| 596 | + | |
| 597 | + | |
| 598 | + /* If one cert's issuer is an ancestor of that cert's subject, | |
| 599 | + * then it is preferable, in order of increasing naming distance. | |
| 600 | + */ | |
| 601 | + if (debug != null) { | |
| 602 | + debug.println(METHOD_NME+" CERT ISSUER/SUBJECT COMPARISON TEST..."); | |
| 603 | + } | |
| 604 | + X500Principal cSubject1 = oCert1.getSubjectX500Principal(); | |
| 605 | + X500Principal cSubject2 = oCert2.getSubjectX500Principal(); | |
| 606 | + X500Name cSubject1Name = X500Name.asX500Name(cSubject1); | |
| 607 | + X500Name cSubject2Name = X500Name.asX500Name(cSubject2); | |
| 608 | + | |
| 609 | + if (debug != null) { | |
| 610 | + debug.println(METHOD_NME + " o1 Subject: " + cSubject1); | |
| 611 | + debug.println(METHOD_NME + " o2 Subject: " + cSubject2); | |
| 612 | + } | |
| 613 | + int distanceStoI1 = Builder.distance | |
| 614 | + (cSubject1Name, cIssuer1Name, Integer.MAX_VALUE); | |
| 615 | + int distanceStoI2 = Builder.distance | |
| 616 | + (cSubject2Name, cIssuer2Name, Integer.MAX_VALUE); | |
| 617 | + if (debug != null) { | |
| 618 | + debug.println(METHOD_NME + " distanceStoI1: " + distanceStoI1); | |
| 619 | + debug.println(METHOD_NME + " distanceStoI2: " + distanceStoI2); | |
| 620 | + } | |
| 621 | + if (distanceStoI2 > distanceStoI1) { | |
| 622 | + return -1; | |
| 623 | + } else if (distanceStoI2 < distanceStoI1) { | |
| 624 | + return 1; | |
| 625 | + } | |
| 626 | + | |
| 627 | + /* Otherwise, certs are equally preferable. | |
| 628 | + */ | |
| 629 | + if (debug != null) { | |
| 630 | + debug.println(METHOD_NME + " no tests matched; RETURN 0"); | |
| 631 | + } | |
| 632 | + return -1; | |
| 633 | + } | |
| 634 | + } | |
| 635 | + | |
| 636 | + /** | |
| 637 | + * Verifies a matching certificate. | |
| 638 | + * | |
| 639 | + * This method executes the validation steps in the PKIX path | |
| 640 | + * validation algorithm <draft-ietf-pkix-new-part1-08.txt> which were | |
| 641 | + * not satisfied by the selection criteria used by getCertificates() | |
| 642 | + * to find the certs and only the steps that can be executed in a | |
| 643 | + * forward direction (target to trust anchor). Those steps that can | |
| 644 | + * only be executed in a reverse direction are deferred until the | |
| 645 | + * complete path has been built. | |
| 646 | + * | |
| 647 | + * Trust anchor certs are not validated, but are used to verify the | |
| 648 | + * signature and revocation status of the previous cert. | |
| 649 | + * | |
| 650 | + * If the last certificate is being verified (the one whose subject | |
| 651 | + * matches the target subject, then steps in 6.1.4 of the PKIX | |
| 652 | + * Certification Path Validation algorithm are NOT executed, | |
| 653 | + * regardless of whether or not the last cert is an end-entity | |
| 654 | + * cert or not. This allows callers to certify CA certs as | |
| 655 | + * well as EE certs. | |
| 656 | + * | |
| 657 | + * @param cert the certificate to be verified | |
| 658 | + * @param currentState the current state against which the cert is verified | |
| 659 | + * @param certPathList the certPathList generated thus far | |
| 660 | + */ | |
| 661 | + void verifyCert(X509Certificate cert, State currentState, | |
| 662 | + List<X509Certificate> certPathList) throws GeneralSecurityException | |
| 663 | + { | |
| 664 | + if (debug != null) { | |
| 665 | + debug.println("ForwardBuilder.verifyCert(SN: " | |
| 666 | + + Debug.toHexString(cert.getSerialNumber()) | |
| 667 | + + "\n Issuer: " + cert.getIssuerX500Principal() + ")" | |
| 668 | + + "\n Subject: " + cert.getSubjectX500Principal() + ")"); | |
| 669 | + } | |
| 670 | + | |
| 671 | + ForwardState currState = (ForwardState) currentState; | |
| 672 | + | |
| 673 | + /* | |
| 674 | + * check for looping - abort a loop if | |
| 675 | + * ((we encounter the same certificate twice) AND | |
| 676 | + * ((policyMappingInhibited = true) OR (no policy mapping | |
| 677 | + * extensions can be found between the occurences of the same | |
| 678 | + * certificate))) | |
| 679 | + */ | |
| 680 | + if (certPathList != null) { | |
| 681 | + boolean policyMappingFound = false; | |
| 682 | + for (X509Certificate cpListCert : certPathList) { | |
| 683 | + X509CertImpl cpListCertImpl = X509CertImpl.toImpl(cpListCert); | |
| 684 | + PolicyMappingsExtension policyMappingsExt | |
| 685 | + = cpListCertImpl.getPolicyMappingsExtension(); | |
| 686 | + if (policyMappingsExt != null) { | |
| 687 | + policyMappingFound = true; | |
| 688 | + } | |
| 689 | + if (debug != null) { | |
| 690 | + debug.println("policyMappingFound = " + policyMappingFound); | |
| 691 | + } | |
| 692 | + if (cert.equals(cpListCert)) { | |
| 693 | + if ((buildParams.isPolicyMappingInhibited()) || | |
| 694 | + (!policyMappingFound)) { | |
| 695 | + if (debug != null) { | |
| 696 | + debug.println("loop detected!!"); | |
| 697 | + } | |
| 698 | + throw new CertPathValidatorException("loop detected"); | |
| 699 | + } | |
| 700 | + } | |
| 701 | + } | |
| 702 | + } | |
| 703 | + | |
| 704 | + /* check if trusted cert */ | |
| 705 | + boolean isTrustedCert = trustedCerts.contains(cert); | |
| 706 | + | |
| 707 | + /* we don't perform any validation of the trusted cert */ | |
| 708 | + if (!isTrustedCert) { | |
| 709 | + /* | |
| 710 | + * Check CRITICAL private extensions for user checkers that | |
| 711 | + * support forward checking (forwardCheckers) and remove | |
| 712 | + * ones we know how to check. | |
| 713 | + */ | |
| 714 | + Set<String> unresCritExts = cert.getCriticalExtensionOIDs(); | |
| 715 | + if (unresCritExts == null) { | |
| 716 | + unresCritExts = Collections.<String>emptySet(); | |
| 717 | + } | |
| 718 | + for (PKIXCertPathChecker checker : currState.forwardCheckers) { | |
| 719 | + checker.check(cert, unresCritExts); | |
| 720 | + } | |
| 721 | + | |
| 722 | + /* | |
| 723 | + * Remove extensions from user checkers that don't support | |
| 724 | + * forward checking. After this step, we will have removed | |
| 725 | + * all extensions that all user checkers are capable of | |
| 726 | + * processing. | |
| 727 | + */ | |
| 728 | + for (PKIXCertPathChecker checker : buildParams.getCertPathCheckers()) { | |
| 729 | + if (!checker.isForwardCheckingSupported()) { | |
| 730 | + Set<String> supportedExts = checker.getSupportedExtensions(); | |
| 731 | + if (supportedExts != null) { | |
| 732 | + unresCritExts.removeAll(supportedExts); | |
| 733 | + } | |
| 734 | + } | |
| 735 | + } | |
| 736 | + | |
| 737 | + /* | |
| 738 | + * Look at the remaining extensions and remove any ones we know how | |
| 739 | + * to check. If there are any left, throw an exception! | |
| 740 | + */ | |
| 741 | + if (!unresCritExts.isEmpty()) { | |
| 742 | + unresCritExts.remove( | |
| 743 | + PKIXExtensions.BasicConstraints_Id.toString()); | |
| 744 | + unresCritExts.remove( | |
| 745 | + PKIXExtensions.NameConstraints_Id.toString()); | |
| 746 | + unresCritExts.remove( | |
| 747 | + PKIXExtensions.CertificatePolicies_Id.toString()); | |
| 748 | + unresCritExts.remove( | |
| 749 | + PKIXExtensions.PolicyMappings_Id.toString()); | |
| 750 | + unresCritExts.remove( | |
| 751 | + PKIXExtensions.PolicyConstraints_Id.toString()); | |
| 752 | + unresCritExts.remove( | |
| 753 | + PKIXExtensions.InhibitAnyPolicy_Id.toString()); | |
| 754 | + unresCritExts.remove( | |
| 755 | + PKIXExtensions.SubjectAlternativeName_Id.toString()); | |
| 756 | + unresCritExts.remove(PKIXExtensions.KeyUsage_Id.toString()); | |
| 757 | + unresCritExts.remove( | |
| 758 | + PKIXExtensions.ExtendedKeyUsage_Id.toString()); | |
| 759 | + | |
| 760 | + if (!unresCritExts.isEmpty()) | |
| 761 | + throw new CertPathValidatorException | |
| 762 | + ("Unrecognized critical extension(s)", null, null, -1, | |
| 763 | + PKIXReason.UNRECOGNIZED_CRIT_EXT); | |
| 764 | + } | |
| 765 | + } | |
| 766 | + | |
| 767 | + /* | |
| 768 | + * if this is the target certificate (init=true), then we are | |
| 769 | + * not able to do any more verification, so just return | |
| 770 | + */ | |
| 771 | + if (currState.isInitial()) { | |
| 772 | + return; | |
| 773 | + } | |
| 774 | + | |
| 775 | + /* we don't perform any validation of the trusted cert */ | |
| 776 | + if (!isTrustedCert) { | |
| 777 | + /* Make sure this is a CA cert */ | |
| 778 | + if (cert.getBasicConstraints() == -1) { | |
| 779 | + throw new CertificateException("cert is NOT a CA cert"); | |
| 780 | + } | |
| 781 | + | |
| 782 | + /* | |
| 783 | + * Check keyUsage extension | |
| 784 | + */ | |
| 785 | + KeyChecker.verifyCAKeyUsage(cert); | |
| 786 | + } | |
| 787 | + | |
| 788 | + /* | |
| 789 | + * the following checks are performed even when the cert | |
| 790 | + * is a trusted cert, since we are only extracting the | |
| 791 | + * subjectDN, and publicKey from the cert | |
| 792 | + * in order to verify a previous cert | |
| 793 | + */ | |
| 794 | + | |
| 795 | + /* | |
| 796 | + * Check revocation for the previous cert | |
| 797 | + */ | |
| 798 | + if (buildParams.isRevocationEnabled()) { | |
| 799 | + | |
| 800 | + // first off, see if this cert can authorize revocation... | |
| 801 | + if (CrlRevocationChecker.certCanSignCrl(cert)) { | |
| 802 | + // And then check to be sure no key requiring key parameters | |
| 803 | + // has been encountered | |
| 804 | + if (!currState.keyParamsNeeded()) | |
| 805 | + // If all that checks out, we can check the | |
| 806 | + // revocation status of the cert. Otherwise, | |
| 807 | + // we'll just wait until the end. | |
| 808 | + currState.crlChecker.check(currState.cert, | |
| 809 | + cert.getPublicKey(), | |
| 810 | + true); | |
| 811 | + } | |
| 812 | + } | |
| 813 | + | |
| 814 | + /* | |
| 815 | + * Check signature only if no key requiring key parameters has been | |
| 816 | + * encountered. | |
| 817 | + */ | |
| 818 | + if (!currState.keyParamsNeeded()) { | |
| 819 | + (currState.cert).verify(cert.getPublicKey(), | |
| 820 | + buildParams.getSigProvider()); | |
| 821 | + } | |
| 822 | + } | |
| 823 | + | |
| 824 | + /** | |
| 825 | + * Verifies whether the input certificate completes the path. | |
| 826 | + * Checks the cert against each trust anchor that was specified, in order, | |
| 827 | + * and returns true as soon as it finds a valid anchor. | |
| 828 | + * Returns true if the cert matches a trust anchor specified as a | |
| 829 | + * certificate or if the cert verifies with a trust anchor that | |
| 830 | + * was specified as a trusted {pubkey, caname} pair. Returns false if none | |
| 831 | + * of the trust anchors are valid for this cert. | |
| 832 | + * | |
| 833 | + * @param cert the certificate to test | |
| 834 | + * @return a boolean value indicating whether the cert completes the path. | |
| 835 | + */ | |
| 836 | + boolean isPathCompleted(X509Certificate cert) { | |
| 837 | + for (TrustAnchor anchor : trustAnchors) { | |
| 838 | + if (anchor.getTrustedCert() != null) { | |
| 839 | + if (cert.equals(anchor.getTrustedCert())) { | |
| 840 | + this.trustAnchor = anchor; | |
| 841 | + return true; | |
| 842 | + } else { | |
| 843 | + continue; | |
| 844 | + } | |
| 845 | + } else { | |
| 846 | + X500Principal principal = anchor.getCA(); | |
| 847 | + java.security.PublicKey publicKey = anchor.getCAPublicKey(); | |
| 848 | + | |
| 849 | + if (principal != null && publicKey != null && | |
| 850 | + principal.equals(cert.getSubjectX500Principal())) { | |
| 851 | + if (publicKey.equals(cert.getPublicKey())) { | |
| 852 | + // the cert itself is a trust anchor | |
| 853 | + this.trustAnchor = anchor; | |
| 854 | + return true; | |
| 855 | + } | |
| 856 | + // else, it is a self-issued certificate of the anchor | |
| 857 | + } | |
| 858 | + | |
| 859 | + // Check subject/issuer name chaining | |
| 860 | + if (principal == null || | |
| 861 | + !principal.equals(cert.getIssuerX500Principal())) { | |
| 862 | + continue; | |
| 863 | + } | |
| 864 | + } | |
| 865 | + | |
| 866 | + /* Check revocation if it is enabled */ | |
| 867 | + if (buildParams.isRevocationEnabled()) { | |
| 868 | + try { | |
| 869 | + CrlRevocationChecker crlChecker = new CrlRevocationChecker | |
| 870 | + (anchor, buildParams, null, onlyEECert); | |
| 871 | + crlChecker.check(cert, anchor.getCAPublicKey(), true); | |
| 872 | + } catch (CertPathValidatorException cpve) { | |
| 873 | + if (debug != null) { | |
| 874 | + debug.println("ForwardBuilder.isPathCompleted() cpve"); | |
| 875 | + cpve.printStackTrace(); | |
| 876 | + } | |
| 877 | + continue; | |
| 878 | + } | |
| 879 | + } | |
| 880 | + | |
| 881 | + /* | |
| 882 | + * Check signature | |
| 883 | + */ | |
| 884 | + try { | |
| 885 | + // NOTE: the DSA public key in the buildParams may lack | |
| 886 | + // parameters, yet there is no key to inherit the parameters | |
| 887 | + // from. This is probably such a rare case that it is not worth | |
| 888 | + // trying to detect the situation earlier. | |
| 889 | + cert.verify(anchor.getCAPublicKey(), | |
| 890 | + buildParams.getSigProvider()); | |
| 891 | + } catch (InvalidKeyException ike) { | |
| 892 | + if (debug != null) { | |
| 893 | + debug.println("ForwardBuilder.isPathCompleted() invalid " | |
| 894 | + + "DSA key found"); | |
| 895 | + } | |
| 896 | + continue; | |
| 897 | + } catch (Exception e){ | |
| 898 | + if (debug != null) { | |
| 899 | + debug.println("ForwardBuilder.isPathCompleted() " + | |
| 900 | + "unexpected exception"); | |
| 901 | + e.printStackTrace(); | |
| 902 | + } | |
| 903 | + continue; | |
| 904 | + } | |
| 905 | + | |
| 906 | + this.trustAnchor = anchor; | |
| 907 | + return true; | |
| 908 | + } | |
| 909 | + | |
| 910 | + return false; | |
| 911 | + } | |
| 912 | + | |
| 913 | + /** Adds the certificate to the certPathList | |
| 914 | + * | |
| 915 | + * @param cert the certificate to be added | |
| 916 | + * @param certPathList the certification path list | |
| 917 | + */ | |
| 918 | + void addCertToPath(X509Certificate cert, | |
| 919 | + LinkedList<X509Certificate> certPathList) { | |
| 920 | + certPathList.addFirst(cert); | |
| 921 | + } | |
| 922 | + | |
| 923 | + /** Removes final certificate from the certPathList | |
| 924 | + * | |
| 925 | + * @param certPathList the certification path list | |
| 926 | + */ | |
| 927 | + void removeFinalCertFromPath(LinkedList<X509Certificate> certPathList) { | |
| 928 | + certPathList.removeFirst(); | |
| 929 | + } | |
| 930 | +} | |