J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2006 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; |
| 27 | |
| 28 | import java.io.*; |
| 29 | import java.util.Collection; |
| 30 | import java.util.*; |
| 31 | import java.security.cert.*; |
| 32 | import sun.security.x509.X509CertImpl; |
| 33 | import sun.security.x509.X509CRLImpl; |
| 34 | import sun.security.pkcs.PKCS7; |
| 35 | import sun.security.provider.certpath.X509CertPath; |
| 36 | import sun.security.provider.certpath.X509CertificatePair; |
| 37 | import sun.security.util.DerValue; |
| 38 | import sun.security.util.Cache; |
| 39 | import sun.misc.BASE64Decoder; |
| 40 | |
| 41 | /** |
| 42 | * This class defines a certificate factory for X.509 v3 certificates & |
| 43 | * certification paths, and X.509 v2 certificate revocation lists (CRLs). |
| 44 | * |
| 45 | * @author Jan Luehe |
| 46 | * @author Hemma Prafullchandra |
| 47 | * @author Sean Mullan |
| 48 | * |
| 49 | * |
| 50 | * @see java.security.cert.CertificateFactorySpi |
| 51 | * @see java.security.cert.Certificate |
| 52 | * @see java.security.cert.CertPath |
| 53 | * @see java.security.cert.CRL |
| 54 | * @see java.security.cert.X509Certificate |
| 55 | * @see java.security.cert.X509CRL |
| 56 | * @see sun.security.x509.X509CertImpl |
| 57 | * @see sun.security.x509.X509CRLImpl |
| 58 | */ |
| 59 | |
| 60 | public class X509Factory extends CertificateFactorySpi { |
| 61 | |
| 62 | public static final String BEGIN_CERT = "-----BEGIN CERTIFICATE-----"; |
| 63 | public static final String END_CERT = "-----END CERTIFICATE-----"; |
| 64 | |
| 65 | private static final int defaultExpectedLineLength = 80; |
| 66 | |
| 67 | private static final char[] endBoundary = "-----END".toCharArray(); |
| 68 | |
| 69 | private static final int ENC_MAX_LENGTH = 4096 * 1024; // 4 MB MAX |
| 70 | |
| 71 | private static final Cache certCache = Cache.newSoftMemoryCache(750); |
| 72 | private static final Cache crlCache = Cache.newSoftMemoryCache(750); |
| 73 | |
| 74 | /** |
| 75 | * Generates an X.509 certificate object and initializes it with |
| 76 | * the data read from the input stream <code>is</code>. |
| 77 | * |
| 78 | * @param is an input stream with the certificate data. |
| 79 | * |
| 80 | * @return an X.509 certificate object initialized with the data |
| 81 | * from the input stream. |
| 82 | * |
| 83 | * @exception CertificateException on parsing errors. |
| 84 | */ |
| 85 | public Certificate engineGenerateCertificate(InputStream is) |
| 86 | throws CertificateException |
| 87 | { |
| 88 | if (is == null) { |
| 89 | // clear the caches (for debugging) |
| 90 | certCache.clear(); |
| 91 | X509CertificatePair.clearCache(); |
| 92 | throw new CertificateException("Missing input stream"); |
| 93 | } |
| 94 | try { |
| 95 | if (is.markSupported() == false) { |
| 96 | // consume the entire input stream |
| 97 | byte[] totalBytes; |
| 98 | totalBytes = getTotalBytes(new BufferedInputStream(is)); |
| 99 | is = new ByteArrayInputStream(totalBytes); |
| 100 | } |
| 101 | byte[] encoding = readSequence(is); |
| 102 | if (encoding != null) { |
| 103 | X509CertImpl cert = (X509CertImpl)getFromCache(certCache, encoding); |
| 104 | if (cert != null) { |
| 105 | return cert; |
| 106 | } |
| 107 | cert = new X509CertImpl(encoding); |
| 108 | addToCache(certCache, cert.getEncodedInternal(), cert); |
| 109 | return cert; |
| 110 | } else { |
| 111 | X509CertImpl cert; |
| 112 | // determine if binary or Base64 encoding. If Base64 encoding, |
| 113 | // the certificate must be bounded at the beginning by |
| 114 | // "-----BEGIN". |
| 115 | if (isBase64(is)) { |
| 116 | // Base64 |
| 117 | byte[] data = base64_to_binary(is); |
| 118 | cert = new X509CertImpl(data); |
| 119 | } else { |
| 120 | // binary |
| 121 | cert = new X509CertImpl(new DerValue(is)); |
| 122 | } |
| 123 | return intern(cert); |
| 124 | } |
| 125 | } catch (IOException ioe) { |
| 126 | throw (CertificateException)new CertificateException |
| 127 | ("Could not parse certificate: " + ioe.toString()).initCause(ioe); |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Read a DER SEQUENCE from an InputStream and return the encoding. |
| 133 | * If data does not represent a SEQUENCE, it uses indefinite length |
| 134 | * encoding, or is longer than ENC_MAX_LENGTH, the stream is reset |
| 135 | * and this method returns null. |
| 136 | */ |
| 137 | private static byte[] readSequence(InputStream in) throws IOException { |
| 138 | in.mark(ENC_MAX_LENGTH); |
| 139 | byte[] b = new byte[4]; |
| 140 | int i = readFully(in, b, 0, b.length); |
| 141 | if ((i != b.length) || (b[0] != 0x30)) { // first byte must be SEQUENCE |
| 142 | in.reset(); |
| 143 | return null; |
| 144 | } |
| 145 | i = b[1] & 0xff; |
| 146 | int totalLength; |
| 147 | if (i < 0x80) { |
| 148 | int valueLength = i; |
| 149 | totalLength = valueLength + 2; |
| 150 | } else if (i == 0x81) { |
| 151 | int valueLength = b[2] & 0xff; |
| 152 | totalLength = valueLength + 3; |
| 153 | } else if (i == 0x82) { |
| 154 | int valueLength = ((b[2] & 0xff) << 8) | (b[3] & 0xff); |
| 155 | totalLength = valueLength + 4; |
| 156 | } else { // ignore longer length forms |
| 157 | in.reset(); |
| 158 | return null; |
| 159 | } |
| 160 | if (totalLength > ENC_MAX_LENGTH) { |
| 161 | in.reset(); |
| 162 | return null; |
| 163 | } |
| 164 | byte[] encoding = new byte[totalLength]; |
| 165 | if( totalLength < b.length ) { |
| 166 | in.reset(); |
| 167 | i = readFully(in, encoding, 0, totalLength); |
| 168 | if( i != totalLength ) { |
| 169 | in.reset(); |
| 170 | return null; |
| 171 | } |
| 172 | } else { |
| 173 | System.arraycopy(b, 0, encoding, 0, b.length); |
| 174 | int n = totalLength - b.length; |
| 175 | i = readFully(in, encoding, b.length, n); |
| 176 | if (i != n) { |
| 177 | in.reset(); |
| 178 | return null; |
| 179 | } |
| 180 | } |
| 181 | return encoding; |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Read from the stream until length bytes have been read or EOF has |
| 186 | * been reached. Return the number of bytes actually read. |
| 187 | */ |
| 188 | private static int readFully(InputStream in, byte[] buffer, int offset, |
| 189 | int length) throws IOException { |
| 190 | int read = 0; |
| 191 | while (length > 0) { |
| 192 | int n = in.read(buffer, offset, length); |
| 193 | if (n <= 0) { |
| 194 | break; |
| 195 | } |
| 196 | read += n; |
| 197 | length -= n; |
| 198 | offset += n; |
| 199 | } |
| 200 | return read; |
| 201 | } |
| 202 | |
| 203 | /** |
| 204 | * Return an interned X509CertImpl for the given certificate. |
| 205 | * If the given X509Certificate or X509CertImpl is already present |
| 206 | * in the cert cache, the cached object is returned. Otherwise, |
| 207 | * if it is a X509Certificate, it is first converted to a X509CertImpl. |
| 208 | * Then the X509CertImpl is added to the cache and returned. |
| 209 | * |
| 210 | * Note that all certificates created via generateCertificate(InputStream) |
| 211 | * are already interned and this method does not need to be called. |
| 212 | * It is useful for certificates that cannot be created via |
| 213 | * generateCertificate() and for converting other X509Certificate |
| 214 | * implementations to an X509CertImpl. |
| 215 | */ |
| 216 | public static synchronized X509CertImpl intern(X509Certificate c) |
| 217 | throws CertificateException { |
| 218 | if (c == null) { |
| 219 | return null; |
| 220 | } |
| 221 | boolean isImpl = c instanceof X509CertImpl; |
| 222 | byte[] encoding; |
| 223 | if (isImpl) { |
| 224 | encoding = ((X509CertImpl)c).getEncodedInternal(); |
| 225 | } else { |
| 226 | encoding = c.getEncoded(); |
| 227 | } |
| 228 | X509CertImpl newC = (X509CertImpl)getFromCache(certCache, encoding); |
| 229 | if (newC != null) { |
| 230 | return newC; |
| 231 | } |
| 232 | if (isImpl) { |
| 233 | newC = (X509CertImpl)c; |
| 234 | } else { |
| 235 | newC = new X509CertImpl(encoding); |
| 236 | encoding = newC.getEncodedInternal(); |
| 237 | } |
| 238 | addToCache(certCache, encoding, newC); |
| 239 | return newC; |
| 240 | } |
| 241 | |
| 242 | /** |
| 243 | * Return an interned X509CRLImpl for the given certificate. |
| 244 | * For more information, see intern(X509Certificate). |
| 245 | */ |
| 246 | public static synchronized X509CRLImpl intern(X509CRL c) |
| 247 | throws CRLException { |
| 248 | if (c == null) { |
| 249 | return null; |
| 250 | } |
| 251 | boolean isImpl = c instanceof X509CRLImpl; |
| 252 | byte[] encoding; |
| 253 | if (isImpl) { |
| 254 | encoding = ((X509CRLImpl)c).getEncodedInternal(); |
| 255 | } else { |
| 256 | encoding = c.getEncoded(); |
| 257 | } |
| 258 | X509CRLImpl newC = (X509CRLImpl)getFromCache(crlCache, encoding); |
| 259 | if (newC != null) { |
| 260 | return newC; |
| 261 | } |
| 262 | if (isImpl) { |
| 263 | newC = (X509CRLImpl)c; |
| 264 | } else { |
| 265 | newC = new X509CRLImpl(encoding); |
| 266 | encoding = newC.getEncodedInternal(); |
| 267 | } |
| 268 | addToCache(crlCache, encoding, newC); |
| 269 | return newC; |
| 270 | } |
| 271 | |
| 272 | /** |
| 273 | * Get the X509CertImpl or X509CRLImpl from the cache. |
| 274 | */ |
| 275 | private static synchronized Object getFromCache(Cache cache, |
| 276 | byte[] encoding) { |
| 277 | Object key = new Cache.EqualByteArray(encoding); |
| 278 | Object value = cache.get(key); |
| 279 | return value; |
| 280 | } |
| 281 | |
| 282 | /** |
| 283 | * Add the X509CertImpl or X509CRLImpl to the cache. |
| 284 | */ |
| 285 | private static synchronized void addToCache(Cache cache, byte[] encoding, |
| 286 | Object value) { |
| 287 | if (encoding.length > ENC_MAX_LENGTH) { |
| 288 | return; |
| 289 | } |
| 290 | Object key = new Cache.EqualByteArray(encoding); |
| 291 | cache.put(key, value); |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * Generates a <code>CertPath</code> object and initializes it with |
| 296 | * the data read from the <code>InputStream</code> inStream. The data |
| 297 | * is assumed to be in the default encoding. |
| 298 | * |
| 299 | * @param inStream an <code>InputStream</code> containing the data |
| 300 | * @return a <code>CertPath</code> initialized with the data from the |
| 301 | * <code>InputStream</code> |
| 302 | * @exception CertificateException if an exception occurs while decoding |
| 303 | * @since 1.4 |
| 304 | */ |
| 305 | public CertPath engineGenerateCertPath(InputStream inStream) |
| 306 | throws CertificateException |
| 307 | { |
| 308 | if (inStream == null) { |
| 309 | throw new CertificateException("Missing input stream"); |
| 310 | } |
| 311 | try { |
| 312 | if (inStream.markSupported() == false) { |
| 313 | // consume the entire input stream |
| 314 | byte[] totalBytes; |
| 315 | totalBytes = getTotalBytes(new BufferedInputStream(inStream)); |
| 316 | inStream = new ByteArrayInputStream(totalBytes); |
| 317 | } |
| 318 | // determine if binary or Base64 encoding. If Base64 encoding, |
| 319 | // each certificate must be bounded at the beginning by |
| 320 | // "-----BEGIN". |
| 321 | if (isBase64(inStream)) { |
| 322 | // Base64 |
| 323 | byte[] data = base64_to_binary(inStream); |
| 324 | return new X509CertPath(new ByteArrayInputStream(data)); |
| 325 | } else { |
| 326 | return new X509CertPath(inStream); |
| 327 | } |
| 328 | } catch (IOException ioe) { |
| 329 | throw new CertificateException(ioe.getMessage()); |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | /** |
| 334 | * Generates a <code>CertPath</code> object and initializes it with |
| 335 | * the data read from the <code>InputStream</code> inStream. The data |
| 336 | * is assumed to be in the specified encoding. |
| 337 | * |
| 338 | * @param inStream an <code>InputStream</code> containing the data |
| 339 | * @param encoding the encoding used for the data |
| 340 | * @return a <code>CertPath</code> initialized with the data from the |
| 341 | * <code>InputStream</code> |
| 342 | * @exception CertificateException if an exception occurs while decoding or |
| 343 | * the encoding requested is not supported |
| 344 | * @since 1.4 |
| 345 | */ |
| 346 | public CertPath engineGenerateCertPath(InputStream inStream, |
| 347 | String encoding) throws CertificateException |
| 348 | { |
| 349 | if (inStream == null) { |
| 350 | throw new CertificateException("Missing input stream"); |
| 351 | } |
| 352 | try { |
| 353 | if (inStream.markSupported() == false) { |
| 354 | // consume the entire input stream |
| 355 | byte[] totalBytes; |
| 356 | totalBytes = getTotalBytes(new BufferedInputStream(inStream)); |
| 357 | inStream = new ByteArrayInputStream(totalBytes); |
| 358 | } |
| 359 | // determine if binary or Base64 encoding. If Base64 encoding, |
| 360 | // each certificate must be bounded at the beginning by |
| 361 | // "-----BEGIN". |
| 362 | if (isBase64(inStream)) { |
| 363 | // Base64 |
| 364 | byte[] data = base64_to_binary(inStream); |
| 365 | return new X509CertPath(new ByteArrayInputStream(data), encoding); |
| 366 | } else { |
| 367 | return(new X509CertPath(inStream, encoding)); |
| 368 | } |
| 369 | } catch (IOException ioe) { |
| 370 | throw new CertificateException(ioe.getMessage()); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | /** |
| 375 | * Generates a <code>CertPath</code> object and initializes it with |
| 376 | * a <code>List</code> of <code>Certificate</code>s. |
| 377 | * <p> |
| 378 | * The certificates supplied must be of a type supported by the |
| 379 | * <code>CertificateFactory</code>. They will be copied out of the supplied |
| 380 | * <code>List</code> object. |
| 381 | * |
| 382 | * @param certificates a <code>List</code> of <code>Certificate</code>s |
| 383 | * @return a <code>CertPath</code> initialized with the supplied list of |
| 384 | * certificates |
| 385 | * @exception CertificateException if an exception occurs |
| 386 | * @since 1.4 |
| 387 | */ |
| 388 | public CertPath |
| 389 | engineGenerateCertPath(List<? extends Certificate> certificates) |
| 390 | throws CertificateException |
| 391 | { |
| 392 | return(new X509CertPath(certificates)); |
| 393 | } |
| 394 | |
| 395 | /** |
| 396 | * Returns an iteration of the <code>CertPath</code> encodings supported |
| 397 | * by this certificate factory, with the default encoding first. |
| 398 | * <p> |
| 399 | * Attempts to modify the returned <code>Iterator</code> via its |
| 400 | * <code>remove</code> method result in an |
| 401 | * <code>UnsupportedOperationException</code>. |
| 402 | * |
| 403 | * @return an <code>Iterator</code> over the names of the supported |
| 404 | * <code>CertPath</code> encodings (as <code>String</code>s) |
| 405 | * @since 1.4 |
| 406 | */ |
| 407 | public Iterator<String> engineGetCertPathEncodings() { |
| 408 | return(X509CertPath.getEncodingsStatic()); |
| 409 | } |
| 410 | |
| 411 | /** |
| 412 | * Returns a (possibly empty) collection view of X.509 certificates read |
| 413 | * from the given input stream <code>is</code>. |
| 414 | * |
| 415 | * @param is the input stream with the certificates. |
| 416 | * |
| 417 | * @return a (possibly empty) collection view of X.509 certificate objects |
| 418 | * initialized with the data from the input stream. |
| 419 | * |
| 420 | * @exception CertificateException on parsing errors. |
| 421 | */ |
| 422 | public Collection<? extends java.security.cert.Certificate> |
| 423 | engineGenerateCertificates(InputStream is) |
| 424 | throws CertificateException { |
| 425 | if (is == null) { |
| 426 | throw new CertificateException("Missing input stream"); |
| 427 | } |
| 428 | try { |
| 429 | if (is.markSupported() == false) { |
| 430 | // consume the entire input stream |
| 431 | is = new ByteArrayInputStream |
| 432 | (getTotalBytes(new BufferedInputStream(is))); |
| 433 | } |
| 434 | return parseX509orPKCS7Cert(is); |
| 435 | } catch (IOException ioe) { |
| 436 | throw new CertificateException(ioe); |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | /** |
| 441 | * Generates an X.509 certificate revocation list (CRL) object and |
| 442 | * initializes it with the data read from the given input stream |
| 443 | * <code>is</code>. |
| 444 | * |
| 445 | * @param is an input stream with the CRL data. |
| 446 | * |
| 447 | * @return an X.509 CRL object initialized with the data |
| 448 | * from the input stream. |
| 449 | * |
| 450 | * @exception CRLException on parsing errors. |
| 451 | */ |
| 452 | public CRL engineGenerateCRL(InputStream is) |
| 453 | throws CRLException |
| 454 | { |
| 455 | if (is == null) { |
| 456 | // clear the cache (for debugging) |
| 457 | crlCache.clear(); |
| 458 | throw new CRLException("Missing input stream"); |
| 459 | } |
| 460 | try { |
| 461 | if (is.markSupported() == false) { |
| 462 | // consume the entire input stream |
| 463 | byte[] totalBytes; |
| 464 | totalBytes = getTotalBytes(new BufferedInputStream(is)); |
| 465 | is = new ByteArrayInputStream(totalBytes); |
| 466 | } |
| 467 | byte[] encoding = readSequence(is); |
| 468 | if (encoding != null) { |
| 469 | X509CRLImpl crl = (X509CRLImpl)getFromCache(crlCache, encoding); |
| 470 | if (crl != null) { |
| 471 | return crl; |
| 472 | } |
| 473 | crl = new X509CRLImpl(encoding); |
| 474 | addToCache(crlCache, crl.getEncodedInternal(), crl); |
| 475 | return crl; |
| 476 | } else { |
| 477 | X509CRLImpl crl; |
| 478 | // determine if binary or Base64 encoding. If Base64 encoding, |
| 479 | // the CRL must be bounded at the beginning by |
| 480 | // "-----BEGIN". |
| 481 | if (isBase64(is)) { |
| 482 | // Base64 |
| 483 | byte[] data = base64_to_binary(is); |
| 484 | crl = new X509CRLImpl(data); |
| 485 | } else { |
| 486 | // binary |
| 487 | crl = new X509CRLImpl(new DerValue(is)); |
| 488 | } |
| 489 | return intern(crl); |
| 490 | } |
| 491 | } catch (IOException ioe) { |
| 492 | throw new CRLException(ioe.getMessage()); |
| 493 | } |
| 494 | } |
| 495 | |
| 496 | /** |
| 497 | * Returns a (possibly empty) collection view of X.509 CRLs read |
| 498 | * from the given input stream <code>is</code>. |
| 499 | * |
| 500 | * @param is the input stream with the CRLs. |
| 501 | * |
| 502 | * @return a (possibly empty) collection view of X.509 CRL objects |
| 503 | * initialized with the data from the input stream. |
| 504 | * |
| 505 | * @exception CRLException on parsing errors. |
| 506 | */ |
| 507 | public Collection<? extends java.security.cert.CRL> engineGenerateCRLs(InputStream |
| 508 | is) |
| 509 | throws CRLException |
| 510 | { |
| 511 | if (is == null) { |
| 512 | throw new CRLException("Missing input stream"); |
| 513 | } |
| 514 | try { |
| 515 | if (is.markSupported() == false) { |
| 516 | // consume the entire input stream |
| 517 | is = new ByteArrayInputStream |
| 518 | (getTotalBytes(new BufferedInputStream(is))); |
| 519 | } |
| 520 | return parseX509orPKCS7CRL(is); |
| 521 | } catch (IOException ioe) { |
| 522 | throw new CRLException(ioe.getMessage()); |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | /* |
| 527 | * Parses the data in the given input stream as a sequence of DER |
| 528 | * encoded X.509 certificates (in binary or base 64 encoded format) OR |
| 529 | * as a single PKCS#7 encoded blob (in binary or base64 encoded format). |
| 530 | */ |
| 531 | private Collection<? extends java.security.cert.Certificate> |
| 532 | parseX509orPKCS7Cert(InputStream is) |
| 533 | throws CertificateException, IOException |
| 534 | { |
| 535 | Collection<X509CertImpl> coll = new ArrayList<X509CertImpl>(); |
| 536 | boolean first = true; |
| 537 | while (is.available() != 0) { |
| 538 | // determine if binary or Base64 encoding. If Base64 encoding, |
| 539 | // each certificate must be bounded at the beginning by |
| 540 | // "-----BEGIN". |
| 541 | InputStream is2 = is; |
| 542 | if (isBase64(is2)) { |
| 543 | // Base64 |
| 544 | is2 = new ByteArrayInputStream(base64_to_binary(is2)); |
| 545 | } |
| 546 | if (first) |
| 547 | is2.mark(is2.available()); |
| 548 | try { |
| 549 | // treat as X.509 cert |
| 550 | coll.add(intern(new X509CertImpl(new DerValue(is2)))); |
| 551 | } catch (CertificateException e) { |
| 552 | Throwable cause = e.getCause(); |
| 553 | // only treat as PKCS#7 if this is the first cert parsed |
| 554 | // and the root cause of the decoding failure is an IOException |
| 555 | if (first && cause != null && (cause instanceof IOException)) { |
| 556 | // treat as PKCS#7 |
| 557 | is2.reset(); |
| 558 | PKCS7 pkcs7 = new PKCS7(is2); |
| 559 | X509Certificate[] certs = pkcs7.getCertificates(); |
| 560 | // certs are optional in PKCS #7 |
| 561 | if (certs != null) { |
| 562 | return Arrays.asList(certs); |
| 563 | } else { |
| 564 | // no certs provided |
| 565 | return new ArrayList<X509Certificate>(0); |
| 566 | } |
| 567 | } else { |
| 568 | throw e; |
| 569 | } |
| 570 | } |
| 571 | first = false; |
| 572 | } |
| 573 | return coll; |
| 574 | } |
| 575 | |
| 576 | /* |
| 577 | * Parses the data in the given input stream as a sequence of DER encoded |
| 578 | * X.509 CRLs (in binary or base 64 encoded format) OR as a single PKCS#7 |
| 579 | * encoded blob (in binary or base 64 encoded format). |
| 580 | */ |
| 581 | private Collection<? extends java.security.cert.CRL> |
| 582 | parseX509orPKCS7CRL(InputStream is) |
| 583 | throws CRLException, IOException |
| 584 | { |
| 585 | Collection<X509CRLImpl> coll = new ArrayList<X509CRLImpl>(); |
| 586 | boolean first = true; |
| 587 | while (is.available() != 0) { |
| 588 | // determine if binary or Base64 encoding. If Base64 encoding, |
| 589 | // the CRL must be bounded at the beginning by |
| 590 | // "-----BEGIN". |
| 591 | InputStream is2 = is; |
| 592 | if (isBase64(is)) { |
| 593 | // Base64 |
| 594 | is2 = new ByteArrayInputStream(base64_to_binary(is2)); |
| 595 | } |
| 596 | if (first) |
| 597 | is2.mark(is2.available()); |
| 598 | try { |
| 599 | // treat as X.509 CRL |
| 600 | coll.add(new X509CRLImpl(is2)); |
| 601 | } catch (CRLException e) { |
| 602 | // only treat as PKCS#7 if this is the first CRL parsed |
| 603 | if (first) { |
| 604 | is2.reset(); |
| 605 | PKCS7 pkcs7 = new PKCS7(is2); |
| 606 | X509CRL[] crls = pkcs7.getCRLs(); |
| 607 | // CRLs are optional in PKCS #7 |
| 608 | if (crls != null) { |
| 609 | return Arrays.asList(crls); |
| 610 | } else { |
| 611 | // no crls provided |
| 612 | return new ArrayList<X509CRL>(0); |
| 613 | } |
| 614 | } |
| 615 | } |
| 616 | first = false; |
| 617 | } |
| 618 | return coll; |
| 619 | } |
| 620 | |
| 621 | /* |
| 622 | * Converts a Base64-encoded X.509 certificate or X.509 CRL or PKCS#7 data |
| 623 | * to binary encoding. |
| 624 | * In all cases, the data must be bounded at the beginning by |
| 625 | * "-----BEGIN", and must be bounded at the end by "-----END". |
| 626 | */ |
| 627 | private byte[] base64_to_binary(InputStream is) |
| 628 | throws IOException |
| 629 | { |
| 630 | long len = 0; // total length of base64 encoding, including boundaries |
| 631 | |
| 632 | is.mark(is.available()); |
| 633 | |
| 634 | BufferedInputStream bufin = new BufferedInputStream(is); |
| 635 | BufferedReader br = |
| 636 | new BufferedReader(new InputStreamReader(bufin, "ASCII")); |
| 637 | |
| 638 | // First read all of the data that is found between |
| 639 | // the "-----BEGIN" and "-----END" boundaries into a buffer. |
| 640 | String temp; |
| 641 | if ((temp=readLine(br))==null || !temp.startsWith("-----BEGIN")) { |
| 642 | throw new IOException("Unsupported encoding"); |
| 643 | } else { |
| 644 | len += temp.length(); |
| 645 | } |
| 646 | StringBuffer strBuf = new StringBuffer(); |
| 647 | while ((temp=readLine(br))!=null && !temp.startsWith("-----END")) { |
| 648 | strBuf.append(temp); |
| 649 | } |
| 650 | if (temp == null) { |
| 651 | throw new IOException("Unsupported encoding"); |
| 652 | } else { |
| 653 | len += temp.length(); |
| 654 | } |
| 655 | |
| 656 | // consume only as much as was needed |
| 657 | len += strBuf.length(); |
| 658 | is.reset(); |
| 659 | is.skip(len); |
| 660 | |
| 661 | // Now, that data is supposed to be a single X.509 certificate or |
| 662 | // X.509 CRL or PKCS#7 formatted data... Base64 encoded. |
| 663 | // Decode into binary and return the result. |
| 664 | BASE64Decoder decoder = new BASE64Decoder(); |
| 665 | return decoder.decodeBuffer(strBuf.toString()); |
| 666 | } |
| 667 | |
| 668 | /* |
| 669 | * Reads the entire input stream into a byte array. |
| 670 | */ |
| 671 | private byte[] getTotalBytes(InputStream is) throws IOException { |
| 672 | byte[] buffer = new byte[8192]; |
| 673 | ByteArrayOutputStream baos = new ByteArrayOutputStream(2048); |
| 674 | int n; |
| 675 | baos.reset(); |
| 676 | while ((n = is.read(buffer, 0, buffer.length)) != -1) { |
| 677 | baos.write(buffer, 0, n); |
| 678 | } |
| 679 | return baos.toByteArray(); |
| 680 | } |
| 681 | |
| 682 | /* |
| 683 | * Determines if input is binary or Base64 encoded. |
| 684 | */ |
| 685 | private boolean isBase64(InputStream is) throws IOException { |
| 686 | if (is.available() >= 10) { |
| 687 | is.mark(10); |
| 688 | int c1 = is.read(); |
| 689 | int c2 = is.read(); |
| 690 | int c3 = is.read(); |
| 691 | int c4 = is.read(); |
| 692 | int c5 = is.read(); |
| 693 | int c6 = is.read(); |
| 694 | int c7 = is.read(); |
| 695 | int c8 = is.read(); |
| 696 | int c9 = is.read(); |
| 697 | int c10 = is.read(); |
| 698 | is.reset(); |
| 699 | if (c1 == '-' && c2 == '-' && c3 == '-' && c4 == '-' |
| 700 | && c5 == '-' && c6 == 'B' && c7 == 'E' && c8 == 'G' |
| 701 | && c9 == 'I' && c10 == 'N') { |
| 702 | return true; |
| 703 | } else { |
| 704 | return false; |
| 705 | } |
| 706 | } else { |
| 707 | return false; |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | /* |
| 712 | * Read a line of text. A line is considered to be terminated by any one |
| 713 | * of a line feed ('\n'), a carriage return ('\r'), a carriage return |
| 714 | * followed immediately by a linefeed, or an end-of-certificate marker. |
| 715 | * |
| 716 | * @return A String containing the contents of the line, including |
| 717 | * any line-termination characters, or null if the end of the |
| 718 | * stream has been reached. |
| 719 | */ |
| 720 | private String readLine(BufferedReader br) throws IOException { |
| 721 | int c; |
| 722 | int i = 0; |
| 723 | boolean isMatch = true; |
| 724 | boolean matched = false; |
| 725 | StringBuffer sb = new StringBuffer(defaultExpectedLineLength); |
| 726 | do { |
| 727 | c = br.read(); |
| 728 | if (isMatch && (i < endBoundary.length)) { |
| 729 | isMatch = ((char)c != endBoundary[i++]) ? false : true; |
| 730 | } |
| 731 | if (!matched) |
| 732 | matched = (isMatch && (i == endBoundary.length)); |
| 733 | sb.append((char)c); |
| 734 | } while ((c != -1) && (c != '\n') && (c != '\r')); |
| 735 | |
| 736 | if (!matched && c == -1) { |
| 737 | return null; |
| 738 | } |
| 739 | if (c == '\r') { |
| 740 | br.mark(1); |
| 741 | int c2 = br.read(); |
| 742 | if (c2 == '\n') { |
| 743 | sb.append((char)c); |
| 744 | } else { |
| 745 | br.reset(); |
| 746 | } |
| 747 | } |
| 748 | return sb.toString(); |
| 749 | } |
| 750 | } |