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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 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; | |
| 27 | + | |
| 28 | +import java.io.*; | |
| 29 | +import java.util.*; | |
| 30 | +import java.security.cert.*; | |
| 31 | +import sun.security.x509.X509CertImpl; | |
| 32 | +import sun.security.x509.X509CRLImpl; | |
| 33 | +import sun.security.pkcs.PKCS7; | |
| 34 | +import sun.security.provider.certpath.X509CertPath; | |
| 35 | +import sun.security.provider.certpath.X509CertificatePair; | |
| 36 | +import sun.security.util.DerValue; | |
| 37 | +import sun.security.util.Cache; | |
| 38 | +import sun.misc.BASE64Decoder; | |
| 39 | +import sun.security.pkcs.ParsingException; | |
| 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 ENC_MAX_LENGTH = 4096 * 1024; // 4 MB MAX | |
| 66 | + | |
| 67 | + private static final Cache certCache = Cache.newSoftMemoryCache(750); | |
| 68 | + private static final Cache crlCache = Cache.newSoftMemoryCache(750); | |
| 69 | + | |
| 70 | + /** | |
| 71 | + * Generates an X.509 certificate object and initializes it with | |
| 72 | + * the data read from the input stream <code>is</code>. | |
| 73 | + * | |
| 74 | + * @param is an input stream with the certificate data. | |
| 75 | + * | |
| 76 | + * @return an X.509 certificate object initialized with the data | |
| 77 | + * from the input stream. | |
| 78 | + * | |
| 79 | + * @exception CertificateException on parsing errors. | |
| 80 | + */ | |
| 81 | + public Certificate engineGenerateCertificate(InputStream is) | |
| 82 | + throws CertificateException | |
| 83 | + { | |
| 84 | + if (is == null) { | |
| 85 | + // clear the caches (for debugging) | |
| 86 | + certCache.clear(); | |
| 87 | + X509CertificatePair.clearCache(); | |
| 88 | + throw new CertificateException("Missing input stream"); | |
| 89 | + } | |
| 90 | + try { | |
| 91 | + byte[] encoding = readOneBlock(is); | |
| 92 | + if (encoding != null) { | |
| 93 | + X509CertImpl cert = (X509CertImpl)getFromCache(certCache, encoding); | |
| 94 | + if (cert != null) { | |
| 95 | + return cert; | |
| 96 | + } | |
| 97 | + cert = new X509CertImpl(encoding); | |
| 98 | + addToCache(certCache, cert.getEncodedInternal(), cert); | |
| 99 | + return cert; | |
| 100 | + } else { | |
| 101 | + throw new IOException("Empty input"); | |
| 102 | + } | |
| 103 | + } catch (IOException ioe) { | |
| 104 | + throw (CertificateException)new CertificateException | |
| 105 | + ("Could not parse certificate: " + ioe.toString()).initCause(ioe); | |
| 106 | + } | |
| 107 | + } | |
| 108 | + | |
| 109 | + /** | |
| 110 | + * Read from the stream until length bytes have been read or EOF has | |
| 111 | + * been reached. Return the number of bytes actually read. | |
| 112 | + */ | |
| 113 | + private static int readFully(InputStream in, ByteArrayOutputStream bout, | |
| 114 | + int length) throws IOException { | |
| 115 | + int read = 0; | |
| 116 | + byte[] buffer = new byte[2048]; | |
| 117 | + while (length > 0) { | |
| 118 | + int n = in.read(buffer, 0, length<2048?length:2048); | |
| 119 | + if (n <= 0) { | |
| 120 | + break; | |
| 121 | + } | |
| 122 | + bout.write(buffer, 0, n); | |
| 123 | + read += n; | |
| 124 | + length -= n; | |
| 125 | + } | |
| 126 | + return read; | |
| 127 | + } | |
| 128 | + | |
| 129 | + /** | |
| 130 | + * Return an interned X509CertImpl for the given certificate. | |
| 131 | + * If the given X509Certificate or X509CertImpl is already present | |
| 132 | + * in the cert cache, the cached object is returned. Otherwise, | |
| 133 | + * if it is a X509Certificate, it is first converted to a X509CertImpl. | |
| 134 | + * Then the X509CertImpl is added to the cache and returned. | |
| 135 | + * | |
| 136 | + * Note that all certificates created via generateCertificate(InputStream) | |
| 137 | + * are already interned and this method does not need to be called. | |
| 138 | + * It is useful for certificates that cannot be created via | |
| 139 | + * generateCertificate() and for converting other X509Certificate | |
| 140 | + * implementations to an X509CertImpl. | |
| 141 | + */ | |
| 142 | + public static synchronized X509CertImpl intern(X509Certificate c) | |
| 143 | + throws CertificateException { | |
| 144 | + if (c == null) { | |
| 145 | + return null; | |
| 146 | + } | |
| 147 | + boolean isImpl = c instanceof X509CertImpl; | |
| 148 | + byte[] encoding; | |
| 149 | + if (isImpl) { | |
| 150 | + encoding = ((X509CertImpl)c).getEncodedInternal(); | |
| 151 | + } else { | |
| 152 | + encoding = c.getEncoded(); | |
| 153 | + } | |
| 154 | + X509CertImpl newC = (X509CertImpl)getFromCache(certCache, encoding); | |
| 155 | + if (newC != null) { | |
| 156 | + return newC; | |
| 157 | + } | |
| 158 | + if (isImpl) { | |
| 159 | + newC = (X509CertImpl)c; | |
| 160 | + } else { | |
| 161 | + newC = new X509CertImpl(encoding); | |
| 162 | + encoding = newC.getEncodedInternal(); | |
| 163 | + } | |
| 164 | + addToCache(certCache, encoding, newC); | |
| 165 | + return newC; | |
| 166 | + } | |
| 167 | + | |
| 168 | + /** | |
| 169 | + * Return an interned X509CRLImpl for the given certificate. | |
| 170 | + * For more information, see intern(X509Certificate). | |
| 171 | + */ | |
| 172 | + public static synchronized X509CRLImpl intern(X509CRL c) | |
| 173 | + throws CRLException { | |
| 174 | + if (c == null) { | |
| 175 | + return null; | |
| 176 | + } | |
| 177 | + boolean isImpl = c instanceof X509CRLImpl; | |
| 178 | + byte[] encoding; | |
| 179 | + if (isImpl) { | |
| 180 | + encoding = ((X509CRLImpl)c).getEncodedInternal(); | |
| 181 | + } else { | |
| 182 | + encoding = c.getEncoded(); | |
| 183 | + } | |
| 184 | + X509CRLImpl newC = (X509CRLImpl)getFromCache(crlCache, encoding); | |
| 185 | + if (newC != null) { | |
| 186 | + return newC; | |
| 187 | + } | |
| 188 | + if (isImpl) { | |
| 189 | + newC = (X509CRLImpl)c; | |
| 190 | + } else { | |
| 191 | + newC = new X509CRLImpl(encoding); | |
| 192 | + encoding = newC.getEncodedInternal(); | |
| 193 | + } | |
| 194 | + addToCache(crlCache, encoding, newC); | |
| 195 | + return newC; | |
| 196 | + } | |
| 197 | + | |
| 198 | + /** | |
| 199 | + * Get the X509CertImpl or X509CRLImpl from the cache. | |
| 200 | + */ | |
| 201 | + private static synchronized Object getFromCache(Cache cache, | |
| 202 | + byte[] encoding) { | |
| 203 | + Object key = new Cache.EqualByteArray(encoding); | |
| 204 | + Object value = cache.get(key); | |
| 205 | + return value; | |
| 206 | + } | |
| 207 | + | |
| 208 | + /** | |
| 209 | + * Add the X509CertImpl or X509CRLImpl to the cache. | |
| 210 | + */ | |
| 211 | + private static synchronized void addToCache(Cache cache, byte[] encoding, | |
| 212 | + Object value) { | |
| 213 | + if (encoding.length > ENC_MAX_LENGTH) { | |
| 214 | + return; | |
| 215 | + } | |
| 216 | + Object key = new Cache.EqualByteArray(encoding); | |
| 217 | + cache.put(key, value); | |
| 218 | + } | |
| 219 | + | |
| 220 | + /** | |
| 221 | + * Generates a <code>CertPath</code> object and initializes it with | |
| 222 | + * the data read from the <code>InputStream</code> inStream. The data | |
| 223 | + * is assumed to be in the default encoding. | |
| 224 | + * | |
| 225 | + * @param inStream an <code>InputStream</code> containing the data | |
| 226 | + * @return a <code>CertPath</code> initialized with the data from the | |
| 227 | + * <code>InputStream</code> | |
| 228 | + * @exception CertificateException if an exception occurs while decoding | |
| 229 | + * @since 1.4 | |
| 230 | + */ | |
| 231 | + public CertPath engineGenerateCertPath(InputStream inStream) | |
| 232 | + throws CertificateException | |
| 233 | + { | |
| 234 | + if (inStream == null) { | |
| 235 | + throw new CertificateException("Missing input stream"); | |
| 236 | + } | |
| 237 | + try { | |
| 238 | + byte[] encoding = readOneBlock(inStream); | |
| 239 | + if (encoding != null) { | |
| 240 | + return new X509CertPath(new ByteArrayInputStream(encoding)); | |
| 241 | + } else { | |
| 242 | + throw new IOException("Empty input"); | |
| 243 | + } | |
| 244 | + } catch (IOException ioe) { | |
| 245 | + throw new CertificateException(ioe.getMessage()); | |
| 246 | + } | |
| 247 | + } | |
| 248 | + | |
| 249 | + /** | |
| 250 | + * Generates a <code>CertPath</code> object and initializes it with | |
| 251 | + * the data read from the <code>InputStream</code> inStream. The data | |
| 252 | + * is assumed to be in the specified encoding. | |
| 253 | + * | |
| 254 | + * @param inStream an <code>InputStream</code> containing the data | |
| 255 | + * @param encoding the encoding used for the data | |
| 256 | + * @return a <code>CertPath</code> initialized with the data from the | |
| 257 | + * <code>InputStream</code> | |
| 258 | + * @exception CertificateException if an exception occurs while decoding or | |
| 259 | + * the encoding requested is not supported | |
| 260 | + * @since 1.4 | |
| 261 | + */ | |
| 262 | + public CertPath engineGenerateCertPath(InputStream inStream, | |
| 263 | + String encoding) throws CertificateException | |
| 264 | + { | |
| 265 | + if (inStream == null) { | |
| 266 | + throw new CertificateException("Missing input stream"); | |
| 267 | + } | |
| 268 | + try { | |
| 269 | + byte[] data = readOneBlock(inStream); | |
| 270 | + if (data != null) { | |
| 271 | + return new X509CertPath(new ByteArrayInputStream(data), encoding); | |
| 272 | + } else { | |
| 273 | + throw new IOException("Empty input"); | |
| 274 | + } | |
| 275 | + } catch (IOException ioe) { | |
| 276 | + throw new CertificateException(ioe.getMessage()); | |
| 277 | + } | |
| 278 | + } | |
| 279 | + | |
| 280 | + /** | |
| 281 | + * Generates a <code>CertPath</code> object and initializes it with | |
| 282 | + * a <code>List</code> of <code>Certificate</code>s. | |
| 283 | + * <p> | |
| 284 | + * The certificates supplied must be of a type supported by the | |
| 285 | + * <code>CertificateFactory</code>. They will be copied out of the supplied | |
| 286 | + * <code>List</code> object. | |
| 287 | + * | |
| 288 | + * @param certificates a <code>List</code> of <code>Certificate</code>s | |
| 289 | + * @return a <code>CertPath</code> initialized with the supplied list of | |
| 290 | + * certificates | |
| 291 | + * @exception CertificateException if an exception occurs | |
| 292 | + * @since 1.4 | |
| 293 | + */ | |
| 294 | + public CertPath | |
| 295 | + engineGenerateCertPath(List<? extends Certificate> certificates) | |
| 296 | + throws CertificateException | |
| 297 | + { | |
| 298 | + return(new X509CertPath(certificates)); | |
| 299 | + } | |
| 300 | + | |
| 301 | + /** | |
| 302 | + * Returns an iteration of the <code>CertPath</code> encodings supported | |
| 303 | + * by this certificate factory, with the default encoding first. | |
| 304 | + * <p> | |
| 305 | + * Attempts to modify the returned <code>Iterator</code> via its | |
| 306 | + * <code>remove</code> method result in an | |
| 307 | + * <code>UnsupportedOperationException</code>. | |
| 308 | + * | |
| 309 | + * @return an <code>Iterator</code> over the names of the supported | |
| 310 | + * <code>CertPath</code> encodings (as <code>String</code>s) | |
| 311 | + * @since 1.4 | |
| 312 | + */ | |
| 313 | + public Iterator<String> engineGetCertPathEncodings() { | |
| 314 | + return(X509CertPath.getEncodingsStatic()); | |
| 315 | + } | |
| 316 | + | |
| 317 | + /** | |
| 318 | + * Returns a (possibly empty) collection view of X.509 certificates read | |
| 319 | + * from the given input stream <code>is</code>. | |
| 320 | + * | |
| 321 | + * @param is the input stream with the certificates. | |
| 322 | + * | |
| 323 | + * @return a (possibly empty) collection view of X.509 certificate objects | |
| 324 | + * initialized with the data from the input stream. | |
| 325 | + * | |
| 326 | + * @exception CertificateException on parsing errors. | |
| 327 | + */ | |
| 328 | + public Collection<? extends java.security.cert.Certificate> | |
| 329 | + engineGenerateCertificates(InputStream is) | |
| 330 | + throws CertificateException { | |
| 331 | + if (is == null) { | |
| 332 | + throw new CertificateException("Missing input stream"); | |
| 333 | + } | |
| 334 | + try { | |
| 335 | + return parseX509orPKCS7Cert(is); | |
| 336 | + } catch (IOException ioe) { | |
| 337 | + throw new CertificateException(ioe); | |
| 338 | + } | |
| 339 | + } | |
| 340 | + | |
| 341 | + /** | |
| 342 | + * Generates an X.509 certificate revocation list (CRL) object and | |
| 343 | + * initializes it with the data read from the given input stream | |
| 344 | + * <code>is</code>. | |
| 345 | + * | |
| 346 | + * @param is an input stream with the CRL data. | |
| 347 | + * | |
| 348 | + * @return an X.509 CRL object initialized with the data | |
| 349 | + * from the input stream. | |
| 350 | + * | |
| 351 | + * @exception CRLException on parsing errors. | |
| 352 | + */ | |
| 353 | + public CRL engineGenerateCRL(InputStream is) | |
| 354 | + throws CRLException | |
| 355 | + { | |
| 356 | + if (is == null) { | |
| 357 | + // clear the cache (for debugging) | |
| 358 | + crlCache.clear(); | |
| 359 | + throw new CRLException("Missing input stream"); | |
| 360 | + } | |
| 361 | + try { | |
| 362 | + byte[] encoding = readOneBlock(is); | |
| 363 | + if (encoding != null) { | |
| 364 | + X509CRLImpl crl = (X509CRLImpl)getFromCache(crlCache, encoding); | |
| 365 | + if (crl != null) { | |
| 366 | + return crl; | |
| 367 | + } | |
| 368 | + crl = new X509CRLImpl(encoding); | |
| 369 | + addToCache(crlCache, crl.getEncodedInternal(), crl); | |
| 370 | + return crl; | |
| 371 | + } else { | |
| 372 | + throw new IOException("Empty input"); | |
| 373 | + } | |
| 374 | + } catch (IOException ioe) { | |
| 375 | + throw new CRLException(ioe.getMessage()); | |
| 376 | + } | |
| 377 | + } | |
| 378 | + | |
| 379 | + /** | |
| 380 | + * Returns a (possibly empty) collection view of X.509 CRLs read | |
| 381 | + * from the given input stream <code>is</code>. | |
| 382 | + * | |
| 383 | + * @param is the input stream with the CRLs. | |
| 384 | + * | |
| 385 | + * @return a (possibly empty) collection view of X.509 CRL objects | |
| 386 | + * initialized with the data from the input stream. | |
| 387 | + * | |
| 388 | + * @exception CRLException on parsing errors. | |
| 389 | + */ | |
| 390 | + public Collection<? extends java.security.cert.CRL> engineGenerateCRLs( | |
| 391 | + InputStream is) throws CRLException | |
| 392 | + { | |
| 393 | + if (is == null) { | |
| 394 | + throw new CRLException("Missing input stream"); | |
| 395 | + } | |
| 396 | + try { | |
| 397 | + return parseX509orPKCS7CRL(is); | |
| 398 | + } catch (IOException ioe) { | |
| 399 | + throw new CRLException(ioe.getMessage()); | |
| 400 | + } | |
| 401 | + } | |
| 402 | + | |
| 403 | + /* | |
| 404 | + * Parses the data in the given input stream as a sequence of DER | |
| 405 | + * encoded X.509 certificates (in binary or base 64 encoded format) OR | |
| 406 | + * as a single PKCS#7 encoded blob (in binary or base64 encoded format). | |
| 407 | + */ | |
| 408 | + private Collection<? extends java.security.cert.Certificate> | |
| 409 | + parseX509orPKCS7Cert(InputStream is) | |
| 410 | + throws CertificateException, IOException | |
| 411 | + { | |
| 412 | + Collection<X509CertImpl> coll = new ArrayList<>(); | |
| 413 | + byte[] data = readOneBlock(is); | |
| 414 | + if (data == null) { | |
| 415 | + return new ArrayList<>(0); | |
| 416 | + } | |
| 417 | + try { | |
| 418 | + PKCS7 pkcs7 = new PKCS7(data); | |
| 419 | + X509Certificate[] certs = pkcs7.getCertificates(); | |
| 420 | + // certs are optional in PKCS #7 | |
| 421 | + if (certs != null) { | |
| 422 | + return Arrays.asList(certs); | |
| 423 | + } else { | |
| 424 | + // no crls provided | |
| 425 | + return new ArrayList<>(0); | |
| 426 | + } | |
| 427 | + } catch (ParsingException e) { | |
| 428 | + while (data != null) { | |
| 429 | + coll.add(new X509CertImpl(data)); | |
| 430 | + data = readOneBlock(is); | |
| 431 | + } | |
| 432 | + } | |
| 433 | + return coll; | |
| 434 | + } | |
| 435 | + | |
| 436 | + /* | |
| 437 | + * Parses the data in the given input stream as a sequence of DER encoded | |
| 438 | + * X.509 CRLs (in binary or base 64 encoded format) OR as a single PKCS#7 | |
| 439 | + * encoded blob (in binary or base 64 encoded format). | |
| 440 | + */ | |
| 441 | + private Collection<? extends java.security.cert.CRL> | |
| 442 | + parseX509orPKCS7CRL(InputStream is) | |
| 443 | + throws CRLException, IOException | |
| 444 | + { | |
| 445 | + Collection<X509CRLImpl> coll = new ArrayList<>(); | |
| 446 | + byte[] data = readOneBlock(is); | |
| 447 | + if (data == null) { | |
| 448 | + return new ArrayList<>(0); | |
| 449 | + } | |
| 450 | + try { | |
| 451 | + PKCS7 pkcs7 = new PKCS7(data); | |
| 452 | + X509CRL[] crls = pkcs7.getCRLs(); | |
| 453 | + // CRLs are optional in PKCS #7 | |
| 454 | + if (crls != null) { | |
| 455 | + return Arrays.asList(crls); | |
| 456 | + } else { | |
| 457 | + // no crls provided | |
| 458 | + return new ArrayList<>(0); | |
| 459 | + } | |
| 460 | + } catch (ParsingException e) { | |
| 461 | + while (data != null) { | |
| 462 | + coll.add(new X509CRLImpl(data)); | |
| 463 | + data = readOneBlock(is); | |
| 464 | + } | |
| 465 | + } | |
| 466 | + return coll; | |
| 467 | + } | |
| 468 | + | |
| 469 | + /** | |
| 470 | + * Returns an ASN.1 SEQUENCE from a stream, which might be a BER-encoded | |
| 471 | + * binary block or a PEM-style BASE64-encoded ASCII data. In the latter | |
| 472 | + * case, it's de-BASE64'ed before return. | |
| 473 | + * | |
| 474 | + * After the reading, the input stream pointer is after the BER block, or | |
| 475 | + * after the newline character after the -----END SOMETHING----- line. | |
| 476 | + * | |
| 477 | + * @param is the InputStream | |
| 478 | + * @returns byte block or null if end of stream | |
| 479 | + * @throws IOException If any parsing error | |
| 480 | + */ | |
| 481 | + private static byte[] readOneBlock(InputStream is) throws IOException { | |
| 482 | + | |
| 483 | + // The first character of a BLOCK. | |
| 484 | + int c = is.read(); | |
| 485 | + if (c == -1) { | |
| 486 | + return null; | |
| 487 | + } | |
| 488 | + if (c == DerValue.tag_Sequence) { | |
| 489 | + ByteArrayOutputStream bout = new ByteArrayOutputStream(2048); | |
| 490 | + bout.write(c); | |
| 491 | + readBERInternal(is, bout, c); | |
| 492 | + return bout.toByteArray(); | |
| 493 | + } else { | |
| 494 | + // Read BASE64 encoded data, might skip info at the beginning | |
| 495 | + char[] data = new char[2048]; | |
| 496 | + int pos = 0; | |
| 497 | + | |
| 498 | + // Step 1: Read until header is found | |
| 499 | + int hyphen = (c=='-') ? 1: 0; // count of consequent hyphens | |
| 500 | + int last = (c=='-') ? -1: c; // the char before hyphen | |
| 501 | + while (true) { | |
| 502 | + int next = is.read(); | |
| 503 | + if (next == -1) { | |
| 504 | + // We accept useless data after the last block, | |
| 505 | + // say, empty lines. | |
| 506 | + return null; | |
| 507 | + } | |
| 508 | + if (next == '-') { | |
| 509 | + hyphen++; | |
| 510 | + } else { | |
| 511 | + hyphen = 0; | |
| 512 | + last = next; | |
| 513 | + } | |
| 514 | + if (hyphen == 5 && (last==-1 || last=='\r' || last=='\n')) { | |
| 515 | + break; | |
| 516 | + } | |
| 517 | + } | |
| 518 | + | |
| 519 | + // Step 2: Read the rest of header, determine the line end | |
| 520 | + int end; | |
| 521 | + StringBuffer header = new StringBuffer("-----"); | |
| 522 | + while (true) { | |
| 523 | + int next = is.read(); | |
| 524 | + if (next == -1) { | |
| 525 | + throw new IOException("Incomplete data"); | |
| 526 | + } | |
| 527 | + if (next == '\n') { | |
| 528 | + end = '\n'; | |
| 529 | + break; | |
| 530 | + } | |
| 531 | + if (next == '\r') { | |
| 532 | + next = is.read(); | |
| 533 | + if (next == -1) { | |
| 534 | + throw new IOException("Incomplete data"); | |
| 535 | + } | |
| 536 | + if (next == '\n') { | |
| 537 | + end = '\n'; | |
| 538 | + } else { | |
| 539 | + end = '\r'; | |
| 540 | + data[pos++] = (char)next; | |
| 541 | + } | |
| 542 | + break; | |
| 543 | + } | |
| 544 | + header.append((char)next); | |
| 545 | + } | |
| 546 | + | |
| 547 | + // Step 3: Read the data | |
| 548 | + while (true) { | |
| 549 | + int next = is.read(); | |
| 550 | + if (next == -1) { | |
| 551 | + throw new IOException("Incomplete data"); | |
| 552 | + } | |
| 553 | + if (next != '-') { | |
| 554 | + data[pos++] = (char)next; | |
| 555 | + if (pos >= data.length) { | |
| 556 | + data = Arrays.copyOf(data, data.length+1024); | |
| 557 | + } | |
| 558 | + } else { | |
| 559 | + break; | |
| 560 | + } | |
| 561 | + } | |
| 562 | + | |
| 563 | + // Step 4: Consume the footer | |
| 564 | + StringBuffer footer = new StringBuffer("-"); | |
| 565 | + while (true) { | |
| 566 | + int next = is.read(); | |
| 567 | + // Add next == '\n' for maximum safety, in case endline | |
| 568 | + // is not consistent. | |
| 569 | + if (next == -1 || next == end || next == '\n') { | |
| 570 | + break; | |
| 571 | + } | |
| 572 | + if (next != '\r') footer.append((char)next); | |
| 573 | + } | |
| 574 | + | |
| 575 | + checkHeaderFooter(header.toString(), footer.toString()); | |
| 576 | + | |
| 577 | + BASE64Decoder decoder = new BASE64Decoder(); | |
| 578 | + return decoder.decodeBuffer(new String(data, 0, pos)); | |
| 579 | + } | |
| 580 | + } | |
| 581 | + | |
| 582 | + private static void checkHeaderFooter(String header, | |
| 583 | + String footer) throws IOException { | |
| 584 | + if (header.length() < 16 || !header.startsWith("-----BEGIN ") || | |
| 585 | + !header.endsWith("-----")) { | |
| 586 | + throw new IOException("Illegal header: " + header); | |
| 587 | + } | |
| 588 | + if (footer.length() < 14 || !footer.startsWith("-----END ") || | |
| 589 | + !footer.endsWith("-----")) { | |
| 590 | + throw new IOException("Illegal footer: " + footer); | |
| 591 | + } | |
| 592 | + String headerType = header.substring(11, header.length()-5); | |
| 593 | + String footerType = footer.substring(9, footer.length()-5); | |
| 594 | + if (!headerType.equals(footerType)) { | |
| 595 | + throw new IOException("Header and footer do not match: " + | |
| 596 | + header + " " + footer); | |
| 597 | + } | |
| 598 | + } | |
| 599 | + | |
| 600 | + /** | |
| 601 | + * Read one BER data block. This method is aware of indefinite-length BER | |
| 602 | + * encoding and will read all of the sub-sections in a recursive way | |
| 603 | + * | |
| 604 | + * @param is Read from this InputStream | |
| 605 | + * @param bout Write into this OutputStream | |
| 606 | + * @param tag Tag already read (-1 mean not read) | |
| 607 | + * @returns The current tag, used to check EOC in indefinite-length BER | |
| 608 | + * @throws IOException Any parsing error | |
| 609 | + */ | |
| 610 | + private static int readBERInternal(InputStream is, | |
| 611 | + ByteArrayOutputStream bout, int tag) throws IOException { | |
| 612 | + | |
| 613 | + if (tag == -1) { // Not read before the call, read now | |
| 614 | + tag = is.read(); | |
| 615 | + if (tag == -1) { | |
| 616 | + throw new IOException("BER/DER tag info absent"); | |
| 617 | + } | |
| 618 | + if ((tag & 0x1f) == 0x1f) { | |
| 619 | + throw new IOException("Multi octets tag not supported"); | |
| 620 | + } | |
| 621 | + bout.write(tag); | |
| 622 | + } | |
| 623 | + | |
| 624 | + int n = is.read(); | |
| 625 | + if (n == -1) { | |
| 626 | + throw new IOException("BER/DER length info ansent"); | |
| 627 | + } | |
| 628 | + bout.write(n); | |
| 629 | + | |
| 630 | + int length; | |
| 631 | + | |
| 632 | + if (n == 0x80) { // Indefinite-length encoding | |
| 633 | + if ((tag & 0x20) != 0x20) { | |
| 634 | + throw new IOException( | |
| 635 | + "Non constructed encoding must have definite length"); | |
| 636 | + } | |
| 637 | + while (true) { | |
| 638 | + int subTag = readBERInternal(is, bout, -1); | |
| 639 | + if (subTag == 0) { // EOC, end of indefinite-length section | |
| 640 | + break; | |
| 641 | + } | |
| 642 | + } | |
| 643 | + } else { | |
| 644 | + if (n < 0x80) { | |
| 645 | + length = n; | |
| 646 | + } else if (n == 0x81) { | |
| 647 | + length = is.read(); | |
| 648 | + if (length == -1) { | |
| 649 | + throw new IOException("Incomplete BER/DER length info"); | |
| 650 | + } | |
| 651 | + bout.write(length); | |
| 652 | + } else if (n == 0x82) { | |
| 653 | + int highByte = is.read(); | |
| 654 | + int lowByte = is.read(); | |
| 655 | + if (lowByte == -1) { | |
| 656 | + throw new IOException("Incomplete BER/DER length info"); | |
| 657 | + } | |
| 658 | + bout.write(highByte); | |
| 659 | + bout.write(lowByte); | |
| 660 | + length = (highByte << 8) | lowByte; | |
| 661 | + } else if (n == 0x83) { | |
| 662 | + int highByte = is.read(); | |
| 663 | + int midByte = is.read(); | |
| 664 | + int lowByte = is.read(); | |
| 665 | + if (lowByte == -1) { | |
| 666 | + throw new IOException("Incomplete BER/DER length info"); | |
| 667 | + } | |
| 668 | + bout.write(highByte); | |
| 669 | + bout.write(midByte); | |
| 670 | + bout.write(lowByte); | |
| 671 | + length = (highByte << 16) | (midByte << 8) | lowByte; | |
| 672 | + } else { // ignore longer length forms | |
| 673 | + throw new IOException("Invalid BER/DER data (too huge?)"); | |
| 674 | + } | |
| 675 | + if (readFully(is, bout, length) != length) { | |
| 676 | + throw new IOException("Incomplete BER/DER data"); | |
| 677 | + } | |
| 678 | + } | |
| 679 | + return tag; | |
| 680 | + } | |
| 681 | +} | |