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| 1 | +/* | |
| 2 | + * Copyright (c) 2000, 2006, 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.BufferedInputStream; | |
| 29 | +import java.io.ByteArrayInputStream; | |
| 30 | +import java.io.ByteArrayOutputStream; | |
| 31 | +import java.io.IOException; | |
| 32 | +import java.io.InputStream; | |
| 33 | +import java.security.cert.CertificateEncodingException; | |
| 34 | +import java.security.cert.Certificate; | |
| 35 | +import java.security.cert.CertificateException; | |
| 36 | +import java.security.cert.CertificateFactory; | |
| 37 | +import java.security.cert.X509Certificate; | |
| 38 | +import java.util.*; | |
| 39 | +import java.security.cert.CertPath; | |
| 40 | +import sun.security.pkcs.ContentInfo; | |
| 41 | +import sun.security.pkcs.PKCS7; | |
| 42 | +import sun.security.pkcs.SignerInfo; | |
| 43 | +import sun.security.x509.AlgorithmId; | |
| 44 | +import sun.security.util.DerValue; | |
| 45 | +import sun.security.util.DerOutputStream; | |
| 46 | +import sun.security.util.DerInputStream; | |
| 47 | + | |
| 48 | + | |
| 49 | +/** | |
| 50 | + * A {@link java.security.cert.CertPath CertPath} (certification path) | |
| 51 | + * consisting exclusively of | |
| 52 | + * {@link java.security.cert.X509Certificate X509Certificate}s. | |
| 53 | + * <p> | |
| 54 | + * By convention, X.509 <code>CertPath</code>s are stored from target | |
| 55 | + * to trust anchor. | |
| 56 | + * That is, the issuer of one certificate is the subject of the following | |
| 57 | + * one. However, unvalidated X.509 <code>CertPath</code>s may not follow | |
| 58 | + * this convention. PKIX <code>CertPathValidator</code>s will detect any | |
| 59 | + * departure from this convention and throw a | |
| 60 | + * <code>CertPathValidatorException</code>. | |
| 61 | + * | |
| 62 | + * @author Yassir Elley | |
| 63 | + * @since 1.4 | |
| 64 | + */ | |
| 65 | +public class X509CertPath extends CertPath { | |
| 66 | + | |
| 67 | + private static final long serialVersionUID = 4989800333263052980L; | |
| 68 | + | |
| 69 | + /** | |
| 70 | + * List of certificates in this chain | |
| 71 | + */ | |
| 72 | + private List<X509Certificate> certs; | |
| 73 | + | |
| 74 | + /** | |
| 75 | + * The names of our encodings. PkiPath is the default. | |
| 76 | + */ | |
| 77 | + private static final String COUNT_ENCODING = "count"; | |
| 78 | + private static final String PKCS7_ENCODING = "PKCS7"; | |
| 79 | + private static final String PKIPATH_ENCODING = "PkiPath"; | |
| 80 | + | |
| 81 | + /** | |
| 82 | + * List of supported encodings | |
| 83 | + */ | |
| 84 | + private static final Collection<String> encodingList; | |
| 85 | + | |
| 86 | + static { | |
| 87 | + List<String> list = new ArrayList<String>(2); | |
| 88 | + list.add(PKIPATH_ENCODING); | |
| 89 | + list.add(PKCS7_ENCODING); | |
| 90 | + encodingList = Collections.unmodifiableCollection(list); | |
| 91 | + } | |
| 92 | + | |
| 93 | + /** | |
| 94 | + * Creates an <code>X509CertPath</code> from a <code>List</code> of | |
| 95 | + * <code>X509Certificate</code>s. | |
| 96 | + * <p> | |
| 97 | + * The certificates are copied out of the supplied <code>List</code> | |
| 98 | + * object. | |
| 99 | + * | |
| 100 | + * @param certs a <code>List</code> of <code>X509Certificate</code>s | |
| 101 | + * @exception CertificateException if <code>certs</code> contains an element | |
| 102 | + * that is not an <code>X509Certificate</code> | |
| 103 | + */ | |
| 104 | + public X509CertPath(List<? extends Certificate> certs) throws CertificateException { | |
| 105 | + super("X.509"); | |
| 106 | + | |
| 107 | + // Ensure that the List contains only X509Certificates | |
| 108 | + for (Object obj : (List<?>)certs) { | |
| 109 | + if (obj instanceof X509Certificate == false) { | |
| 110 | + throw new CertificateException | |
| 111 | + ("List is not all X509Certificates: " | |
| 112 | + + obj.getClass().getName()); | |
| 113 | + } | |
| 114 | + } | |
| 115 | + | |
| 116 | + // Assumes that the resulting List is thread-safe. This is true | |
| 117 | + // because we ensure that it cannot be modified after construction | |
| 118 | + // and the methods in the Sun JDK 1.4 implementation of ArrayList that | |
| 119 | + // allow read-only access are thread-safe. | |
| 120 | + this.certs = Collections.unmodifiableList( | |
| 121 | + new ArrayList<X509Certificate>((List<X509Certificate>)certs)); | |
| 122 | + } | |
| 123 | + | |
| 124 | + /** | |
| 125 | + * Creates an <code>X509CertPath</code>, reading the encoded form | |
| 126 | + * from an <code>InputStream</code>. The data is assumed to be in | |
| 127 | + * the default encoding. | |
| 128 | + * | |
| 129 | + * @param is the <code>InputStream</code> to read the data from | |
| 130 | + * @exception CertificateException if an exception occurs while decoding | |
| 131 | + */ | |
| 132 | + public X509CertPath(InputStream is) throws CertificateException { | |
| 133 | + this(is, PKIPATH_ENCODING); | |
| 134 | + } | |
| 135 | + | |
| 136 | + /** | |
| 137 | + * Creates an <code>X509CertPath</code>, reading the encoded form | |
| 138 | + * from an InputStream. The data is assumed to be in the specified | |
| 139 | + * encoding. | |
| 140 | + * | |
| 141 | + * @param is the <code>InputStream</code> to read the data from | |
| 142 | + * @param encoding the encoding used | |
| 143 | + * @exception CertificateException if an exception occurs while decoding or | |
| 144 | + * the encoding requested is not supported | |
| 145 | + */ | |
| 146 | + public X509CertPath(InputStream is, String encoding) | |
| 147 | + throws CertificateException { | |
| 148 | + super("X.509"); | |
| 149 | + | |
| 150 | + if (PKIPATH_ENCODING.equals(encoding)) { | |
| 151 | + certs = parsePKIPATH(is); | |
| 152 | + } else if (PKCS7_ENCODING.equals(encoding)) { | |
| 153 | + certs = parsePKCS7(is); | |
| 154 | + } else { | |
| 155 | + throw new CertificateException("unsupported encoding"); | |
| 156 | + } | |
| 157 | + } | |
| 158 | + | |
| 159 | + /** | |
| 160 | + * Parse a PKIPATH format CertPath from an InputStream. Return an | |
| 161 | + * unmodifiable List of the certificates. | |
| 162 | + * | |
| 163 | + * @param is the <code>InputStream</code> to read the data from | |
| 164 | + * @return an unmodifiable List of the certificates | |
| 165 | + * @exception CertificateException if an exception occurs | |
| 166 | + */ | |
| 167 | + private static List<X509Certificate> parsePKIPATH(InputStream is) | |
| 168 | + throws CertificateException { | |
| 169 | + List<X509Certificate> certList = null; | |
| 170 | + CertificateFactory certFac = null; | |
| 171 | + | |
| 172 | + if (is == null) { | |
| 173 | + throw new CertificateException("input stream is null"); | |
| 174 | + } | |
| 175 | + | |
| 176 | + try { | |
| 177 | + DerInputStream dis = new DerInputStream(readAllBytes(is)); | |
| 178 | + DerValue[] seq = dis.getSequence(3); | |
| 179 | + if (seq.length == 0) { | |
| 180 | + return Collections.<X509Certificate>emptyList(); | |
| 181 | + } | |
| 182 | + | |
| 183 | + certFac = CertificateFactory.getInstance("X.509"); | |
| 184 | + certList = new ArrayList<X509Certificate>(seq.length); | |
| 185 | + | |
| 186 | + // append certs in reverse order (target to trust anchor) | |
| 187 | + for (int i = seq.length-1; i >= 0; i--) { | |
| 188 | + certList.add((X509Certificate)certFac.generateCertificate | |
| 189 | + (new ByteArrayInputStream(seq[i].toByteArray()))); | |
| 190 | + } | |
| 191 | + | |
| 192 | + return Collections.unmodifiableList(certList); | |
| 193 | + | |
| 194 | + } catch (IOException ioe) { | |
| 195 | + CertificateException ce = new CertificateException("IOException" + | |
| 196 | + " parsing PkiPath data: " + ioe); | |
| 197 | + ce.initCause(ioe); | |
| 198 | + throw ce; | |
| 199 | + } | |
| 200 | + } | |
| 201 | + | |
| 202 | + /** | |
| 203 | + * Parse a PKCS#7 format CertPath from an InputStream. Return an | |
| 204 | + * unmodifiable List of the certificates. | |
| 205 | + * | |
| 206 | + * @param is the <code>InputStream</code> to read the data from | |
| 207 | + * @return an unmodifiable List of the certificates | |
| 208 | + * @exception CertificateException if an exception occurs | |
| 209 | + */ | |
| 210 | + private static List<X509Certificate> parsePKCS7(InputStream is) | |
| 211 | + throws CertificateException { | |
| 212 | + List<X509Certificate> certList; | |
| 213 | + | |
| 214 | + if (is == null) { | |
| 215 | + throw new CertificateException("input stream is null"); | |
| 216 | + } | |
| 217 | + | |
| 218 | + try { | |
| 219 | + if (is.markSupported() == false) { | |
| 220 | + // Copy the entire input stream into an InputStream that does | |
| 221 | + // support mark | |
| 222 | + is = new ByteArrayInputStream(readAllBytes(is)); | |
| 223 | + }; | |
| 224 | + PKCS7 pkcs7 = new PKCS7(is); | |
| 225 | + | |
| 226 | + X509Certificate[] certArray = pkcs7.getCertificates(); | |
| 227 | + // certs are optional in PKCS #7 | |
| 228 | + if (certArray != null) { | |
| 229 | + certList = Arrays.asList(certArray); | |
| 230 | + } else { | |
| 231 | + // no certs provided | |
| 232 | + certList = new ArrayList<X509Certificate>(0); | |
| 233 | + } | |
| 234 | + } catch (IOException ioe) { | |
| 235 | + throw new CertificateException("IOException parsing PKCS7 data: " + | |
| 236 | + ioe); | |
| 237 | + } | |
| 238 | + // Assumes that the resulting List is thread-safe. This is true | |
| 239 | + // because we ensure that it cannot be modified after construction | |
| 240 | + // and the methods in the Sun JDK 1.4 implementation of ArrayList that | |
| 241 | + // allow read-only access are thread-safe. | |
| 242 | + return Collections.unmodifiableList(certList); | |
| 243 | + } | |
| 244 | + | |
| 245 | + /* | |
| 246 | + * Reads the entire contents of an InputStream into a byte array. | |
| 247 | + * | |
| 248 | + * @param is the InputStream to read from | |
| 249 | + * @return the bytes read from the InputStream | |
| 250 | + */ | |
| 251 | + private static byte[] readAllBytes(InputStream is) throws IOException { | |
| 252 | + byte[] buffer = new byte[8192]; | |
| 253 | + ByteArrayOutputStream baos = new ByteArrayOutputStream(2048); | |
| 254 | + int n; | |
| 255 | + while ((n = is.read(buffer)) != -1) { | |
| 256 | + baos.write(buffer, 0, n); | |
| 257 | + } | |
| 258 | + return baos.toByteArray(); | |
| 259 | + } | |
| 260 | + | |
| 261 | + /** | |
| 262 | + * Returns the encoded form of this certification path, using the | |
| 263 | + * default encoding. | |
| 264 | + * | |
| 265 | + * @return the encoded bytes | |
| 266 | + * @exception CertificateEncodingException if an encoding error occurs | |
| 267 | + */ | |
| 268 | + public byte[] getEncoded() throws CertificateEncodingException { | |
| 269 | + // @@@ Should cache the encoded form | |
| 270 | + return encodePKIPATH(); | |
| 271 | + } | |
| 272 | + | |
| 273 | + /** | |
| 274 | + * Encode the CertPath using PKIPATH format. | |
| 275 | + * | |
| 276 | + * @return a byte array containing the binary encoding of the PkiPath object | |
| 277 | + * @exception CertificateEncodingException if an exception occurs | |
| 278 | + */ | |
| 279 | + private byte[] encodePKIPATH() throws CertificateEncodingException { | |
| 280 | + | |
| 281 | + ListIterator<X509Certificate> li = certs.listIterator(certs.size()); | |
| 282 | + try { | |
| 283 | + DerOutputStream bytes = new DerOutputStream(); | |
| 284 | + // encode certs in reverse order (trust anchor to target) | |
| 285 | + // according to PkiPath format | |
| 286 | + while (li.hasPrevious()) { | |
| 287 | + X509Certificate cert = li.previous(); | |
| 288 | + // check for duplicate cert | |
| 289 | + if (certs.lastIndexOf(cert) != certs.indexOf(cert)) { | |
| 290 | + throw new CertificateEncodingException | |
| 291 | + ("Duplicate Certificate"); | |
| 292 | + } | |
| 293 | + // get encoded certificates | |
| 294 | + byte[] encoded = cert.getEncoded(); | |
| 295 | + bytes.write(encoded); | |
| 296 | + } | |
| 297 | + | |
| 298 | + // Wrap the data in a SEQUENCE | |
| 299 | + DerOutputStream derout = new DerOutputStream(); | |
| 300 | + derout.write(DerValue.tag_SequenceOf, bytes); | |
| 301 | + return derout.toByteArray(); | |
| 302 | + | |
| 303 | + } catch (IOException ioe) { | |
| 304 | + CertificateEncodingException ce = new CertificateEncodingException | |
| 305 | + ("IOException encoding PkiPath data: " + ioe); | |
| 306 | + ce.initCause(ioe); | |
| 307 | + throw ce; | |
| 308 | + } | |
| 309 | + } | |
| 310 | + | |
| 311 | + /** | |
| 312 | + * Encode the CertPath using PKCS#7 format. | |
| 313 | + * | |
| 314 | + * @return a byte array containing the binary encoding of the PKCS#7 object | |
| 315 | + * @exception CertificateEncodingException if an exception occurs | |
| 316 | + */ | |
| 317 | + private byte[] encodePKCS7() throws CertificateEncodingException { | |
| 318 | + PKCS7 p7 = new PKCS7(new AlgorithmId[0], | |
| 319 | + new ContentInfo(ContentInfo.DATA_OID, null), | |
| 320 | + certs.toArray(new X509Certificate[certs.size()]), | |
| 321 | + new SignerInfo[0]); | |
| 322 | + DerOutputStream derout = new DerOutputStream(); | |
| 323 | + try { | |
| 324 | + p7.encodeSignedData(derout); | |
| 325 | + } catch (IOException ioe) { | |
| 326 | + throw new CertificateEncodingException(ioe.getMessage()); | |
| 327 | + } | |
| 328 | + return derout.toByteArray(); | |
| 329 | + } | |
| 330 | + | |
| 331 | + /** | |
| 332 | + * Returns the encoded form of this certification path, using the | |
| 333 | + * specified encoding. | |
| 334 | + * | |
| 335 | + * @param encoding the name of the encoding to use | |
| 336 | + * @return the encoded bytes | |
| 337 | + * @exception CertificateEncodingException if an encoding error occurs or | |
| 338 | + * the encoding requested is not supported | |
| 339 | + */ | |
| 340 | + public byte[] getEncoded(String encoding) | |
| 341 | + throws CertificateEncodingException { | |
| 342 | + if (PKIPATH_ENCODING.equals(encoding)) { | |
| 343 | + return encodePKIPATH(); | |
| 344 | + } else if (PKCS7_ENCODING.equals(encoding)) { | |
| 345 | + return encodePKCS7(); | |
| 346 | + } else { | |
| 347 | + throw new CertificateEncodingException("unsupported encoding"); | |
| 348 | + } | |
| 349 | + } | |
| 350 | + | |
| 351 | + /** | |
| 352 | + * Returns the encodings supported by this certification path, with the | |
| 353 | + * default encoding first. | |
| 354 | + * | |
| 355 | + * @return an <code>Iterator</code> over the names of the supported | |
| 356 | + * encodings (as Strings) | |
| 357 | + */ | |
| 358 | + public static Iterator<String> getEncodingsStatic() { | |
| 359 | + return encodingList.iterator(); | |
| 360 | + } | |
| 361 | + | |
| 362 | + /** | |
| 363 | + * Returns an iteration of the encodings supported by this certification | |
| 364 | + * path, with the default encoding first. | |
| 365 | + * <p> | |
| 366 | + * Attempts to modify the returned <code>Iterator</code> via its | |
| 367 | + * <code>remove</code> method result in an | |
| 368 | + * <code>UnsupportedOperationException</code>. | |
| 369 | + * | |
| 370 | + * @return an <code>Iterator</code> over the names of the supported | |
| 371 | + * encodings (as Strings) | |
| 372 | + */ | |
| 373 | + public Iterator<String> getEncodings() { | |
| 374 | + return getEncodingsStatic(); | |
| 375 | + } | |
| 376 | + | |
| 377 | + /** | |
| 378 | + * Returns the list of certificates in this certification path. | |
| 379 | + * The <code>List</code> returned must be immutable and thread-safe. | |
| 380 | + * | |
| 381 | + * @return an immutable <code>List</code> of <code>X509Certificate</code>s | |
| 382 | + * (may be empty, but not null) | |
| 383 | + */ | |
| 384 | + public List<X509Certificate> getCertificates() { | |
| 385 | + return certs; | |
| 386 | + } | |
| 387 | +} | |