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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 | } | ||