1 /*
2 * Copyright (c) 1997, 2018, 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 java.util.jar;
27
28 import jdk.internal.misc.SharedSecrets;
29 import jdk.internal.misc.JavaUtilZipFileAccess;
30 import sun.security.action.GetPropertyAction;
31 import sun.security.util.ManifestEntryVerifier;
32 import sun.security.util.SignatureFileVerifier;
33
34 import java.io.ByteArrayInputStream;
35 import java.io.EOFException;
36 import java.io.File;
37 import java.io.IOException;
38 import java.io.InputStream;
39 import java.lang.ref.SoftReference;
40 import java.net.URL;
41 import java.security.CodeSigner;
42 import java.security.CodeSource;
43 import java.security.cert.Certificate;
44 import java.util.ArrayList;
45 import java.util.Collections;
46 import java.util.Enumeration;
47 import java.util.List;
48 import java.util.Locale;
49 import java.util.NoSuchElementException;
50 import java.util.Objects;
51 import java.util.function.Function;
52 import java.util.stream.Stream;
53 import java.util.zip.ZipEntry;
54 import java.util.zip.ZipException;
55 import java.util.zip.ZipFile;
56
57 /**
58 * The {@code JarFile} class is used to read the contents of a jar file
59 * from any file that can be opened with {@code java.io.RandomAccessFile}.
60 * It extends the class {@code java.util.zip.ZipFile} with support
61 * for reading an optional {@code Manifest} entry, and support for
62 * processing multi-release jar files. The {@code Manifest} can be used
63 * to specify meta-information about the jar file and its entries.
64 *
65 * <p><a id="multirelease">A multi-release jar file</a> is a jar file that
66 * contains a manifest with a main attribute named "Multi-Release",
67 * a set of "base" entries, some of which are public classes with public
68 * or protected methods that comprise the public interface of the jar file,
69 * and a set of "versioned" entries contained in subdirectories of the
70 * "META-INF/versions" directory. The versioned entries are partitioned by the
71 * major version of the Java platform. A versioned entry, with a version
72 * {@code n}, {@code 8 < n}, in the "META-INF/versions/{n}" directory overrides
73 * the base entry as well as any entry with a version number {@code i} where
74 * {@code 8 < i < n}.
75 *
76 * <p>By default, a {@code JarFile} for a multi-release jar file is configured
77 * to process the multi-release jar file as if it were a plain (unversioned) jar
78 * file, and as such an entry name is associated with at most one base entry.
79 * The {@code JarFile} may be configured to process a multi-release jar file by
80 * creating the {@code JarFile} with the
81 * {@link JarFile#JarFile(File, boolean, int, Runtime.Version)} constructor. The
82 * {@code Runtime.Version} object sets a maximum version used when searching for
83 * versioned entries. When so configured, an entry name
84 * can correspond with at most one base entry and zero or more versioned
85 * entries. A search is required to associate the entry name with the latest
86 * versioned entry whose version is less than or equal to the maximum version
87 * (see {@link #getEntry(String)}).
88 *
89 * <p>Class loaders that utilize {@code JarFile} to load classes from the
90 * contents of {@code JarFile} entries should construct the {@code JarFile}
91 * by invoking the {@link JarFile#JarFile(File, boolean, int, Runtime.Version)}
92 * constructor with the value {@code Runtime.version()} assigned to the last
93 * argument. This assures that classes compatible with the major
94 * version of the running JVM are loaded from multi-release jar files.
95 *
96 * <p> If the {@code verify} flag is on when opening a signed jar file, the content
97 * of the jar entry is verified against the signature embedded inside the manifest
98 * that is associated with its {@link JarEntry#getRealName() path name}. For a
99 * multi-release jar file, the content of a versioned entry is verfieid against
100 * its own signature and {@link JarEntry#getCodeSigners()} returns its own signers.
101 *
102 * Please note that the verification process does not include validating the
103 * signer's certificate. A caller should inspect the return value of
104 * {@link JarEntry#getCodeSigners()} to further determine if the signature
105 * can be trusted.
106 *
107 * <p> Unless otherwise noted, passing a {@code null} argument to a constructor
108 * or method in this class will cause a {@link NullPointerException} to be
109 * thrown.
110 *
111 * @implNote
112 * <div class="block">
113 * If the API can not be used to configure a {@code JarFile} (e.g. to override
114 * the configuration of a compiled application or library), two {@code System}
115 * properties are available.
116 * <ul>
117 * <li>
118 * {@code jdk.util.jar.version} can be assigned a value that is the
119 * {@code String} representation of a non-negative integer
120 * {@code <= Runtime.version().feature()}. The value is used to set the effective
121 * runtime version to something other than the default value obtained by
122 * evaluating {@code Runtime.version().feature()}. The effective runtime version
123 * is the version that the {@link JarFile#JarFile(File, boolean, int, Runtime.Version)}
124 * constructor uses when the value of the last argument is
125 * {@code JarFile.runtimeVersion()}.
126 * </li>
127 * <li>
128 * {@code jdk.util.jar.enableMultiRelease} can be assigned one of the three
129 * {@code String} values <em>true</em>, <em>false</em>, or <em>force</em>. The
130 * value <em>true</em>, the default value, enables multi-release jar file
131 * processing. The value <em>false</em> disables multi-release jar processing,
132 * ignoring the "Multi-Release" manifest attribute, and the versioned
133 * directories in a multi-release jar file if they exist. Furthermore,
134 * the method {@link JarFile#isMultiRelease()} returns <em>false</em>. The value
135 * <em>force</em> causes the {@code JarFile} to be initialized to runtime
136 * versioning after construction. It effectively does the same as this code:
137 * {@code (new JarFile(File, boolean, int, JarFile.runtimeVersion())}.
138 * </li>
139 * </ul>
140 * </div>
141 *
142 * @author David Connelly
143 * @see Manifest
144 * @see java.util.zip.ZipFile
145 * @see java.util.jar.JarEntry
146 * @since 1.2
147 */
148 public
149 class JarFile extends ZipFile {
150 private final static Runtime.Version BASE_VERSION;
151 private final static int BASE_VERSION_FEATURE;
152 private final static Runtime.Version RUNTIME_VERSION;
153 private final static boolean MULTI_RELEASE_ENABLED;
154 private final static boolean MULTI_RELEASE_FORCED;
155 private SoftReference<Manifest> manRef;
156 private JarEntry manEntry;
157 private JarVerifier jv;
158 private boolean jvInitialized;
159 private boolean verify;
160 private final Runtime.Version version; // current version
161 private final int versionFeature; // version.feature()
162 private boolean isMultiRelease; // is jar multi-release?
163
164 // indicates if Class-Path attribute present
165 private boolean hasClassPathAttribute;
166 // true if manifest checked for special attributes
167 private volatile boolean hasCheckedSpecialAttributes;
168
169 private static final JavaUtilZipFileAccess JUZFA;
170
171 static {
172 // Set up JavaUtilJarAccess in SharedSecrets
173 SharedSecrets.setJavaUtilJarAccess(new JavaUtilJarAccessImpl());
174 // Get JavaUtilZipFileAccess from SharedSecrets
175 JUZFA = jdk.internal.misc.SharedSecrets.getJavaUtilZipFileAccess();
176 // multi-release jar file versions >= 9
177 BASE_VERSION = Runtime.Version.parse(Integer.toString(8));
178 BASE_VERSION_FEATURE = BASE_VERSION.feature();
179 String jarVersion = GetPropertyAction.privilegedGetProperty("jdk.util.jar.version");
180 int runtimeVersion = Runtime.version().feature();
181 if (jarVersion != null) {
182 int jarVer = Integer.parseInt(jarVersion);
183 runtimeVersion = (jarVer > runtimeVersion)
184 ? runtimeVersion
185 : Math.max(jarVer, BASE_VERSION_FEATURE);
186 }
187 RUNTIME_VERSION = Runtime.Version.parse(Integer.toString(runtimeVersion));
188 String enableMultiRelease = GetPropertyAction
189 .privilegedGetProperty("jdk.util.jar.enableMultiRelease", "true");
190 switch (enableMultiRelease) {
191 case "true":
192 default:
193 MULTI_RELEASE_ENABLED = true;
194 MULTI_RELEASE_FORCED = false;
195 break;
196 case "false":
197 MULTI_RELEASE_ENABLED = false;
198 MULTI_RELEASE_FORCED = false;
199 break;
200 case "force":
201 MULTI_RELEASE_ENABLED = true;
202 MULTI_RELEASE_FORCED = true;
203 break;
204 }
205 }
206
207 private static final String META_INF = "META-INF/";
208
209 private static final String META_INF_VERSIONS = META_INF + "versions/";
210
211 /**
212 * The JAR manifest file name.
213 */
214 public static final String MANIFEST_NAME = META_INF + "MANIFEST.MF";
215
216 /**
217 * Returns the version that represents the unversioned configuration of a
218 * multi-release jar file.
219 *
220 * @return the version that represents the unversioned configuration
221 *
222 * @since 9
223 */
224 public static Runtime.Version baseVersion() {
225 return BASE_VERSION;
226 }
227
228 /**
229 * Returns the version that represents the effective runtime versioned
230 * configuration of a multi-release jar file.
231 * <p>
232 * By default the feature version number of the returned {@code Version} will
233 * be equal to the feature version number of {@code Runtime.version()}.
234 * However, if the {@code jdk.util.jar.version} property is set, the
235 * returned {@code Version} is derived from that property and feature version
236 * numbers may not be equal.
237 *
238 * @return the version that represents the runtime versioned configuration
239 *
240 * @since 9
241 */
242 public static Runtime.Version runtimeVersion() {
243 return RUNTIME_VERSION;
244 }
245
246 /**
247 * Creates a new {@code JarFile} to read from the specified
248 * file {@code name}. The {@code JarFile} will be verified if
249 * it is signed.
250 * @param name the name of the jar file to be opened for reading
251 * @throws IOException if an I/O error has occurred
252 * @throws SecurityException if access to the file is denied
253 * by the SecurityManager
254 */
255 public JarFile(String name) throws IOException {
256 this(new File(name), true, ZipFile.OPEN_READ);
257 }
258
259 /**
260 * Creates a new {@code JarFile} to read from the specified
261 * file {@code name}.
262 * @param name the name of the jar file to be opened for reading
263 * @param verify whether or not to verify the jar file if
264 * it is signed.
265 * @throws IOException if an I/O error has occurred
266 * @throws SecurityException if access to the file is denied
267 * by the SecurityManager
268 */
269 public JarFile(String name, boolean verify) throws IOException {
270 this(new File(name), verify, ZipFile.OPEN_READ);
271 }
272
273 /**
274 * Creates a new {@code JarFile} to read from the specified
275 * {@code File} object. The {@code JarFile} will be verified if
276 * it is signed.
277 * @param file the jar file to be opened for reading
278 * @throws IOException if an I/O error has occurred
279 * @throws SecurityException if access to the file is denied
280 * by the SecurityManager
281 */
282 public JarFile(File file) throws IOException {
283 this(file, true, ZipFile.OPEN_READ);
284 }
285
286 /**
287 * Creates a new {@code JarFile} to read from the specified
288 * {@code File} object.
289 * @param file the jar file to be opened for reading
290 * @param verify whether or not to verify the jar file if
291 * it is signed.
292 * @throws IOException if an I/O error has occurred
293 * @throws SecurityException if access to the file is denied
294 * by the SecurityManager.
295 */
296 public JarFile(File file, boolean verify) throws IOException {
297 this(file, verify, ZipFile.OPEN_READ);
298 }
299
300 /**
301 * Creates a new {@code JarFile} to read from the specified
302 * {@code File} object in the specified mode. The mode argument
303 * must be either {@code OPEN_READ} or {@code OPEN_READ | OPEN_DELETE}.
304 *
305 * @param file the jar file to be opened for reading
306 * @param verify whether or not to verify the jar file if
307 * it is signed.
308 * @param mode the mode in which the file is to be opened
309 * @throws IOException if an I/O error has occurred
310 * @throws IllegalArgumentException
311 * if the {@code mode} argument is invalid
312 * @throws SecurityException if access to the file is denied
313 * by the SecurityManager
314 * @since 1.3
315 */
316 public JarFile(File file, boolean verify, int mode) throws IOException {
317 this(file, verify, mode, BASE_VERSION);
318 }
319
320 /**
321 * Creates a new {@code JarFile} to read from the specified
322 * {@code File} object in the specified mode. The mode argument
323 * must be either {@code OPEN_READ} or {@code OPEN_READ | OPEN_DELETE}.
324 * The version argument, after being converted to a canonical form, is
325 * used to configure the {@code JarFile} for processing
326 * multi-release jar files.
327 * <p>
328 * The canonical form derived from the version parameter is
329 * {@code Runtime.Version.parse(Integer.toString(n))} where {@code n} is
330 * {@code Math.max(version.feature(), JarFile.baseVersion().feature())}.
331 *
332 * @param file the jar file to be opened for reading
333 * @param verify whether or not to verify the jar file if
334 * it is signed.
335 * @param mode the mode in which the file is to be opened
336 * @param version specifies the release version for a multi-release jar file
337 * @throws IOException if an I/O error has occurred
338 * @throws IllegalArgumentException
339 * if the {@code mode} argument is invalid
340 * @throws SecurityException if access to the file is denied
341 * by the SecurityManager
342 * @throws NullPointerException if {@code version} is {@code null}
343 * @since 9
344 */
345 public JarFile(File file, boolean verify, int mode, Runtime.Version version) throws IOException {
346 super(file, mode);
347 this.verify = verify;
348 Objects.requireNonNull(version);
349 if (MULTI_RELEASE_FORCED || version.feature() == RUNTIME_VERSION.feature()) {
350 // This deals with the common case where the value from JarFile.runtimeVersion() is passed
351 this.version = RUNTIME_VERSION;
352 } else if (version.feature() <= BASE_VERSION_FEATURE) {
353 // This also deals with the common case where the value from JarFile.baseVersion() is passed
354 this.version = BASE_VERSION;
355 } else {
356 // Canonicalize
357 this.version = Runtime.Version.parse(Integer.toString(version.feature()));
358 }
359 this.versionFeature = this.version.feature();
360 }
361
362 /**
363 * Returns the maximum version used when searching for versioned entries.
364 * <p>
365 * If this {@code JarFile} is not a multi-release jar file or is not
366 * configured to be processed as such, then the version returned will be the
367 * same as that returned from {@link #baseVersion()}.
368 *
369 * @return the maximum version
370 * @since 9
371 */
372 public final Runtime.Version getVersion() {
373 return isMultiRelease() ? this.version : BASE_VERSION;
374 }
375
376 /**
377 * Indicates whether or not this jar file is a multi-release jar file.
378 *
379 * @return true if this JarFile is a multi-release jar file
380 * @since 9
381 */
382 public final boolean isMultiRelease() {
383 if (isMultiRelease) {
384 return true;
385 }
386 if (MULTI_RELEASE_ENABLED) {
387 try {
388 checkForSpecialAttributes();
389 } catch (IOException io) {
390 isMultiRelease = false;
391 }
392 }
393 return isMultiRelease;
394 }
395
396 /**
397 * Returns the jar file manifest, or {@code null} if none.
398 *
399 * @return the jar file manifest, or {@code null} if none
400 *
401 * @throws IllegalStateException
402 * may be thrown if the jar file has been closed
403 * @throws IOException if an I/O error has occurred
404 */
405 public Manifest getManifest() throws IOException {
406 return getManifestFromReference();
407 }
408
409 private Manifest getManifestFromReference() throws IOException {
410 Manifest man = manRef != null ? manRef.get() : null;
411
412 if (man == null) {
413
414 JarEntry manEntry = getManEntry();
415
416 // If found then load the manifest
417 if (manEntry != null) {
418 if (verify) {
419 byte[] b = getBytes(manEntry);
420 if (!jvInitialized) {
421 jv = new JarVerifier(b);
422 }
423 man = new Manifest(jv, new ByteArrayInputStream(b));
424 } else {
425 man = new Manifest(super.getInputStream(manEntry));
426 }
427 manRef = new SoftReference<>(man);
428 }
429 }
430 return man;
431 }
432
433 private String[] getMetaInfEntryNames() {
434 return JUZFA.getMetaInfEntryNames((ZipFile)this);
435 }
436
437 /**
438 * Returns the {@code JarEntry} for the given base entry name or
439 * {@code null} if not found.
440 *
441 * <p>If this {@code JarFile} is a multi-release jar file and is configured
442 * to be processed as such, then a search is performed to find and return
443 * a {@code JarEntry} that is the latest versioned entry associated with the
444 * given entry name. The returned {@code JarEntry} is the versioned entry
445 * corresponding to the given base entry name prefixed with the string
446 * {@code "META-INF/versions/{n}/"}, for the largest value of {@code n} for
447 * which an entry exists. If such a versioned entry does not exist, then
448 * the {@code JarEntry} for the base entry is returned, otherwise
449 * {@code null} is returned if no entries are found. The initial value for
450 * the version {@code n} is the maximum version as returned by the method
451 * {@link JarFile#getVersion()}.
452 *
453 * @param name the jar file entry name
454 * @return the {@code JarEntry} for the given entry name, or
455 * the versioned entry name, or {@code null} if not found
456 *
457 * @throws IllegalStateException
458 * may be thrown if the jar file has been closed
459 *
460 * @see java.util.jar.JarEntry
461 *
462 * @implSpec
463 * <div class="block">
464 * This implementation invokes {@link JarFile#getEntry(String)}.
465 * </div>
466 */
467 public JarEntry getJarEntry(String name) {
468 return (JarEntry)getEntry(name);
469 }
470
471 /**
472 * Returns the {@code ZipEntry} for the given base entry name or
473 * {@code null} if not found.
474 *
475 * <p>If this {@code JarFile} is a multi-release jar file and is configured
476 * to be processed as such, then a search is performed to find and return
477 * a {@code ZipEntry} that is the latest versioned entry associated with the
478 * given entry name. The returned {@code ZipEntry} is the versioned entry
479 * corresponding to the given base entry name prefixed with the string
480 * {@code "META-INF/versions/{n}/"}, for the largest value of {@code n} for
481 * which an entry exists. If such a versioned entry does not exist, then
482 * the {@code ZipEntry} for the base entry is returned, otherwise
483 * {@code null} is returned if no entries are found. The initial value for
484 * the version {@code n} is the maximum version as returned by the method
485 * {@link JarFile#getVersion()}.
486 *
487 * @param name the jar file entry name
488 * @return the {@code ZipEntry} for the given entry name or
489 * the versioned entry name or {@code null} if not found
490 *
491 * @throws IllegalStateException
492 * may be thrown if the jar file has been closed
493 *
494 * @see java.util.zip.ZipEntry
495 *
496 * @implSpec
497 * <div class="block">
498 * This implementation may return a versioned entry for the requested name
499 * even if there is not a corresponding base entry. This can occur
500 * if there is a private or package-private versioned entry that matches.
501 * If a subclass overrides this method, assure that the override method
502 * invokes {@code super.getEntry(name)} to obtain all versioned entries.
503 * </div>
504 */
505 public ZipEntry getEntry(String name) {
506 JarFileEntry je = getEntry0(name);
507 if (isMultiRelease()) {
508 return getVersionedEntry(name, je);
509 }
510 return je;
511 }
512
513 /**
514 * Returns an enumeration of the jar file entries.
515 *
516 * @return an enumeration of the jar file entries
517 * @throws IllegalStateException
518 * may be thrown if the jar file has been closed
519 */
520 public Enumeration<JarEntry> entries() {
521 return JUZFA.entries(this, JarFileEntry::new);
522 }
523
524 /**
525 * Returns an ordered {@code Stream} over the jar file entries.
526 * Entries appear in the {@code Stream} in the order they appear in
527 * the central directory of the jar file.
528 *
529 * @return an ordered {@code Stream} of entries in this jar file
530 * @throws IllegalStateException if the jar file has been closed
531 * @since 1.8
532 */
533 public Stream<JarEntry> stream() {
534 return JUZFA.stream(this, JarFileEntry::new);
535 }
536
537 /**
538 * Returns a {@code Stream} of the versioned jar file entries.
539 *
540 * <p>If this {@code JarFile} is a multi-release jar file and is configured to
541 * be processed as such, then an entry in the stream is the latest versioned entry
542 * associated with the corresponding base entry name. The maximum version of the
543 * latest versioned entry is the version returned by {@link #getVersion()}.
544 * The returned stream may include an entry that only exists as a versioned entry.
545 *
546 * If the jar file is not a multi-release jar file or the {@code JarFile} is not
547 * configured for processing a multi-release jar file, this method returns the
548 * same stream that {@link #stream()} returns.
549 *
550 * @return stream of versioned entries
551 * @since 10
552 */
553 public Stream<JarEntry> versionedStream() {
554
555 if (isMultiRelease()) {
556 return JUZFA.entryNameStream(this).map(this::getBasename)
557 .filter(Objects::nonNull)
558 .distinct()
559 .map(this::getJarEntry);
560 }
561 return stream();
562 }
563
564 /*
565 * Invokes {@ZipFile}'s getEntry to Return a {@code JarFileEntry} for the
566 * given entry name or {@code null} if not found.
567 */
568 private JarFileEntry getEntry0(String name) {
569 // Not using a lambda/method reference here to optimize startup time
570 Function<String, JarEntry> newJarFileEntryFn = new Function<>() {
571 @Override
572 public JarEntry apply(String name) {
573 return new JarFileEntry(name);
574 }
575 };
576 return (JarFileEntry)JUZFA.getEntry(this, name, newJarFileEntryFn);
577 }
578
579 private String getBasename(String name) {
580 if (name.startsWith(META_INF_VERSIONS)) {
581 int off = META_INF_VERSIONS.length();
582 int index = name.indexOf('/', off);
583 try {
584 // filter out dir META-INF/versions/ and META-INF/versions/*/
585 // and any entry with version > 'version'
586 if (index == -1 || index == (name.length() - 1) ||
587 Integer.parseInt(name, off, index, 10) > versionFeature) {
588 return null;
589 }
590 } catch (NumberFormatException x) {
591 return null; // remove malformed entries silently
592 }
593 // map to its base name
594 return name.substring(index + 1);
595 }
596 return name;
597 }
598
599 private JarEntry getVersionedEntry(String name, JarEntry je) {
600 if (BASE_VERSION_FEATURE < versionFeature) {
601 if (!name.startsWith(META_INF)) {
602 // search for versioned entry
603 int v = versionFeature;
604 while (v > BASE_VERSION_FEATURE) {
605 JarFileEntry vje = getEntry0(META_INF_VERSIONS + v + "/" + name);
606 if (vje != null) {
607 return vje.withBasename(name);
608 }
609 v--;
610 }
611 }
612 }
613 return je;
614 }
615
616 // placeholder for now
617 String getRealName(JarEntry entry) {
618 return entry.getRealName();
619 }
620
621 private class JarFileEntry extends JarEntry {
622 private String basename;
623
624 JarFileEntry(String name) {
625 super(name);
626 this.basename = name;
627 }
628
629 JarFileEntry(String name, ZipEntry vze) {
630 super(vze);
631 this.basename = name;
632 }
633
634 @Override
635 public Attributes getAttributes() throws IOException {
636 Manifest man = JarFile.this.getManifest();
637 if (man != null) {
638 return man.getAttributes(super.getName());
639 } else {
640 return null;
641 }
642 }
643
644 @Override
645 public Certificate[] getCertificates() {
646 try {
647 maybeInstantiateVerifier();
648 } catch (IOException e) {
649 throw new RuntimeException(e);
650 }
651 if (certs == null && jv != null) {
652 certs = jv.getCerts(JarFile.this, realEntry());
653 }
654 return certs == null ? null : certs.clone();
655 }
656
657 @Override
658 public CodeSigner[] getCodeSigners() {
659 try {
660 maybeInstantiateVerifier();
661 } catch (IOException e) {
662 throw new RuntimeException(e);
663 }
664 if (signers == null && jv != null) {
665 signers = jv.getCodeSigners(JarFile.this, realEntry());
666 }
667 return signers == null ? null : signers.clone();
668 }
669
670 @Override
671 public String getRealName() {
672 return super.getName();
673 }
674
675 @Override
676 public String getName() {
677 return basename;
678 }
679
680 JarFileEntry realEntry() {
681 if (isMultiRelease() && versionFeature != BASE_VERSION_FEATURE) {
682 String entryName = super.getName();
683 return entryName == basename || entryName.equals(basename) ?
684 this : new JarFileEntry(entryName, this);
685 }
686 return this;
687 }
688
689 // changes the basename, returns "this"
690 JarFileEntry withBasename(String name) {
691 basename = name;
692 return this;
693 }
694 }
695
696 /*
697 * Ensures that the JarVerifier has been created if one is
698 * necessary (i.e., the jar appears to be signed.) This is done as
699 * a quick check to avoid processing of the manifest for unsigned
700 * jars.
701 */
702 private void maybeInstantiateVerifier() throws IOException {
703 if (jv != null) {
704 return;
705 }
706
707 if (verify) {
708 String[] names = getMetaInfEntryNames();
709 if (names != null) {
710 for (String nameLower : names) {
711 String name = nameLower.toUpperCase(Locale.ENGLISH);
712 if (name.endsWith(".DSA") ||
713 name.endsWith(".RSA") ||
714 name.endsWith(".EC") ||
715 name.endsWith(".SF")) {
716 // Assume since we found a signature-related file
717 // that the jar is signed and that we therefore
718 // need a JarVerifier and Manifest
719 getManifest();
720 return;
721 }
722 }
723 }
724 // No signature-related files; don't instantiate a
725 // verifier
726 verify = false;
727 }
728 }
729
730 /*
731 * Initializes the verifier object by reading all the manifest
732 * entries and passing them to the verifier.
733 */
734 private void initializeVerifier() {
735 ManifestEntryVerifier mev = null;
736
737 // Verify "META-INF/" entries...
738 try {
739 String[] names = getMetaInfEntryNames();
740 if (names != null) {
741 for (String name : names) {
742 String uname = name.toUpperCase(Locale.ENGLISH);
743 if (MANIFEST_NAME.equals(uname)
744 || SignatureFileVerifier.isBlockOrSF(uname)) {
745 JarEntry e = getJarEntry(name);
746 if (e == null) {
747 throw new JarException("corrupted jar file");
748 }
749 if (mev == null) {
750 mev = new ManifestEntryVerifier
751 (getManifestFromReference());
752 }
753 byte[] b = getBytes(e);
754 if (b != null && b.length > 0) {
755 jv.beginEntry(e, mev);
756 jv.update(b.length, b, 0, b.length, mev);
757 jv.update(-1, null, 0, 0, mev);
758 }
759 }
760 }
761 }
762 } catch (IOException ex) {
763 // if we had an error parsing any blocks, just
764 // treat the jar file as being unsigned
765 jv = null;
766 verify = false;
767 if (JarVerifier.debug != null) {
768 JarVerifier.debug.println("jarfile parsing error!");
769 ex.printStackTrace();
770 }
771 }
772
773 // if after initializing the verifier we have nothing
774 // signed, we null it out.
775
776 if (jv != null) {
777
778 jv.doneWithMeta();
779 if (JarVerifier.debug != null) {
780 JarVerifier.debug.println("done with meta!");
781 }
782
783 if (jv.nothingToVerify()) {
784 if (JarVerifier.debug != null) {
785 JarVerifier.debug.println("nothing to verify!");
786 }
787 jv = null;
788 verify = false;
789 }
790 }
791 }
792
793 /*
794 * Reads all the bytes for a given entry. Used to process the
795 * META-INF files.
796 */
797 private byte[] getBytes(ZipEntry ze) throws IOException {
798 try (InputStream is = super.getInputStream(ze)) {
799 int len = (int)ze.getSize();
800 int bytesRead;
801 byte[] b;
802 // trust specified entry sizes when reasonably small
803 if (len != -1 && len <= 65535) {
804 b = new byte[len];
805 bytesRead = is.readNBytes(b, 0, len);
806 } else {
807 b = is.readAllBytes();
808 bytesRead = b.length;
809 }
810 if (len != -1 && len != bytesRead) {
811 throw new EOFException("Expected:" + len + ", read:" + bytesRead);
812 }
813 return b;
814 }
815 }
816
817 /**
818 * Returns an input stream for reading the contents of the specified
819 * zip file entry.
820 * @param ze the zip file entry
821 * @return an input stream for reading the contents of the specified
822 * zip file entry
823 * @throws ZipException if a zip file format error has occurred
824 * @throws IOException if an I/O error has occurred
825 * @throws SecurityException if any of the jar file entries
826 * are incorrectly signed.
827 * @throws IllegalStateException
828 * may be thrown if the jar file has been closed
829 */
830 public synchronized InputStream getInputStream(ZipEntry ze)
831 throws IOException
832 {
833 maybeInstantiateVerifier();
834 if (jv == null) {
835 return super.getInputStream(ze);
836 }
837 if (!jvInitialized) {
838 initializeVerifier();
839 jvInitialized = true;
840 // could be set to null after a call to
841 // initializeVerifier if we have nothing to
842 // verify
843 if (jv == null)
844 return super.getInputStream(ze);
845 }
846
847 // wrap a verifier stream around the real stream
848 return new JarVerifier.VerifierStream(
849 getManifestFromReference(),
850 verifiableEntry(ze),
851 super.getInputStream(ze),
852 jv);
853 }
854
855 private JarEntry verifiableEntry(ZipEntry ze) {
856 if (ze instanceof JarFileEntry) {
857 // assure the name and entry match for verification
858 return ((JarFileEntry)ze).realEntry();
859 }
860 ze = getJarEntry(ze.getName());
861 if (ze instanceof JarFileEntry) {
862 return ((JarFileEntry)ze).realEntry();
863 }
864 return (JarEntry)ze;
865 }
866
867 // Statics for hand-coded Boyer-Moore search
868 private static final byte[] CLASSPATH_CHARS =
869 {'C','L','A','S','S','-','P','A','T','H', ':', ' '};
870
871 // The bad character shift for "class-path: "
872 private static final byte[] CLASSPATH_LASTOCC;
873
874 // The good suffix shift for "class-path: "
875 private static final byte[] CLASSPATH_OPTOSFT;
876
877 private static final byte[] MULTIRELEASE_CHARS =
878 {'M','U','L','T','I','-','R','E','L','E', 'A', 'S', 'E', ':',
879 ' ', 'T', 'R', 'U', 'E'};
880
881 // The bad character shift for "multi-release: true"
882 private static final byte[] MULTIRELEASE_LASTOCC;
883
884 // The good suffix shift for "multi-release: true"
885 private static final byte[] MULTIRELEASE_OPTOSFT;
886
887 static {
888 CLASSPATH_LASTOCC = new byte[65];
889 CLASSPATH_OPTOSFT = new byte[12];
890 CLASSPATH_LASTOCC[(int)'C' - 32] = 1;
891 CLASSPATH_LASTOCC[(int)'L' - 32] = 2;
892 CLASSPATH_LASTOCC[(int)'S' - 32] = 5;
893 CLASSPATH_LASTOCC[(int)'-' - 32] = 6;
894 CLASSPATH_LASTOCC[(int)'P' - 32] = 7;
895 CLASSPATH_LASTOCC[(int)'A' - 32] = 8;
896 CLASSPATH_LASTOCC[(int)'T' - 32] = 9;
897 CLASSPATH_LASTOCC[(int)'H' - 32] = 10;
898 CLASSPATH_LASTOCC[(int)':' - 32] = 11;
899 CLASSPATH_LASTOCC[(int)' ' - 32] = 12;
900 for (int i = 0; i < 11; i++) {
901 CLASSPATH_OPTOSFT[i] = 12;
902 }
903 CLASSPATH_OPTOSFT[11] = 1;
904
905 MULTIRELEASE_LASTOCC = new byte[65];
906 MULTIRELEASE_OPTOSFT = new byte[19];
907 MULTIRELEASE_LASTOCC[(int)'M' - 32] = 1;
908 MULTIRELEASE_LASTOCC[(int)'I' - 32] = 5;
909 MULTIRELEASE_LASTOCC[(int)'-' - 32] = 6;
910 MULTIRELEASE_LASTOCC[(int)'L' - 32] = 9;
911 MULTIRELEASE_LASTOCC[(int)'A' - 32] = 11;
912 MULTIRELEASE_LASTOCC[(int)'S' - 32] = 12;
913 MULTIRELEASE_LASTOCC[(int)':' - 32] = 14;
914 MULTIRELEASE_LASTOCC[(int)' ' - 32] = 15;
915 MULTIRELEASE_LASTOCC[(int)'T' - 32] = 16;
916 MULTIRELEASE_LASTOCC[(int)'R' - 32] = 17;
917 MULTIRELEASE_LASTOCC[(int)'U' - 32] = 18;
918 MULTIRELEASE_LASTOCC[(int)'E' - 32] = 19;
919 for (int i = 0; i < 17; i++) {
920 MULTIRELEASE_OPTOSFT[i] = 19;
921 }
922 MULTIRELEASE_OPTOSFT[17] = 6;
923 MULTIRELEASE_OPTOSFT[18] = 1;
924 }
925
926 private JarEntry getManEntry() {
927 if (manEntry == null) {
928 // First look up manifest entry using standard name
929 JarEntry manEntry = getEntry0(MANIFEST_NAME);
930 if (manEntry == null) {
931 // If not found, then iterate through all the "META-INF/"
932 // entries to find a match.
933 String[] names = getMetaInfEntryNames();
934 if (names != null) {
935 for (String name : names) {
936 if (MANIFEST_NAME.equals(name.toUpperCase(Locale.ENGLISH))) {
937 manEntry = getEntry0(name);
938 break;
939 }
940 }
941 }
942 }
943 this.manEntry = manEntry;
944 }
945 return manEntry;
946 }
947
948 /**
949 * Returns {@code true} iff this JAR file has a manifest with the
950 * Class-Path attribute
951 */
952 boolean hasClassPathAttribute() throws IOException {
953 checkForSpecialAttributes();
954 return hasClassPathAttribute;
955 }
956
957 /**
958 * Returns true if the pattern {@code src} is found in {@code b}.
959 * The {@code lastOcc} array is the precomputed bad character shifts.
960 * Since there are no repeated substring in our search strings,
961 * the good suffix shifts can be replaced with a comparison.
962 */
963 private int match(byte[] src, byte[] b, byte[] lastOcc, byte[] optoSft) {
964 int len = src.length;
965 int last = b.length - len;
966 int i = 0;
967 next:
968 while (i <= last) {
969 for (int j = (len - 1); j >= 0; j--) {
970 byte c = b[i + j];
971 if (c >= ' ' && c <= 'z') {
972 if (c >= 'a') c -= 32; // Canonicalize
973
974 if (c != src[j]) {
975 // no match
976 int badShift = lastOcc[c - 32];
977 i += Math.max(j + 1 - badShift, optoSft[j]);
978 continue next;
979 }
980 } else {
981 // no match, character not valid for name
982 i += len;
983 continue next;
984 }
985 }
986 return i;
987 }
988 return -1;
989 }
990
991 /**
992 * On first invocation, check if the JAR file has the Class-Path
993 * and the Multi-Release attribute. A no-op on subsequent calls.
994 */
995 private void checkForSpecialAttributes() throws IOException {
996 if (hasCheckedSpecialAttributes) {
997 return;
998 }
999 synchronized (this) {
1000 if (hasCheckedSpecialAttributes) {
1001 return;
1002 }
1003 JarEntry manEntry = getManEntry();
1004 if (manEntry != null) {
1005 byte[] b = getBytes(manEntry);
1006 hasClassPathAttribute = match(CLASSPATH_CHARS, b,
1007 CLASSPATH_LASTOCC, CLASSPATH_OPTOSFT) != -1;
1008 // is this a multi-release jar file
1009 if (MULTI_RELEASE_ENABLED) {
1010 int i = match(MULTIRELEASE_CHARS, b, MULTIRELEASE_LASTOCC,
1011 MULTIRELEASE_OPTOSFT);
1012 if (i != -1) {
1013 // Read the main attributes of the manifest
1014 byte[] lbuf = new byte[512];
1015 Attributes attr = new Attributes();
1016 attr.read(new Manifest.FastInputStream(
1017 new ByteArrayInputStream(b)), lbuf);
1018 isMultiRelease = Boolean.parseBoolean(
1019 attr.getValue(Attributes.Name.MULTI_RELEASE));
1020 }
1021 }
1022 }
1023 hasCheckedSpecialAttributes = true;
1024 }
1025 }
1026
1027 synchronized void ensureInitialization() {
1028 try {
1029 maybeInstantiateVerifier();
1030 } catch (IOException e) {
1031 throw new RuntimeException(e);
1032 }
1033 if (jv != null && !jvInitialized) {
1034 initializeVerifier();
1035 jvInitialized = true;
1036 }
1037 }
1038
1039 /*
1040 * Returns a versioned {@code JarFileEntry} for the given entry,
1041 * if there is one. Otherwise returns the original entry. This
1042 * is invoked by the {@code entries2} for verifier.
1043 */
1044 JarEntry newEntry(JarEntry je) {
1045 if (isMultiRelease()) {
1046 return getVersionedEntry(je.getName(), je);
1047 }
1048 return je;
1049 }
1050
1051 /*
1052 * Returns a versioned {@code JarFileEntry} for the given entry
1053 * name, if there is one. Otherwise returns a {@code JarFileEntry}
1054 * with the given name. It is invoked from JarVerifier's entries2
1055 * for {@code singers}.
1056 */
1057 JarEntry newEntry(String name) {
1058 if (isMultiRelease()) {
1059 JarEntry vje = getVersionedEntry(name, (JarEntry)null);
1060 if (vje != null) {
1061 return vje;
1062 }
1063 }
1064 return new JarFileEntry(name);
1065 }
1066
1067 Enumeration<String> entryNames(CodeSource[] cs) {
1068 ensureInitialization();
1069 if (jv != null) {
1070 return jv.entryNames(this, cs);
1071 }
1072
1073 /*
1074 * JAR file has no signed content. Is there a non-signing
1075 * code source?
1076 */
1077 boolean includeUnsigned = false;
1078 for (CodeSource c : cs) {
1079 if (c.getCodeSigners() == null) {
1080 includeUnsigned = true;
1081 break;
1082 }
1083 }
1084 if (includeUnsigned) {
1085 return unsignedEntryNames();
1086 } else {
1087 return Collections.emptyEnumeration();
1088 }
1089 }
1090
1091 /**
1092 * Returns an enumeration of the zip file entries
1093 * excluding internal JAR mechanism entries and including
1094 * signed entries missing from the ZIP directory.
1095 */
1096 Enumeration<JarEntry> entries2() {
1097 ensureInitialization();
1098 if (jv != null) {
1099 return jv.entries2(this, JUZFA.entries(JarFile.this,
1100 JarFileEntry::new));
1101 }
1102
1103 // screen out entries which are never signed
1104 final var unfilteredEntries = JUZFA.entries(JarFile.this, JarFileEntry::new);
1105
1106 return new Enumeration<>() {
1107
1108 JarEntry entry;
1109
1110 public boolean hasMoreElements() {
1111 if (entry != null) {
1112 return true;
1113 }
1114 while (unfilteredEntries.hasMoreElements()) {
1115 JarEntry je = unfilteredEntries.nextElement();
1116 if (JarVerifier.isSigningRelated(je.getName())) {
1117 continue;
1118 }
1119 entry = je;
1120 return true;
1121 }
1122 return false;
1123 }
1124
1125 public JarEntry nextElement() {
1126 if (hasMoreElements()) {
1127 JarEntry je = entry;
1128 entry = null;
1129 return newEntry(je);
1130 }
1131 throw new NoSuchElementException();
1132 }
1133 };
1134 }
1135
1136 CodeSource[] getCodeSources(URL url) {
1137 ensureInitialization();
1138 if (jv != null) {
1139 return jv.getCodeSources(this, url);
1140 }
1141
1142 /*
1143 * JAR file has no signed content. Is there a non-signing
1144 * code source?
1145 */
1146 Enumeration<String> unsigned = unsignedEntryNames();
1147 if (unsigned.hasMoreElements()) {
1148 return new CodeSource[]{JarVerifier.getUnsignedCS(url)};
1149 } else {
1150 return null;
1151 }
1152 }
1153
1154 private Enumeration<String> unsignedEntryNames() {
1155 final Enumeration<JarEntry> entries = entries();
1156 return new Enumeration<>() {
1157
1158 String name;
1159
1160 /*
1161 * Grab entries from ZIP directory but screen out
1162 * metadata.
1163 */
1164 public boolean hasMoreElements() {
1165 if (name != null) {
1166 return true;
1167 }
1168 while (entries.hasMoreElements()) {
1169 String value;
1170 ZipEntry e = entries.nextElement();
1171 value = e.getName();
1172 if (e.isDirectory() || JarVerifier.isSigningRelated(value)) {
1173 continue;
1174 }
1175 name = value;
1176 return true;
1177 }
1178 return false;
1179 }
1180
1181 public String nextElement() {
1182 if (hasMoreElements()) {
1183 String value = name;
1184 name = null;
1185 return value;
1186 }
1187 throw new NoSuchElementException();
1188 }
1189 };
1190 }
1191
1192 CodeSource getCodeSource(URL url, String name) {
1193 ensureInitialization();
1194 if (jv != null) {
1195 if (jv.eagerValidation) {
1196 CodeSource cs = null;
1197 JarEntry je = getJarEntry(name);
1198 if (je != null) {
1199 cs = jv.getCodeSource(url, this, je);
1200 } else {
1201 cs = jv.getCodeSource(url, name);
1202 }
1203 return cs;
1204 } else {
1205 return jv.getCodeSource(url, name);
1206 }
1207 }
1208
1209 return JarVerifier.getUnsignedCS(url);
1210 }
1211
1212 void setEagerValidation(boolean eager) {
1213 try {
1214 maybeInstantiateVerifier();
1215 } catch (IOException e) {
1216 throw new RuntimeException(e);
1217 }
1218 if (jv != null) {
1219 jv.setEagerValidation(eager);
1220 }
1221 }
1222
1223 List<Object> getManifestDigests() {
1224 ensureInitialization();
1225 if (jv != null) {
1226 return jv.getManifestDigests();
1227 }
1228 return new ArrayList<>();
1229 }
1230 }
1231