1 /*
2 * Copyright (c) 2009, 2020, 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 jdk.nio.zipfs;
27
28 import java.io.BufferedOutputStream;
29 import java.io.ByteArrayInputStream;
30 import java.io.ByteArrayOutputStream;
31 import java.io.EOFException;
32 import java.io.FilterOutputStream;
33 import java.io.IOException;
34 import java.io.InputStream;
35 import java.io.OutputStream;
36 import java.lang.Runtime.Version;
37 import java.nio.ByteBuffer;
38 import java.nio.MappedByteBuffer;
39 import java.nio.channels.FileChannel;
40 import java.nio.channels.FileLock;
41 import java.nio.channels.ReadableByteChannel;
42 import java.nio.channels.SeekableByteChannel;
43 import java.nio.channels.WritableByteChannel;
44 import java.nio.file.*;
45 import java.nio.file.attribute.*;
46 import java.nio.file.spi.FileSystemProvider;
47 import java.security.AccessController;
48 import java.security.PrivilegedAction;
49 import java.security.PrivilegedActionException;
50 import java.security.PrivilegedExceptionAction;
51 import java.util.*;
52 import java.util.concurrent.locks.ReadWriteLock;
53 import java.util.concurrent.locks.ReentrantReadWriteLock;
54 import java.util.function.Consumer;
55 import java.util.function.Function;
56 import java.util.jar.Attributes;
57 import java.util.jar.Manifest;
58 import java.util.regex.Pattern;
59 import java.util.zip.CRC32;
60 import java.util.zip.Deflater;
61 import java.util.zip.DeflaterOutputStream;
62 import java.util.zip.Inflater;
63 import java.util.zip.InflaterInputStream;
64 import java.util.zip.ZipException;
65
66 import static java.lang.Boolean.TRUE;
67 import static java.nio.file.StandardCopyOption.COPY_ATTRIBUTES;
68 import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
69 import static java.nio.file.StandardOpenOption.APPEND;
70 import static java.nio.file.StandardOpenOption.CREATE;
71 import static java.nio.file.StandardOpenOption.CREATE_NEW;
72 import static java.nio.file.StandardOpenOption.READ;
73 import static java.nio.file.StandardOpenOption.TRUNCATE_EXISTING;
74 import static java.nio.file.StandardOpenOption.WRITE;
75 import static jdk.nio.zipfs.ZipConstants.*;
76 import static jdk.nio.zipfs.ZipUtils.*;
77
78 /**
79 * A FileSystem built on a zip file
80 *
81 * @author Xueming Shen
82 */
83 class ZipFileSystem extends FileSystem {
84 // statics
85 private static final boolean isWindows = AccessController.doPrivileged(
86 (PrivilegedAction<Boolean>)()->System.getProperty("os.name")
87 .startsWith("Windows"));
88 private static final byte[] ROOTPATH = new byte[] { '/' };
89 private static final String PROPERTY_POSIX = "enablePosixFileAttributes";
90 private static final String PROPERTY_DEFAULT_OWNER = "defaultOwner";
91 private static final String PROPERTY_DEFAULT_GROUP = "defaultGroup";
92 private static final String PROPERTY_DEFAULT_PERMISSIONS = "defaultPermissions";
93 // Property used to specify the entry version to use for a multi-release JAR
94 private static final String PROPERTY_RELEASE_VERSION = "releaseVersion";
95 // Original property used to specify the entry version to use for a
96 // multi-release JAR which is kept for backwards compatibility.
97 private static final String PROPERTY_MULTI_RELEASE = "multi-release";
98
99 private static final Set<PosixFilePermission> DEFAULT_PERMISSIONS =
100 PosixFilePermissions.fromString("rwxrwxrwx");
101 // Property used to specify the compression mode to use
102 private static final String PROPERTY_COMPRESSION_METHOD = "compressionMethod";
103 // Value specified for compressionMethod property to compress Zip entries
104 private static final String COMPRESSION_METHOD_DEFLATED = "DEFLATED";
105 // Value specified for compressionMethod property to not compress Zip entries
106 private static final String COMPRESSION_METHOD_STORED = "STORED";
107
108 private final ZipFileSystemProvider provider;
109 private final Path zfpath;
110 final ZipCoder zc;
111 private final ZipPath rootdir;
112 private boolean readOnly; // readonly file system, false by default
113
114 // default time stamp for pseudo entries
115 private final long zfsDefaultTimeStamp = System.currentTimeMillis();
116
117 // configurable by env map
118 private final boolean noExtt; // see readExtra()
119 private final boolean useTempFile; // use a temp file for newOS, default
120 // is to use BAOS for better performance
121 private final boolean forceEnd64;
122 private final int defaultCompressionMethod; // METHOD_STORED if "noCompression=true"
123 // METHOD_DEFLATED otherwise
124
125 // entryLookup is identity by default, will be overridden for multi-release jars
126 private Function<byte[], byte[]> entryLookup = Function.identity();
127
128 // POSIX support
129 final boolean supportPosix;
130 private final UserPrincipal defaultOwner;
131 private final GroupPrincipal defaultGroup;
132 private final Set<PosixFilePermission> defaultPermissions;
133
134 private final Set<String> supportedFileAttributeViews;
135
136 ZipFileSystem(ZipFileSystemProvider provider,
137 Path zfpath,
138 Map<String, ?> env) throws IOException
139 {
140 // default encoding for name/comment
141 String nameEncoding = env.containsKey("encoding") ?
142 (String)env.get("encoding") : "UTF-8";
143 this.noExtt = "false".equals(env.get("zipinfo-time"));
144 this.useTempFile = isTrue(env, "useTempFile");
145 this.forceEnd64 = isTrue(env, "forceZIP64End");
146 this.defaultCompressionMethod = getDefaultCompressionMethod(env);
147 this.supportPosix = isTrue(env, PROPERTY_POSIX);
148 this.defaultOwner = initOwner(zfpath, env);
149 this.defaultGroup = initGroup(zfpath, env);
150 this.defaultPermissions = initPermissions(env);
151 this.supportedFileAttributeViews = supportPosix ?
152 Set.of("basic", "posix", "zip") : Set.of("basic", "zip");
153 if (Files.notExists(zfpath)) {
154 // create a new zip if it doesn't exist
155 if (isTrue(env, "create")) {
156 try (OutputStream os = Files.newOutputStream(zfpath, CREATE_NEW, WRITE)) {
157 new END().write(os, 0, forceEnd64);
158 }
159 } else {
160 throw new NoSuchFileException(zfpath.toString());
161 }
162 }
163 // sm and existence check
164 zfpath.getFileSystem().provider().checkAccess(zfpath, AccessMode.READ);
165 boolean writeable = AccessController.doPrivileged(
166 (PrivilegedAction<Boolean>)()->Files.isWritable(zfpath));
167 this.readOnly = !writeable;
168 this.zc = ZipCoder.get(nameEncoding);
169 this.rootdir = new ZipPath(this, new byte[]{'/'});
170 this.ch = Files.newByteChannel(zfpath, READ);
171 try {
172 this.cen = initCEN();
173 } catch (IOException x) {
174 try {
175 this.ch.close();
176 } catch (IOException xx) {
177 x.addSuppressed(xx);
178 }
179 throw x;
180 }
181 this.provider = provider;
182 this.zfpath = zfpath;
183
184 initializeReleaseVersion(env);
185 }
186
187 /**
188 * Return the compression method to use (STORED or DEFLATED). If the
189 * property {@code commpressionMethod} is set use its value to determine
190 * the compression method to use. If the property is not set, then the
191 * default compression is DEFLATED unless the property {@code noCompression}
192 * is set which is supported for backwards compatibility.
193 * @param env Zip FS map of properties
194 * @return The Compression method to use
195 */
196 private int getDefaultCompressionMethod(Map<String, ?> env) {
197 int result =
198 isTrue(env, "noCompression") ? METHOD_STORED : METHOD_DEFLATED;
199 if (env.containsKey(PROPERTY_COMPRESSION_METHOD)) {
200 Object compressionMethod = env.get(PROPERTY_COMPRESSION_METHOD);
201 if (compressionMethod != null) {
202 if (compressionMethod instanceof String) {
203 switch (((String) compressionMethod).toUpperCase()) {
204 case COMPRESSION_METHOD_STORED:
205 result = METHOD_STORED;
206 break;
207 case COMPRESSION_METHOD_DEFLATED:
208 result = METHOD_DEFLATED;
209 break;
210 default:
211 throw new IllegalArgumentException(String.format(
212 "The value for the %s property must be %s or %s",
213 PROPERTY_COMPRESSION_METHOD, COMPRESSION_METHOD_STORED,
214 COMPRESSION_METHOD_DEFLATED));
215 }
216 } else {
217 throw new IllegalArgumentException(String.format(
218 "The Object type for the %s property must be a String",
219 PROPERTY_COMPRESSION_METHOD));
220 }
221 } else {
222 throw new IllegalArgumentException(String.format(
223 "The value for the %s property must be %s or %s",
224 PROPERTY_COMPRESSION_METHOD, COMPRESSION_METHOD_STORED,
225 COMPRESSION_METHOD_DEFLATED));
226 }
227 }
228 return result;
229 }
230
231 // returns true if there is a name=true/"true" setting in env
232 private static boolean isTrue(Map<String, ?> env, String name) {
233 return "true".equals(env.get(name)) || TRUE.equals(env.get(name));
234 }
235
236 // Initialize the default owner for files inside the zip archive.
237 // If not specified in env, it is the owner of the archive. If no owner can
238 // be determined, we try to go with system property "user.name". If that's not
239 // accessible, we return "<zipfs_default>".
240 private UserPrincipal initOwner(Path zfpath, Map<String, ?> env) throws IOException {
241 Object o = env.get(PROPERTY_DEFAULT_OWNER);
242 if (o == null) {
243 try {
244 PrivilegedExceptionAction<UserPrincipal> pa = ()->Files.getOwner(zfpath);
245 return AccessController.doPrivileged(pa);
246 } catch (UnsupportedOperationException | PrivilegedActionException e) {
247 if (e instanceof UnsupportedOperationException ||
248 e.getCause() instanceof NoSuchFileException)
249 {
250 PrivilegedAction<String> pa = ()->System.getProperty("user.name");
251 String userName = AccessController.doPrivileged(pa);
252 return ()->userName;
253 } else {
254 throw new IOException(e);
255 }
256 }
257 }
258 if (o instanceof String) {
259 if (((String)o).isEmpty()) {
260 throw new IllegalArgumentException("Value for property " +
261 PROPERTY_DEFAULT_OWNER + " must not be empty.");
262 }
263 return ()->(String)o;
264 }
265 if (o instanceof UserPrincipal) {
266 return (UserPrincipal)o;
267 }
268 throw new IllegalArgumentException("Value for property " +
269 PROPERTY_DEFAULT_OWNER + " must be of type " + String.class +
270 " or " + UserPrincipal.class);
271 }
272
273 // Initialize the default group for files inside the zip archive.
274 // If not specified in env, we try to determine the group of the zip archive itself.
275 // If this is not possible/unsupported, we will return a group principal going by
276 // the same name as the default owner.
277 private GroupPrincipal initGroup(Path zfpath, Map<String, ?> env) throws IOException {
278 Object o = env.get(PROPERTY_DEFAULT_GROUP);
279 if (o == null) {
280 try {
281 PosixFileAttributeView zfpv = Files.getFileAttributeView(zfpath, PosixFileAttributeView.class);
282 if (zfpv == null) {
283 return defaultOwner::getName;
284 }
285 PrivilegedExceptionAction<GroupPrincipal> pa = ()->zfpv.readAttributes().group();
286 return AccessController.doPrivileged(pa);
287 } catch (UnsupportedOperationException | PrivilegedActionException e) {
288 if (e instanceof UnsupportedOperationException ||
289 e.getCause() instanceof NoSuchFileException)
290 {
291 return defaultOwner::getName;
292 } else {
293 throw new IOException(e);
294 }
295 }
296 }
297 if (o instanceof String) {
298 if (((String)o).isEmpty()) {
299 throw new IllegalArgumentException("Value for property " +
300 PROPERTY_DEFAULT_GROUP + " must not be empty.");
301 }
302 return ()->(String)o;
303 }
304 if (o instanceof GroupPrincipal) {
305 return (GroupPrincipal)o;
306 }
307 throw new IllegalArgumentException("Value for property " +
308 PROPERTY_DEFAULT_GROUP + " must be of type " + String.class +
309 " or " + GroupPrincipal.class);
310 }
311
312 // Initialize the default permissions for files inside the zip archive.
313 // If not specified in env, it will return 777.
314 private Set<PosixFilePermission> initPermissions(Map<String, ?> env) {
315 Object o = env.get(PROPERTY_DEFAULT_PERMISSIONS);
316 if (o == null) {
317 return DEFAULT_PERMISSIONS;
318 }
319 if (o instanceof String) {
320 return PosixFilePermissions.fromString((String)o);
321 }
322 if (!(o instanceof Set)) {
323 throw new IllegalArgumentException("Value for property " +
324 PROPERTY_DEFAULT_PERMISSIONS + " must be of type " + String.class +
325 " or " + Set.class);
326 }
327 Set<PosixFilePermission> perms = new HashSet<>();
328 for (Object o2 : (Set<?>)o) {
329 if (o2 instanceof PosixFilePermission) {
330 perms.add((PosixFilePermission)o2);
331 } else {
332 throw new IllegalArgumentException(PROPERTY_DEFAULT_PERMISSIONS +
333 " must only contain objects of type " + PosixFilePermission.class);
334 }
335 }
336 return perms;
337 }
338
339 @Override
340 public FileSystemProvider provider() {
341 return provider;
342 }
343
344 @Override
345 public String getSeparator() {
346 return "/";
347 }
348
349 @Override
350 public boolean isOpen() {
351 return isOpen;
352 }
353
354 @Override
355 public boolean isReadOnly() {
356 return readOnly;
357 }
358
359 private void checkWritable() {
360 if (readOnly) {
361 throw new ReadOnlyFileSystemException();
362 }
363 }
364
365 void setReadOnly() {
366 this.readOnly = true;
367 }
368
369 @Override
370 public Iterable<Path> getRootDirectories() {
371 return List.of(rootdir);
372 }
373
374 ZipPath getRootDir() {
375 return rootdir;
376 }
377
378 @Override
379 public ZipPath getPath(String first, String... more) {
380 if (more.length == 0) {
381 return new ZipPath(this, first);
382 }
383 StringBuilder sb = new StringBuilder();
384 sb.append(first);
385 for (String path : more) {
386 if (path.length() > 0) {
387 if (sb.length() > 0) {
388 sb.append('/');
389 }
390 sb.append(path);
391 }
392 }
393 return new ZipPath(this, sb.toString());
394 }
395
396 @Override
397 public UserPrincipalLookupService getUserPrincipalLookupService() {
398 throw new UnsupportedOperationException();
399 }
400
401 @Override
402 public WatchService newWatchService() {
403 throw new UnsupportedOperationException();
404 }
405
406 FileStore getFileStore(ZipPath path) {
407 return new ZipFileStore(path);
408 }
409
410 @Override
411 public Iterable<FileStore> getFileStores() {
412 return List.of(new ZipFileStore(rootdir));
413 }
414
415 @Override
416 public Set<String> supportedFileAttributeViews() {
417 return supportedFileAttributeViews;
418 }
419
420 @Override
421 public String toString() {
422 return zfpath.toString();
423 }
424
425 Path getZipFile() {
426 return zfpath;
427 }
428
429 private static final String GLOB_SYNTAX = "glob";
430 private static final String REGEX_SYNTAX = "regex";
431
432 @Override
433 public PathMatcher getPathMatcher(String syntaxAndInput) {
434 int pos = syntaxAndInput.indexOf(':');
435 if (pos <= 0 || pos == syntaxAndInput.length()) {
436 throw new IllegalArgumentException();
437 }
438 String syntax = syntaxAndInput.substring(0, pos);
439 String input = syntaxAndInput.substring(pos + 1);
440 String expr;
441 if (syntax.equalsIgnoreCase(GLOB_SYNTAX)) {
442 expr = toRegexPattern(input);
443 } else {
444 if (syntax.equalsIgnoreCase(REGEX_SYNTAX)) {
445 expr = input;
446 } else {
447 throw new UnsupportedOperationException("Syntax '" + syntax +
448 "' not recognized");
449 }
450 }
451 // return matcher
452 final Pattern pattern = Pattern.compile(expr);
453 return (path)->pattern.matcher(path.toString()).matches();
454 }
455
456 @Override
457 public void close() throws IOException {
458 beginWrite();
459 try {
460 if (!isOpen)
461 return;
462 isOpen = false; // set closed
463 } finally {
464 endWrite();
465 }
466 if (!streams.isEmpty()) { // unlock and close all remaining streams
467 Set<InputStream> copy = new HashSet<>(streams);
468 for (InputStream is : copy)
469 is.close();
470 }
471 beginWrite(); // lock and sync
472 try {
473 AccessController.doPrivileged((PrivilegedExceptionAction<Void>)() -> {
474 sync(); return null;
475 });
476 ch.close(); // close the ch just in case no update
477 // and sync didn't close the ch
478 } catch (PrivilegedActionException e) {
479 throw (IOException)e.getException();
480 } finally {
481 endWrite();
482 }
483
484 synchronized (inflaters) {
485 for (Inflater inf : inflaters)
486 inf.end();
487 }
488 synchronized (deflaters) {
489 for (Deflater def : deflaters)
490 def.end();
491 }
492
493 beginWrite(); // lock and sync
494 try {
495 // Clear the map so that its keys & values can be garbage collected
496 inodes = null;
497 } finally {
498 endWrite();
499 }
500
501 IOException ioe = null;
502 synchronized (tmppaths) {
503 for (Path p : tmppaths) {
504 try {
505 AccessController.doPrivileged(
506 (PrivilegedExceptionAction<Boolean>)() -> Files.deleteIfExists(p));
507 } catch (PrivilegedActionException e) {
508 IOException x = (IOException)e.getException();
509 if (ioe == null)
510 ioe = x;
511 else
512 ioe.addSuppressed(x);
513 }
514 }
515 }
516 provider.removeFileSystem(zfpath, this);
517 if (ioe != null)
518 throw ioe;
519 }
520
521 ZipFileAttributes getFileAttributes(byte[] path)
522 throws IOException
523 {
524 beginRead();
525 try {
526 ensureOpen();
527 IndexNode inode = getInode(path);
528 if (inode == null) {
529 return null;
530 } else if (inode instanceof Entry) {
531 return (Entry)inode;
532 } else if (inode.pos == -1) {
533 // pseudo directory, uses METHOD_STORED
534 Entry e = supportPosix ?
535 new PosixEntry(inode.name, inode.isdir, METHOD_STORED) :
536 new Entry(inode.name, inode.isdir, METHOD_STORED);
537 e.mtime = e.atime = e.ctime = zfsDefaultTimeStamp;
538 return e;
539 } else {
540 return supportPosix ? new PosixEntry(this, inode) : new Entry(this, inode);
541 }
542 } finally {
543 endRead();
544 }
545 }
546
547 void checkAccess(byte[] path) throws IOException {
548 beginRead();
549 try {
550 ensureOpen();
551 // is it necessary to readCEN as a sanity check?
552 if (getInode(path) == null) {
553 throw new NoSuchFileException(toString());
554 }
555
556 } finally {
557 endRead();
558 }
559 }
560
561 void setTimes(byte[] path, FileTime mtime, FileTime atime, FileTime ctime)
562 throws IOException
563 {
564 checkWritable();
565 beginWrite();
566 try {
567 ensureOpen();
568 Entry e = getEntry(path); // ensureOpen checked
569 if (e == null)
570 throw new NoSuchFileException(getString(path));
571 if (e.type == Entry.CEN)
572 e.type = Entry.COPY; // copy e
573 if (mtime != null)
574 e.mtime = mtime.toMillis();
575 if (atime != null)
576 e.atime = atime.toMillis();
577 if (ctime != null)
578 e.ctime = ctime.toMillis();
579 update(e);
580 } finally {
581 endWrite();
582 }
583 }
584
585 void setOwner(byte[] path, UserPrincipal owner) throws IOException {
586 checkWritable();
587 beginWrite();
588 try {
589 ensureOpen();
590 Entry e = getEntry(path); // ensureOpen checked
591 if (e == null) {
592 throw new NoSuchFileException(getString(path));
593 }
594 // as the owner information is not persistent, we don't need to
595 // change e.type to Entry.COPY
596 if (e instanceof PosixEntry) {
597 ((PosixEntry)e).owner = owner;
598 update(e);
599 }
600 } finally {
601 endWrite();
602 }
603 }
604
605 void setGroup(byte[] path, GroupPrincipal group) throws IOException {
606 checkWritable();
607 beginWrite();
608 try {
609 ensureOpen();
610 Entry e = getEntry(path); // ensureOpen checked
611 if (e == null) {
612 throw new NoSuchFileException(getString(path));
613 }
614 // as the group information is not persistent, we don't need to
615 // change e.type to Entry.COPY
616 if (e instanceof PosixEntry) {
617 ((PosixEntry)e).group = group;
618 update(e);
619 }
620 } finally {
621 endWrite();
622 }
623 }
624
625 void setPermissions(byte[] path, Set<PosixFilePermission> perms) throws IOException {
626 checkWritable();
627 beginWrite();
628 try {
629 ensureOpen();
630 Entry e = getEntry(path); // ensureOpen checked
631 if (e == null) {
632 throw new NoSuchFileException(getString(path));
633 }
634 if (e.type == Entry.CEN) {
635 e.type = Entry.COPY; // copy e
636 }
637 e.posixPerms = perms == null ? -1 : ZipUtils.permsToFlags(perms);
638 update(e);
639 } finally {
640 endWrite();
641 }
642 }
643
644 boolean exists(byte[] path) {
645 beginRead();
646 try {
647 ensureOpen();
648 return getInode(path) != null;
649 } finally {
650 endRead();
651 }
652 }
653
654 boolean isDirectory(byte[] path) {
655 beginRead();
656 try {
657 IndexNode n = getInode(path);
658 return n != null && n.isDir();
659 } finally {
660 endRead();
661 }
662 }
663
664 // returns the list of child paths of "path"
665 Iterator<Path> iteratorOf(ZipPath dir,
666 DirectoryStream.Filter<? super Path> filter)
667 throws IOException
668 {
669 beginWrite(); // iteration of inodes needs exclusive lock
670 try {
671 ensureOpen();
672 byte[] path = dir.getResolvedPath();
673 IndexNode inode = getInode(path);
674 if (inode == null)
675 throw new NotDirectoryException(getString(path));
676 List<Path> list = new ArrayList<>();
677 IndexNode child = inode.child;
678 while (child != null) {
679 // (1) Assume each path from the zip file itself is "normalized"
680 // (2) IndexNode.name is absolute. see IndexNode(byte[],int,int)
681 // (3) If parent "dir" is relative when ZipDirectoryStream
682 // is created, the returned child path needs to be relative
683 // as well.
684 ZipPath childPath = new ZipPath(this, child.name, true);
685 ZipPath childFileName = childPath.getFileName();
686 ZipPath zpath = dir.resolve(childFileName);
687 if (filter == null || filter.accept(zpath))
688 list.add(zpath);
689 child = child.sibling;
690 }
691 return list.iterator();
692 } finally {
693 endWrite();
694 }
695 }
696
697 void createDirectory(byte[] dir, FileAttribute<?>... attrs) throws IOException {
698 checkWritable();
699 beginWrite();
700 try {
701 ensureOpen();
702 if (dir.length == 0 || exists(dir)) // root dir, or existing dir
703 throw new FileAlreadyExistsException(getString(dir));
704 checkParents(dir);
705 Entry e = supportPosix ?
706 new PosixEntry(dir, Entry.NEW, true, METHOD_STORED, attrs) :
707 new Entry(dir, Entry.NEW, true, METHOD_STORED, attrs);
708 update(e);
709 } finally {
710 endWrite();
711 }
712 }
713
714 void copyFile(boolean deletesrc, byte[]src, byte[] dst, CopyOption... options)
715 throws IOException
716 {
717 checkWritable();
718 if (Arrays.equals(src, dst))
719 return; // do nothing, src and dst are the same
720
721 beginWrite();
722 try {
723 ensureOpen();
724 Entry eSrc = getEntry(src); // ensureOpen checked
725
726 if (eSrc == null)
727 throw new NoSuchFileException(getString(src));
728 if (eSrc.isDir()) { // spec says to create dst dir
729 createDirectory(dst);
730 return;
731 }
732 boolean hasReplace = false;
733 boolean hasCopyAttrs = false;
734 for (CopyOption opt : options) {
735 if (opt == REPLACE_EXISTING)
736 hasReplace = true;
737 else if (opt == COPY_ATTRIBUTES)
738 hasCopyAttrs = true;
739 }
740 Entry eDst = getEntry(dst);
741 if (eDst != null) {
742 if (!hasReplace)
743 throw new FileAlreadyExistsException(getString(dst));
744 } else {
745 checkParents(dst);
746 }
747 // copy eSrc entry and change name
748 Entry u = supportPosix ?
749 new PosixEntry((PosixEntry)eSrc, Entry.COPY) :
750 new Entry(eSrc, Entry.COPY);
751 u.name(dst);
752 if (eSrc.type == Entry.NEW || eSrc.type == Entry.FILECH) {
753 u.type = eSrc.type; // make it the same type
754 if (deletesrc) { // if it's a "rename", take the data
755 u.bytes = eSrc.bytes;
756 u.file = eSrc.file;
757 } else { // if it's not "rename", copy the data
758 if (eSrc.bytes != null)
759 u.bytes = Arrays.copyOf(eSrc.bytes, eSrc.bytes.length);
760 else if (eSrc.file != null) {
761 u.file = getTempPathForEntry(null);
762 Files.copy(eSrc.file, u.file, REPLACE_EXISTING);
763 }
764 }
765 } else if (eSrc.type == Entry.CEN && eSrc.method != defaultCompressionMethod) {
766
767 /**
768 * We are copying a file within the same Zip file using a
769 * different compression method.
770 */
771 try (InputStream in = newInputStream(src);
772 OutputStream out = newOutputStream(dst,
773 CREATE, TRUNCATE_EXISTING, WRITE)) {
774 in.transferTo(out);
775 }
776 u = getEntry(dst);
777 }
778
779 if (!hasCopyAttrs)
780 u.mtime = u.atime= u.ctime = System.currentTimeMillis();
781 update(u);
782 if (deletesrc)
783 updateDelete(eSrc);
784 } finally {
785 endWrite();
786 }
787 }
788
789 // Returns an output stream for writing the contents into the specified
790 // entry.
791 OutputStream newOutputStream(byte[] path, OpenOption... options)
792 throws IOException
793 {
794 checkWritable();
795 boolean hasCreateNew = false;
796 boolean hasCreate = false;
797 boolean hasAppend = false;
798 boolean hasTruncate = false;
799 for (OpenOption opt : options) {
800 if (opt == READ)
801 throw new IllegalArgumentException("READ not allowed");
802 if (opt == CREATE_NEW)
803 hasCreateNew = true;
804 if (opt == CREATE)
805 hasCreate = true;
806 if (opt == APPEND)
807 hasAppend = true;
808 if (opt == TRUNCATE_EXISTING)
809 hasTruncate = true;
810 }
811 if (hasAppend && hasTruncate)
812 throw new IllegalArgumentException("APPEND + TRUNCATE_EXISTING not allowed");
813 beginRead(); // only need a readlock, the "update()" will
814 try { // try to obtain a writelock when the os is
815 ensureOpen(); // being closed.
816 Entry e = getEntry(path);
817 if (e != null) {
818 if (e.isDir() || hasCreateNew)
819 throw new FileAlreadyExistsException(getString(path));
820 if (hasAppend) {
821 OutputStream os = getOutputStream(new Entry(e, Entry.NEW));
822 try (InputStream is = getInputStream(e)) {
823 is.transferTo(os);
824 }
825 return os;
826 }
827 return getOutputStream(supportPosix ?
828 new PosixEntry((PosixEntry)e, Entry.NEW, defaultCompressionMethod)
829 : new Entry(e, Entry.NEW, defaultCompressionMethod));
830 } else {
831 if (!hasCreate && !hasCreateNew)
832 throw new NoSuchFileException(getString(path));
833 checkParents(path);
834 return getOutputStream(supportPosix ?
835 new PosixEntry(path, Entry.NEW, false, defaultCompressionMethod) :
836 new Entry(path, Entry.NEW, false, defaultCompressionMethod));
837 }
838 } finally {
839 endRead();
840 }
841 }
842
843 // Returns an input stream for reading the contents of the specified
844 // file entry.
845 InputStream newInputStream(byte[] path) throws IOException {
846 beginRead();
847 try {
848 ensureOpen();
849 Entry e = getEntry(path);
850 if (e == null)
851 throw new NoSuchFileException(getString(path));
852 if (e.isDir())
853 throw new FileSystemException(getString(path), "is a directory", null);
854 return getInputStream(e);
855 } finally {
856 endRead();
857 }
858 }
859
860 private void checkOptions(Set<? extends OpenOption> options) {
861 // check for options of null type and option is an intance of StandardOpenOption
862 for (OpenOption option : options) {
863 if (option == null)
864 throw new NullPointerException();
865 if (!(option instanceof StandardOpenOption))
866 throw new IllegalArgumentException();
867 }
868 if (options.contains(APPEND) && options.contains(TRUNCATE_EXISTING))
869 throw new IllegalArgumentException("APPEND + TRUNCATE_EXISTING not allowed");
870 }
871
872 // Returns an output SeekableByteChannel for either
873 // (1) writing the contents of a new entry, if the entry doesn't exist, or
874 // (2) updating/replacing the contents of an existing entry.
875 // Note: The content of the channel is not compressed until the
876 // channel is closed
877 private class EntryOutputChannel extends ByteArrayChannel {
878 final Entry e;
879
880 EntryOutputChannel(Entry e) {
881 super(e.size > 0? (int)e.size : 8192, false);
882 this.e = e;
883 if (e.mtime == -1)
884 e.mtime = System.currentTimeMillis();
885 if (e.method == -1)
886 e.method = defaultCompressionMethod;
887 // store size, compressed size, and crc-32 in datadescriptor
888 e.flag = FLAG_DATADESCR;
889 if (zc.isUTF8())
890 e.flag |= FLAG_USE_UTF8;
891 }
892
893 @Override
894 public void close() throws IOException {
895 // will update the entry
896 try (OutputStream os = getOutputStream(e)) {
897 os.write(toByteArray());
898 }
899 super.close();
900 }
901 }
902
903 // Returns a Writable/ReadByteChannel for now. Might consider to use
904 // newFileChannel() instead, which dump the entry data into a regular
905 // file on the default file system and create a FileChannel on top of it.
906 SeekableByteChannel newByteChannel(byte[] path,
907 Set<? extends OpenOption> options,
908 FileAttribute<?>... attrs)
909 throws IOException
910 {
911 checkOptions(options);
912 if (options.contains(StandardOpenOption.WRITE) ||
913 options.contains(StandardOpenOption.APPEND)) {
914 checkWritable();
915 beginRead(); // only need a read lock, the "update()" will obtain
916 // the write lock when the channel is closed
917 ensureOpen();
918 try {
919 Entry e = getEntry(path);
920 if (e != null) {
921 if (e.isDir() || options.contains(CREATE_NEW))
922 throw new FileAlreadyExistsException(getString(path));
923 SeekableByteChannel sbc =
924 new EntryOutputChannel(supportPosix ?
925 new PosixEntry((PosixEntry)e, Entry.NEW) :
926 new Entry(e, Entry.NEW));
927 if (options.contains(APPEND)) {
928 try (InputStream is = getInputStream(e)) { // copyover
929 byte[] buf = new byte[8192];
930 ByteBuffer bb = ByteBuffer.wrap(buf);
931 int n;
932 while ((n = is.read(buf)) != -1) {
933 bb.position(0);
934 bb.limit(n);
935 sbc.write(bb);
936 }
937 }
938 }
939 return sbc;
940 }
941 if (!options.contains(CREATE) && !options.contains(CREATE_NEW))
942 throw new NoSuchFileException(getString(path));
943 checkParents(path);
944 return new EntryOutputChannel(
945 supportPosix ?
946 new PosixEntry(path, Entry.NEW, false, defaultCompressionMethod, attrs) :
947 new Entry(path, Entry.NEW, false, defaultCompressionMethod, attrs));
948 } finally {
949 endRead();
950 }
951 } else {
952 beginRead();
953 try {
954 ensureOpen();
955 Entry e = getEntry(path);
956 if (e == null || e.isDir())
957 throw new NoSuchFileException(getString(path));
958 try (InputStream is = getInputStream(e)) {
959 // TBD: if (e.size < NNNNN);
960 return new ByteArrayChannel(is.readAllBytes(), true);
961 }
962 } finally {
963 endRead();
964 }
965 }
966 }
967
968 // Returns a FileChannel of the specified entry.
969 //
970 // This implementation creates a temporary file on the default file system,
971 // copy the entry data into it if the entry exists, and then create a
972 // FileChannel on top of it.
973 FileChannel newFileChannel(byte[] path,
974 Set<? extends OpenOption> options,
975 FileAttribute<?>... attrs)
976 throws IOException
977 {
978 checkOptions(options);
979 final boolean forWrite = (options.contains(StandardOpenOption.WRITE) ||
980 options.contains(StandardOpenOption.APPEND));
981 beginRead();
982 try {
983 ensureOpen();
984 Entry e = getEntry(path);
985 if (forWrite) {
986 checkWritable();
987 if (e == null) {
988 if (!options.contains(StandardOpenOption.CREATE) &&
989 !options.contains(StandardOpenOption.CREATE_NEW)) {
990 throw new NoSuchFileException(getString(path));
991 }
992 } else {
993 if (options.contains(StandardOpenOption.CREATE_NEW)) {
994 throw new FileAlreadyExistsException(getString(path));
995 }
996 if (e.isDir())
997 throw new FileAlreadyExistsException("directory <"
998 + getString(path) + "> exists");
999 }
1000 options = new HashSet<>(options);
1001 options.remove(StandardOpenOption.CREATE_NEW); // for tmpfile
1002 } else if (e == null || e.isDir()) {
1003 throw new NoSuchFileException(getString(path));
1004 }
1005
1006 final boolean isFCH = (e != null && e.type == Entry.FILECH);
1007 final Path tmpfile = isFCH ? e.file : getTempPathForEntry(path);
1008 final FileChannel fch = tmpfile.getFileSystem()
1009 .provider()
1010 .newFileChannel(tmpfile, options, attrs);
1011 final Entry u = isFCH ? e : (
1012 supportPosix ?
1013 new PosixEntry(path, tmpfile, Entry.FILECH, attrs) :
1014 new Entry(path, tmpfile, Entry.FILECH, attrs));
1015 if (forWrite) {
1016 u.flag = FLAG_DATADESCR;
1017 u.method = defaultCompressionMethod;
1018 }
1019 // is there a better way to hook into the FileChannel's close method?
1020 return new FileChannel() {
1021 public int write(ByteBuffer src) throws IOException {
1022 return fch.write(src);
1023 }
1024 public long write(ByteBuffer[] srcs, int offset, int length)
1025 throws IOException
1026 {
1027 return fch.write(srcs, offset, length);
1028 }
1029 public long position() throws IOException {
1030 return fch.position();
1031 }
1032 public FileChannel position(long newPosition)
1033 throws IOException
1034 {
1035 fch.position(newPosition);
1036 return this;
1037 }
1038 public long size() throws IOException {
1039 return fch.size();
1040 }
1041 public FileChannel truncate(long size)
1042 throws IOException
1043 {
1044 fch.truncate(size);
1045 return this;
1046 }
1047 public void force(boolean metaData)
1048 throws IOException
1049 {
1050 fch.force(metaData);
1051 }
1052 public long transferTo(long position, long count,
1053 WritableByteChannel target)
1054 throws IOException
1055 {
1056 return fch.transferTo(position, count, target);
1057 }
1058 public long transferFrom(ReadableByteChannel src,
1059 long position, long count)
1060 throws IOException
1061 {
1062 return fch.transferFrom(src, position, count);
1063 }
1064 public int read(ByteBuffer dst) throws IOException {
1065 return fch.read(dst);
1066 }
1067 public int read(ByteBuffer dst, long position)
1068 throws IOException
1069 {
1070 return fch.read(dst, position);
1071 }
1072 public long read(ByteBuffer[] dsts, int offset, int length)
1073 throws IOException
1074 {
1075 return fch.read(dsts, offset, length);
1076 }
1077 public int write(ByteBuffer src, long position)
1078 throws IOException
1079 {
1080 return fch.write(src, position);
1081 }
1082 public MappedByteBuffer map(MapMode mode,
1083 long position, long size)
1084 {
1085 throw new UnsupportedOperationException();
1086 }
1087 public FileLock lock(long position, long size, boolean shared)
1088 throws IOException
1089 {
1090 return fch.lock(position, size, shared);
1091 }
1092 public FileLock tryLock(long position, long size, boolean shared)
1093 throws IOException
1094 {
1095 return fch.tryLock(position, size, shared);
1096 }
1097 protected void implCloseChannel() throws IOException {
1098 fch.close();
1099 if (forWrite) {
1100 u.mtime = System.currentTimeMillis();
1101 u.size = Files.size(u.file);
1102 update(u);
1103 } else {
1104 if (!isFCH) // if this is a new fch for reading
1105 removeTempPathForEntry(tmpfile);
1106 }
1107 }
1108 };
1109 } finally {
1110 endRead();
1111 }
1112 }
1113
1114 // the outstanding input streams that need to be closed
1115 private Set<InputStream> streams =
1116 Collections.synchronizedSet(new HashSet<>());
1117
1118 private final Set<Path> tmppaths = Collections.synchronizedSet(new HashSet<>());
1119 private Path getTempPathForEntry(byte[] path) throws IOException {
1120 Path tmpPath = createTempFileInSameDirectoryAs(zfpath);
1121 if (path != null) {
1122 Entry e = getEntry(path);
1123 if (e != null) {
1124 try (InputStream is = newInputStream(path)) {
1125 Files.copy(is, tmpPath, REPLACE_EXISTING);
1126 }
1127 }
1128 }
1129 return tmpPath;
1130 }
1131
1132 private void removeTempPathForEntry(Path path) throws IOException {
1133 Files.delete(path);
1134 tmppaths.remove(path);
1135 }
1136
1137 // check if all parents really exist. ZIP spec does not require
1138 // the existence of any "parent directory".
1139 private void checkParents(byte[] path) throws IOException {
1140 beginRead();
1141 try {
1142 while ((path = getParent(path)) != null &&
1143 path != ROOTPATH) {
1144 if (!inodes.containsKey(IndexNode.keyOf(path))) {
1145 throw new NoSuchFileException(getString(path));
1146 }
1147 }
1148 } finally {
1149 endRead();
1150 }
1151 }
1152
1153 private static byte[] getParent(byte[] path) {
1154 int off = getParentOff(path);
1155 if (off <= 1)
1156 return ROOTPATH;
1157 return Arrays.copyOf(path, off);
1158 }
1159
1160 private static int getParentOff(byte[] path) {
1161 int off = path.length - 1;
1162 if (off > 0 && path[off] == '/') // isDirectory
1163 off--;
1164 while (off > 0 && path[off] != '/') { off--; }
1165 return off;
1166 }
1167
1168 private void beginWrite() {
1169 rwlock.writeLock().lock();
1170 }
1171
1172 private void endWrite() {
1173 rwlock.writeLock().unlock();
1174 }
1175
1176 private void beginRead() {
1177 rwlock.readLock().lock();
1178 }
1179
1180 private void endRead() {
1181 rwlock.readLock().unlock();
1182 }
1183
1184 ///////////////////////////////////////////////////////////////////
1185
1186 private volatile boolean isOpen = true;
1187 private final SeekableByteChannel ch; // channel to the zipfile
1188 final byte[] cen; // CEN & ENDHDR
1189 private END end;
1190 private long locpos; // position of first LOC header (usually 0)
1191
1192 private final ReadWriteLock rwlock = new ReentrantReadWriteLock();
1193
1194 // name -> pos (in cen), IndexNode itself can be used as a "key"
1195 private LinkedHashMap<IndexNode, IndexNode> inodes;
1196
1197 final byte[] getBytes(String name) {
1198 return zc.getBytes(name);
1199 }
1200
1201 final String getString(byte[] name) {
1202 return zc.toString(name);
1203 }
1204
1205 @SuppressWarnings("deprecation")
1206 protected void finalize() throws IOException {
1207 close();
1208 }
1209
1210 // Reads len bytes of data from the specified offset into buf.
1211 // Returns the total number of bytes read.
1212 // Each/every byte read from here (except the cen, which is mapped).
1213 final long readFullyAt(byte[] buf, int off, long len, long pos)
1214 throws IOException
1215 {
1216 ByteBuffer bb = ByteBuffer.wrap(buf);
1217 bb.position(off);
1218 bb.limit((int)(off + len));
1219 return readFullyAt(bb, pos);
1220 }
1221
1222 private long readFullyAt(ByteBuffer bb, long pos) throws IOException {
1223 synchronized(ch) {
1224 return ch.position(pos).read(bb);
1225 }
1226 }
1227
1228 // Searches for end of central directory (END) header. The contents of
1229 // the END header will be read and placed in endbuf. Returns the file
1230 // position of the END header, otherwise returns -1 if the END header
1231 // was not found or an error occurred.
1232 private END findEND() throws IOException {
1233 byte[] buf = new byte[READBLOCKSZ];
1234 long ziplen = ch.size();
1235 long minHDR = (ziplen - END_MAXLEN) > 0 ? ziplen - END_MAXLEN : 0;
1236 long minPos = minHDR - (buf.length - ENDHDR);
1237
1238 for (long pos = ziplen - buf.length; pos >= minPos; pos -= (buf.length - ENDHDR)) {
1239 int off = 0;
1240 if (pos < 0) {
1241 // Pretend there are some NUL bytes before start of file
1242 off = (int)-pos;
1243 Arrays.fill(buf, 0, off, (byte)0);
1244 }
1245 int len = buf.length - off;
1246 if (readFullyAt(buf, off, len, pos + off) != len)
1247 throw new ZipException("zip END header not found");
1248
1249 // Now scan the block backwards for END header signature
1250 for (int i = buf.length - ENDHDR; i >= 0; i--) {
1251 if (buf[i] == (byte)'P' &&
1252 buf[i+1] == (byte)'K' &&
1253 buf[i+2] == (byte)'\005' &&
1254 buf[i+3] == (byte)'\006' &&
1255 (pos + i + ENDHDR + ENDCOM(buf, i) == ziplen)) {
1256 // Found END header
1257 buf = Arrays.copyOfRange(buf, i, i + ENDHDR);
1258 END end = new END();
1259 // end.endsub = ENDSUB(buf); // not used
1260 end.centot = ENDTOT(buf);
1261 end.cenlen = ENDSIZ(buf);
1262 end.cenoff = ENDOFF(buf);
1263 // end.comlen = ENDCOM(buf); // not used
1264 end.endpos = pos + i;
1265 // try if there is zip64 end;
1266 byte[] loc64 = new byte[ZIP64_LOCHDR];
1267 if (end.endpos < ZIP64_LOCHDR ||
1268 readFullyAt(loc64, 0, loc64.length, end.endpos - ZIP64_LOCHDR)
1269 != loc64.length ||
1270 !locator64SigAt(loc64, 0)) {
1271 return end;
1272 }
1273 long end64pos = ZIP64_LOCOFF(loc64);
1274 byte[] end64buf = new byte[ZIP64_ENDHDR];
1275 if (readFullyAt(end64buf, 0, end64buf.length, end64pos)
1276 != end64buf.length ||
1277 !end64SigAt(end64buf, 0)) {
1278 return end;
1279 }
1280 // end64 found,
1281 long cenlen64 = ZIP64_ENDSIZ(end64buf);
1282 long cenoff64 = ZIP64_ENDOFF(end64buf);
1283 long centot64 = ZIP64_ENDTOT(end64buf);
1284 // double-check
1285 if (cenlen64 != end.cenlen && end.cenlen != ZIP64_MINVAL ||
1286 cenoff64 != end.cenoff && end.cenoff != ZIP64_MINVAL ||
1287 centot64 != end.centot && end.centot != ZIP64_MINVAL32) {
1288 return end;
1289 }
1290 // to use the end64 values
1291 end.cenlen = cenlen64;
1292 end.cenoff = cenoff64;
1293 end.centot = (int)centot64; // assume total < 2g
1294 end.endpos = end64pos;
1295 return end;
1296 }
1297 }
1298 }
1299 throw new ZipException("zip END header not found");
1300 }
1301
1302 private void makeParentDirs(IndexNode node, IndexNode root) {
1303 IndexNode parent;
1304 ParentLookup lookup = new ParentLookup();
1305 while (true) {
1306 int off = getParentOff(node.name);
1307 // parent is root
1308 if (off <= 1) {
1309 node.sibling = root.child;
1310 root.child = node;
1311 break;
1312 }
1313 // parent exists
1314 lookup = lookup.as(node.name, off);
1315 if (inodes.containsKey(lookup)) {
1316 parent = inodes.get(lookup);
1317 node.sibling = parent.child;
1318 parent.child = node;
1319 break;
1320 }
1321 // parent does not exist, add new pseudo directory entry
1322 parent = new IndexNode(Arrays.copyOf(node.name, off), true);
1323 inodes.put(parent, parent);
1324 node.sibling = parent.child;
1325 parent.child = node;
1326 node = parent;
1327 }
1328 }
1329
1330 // ZIP directory has two issues:
1331 // (1) ZIP spec does not require the ZIP file to include
1332 // directory entry
1333 // (2) all entries are not stored/organized in a "tree"
1334 // structure.
1335 // A possible solution is to build the node tree ourself as
1336 // implemented below.
1337 private void buildNodeTree() {
1338 beginWrite();
1339 try {
1340 IndexNode root = inodes.remove(LOOKUPKEY.as(ROOTPATH));
1341 if (root == null) {
1342 root = new IndexNode(ROOTPATH, true);
1343 }
1344 IndexNode[] nodes = inodes.values().toArray(new IndexNode[0]);
1345 inodes.put(root, root);
1346 for (IndexNode node : nodes) {
1347 makeParentDirs(node, root);
1348 }
1349 } finally {
1350 endWrite();
1351 }
1352 }
1353
1354 private void removeFromTree(IndexNode inode) {
1355 IndexNode parent = inodes.get(LOOKUPKEY.as(getParent(inode.name)));
1356 IndexNode child = parent.child;
1357 if (child.equals(inode)) {
1358 parent.child = child.sibling;
1359 } else {
1360 IndexNode last = child;
1361 while ((child = child.sibling) != null) {
1362 if (child.equals(inode)) {
1363 last.sibling = child.sibling;
1364 break;
1365 } else {
1366 last = child;
1367 }
1368 }
1369 }
1370 }
1371
1372 /**
1373 * If a version property has been specified and the file represents a multi-release JAR,
1374 * determine the requested runtime version and initialize the ZipFileSystem instance accordingly.
1375 *
1376 * Checks if the Zip File System property "releaseVersion" has been specified. If it has,
1377 * use its value to determine the requested version. If not use the value of the "multi-release" property.
1378 */
1379 private void initializeReleaseVersion(Map<String, ?> env) throws IOException {
1380 Object o = env.containsKey(PROPERTY_RELEASE_VERSION) ?
1381 env.get(PROPERTY_RELEASE_VERSION) :
1382 env.get(PROPERTY_MULTI_RELEASE);
1383
1384 if (o != null && isMultiReleaseJar()) {
1385 int version;
1386 if (o instanceof String) {
1387 String s = (String)o;
1388 if (s.equals("runtime")) {
1389 version = Runtime.version().feature();
1390 } else if (s.matches("^[1-9][0-9]*$")) {
1391 version = Version.parse(s).feature();
1392 } else {
1393 throw new IllegalArgumentException("Invalid runtime version");
1394 }
1395 } else if (o instanceof Integer) {
1396 version = Version.parse(((Integer)o).toString()).feature();
1397 } else if (o instanceof Version) {
1398 version = ((Version)o).feature();
1399 } else {
1400 throw new IllegalArgumentException("env parameter must be String, " +
1401 "Integer, or Version");
1402 }
1403 createVersionedLinks(version < 0 ? 0 : version);
1404 setReadOnly();
1405 }
1406 }
1407
1408 /**
1409 * Returns true if the Manifest main attribute "Multi-Release" is set to true; false otherwise.
1410 */
1411 private boolean isMultiReleaseJar() throws IOException {
1412 try (InputStream is = newInputStream(getBytes("/META-INF/MANIFEST.MF"))) {
1413 String multiRelease = new Manifest(is).getMainAttributes()
1414 .getValue(Attributes.Name.MULTI_RELEASE);
1415 return "true".equalsIgnoreCase(multiRelease);
1416 } catch (NoSuchFileException x) {
1417 return false;
1418 }
1419 }
1420
1421 /**
1422 * Create a map of aliases for versioned entries, for example:
1423 * version/PackagePrivate.class -> META-INF/versions/9/version/PackagePrivate.class
1424 * version/PackagePrivate.java -> META-INF/versions/9/version/PackagePrivate.java
1425 * version/Version.class -> META-INF/versions/10/version/Version.class
1426 * version/Version.java -> META-INF/versions/10/version/Version.java
1427 *
1428 * Then wrap the map in a function that getEntry can use to override root
1429 * entry lookup for entries that have corresponding versioned entries.
1430 */
1431 private void createVersionedLinks(int version) {
1432 IndexNode verdir = getInode(getBytes("/META-INF/versions"));
1433 // nothing to do, if no /META-INF/versions
1434 if (verdir == null) {
1435 return;
1436 }
1437 // otherwise, create a map and for each META-INF/versions/{n} directory
1438 // put all the leaf inodes, i.e. entries, into the alias map
1439 // possibly shadowing lower versioned entries
1440 HashMap<IndexNode, byte[]> aliasMap = new HashMap<>();
1441 getVersionMap(version, verdir).values().forEach(versionNode ->
1442 walk(versionNode.child, entryNode ->
1443 aliasMap.put(
1444 getOrCreateInode(getRootName(entryNode, versionNode), entryNode.isdir),
1445 entryNode.name))
1446 );
1447 entryLookup = path -> {
1448 byte[] entry = aliasMap.get(IndexNode.keyOf(path));
1449 return entry == null ? path : entry;
1450 };
1451 }
1452
1453 /**
1454 * Create a sorted version map of version -> inode, for inodes <= max version.
1455 * 9 -> META-INF/versions/9
1456 * 10 -> META-INF/versions/10
1457 */
1458 private TreeMap<Integer, IndexNode> getVersionMap(int version, IndexNode metaInfVersions) {
1459 TreeMap<Integer,IndexNode> map = new TreeMap<>();
1460 IndexNode child = metaInfVersions.child;
1461 while (child != null) {
1462 Integer key = getVersion(child, metaInfVersions);
1463 if (key != null && key <= version) {
1464 map.put(key, child);
1465 }
1466 child = child.sibling;
1467 }
1468 return map;
1469 }
1470
1471 /**
1472 * Extract the integer version number -- META-INF/versions/9 returns 9.
1473 */
1474 private Integer getVersion(IndexNode inode, IndexNode metaInfVersions) {
1475 try {
1476 byte[] fullName = inode.name;
1477 return Integer.parseInt(getString(Arrays
1478 .copyOfRange(fullName, metaInfVersions.name.length + 1, fullName.length)));
1479 } catch (NumberFormatException x) {
1480 // ignore this even though it might indicate issues with the JAR structure
1481 return null;
1482 }
1483 }
1484
1485 /**
1486 * Walk the IndexNode tree processing all leaf nodes.
1487 */
1488 private void walk(IndexNode inode, Consumer<IndexNode> consumer) {
1489 if (inode == null) return;
1490 if (inode.isDir()) {
1491 walk(inode.child, consumer);
1492 } else {
1493 consumer.accept(inode);
1494 }
1495 walk(inode.sibling, consumer);
1496 }
1497
1498 /**
1499 * Extract the root name from a versioned entry name.
1500 * E.g. given inode 'META-INF/versions/9/foo/bar.class'
1501 * and prefix 'META-INF/versions/9/' returns 'foo/bar.class'.
1502 */
1503 private byte[] getRootName(IndexNode inode, IndexNode prefix) {
1504 byte[] fullName = inode.name;
1505 return Arrays.copyOfRange(fullName, prefix.name.length, fullName.length);
1506 }
1507
1508 // Reads zip file central directory. Returns the file position of first
1509 // CEN header, otherwise returns -1 if an error occurred. If zip->msg != NULL
1510 // then the error was a zip format error and zip->msg has the error text.
1511 // Always pass in -1 for knownTotal; it's used for a recursive call.
1512 private byte[] initCEN() throws IOException {
1513 end = findEND();
1514 if (end.endpos == 0) {
1515 inodes = new LinkedHashMap<>(10);
1516 locpos = 0;
1517 buildNodeTree();
1518 return null; // only END header present
1519 }
1520 if (end.cenlen > end.endpos)
1521 throw new ZipException("invalid END header (bad central directory size)");
1522 long cenpos = end.endpos - end.cenlen; // position of CEN table
1523
1524 // Get position of first local file (LOC) header, taking into
1525 // account that there may be a stub prefixed to the zip file.
1526 locpos = cenpos - end.cenoff;
1527 if (locpos < 0)
1528 throw new ZipException("invalid END header (bad central directory offset)");
1529
1530 // read in the CEN and END
1531 byte[] cen = new byte[(int)(end.cenlen + ENDHDR)];
1532 if (readFullyAt(cen, 0, cen.length, cenpos) != end.cenlen + ENDHDR) {
1533 throw new ZipException("read CEN tables failed");
1534 }
1535 // Iterate through the entries in the central directory
1536 inodes = new LinkedHashMap<>(end.centot + 1);
1537 int pos = 0;
1538 int limit = cen.length - ENDHDR;
1539 while (pos < limit) {
1540 if (!cenSigAt(cen, pos))
1541 throw new ZipException("invalid CEN header (bad signature)");
1542 int method = CENHOW(cen, pos);
1543 int nlen = CENNAM(cen, pos);
1544 int elen = CENEXT(cen, pos);
1545 int clen = CENCOM(cen, pos);
1546 if ((CENFLG(cen, pos) & 1) != 0) {
1547 throw new ZipException("invalid CEN header (encrypted entry)");
1548 }
1549 if (method != METHOD_STORED && method != METHOD_DEFLATED) {
1550 throw new ZipException("invalid CEN header (unsupported compression method: " + method + ")");
1551 }
1552 if (pos + CENHDR + nlen > limit) {
1553 throw new ZipException("invalid CEN header (bad header size)");
1554 }
1555 IndexNode inode = new IndexNode(cen, pos, nlen);
1556 inodes.put(inode, inode);
1557
1558 // skip ext and comment
1559 pos += (CENHDR + nlen + elen + clen);
1560 }
1561 if (pos + ENDHDR != cen.length) {
1562 throw new ZipException("invalid CEN header (bad header size)");
1563 }
1564 buildNodeTree();
1565 return cen;
1566 }
1567
1568 private void ensureOpen() {
1569 if (!isOpen)
1570 throw new ClosedFileSystemException();
1571 }
1572
1573 // Creates a new empty temporary file in the same directory as the
1574 // specified file. A variant of Files.createTempFile.
1575 private Path createTempFileInSameDirectoryAs(Path path) throws IOException {
1576 Path parent = path.toAbsolutePath().getParent();
1577 Path dir = (parent == null) ? path.getFileSystem().getPath(".") : parent;
1578 Path tmpPath = Files.createTempFile(dir, "zipfstmp", null);
1579 tmppaths.add(tmpPath);
1580 return tmpPath;
1581 }
1582
1583 ////////////////////update & sync //////////////////////////////////////
1584
1585 private boolean hasUpdate = false;
1586
1587 // shared key. consumer guarantees the "writeLock" before use it.
1588 private final IndexNode LOOKUPKEY = new IndexNode(null, -1);
1589
1590 private void updateDelete(IndexNode inode) {
1591 beginWrite();
1592 try {
1593 removeFromTree(inode);
1594 inodes.remove(inode);
1595 hasUpdate = true;
1596 } finally {
1597 endWrite();
1598 }
1599 }
1600
1601 private void update(Entry e) {
1602 beginWrite();
1603 try {
1604 IndexNode old = inodes.put(e, e);
1605 if (old != null) {
1606 removeFromTree(old);
1607 }
1608 if (e.type == Entry.NEW || e.type == Entry.FILECH || e.type == Entry.COPY) {
1609 IndexNode parent = inodes.get(LOOKUPKEY.as(getParent(e.name)));
1610 e.sibling = parent.child;
1611 parent.child = e;
1612 }
1613 hasUpdate = true;
1614 } finally {
1615 endWrite();
1616 }
1617 }
1618
1619 // copy over the whole LOC entry (header if necessary, data and ext) from
1620 // old zip to the new one.
1621 private long copyLOCEntry(Entry e, boolean updateHeader,
1622 OutputStream os,
1623 long written, byte[] buf)
1624 throws IOException
1625 {
1626 long locoff = e.locoff; // where to read
1627 e.locoff = written; // update the e.locoff with new value
1628
1629 // calculate the size need to write out
1630 long size = 0;
1631 // if there is A ext
1632 if ((e.flag & FLAG_DATADESCR) != 0) {
1633 if (e.size >= ZIP64_MINVAL || e.csize >= ZIP64_MINVAL)
1634 size = 24;
1635 else
1636 size = 16;
1637 }
1638 // read loc, use the original loc.elen/nlen
1639 //
1640 // an extra byte after loc is read, which should be the first byte of the
1641 // 'name' field of the loc. if this byte is '/', which means the original
1642 // entry has an absolute path in original zip/jar file, the e.writeLOC()
1643 // is used to output the loc, in which the leading "/" will be removed
1644 if (readFullyAt(buf, 0, LOCHDR + 1 , locoff) != LOCHDR + 1)
1645 throw new ZipException("loc: reading failed");
1646
1647 if (updateHeader || LOCNAM(buf) > 0 && buf[LOCHDR] == '/') {
1648 locoff += LOCHDR + LOCNAM(buf) + LOCEXT(buf); // skip header
1649 size += e.csize;
1650 written = e.writeLOC(os) + size;
1651 } else {
1652 os.write(buf, 0, LOCHDR); // write out the loc header
1653 locoff += LOCHDR;
1654 // use e.csize, LOCSIZ(buf) is zero if FLAG_DATADESCR is on
1655 // size += LOCNAM(buf) + LOCEXT(buf) + LOCSIZ(buf);
1656 size += LOCNAM(buf) + LOCEXT(buf) + e.csize;
1657 written = LOCHDR + size;
1658 }
1659 int n;
1660 while (size > 0 &&
1661 (n = (int)readFullyAt(buf, 0, buf.length, locoff)) != -1)
1662 {
1663 if (size < n)
1664 n = (int)size;
1665 os.write(buf, 0, n);
1666 size -= n;
1667 locoff += n;
1668 }
1669 return written;
1670 }
1671
1672 private long writeEntry(Entry e, OutputStream os)
1673 throws IOException {
1674
1675 if (e.bytes == null && e.file == null) // dir, 0-length data
1676 return 0;
1677
1678 long written = 0;
1679 if (e.method != METHOD_STORED && e.csize > 0 && (e.crc != 0 || e.size == 0)) {
1680 // pre-compressed entry, write directly to output stream
1681 writeTo(e, os);
1682 } else {
1683 try (OutputStream os2 = (e.method == METHOD_STORED) ?
1684 new EntryOutputStreamCRC32(e, os) : new EntryOutputStreamDef(e, os)) {
1685 writeTo(e, os2);
1686 }
1687 }
1688 written += e.csize;
1689 if ((e.flag & FLAG_DATADESCR) != 0) {
1690 written += e.writeEXT(os);
1691 }
1692 return written;
1693 }
1694
1695 private void writeTo(Entry e, OutputStream os) throws IOException {
1696 if (e.bytes != null) {
1697 os.write(e.bytes, 0, e.bytes.length);
1698 } else if (e.file != null) {
1699 if (e.type == Entry.NEW || e.type == Entry.FILECH) {
1700 try (InputStream is = Files.newInputStream(e.file)) {
1701 is.transferTo(os);
1702 }
1703 }
1704 Files.delete(e.file);
1705 tmppaths.remove(e.file);
1706 }
1707 }
1708
1709 // sync the zip file system, if there is any update
1710 private void sync() throws IOException {
1711 if (!hasUpdate)
1712 return;
1713 PosixFileAttributes attrs = getPosixAttributes(zfpath);
1714 Path tmpFile = createTempFileInSameDirectoryAs(zfpath);
1715 try (OutputStream os = new BufferedOutputStream(Files.newOutputStream(tmpFile, WRITE))) {
1716 ArrayList<Entry> elist = new ArrayList<>(inodes.size());
1717 long written = 0;
1718 byte[] buf = null;
1719 Entry e;
1720
1721 // write loc
1722 for (IndexNode inode : inodes.values()) {
1723 if (inode instanceof Entry) { // an updated inode
1724 e = (Entry)inode;
1725 try {
1726 if (e.type == Entry.COPY) {
1727 // entry copy: the only thing changed is the "name"
1728 // and "nlen" in LOC header, so we update/rewrite the
1729 // LOC in new file and simply copy the rest (data and
1730 // ext) without enflating/deflating from the old zip
1731 // file LOC entry.
1732 if (buf == null)
1733 buf = new byte[8192];
1734 written += copyLOCEntry(e, true, os, written, buf);
1735 } else { // NEW, FILECH or CEN
1736 e.locoff = written;
1737 written += e.writeLOC(os); // write loc header
1738 written += writeEntry(e, os);
1739 }
1740 elist.add(e);
1741 } catch (IOException x) {
1742 x.printStackTrace(); // skip any in-accurate entry
1743 }
1744 } else { // unchanged inode
1745 if (inode.pos == -1) {
1746 continue; // pseudo directory node
1747 }
1748 if (inode.name.length == 1 && inode.name[0] == '/') {
1749 continue; // no root '/' directory even if it
1750 // exists in original zip/jar file.
1751 }
1752 e = supportPosix ? new PosixEntry(this, inode) : new Entry(this, inode);
1753 try {
1754 if (buf == null)
1755 buf = new byte[8192];
1756 written += copyLOCEntry(e, false, os, written, buf);
1757 elist.add(e);
1758 } catch (IOException x) {
1759 x.printStackTrace(); // skip any wrong entry
1760 }
1761 }
1762 }
1763
1764 // now write back the cen and end table
1765 end.cenoff = written;
1766 for (Entry entry : elist) {
1767 written += entry.writeCEN(os);
1768 }
1769 end.centot = elist.size();
1770 end.cenlen = written - end.cenoff;
1771 end.write(os, written, forceEnd64);
1772 }
1773 ch.close();
1774 Files.delete(zfpath);
1775
1776 // Set the POSIX permissions of the original Zip File if available
1777 // before moving the temp file
1778 if (attrs != null) {
1779 Files.setPosixFilePermissions(tmpFile, attrs.permissions());
1780 }
1781 Files.move(tmpFile, zfpath, REPLACE_EXISTING);
1782 hasUpdate = false; // clear
1783 }
1784
1785 /**
1786 * Returns a file's POSIX file attributes.
1787 * @param path The path to the file
1788 * @return The POSIX file attributes for the specified file or
1789 * null if the POSIX attribute view is not available
1790 * @throws IOException If an error occurs obtaining the POSIX attributes for
1791 * the specified file
1792 */
1793 private PosixFileAttributes getPosixAttributes(Path path) throws IOException {
1794 try {
1795 PosixFileAttributeView view =
1796 Files.getFileAttributeView(path, PosixFileAttributeView.class);
1797 // Return if the attribute view is not supported
1798 if (view == null) {
1799 return null;
1800 }
1801 return view.readAttributes();
1802 } catch (UnsupportedOperationException e) {
1803 // PosixFileAttributes not available
1804 return null;
1805 }
1806 }
1807
1808 private IndexNode getInode(byte[] path) {
1809 return inodes.get(IndexNode.keyOf(Objects.requireNonNull(entryLookup.apply(path), "path")));
1810 }
1811
1812 /**
1813 * Return the IndexNode from the root tree. If it doesn't exist,
1814 * it gets created along with all parent directory IndexNodes.
1815 */
1816 private IndexNode getOrCreateInode(byte[] path, boolean isdir) {
1817 IndexNode node = getInode(path);
1818 // if node exists, return it
1819 if (node != null) {
1820 return node;
1821 }
1822
1823 // otherwise create new pseudo node and parent directory hierarchy
1824 node = new IndexNode(path, isdir);
1825 beginWrite();
1826 try {
1827 makeParentDirs(node, Objects.requireNonNull(inodes.get(IndexNode.keyOf(ROOTPATH)), "no root node found"));
1828 return node;
1829 } finally {
1830 endWrite();
1831 }
1832 }
1833
1834 private Entry getEntry(byte[] path) throws IOException {
1835 IndexNode inode = getInode(path);
1836 if (inode instanceof Entry)
1837 return (Entry)inode;
1838 if (inode == null || inode.pos == -1)
1839 return null;
1840 return supportPosix ? new PosixEntry(this, inode): new Entry(this, inode);
1841 }
1842
1843 public void deleteFile(byte[] path, boolean failIfNotExists)
1844 throws IOException
1845 {
1846 checkWritable();
1847 IndexNode inode = getInode(path);
1848 if (inode == null) {
1849 if (path != null && path.length == 0)
1850 throw new ZipException("root directory </> can't not be delete");
1851 if (failIfNotExists)
1852 throw new NoSuchFileException(getString(path));
1853 } else {
1854 if (inode.isDir() && inode.child != null)
1855 throw new DirectoryNotEmptyException(getString(path));
1856 updateDelete(inode);
1857 }
1858 }
1859
1860 // Returns an out stream for either
1861 // (1) writing the contents of a new entry, if the entry exists, or
1862 // (2) updating/replacing the contents of the specified existing entry.
1863 private OutputStream getOutputStream(Entry e) throws IOException {
1864 if (e.mtime == -1)
1865 e.mtime = System.currentTimeMillis();
1866 if (e.method == -1)
1867 e.method = defaultCompressionMethod;
1868 // store size, compressed size, and crc-32 in datadescr
1869 e.flag = FLAG_DATADESCR;
1870 if (zc.isUTF8())
1871 e.flag |= FLAG_USE_UTF8;
1872 OutputStream os;
1873 if (useTempFile) {
1874 e.file = getTempPathForEntry(null);
1875 os = Files.newOutputStream(e.file, WRITE);
1876 } else {
1877 os = new ByteArrayOutputStream((e.size > 0)? (int)e.size : 8192);
1878 }
1879 if (e.method == METHOD_DEFLATED) {
1880 return new DeflatingEntryOutputStream(e, os);
1881 } else {
1882 return new EntryOutputStream(e, os);
1883 }
1884 }
1885
1886 private class EntryOutputStream extends FilterOutputStream {
1887 private final Entry e;
1888 private long written;
1889 private boolean isClosed;
1890
1891 EntryOutputStream(Entry e, OutputStream os) {
1892 super(os);
1893 this.e = Objects.requireNonNull(e, "Zip entry is null");
1894 // this.written = 0;
1895 }
1896
1897 @Override
1898 public synchronized void write(int b) throws IOException {
1899 out.write(b);
1900 written += 1;
1901 }
1902
1903 @Override
1904 public synchronized void write(byte[] b, int off, int len)
1905 throws IOException {
1906 out.write(b, off, len);
1907 written += len;
1908 }
1909
1910 @Override
1911 public synchronized void close() throws IOException {
1912 if (isClosed) {
1913 return;
1914 }
1915 isClosed = true;
1916 e.size = written;
1917 if (out instanceof ByteArrayOutputStream)
1918 e.bytes = ((ByteArrayOutputStream)out).toByteArray();
1919 super.close();
1920 update(e);
1921 }
1922 }
1923
1924 // Output stream returned when writing "deflated" entries into memory,
1925 // to enable eager (possibly parallel) deflation and reduce memory required.
1926 private class DeflatingEntryOutputStream extends DeflaterOutputStream {
1927 private final CRC32 crc;
1928 private final Entry e;
1929 private boolean isClosed;
1930
1931 DeflatingEntryOutputStream(Entry e, OutputStream os) {
1932 super(os, getDeflater());
1933 this.e = Objects.requireNonNull(e, "Zip entry is null");
1934 this.crc = new CRC32();
1935 }
1936
1937 @Override
1938 public synchronized void write(byte[] b, int off, int len)
1939 throws IOException {
1940 super.write(b, off, len);
1941 crc.update(b, off, len);
1942 }
1943
1944 @Override
1945 public synchronized void close() throws IOException {
1946 if (isClosed)
1947 return;
1948 isClosed = true;
1949 finish();
1950 e.size = def.getBytesRead();
1951 e.csize = def.getBytesWritten();
1952 e.crc = crc.getValue();
1953 if (out instanceof ByteArrayOutputStream)
1954 e.bytes = ((ByteArrayOutputStream)out).toByteArray();
1955 super.close();
1956 update(e);
1957 releaseDeflater(def);
1958 }
1959 }
1960
1961 // Wrapper output stream class to write out a "stored" entry.
1962 // (1) this class does not close the underlying out stream when
1963 // being closed.
1964 // (2) no need to be "synchronized", only used by sync()
1965 private class EntryOutputStreamCRC32 extends FilterOutputStream {
1966 private final CRC32 crc;
1967 private final Entry e;
1968 private long written;
1969 private boolean isClosed;
1970
1971 EntryOutputStreamCRC32(Entry e, OutputStream os) {
1972 super(os);
1973 this.e = Objects.requireNonNull(e, "Zip entry is null");
1974 this.crc = new CRC32();
1975 }
1976
1977 @Override
1978 public void write(int b) throws IOException {
1979 out.write(b);
1980 crc.update(b);
1981 written += 1;
1982 }
1983
1984 @Override
1985 public void write(byte[] b, int off, int len)
1986 throws IOException {
1987 out.write(b, off, len);
1988 crc.update(b, off, len);
1989 written += len;
1990 }
1991
1992 @Override
1993 public void close() {
1994 if (isClosed)
1995 return;
1996 isClosed = true;
1997 e.size = e.csize = written;
1998 e.crc = crc.getValue();
1999 }
2000 }
2001
2002 // Wrapper output stream class to write out a "deflated" entry.
2003 // (1) this class does not close the underlying out stream when
2004 // being closed.
2005 // (2) no need to be "synchronized", only used by sync()
2006 private class EntryOutputStreamDef extends DeflaterOutputStream {
2007 private final CRC32 crc;
2008 private final Entry e;
2009 private boolean isClosed;
2010
2011 EntryOutputStreamDef(Entry e, OutputStream os) {
2012 super(os, getDeflater());
2013 this.e = Objects.requireNonNull(e, "Zip entry is null");
2014 this.crc = new CRC32();
2015 }
2016
2017 @Override
2018 public void write(byte[] b, int off, int len) throws IOException {
2019 super.write(b, off, len);
2020 crc.update(b, off, len);
2021 }
2022
2023 @Override
2024 public void close() throws IOException {
2025 if (isClosed)
2026 return;
2027 isClosed = true;
2028 finish();
2029 e.size = def.getBytesRead();
2030 e.csize = def.getBytesWritten();
2031 e.crc = crc.getValue();
2032 releaseDeflater(def);
2033 }
2034 }
2035
2036 private InputStream getInputStream(Entry e)
2037 throws IOException
2038 {
2039 InputStream eis;
2040 if (e.type == Entry.NEW) {
2041 if (e.bytes != null)
2042 eis = new ByteArrayInputStream(e.bytes);
2043 else if (e.file != null)
2044 eis = Files.newInputStream(e.file);
2045 else
2046 throw new ZipException("update entry data is missing");
2047 } else if (e.type == Entry.FILECH) {
2048 // FILECH result is un-compressed.
2049 eis = Files.newInputStream(e.file);
2050 // TBD: wrap to hook close()
2051 // streams.add(eis);
2052 return eis;
2053 } else { // untouched CEN or COPY
2054 eis = new EntryInputStream(e, ch);
2055 }
2056 if (e.method == METHOD_DEFLATED) {
2057 // MORE: Compute good size for inflater stream:
2058 long bufSize = e.size + 2; // Inflater likes a bit of slack
2059 if (bufSize > 65536)
2060 bufSize = 8192;
2061 final long size = e.size;
2062 eis = new InflaterInputStream(eis, getInflater(), (int)bufSize) {
2063 private boolean isClosed = false;
2064 public void close() throws IOException {
2065 if (!isClosed) {
2066 releaseInflater(inf);
2067 this.in.close();
2068 isClosed = true;
2069 streams.remove(this);
2070 }
2071 }
2072 // Override fill() method to provide an extra "dummy" byte
2073 // at the end of the input stream. This is required when
2074 // using the "nowrap" Inflater option. (it appears the new
2075 // zlib in 7 does not need it, but keep it for now)
2076 protected void fill() throws IOException {
2077 if (eof) {
2078 throw new EOFException(
2079 "Unexpected end of ZLIB input stream");
2080 }
2081 len = this.in.read(buf, 0, buf.length);
2082 if (len == -1) {
2083 buf[0] = 0;
2084 len = 1;
2085 eof = true;
2086 }
2087 inf.setInput(buf, 0, len);
2088 }
2089 private boolean eof;
2090
2091 public int available() {
2092 if (isClosed)
2093 return 0;
2094 long avail = size - inf.getBytesWritten();
2095 return avail > (long) Integer.MAX_VALUE ?
2096 Integer.MAX_VALUE : (int) avail;
2097 }
2098 };
2099 } else if (e.method == METHOD_STORED) {
2100 // TBD: wrap/ it does not seem necessary
2101 } else {
2102 throw new ZipException("invalid compression method");
2103 }
2104 streams.add(eis);
2105 return eis;
2106 }
2107
2108 // Inner class implementing the input stream used to read
2109 // a (possibly compressed) zip file entry.
2110 private class EntryInputStream extends InputStream {
2111 private final SeekableByteChannel zfch; // local ref to zipfs's "ch". zipfs.ch might
2112 // point to a new channel after sync()
2113 private long pos; // current position within entry data
2114 private long rem; // number of remaining bytes within entry
2115
2116 EntryInputStream(Entry e, SeekableByteChannel zfch)
2117 throws IOException
2118 {
2119 this.zfch = zfch;
2120 rem = e.csize;
2121 pos = e.locoff;
2122 if (pos == -1) {
2123 Entry e2 = getEntry(e.name);
2124 if (e2 == null) {
2125 throw new ZipException("invalid loc for entry <" + getString(e.name) + ">");
2126 }
2127 pos = e2.locoff;
2128 }
2129 pos = -pos; // lazy initialize the real data offset
2130 }
2131
2132 public int read(byte[] b, int off, int len) throws IOException {
2133 ensureOpen();
2134 initDataPos();
2135 if (rem == 0) {
2136 return -1;
2137 }
2138 if (len <= 0) {
2139 return 0;
2140 }
2141 if (len > rem) {
2142 len = (int) rem;
2143 }
2144 // readFullyAt()
2145 long n;
2146 ByteBuffer bb = ByteBuffer.wrap(b);
2147 bb.position(off);
2148 bb.limit(off + len);
2149 synchronized(zfch) {
2150 n = zfch.position(pos).read(bb);
2151 }
2152 if (n > 0) {
2153 pos += n;
2154 rem -= n;
2155 }
2156 if (rem == 0) {
2157 close();
2158 }
2159 return (int)n;
2160 }
2161
2162 public int read() throws IOException {
2163 byte[] b = new byte[1];
2164 if (read(b, 0, 1) == 1) {
2165 return b[0] & 0xff;
2166 } else {
2167 return -1;
2168 }
2169 }
2170
2171 public long skip(long n) {
2172 ensureOpen();
2173 if (n > rem)
2174 n = rem;
2175 pos += n;
2176 rem -= n;
2177 if (rem == 0) {
2178 close();
2179 }
2180 return n;
2181 }
2182
2183 public int available() {
2184 return rem > Integer.MAX_VALUE ? Integer.MAX_VALUE : (int) rem;
2185 }
2186
2187 public void close() {
2188 rem = 0;
2189 streams.remove(this);
2190 }
2191
2192 private void initDataPos() throws IOException {
2193 if (pos <= 0) {
2194 pos = -pos + locpos;
2195 byte[] buf = new byte[LOCHDR];
2196 if (readFullyAt(buf, 0, buf.length, pos) != LOCHDR) {
2197 throw new ZipException("invalid loc " + pos + " for entry reading");
2198 }
2199 pos += LOCHDR + LOCNAM(buf) + LOCEXT(buf);
2200 }
2201 }
2202 }
2203
2204 // Maxmum number of de/inflater we cache
2205 private final int MAX_FLATER = 20;
2206 // List of available Inflater objects for decompression
2207 private final List<Inflater> inflaters = new ArrayList<>();
2208
2209 // Gets an inflater from the list of available inflaters or allocates
2210 // a new one.
2211 private Inflater getInflater() {
2212 synchronized (inflaters) {
2213 int size = inflaters.size();
2214 if (size > 0) {
2215 return inflaters.remove(size - 1);
2216 } else {
2217 return new Inflater(true);
2218 }
2219 }
2220 }
2221
2222 // Releases the specified inflater to the list of available inflaters.
2223 private void releaseInflater(Inflater inf) {
2224 synchronized (inflaters) {
2225 if (inflaters.size() < MAX_FLATER) {
2226 inf.reset();
2227 inflaters.add(inf);
2228 } else {
2229 inf.end();
2230 }
2231 }
2232 }
2233
2234 // List of available Deflater objects for compression
2235 private final List<Deflater> deflaters = new ArrayList<>();
2236
2237 // Gets a deflater from the list of available deflaters or allocates
2238 // a new one.
2239 private Deflater getDeflater() {
2240 synchronized (deflaters) {
2241 int size = deflaters.size();
2242 if (size > 0) {
2243 return deflaters.remove(size - 1);
2244 } else {
2245 return new Deflater(Deflater.DEFAULT_COMPRESSION, true);
2246 }
2247 }
2248 }
2249
2250 // Releases the specified inflater to the list of available inflaters.
2251 private void releaseDeflater(Deflater def) {
2252 synchronized (deflaters) {
2253 if (deflaters.size() < MAX_FLATER) {
2254 def.reset();
2255 deflaters.add(def);
2256 } else {
2257 def.end();
2258 }
2259 }
2260 }
2261
2262 // End of central directory record
2263 static class END {
2264 // The fields that are commented out below are not used by anyone and write() uses "0"
2265 // int disknum;
2266 // int sdisknum;
2267 // int endsub;
2268 int centot; // 4 bytes
2269 long cenlen; // 4 bytes
2270 long cenoff; // 4 bytes
2271 // int comlen; // comment length
2272 // byte[] comment;
2273
2274 // members of Zip64 end of central directory locator
2275 // int diskNum;
2276 long endpos;
2277 // int disktot;
2278
2279 void write(OutputStream os, long offset, boolean forceEnd64) throws IOException {
2280 boolean hasZip64 = forceEnd64; // false;
2281 long xlen = cenlen;
2282 long xoff = cenoff;
2283 if (xlen >= ZIP64_MINVAL) {
2284 xlen = ZIP64_MINVAL;
2285 hasZip64 = true;
2286 }
2287 if (xoff >= ZIP64_MINVAL) {
2288 xoff = ZIP64_MINVAL;
2289 hasZip64 = true;
2290 }
2291 int count = centot;
2292 if (count >= ZIP64_MINVAL32) {
2293 count = ZIP64_MINVAL32;
2294 hasZip64 = true;
2295 }
2296 if (hasZip64) {
2297 //zip64 end of central directory record
2298 writeInt(os, ZIP64_ENDSIG); // zip64 END record signature
2299 writeLong(os, ZIP64_ENDHDR - 12); // size of zip64 end
2300 writeShort(os, 45); // version made by
2301 writeShort(os, 45); // version needed to extract
2302 writeInt(os, 0); // number of this disk
2303 writeInt(os, 0); // central directory start disk
2304 writeLong(os, centot); // number of directory entries on disk
2305 writeLong(os, centot); // number of directory entries
2306 writeLong(os, cenlen); // length of central directory
2307 writeLong(os, cenoff); // offset of central directory
2308
2309 //zip64 end of central directory locator
2310 writeInt(os, ZIP64_LOCSIG); // zip64 END locator signature
2311 writeInt(os, 0); // zip64 END start disk
2312 writeLong(os, offset); // offset of zip64 END
2313 writeInt(os, 1); // total number of disks (?)
2314 }
2315 writeInt(os, ENDSIG); // END record signature
2316 writeShort(os, 0); // number of this disk
2317 writeShort(os, 0); // central directory start disk
2318 writeShort(os, count); // number of directory entries on disk
2319 writeShort(os, count); // total number of directory entries
2320 writeInt(os, xlen); // length of central directory
2321 writeInt(os, xoff); // offset of central directory
2322 writeShort(os, 0); // zip file comment, not used
2323 }
2324 }
2325
2326 // Internal node that links a "name" to its pos in cen table.
2327 // The node itself can be used as a "key" to lookup itself in
2328 // the HashMap inodes.
2329 static class IndexNode {
2330 byte[] name;
2331 int hashcode; // node is hashable/hashed by its name
2332 boolean isdir;
2333 int pos = -1; // position in cen table, -1 means the
2334 // entry does not exist in zip file
2335 IndexNode child; // first child
2336 IndexNode sibling; // next sibling
2337
2338 IndexNode() {}
2339
2340 IndexNode(byte[] name, boolean isdir) {
2341 name(name);
2342 this.isdir = isdir;
2343 this.pos = -1;
2344 }
2345
2346 IndexNode(byte[] name, int pos) {
2347 name(name);
2348 this.pos = pos;
2349 }
2350
2351 // constructor for initCEN() (1) remove trailing '/' (2) pad leading '/'
2352 IndexNode(byte[] cen, int pos, int nlen) {
2353 int noff = pos + CENHDR;
2354 if (cen[noff + nlen - 1] == '/') {
2355 isdir = true;
2356 nlen--;
2357 }
2358 if (nlen > 0 && cen[noff] == '/') {
2359 name = Arrays.copyOfRange(cen, noff, noff + nlen);
2360 } else {
2361 name = new byte[nlen + 1];
2362 System.arraycopy(cen, noff, name, 1, nlen);
2363 name[0] = '/';
2364 }
2365 name(normalize(name));
2366 this.pos = pos;
2367 }
2368
2369 // Normalize the IndexNode.name field.
2370 private byte[] normalize(byte[] path) {
2371 int len = path.length;
2372 if (len == 0)
2373 return path;
2374 byte prevC = 0;
2375 for (int pathPos = 0; pathPos < len; pathPos++) {
2376 byte c = path[pathPos];
2377 if (c == '/' && prevC == '/')
2378 return normalize(path, pathPos - 1);
2379 prevC = c;
2380 }
2381 if (len > 1 && prevC == '/') {
2382 return Arrays.copyOf(path, len - 1);
2383 }
2384 return path;
2385 }
2386
2387 private byte[] normalize(byte[] path, int off) {
2388 // As we know we have at least one / to trim, we can reduce
2389 // the size of the resulting array
2390 byte[] to = new byte[path.length - 1];
2391 int pathPos = 0;
2392 while (pathPos < off) {
2393 to[pathPos] = path[pathPos];
2394 pathPos++;
2395 }
2396 int toPos = pathPos;
2397 byte prevC = 0;
2398 while (pathPos < path.length) {
2399 byte c = path[pathPos++];
2400 if (c == '/' && prevC == '/')
2401 continue;
2402 to[toPos++] = c;
2403 prevC = c;
2404 }
2405 if (toPos > 1 && to[toPos - 1] == '/')
2406 toPos--;
2407 return (toPos == to.length) ? to : Arrays.copyOf(to, toPos);
2408 }
2409
2410 private static final ThreadLocal<IndexNode> cachedKey = new ThreadLocal<>();
2411
2412 static final IndexNode keyOf(byte[] name) { // get a lookup key;
2413 IndexNode key = cachedKey.get();
2414 if (key == null) {
2415 key = new IndexNode(name, -1);
2416 cachedKey.set(key);
2417 }
2418 return key.as(name);
2419 }
2420
2421 final void name(byte[] name) {
2422 this.name = name;
2423 this.hashcode = Arrays.hashCode(name);
2424 }
2425
2426 final IndexNode as(byte[] name) { // reuse the node, mostly
2427 name(name); // as a lookup "key"
2428 return this;
2429 }
2430
2431 boolean isDir() {
2432 return isdir;
2433 }
2434
2435 @Override
2436 public boolean equals(Object other) {
2437 if (!(other instanceof IndexNode)) {
2438 return false;
2439 }
2440 if (other instanceof ParentLookup) {
2441 return ((ParentLookup)other).equals(this);
2442 }
2443 return Arrays.equals(name, ((IndexNode)other).name);
2444 }
2445
2446 @Override
2447 public int hashCode() {
2448 return hashcode;
2449 }
2450
2451 @Override
2452 public String toString() {
2453 return new String(name) + (isdir ? " (dir)" : " ") + ", index: " + pos;
2454 }
2455 }
2456
2457 static class Entry extends IndexNode implements ZipFileAttributes {
2458 static final int CEN = 1; // entry read from cen
2459 static final int NEW = 2; // updated contents in bytes or file
2460 static final int FILECH = 3; // fch update in "file"
2461 static final int COPY = 4; // copy of a CEN entry
2462
2463 byte[] bytes; // updated content bytes
2464 Path file; // use tmp file to store bytes;
2465 int type = CEN; // default is the entry read from cen
2466
2467 // entry attributes
2468 int version;
2469 int flag;
2470 int posixPerms = -1; // posix permissions
2471 int method = -1; // compression method
2472 long mtime = -1; // last modification time (in DOS time)
2473 long atime = -1; // last access time
2474 long ctime = -1; // create time
2475 long crc = -1; // crc-32 of entry data
2476 long csize = -1; // compressed size of entry data
2477 long size = -1; // uncompressed size of entry data
2478 byte[] extra;
2479
2480 // CEN
2481 // The fields that are commented out below are not used by anyone and write() uses "0"
2482 // int versionMade;
2483 // int disk;
2484 // int attrs;
2485 // long attrsEx;
2486 long locoff;
2487 byte[] comment;
2488
2489 Entry(byte[] name, boolean isdir, int method) {
2490 name(name);
2491 this.isdir = isdir;
2492 this.mtime = this.ctime = this.atime = System.currentTimeMillis();
2493 this.crc = 0;
2494 this.size = 0;
2495 this.csize = 0;
2496 this.method = method;
2497 }
2498
2499 @SuppressWarnings("unchecked")
2500 Entry(byte[] name, int type, boolean isdir, int method, FileAttribute<?>... attrs) {
2501 this(name, isdir, method);
2502 this.type = type;
2503 for (FileAttribute<?> attr : attrs) {
2504 String attrName = attr.name();
2505 if (attrName.equals("posix:permissions")) {
2506 posixPerms = ZipUtils.permsToFlags((Set<PosixFilePermission>)attr.value());
2507 }
2508 }
2509 }
2510
2511 Entry(byte[] name, Path file, int type, FileAttribute<?>... attrs) {
2512 this(name, type, false, METHOD_STORED, attrs);
2513 this.file = file;
2514 }
2515
2516 Entry(Entry e, int type, int compressionMethod) {
2517 this(e, type);
2518 this.method = compressionMethod;
2519 }
2520
2521 Entry(Entry e, int type) {
2522 name(e.name);
2523 this.isdir = e.isdir;
2524 this.version = e.version;
2525 this.ctime = e.ctime;
2526 this.atime = e.atime;
2527 this.mtime = e.mtime;
2528 this.crc = e.crc;
2529 this.size = e.size;
2530 this.csize = e.csize;
2531 this.method = e.method;
2532 this.extra = e.extra;
2533 /*
2534 this.versionMade = e.versionMade;
2535 this.disk = e.disk;
2536 this.attrs = e.attrs;
2537 this.attrsEx = e.attrsEx;
2538 */
2539 this.locoff = e.locoff;
2540 this.comment = e.comment;
2541 this.posixPerms = e.posixPerms;
2542 this.type = type;
2543 }
2544
2545 Entry(ZipFileSystem zipfs, IndexNode inode) throws IOException {
2546 readCEN(zipfs, inode);
2547 }
2548
2549 // Calculates a suitable base for the version number to
2550 // be used for fields version made by/version needed to extract.
2551 // The lower bytes of these 2 byte fields hold the version number
2552 // (value/10 = major; value%10 = minor)
2553 // For different features certain minimum versions apply:
2554 // stored = 10 (1.0), deflated = 20 (2.0), zip64 = 45 (4.5)
2555 private int version(boolean zip64) throws ZipException {
2556 if (zip64) {
2557 return 45;
2558 }
2559 if (method == METHOD_DEFLATED)
2560 return 20;
2561 else if (method == METHOD_STORED)
2562 return 10;
2563 throw new ZipException("unsupported compression method");
2564 }
2565
2566 /**
2567 * Adds information about compatibility of file attribute information
2568 * to a version value.
2569 */
2570 private int versionMadeBy(int version) {
2571 return (posixPerms < 0) ? version :
2572 VERSION_MADE_BY_BASE_UNIX | (version & 0xff);
2573 }
2574
2575 ///////////////////// CEN //////////////////////
2576 private void readCEN(ZipFileSystem zipfs, IndexNode inode) throws IOException {
2577 byte[] cen = zipfs.cen;
2578 int pos = inode.pos;
2579 if (!cenSigAt(cen, pos))
2580 throw new ZipException("invalid CEN header (bad signature)");
2581 version = CENVER(cen, pos);
2582 flag = CENFLG(cen, pos);
2583 method = CENHOW(cen, pos);
2584 mtime = dosToJavaTime(CENTIM(cen, pos));
2585 crc = CENCRC(cen, pos);
2586 csize = CENSIZ(cen, pos);
2587 size = CENLEN(cen, pos);
2588 int nlen = CENNAM(cen, pos);
2589 int elen = CENEXT(cen, pos);
2590 int clen = CENCOM(cen, pos);
2591 /*
2592 versionMade = CENVEM(cen, pos);
2593 disk = CENDSK(cen, pos);
2594 attrs = CENATT(cen, pos);
2595 attrsEx = CENATX(cen, pos);
2596 */
2597 if (CENVEM_FA(cen, pos) == FILE_ATTRIBUTES_UNIX) {
2598 posixPerms = CENATX_PERMS(cen, pos) & 0xFFF; // 12 bits for setuid, setgid, sticky + perms
2599 }
2600 locoff = CENOFF(cen, pos);
2601 pos += CENHDR;
2602 this.name = inode.name;
2603 this.isdir = inode.isdir;
2604 this.hashcode = inode.hashcode;
2605
2606 pos += nlen;
2607 if (elen > 0) {
2608 extra = Arrays.copyOfRange(cen, pos, pos + elen);
2609 pos += elen;
2610 readExtra(zipfs);
2611 }
2612 if (clen > 0) {
2613 comment = Arrays.copyOfRange(cen, pos, pos + clen);
2614 }
2615 }
2616
2617 private int writeCEN(OutputStream os) throws IOException {
2618 long csize0 = csize;
2619 long size0 = size;
2620 long locoff0 = locoff;
2621 int elen64 = 0; // extra for ZIP64
2622 int elenNTFS = 0; // extra for NTFS (a/c/mtime)
2623 int elenEXTT = 0; // extra for Extended Timestamp
2624 boolean foundExtraTime = false; // if time stamp NTFS, EXTT present
2625
2626 byte[] zname = isdir ? toDirectoryPath(name) : name;
2627
2628 // confirm size/length
2629 int nlen = (zname != null) ? zname.length - 1 : 0; // name has [0] as "slash"
2630 int elen = (extra != null) ? extra.length : 0;
2631 int eoff = 0;
2632 int clen = (comment != null) ? comment.length : 0;
2633 if (csize >= ZIP64_MINVAL) {
2634 csize0 = ZIP64_MINVAL;
2635 elen64 += 8; // csize(8)
2636 }
2637 if (size >= ZIP64_MINVAL) {
2638 size0 = ZIP64_MINVAL; // size(8)
2639 elen64 += 8;
2640 }
2641 if (locoff >= ZIP64_MINVAL) {
2642 locoff0 = ZIP64_MINVAL;
2643 elen64 += 8; // offset(8)
2644 }
2645 if (elen64 != 0) {
2646 elen64 += 4; // header and data sz 4 bytes
2647 }
2648 boolean zip64 = (elen64 != 0);
2649 int version0 = version(zip64);
2650 while (eoff + 4 < elen) {
2651 int tag = SH(extra, eoff);
2652 int sz = SH(extra, eoff + 2);
2653 if (tag == EXTID_EXTT || tag == EXTID_NTFS) {
2654 foundExtraTime = true;
2655 }
2656 eoff += (4 + sz);
2657 }
2658 if (!foundExtraTime) {
2659 if (isWindows) { // use NTFS
2660 elenNTFS = 36; // total 36 bytes
2661 } else { // Extended Timestamp otherwise
2662 elenEXTT = 9; // only mtime in cen
2663 }
2664 }
2665 writeInt(os, CENSIG); // CEN header signature
2666 writeShort(os, versionMadeBy(version0)); // version made by
2667 writeShort(os, version0); // version needed to extract
2668 writeShort(os, flag); // general purpose bit flag
2669 writeShort(os, method); // compression method
2670 // last modification time
2671 writeInt(os, (int)javaToDosTime(mtime));
2672 writeInt(os, crc); // crc-32
2673 writeInt(os, csize0); // compressed size
2674 writeInt(os, size0); // uncompressed size
2675 writeShort(os, nlen);
2676 writeShort(os, elen + elen64 + elenNTFS + elenEXTT);
2677
2678 if (comment != null) {
2679 writeShort(os, Math.min(clen, 0xffff));
2680 } else {
2681 writeShort(os, 0);
2682 }
2683 writeShort(os, 0); // starting disk number
2684 writeShort(os, 0); // internal file attributes (unused)
2685 writeInt(os, posixPerms > 0 ? posixPerms << 16 : 0); // external file
2686 // attributes, used for storing posix
2687 // permissions
2688 writeInt(os, locoff0); // relative offset of local header
2689 writeBytes(os, zname, 1, nlen);
2690 if (zip64) {
2691 writeShort(os, EXTID_ZIP64);// Zip64 extra
2692 writeShort(os, elen64 - 4); // size of "this" extra block
2693 if (size0 == ZIP64_MINVAL)
2694 writeLong(os, size);
2695 if (csize0 == ZIP64_MINVAL)
2696 writeLong(os, csize);
2697 if (locoff0 == ZIP64_MINVAL)
2698 writeLong(os, locoff);
2699 }
2700 if (elenNTFS != 0) {
2701 writeShort(os, EXTID_NTFS);
2702 writeShort(os, elenNTFS - 4);
2703 writeInt(os, 0); // reserved
2704 writeShort(os, 0x0001); // NTFS attr tag
2705 writeShort(os, 24);
2706 writeLong(os, javaToWinTime(mtime));
2707 writeLong(os, javaToWinTime(atime));
2708 writeLong(os, javaToWinTime(ctime));
2709 }
2710 if (elenEXTT != 0) {
2711 writeShort(os, EXTID_EXTT);
2712 writeShort(os, elenEXTT - 4);
2713 if (ctime == -1)
2714 os.write(0x3); // mtime and atime
2715 else
2716 os.write(0x7); // mtime, atime and ctime
2717 writeInt(os, javaToUnixTime(mtime));
2718 }
2719 if (extra != null) // whatever not recognized
2720 writeBytes(os, extra);
2721 if (comment != null) //TBD: 0, Math.min(commentBytes.length, 0xffff));
2722 writeBytes(os, comment);
2723 return CENHDR + nlen + elen + clen + elen64 + elenNTFS + elenEXTT;
2724 }
2725
2726 ///////////////////// LOC //////////////////////
2727
2728 private int writeLOC(OutputStream os) throws IOException {
2729 byte[] zname = isdir ? toDirectoryPath(name) : name;
2730 int nlen = (zname != null) ? zname.length - 1 : 0; // [0] is slash
2731 int elen = (extra != null) ? extra.length : 0;
2732 boolean foundExtraTime = false; // if extra timestamp present
2733 int eoff = 0;
2734 int elen64 = 0;
2735 boolean zip64 = false;
2736 int elenEXTT = 0;
2737 int elenNTFS = 0;
2738 writeInt(os, LOCSIG); // LOC header signature
2739 if ((flag & FLAG_DATADESCR) != 0) {
2740 writeShort(os, version(false)); // version needed to extract
2741 writeShort(os, flag); // general purpose bit flag
2742 writeShort(os, method); // compression method
2743 // last modification time
2744 writeInt(os, (int)javaToDosTime(mtime));
2745 // store size, uncompressed size, and crc-32 in data descriptor
2746 // immediately following compressed entry data
2747 writeInt(os, 0);
2748 writeInt(os, 0);
2749 writeInt(os, 0);
2750 } else {
2751 if (csize >= ZIP64_MINVAL || size >= ZIP64_MINVAL) {
2752 elen64 = 20; //headid(2) + size(2) + size(8) + csize(8)
2753 zip64 = true;
2754 }
2755 writeShort(os, version(zip64)); // version needed to extract
2756 writeShort(os, flag); // general purpose bit flag
2757 writeShort(os, method); // compression method
2758 // last modification time
2759 writeInt(os, (int)javaToDosTime(mtime));
2760 writeInt(os, crc); // crc-32
2761 if (zip64) {
2762 writeInt(os, ZIP64_MINVAL);
2763 writeInt(os, ZIP64_MINVAL);
2764 } else {
2765 writeInt(os, csize); // compressed size
2766 writeInt(os, size); // uncompressed size
2767 }
2768 }
2769 while (eoff + 4 < elen) {
2770 int tag = SH(extra, eoff);
2771 int sz = SH(extra, eoff + 2);
2772 if (tag == EXTID_EXTT || tag == EXTID_NTFS) {
2773 foundExtraTime = true;
2774 }
2775 eoff += (4 + sz);
2776 }
2777 if (!foundExtraTime) {
2778 if (isWindows) {
2779 elenNTFS = 36; // NTFS, total 36 bytes
2780 } else { // on unix use "ext time"
2781 elenEXTT = 9;
2782 if (atime != -1)
2783 elenEXTT += 4;
2784 if (ctime != -1)
2785 elenEXTT += 4;
2786 }
2787 }
2788 writeShort(os, nlen);
2789 writeShort(os, elen + elen64 + elenNTFS + elenEXTT);
2790 writeBytes(os, zname, 1, nlen);
2791 if (zip64) {
2792 writeShort(os, EXTID_ZIP64);
2793 writeShort(os, 16);
2794 writeLong(os, size);
2795 writeLong(os, csize);
2796 }
2797 if (elenNTFS != 0) {
2798 writeShort(os, EXTID_NTFS);
2799 writeShort(os, elenNTFS - 4);
2800 writeInt(os, 0); // reserved
2801 writeShort(os, 0x0001); // NTFS attr tag
2802 writeShort(os, 24);
2803 writeLong(os, javaToWinTime(mtime));
2804 writeLong(os, javaToWinTime(atime));
2805 writeLong(os, javaToWinTime(ctime));
2806 }
2807 if (elenEXTT != 0) {
2808 writeShort(os, EXTID_EXTT);
2809 writeShort(os, elenEXTT - 4);// size for the folowing data block
2810 int fbyte = 0x1;
2811 if (atime != -1) // mtime and atime
2812 fbyte |= 0x2;
2813 if (ctime != -1) // mtime, atime and ctime
2814 fbyte |= 0x4;
2815 os.write(fbyte); // flags byte
2816 writeInt(os, javaToUnixTime(mtime));
2817 if (atime != -1)
2818 writeInt(os, javaToUnixTime(atime));
2819 if (ctime != -1)
2820 writeInt(os, javaToUnixTime(ctime));
2821 }
2822 if (extra != null) {
2823 writeBytes(os, extra);
2824 }
2825 return LOCHDR + nlen + elen + elen64 + elenNTFS + elenEXTT;
2826 }
2827
2828 // Data Descriptor
2829 private int writeEXT(OutputStream os) throws IOException {
2830 writeInt(os, EXTSIG); // EXT header signature
2831 writeInt(os, crc); // crc-32
2832 if (csize >= ZIP64_MINVAL || size >= ZIP64_MINVAL) {
2833 writeLong(os, csize);
2834 writeLong(os, size);
2835 return 24;
2836 } else {
2837 writeInt(os, csize); // compressed size
2838 writeInt(os, size); // uncompressed size
2839 return 16;
2840 }
2841 }
2842
2843 // read NTFS, UNIX and ZIP64 data from cen.extra
2844 private void readExtra(ZipFileSystem zipfs) throws IOException {
2845 if (extra == null)
2846 return;
2847 int elen = extra.length;
2848 int off = 0;
2849 int newOff = 0;
2850 while (off + 4 < elen) {
2851 // extra spec: HeaderID+DataSize+Data
2852 int pos = off;
2853 int tag = SH(extra, pos);
2854 int sz = SH(extra, pos + 2);
2855 pos += 4;
2856 if (pos + sz > elen) // invalid data
2857 break;
2858 switch (tag) {
2859 case EXTID_ZIP64 :
2860 if (size == ZIP64_MINVAL) {
2861 if (pos + 8 > elen) // invalid zip64 extra
2862 break; // fields, just skip
2863 size = LL(extra, pos);
2864 pos += 8;
2865 }
2866 if (csize == ZIP64_MINVAL) {
2867 if (pos + 8 > elen)
2868 break;
2869 csize = LL(extra, pos);
2870 pos += 8;
2871 }
2872 if (locoff == ZIP64_MINVAL) {
2873 if (pos + 8 > elen)
2874 break;
2875 locoff = LL(extra, pos);
2876 }
2877 break;
2878 case EXTID_NTFS:
2879 if (sz < 32)
2880 break;
2881 pos += 4; // reserved 4 bytes
2882 if (SH(extra, pos) != 0x0001)
2883 break;
2884 if (SH(extra, pos + 2) != 24)
2885 break;
2886 // override the loc field, datatime here is
2887 // more "accurate"
2888 mtime = winToJavaTime(LL(extra, pos + 4));
2889 atime = winToJavaTime(LL(extra, pos + 12));
2890 ctime = winToJavaTime(LL(extra, pos + 20));
2891 break;
2892 case EXTID_EXTT:
2893 // spec says the Extened timestamp in cen only has mtime
2894 // need to read the loc to get the extra a/ctime, if flag
2895 // "zipinfo-time" is not specified to false;
2896 // there is performance cost (move up to loc and read) to
2897 // access the loc table foreach entry;
2898 if (zipfs.noExtt) {
2899 if (sz == 5)
2900 mtime = unixToJavaTime(LG(extra, pos + 1));
2901 break;
2902 }
2903 byte[] buf = new byte[LOCHDR];
2904 if (zipfs.readFullyAt(buf, 0, buf.length , locoff)
2905 != buf.length)
2906 throw new ZipException("loc: reading failed");
2907 if (!locSigAt(buf, 0))
2908 throw new ZipException("loc: wrong sig ->"
2909 + Long.toString(getSig(buf, 0), 16));
2910 int locElen = LOCEXT(buf);
2911 if (locElen < 9) // EXTT is at least 9 bytes
2912 break;
2913 int locNlen = LOCNAM(buf);
2914 buf = new byte[locElen];
2915 if (zipfs.readFullyAt(buf, 0, buf.length , locoff + LOCHDR + locNlen)
2916 != buf.length)
2917 throw new ZipException("loc extra: reading failed");
2918 int locPos = 0;
2919 while (locPos + 4 < buf.length) {
2920 int locTag = SH(buf, locPos);
2921 int locSZ = SH(buf, locPos + 2);
2922 locPos += 4;
2923 if (locTag != EXTID_EXTT) {
2924 locPos += locSZ;
2925 continue;
2926 }
2927 int end = locPos + locSZ - 4;
2928 int flag = CH(buf, locPos++);
2929 if ((flag & 0x1) != 0 && locPos <= end) {
2930 mtime = unixToJavaTime(LG(buf, locPos));
2931 locPos += 4;
2932 }
2933 if ((flag & 0x2) != 0 && locPos <= end) {
2934 atime = unixToJavaTime(LG(buf, locPos));
2935 locPos += 4;
2936 }
2937 if ((flag & 0x4) != 0 && locPos <= end) {
2938 ctime = unixToJavaTime(LG(buf, locPos));
2939 }
2940 break;
2941 }
2942 break;
2943 default: // unknown tag
2944 System.arraycopy(extra, off, extra, newOff, sz + 4);
2945 newOff += (sz + 4);
2946 }
2947 off += (sz + 4);
2948 }
2949 if (newOff != 0 && newOff != extra.length)
2950 extra = Arrays.copyOf(extra, newOff);
2951 else
2952 extra = null;
2953 }
2954
2955 @Override
2956 public String toString() {
2957 StringBuilder sb = new StringBuilder(1024);
2958 Formatter fm = new Formatter(sb);
2959 fm.format(" name : %s%n", new String(name));
2960 fm.format(" creationTime : %tc%n", creationTime().toMillis());
2961 fm.format(" lastAccessTime : %tc%n", lastAccessTime().toMillis());
2962 fm.format(" lastModifiedTime: %tc%n", lastModifiedTime().toMillis());
2963 fm.format(" isRegularFile : %b%n", isRegularFile());
2964 fm.format(" isDirectory : %b%n", isDirectory());
2965 fm.format(" isSymbolicLink : %b%n", isSymbolicLink());
2966 fm.format(" isOther : %b%n", isOther());
2967 fm.format(" fileKey : %s%n", fileKey());
2968 fm.format(" size : %d%n", size());
2969 fm.format(" compressedSize : %d%n", compressedSize());
2970 fm.format(" crc : %x%n", crc());
2971 fm.format(" method : %d%n", method());
2972 Set<PosixFilePermission> permissions = storedPermissions().orElse(null);
2973 if (permissions != null) {
2974 fm.format(" permissions : %s%n", permissions);
2975 }
2976 fm.close();
2977 return sb.toString();
2978 }
2979
2980 ///////// basic file attributes ///////////
2981 @Override
2982 public FileTime creationTime() {
2983 return FileTime.fromMillis(ctime == -1 ? mtime : ctime);
2984 }
2985
2986 @Override
2987 public boolean isDirectory() {
2988 return isDir();
2989 }
2990
2991 @Override
2992 public boolean isOther() {
2993 return false;
2994 }
2995
2996 @Override
2997 public boolean isRegularFile() {
2998 return !isDir();
2999 }
3000
3001 @Override
3002 public FileTime lastAccessTime() {
3003 return FileTime.fromMillis(atime == -1 ? mtime : atime);
3004 }
3005
3006 @Override
3007 public FileTime lastModifiedTime() {
3008 return FileTime.fromMillis(mtime);
3009 }
3010
3011 @Override
3012 public long size() {
3013 return size;
3014 }
3015
3016 @Override
3017 public boolean isSymbolicLink() {
3018 return false;
3019 }
3020
3021 @Override
3022 public Object fileKey() {
3023 return null;
3024 }
3025
3026 ///////// zip file attributes ///////////
3027
3028 @Override
3029 public long compressedSize() {
3030 return csize;
3031 }
3032
3033 @Override
3034 public long crc() {
3035 return crc;
3036 }
3037
3038 @Override
3039 public int method() {
3040 return method;
3041 }
3042
3043 @Override
3044 public byte[] extra() {
3045 if (extra != null)
3046 return Arrays.copyOf(extra, extra.length);
3047 return null;
3048 }
3049
3050 @Override
3051 public byte[] comment() {
3052 if (comment != null)
3053 return Arrays.copyOf(comment, comment.length);
3054 return null;
3055 }
3056
3057 @Override
3058 public Optional<Set<PosixFilePermission>> storedPermissions() {
3059 Set<PosixFilePermission> perms = null;
3060 if (posixPerms != -1) {
3061 perms = new HashSet<>(PosixFilePermission.values().length);
3062 for (PosixFilePermission perm : PosixFilePermission.values()) {
3063 if ((posixPerms & ZipUtils.permToFlag(perm)) != 0) {
3064 perms.add(perm);
3065 }
3066 }
3067 }
3068 return Optional.ofNullable(perms);
3069 }
3070 }
3071
3072 final class PosixEntry extends Entry implements PosixFileAttributes {
3073 private UserPrincipal owner = defaultOwner;
3074 private GroupPrincipal group = defaultGroup;
3075
3076 PosixEntry(byte[] name, boolean isdir, int method) {
3077 super(name, isdir, method);
3078 }
3079
3080 PosixEntry(byte[] name, int type, boolean isdir, int method, FileAttribute<?>... attrs) {
3081 super(name, type, isdir, method, attrs);
3082 }
3083
3084 PosixEntry(byte[] name, Path file, int type, FileAttribute<?>... attrs) {
3085 super(name, file, type, attrs);
3086 }
3087
3088 PosixEntry(PosixEntry e, int type, int compressionMethod) {
3089 super(e, type);
3090 this.method = compressionMethod;
3091 }
3092
3093 PosixEntry(PosixEntry e, int type) {
3094 super(e, type);
3095 this.owner = e.owner;
3096 this.group = e.group;
3097 }
3098
3099 PosixEntry(ZipFileSystem zipfs, IndexNode inode) throws IOException {
3100 super(zipfs, inode);
3101 }
3102
3103 @Override
3104 public UserPrincipal owner() {
3105 return owner;
3106 }
3107
3108 @Override
3109 public GroupPrincipal group() {
3110 return group;
3111 }
3112
3113 @Override
3114 public Set<PosixFilePermission> permissions() {
3115 return storedPermissions().orElse(Set.copyOf(defaultPermissions));
3116 }
3117 }
3118
3119 // purely for parent lookup, so we don't have to copy the parent
3120 // name every time
3121 static class ParentLookup extends IndexNode {
3122 int len;
3123 ParentLookup() {}
3124
3125 final ParentLookup as(byte[] name, int len) { // as a lookup "key"
3126 name(name, len);
3127 return this;
3128 }
3129
3130 void name(byte[] name, int len) {
3131 this.name = name;
3132 this.len = len;
3133 // calculate the hashcode the same way as Arrays.hashCode() does
3134 int result = 1;
3135 for (int i = 0; i < len; i++)
3136 result = 31 * result + name[i];
3137 this.hashcode = result;
3138 }
3139
3140 @Override
3141 public boolean equals(Object other) {
3142 if (!(other instanceof IndexNode)) {
3143 return false;
3144 }
3145 byte[] oname = ((IndexNode)other).name;
3146 return Arrays.equals(name, 0, len,
3147 oname, 0, oname.length);
3148 }
3149 }
3150 }