1 /*
2 * Copyright (c) 2009, 2014, 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.IOException;
29 import java.io.OutputStream;
30 import java.time.DateTimeException;
31 import java.time.Instant;
32 import java.time.LocalDateTime;
33 import java.time.ZoneId;
34 import java.util.Arrays;
35 import java.util.Date;
36 import java.util.regex.PatternSyntaxException;
37 import java.util.concurrent.TimeUnit;
38
39 /**
40 *
41 * @author Xueming Shen
42 */
43
44 class ZipUtils {
45
46 /*
47 * Writes a 16-bit short to the output stream in little-endian byte order.
48 */
49 public static void writeShort(OutputStream os, int v) throws IOException {
50 os.write(v & 0xff);
51 os.write((v >>> 8) & 0xff);
52 }
53
54 /*
55 * Writes a 32-bit int to the output stream in little-endian byte order.
56 */
57 public static void writeInt(OutputStream os, long v) throws IOException {
58 os.write((int)(v & 0xff));
59 os.write((int)((v >>> 8) & 0xff));
60 os.write((int)((v >>> 16) & 0xff));
61 os.write((int)((v >>> 24) & 0xff));
62 }
63
64 /*
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1 /*
2 * Copyright (c) 2009, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.nio.zipfs;
27
28 import java.io.IOException;
29 import java.io.OutputStream;
30 import java.nio.file.attribute.PosixFilePermission;
31 import java.time.DateTimeException;
32 import java.time.Instant;
33 import java.time.LocalDateTime;
34 import java.time.ZoneId;
35 import java.util.Arrays;
36 import java.util.Collections;
37 import java.util.Date;
38 import java.util.HashSet;
39 import java.util.Map;
40 import java.util.Set;
41 import java.util.WeakHashMap;
42 import java.util.concurrent.TimeUnit;
43 import java.util.regex.PatternSyntaxException;
44 import java.util.stream.Collectors;
45 import java.util.stream.Stream;
46
47 /**
48 * @author Xueming Shen
49 */
50 class ZipUtils {
51
52 /**
53 * The value indicating unix file attributes in CEN field "version made by".
54 */
55 static final int FILE_ATTRIBUTES_UNIX = 3;
56
57 /**
58 * Constant used to calculate "version made by".
59 */
60 static final int VERSION_BASE_UNIX = FILE_ATTRIBUTES_UNIX << 8;
61
62 /**
63 * The bit flag used to specify read permission by the owner.
64 */
65 static final int POSIX_USER_READ = 0400;
66
67 /**
68 * The bit flag used to specify write permission by the owner.
69 */
70 static final int POSIX_USER_WRITE = 0200;
71
72 /**
73 * The bit flag used to specify execute permission by the owner.
74 */
75 static final int POSIX_USER_EXECUTE = 0100;
76
77 /**
78 * The bit flag used to specify read permission by the group.
79 */
80 static final int POSIX_GROUP_READ = 040;
81
82 /**
83 * The bit flag used to specify write permission by the group.
84 */
85 static final int POSIX_GROUP_WRITE = 020;
86
87 /**
88 * The bit flag used to specify execute permission by the group.
89 */
90 static final int POSIX_GROUP_EXECUTE = 010;
91
92 /**
93 * The bit flag used to specify read permission by others.
94 */
95 static final int POSIX_OTHER_READ = 04;
96
97 /**
98 * The bit flag used to specify write permission by others.
99 */
100 static final int POSIX_OTHER_WRITE = 02;
101
102 /**
103 * The bit flag used to specify execute permission by others.
104 */
105 static final int POSIX_OTHER_EXECUTE = 01;
106
107 /**
108 * This weak hashmap contains pre-calculated permission sets.
109 */
110 private static final Map<Integer,Set<PosixFilePermission>> permCache = new WeakHashMap<>();
111
112 /**
113 * Convert a {@link PosixFilePermission} object into the appropriate bit
114 * flag.
115 *
116 * @param perm The {@link PosixFilePermission} object.
117 * @return The bit flag as int.
118 */
119 private static int permToFlag(PosixFilePermission perm) {
120 switch(perm) {
121 case OWNER_READ:
122 return POSIX_USER_READ;
123 case OWNER_WRITE:
124 return POSIX_USER_WRITE;
125 case OWNER_EXECUTE:
126 return POSIX_USER_EXECUTE;
127 case GROUP_READ:
128 return POSIX_GROUP_READ;
129 case GROUP_WRITE:
130 return POSIX_GROUP_WRITE;
131 case GROUP_EXECUTE:
132 return POSIX_GROUP_EXECUTE;
133 case OTHERS_READ:
134 return POSIX_OTHER_READ;
135 case OTHERS_WRITE:
136 return POSIX_OTHER_WRITE;
137 case OTHERS_EXECUTE:
138 return POSIX_OTHER_EXECUTE;
139 default:
140 return 0;
141 }
142 }
143
144 /**
145 * Converts a set of {@link PosixFilePermission}s into an int value where
146 * the according bits are set.
147 *
148 * @param perms A Set of {@link PosixFilePermission} objects.
149 *
150 * @return A bit mask representing the input Set.
151 */
152 static int permsToFlags(Set<PosixFilePermission> perms) {
153 if (perms == null) {
154 return -1;
155 }
156 int flags = 0;
157 for (PosixFilePermission perm : perms) {
158 flags |= permToFlag(perm);
159 }
160 return flags;
161 }
162
163 /**
164 * Converts a bit mask of Posix file permissions into a set of
165 * {@link PosixFilePermission} objects.
166 *
167 * @param flags The bit mask containing the flags.
168 *
169 * @return A set of {@link PosixFilePermission} objects matching the input
170 * flags.
171 */
172 static Set<PosixFilePermission> permsFromFlags(int flags) {
173 if (flags == 0) {
174 return Collections.<PosixFilePermission>emptySet();
175 }
176 Set<PosixFilePermission> perms = permCache.get(flags);
177 if (perms == null) {
178 perms = Stream.of(PosixFilePermission.values())
179 .filter(perm -> 0 != (flags & permToFlag(perm)))
180 .collect(Collectors.toSet());
181 permCache.put(flags, perms);
182 }
183 return new HashSet<>(perms);
184 }
185
186 /*
187 * Writes a 16-bit short to the output stream in little-endian byte order.
188 */
189 public static void writeShort(OutputStream os, int v) throws IOException {
190 os.write(v & 0xff);
191 os.write((v >>> 8) & 0xff);
192 }
193
194 /*
195 * Writes a 32-bit int to the output stream in little-endian byte order.
196 */
197 public static void writeInt(OutputStream os, long v) throws IOException {
198 os.write((int)(v & 0xff));
199 os.write((int)((v >>> 8) & 0xff));
200 os.write((int)((v >>> 16) & 0xff));
201 os.write((int)((v >>> 24) & 0xff));
202 }
203
204 /*
|