1 /*
2 * Copyright (c) 1998, 2010, 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 /*
27 * Native method support for java.util.zip.ZipFile
28 */
29
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <errno.h>
34 #include <ctype.h>
35 #include <assert.h>
36 #include "jlong.h"
37 #include "jvm.h"
38 #include "jni.h"
39 #include "jni_util.h"
40 #include "zip_util.h"
41 #ifdef WIN32
42 #include "io_util_md.h"
43 #else
44 #include "io_util.h"
45 #endif
46
47 #include "java_util_zip_ZipFile.h"
48 #include "java_util_jar_JarFile.h"
49
50 #define DEFLATED 8
51 #define STORED 0
52
53 static jfieldID jzfileID;
54
55 static int OPEN_READ = java_util_zip_ZipFile_OPEN_READ;
56 static int OPEN_DELETE = java_util_zip_ZipFile_OPEN_DELETE;
57
58 JNIEXPORT void JNICALL
59 Java_java_util_zip_ZipFile_initIDs(JNIEnv *env, jclass cls)
60 {
61 jzfileID = (*env)->GetFieldID(env, cls, "jzfile", "J");
62 assert(jzfileID != 0);
63 }
64
65 static void
66 ThrowZipException(JNIEnv *env, const char *msg)
67 {
68 jstring s = NULL;
69 jobject x;
70
71 if (msg != NULL) {
72 s = JNU_NewStringPlatform(env, msg);
73 }
74 x = JNU_NewObjectByName(env,
75 "java/util/zip/ZipException",
76 "(Ljava/lang/String;)V", s);
77 if (x != NULL) {
78 (*env)->Throw(env, x);
79 }
80 }
81
82 JNIEXPORT jlong JNICALL
83 Java_java_util_zip_ZipFile_open(JNIEnv *env, jclass cls, jstring name,
84 jint mode, jlong lastModified,
85 jboolean usemmap)
86 {
87 const char *path = JNU_GetStringPlatformChars(env, name, 0);
88 char *msg = 0;
89 jlong result = 0;
90 int flag = 0;
91 jzfile *zip = 0;
92
93 if (mode & OPEN_READ) flag |= O_RDONLY;
94 if (mode & OPEN_DELETE) flag |= JVM_O_DELETE;
95
96 if (path != 0) {
97 zip = ZIP_Get_From_Cache(path, &msg, lastModified);
98 if (zip == 0 && msg == 0) {
99 ZFILE zfd = 0;
100 #ifdef WIN32
101 zfd = winFileHandleOpen(env, name, flag);
102 if (zfd == -1) {
103 /* Exception already pending. */
104 goto finally;
105 }
106 #else
107 zfd = JVM_Open(path, flag, 0);
108 if (zfd < 0) {
109 throwFileNotFoundException(env, name);
110 goto finally;
111 }
112 #endif
113 zip = ZIP_Put_In_Cache0(path, zfd, &msg, lastModified, usemmap);
114 }
115
116 if (zip != 0) {
117 result = ptr_to_jlong(zip);
118 } else if (msg != 0) {
119 ThrowZipException(env, msg);
120 } else if (errno == ENOMEM) {
121 JNU_ThrowOutOfMemoryError(env, 0);
122 } else {
123 ThrowZipException(env, "error in opening zip file");
124 }
125 finally:
126 JNU_ReleaseStringPlatformChars(env, name, path);
127 }
128 return result;
129 }
130
131 JNIEXPORT jint JNICALL
132 Java_java_util_zip_ZipFile_getTotal(JNIEnv *env, jclass cls, jlong zfile)
133 {
134 jzfile *zip = jlong_to_ptr(zfile);
135
136 return zip->total;
137 }
138
139 JNIEXPORT void JNICALL
140 Java_java_util_zip_ZipFile_close(JNIEnv *env, jclass cls, jlong zfile)
141 {
142 ZIP_Close(jlong_to_ptr(zfile));
143 }
144
145 JNIEXPORT jlong JNICALL
146 Java_java_util_zip_ZipFile_getEntry(JNIEnv *env, jclass cls, jlong zfile,
147 jbyteArray name, jboolean addSlash)
148 {
149 #define MAXNAME 1024
150 jzfile *zip = jlong_to_ptr(zfile);
151 jsize ulen = (*env)->GetArrayLength(env, name);
152 char buf[MAXNAME+2], *path;
153 jzentry *ze;
154
155 if (ulen > MAXNAME) {
156 path = malloc(ulen + 2);
157 if (path == 0) {
158 JNU_ThrowOutOfMemoryError(env, 0);
159 return 0;
160 }
161 } else {
162 path = buf;
163 }
164 (*env)->GetByteArrayRegion(env, name, 0, ulen, (jbyte *)path);
165 path[ulen] = '\0';
166 if (addSlash == JNI_FALSE) {
167 ze = ZIP_GetEntry(zip, path, 0);
168 } else {
169 ze = ZIP_GetEntry(zip, path, (jint)ulen);
170 }
171 if (path != buf) {
172 free(path);
173 }
174 return ptr_to_jlong(ze);
175 }
176
177 JNIEXPORT void JNICALL
178 Java_java_util_zip_ZipFile_freeEntry(JNIEnv *env, jclass cls, jlong zfile,
179 jlong zentry)
180 {
181 jzfile *zip = jlong_to_ptr(zfile);
182 jzentry *ze = jlong_to_ptr(zentry);
183 ZIP_FreeEntry(zip, ze);
184 }
185
186 JNIEXPORT jlong JNICALL
187 Java_java_util_zip_ZipFile_getNextEntry(JNIEnv *env, jclass cls, jlong zfile,
188 jint n)
189 {
190 jzentry *ze = ZIP_GetNextEntry(jlong_to_ptr(zfile), n);
191 return ptr_to_jlong(ze);
192 }
193
194 JNIEXPORT jint JNICALL
195 Java_java_util_zip_ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry)
196 {
197 jzentry *ze = jlong_to_ptr(zentry);
198 return ze->csize != 0 ? DEFLATED : STORED;
199 }
200
201 JNIEXPORT jint JNICALL
202 Java_java_util_zip_ZipFile_getEntryFlag(JNIEnv *env, jclass cls, jlong zentry)
203 {
204 jzentry *ze = jlong_to_ptr(zentry);
205 return ze->flag;
206 }
207
208 JNIEXPORT jlong JNICALL
209 Java_java_util_zip_ZipFile_getEntryCSize(JNIEnv *env, jclass cls, jlong zentry)
210 {
211 jzentry *ze = jlong_to_ptr(zentry);
212 return ze->csize != 0 ? ze->csize : ze->size;
213 }
214
215 JNIEXPORT jlong JNICALL
216 Java_java_util_zip_ZipFile_getEntrySize(JNIEnv *env, jclass cls, jlong zentry)
217 {
218 jzentry *ze = jlong_to_ptr(zentry);
219 return ze->size;
220 }
221
222 JNIEXPORT jlong JNICALL
223 Java_java_util_zip_ZipFile_getEntryTime(JNIEnv *env, jclass cls, jlong zentry)
224 {
225 jzentry *ze = jlong_to_ptr(zentry);
226 return (jlong)ze->time & 0xffffffffUL;
227 }
228
229 JNIEXPORT jlong JNICALL
230 Java_java_util_zip_ZipFile_getEntryCrc(JNIEnv *env, jclass cls, jlong zentry)
231 {
232 jzentry *ze = jlong_to_ptr(zentry);
233 return (jlong)ze->crc & 0xffffffffUL;
234 }
235
236 JNIEXPORT jbyteArray JNICALL
237 Java_java_util_zip_ZipFile_getCommentBytes(JNIEnv *env,
238 jclass cls,
239 jlong zfile)
240 {
241 jzfile *zip = jlong_to_ptr(zfile);
242 jbyteArray jba = NULL;
243
244 if (zip->comment != NULL) {
245 if ((jba = (*env)->NewByteArray(env, zip->clen)) == NULL)
246 return NULL;
247 (*env)->SetByteArrayRegion(env, jba, 0, zip->clen, (jbyte*)zip->comment);
248 }
249 return jba;
250 }
251
252 JNIEXPORT jbyteArray JNICALL
253 Java_java_util_zip_ZipFile_getEntryBytes(JNIEnv *env,
254 jclass cls,
255 jlong zentry, jint type)
256 {
257 jzentry *ze = jlong_to_ptr(zentry);
258 int len = 0;
259 jbyteArray jba = NULL;
260 switch (type) {
261 case java_util_zip_ZipFile_JZENTRY_NAME:
262 if (ze->name != 0) {
263 len = (int)strlen(ze->name);
264 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
265 break;
266 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte *)ze->name);
267 }
268 break;
269 case java_util_zip_ZipFile_JZENTRY_EXTRA:
270 if (ze->extra != 0) {
271 unsigned char *bp = (unsigned char *)&ze->extra[0];
272 len = (bp[0] | (bp[1] << 8));
273 if (len <= 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
274 break;
275 (*env)->SetByteArrayRegion(env, jba, 0, len, &ze->extra[2]);
276 }
277 break;
278 case java_util_zip_ZipFile_JZENTRY_COMMENT:
279 if (ze->comment != 0) {
280 len = (int)strlen(ze->comment);
281 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
282 break;
283 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte*)ze->comment);
284 }
285 break;
286 }
287 return jba;
288 }
289
290 JNIEXPORT jint JNICALL
291 Java_java_util_zip_ZipFile_read(JNIEnv *env, jclass cls, jlong zfile,
292 jlong zentry, jlong pos, jbyteArray bytes,
293 jint off, jint len)
294 {
295 jzfile *zip = jlong_to_ptr(zfile);
296 char *msg;
297
298 #define BUFSIZE 8192
299 /* copy via tmp stack buffer: */
300 jbyte buf[BUFSIZE];
301
302 if (len > BUFSIZE) {
303 len = BUFSIZE;
304 }
305
306 ZIP_Lock(zip);
307 len = ZIP_Read(zip, jlong_to_ptr(zentry), pos, buf, len);
308 msg = zip->msg;
309 ZIP_Unlock(zip);
310 if (len != -1) {
311 (*env)->SetByteArrayRegion(env, bytes, off, len, buf);
312 }
313
314 if (len == -1) {
315 if (msg != 0) {
316 ThrowZipException(env, msg);
317 } else {
318 char errmsg[128];
319 sprintf(errmsg, "errno: %d, error: %s\n",
320 errno, "Error reading ZIP file");
321 JNU_ThrowIOExceptionWithLastError(env, errmsg);
322 }
323 }
324
325 return len;
326 }
327
328 /*
329 * Returns an array of strings representing the names of all entries
330 * that begin with "META-INF/" (case ignored). This native method is
331 * used in JarFile as an optimization when looking up manifest and
332 * signature file entries. Returns null if no entries were found.
333 */
334 JNIEXPORT jobjectArray JNICALL
335 Java_java_util_jar_JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj)
336 {
337 jlong zfile = (*env)->GetLongField(env, obj, jzfileID);
338 jzfile *zip;
339 int i, count;
340 jobjectArray result = 0;
341
342 if (zfile == 0) {
343 JNU_ThrowByName(env,
344 "java/lang/IllegalStateException", "zip file closed");
345 return NULL;
346 }
347 zip = jlong_to_ptr(zfile);
348
349 /* count the number of valid ZIP metanames */
350 count = 0;
351 if (zip->metanames != 0) {
352 for (i = 0; i < zip->metacount; i++) {
353 if (zip->metanames[i] != 0) {
354 count++;
355 }
356 }
357 }
358
359 /* If some names were found then build array of java strings */
360 if (count > 0) {
361 jclass cls = (*env)->FindClass(env, "java/lang/String");
362 result = (*env)->NewObjectArray(env, count, cls, 0);
363 if (result != 0) {
364 for (i = 0; i < count; i++) {
365 jstring str = (*env)->NewStringUTF(env, zip->metanames[i]);
366 if (str == 0) {
367 break;
368 }
369 (*env)->SetObjectArrayElement(env, result, i, str);
370 (*env)->DeleteLocalRef(env, str);
371 }
372 }
373 }
374 return result;
375 }
376
377 JNIEXPORT jstring JNICALL
378 Java_java_util_zip_ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile)
379 {
380 jzfile *zip = jlong_to_ptr(zfile);
381 char *msg = zip->msg;
382 if (msg == NULL) {
383 return NULL;
384 }
385 return JNU_NewStringPlatform(env, msg);
386 }