1 /*
2 * Copyright 1998-2006 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any 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 {
86 const char *path = JNU_GetStringPlatformChars(env, name, 0);
87 char *msg = 0;
88 jlong result = 0;
89 int flag = 0;
90 jzfile *zip = 0;
91
92 if (mode & OPEN_READ) flag |= O_RDONLY;
93 if (mode & OPEN_DELETE) flag |= JVM_O_DELETE;
94
95 if (path != 0) {
96 zip = ZIP_Get_From_Cache(path, &msg, lastModified);
97 if (zip == 0 && msg == 0) {
98 ZFILE zfd = 0;
99 #ifdef WIN32
100 zfd = winFileHandleOpen(env, name, flag);
101 if (zfd == -1) {
102 /* Exception already pending. */
103 goto finally;
104 }
105 #else
106 zfd = JVM_Open(path, flag, 0);
107 if (zfd < 0) {
108 throwFileNotFoundException(env, name);
109 goto finally;
110 }
111 #endif
112 zip = ZIP_Put_In_Cache(path, zfd, &msg, lastModified);
113 }
114
115 if (zip != 0) {
116 result = ptr_to_jlong(zip);
117 } else if (msg != 0) {
118 ThrowZipException(env, msg);
119 } else if (errno == ENOMEM) {
120 JNU_ThrowOutOfMemoryError(env, 0);
121 } else {
122 ThrowZipException(env, "error in opening zip file");
123 }
124 finally:
125 JNU_ReleaseStringPlatformChars(env, name, path);
126 }
127 return result;
128 }
129
130 JNIEXPORT jint JNICALL
131 Java_java_util_zip_ZipFile_getTotal(JNIEnv *env, jclass cls, jlong zfile)
132 {
133 jzfile *zip = jlong_to_ptr(zfile);
134
135 return zip->total;
136 }
137
138 JNIEXPORT void JNICALL
139 Java_java_util_zip_ZipFile_close(JNIEnv *env, jclass cls, jlong zfile)
140 {
141 ZIP_Close(jlong_to_ptr(zfile));
142 }
143
144 JNIEXPORT jlong JNICALL
145 Java_java_util_zip_ZipFile_getEntry(JNIEnv *env, jclass cls, jlong zfile,
146 jbyteArray name, jboolean addSlash)
147 {
148 #define MAXNAME 1024
149 jzfile *zip = jlong_to_ptr(zfile);
150 jsize ulen = (*env)->GetArrayLength(env, name);
151 char buf[MAXNAME+2], *path;
152 jzentry *ze;
153
154 if (ulen > MAXNAME) {
155 path = malloc(ulen + 2);
156 if (path == 0) {
157 JNU_ThrowOutOfMemoryError(env, 0);
158 return 0;
159 }
160 } else {
161 path = buf;
162 }
163 (*env)->GetByteArrayRegion(env, name, 0, ulen, (jbyte *)path);
164 path[ulen] = '\0';
165 if (addSlash == JNI_FALSE) {
166 ze = ZIP_GetEntry(zip, path, 0);
167 } else {
168 ze = ZIP_GetEntry(zip, path, (jint)ulen);
169 }
170 if (path != buf) {
171 free(path);
172 }
173 return ptr_to_jlong(ze);
174 }
175
176 JNIEXPORT void JNICALL
177 Java_java_util_zip_ZipFile_freeEntry(JNIEnv *env, jclass cls, jlong zfile,
178 jlong zentry)
179 {
180 jzfile *zip = jlong_to_ptr(zfile);
181 jzentry *ze = jlong_to_ptr(zentry);
182 ZIP_FreeEntry(zip, ze);
183 }
184
185 JNIEXPORT jlong JNICALL
186 Java_java_util_zip_ZipFile_getNextEntry(JNIEnv *env, jclass cls, jlong zfile,
187 jint n)
188 {
189 jzentry *ze = ZIP_GetNextEntry(jlong_to_ptr(zfile), n);
190 return ptr_to_jlong(ze);
191 }
192
193 JNIEXPORT jint JNICALL
194 Java_java_util_zip_ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry)
195 {
196 jzentry *ze = jlong_to_ptr(zentry);
197 return ze->csize != 0 ? DEFLATED : STORED;
198 }
199
200 JNIEXPORT jint JNICALL
201 Java_java_util_zip_ZipFile_getEntryFlag(JNIEnv *env, jclass cls, jlong zentry)
202 {
203 jzentry *ze = jlong_to_ptr(zentry);
204 return ze->flag;
205 }
206
207 JNIEXPORT jlong JNICALL
208 Java_java_util_zip_ZipFile_getEntryCSize(JNIEnv *env, jclass cls, jlong zentry)
209 {
210 jzentry *ze = jlong_to_ptr(zentry);
211 return ze->csize != 0 ? ze->csize : ze->size;
212 }
213
214 JNIEXPORT jlong JNICALL
215 Java_java_util_zip_ZipFile_getEntrySize(JNIEnv *env, jclass cls, jlong zentry)
216 {
217 jzentry *ze = jlong_to_ptr(zentry);
218 return ze->size;
219 }
220
221 JNIEXPORT jlong JNICALL
222 Java_java_util_zip_ZipFile_getEntryTime(JNIEnv *env, jclass cls, jlong zentry)
223 {
224 jzentry *ze = jlong_to_ptr(zentry);
225 return (jlong)ze->time & 0xffffffffUL;
226 }
227
228 JNIEXPORT jlong JNICALL
229 Java_java_util_zip_ZipFile_getEntryCrc(JNIEnv *env, jclass cls, jlong zentry)
230 {
231 jzentry *ze = jlong_to_ptr(zentry);
232 return (jlong)ze->crc & 0xffffffffUL;
233 }
234
235 JNIEXPORT jbyteArray JNICALL
236 Java_java_util_zip_ZipFile_getCommentBytes(JNIEnv *env,
237 jclass cls,
238 jlong zfile)
239 {
240 jzfile *zip = jlong_to_ptr(zfile);
241 jbyteArray jba = NULL;
242
243 if (zip->comment != NULL) {
244 if ((jba = (*env)->NewByteArray(env, zip->clen)) == NULL)
245 return NULL;
246 (*env)->SetByteArrayRegion(env, jba, 0, zip->clen, (jbyte*)zip->comment);
247 }
248 return jba;
249 }
250
251 JNIEXPORT jbyteArray JNICALL
252 Java_java_util_zip_ZipFile_getEntryBytes(JNIEnv *env,
253 jclass cls,
254 jlong zentry, jint type)
255 {
256 jzentry *ze = jlong_to_ptr(zentry);
257 int len = 0;
258 jbyteArray jba = NULL;
259 switch (type) {
260 case java_util_zip_ZipFile_JZENTRY_NAME:
261 if (ze->name != 0) {
262 len = (int)strlen(ze->name);
263 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
264 break;
265 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte *)ze->name);
266 }
267 break;
268 case java_util_zip_ZipFile_JZENTRY_EXTRA:
269 if (ze->extra != 0) {
270 unsigned char *bp = (unsigned char *)&ze->extra[0];
271 len = (bp[0] | (bp[1] << 8));
272 if (len <= 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
273 break;
274 (*env)->SetByteArrayRegion(env, jba, 0, len, &ze->extra[2]);
275 }
276 break;
277 case java_util_zip_ZipFile_JZENTRY_COMMENT:
278 if (ze->comment != 0) {
279 len = (int)strlen(ze->comment);
280 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
281 break;
282 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte*)ze->comment);
283 }
284 break;
285 }
286 return jba;
287 }
288
289 JNIEXPORT jint JNICALL
290 Java_java_util_zip_ZipFile_read(JNIEnv *env, jclass cls, jlong zfile,
291 jlong zentry, jlong pos, jbyteArray bytes,
292 jint off, jint len)
293 {
294 jzfile *zip = jlong_to_ptr(zfile);
295 char *msg;
296
297 #define BUFSIZE 8192
298 /* copy via tmp stack buffer: */
299 jbyte buf[BUFSIZE];
300
301 if (len > BUFSIZE) {
302 len = BUFSIZE;
303 }
304
305 ZIP_Lock(zip);
306 len = ZIP_Read(zip, jlong_to_ptr(zentry), pos, buf, len);
307 msg = zip->msg;
308 ZIP_Unlock(zip);
309 if (len != -1) {
310 (*env)->SetByteArrayRegion(env, bytes, off, len, buf);
311 }
312
313 if (len == -1) {
314 if (msg != 0) {
315 ThrowZipException(env, msg);
316 } else {
317 char errmsg[128];
318 sprintf(errmsg, "errno: %d, error: %s\n",
319 errno, "Error reading ZIP file");
320 JNU_ThrowIOExceptionWithLastError(env, errmsg);
321 }
322 }
323
324 return len;
325 }
326
327 /*
328 * Returns an array of strings representing the names of all entries
329 * that begin with "META-INF/" (case ignored). This native method is
330 * used in JarFile as an optimization when looking up manifest and
331 * signature file entries. Returns null if no entries were found.
332 */
333 JNIEXPORT jobjectArray JNICALL
334 Java_java_util_jar_JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj)
335 {
336 jlong zfile = (*env)->GetLongField(env, obj, jzfileID);
337 jzfile *zip;
338 int i, count;
339 jobjectArray result = 0;
340
341 if (zfile == 0) {
342 JNU_ThrowByName(env,
343 "java/lang/IllegalStateException", "zip file closed");
344 return NULL;
345 }
346 zip = jlong_to_ptr(zfile);
347
348 /* count the number of valid ZIP metanames */
349 count = 0;
350 if (zip->metanames != 0) {
351 for (i = 0; i < zip->metacount; i++) {
352 if (zip->metanames[i] != 0) {
353 count++;
354 }
355 }
356 }
357
358 /* If some names were found then build array of java strings */
359 if (count > 0) {
360 jclass cls = (*env)->FindClass(env, "java/lang/String");
361 result = (*env)->NewObjectArray(env, count, cls, 0);
362 if (result != 0) {
363 for (i = 0; i < count; i++) {
364 jstring str = (*env)->NewStringUTF(env, zip->metanames[i]);
365 if (str == 0) {
366 break;
367 }
368 (*env)->SetObjectArrayElement(env, result, i, str);
369 (*env)->DeleteLocalRef(env, str);
370 }
371 }
372 }
373 return result;
374 }
375
376 JNIEXPORT jstring JNICALL
377 Java_java_util_zip_ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile)
378 {
379 jzfile *zip = jlong_to_ptr(zfile);
380 char *msg = zip->msg;
381 if (msg == NULL) {
382 return NULL;
383 }
384 return JNU_NewStringPlatform(env, msg);
385 }