1 /*
2 * Copyright (c) 1998, 2012, 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 free(msg);
121 } else if (errno == ENOMEM) {
122 JNU_ThrowOutOfMemoryError(env, 0);
123 } else {
124 ThrowZipException(env, "error in opening zip file");
125 }
126 finally:
127 JNU_ReleaseStringPlatformChars(env, name, path);
128 }
129 return result;
130 }
131
132 JNIEXPORT jint JNICALL
133 Java_java_util_zip_ZipFile_getTotal(JNIEnv *env, jclass cls, jlong zfile)
134 {
135 jzfile *zip = jlong_to_ptr(zfile);
136
137 return zip->total;
138 }
139
140 JNIEXPORT jboolean JNICALL
141 Java_java_util_zip_ZipFile_startsWithLOC(JNIEnv *env, jclass cls, jlong zfile)
142 {
143 jzfile *zip = jlong_to_ptr(zfile);
144
145 return zip->locsig;
146 }
147
148 JNIEXPORT void JNICALL
149 Java_java_util_zip_ZipFile_close(JNIEnv *env, jclass cls, jlong zfile)
150 {
151 ZIP_Close(jlong_to_ptr(zfile));
152 }
153
154 JNIEXPORT jlong JNICALL
155 Java_java_util_zip_ZipFile_getEntry(JNIEnv *env, jclass cls, jlong zfile,
156 jbyteArray name, jboolean addSlash)
157 {
158 #define MAXNAME 1024
159 jzfile *zip = jlong_to_ptr(zfile);
160 jsize ulen = (*env)->GetArrayLength(env, name);
161 char buf[MAXNAME+2], *path;
162 jzentry *ze;
163
164 if (ulen > MAXNAME) {
165 path = malloc(ulen + 2);
166 if (path == 0) {
167 JNU_ThrowOutOfMemoryError(env, 0);
168 return 0;
169 }
170 } else {
171 path = buf;
172 }
173 (*env)->GetByteArrayRegion(env, name, 0, ulen, (jbyte *)path);
174 path[ulen] = '\0';
175 if (addSlash == JNI_FALSE) {
176 ze = ZIP_GetEntry(zip, path, 0);
177 } else {
178 ze = ZIP_GetEntry(zip, path, (jint)ulen);
179 }
180 if (path != buf) {
181 free(path);
182 }
183 return ptr_to_jlong(ze);
184 }
185
186 JNIEXPORT void JNICALL
187 Java_java_util_zip_ZipFile_freeEntry(JNIEnv *env, jclass cls, jlong zfile,
188 jlong zentry)
189 {
190 jzfile *zip = jlong_to_ptr(zfile);
191 jzentry *ze = jlong_to_ptr(zentry);
192 ZIP_FreeEntry(zip, ze);
193 }
194
195 JNIEXPORT jlong JNICALL
196 Java_java_util_zip_ZipFile_getNextEntry(JNIEnv *env, jclass cls, jlong zfile,
197 jint n)
198 {
199 jzentry *ze = ZIP_GetNextEntry(jlong_to_ptr(zfile), n);
200 return ptr_to_jlong(ze);
201 }
202
203 JNIEXPORT jint JNICALL
204 Java_java_util_zip_ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry)
205 {
206 jzentry *ze = jlong_to_ptr(zentry);
207 return ze->csize != 0 ? DEFLATED : STORED;
208 }
209
210 JNIEXPORT jint JNICALL
211 Java_java_util_zip_ZipFile_getEntryFlag(JNIEnv *env, jclass cls, jlong zentry)
212 {
213 jzentry *ze = jlong_to_ptr(zentry);
214 return ze->flag;
215 }
216
217 JNIEXPORT jlong JNICALL
218 Java_java_util_zip_ZipFile_getEntryCSize(JNIEnv *env, jclass cls, jlong zentry)
219 {
220 jzentry *ze = jlong_to_ptr(zentry);
221 return ze->csize != 0 ? ze->csize : ze->size;
222 }
223
224 JNIEXPORT jlong JNICALL
225 Java_java_util_zip_ZipFile_getEntrySize(JNIEnv *env, jclass cls, jlong zentry)
226 {
227 jzentry *ze = jlong_to_ptr(zentry);
228 return ze->size;
229 }
230
231 JNIEXPORT jlong JNICALL
232 Java_java_util_zip_ZipFile_getEntryTime(JNIEnv *env, jclass cls, jlong zentry)
233 {
234 jzentry *ze = jlong_to_ptr(zentry);
235 return (jlong)ze->time & 0xffffffffUL;
236 }
237
238 JNIEXPORT jlong JNICALL
239 Java_java_util_zip_ZipFile_getEntryCrc(JNIEnv *env, jclass cls, jlong zentry)
240 {
241 jzentry *ze = jlong_to_ptr(zentry);
242 return (jlong)ze->crc & 0xffffffffUL;
243 }
244
245 JNIEXPORT jbyteArray JNICALL
246 Java_java_util_zip_ZipFile_getCommentBytes(JNIEnv *env,
247 jclass cls,
248 jlong zfile)
249 {
250 jzfile *zip = jlong_to_ptr(zfile);
251 jbyteArray jba = NULL;
252
253 if (zip->comment != NULL) {
254 if ((jba = (*env)->NewByteArray(env, zip->clen)) == NULL)
255 return NULL;
256 (*env)->SetByteArrayRegion(env, jba, 0, zip->clen, (jbyte*)zip->comment);
257 }
258 return jba;
259 }
260
261 JNIEXPORT jbyteArray JNICALL
262 Java_java_util_zip_ZipFile_getEntryBytes(JNIEnv *env,
263 jclass cls,
264 jlong zentry, jint type)
265 {
266 jzentry *ze = jlong_to_ptr(zentry);
267 int len = 0;
268 jbyteArray jba = NULL;
269 switch (type) {
270 case java_util_zip_ZipFile_JZENTRY_NAME:
271 if (ze->name != 0) {
272 len = (int)strlen(ze->name);
273 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
274 break;
275 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte *)ze->name);
276 }
277 break;
278 case java_util_zip_ZipFile_JZENTRY_EXTRA:
279 if (ze->extra != 0) {
280 unsigned char *bp = (unsigned char *)&ze->extra[0];
281 len = (bp[0] | (bp[1] << 8));
282 if (len <= 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
283 break;
284 (*env)->SetByteArrayRegion(env, jba, 0, len, &ze->extra[2]);
285 }
286 break;
287 case java_util_zip_ZipFile_JZENTRY_COMMENT:
288 if (ze->comment != 0) {
289 len = (int)strlen(ze->comment);
290 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
291 break;
292 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte*)ze->comment);
293 }
294 break;
295 }
296 return jba;
297 }
298
299 JNIEXPORT jint JNICALL
300 Java_java_util_zip_ZipFile_read(JNIEnv *env, jclass cls, jlong zfile,
301 jlong zentry, jlong pos, jbyteArray bytes,
302 jint off, jint len)
303 {
304 jzfile *zip = jlong_to_ptr(zfile);
305 char *msg;
306
307 #define BUFSIZE 8192
308 /* copy via tmp stack buffer: */
309 jbyte buf[BUFSIZE];
310
311 if (len > BUFSIZE) {
312 len = BUFSIZE;
313 }
314
315 ZIP_Lock(zip);
316 len = ZIP_Read(zip, jlong_to_ptr(zentry), pos, buf, len);
317 msg = zip->msg;
318 ZIP_Unlock(zip);
319 if (len != -1) {
320 (*env)->SetByteArrayRegion(env, bytes, off, len, buf);
321 }
322
323 if (len == -1) {
324 if (msg != 0) {
325 ThrowZipException(env, msg);
326 } else {
327 char errmsg[128];
328 sprintf(errmsg, "errno: %d, error: %s\n",
329 errno, "Error reading ZIP file");
330 JNU_ThrowIOExceptionWithLastError(env, errmsg);
331 }
332 }
333
334 return len;
335 }
336
337 /*
338 * Returns an array of strings representing the names of all entries
339 * that begin with "META-INF/" (case ignored). This native method is
340 * used in JarFile as an optimization when looking up manifest and
341 * signature file entries. Returns null if no entries were found.
342 */
343 JNIEXPORT jobjectArray JNICALL
344 Java_java_util_jar_JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj)
345 {
346 jlong zfile = (*env)->GetLongField(env, obj, jzfileID);
347 jzfile *zip;
348 int i, count;
349 jobjectArray result = 0;
350
351 if (zfile == 0) {
352 JNU_ThrowByName(env,
353 "java/lang/IllegalStateException", "zip file closed");
354 return NULL;
355 }
356 zip = jlong_to_ptr(zfile);
357
358 /* count the number of valid ZIP metanames */
359 count = 0;
360 if (zip->metanames != 0) {
361 for (i = 0; i < zip->metacount; i++) {
362 if (zip->metanames[i] != 0) {
363 count++;
364 }
365 }
366 }
367
368 /* If some names were found then build array of java strings */
369 if (count > 0) {
370 jclass cls = (*env)->FindClass(env, "java/lang/String");
371 result = (*env)->NewObjectArray(env, count, cls, 0);
372 if (result != 0) {
373 for (i = 0; i < count; i++) {
374 jstring str = (*env)->NewStringUTF(env, zip->metanames[i]);
375 if (str == 0) {
376 break;
377 }
378 (*env)->SetObjectArrayElement(env, result, i, str);
379 (*env)->DeleteLocalRef(env, str);
380 }
381 }
382 }
383 return result;
384 }
385
386 JNIEXPORT jstring JNICALL
387 Java_java_util_zip_ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile)
388 {
389 jzfile *zip = jlong_to_ptr(zfile);
390 char *msg = zip->msg;
391 if (msg == NULL) {
392 return NULL;
393 }
394 return JNU_NewStringPlatform(env, msg);
395 }