1 /*
2 * Copyright (c) 1998, 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 /*
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 <nativehelper/JNIHelp.h>
37 #include "jlong.h"
38 #include "jvm.h"
39 #include "jni.h"
40 #include "jni_util.h"
41 #include "zip_util.h"
42 #ifdef WIN32
43 #include "io_util_md.h"
44 #else
45 #include "io_util.h"
46 #endif
47
48 #include "java_util_zip_ZipFile.h"
49
50 #define NATIVE_METHOD(className, functionName, signature) \
51 { #functionName, signature, (void*)(className ## _ ## functionName) }
52
53 #define DEFLATED 8
54 #define STORED 0
55
56 static jfieldID jzfileID;
57
58 static int OPEN_READ = java_util_zip_ZipFile_OPEN_READ;
59 static int OPEN_DELETE = java_util_zip_ZipFile_OPEN_DELETE;
60
ZipFile_initIDs(JNIEnv * env)61 static void ZipFile_initIDs(JNIEnv *env)
62 {
63 jclass cls = (*env)->FindClass(env, "java/util/zip/ZipFile");
64 jzfileID = (*env)->GetFieldID(env, cls, "jzfile", "J");
65 assert(jzfileID != 0);
66 }
67
68
69 static void
ThrowZipException(JNIEnv * env,const char * msg)70 ThrowZipException(JNIEnv *env, const char *msg)
71 {
72 jstring s = NULL;
73 jobject x;
74
75 if (msg != NULL) {
76 s = JNU_NewStringPlatform(env, msg);
77 }
78 x = JNU_NewObjectByName(env,
79 "java/util/zip/ZipException",
80 "(Ljava/lang/String;)V", s);
81 if (x != NULL) {
82 (*env)->Throw(env, x);
83 }
84 }
85
86 JNIEXPORT jlong JNICALL
ZipFile_open(JNIEnv * env,jclass cls,jstring name,jint mode,jlong lastModified,jboolean usemmap)87 ZipFile_open(JNIEnv *env, jclass cls, jstring name,
88 jint mode, jlong lastModified,
89 jboolean usemmap)
90 {
91 const char *path = JNU_GetStringPlatformChars(env, name, 0);
92 char *msg = 0;
93 jlong result = 0;
94 int flag = 0;
95 jzfile *zip = 0;
96
97 if (mode & OPEN_READ) flag |= O_RDONLY;
98 // Android changed, JVM_O_DELETE/unlink is problematic, see b/28901232.
99 //if (mode & OPEN_DELETE) flag |= JVM_O_DELETE;
100
101 if (path != 0) {
102 zip = ZIP_Get_From_Cache(path, &msg, lastModified);
103 if (zip == 0 && msg == 0) {
104 ZFILE zfd = 0;
105 #ifdef WIN32
106 zfd = winFileHandleOpen(env, name, flag);
107 if (zfd == -1) {
108 /* Exception already pending. */
109 goto finally;
110 }
111 #else
112 zfd = JVM_Open(path, flag, 0);
113 if (zfd < 0) {
114 throwFileNotFoundException(env, name);
115 goto finally;
116 }
117 #endif
118 zip = ZIP_Put_In_Cache0(path, zfd, &msg, lastModified, usemmap);
119 }
120
121 if (zip != 0) {
122 result = ptr_to_jlong(zip);
123 } else if (msg != 0) {
124 ThrowZipException(env, msg);
125 free(msg);
126 } else if (errno == ENOMEM) {
127 JNU_ThrowOutOfMemoryError(env, 0);
128 } else {
129 ThrowZipException(env, "error in opening zip file");
130 }
131 finally:
132 JNU_ReleaseStringPlatformChars(env, name, path);
133 }
134 return result;
135 }
136
137 JNIEXPORT jint JNICALL
ZipFile_getTotal(JNIEnv * env,jclass cls,jlong zfile)138 ZipFile_getTotal(JNIEnv *env, jclass cls, jlong zfile)
139 {
140 jzfile *zip = jlong_to_ptr(zfile);
141
142 return zip->total;
143 }
144
145 JNIEXPORT jboolean JNICALL
ZipFile_startsWithLOC(JNIEnv * env,jclass cls,jlong zfile)146 ZipFile_startsWithLOC(JNIEnv *env, jclass cls, jlong zfile)
147 {
148 jzfile *zip = jlong_to_ptr(zfile);
149
150 return zip->locsig;
151 }
152
153 JNIEXPORT void JNICALL
ZipFile_close(JNIEnv * env,jclass cls,jlong zfile)154 ZipFile_close(JNIEnv *env, jclass cls, jlong zfile)
155 {
156 ZIP_Close(jlong_to_ptr(zfile));
157 }
158
159 JNIEXPORT jint JNICALL
ZipFile_getFileDescriptor(JNIEnv * env,jclass cls,jlong zfile)160 ZipFile_getFileDescriptor(JNIEnv *env, jclass cls, jlong zfile) {
161 jzfile *zip = jlong_to_ptr(zfile);
162 return zip->zfd;
163 }
164
165 JNIEXPORT jlong JNICALL
ZipFile_getEntry(JNIEnv * env,jclass cls,jlong zfile,jbyteArray name,jboolean addSlash)166 ZipFile_getEntry(JNIEnv *env, jclass cls, jlong zfile,
167 jbyteArray name, jboolean addSlash)
168 {
169 #define MAXNAME 1024
170 jzfile *zip = jlong_to_ptr(zfile);
171 jsize ulen = (*env)->GetArrayLength(env, name);
172 char buf[MAXNAME+2], *path;
173 jzentry *ze;
174
175 if (ulen > MAXNAME) {
176 path = malloc(ulen + 2);
177 if (path == 0) {
178 JNU_ThrowOutOfMemoryError(env, 0);
179 return 0;
180 }
181 } else {
182 path = buf;
183 }
184 (*env)->GetByteArrayRegion(env, name, 0, ulen, (jbyte *)path);
185 path[ulen] = '\0';
186 ze = ZIP_GetEntry2(zip, path, (jint)ulen, addSlash);
187 if (path != buf) {
188 free(path);
189 }
190 return ptr_to_jlong(ze);
191 }
192
193 JNIEXPORT void JNICALL
ZipFile_freeEntry(JNIEnv * env,jclass cls,jlong zfile,jlong zentry)194 ZipFile_freeEntry(JNIEnv *env, jclass cls, jlong zfile,
195 jlong zentry)
196 {
197 jzfile *zip = jlong_to_ptr(zfile);
198 jzentry *ze = jlong_to_ptr(zentry);
199 ZIP_FreeEntry(zip, ze);
200 }
201
202 JNIEXPORT jlong JNICALL
ZipFile_getNextEntry(JNIEnv * env,jclass cls,jlong zfile,jint n)203 ZipFile_getNextEntry(JNIEnv *env, jclass cls, jlong zfile,
204 jint n)
205 {
206 jzentry *ze = ZIP_GetNextEntry(jlong_to_ptr(zfile), n);
207 return ptr_to_jlong(ze);
208 }
209
210 JNIEXPORT jint JNICALL
ZipFile_getEntryMethod(JNIEnv * env,jclass cls,jlong zentry)211 ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry)
212 {
213 jzentry *ze = jlong_to_ptr(zentry);
214 return ze->csize != 0 ? DEFLATED : STORED;
215 }
216
217 JNIEXPORT jint JNICALL
ZipFile_getEntryFlag(JNIEnv * env,jclass cls,jlong zentry)218 ZipFile_getEntryFlag(JNIEnv *env, jclass cls, jlong zentry)
219 {
220 jzentry *ze = jlong_to_ptr(zentry);
221 return ze->flag;
222 }
223
224 JNIEXPORT jlong JNICALL
ZipFile_getEntryCSize(JNIEnv * env,jclass cls,jlong zentry)225 ZipFile_getEntryCSize(JNIEnv *env, jclass cls, jlong zentry)
226 {
227 jzentry *ze = jlong_to_ptr(zentry);
228 return ze->csize != 0 ? ze->csize : ze->size;
229 }
230
231 JNIEXPORT jlong JNICALL
ZipFile_getEntrySize(JNIEnv * env,jclass cls,jlong zentry)232 ZipFile_getEntrySize(JNIEnv *env, jclass cls, jlong zentry)
233 {
234 jzentry *ze = jlong_to_ptr(zentry);
235 return ze->size;
236 }
237
238 JNIEXPORT jlong JNICALL
ZipFile_getEntryTime(JNIEnv * env,jclass cls,jlong zentry)239 ZipFile_getEntryTime(JNIEnv *env, jclass cls, jlong zentry)
240 {
241 jzentry *ze = jlong_to_ptr(zentry);
242 return (jlong)ze->time & 0xffffffffUL;
243 }
244
245 JNIEXPORT jlong JNICALL
ZipFile_getEntryCrc(JNIEnv * env,jclass cls,jlong zentry)246 ZipFile_getEntryCrc(JNIEnv *env, jclass cls, jlong zentry)
247 {
248 jzentry *ze = jlong_to_ptr(zentry);
249 return (jlong)ze->crc & 0xffffffffUL;
250 }
251
252 JNIEXPORT jbyteArray JNICALL
ZipFile_getCommentBytes(JNIEnv * env,jclass cls,jlong zfile)253 ZipFile_getCommentBytes(JNIEnv *env, jclass cls, jlong zfile)
254 {
255 jzfile *zip = jlong_to_ptr(zfile);
256 jbyteArray jba = NULL;
257
258 if (zip->comment != NULL) {
259 if ((jba = (*env)->NewByteArray(env, zip->clen)) == NULL)
260 return NULL;
261 (*env)->SetByteArrayRegion(env, jba, 0, zip->clen, (jbyte*)zip->comment);
262 }
263 return jba;
264 }
265
266 JNIEXPORT jbyteArray JNICALL
ZipFile_getEntryBytes(JNIEnv * env,jclass cls,jlong zentry,jint type)267 ZipFile_getEntryBytes(JNIEnv *env, jclass cls, jlong zentry, jint type)
268 {
269 jzentry *ze = jlong_to_ptr(zentry);
270 int len = 0;
271 jbyteArray jba = NULL;
272 switch (type) {
273 case java_util_zip_ZipFile_JZENTRY_NAME:
274 if (ze->name != 0) {
275 len = (int)ze->nlen;
276 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
277 break;
278 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte *)ze->name);
279 }
280 break;
281 case java_util_zip_ZipFile_JZENTRY_EXTRA:
282 if (ze->extra != 0) {
283 unsigned char *bp = (unsigned char *)&ze->extra[0];
284 len = (bp[0] | (bp[1] << 8));
285 if (len <= 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
286 break;
287 (*env)->SetByteArrayRegion(env, jba, 0, len, &ze->extra[2]);
288 }
289 break;
290 case java_util_zip_ZipFile_JZENTRY_COMMENT:
291 if (ze->comment != 0) {
292 len = (int)strlen(ze->comment);
293 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
294 break;
295 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte*)ze->comment);
296 }
297 break;
298 }
299 return jba;
300 }
301
302 JNIEXPORT jint JNICALL
ZipFile_read(JNIEnv * env,jclass cls,jlong zfile,jlong zentry,jlong pos,jbyteArray bytes,jint off,jint len)303 ZipFile_read(JNIEnv *env, jclass cls, jlong zfile,
304 jlong zentry, jlong pos, jbyteArray bytes,
305 jint off, jint len)
306 {
307 jzfile *zip = jlong_to_ptr(zfile);
308 char *msg;
309
310 // BEGIN Android-changed: Removed tmp stack buffer.
311 long long length = (long long)(*env)->GetArrayLength(env, bytes);
312 if (off < 0 || len < 0 || off + len > length) {
313 char errmsg[128];
314 snprintf(errmsg, sizeof(errmsg), "len: %d, off: %d are not valid for array sized %lld\n",
315 len, off, length);
316 JNU_ThrowArrayIndexOutOfBoundsException(env, errmsg);
317 return -1;
318 }
319
320 jbyte *buf = (*env)->GetByteArrayElements(env, bytes, NULL);
321 ZIP_Lock(zip);
322 len = ZIP_Read(zip, jlong_to_ptr(zentry), pos, buf + off, len);
323 msg = zip->msg;
324 ZIP_Unlock(zip);
325 (*env)->ReleaseByteArrayElements(env, bytes, buf, 0);
326
327 if (len == -1) {
328 if (msg != 0) {
329 ThrowZipException(env, msg);
330 } else {
331 char errmsg[128];
332 snprintf(errmsg, sizeof(errmsg), "errno: %d, error: %s\n", errno,
333 "Error reading ZIP file");
334 JNU_ThrowIOExceptionWithLastError(env, errmsg);
335 }
336 }
337 // END Android-changed: Removed tmp stack buffer.
338
339 return len;
340 }
341
342 JNIEXPORT jstring JNICALL
ZipFile_getZipMessage(JNIEnv * env,jclass cls,jlong zfile)343 ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile)
344 {
345 jzfile *zip = jlong_to_ptr(zfile);
346 char *msg = zip->msg;
347 if (msg == NULL) {
348 return NULL;
349 }
350 return JNU_NewStringPlatform(env, msg);
351 }
352
353 JNIEXPORT jobjectArray JNICALL
JarFile_getMetaInfEntryNames(JNIEnv * env,jobject obj)354 JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj)
355 {
356 jlong zfile = (*env)->GetLongField(env, obj, jzfileID);
357 jzfile *zip;
358 int i, count;
359 jobjectArray result = 0;
360
361 if (zfile == 0) {
362 JNU_ThrowByName(env,
363 "java/lang/IllegalStateException", "zip file closed");
364 return NULL;
365 }
366 zip = jlong_to_ptr(zfile);
367
368 /* count the number of valid ZIP metanames */
369 count = 0;
370 if (zip->metanames != 0) {
371 for (i = 0; i < zip->metacount; i++) {
372 if (zip->metanames[i] != 0) {
373 count++;
374 }
375 }
376 }
377
378 /* If some names were found then build array of java strings */
379 if (count > 0) {
380 jclass cls = (*env)->FindClass(env, "java/lang/String");
381 result = (*env)->NewObjectArray(env, count, cls, 0);
382 if (result != 0) {
383 for (i = 0; i < count; i++) {
384 jstring str = (*env)->NewStringUTF(env, zip->metanames[i]);
385 if (str == 0) {
386 break;
387 }
388 (*env)->SetObjectArrayElement(env, result, i, str);
389 (*env)->DeleteLocalRef(env, str);
390 }
391 }
392 }
393 return result;
394 }
395
396 static JNINativeMethod gMethods[] = {
397 NATIVE_METHOD(ZipFile, getFileDescriptor, "(J)I"),
398 NATIVE_METHOD(ZipFile, getEntry, "(J[BZ)J"),
399 NATIVE_METHOD(ZipFile, freeEntry, "(JJ)V"),
400 NATIVE_METHOD(ZipFile, getNextEntry, "(JI)J"),
401 NATIVE_METHOD(ZipFile, close, "(J)V"),
402 NATIVE_METHOD(ZipFile, open, "(Ljava/lang/String;IJZ)J"),
403 NATIVE_METHOD(ZipFile, getTotal, "(J)I"),
404 NATIVE_METHOD(ZipFile, startsWithLOC, "(J)Z"),
405 NATIVE_METHOD(ZipFile, read, "(JJJ[BII)I"),
406 NATIVE_METHOD(ZipFile, getEntryTime, "(J)J"),
407 NATIVE_METHOD(ZipFile, getEntryCrc, "(J)J"),
408 NATIVE_METHOD(ZipFile, getEntryCSize, "(J)J"),
409 NATIVE_METHOD(ZipFile, getEntrySize, "(J)J"),
410 NATIVE_METHOD(ZipFile, getEntryMethod, "(J)I"),
411 NATIVE_METHOD(ZipFile, getEntryFlag, "(J)I"),
412 NATIVE_METHOD(ZipFile, getCommentBytes, "(J)[B"),
413 NATIVE_METHOD(ZipFile, getEntryBytes, "(JI)[B"),
414 NATIVE_METHOD(ZipFile, getZipMessage, "(J)Ljava/lang/String;"),
415 };
416
417 static JNINativeMethod gJarFileMethods[] = {
418 NATIVE_METHOD(JarFile, getMetaInfEntryNames, "()[Ljava/lang/String;"),
419 };
420
register_java_util_zip_ZipFile(JNIEnv * env)421 void register_java_util_zip_ZipFile(JNIEnv* env) {
422 jniRegisterNativeMethods(env, "java/util/zip/ZipFile", gMethods, NELEM(gMethods));
423 ZipFile_initIDs(env);
424
425 jniRegisterNativeMethods(env, "java/util/jar/JarFile", gJarFileMethods, NELEM(gJarFileMethods));
426 }
427