1 /*
2 * Copyright (c) 1998, 2015, 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
59 /*
60 * Declare library specific JNI_Onload entry if static build
61 */
62 DEF_STATIC_JNI_OnLoad
63
64 JNIEXPORT void JNICALL
65 Java_java_util_zip_ZipFile_initIDs(JNIEnv *env, jclass cls)
66 {
67 jzfileID = (*env)->GetFieldID(env, cls, "jzfile", "J");
68 assert(jzfileID != 0);
69 }
70
71 static void
72 ThrowZipException(JNIEnv *env, const char *msg)
73 {
74 jstring s = NULL;
75 jobject x;
76
77 if (msg != NULL) {
78 s = JNU_NewStringPlatform(env, msg);
79 }
80 if (s != NULL) {
81 x = JNU_NewObjectByName(env,
82 "java/util/zip/ZipException",
83 "(Ljava/lang/String;)V", s);
84 if (x != NULL) {
85 (*env)->Throw(env, x);
86 }
87 }
88 }
89
90 JNIEXPORT jlong JNICALL
91 Java_java_util_zip_ZipFile_open(JNIEnv *env, jclass cls, jstring name,
92 jint mode, jlong lastModified,
93 jboolean usemmap)
94 {
95 const char *path = JNU_GetStringPlatformChars(env, name, 0);
96 char *msg = 0;
97 jlong result = 0;
98 int flag = 0;
99 jzfile *zip = 0;
100
101 if (mode & OPEN_READ) flag |= O_RDONLY;
102
103 if (path != 0) {
104 zip = ZIP_Get_From_Cache(path, &msg, lastModified);
105 if (zip == 0 && msg == 0) {
106 ZFILE zfd = 0;
107 #ifdef WIN32
108 if (mode & OPEN_DELETE) flag |= O_TEMPORARY;
109 zfd = winFileHandleOpen(env, name, flag);
110 if (zfd == -1) {
111 /* Exception already pending. */
112 goto finally;
113 }
114 #else
115 zfd = open(path, flag, 0);
116 if (zfd < 0) {
117 throwFileNotFoundException(env, name);
118 goto finally;
119 }
120 if (mode & OPEN_DELETE) {
121 unlink(path);
122 }
123 #endif
124 zip = ZIP_Put_In_Cache0(path, zfd, &msg, lastModified, usemmap);
125 }
126
127 if (zip != 0) {
128 result = ptr_to_jlong(zip);
129 } else if (msg != 0) {
130 ThrowZipException(env, msg);
131 free(msg);
132 } else if (errno == ENOMEM) {
133 JNU_ThrowOutOfMemoryError(env, 0);
134 } else {
135 ThrowZipException(env, "error in opening zip file");
136 }
137 finally:
138 JNU_ReleaseStringPlatformChars(env, name, path);
139 }
140 return result;
141 }
142
143 JNIEXPORT jint JNICALL
144 Java_java_util_zip_ZipFile_getTotal(JNIEnv *env, jclass cls, jlong zfile)
145 {
146 jzfile *zip = jlong_to_ptr(zfile);
147
148 return zip->total;
149 }
150
151 JNIEXPORT jboolean JNICALL
152 Java_java_util_zip_ZipFile_startsWithLOC(JNIEnv *env, jclass cls, jlong zfile)
153 {
154 jzfile *zip = jlong_to_ptr(zfile);
155
156 return zip->locsig;
157 }
158
159 JNIEXPORT void JNICALL
160 Java_java_util_zip_ZipFile_close(JNIEnv *env, jclass cls, jlong zfile)
161 {
162 ZIP_Close(jlong_to_ptr(zfile));
163 }
164
165 JNIEXPORT jlong JNICALL
166 Java_java_util_zip_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
194 Java_java_util_zip_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
203 Java_java_util_zip_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
211 Java_java_util_zip_ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry)
212 {
213 jzentry *ze = jlong_to_ptr(zentry);
214 return ze->method;
215 }
216
217 JNIEXPORT jint JNICALL
218 Java_java_util_zip_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
225 Java_java_util_zip_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
232 Java_java_util_zip_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
239 Java_java_util_zip_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
246 Java_java_util_zip_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
253 Java_java_util_zip_ZipFile_getCommentBytes(JNIEnv *env,
254 jclass cls,
255 jlong zfile)
256 {
257 jzfile *zip = jlong_to_ptr(zfile);
258 jbyteArray jba = NULL;
259
260 if (zip->comment != NULL) {
261 if ((jba = (*env)->NewByteArray(env, zip->clen)) == NULL)
262 return NULL;
263 (*env)->SetByteArrayRegion(env, jba, 0, zip->clen, (jbyte*)zip->comment);
264 }
265 return jba;
266 }
267
268 JNIEXPORT jbyteArray JNICALL
269 Java_java_util_zip_ZipFile_getEntryBytes(JNIEnv *env,
270 jclass cls,
271 jlong zentry, jint type)
272 {
273 jzentry *ze = jlong_to_ptr(zentry);
274 int len = 0;
275 jbyteArray jba = NULL;
276 switch (type) {
277 case java_util_zip_ZipFile_JZENTRY_NAME:
278 if (ze->name != 0) {
279 len = (int)ze->nlen;
280 // Unlike for extra and comment, we never return null for
281 // an (extremely rarely seen) empty name
282 if ((jba = (*env)->NewByteArray(env, len)) == NULL)
283 break;
284 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte *)ze->name);
285 }
286 break;
287 case java_util_zip_ZipFile_JZENTRY_EXTRA:
288 if (ze->extra != 0) {
289 unsigned char *bp = (unsigned char *)&ze->extra[0];
290 len = (bp[0] | (bp[1] << 8));
291 if (len <= 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
292 break;
293 (*env)->SetByteArrayRegion(env, jba, 0, len, &ze->extra[2]);
294 }
295 break;
296 case java_util_zip_ZipFile_JZENTRY_COMMENT:
297 if (ze->comment != 0) {
298 len = (int)strlen(ze->comment);
299 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
300 break;
301 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte*)ze->comment);
302 }
303 break;
304 }
305 return jba;
306 }
307
308 JNIEXPORT jint JNICALL
309 Java_java_util_zip_ZipFile_read(JNIEnv *env, jclass cls, jlong zfile,
310 jlong zentry, jlong pos, jbyteArray bytes,
311 jint off, jint len)
312 {
313 jzfile *zip = jlong_to_ptr(zfile);
314 char *msg;
315
316 #define BUFSIZE 8192
317 /* copy via tmp stack buffer: */
318 jbyte buf[BUFSIZE];
319
320 if (len > BUFSIZE) {
321 len = BUFSIZE;
322 }
323
324 ZIP_Lock(zip);
325 len = ZIP_Read(zip, jlong_to_ptr(zentry), pos, buf, len);
326 msg = zip->msg;
327 ZIP_Unlock(zip);
328 if (len != -1) {
329 (*env)->SetByteArrayRegion(env, bytes, off, len, buf);
330 }
331
332 if (len == -1) {
333 if (msg != 0) {
334 ThrowZipException(env, msg);
335 } else {
336 char errmsg[128];
337 sprintf(errmsg, "errno: %d, error: %s\n",
338 errno, "Error reading ZIP file");
339 JNU_ThrowIOExceptionWithLastError(env, errmsg);
340 }
341 }
342
343 return len;
344 }
345
346 /*
347 * Returns an array of strings representing the names of all entries
348 * that begin with "META-INF/" (case ignored). This native method is
349 * used in JarFile as an optimization when looking up manifest and
350 * signature file entries. Returns null if no entries were found.
351 */
352 JNIEXPORT jobjectArray JNICALL
353 Java_java_util_jar_JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj)
354 {
355 jlong zfile = (*env)->GetLongField(env, obj, jzfileID);
356 jzfile *zip;
357 int i, count;
358 jobjectArray result = 0;
359
360 if (zfile == 0) {
361 JNU_ThrowByName(env,
362 "java/lang/IllegalStateException", "zip file closed");
363 return NULL;
364 }
365 zip = jlong_to_ptr(zfile);
366
367 /* count the number of valid ZIP metanames */
368 count = 0;
369 if (zip->metanames != 0) {
370 for (i = 0; i < zip->metacount; i++) {
371 if (zip->metanames[i] != 0) {
372 count++;
373 }
374 }
375 }
376
377 /* If some names were found then build array of java strings */
378 if (count > 0) {
379 jclass cls = JNU_ClassString(env);
380 CHECK_NULL_RETURN(cls, NULL);
381 result = (*env)->NewObjectArray(env, count, cls, 0);
382 CHECK_NULL_RETURN(result, NULL);
383 if (result != 0) {
384 for (i = 0; i < count; i++) {
385 jstring str = (*env)->NewStringUTF(env, zip->metanames[i]);
386 if (str == 0) {
387 break;
388 }
389 (*env)->SetObjectArrayElement(env, result, i, str);
390 (*env)->DeleteLocalRef(env, str);
391 }
392 }
393 }
394 return result;
395 }
396
397 JNIEXPORT jstring JNICALL
398 Java_java_util_zip_ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile)
399 {
400 jzfile *zip = jlong_to_ptr(zfile);
401 char *msg = zip->msg;
402 if (msg == NULL) {
403 return NULL;
404 }
405 return JNU_NewStringPlatform(env, msg);
406 }