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 "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 if (s != NULL) {
75 x = JNU_NewObjectByName(env,
76 "java/util/zip/ZipException",
77 "(Ljava/lang/String;)V", s);
78 if (x != NULL) {
79 (*env)->Throw(env, x);
80 }
81 }
82 }
83
84 JNIEXPORT jlong JNICALL
85 Java_java_util_zip_ZipFile_open(JNIEnv *env, jclass cls, jstring name,
86 jint mode, jlong lastModified,
87 jboolean usemmap)
88 {
89 const char *path = JNU_GetStringPlatformChars(env, name, 0);
90 char *msg = 0;
91 jlong result = 0;
92 int flag = 0;
93 jzfile *zip = 0;
94
95 if (mode & OPEN_READ) flag |= O_RDONLY;
96
97 if (path != 0) {
98 zip = ZIP_Get_From_Cache(path, &msg, lastModified);
99 if (zip == 0 && msg == 0) {
100 ZFILE zfd = 0;
101 #ifdef WIN32
102 if (mode & OPEN_DELETE) flag |= O_TEMPORARY;
103 zfd = winFileHandleOpen(env, name, flag);
104 if (zfd == -1) {
105 /* Exception already pending. */
106 goto finally;
107 }
108 #else
109 zfd = open(path, flag, 0);
110 if (zfd < 0) {
111 throwFileNotFoundException(env, name);
112 goto finally;
113 }
114 if (mode & OPEN_DELETE) {
115 unlink(path);
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
138 Java_java_util_zip_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
146 Java_java_util_zip_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
154 Java_java_util_zip_ZipFile_close(JNIEnv *env, jclass cls, jlong zfile)
155 {
156 ZIP_Close(jlong_to_ptr(zfile));
157 }
158
159 JNIEXPORT jlong JNICALL
160 Java_java_util_zip_ZipFile_getEntry(JNIEnv *env, jclass cls, jlong zfile,
161 jbyteArray name, jboolean addSlash)
162 {
163 #define MAXNAME 1024
164 jzfile *zip = jlong_to_ptr(zfile);
165 jsize ulen = (*env)->GetArrayLength(env, name);
166 char buf[MAXNAME+2], *path;
167 jzentry *ze;
168
169 if (ulen > MAXNAME) {
170 path = malloc(ulen + 2);
171 if (path == 0) {
172 JNU_ThrowOutOfMemoryError(env, 0);
173 return 0;
174 }
175 } else {
176 path = buf;
177 }
178 (*env)->GetByteArrayRegion(env, name, 0, ulen, (jbyte *)path);
179 path[ulen] = '\0';
180 ze = ZIP_GetEntry2(zip, path, (jint)ulen, addSlash);
181 if (path != buf) {
182 free(path);
183 }
184 return ptr_to_jlong(ze);
185 }
186
187 JNIEXPORT void JNICALL
188 Java_java_util_zip_ZipFile_freeEntry(JNIEnv *env, jclass cls, jlong zfile,
189 jlong zentry)
190 {
191 jzfile *zip = jlong_to_ptr(zfile);
192 jzentry *ze = jlong_to_ptr(zentry);
193 ZIP_FreeEntry(zip, ze);
194 }
195
196 JNIEXPORT jlong JNICALL
197 Java_java_util_zip_ZipFile_getNextEntry(JNIEnv *env, jclass cls, jlong zfile,
198 jint n)
199 {
200 jzentry *ze = ZIP_GetNextEntry(jlong_to_ptr(zfile), n);
201 return ptr_to_jlong(ze);
202 }
203
204 JNIEXPORT jint JNICALL
205 Java_java_util_zip_ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry)
206 {
207 jzentry *ze = jlong_to_ptr(zentry);
208 return ze->csize != 0 ? DEFLATED : STORED;
209 }
210
211 JNIEXPORT jint JNICALL
212 Java_java_util_zip_ZipFile_getEntryFlag(JNIEnv *env, jclass cls, jlong zentry)
213 {
214 jzentry *ze = jlong_to_ptr(zentry);
215 return ze->flag;
216 }
217
218 JNIEXPORT jlong JNICALL
219 Java_java_util_zip_ZipFile_getEntryCSize(JNIEnv *env, jclass cls, jlong zentry)
220 {
221 jzentry *ze = jlong_to_ptr(zentry);
222 return ze->csize != 0 ? ze->csize : ze->size;
223 }
224
225 JNIEXPORT jlong JNICALL
226 Java_java_util_zip_ZipFile_getEntrySize(JNIEnv *env, jclass cls, jlong zentry)
227 {
228 jzentry *ze = jlong_to_ptr(zentry);
229 return ze->size;
230 }
231
232 JNIEXPORT jlong JNICALL
233 Java_java_util_zip_ZipFile_getEntryTime(JNIEnv *env, jclass cls, jlong zentry)
234 {
235 jzentry *ze = jlong_to_ptr(zentry);
236 return (jlong)ze->time & 0xffffffffUL;
237 }
238
239 JNIEXPORT jlong JNICALL
240 Java_java_util_zip_ZipFile_getEntryCrc(JNIEnv *env, jclass cls, jlong zentry)
241 {
242 jzentry *ze = jlong_to_ptr(zentry);
243 return (jlong)ze->crc & 0xffffffffUL;
244 }
245
246 JNIEXPORT jbyteArray JNICALL
247 Java_java_util_zip_ZipFile_getCommentBytes(JNIEnv *env,
248 jclass cls,
249 jlong zfile)
250 {
251 jzfile *zip = jlong_to_ptr(zfile);
252 jbyteArray jba = NULL;
253
254 if (zip->comment != NULL) {
255 if ((jba = (*env)->NewByteArray(env, zip->clen)) == NULL)
256 return NULL;
257 (*env)->SetByteArrayRegion(env, jba, 0, zip->clen, (jbyte*)zip->comment);
258 }
259 return jba;
260 }
261
262 JNIEXPORT jbyteArray JNICALL
263 Java_java_util_zip_ZipFile_getEntryBytes(JNIEnv *env,
264 jclass cls,
265 jlong zentry, jint type)
266 {
267 jzentry *ze = jlong_to_ptr(zentry);
268 int len = 0;
269 jbyteArray jba = NULL;
270 switch (type) {
271 case java_util_zip_ZipFile_JZENTRY_NAME:
272 if (ze->name != 0) {
273 len = (int)ze->nlen;
274 // Unlike for extra and comment, we never return null for
275 // an (extremely rarely seen) empty name
276 if ((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
303 Java_java_util_zip_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 #define BUFSIZE 8192
311 /* copy via tmp stack buffer: */
312 jbyte buf[BUFSIZE];
313
314 if (len > BUFSIZE) {
315 len = BUFSIZE;
316 }
317
318 ZIP_Lock(zip);
319 len = ZIP_Read(zip, jlong_to_ptr(zentry), pos, buf, len);
320 msg = zip->msg;
321 ZIP_Unlock(zip);
322 if (len != -1) {
323 (*env)->SetByteArrayRegion(env, bytes, off, len, buf);
324 }
325
326 if (len == -1) {
327 if (msg != 0) {
328 ThrowZipException(env, msg);
329 } else {
330 char errmsg[128];
331 sprintf(errmsg, "errno: %d, error: %s\n",
332 errno, "Error reading ZIP file");
333 JNU_ThrowIOExceptionWithLastError(env, errmsg);
334 }
335 }
336
337 return len;
338 }
339
340 /*
341 * Returns an array of strings representing the names of all entries
342 * that begin with "META-INF/" (case ignored). This native method is
343 * used in JarFile as an optimization when looking up manifest and
344 * signature file entries. Returns null if no entries were found.
345 */
346 JNIEXPORT jobjectArray JNICALL
347 Java_java_util_jar_JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj)
348 {
349 jlong zfile = (*env)->GetLongField(env, obj, jzfileID);
350 jzfile *zip;
351 int i, count;
352 jobjectArray result = 0;
353
354 if (zfile == 0) {
355 JNU_ThrowByName(env,
356 "java/lang/IllegalStateException", "zip file closed");
357 return NULL;
358 }
359 zip = jlong_to_ptr(zfile);
360
361 /* count the number of valid ZIP metanames */
362 count = 0;
363 if (zip->metanames != 0) {
364 for (i = 0; i < zip->metacount; i++) {
365 if (zip->metanames[i] != 0) {
366 count++;
367 }
368 }
369 }
370
371 /* If some names were found then build array of java strings */
372 if (count > 0) {
373 jclass cls = JNU_ClassString(env);
374 CHECK_NULL_RETURN(cls, NULL);
375 result = (*env)->NewObjectArray(env, count, cls, 0);
376 CHECK_NULL_RETURN(result, NULL);
377 if (result != 0) {
378 for (i = 0; i < count; i++) {
379 jstring str = (*env)->NewStringUTF(env, zip->metanames[i]);
380 if (str == 0) {
381 break;
382 }
383 (*env)->SetObjectArrayElement(env, result, i, str);
384 (*env)->DeleteLocalRef(env, str);
385 }
386 }
387 }
388 return result;
389 }
390
391 JNIEXPORT jstring JNICALL
392 Java_java_util_zip_ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile)
393 {
394 jzfile *zip = jlong_to_ptr(zfile);
395 char *msg = zip->msg;
396 if (msg == NULL) {
397 return NULL;
398 }
399 return JNU_NewStringPlatform(env, msg);
400 }