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 if (mode & OPEN_DELETE) flag |= JVM_O_DELETE;
97
98 if (path != 0) {
99 zip = ZIP_Get_From_Cache(path, &msg, lastModified);
100 if (zip == 0 && msg == 0) {
101 ZFILE zfd = 0;
102 #ifdef WIN32
103 zfd = winFileHandleOpen(env, name, flag);
104 if (zfd == -1) {
105 /* Exception already pending. */
106 goto finally;
107 }
108 #else
109 zfd = JVM_Open(path, flag, 0);
110 if (zfd < 0) {
111 throwFileNotFoundException(env, name);
112 goto finally;
113 }
114 #endif
115 zip = ZIP_Put_In_Cache0(path, zfd, &msg, lastModified, usemmap);
116 }
117
118 if (zip != 0) {
119 result = ptr_to_jlong(zip);
120 } else if (msg != 0) {
121 ThrowZipException(env, msg);
122 free(msg);
123 } else if (errno == ENOMEM) {
124 JNU_ThrowOutOfMemoryError(env, 0);
125 } else {
126 ThrowZipException(env, "error in opening zip file");
127 }
128 finally:
129 JNU_ReleaseStringPlatformChars(env, name, path);
130 }
131 return result;
132 }
133
134 JNIEXPORT jint JNICALL
135 Java_java_util_zip_ZipFile_getTotal(JNIEnv *env, jclass cls, jlong zfile)
136 {
137 jzfile *zip = jlong_to_ptr(zfile);
138
139 return zip->total;
140 }
141
142 JNIEXPORT jboolean JNICALL
143 Java_java_util_zip_ZipFile_startsWithLOC(JNIEnv *env, jclass cls, jlong zfile)
144 {
145 jzfile *zip = jlong_to_ptr(zfile);
146
147 return zip->locsig;
148 }
149
150 JNIEXPORT void JNICALL
151 Java_java_util_zip_ZipFile_close(JNIEnv *env, jclass cls, jlong zfile)
152 {
153 ZIP_Close(jlong_to_ptr(zfile));
154 }
155
156 JNIEXPORT jlong JNICALL
157 Java_java_util_zip_ZipFile_getEntry(JNIEnv *env, jclass cls, jlong zfile,
158 jbyteArray name, jboolean addSlash)
159 {
160 #define MAXNAME 1024
161 jzfile *zip = jlong_to_ptr(zfile);
162 jsize ulen = (*env)->GetArrayLength(env, name);
163 char buf[MAXNAME+2], *path;
164 jzentry *ze;
165
166 if (ulen > MAXNAME) {
167 path = malloc(ulen + 2);
168 if (path == 0) {
169 JNU_ThrowOutOfMemoryError(env, 0);
170 return 0;
171 }
172 } else {
173 path = buf;
174 }
175 (*env)->GetByteArrayRegion(env, name, 0, ulen, (jbyte *)path);
176 path[ulen] = '\0';
177 if (addSlash == JNI_FALSE) {
178 ze = ZIP_GetEntry(zip, path, 0);
179 } else {
180 ze = ZIP_GetEntry(zip, path, (jint)ulen);
181 }
182 if (path != buf) {
183 free(path);
184 }
185 return ptr_to_jlong(ze);
186 }
187
188 JNIEXPORT void JNICALL
189 Java_java_util_zip_ZipFile_freeEntry(JNIEnv *env, jclass cls, jlong zfile,
190 jlong zentry)
191 {
192 jzfile *zip = jlong_to_ptr(zfile);
193 jzentry *ze = jlong_to_ptr(zentry);
194 ZIP_FreeEntry(zip, ze);
195 }
196
197 JNIEXPORT jlong JNICALL
198 Java_java_util_zip_ZipFile_getNextEntry(JNIEnv *env, jclass cls, jlong zfile,
199 jint n)
200 {
201 jzentry *ze = ZIP_GetNextEntry(jlong_to_ptr(zfile), n);
202 return ptr_to_jlong(ze);
203 }
204
205 JNIEXPORT jint JNICALL
206 Java_java_util_zip_ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry)
207 {
208 jzentry *ze = jlong_to_ptr(zentry);
209 return ze->csize != 0 ? DEFLATED : STORED;
210 }
211
212 JNIEXPORT jint JNICALL
213 Java_java_util_zip_ZipFile_getEntryFlag(JNIEnv *env, jclass cls, jlong zentry)
214 {
215 jzentry *ze = jlong_to_ptr(zentry);
216 return ze->flag;
217 }
218
219 JNIEXPORT jlong JNICALL
220 Java_java_util_zip_ZipFile_getEntryCSize(JNIEnv *env, jclass cls, jlong zentry)
221 {
222 jzentry *ze = jlong_to_ptr(zentry);
223 return ze->csize != 0 ? ze->csize : ze->size;
224 }
225
226 JNIEXPORT jlong JNICALL
227 Java_java_util_zip_ZipFile_getEntrySize(JNIEnv *env, jclass cls, jlong zentry)
228 {
229 jzentry *ze = jlong_to_ptr(zentry);
230 return ze->size;
231 }
232
233 JNIEXPORT jlong JNICALL
234 Java_java_util_zip_ZipFile_getEntryTime(JNIEnv *env, jclass cls, jlong zentry)
235 {
236 jzentry *ze = jlong_to_ptr(zentry);
237 return (jlong)ze->time & 0xffffffffUL;
238 }
239
240 JNIEXPORT jlong JNICALL
241 Java_java_util_zip_ZipFile_getEntryCrc(JNIEnv *env, jclass cls, jlong zentry)
242 {
243 jzentry *ze = jlong_to_ptr(zentry);
244 return (jlong)ze->crc & 0xffffffffUL;
245 }
246
247 JNIEXPORT jbyteArray JNICALL
248 Java_java_util_zip_ZipFile_getCommentBytes(JNIEnv *env,
249 jclass cls,
250 jlong zfile)
251 {
252 jzfile *zip = jlong_to_ptr(zfile);
253 jbyteArray jba = NULL;
254
255 if (zip->comment != NULL) {
256 if ((jba = (*env)->NewByteArray(env, zip->clen)) == NULL)
257 return NULL;
258 (*env)->SetByteArrayRegion(env, jba, 0, zip->clen, (jbyte*)zip->comment);
259 }
260 return jba;
261 }
262
263 JNIEXPORT jbyteArray JNICALL
264 Java_java_util_zip_ZipFile_getEntryBytes(JNIEnv *env,
265 jclass cls,
266 jlong zentry, jint type)
267 {
268 jzentry *ze = jlong_to_ptr(zentry);
269 int len = 0;
270 jbyteArray jba = NULL;
271 switch (type) {
272 case java_util_zip_ZipFile_JZENTRY_NAME:
273 if (ze->name != 0) {
274 len = (int)strlen(ze->name);
275 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
276 break;
277 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte *)ze->name);
278 }
279 break;
280 case java_util_zip_ZipFile_JZENTRY_EXTRA:
281 if (ze->extra != 0) {
282 unsigned char *bp = (unsigned char *)&ze->extra[0];
283 len = (bp[0] | (bp[1] << 8));
284 if (len <= 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
285 break;
286 (*env)->SetByteArrayRegion(env, jba, 0, len, &ze->extra[2]);
287 }
288 break;
289 case java_util_zip_ZipFile_JZENTRY_COMMENT:
290 if (ze->comment != 0) {
291 len = (int)strlen(ze->comment);
292 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
293 break;
294 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte*)ze->comment);
295 }
296 break;
297 }
298 return jba;
299 }
300
301 JNIEXPORT jint JNICALL
302 Java_java_util_zip_ZipFile_read(JNIEnv *env, jclass cls, jlong zfile,
303 jlong zentry, jlong pos, jbyteArray bytes,
304 jint off, jint len)
305 {
306 jzfile *zip = jlong_to_ptr(zfile);
307 char *msg;
308
309 #define BUFSIZE 8192
310 /* copy via tmp stack buffer: */
311 jbyte buf[BUFSIZE];
312
313 if (len > BUFSIZE) {
314 len = BUFSIZE;
315 }
316
317 ZIP_Lock(zip);
318 len = ZIP_Read(zip, jlong_to_ptr(zentry), pos, buf, len);
319 msg = zip->msg;
320 ZIP_Unlock(zip);
321 if (len != -1) {
322 (*env)->SetByteArrayRegion(env, bytes, off, len, buf);
323 }
324
325 if (len == -1) {
326 if (msg != 0) {
327 ThrowZipException(env, msg);
328 } else {
329 char errmsg[128];
330 sprintf(errmsg, "errno: %d, error: %s\n",
331 errno, "Error reading ZIP file");
332 JNU_ThrowIOExceptionWithLastError(env, errmsg);
333 }
334 }
335
336 return len;
337 }
338
339 /*
340 * Returns an array of strings representing the names of all entries
341 * that begin with "META-INF/" (case ignored). This native method is
342 * used in JarFile as an optimization when looking up manifest and
343 * signature file entries. Returns null if no entries were found.
344 */
345 JNIEXPORT jobjectArray JNICALL
346 Java_java_util_jar_JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj)
347 {
348 jlong zfile = (*env)->GetLongField(env, obj, jzfileID);
349 jzfile *zip;
350 int i, count;
351 jobjectArray result = 0;
352
353 if (zfile == 0) {
354 JNU_ThrowByName(env,
355 "java/lang/IllegalStateException", "zip file closed");
356 return NULL;
357 }
358 zip = jlong_to_ptr(zfile);
359
360 /* count the number of valid ZIP metanames */
361 count = 0;
362 if (zip->metanames != 0) {
363 for (i = 0; i < zip->metacount; i++) {
364 if (zip->metanames[i] != 0) {
365 count++;
366 }
367 }
368 }
369
370 /* If some names were found then build array of java strings */
371 if (count > 0) {
372 jclass cls = JNU_ClassString(env);
373 CHECK_NULL_RETURN(cls, NULL);
374 result = (*env)->NewObjectArray(env, count, cls, 0);
375 CHECK_NULL_RETURN(result, NULL);
376 if (result != 0) {
377 for (i = 0; i < count; i++) {
378 jstring str = (*env)->NewStringUTF(env, zip->metanames[i]);
379 if (str == 0) {
380 break;
381 }
382 (*env)->SetObjectArrayElement(env, result, i, str);
383 (*env)->DeleteLocalRef(env, str);
384 }
385 }
386 }
387 return result;
388 }
389
390 JNIEXPORT jstring JNICALL
391 Java_java_util_zip_ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile)
392 {
393 jzfile *zip = jlong_to_ptr(zfile);
394 char *msg = zip->msg;
395 if (msg == NULL) {
396 return NULL;
397 }
398 return JNU_NewStringPlatform(env, msg);
399 }