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 JNIEXPORT void JNICALL
Java_java_util_zip_ZipFile_initIDs(JNIEnv * env,jclass cls)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
ThrowZipException(JNIEnv * env,const char * msg)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
Java_java_util_zip_ZipFile_open(JNIEnv * env,jclass cls,jstring name,jint mode,jlong lastModified,jboolean usemmap)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
Java_java_util_zip_ZipFile_getTotal(JNIEnv * env,jclass cls,jlong zfile)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
Java_java_util_zip_ZipFile_startsWithLOC(JNIEnv * env,jclass cls,jlong zfile)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 jint JNICALL
Java_java_util_zip_ZipFile_getManifestNum(JNIEnv * env,jclass cls,jlong zfile)151 Java_java_util_zip_ZipFile_getManifestNum(JNIEnv *env, jclass cls, jlong zfile)
152 {
153 jzfile *zip = jlong_to_ptr(zfile);
154
155 return zip->manifestNum;
156 }
157
158 JNIEXPORT void JNICALL
Java_java_util_zip_ZipFile_close(JNIEnv * env,jclass cls,jlong zfile)159 Java_java_util_zip_ZipFile_close(JNIEnv *env, jclass cls, jlong zfile)
160 {
161 ZIP_Close(jlong_to_ptr(zfile));
162 }
163
164 JNIEXPORT jlong JNICALL
Java_java_util_zip_ZipFile_getEntry(JNIEnv * env,jclass cls,jlong zfile,jbyteArray name,jboolean addSlash)165 Java_java_util_zip_ZipFile_getEntry(JNIEnv *env, jclass cls, jlong zfile,
166 jbyteArray name, jboolean addSlash)
167 {
168 #define MAXNAME 1024
169 jzfile *zip = jlong_to_ptr(zfile);
170 jsize ulen = (*env)->GetArrayLength(env, name);
171 char buf[MAXNAME+2], *path;
172 jzentry *ze;
173
174 if (ulen > MAXNAME) {
175 path = malloc(ulen + 2);
176 if (path == 0) {
177 JNU_ThrowOutOfMemoryError(env, 0);
178 return 0;
179 }
180 } else {
181 path = buf;
182 }
183 (*env)->GetByteArrayRegion(env, name, 0, ulen, (jbyte *)path);
184 path[ulen] = '\0';
185 ze = ZIP_GetEntry2(zip, path, (jint)ulen, addSlash);
186 if (path != buf) {
187 free(path);
188 }
189 return ptr_to_jlong(ze);
190 }
191
192 JNIEXPORT void JNICALL
Java_java_util_zip_ZipFile_freeEntry(JNIEnv * env,jclass cls,jlong zfile,jlong zentry)193 Java_java_util_zip_ZipFile_freeEntry(JNIEnv *env, jclass cls, jlong zfile,
194 jlong zentry)
195 {
196 jzfile *zip = jlong_to_ptr(zfile);
197 jzentry *ze = jlong_to_ptr(zentry);
198 ZIP_FreeEntry(zip, ze);
199 }
200
201 JNIEXPORT jlong JNICALL
Java_java_util_zip_ZipFile_getNextEntry(JNIEnv * env,jclass cls,jlong zfile,jint n)202 Java_java_util_zip_ZipFile_getNextEntry(JNIEnv *env, jclass cls, jlong zfile,
203 jint n)
204 {
205 jzentry *ze = ZIP_GetNextEntry(jlong_to_ptr(zfile), n);
206 return ptr_to_jlong(ze);
207 }
208
209 JNIEXPORT jint JNICALL
Java_java_util_zip_ZipFile_getEntryMethod(JNIEnv * env,jclass cls,jlong zentry)210 Java_java_util_zip_ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry)
211 {
212 jzentry *ze = jlong_to_ptr(zentry);
213 return ze->csize != 0 ? DEFLATED : STORED;
214 }
215
216 JNIEXPORT jint JNICALL
Java_java_util_zip_ZipFile_getEntryFlag(JNIEnv * env,jclass cls,jlong zentry)217 Java_java_util_zip_ZipFile_getEntryFlag(JNIEnv *env, jclass cls, jlong zentry)
218 {
219 jzentry *ze = jlong_to_ptr(zentry);
220 return ze->flag;
221 }
222
223 JNIEXPORT jlong JNICALL
Java_java_util_zip_ZipFile_getEntryCSize(JNIEnv * env,jclass cls,jlong zentry)224 Java_java_util_zip_ZipFile_getEntryCSize(JNIEnv *env, jclass cls, jlong zentry)
225 {
226 jzentry *ze = jlong_to_ptr(zentry);
227 return ze->csize != 0 ? ze->csize : ze->size;
228 }
229
230 JNIEXPORT jlong JNICALL
Java_java_util_zip_ZipFile_getEntrySize(JNIEnv * env,jclass cls,jlong zentry)231 Java_java_util_zip_ZipFile_getEntrySize(JNIEnv *env, jclass cls, jlong zentry)
232 {
233 jzentry *ze = jlong_to_ptr(zentry);
234 return ze->size;
235 }
236
237 JNIEXPORT jlong JNICALL
Java_java_util_zip_ZipFile_getEntryTime(JNIEnv * env,jclass cls,jlong zentry)238 Java_java_util_zip_ZipFile_getEntryTime(JNIEnv *env, jclass cls, jlong zentry)
239 {
240 jzentry *ze = jlong_to_ptr(zentry);
241 return (jlong)ze->time & 0xffffffffUL;
242 }
243
244 JNIEXPORT jlong JNICALL
Java_java_util_zip_ZipFile_getEntryCrc(JNIEnv * env,jclass cls,jlong zentry)245 Java_java_util_zip_ZipFile_getEntryCrc(JNIEnv *env, jclass cls, jlong zentry)
246 {
247 jzentry *ze = jlong_to_ptr(zentry);
248 return (jlong)ze->crc & 0xffffffffUL;
249 }
250
251 JNIEXPORT jbyteArray JNICALL
Java_java_util_zip_ZipFile_getCommentBytes(JNIEnv * env,jclass cls,jlong zfile)252 Java_java_util_zip_ZipFile_getCommentBytes(JNIEnv *env,
253 jclass cls,
254 jlong zfile)
255 {
256 jzfile *zip = jlong_to_ptr(zfile);
257 jbyteArray jba = NULL;
258
259 if (zip->comment != NULL) {
260 if ((jba = (*env)->NewByteArray(env, zip->clen)) == NULL)
261 return NULL;
262 (*env)->SetByteArrayRegion(env, jba, 0, zip->clen, (jbyte*)zip->comment);
263 }
264 return jba;
265 }
266
267 JNIEXPORT jbyteArray JNICALL
Java_java_util_zip_ZipFile_getEntryBytes(JNIEnv * env,jclass cls,jlong zentry,jint type)268 Java_java_util_zip_ZipFile_getEntryBytes(JNIEnv *env,
269 jclass cls,
270 jlong zentry, jint type)
271 {
272 jzentry *ze = jlong_to_ptr(zentry);
273 int len = 0;
274 jbyteArray jba = NULL;
275 switch (type) {
276 case java_util_zip_ZipFile_JZENTRY_NAME:
277 if (ze->name != 0) {
278 len = (int)ze->nlen;
279 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
280 break;
281 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte *)ze->name);
282 }
283 break;
284 case java_util_zip_ZipFile_JZENTRY_EXTRA:
285 if (ze->extra != 0) {
286 unsigned char *bp = (unsigned char *)&ze->extra[0];
287 len = (bp[0] | (bp[1] << 8));
288 if (len <= 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
289 break;
290 (*env)->SetByteArrayRegion(env, jba, 0, len, &ze->extra[2]);
291 }
292 break;
293 case java_util_zip_ZipFile_JZENTRY_COMMENT:
294 if (ze->comment != 0) {
295 len = (int)strlen(ze->comment);
296 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
297 break;
298 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte*)ze->comment);
299 }
300 break;
301 }
302 return jba;
303 }
304
305 JNIEXPORT jint JNICALL
Java_java_util_zip_ZipFile_read(JNIEnv * env,jclass cls,jlong zfile,jlong zentry,jlong pos,jbyteArray bytes,jint off,jint len)306 Java_java_util_zip_ZipFile_read(JNIEnv *env, jclass cls, jlong zfile,
307 jlong zentry, jlong pos, jbyteArray bytes,
308 jint off, jint len)
309 {
310 jzfile *zip = jlong_to_ptr(zfile);
311 char *msg;
312
313 #define BUFSIZE 8192
314 /* copy via tmp stack buffer: */
315 jbyte buf[BUFSIZE];
316
317 if (len > BUFSIZE) {
318 len = BUFSIZE;
319 }
320
321 ZIP_Lock(zip);
322 len = ZIP_Read(zip, jlong_to_ptr(zentry), pos, buf, len);
323 msg = zip->msg;
324 ZIP_Unlock(zip);
325 if (len != -1) {
326 (*env)->SetByteArrayRegion(env, bytes, off, len, buf);
327 }
328
329 if (len == -1) {
330 if (msg != 0) {
331 ThrowZipException(env, msg);
332 } else {
333 char errmsg[128];
334 sprintf(errmsg, "errno: %d, error: %s\n",
335 errno, "Error reading ZIP file");
336 JNU_ThrowIOExceptionWithLastError(env, errmsg);
337 }
338 }
339
340 return len;
341 }
342
343 /*
344 * Returns an array of strings representing the names of all entries
345 * that begin with "META-INF/" (case ignored). This native method is
346 * used in JarFile as an optimization when looking up manifest and
347 * signature file entries. Returns null if no entries were found.
348 */
349 JNIEXPORT jobjectArray JNICALL
Java_java_util_jar_JarFile_getMetaInfEntryNames(JNIEnv * env,jobject obj)350 Java_java_util_jar_JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj)
351 {
352 jlong zfile = (*env)->GetLongField(env, obj, jzfileID);
353 jzfile *zip;
354 int i, count;
355 jobjectArray result = 0;
356
357 if (zfile == 0) {
358 JNU_ThrowByName(env,
359 "java/lang/IllegalStateException", "zip file closed");
360 return NULL;
361 }
362 zip = jlong_to_ptr(zfile);
363
364 /* count the number of valid ZIP metanames */
365 count = 0;
366 if (zip->metanames != 0) {
367 for (i = 0; i < zip->metacount; i++) {
368 if (zip->metanames[i] != 0) {
369 count++;
370 }
371 }
372 }
373
374 /* If some names were found then build array of java strings */
375 if (count > 0) {
376 jclass cls = JNU_ClassString(env);
377 CHECK_NULL_RETURN(cls, NULL);
378 result = (*env)->NewObjectArray(env, count, cls, 0);
379 CHECK_NULL_RETURN(result, NULL);
380 if (result != 0) {
381 for (i = 0; i < count; i++) {
382 jstring str = (*env)->NewStringUTF(env, zip->metanames[i]);
383 if (str == 0) {
384 break;
385 }
386 (*env)->SetObjectArrayElement(env, result, i, str);
387 (*env)->DeleteLocalRef(env, str);
388 }
389 }
390 }
391 return result;
392 }
393
394 JNIEXPORT jstring JNICALL
Java_java_util_zip_ZipFile_getZipMessage(JNIEnv * env,jclass cls,jlong zfile)395 Java_java_util_zip_ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile)
396 {
397 jzfile *zip = jlong_to_ptr(zfile);
398 char *msg = zip->msg;
399 if (msg == NULL) {
400 return NULL;
401 }
402 return JNU_NewStringPlatform(env, msg);
403 }
404