java_util_zip_ZipFile.c revision ff96d13467fa65856c19aaf06b151ce60e0edd8f 
1/*
2 * Copyright (c) 1998, 2010, 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 "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
56static jfieldID jzfileID;
57
58static void ZipFile_initIDs(JNIEnv *env)
59{
60    jclass cls = (*env)->FindClass(env, "java/util/zip/ZipFile");
61    jzfileID = (*env)->GetFieldID(env, cls, "jzfile", "J");
62    assert(jzfileID != 0);
63}
64
65
66static int OPEN_READ = java_util_zip_ZipFile_OPEN_READ;
67static int OPEN_DELETE = java_util_zip_ZipFile_OPEN_DELETE;
68
69static void
70ThrowZipException(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
86JNIEXPORT jlong JNICALL
87ZipFile_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    if (mode & OPEN_DELETE) flag |= JVM_O_DELETE;
99
100    if (path != 0) {
101        zip = ZIP_Get_From_Cache(path, &msg, lastModified);
102        if (zip == 0 && msg == 0) {
103            ZFILE zfd = 0;
104#ifdef WIN32
105            zfd = winFileHandleOpen(env, name, flag);
106            if (zfd == -1) {
107                /* Exception already pending. */
108                goto finally;
109            }
110#else
111            zfd = JVM_Open(path, flag, 0);
112            if (zfd < 0) {
113                throwFileNotFoundException(env, name);
114                goto finally;
115            }
116#endif
117            zip = ZIP_Put_In_Cache0(path, zfd, &msg, lastModified, usemmap);
118        }
119
120        if (zip != 0) {
121            result = ptr_to_jlong(zip);
122        } else if (msg != 0) {
123            ThrowZipException(env, msg);
124            free(msg);
125        } else if (errno == ENOMEM) {
126            JNU_ThrowOutOfMemoryError(env, 0);
127        } else {
128            ThrowZipException(env, "error in opening zip file");
129        }
130finally:
131        JNU_ReleaseStringPlatformChars(env, name, path);
132    }
133    return result;
134}
135
136JNIEXPORT jint JNICALL
137ZipFile_getTotal(JNIEnv *env, jclass cls, jlong zfile)
138{
139    jzfile *zip = jlong_to_ptr(zfile);
140
141    return zip->total;
142}
143
144JNIEXPORT jboolean JNICALL
145ZipFile_startsWithLOC(JNIEnv *env, jclass cls, jlong zfile)
146{
147    jzfile *zip = jlong_to_ptr(zfile);
148
149    return zip->locsig;
150}
151
152JNIEXPORT void JNICALL
153ZipFile_close(JNIEnv *env, jclass cls, jlong zfile)
154{
155    ZIP_Close(jlong_to_ptr(zfile));
156}
157
158JNIEXPORT jlong JNICALL
159ZipFile_getEntry(JNIEnv *env, jclass cls, jlong zfile,
160                 jbyteArray name, jboolean addSlash)
161{
162#define MAXNAME 1024
163    jzfile *zip = jlong_to_ptr(zfile);
164    jsize ulen = (*env)->GetArrayLength(env, name);
165    char buf[MAXNAME+2], *path;
166    jzentry *ze;
167
168    if (ulen > MAXNAME) {
169        path = malloc(ulen + 2);
170        if (path == 0) {
171            JNU_ThrowOutOfMemoryError(env, 0);
172            return 0;
173        }
174    } else {
175        path = buf;
176    }
177    (*env)->GetByteArrayRegion(env, name, 0, ulen, (jbyte *)path);
178    path[ulen] = '\0';
179    if (addSlash == JNI_FALSE) {
180        ze = ZIP_GetEntry(zip, path, 0);
181    } else {
182        ze = ZIP_GetEntry(zip, path, (jint)ulen);
183    }
184    if (path != buf) {
185        free(path);
186    }
187    return ptr_to_jlong(ze);
188}
189
190JNIEXPORT void JNICALL
191ZipFile_freeEntry(JNIEnv *env, jclass cls, jlong zfile,
192                                    jlong zentry)
193{
194    jzfile *zip = jlong_to_ptr(zfile);
195    jzentry *ze = jlong_to_ptr(zentry);
196    ZIP_FreeEntry(zip, ze);
197}
198
199JNIEXPORT jlong JNICALL
200ZipFile_getNextEntry(JNIEnv *env, jclass cls, jlong zfile,
201                                        jint n)
202{
203    jzentry *ze = ZIP_GetNextEntry(jlong_to_ptr(zfile), n);
204    return ptr_to_jlong(ze);
205}
206
207JNIEXPORT jint JNICALL
208ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry)
209{
210    jzentry *ze = jlong_to_ptr(zentry);
211    return ze->csize != 0 ? DEFLATED : STORED;
212}
213
214JNIEXPORT jint JNICALL
215ZipFile_getEntryFlag(JNIEnv *env, jclass cls, jlong zentry)
216{
217    jzentry *ze = jlong_to_ptr(zentry);
218    return ze->flag;
219}
220
221JNIEXPORT jlong JNICALL
222ZipFile_getEntryCSize(JNIEnv *env, jclass cls, jlong zentry)
223{
224    jzentry *ze = jlong_to_ptr(zentry);
225    return ze->csize != 0 ? ze->csize : ze->size;
226}
227
228JNIEXPORT jlong JNICALL
229ZipFile_getEntrySize(JNIEnv *env, jclass cls, jlong zentry)
230{
231    jzentry *ze = jlong_to_ptr(zentry);
232    return ze->size;
233}
234
235JNIEXPORT jlong JNICALL
236ZipFile_getEntryTime(JNIEnv *env, jclass cls, jlong zentry)
237{
238    jzentry *ze = jlong_to_ptr(zentry);
239    return (jlong)ze->time & 0xffffffffUL;
240}
241
242JNIEXPORT jlong JNICALL
243ZipFile_getEntryCrc(JNIEnv *env, jclass cls, jlong zentry)
244{
245    jzentry *ze = jlong_to_ptr(zentry);
246    return (jlong)ze->crc & 0xffffffffUL;
247}
248
249JNIEXPORT jbyteArray JNICALL
250ZipFile_getCommentBytes(JNIEnv *env, jclass cls, 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
263JNIEXPORT jbyteArray JNICALL
264ZipFile_getEntryBytes(JNIEnv *env, jclass cls, jlong zentry, jint type)
265{
266    jzentry *ze = jlong_to_ptr(zentry);
267    int len = 0;
268    jbyteArray jba = NULL;
269    switch (type) {
270    case java_util_zip_ZipFile_JZENTRY_NAME:
271        if (ze->name != 0) {
272            len = (int)strlen(ze->name);
273            if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
274                break;
275            (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte *)ze->name);
276        }
277        break;
278    case java_util_zip_ZipFile_JZENTRY_EXTRA:
279        if (ze->extra != 0) {
280            unsigned char *bp = (unsigned char *)&ze->extra[0];
281            len = (bp[0] | (bp[1] << 8));
282            if (len <= 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
283                break;
284            (*env)->SetByteArrayRegion(env, jba, 0, len, &ze->extra[2]);
285        }
286        break;
287    case java_util_zip_ZipFile_JZENTRY_COMMENT:
288        if (ze->comment != 0) {
289            len = (int)strlen(ze->comment);
290            if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
291                break;
292            (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte*)ze->comment);
293        }
294        break;
295    }
296    return jba;
297}
298
299JNIEXPORT jint JNICALL
300ZipFile_read(JNIEnv *env, jclass cls, jlong zfile,
301             jlong zentry, jlong pos, jbyteArray bytes,
302             jint off, jint len)
303{
304    jzfile *zip = jlong_to_ptr(zfile);
305    char *msg;
306
307#define BUFSIZE 8192
308    /* copy via tmp stack buffer: */
309    jbyte buf[BUFSIZE];
310
311    if (len > BUFSIZE) {
312        len = BUFSIZE;
313    }
314
315    ZIP_Lock(zip);
316    len = ZIP_Read(zip, jlong_to_ptr(zentry), pos, buf, len);
317    msg = zip->msg;
318    ZIP_Unlock(zip);
319    if (len != -1) {
320        (*env)->SetByteArrayRegion(env, bytes, off, len, buf);
321    }
322
323    if (len == -1) {
324        if (msg != 0) {
325            ThrowZipException(env, msg);
326        } else {
327            char errmsg[128];
328            snprintf(errmsg, sizeof(errmsg), "errno: %d, error: %s\n", errno,
329                     "Error reading ZIP file");
330            JNU_ThrowIOExceptionWithLastError(env, errmsg);
331        }
332    }
333
334    return len;
335}
336
337JNIEXPORT jstring JNICALL
338ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile)
339{
340    jzfile *zip = jlong_to_ptr(zfile);
341    char *msg = zip->msg;
342    if (msg == NULL) {
343        return NULL;
344    }
345    return JNU_NewStringPlatform(env, msg);
346}
347
348JNIEXPORT jobjectArray JNICALL
349JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj)
350{
351    jlong zfile = (*env)->GetLongField(env, obj, jzfileID);
352    jzfile *zip;
353    int i, count;
354    jobjectArray result = 0;
355
356    if (zfile == 0) {
357        JNU_ThrowByName(env,
358                        "java/lang/IllegalStateException", "zip file closed");
359        return NULL;
360    }
361    zip = jlong_to_ptr(zfile);
362
363    /* count the number of valid ZIP metanames */
364    count = 0;
365    if (zip->metanames != 0) {
366        for (i = 0; i < zip->metacount; i++) {
367            if (zip->metanames[i] != 0) {
368                count++;
369            }
370        }
371    }
372
373    /* If some names were found then build array of java strings */
374    if (count > 0) {
375        jclass cls = (*env)->FindClass(env, "java/lang/String");
376        result = (*env)->NewObjectArray(env, count, cls, 0);
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
391static JNINativeMethod gMethods[] = {
392  NATIVE_METHOD(ZipFile, getEntry, "(J[BZ)J"),
393  NATIVE_METHOD(ZipFile, freeEntry, "(JJ)V"),
394  NATIVE_METHOD(ZipFile, getNextEntry, "(JI)J"),
395  NATIVE_METHOD(ZipFile, close, "(J)V"),
396  NATIVE_METHOD(ZipFile, open, "(Ljava/lang/String;IJZ)J"),
397  NATIVE_METHOD(ZipFile, getTotal, "(J)I"),
398  NATIVE_METHOD(ZipFile, startsWithLOC, "(J)Z"),
399  NATIVE_METHOD(ZipFile, read, "(JJJ[BII)I"),
400  NATIVE_METHOD(ZipFile, getEntryTime, "(J)J"),
401  NATIVE_METHOD(ZipFile, getEntryCrc, "(J)J"),
402  NATIVE_METHOD(ZipFile, getEntryCSize, "(J)J"),
403  NATIVE_METHOD(ZipFile, getEntrySize, "(J)J"),
404  NATIVE_METHOD(ZipFile, getEntryMethod, "(J)I"),
405  NATIVE_METHOD(ZipFile, getEntryFlag, "(J)I"),
406  NATIVE_METHOD(ZipFile, getCommentBytes, "(J)[B"),
407  NATIVE_METHOD(ZipFile, getEntryBytes, "(JI)[B"),
408  NATIVE_METHOD(ZipFile, getZipMessage, "(J)Ljava/lang/String;"),
409};
410
411static JNINativeMethod gJarFileMethods[] = {
412  NATIVE_METHOD(JarFile, getMetaInfEntryNames, "()[Ljava/lang/String;"),
413};
414
415void register_java_util_zip_ZipFile(JNIEnv* env) {
416  jniRegisterNativeMethods(env, "java/util/zip/ZipFile", gMethods, NELEM(gMethods));
417  ZipFile_initIDs(env);
418
419  jniRegisterNativeMethods(env, "java/util/jar/JarFile", gJarFileMethods, NELEM(gJarFileMethods));
420}
421