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 56 static jfieldID jzfileID; 57 58 static 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 66 static int OPEN_READ = java_util_zip_ZipFile_OPEN_READ; 67 static int OPEN_DELETE = java_util_zip_ZipFile_OPEN_DELETE; 68 69 static void 70 ThrowZipException(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 86 JNIEXPORT jlong JNICALL 87 ZipFile_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 // Android changed, JVM_O_DELETE/unlink is problematic, see b/28901232. 99 //if (mode & OPEN_DELETE) flag |= JVM_O_DELETE; 100 101 if (path != 0) { 102 zip = ZIP_Get_From_Cache(path, &msg, lastModified); 103 if (zip == 0 && msg == 0) { 104 ZFILE zfd = 0; 105 #ifdef WIN32 106 zfd = winFileHandleOpen(env, name, flag); 107 if (zfd == -1) { 108 /* Exception already pending. */ 109 goto finally; 110 } 111 #else 112 zfd = JVM_Open(path, flag, 0); 113 if (zfd < 0) { 114 throwFileNotFoundException(env, name); 115 goto finally; 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 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 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 ZipFile_close(JNIEnv *env, jclass cls, jlong zfile) 155 { 156 ZIP_Close(jlong_to_ptr(zfile)); 157 } 158 159 JNIEXPORT jlong JNICALL 160 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 if (addSlash == JNI_FALSE) { 181 ze = ZIP_GetEntry(zip, path, 0); 182 } else { 183 ze = ZIP_GetEntry(zip, path, (jint)ulen); 184 } 185 if (path != buf) { 186 free(path); 187 } 188 return ptr_to_jlong(ze); 189 } 190 191 JNIEXPORT void JNICALL 192 ZipFile_freeEntry(JNIEnv *env, jclass cls, jlong zfile, 193 jlong zentry) 194 { 195 jzfile *zip = jlong_to_ptr(zfile); 196 jzentry *ze = jlong_to_ptr(zentry); 197 ZIP_FreeEntry(zip, ze); 198 } 199 200 JNIEXPORT jlong JNICALL 201 ZipFile_getNextEntry(JNIEnv *env, jclass cls, jlong zfile, 202 jint n) 203 { 204 jzentry *ze = ZIP_GetNextEntry(jlong_to_ptr(zfile), n); 205 return ptr_to_jlong(ze); 206 } 207 208 JNIEXPORT jint JNICALL 209 ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry) 210 { 211 jzentry *ze = jlong_to_ptr(zentry); 212 return ze->csize != 0 ? DEFLATED : STORED; 213 } 214 215 JNIEXPORT jint JNICALL 216 ZipFile_getEntryFlag(JNIEnv *env, jclass cls, jlong zentry) 217 { 218 jzentry *ze = jlong_to_ptr(zentry); 219 return ze->flag; 220 } 221 222 JNIEXPORT jlong JNICALL 223 ZipFile_getEntryCSize(JNIEnv *env, jclass cls, jlong zentry) 224 { 225 jzentry *ze = jlong_to_ptr(zentry); 226 return ze->csize != 0 ? ze->csize : ze->size; 227 } 228 229 JNIEXPORT jlong JNICALL 230 ZipFile_getEntrySize(JNIEnv *env, jclass cls, jlong zentry) 231 { 232 jzentry *ze = jlong_to_ptr(zentry); 233 return ze->size; 234 } 235 236 JNIEXPORT jlong JNICALL 237 ZipFile_getEntryTime(JNIEnv *env, jclass cls, jlong zentry) 238 { 239 jzentry *ze = jlong_to_ptr(zentry); 240 return (jlong)ze->time & 0xffffffffUL; 241 } 242 243 JNIEXPORT jlong JNICALL 244 ZipFile_getEntryCrc(JNIEnv *env, jclass cls, jlong zentry) 245 { 246 jzentry *ze = jlong_to_ptr(zentry); 247 return (jlong)ze->crc & 0xffffffffUL; 248 } 249 250 JNIEXPORT jbyteArray JNICALL 251 ZipFile_getCommentBytes(JNIEnv *env, jclass cls, jlong zfile) 252 { 253 jzfile *zip = jlong_to_ptr(zfile); 254 jbyteArray jba = NULL; 255 256 if (zip->comment != NULL) { 257 if ((jba = (*env)->NewByteArray(env, zip->clen)) == NULL) 258 return NULL; 259 (*env)->SetByteArrayRegion(env, jba, 0, zip->clen, (jbyte*)zip->comment); 260 } 261 return jba; 262 } 263 264 JNIEXPORT jbyteArray JNICALL 265 ZipFile_getEntryBytes(JNIEnv *env, jclass cls, 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)strlen(ze->name); 274 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL) 275 break; 276 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte *)ze->name); 277 } 278 break; 279 case java_util_zip_ZipFile_JZENTRY_EXTRA: 280 if (ze->extra != 0) { 281 unsigned char *bp = (unsigned char *)&ze->extra[0]; 282 len = (bp[0] | (bp[1] << 8)); 283 if (len <= 0 || (jba = (*env)->NewByteArray(env, len)) == NULL) 284 break; 285 (*env)->SetByteArrayRegion(env, jba, 0, len, &ze->extra[2]); 286 } 287 break; 288 case java_util_zip_ZipFile_JZENTRY_COMMENT: 289 if (ze->comment != 0) { 290 len = (int)strlen(ze->comment); 291 if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL) 292 break; 293 (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte*)ze->comment); 294 } 295 break; 296 } 297 return jba; 298 } 299 300 JNIEXPORT jint JNICALL 301 ZipFile_read(JNIEnv *env, jclass cls, jlong zfile, 302 jlong zentry, jlong pos, jbyteArray bytes, 303 jint off, jint len) 304 { 305 jzfile *zip = jlong_to_ptr(zfile); 306 char *msg; 307 308 #define BUFSIZE 8192 309 /* copy via tmp stack buffer: */ 310 jbyte buf[BUFSIZE]; 311 312 if (len > BUFSIZE) { 313 len = BUFSIZE; 314 } 315 316 ZIP_Lock(zip); 317 len = ZIP_Read(zip, jlong_to_ptr(zentry), pos, buf, len); 318 msg = zip->msg; 319 ZIP_Unlock(zip); 320 if (len != -1) { 321 (*env)->SetByteArrayRegion(env, bytes, off, len, buf); 322 } 323 324 if (len == -1) { 325 if (msg != 0) { 326 ThrowZipException(env, msg); 327 } else { 328 char errmsg[128]; 329 snprintf(errmsg, sizeof(errmsg), "errno: %d, error: %s\n", errno, 330 "Error reading ZIP file"); 331 JNU_ThrowIOExceptionWithLastError(env, errmsg); 332 } 333 } 334 335 return len; 336 } 337 338 JNIEXPORT jstring JNICALL 339 ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile) 340 { 341 jzfile *zip = jlong_to_ptr(zfile); 342 char *msg = zip->msg; 343 if (msg == NULL) { 344 return NULL; 345 } 346 return JNU_NewStringPlatform(env, msg); 347 } 348 349 JNIEXPORT jobjectArray JNICALL 350 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 = (*env)->FindClass(env, "java/lang/String"); 377 result = (*env)->NewObjectArray(env, count, cls, 0); 378 if (result != 0) { 379 for (i = 0; i < count; i++) { 380 jstring str = (*env)->NewStringUTF(env, zip->metanames[i]); 381 if (str == 0) { 382 break; 383 } 384 (*env)->SetObjectArrayElement(env, result, i, str); 385 (*env)->DeleteLocalRef(env, str); 386 } 387 } 388 } 389 return result; 390 } 391 392 static JNINativeMethod gMethods[] = { 393 NATIVE_METHOD(ZipFile, getEntry, "(J[BZ)J"), 394 NATIVE_METHOD(ZipFile, freeEntry, "(JJ)V"), 395 NATIVE_METHOD(ZipFile, getNextEntry, "(JI)J"), 396 NATIVE_METHOD(ZipFile, close, "(J)V"), 397 NATIVE_METHOD(ZipFile, open, "(Ljava/lang/String;IJZ)J"), 398 NATIVE_METHOD(ZipFile, getTotal, "(J)I"), 399 NATIVE_METHOD(ZipFile, startsWithLOC, "(J)Z"), 400 NATIVE_METHOD(ZipFile, read, "(JJJ[BII)I"), 401 NATIVE_METHOD(ZipFile, getEntryTime, "(J)J"), 402 NATIVE_METHOD(ZipFile, getEntryCrc, "(J)J"), 403 NATIVE_METHOD(ZipFile, getEntryCSize, "(J)J"), 404 NATIVE_METHOD(ZipFile, getEntrySize, "(J)J"), 405 NATIVE_METHOD(ZipFile, getEntryMethod, "(J)I"), 406 NATIVE_METHOD(ZipFile, getEntryFlag, "(J)I"), 407 NATIVE_METHOD(ZipFile, getCommentBytes, "(J)[B"), 408 NATIVE_METHOD(ZipFile, getEntryBytes, "(JI)[B"), 409 NATIVE_METHOD(ZipFile, getZipMessage, "(J)Ljava/lang/String;"), 410 }; 411 412 static JNINativeMethod gJarFileMethods[] = { 413 NATIVE_METHOD(JarFile, getMetaInfEntryNames, "()[Ljava/lang/String;"), 414 }; 415 416 void register_java_util_zip_ZipFile(JNIEnv* env) { 417 jniRegisterNativeMethods(env, "java/util/zip/ZipFile", gMethods, NELEM(gMethods)); 418 ZipFile_initIDs(env); 419 420 jniRegisterNativeMethods(env, "java/util/jar/JarFile", gJarFileMethods, NELEM(gJarFileMethods)); 421 } 422
