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 <nativehelper/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 int OPEN_READ = java_util_zip_ZipFile_OPEN_READ; 59 static int OPEN_DELETE = java_util_zip_ZipFile_OPEN_DELETE; 60 61 static void ZipFile_initIDs(JNIEnv *env) 62 { 63 jclass cls = (*env)->FindClass(env, "java/util/zip/ZipFile"); 64 jzfileID = (*env)->GetFieldID(env, cls, "jzfile", "J"); 65 assert(jzfileID != 0); 66 } 67 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 jint JNICALL 160 ZipFile_getFileDescriptor(JNIEnv *env, jclass cls, jlong zfile) { 161 jzfile *zip = jlong_to_ptr(zfile); 162 return zip->zfd; 163 } 164 165 JNIEXPORT jlong JNICALL 166 ZipFile_getEntry(JNIEnv *env, jclass cls, jlong zfile, 167 jbyteArray name, jboolean addSlash) 168 { 169 #define MAXNAME 1024 170 jzfile *zip = jlong_to_ptr(zfile); 171 jsize ulen = (*env)->GetArrayLength(env, name); 172 char buf[MAXNAME+2], *path; 173 jzentry *ze; 174 175 if (ulen > MAXNAME) { 176 path = malloc(ulen + 2); 177 if (path == 0) { 178 JNU_ThrowOutOfMemoryError(env, 0); 179 return 0; 180 } 181 } else { 182 path = buf; 183 } 184 (*env)->GetByteArrayRegion(env, name, 0, ulen, (jbyte *)path); 185 path[ulen] = '\0'; 186 ze = ZIP_GetEntry2(zip, path, (jint)ulen, addSlash); 187 if (path != buf) { 188 free(path); 189 } 190 return ptr_to_jlong(ze); 191 } 192 193 JNIEXPORT void JNICALL 194 ZipFile_freeEntry(JNIEnv *env, jclass cls, jlong zfile, 195 jlong zentry) 196 { 197 jzfile *zip = jlong_to_ptr(zfile); 198 jzentry *ze = jlong_to_ptr(zentry); 199 ZIP_FreeEntry(zip, ze); 200 } 201 202 JNIEXPORT jlong JNICALL 203 ZipFile_getNextEntry(JNIEnv *env, jclass cls, jlong zfile, 204 jint n) 205 { 206 jzentry *ze = ZIP_GetNextEntry(jlong_to_ptr(zfile), n); 207 return ptr_to_jlong(ze); 208 } 209 210 JNIEXPORT jint JNICALL 211 ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry) 212 { 213 jzentry *ze = jlong_to_ptr(zentry); 214 return ze->csize != 0 ? DEFLATED : STORED; 215 } 216 217 JNIEXPORT jint JNICALL 218 ZipFile_getEntryFlag(JNIEnv *env, jclass cls, jlong zentry) 219 { 220 jzentry *ze = jlong_to_ptr(zentry); 221 return ze->flag; 222 } 223 224 JNIEXPORT jlong JNICALL 225 ZipFile_getEntryCSize(JNIEnv *env, jclass cls, jlong zentry) 226 { 227 jzentry *ze = jlong_to_ptr(zentry); 228 return ze->csize != 0 ? ze->csize : ze->size; 229 } 230 231 JNIEXPORT jlong JNICALL 232 ZipFile_getEntrySize(JNIEnv *env, jclass cls, jlong zentry) 233 { 234 jzentry *ze = jlong_to_ptr(zentry); 235 return ze->size; 236 } 237 238 JNIEXPORT jlong JNICALL 239 ZipFile_getEntryTime(JNIEnv *env, jclass cls, jlong zentry) 240 { 241 jzentry *ze = jlong_to_ptr(zentry); 242 return (jlong)ze->time & 0xffffffffUL; 243 } 244 245 JNIEXPORT jlong JNICALL 246 ZipFile_getEntryCrc(JNIEnv *env, jclass cls, jlong zentry) 247 { 248 jzentry *ze = jlong_to_ptr(zentry); 249 return (jlong)ze->crc & 0xffffffffUL; 250 } 251 252 JNIEXPORT jbyteArray JNICALL 253 ZipFile_getCommentBytes(JNIEnv *env, jclass cls, jlong zfile) 254 { 255 jzfile *zip = jlong_to_ptr(zfile); 256 jbyteArray jba = NULL; 257 258 if (zip->comment != NULL) { 259 if ((jba = (*env)->NewByteArray(env, zip->clen)) == NULL) 260 return NULL; 261 (*env)->SetByteArrayRegion(env, jba, 0, zip->clen, (jbyte*)zip->comment); 262 } 263 return jba; 264 } 265 266 JNIEXPORT jbyteArray JNICALL 267 ZipFile_getEntryBytes(JNIEnv *env, jclass cls, jlong zentry, jint type) 268 { 269 jzentry *ze = jlong_to_ptr(zentry); 270 int len = 0; 271 jbyteArray jba = NULL; 272 switch (type) { 273 case java_util_zip_ZipFile_JZENTRY_NAME: 274 if (ze->name != 0) { 275 len = (int)ze->nlen; 276 if (len == 0 || (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 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 snprintf(errmsg, sizeof(errmsg), "errno: %d, error: %s\n", errno, 332 "Error reading ZIP file"); 333 JNU_ThrowIOExceptionWithLastError(env, errmsg); 334 } 335 } 336 337 return len; 338 } 339 340 JNIEXPORT jstring JNICALL 341 ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile) 342 { 343 jzfile *zip = jlong_to_ptr(zfile); 344 char *msg = zip->msg; 345 if (msg == NULL) { 346 return NULL; 347 } 348 return JNU_NewStringPlatform(env, msg); 349 } 350 351 JNIEXPORT jobjectArray JNICALL 352 JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj) 353 { 354 jlong zfile = (*env)->GetLongField(env, obj, jzfileID); 355 jzfile *zip; 356 int i, count; 357 jobjectArray result = 0; 358 359 if (zfile == 0) { 360 JNU_ThrowByName(env, 361 "java/lang/IllegalStateException", "zip file closed"); 362 return NULL; 363 } 364 zip = jlong_to_ptr(zfile); 365 366 /* count the number of valid ZIP metanames */ 367 count = 0; 368 if (zip->metanames != 0) { 369 for (i = 0; i < zip->metacount; i++) { 370 if (zip->metanames[i] != 0) { 371 count++; 372 } 373 } 374 } 375 376 /* If some names were found then build array of java strings */ 377 if (count > 0) { 378 jclass cls = (*env)->FindClass(env, "java/lang/String"); 379 result = (*env)->NewObjectArray(env, count, cls, 0); 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 static JNINativeMethod gMethods[] = { 395 NATIVE_METHOD(ZipFile, getFileDescriptor, "(J)I"), 396 NATIVE_METHOD(ZipFile, getEntry, "(J[BZ)J"), 397 NATIVE_METHOD(ZipFile, freeEntry, "(JJ)V"), 398 NATIVE_METHOD(ZipFile, getNextEntry, "(JI)J"), 399 NATIVE_METHOD(ZipFile, close, "(J)V"), 400 NATIVE_METHOD(ZipFile, open, "(Ljava/lang/String;IJZ)J"), 401 NATIVE_METHOD(ZipFile, getTotal, "(J)I"), 402 NATIVE_METHOD(ZipFile, startsWithLOC, "(J)Z"), 403 NATIVE_METHOD(ZipFile, read, "(JJJ[BII)I"), 404 NATIVE_METHOD(ZipFile, getEntryTime, "(J)J"), 405 NATIVE_METHOD(ZipFile, getEntryCrc, "(J)J"), 406 NATIVE_METHOD(ZipFile, getEntryCSize, "(J)J"), 407 NATIVE_METHOD(ZipFile, getEntrySize, "(J)J"), 408 NATIVE_METHOD(ZipFile, getEntryMethod, "(J)I"), 409 NATIVE_METHOD(ZipFile, getEntryFlag, "(J)I"), 410 NATIVE_METHOD(ZipFile, getCommentBytes, "(J)[B"), 411 NATIVE_METHOD(ZipFile, getEntryBytes, "(JI)[B"), 412 NATIVE_METHOD(ZipFile, getZipMessage, "(J)Ljava/lang/String;"), 413 }; 414 415 static JNINativeMethod gJarFileMethods[] = { 416 NATIVE_METHOD(JarFile, getMetaInfEntryNames, "()[Ljava/lang/String;"), 417 }; 418 419 void register_java_util_zip_ZipFile(JNIEnv* env) { 420 jniRegisterNativeMethods(env, "java/util/zip/ZipFile", gMethods, NELEM(gMethods)); 421 ZipFile_initIDs(env); 422 423 jniRegisterNativeMethods(env, "java/util/jar/JarFile", gJarFileMethods, NELEM(gJarFileMethods)); 424 } 425
