The Android Open Source Project | 7c1b96a | 2008-10-21 07:00:00 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | // |
| 18 | // Access to entries in a Zip archive. |
| 19 | // |
| 20 | |
| 21 | #define LOG_TAG "zip" |
| 22 | |
| 23 | #include "utils/ZipEntry.h" |
| 24 | #include "utils/Log.h" |
| 25 | |
| 26 | #include <stdio.h> |
| 27 | #include <string.h> |
| 28 | #include <assert.h> |
| 29 | |
| 30 | using namespace android; |
| 31 | |
| 32 | /* |
| 33 | * Initialize a new ZipEntry structure from a FILE* positioned at a |
| 34 | * CentralDirectoryEntry. |
| 35 | * |
| 36 | * On exit, the file pointer will be at the start of the next CDE or |
| 37 | * at the EOCD. |
| 38 | */ |
| 39 | status_t ZipEntry::initFromCDE(FILE* fp) |
| 40 | { |
| 41 | status_t result; |
| 42 | long posn; |
| 43 | bool hasDD; |
| 44 | |
| 45 | //LOGV("initFromCDE ---\n"); |
| 46 | |
| 47 | /* read the CDE */ |
| 48 | result = mCDE.read(fp); |
| 49 | if (result != NO_ERROR) { |
| 50 | LOGD("mCDE.read failed\n"); |
| 51 | return result; |
| 52 | } |
| 53 | |
| 54 | //mCDE.dump(); |
| 55 | |
| 56 | /* using the info in the CDE, go load up the LFH */ |
| 57 | posn = ftell(fp); |
| 58 | if (fseek(fp, mCDE.mLocalHeaderRelOffset, SEEK_SET) != 0) { |
| 59 | LOGD("local header seek failed (%ld)\n", |
| 60 | mCDE.mLocalHeaderRelOffset); |
| 61 | return UNKNOWN_ERROR; |
| 62 | } |
| 63 | |
| 64 | result = mLFH.read(fp); |
| 65 | if (result != NO_ERROR) { |
| 66 | LOGD("mLFH.read failed\n"); |
| 67 | return result; |
| 68 | } |
| 69 | |
| 70 | if (fseek(fp, posn, SEEK_SET) != 0) |
| 71 | return UNKNOWN_ERROR; |
| 72 | |
| 73 | //mLFH.dump(); |
| 74 | |
| 75 | /* |
| 76 | * We *might* need to read the Data Descriptor at this point and |
| 77 | * integrate it into the LFH. If this bit is set, the CRC-32, |
| 78 | * compressed size, and uncompressed size will be zero. In practice |
| 79 | * these seem to be rare. |
| 80 | */ |
| 81 | hasDD = (mLFH.mGPBitFlag & kUsesDataDescr) != 0; |
| 82 | if (hasDD) { |
| 83 | // do something clever |
| 84 | //LOGD("+++ has data descriptor\n"); |
| 85 | } |
| 86 | |
| 87 | /* |
| 88 | * Sanity-check the LFH. Note that this will fail if the "kUsesDataDescr" |
| 89 | * flag is set, because the LFH is incomplete. (Not a problem, since we |
| 90 | * prefer the CDE values.) |
| 91 | */ |
| 92 | if (!hasDD && !compareHeaders()) { |
| 93 | LOGW("WARNING: header mismatch\n"); |
| 94 | // keep going? |
| 95 | } |
| 96 | |
| 97 | /* |
| 98 | * If the mVersionToExtract is greater than 20, we may have an |
| 99 | * issue unpacking the record -- could be encrypted, compressed |
| 100 | * with something we don't support, or use Zip64 extensions. We |
| 101 | * can defer worrying about that to when we're extracting data. |
| 102 | */ |
| 103 | |
| 104 | return NO_ERROR; |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * Initialize a new entry. Pass in the file name and an optional comment. |
| 109 | * |
| 110 | * Initializes the CDE and the LFH. |
| 111 | */ |
| 112 | void ZipEntry::initNew(const char* fileName, const char* comment) |
| 113 | { |
| 114 | assert(fileName != NULL && *fileName != '\0'); // name required |
| 115 | |
| 116 | /* most fields are properly initialized by constructor */ |
| 117 | mCDE.mVersionMadeBy = kDefaultMadeBy; |
| 118 | mCDE.mVersionToExtract = kDefaultVersion; |
| 119 | mCDE.mCompressionMethod = kCompressStored; |
| 120 | mCDE.mFileNameLength = strlen(fileName); |
| 121 | if (comment != NULL) |
| 122 | mCDE.mFileCommentLength = strlen(comment); |
| 123 | mCDE.mExternalAttrs = 0x81b60020; // matches what WinZip does |
| 124 | |
| 125 | if (mCDE.mFileNameLength > 0) { |
| 126 | mCDE.mFileName = new unsigned char[mCDE.mFileNameLength+1]; |
| 127 | strcpy((char*) mCDE.mFileName, fileName); |
| 128 | } |
| 129 | if (mCDE.mFileCommentLength > 0) { |
| 130 | /* TODO: stop assuming null-terminated ASCII here? */ |
| 131 | mCDE.mFileComment = new unsigned char[mCDE.mFileCommentLength+1]; |
| 132 | strcpy((char*) mCDE.mFileComment, comment); |
| 133 | } |
| 134 | |
| 135 | copyCDEtoLFH(); |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * Initialize a new entry, starting with the ZipEntry from a different |
| 140 | * archive. |
| 141 | * |
| 142 | * Initializes the CDE and the LFH. |
| 143 | */ |
| 144 | status_t ZipEntry::initFromExternal(const ZipFile* pZipFile, |
| 145 | const ZipEntry* pEntry) |
| 146 | { |
| 147 | /* |
| 148 | * Copy everything in the CDE over, then fix up the hairy bits. |
| 149 | */ |
| 150 | memcpy(&mCDE, &pEntry->mCDE, sizeof(mCDE)); |
| 151 | |
| 152 | if (mCDE.mFileNameLength > 0) { |
| 153 | mCDE.mFileName = new unsigned char[mCDE.mFileNameLength+1]; |
| 154 | if (mCDE.mFileName == NULL) |
| 155 | return NO_MEMORY; |
| 156 | strcpy((char*) mCDE.mFileName, (char*)pEntry->mCDE.mFileName); |
| 157 | } |
| 158 | if (mCDE.mFileCommentLength > 0) { |
| 159 | mCDE.mFileComment = new unsigned char[mCDE.mFileCommentLength+1]; |
| 160 | if (mCDE.mFileComment == NULL) |
| 161 | return NO_MEMORY; |
| 162 | strcpy((char*) mCDE.mFileComment, (char*)pEntry->mCDE.mFileComment); |
| 163 | } |
| 164 | if (mCDE.mExtraFieldLength > 0) { |
| 165 | /* we null-terminate this, though it may not be a string */ |
| 166 | mCDE.mExtraField = new unsigned char[mCDE.mExtraFieldLength+1]; |
| 167 | if (mCDE.mExtraField == NULL) |
| 168 | return NO_MEMORY; |
| 169 | memcpy(mCDE.mExtraField, pEntry->mCDE.mExtraField, |
| 170 | mCDE.mExtraFieldLength+1); |
| 171 | } |
| 172 | |
| 173 | /* construct the LFH from the CDE */ |
| 174 | copyCDEtoLFH(); |
| 175 | |
| 176 | /* |
| 177 | * The LFH "extra" field is independent of the CDE "extra", so we |
| 178 | * handle it here. |
| 179 | */ |
| 180 | assert(mLFH.mExtraField == NULL); |
| 181 | mLFH.mExtraFieldLength = pEntry->mLFH.mExtraFieldLength; |
| 182 | if (mLFH.mExtraFieldLength > 0) { |
| 183 | mLFH.mExtraField = new unsigned char[mLFH.mExtraFieldLength+1]; |
| 184 | if (mLFH.mExtraField == NULL) |
| 185 | return NO_MEMORY; |
| 186 | memcpy(mLFH.mExtraField, pEntry->mLFH.mExtraField, |
| 187 | mLFH.mExtraFieldLength+1); |
| 188 | } |
| 189 | |
| 190 | return NO_ERROR; |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * Insert pad bytes in the LFH by tweaking the "extra" field. This will |
| 195 | * potentially confuse something that put "extra" data in here earlier, |
| 196 | * but I can't find an actual problem. |
| 197 | */ |
| 198 | status_t ZipEntry::addPadding(int padding) |
| 199 | { |
| 200 | if (padding <= 0) |
| 201 | return INVALID_OPERATION; |
| 202 | |
| 203 | //LOGI("HEY: adding %d pad bytes to existing %d in %s\n", |
| 204 | // padding, mLFH.mExtraFieldLength, mCDE.mFileName); |
| 205 | |
| 206 | if (mLFH.mExtraFieldLength > 0) { |
| 207 | /* extend existing field */ |
| 208 | unsigned char* newExtra; |
| 209 | |
| 210 | newExtra = new unsigned char[mLFH.mExtraFieldLength + padding]; |
| 211 | if (newExtra == NULL) |
| 212 | return NO_MEMORY; |
| 213 | memset(newExtra + mLFH.mExtraFieldLength, 0, padding); |
| 214 | memcpy(newExtra, mLFH.mExtraField, mLFH.mExtraFieldLength); |
| 215 | |
| 216 | delete[] mLFH.mExtraField; |
| 217 | mLFH.mExtraField = newExtra; |
| 218 | mLFH.mExtraFieldLength += padding; |
| 219 | } else { |
| 220 | /* create new field */ |
| 221 | mLFH.mExtraField = new unsigned char[padding]; |
| 222 | memset(mLFH.mExtraField, 0, padding); |
| 223 | mLFH.mExtraFieldLength = padding; |
| 224 | } |
| 225 | |
| 226 | return NO_ERROR; |
| 227 | } |
| 228 | |
| 229 | /* |
| 230 | * Set the fields in the LFH equal to the corresponding fields in the CDE. |
| 231 | * |
| 232 | * This does not touch the LFH "extra" field. |
| 233 | */ |
| 234 | void ZipEntry::copyCDEtoLFH(void) |
| 235 | { |
| 236 | mLFH.mVersionToExtract = mCDE.mVersionToExtract; |
| 237 | mLFH.mGPBitFlag = mCDE.mGPBitFlag; |
| 238 | mLFH.mCompressionMethod = mCDE.mCompressionMethod; |
| 239 | mLFH.mLastModFileTime = mCDE.mLastModFileTime; |
| 240 | mLFH.mLastModFileDate = mCDE.mLastModFileDate; |
| 241 | mLFH.mCRC32 = mCDE.mCRC32; |
| 242 | mLFH.mCompressedSize = mCDE.mCompressedSize; |
| 243 | mLFH.mUncompressedSize = mCDE.mUncompressedSize; |
| 244 | mLFH.mFileNameLength = mCDE.mFileNameLength; |
| 245 | // the "extra field" is independent |
| 246 | |
| 247 | delete[] mLFH.mFileName; |
| 248 | if (mLFH.mFileNameLength > 0) { |
| 249 | mLFH.mFileName = new unsigned char[mLFH.mFileNameLength+1]; |
| 250 | strcpy((char*) mLFH.mFileName, (const char*) mCDE.mFileName); |
| 251 | } else { |
| 252 | mLFH.mFileName = NULL; |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | /* |
| 257 | * Set some information about a file after we add it. |
| 258 | */ |
| 259 | void ZipEntry::setDataInfo(long uncompLen, long compLen, unsigned long crc32, |
| 260 | int compressionMethod) |
| 261 | { |
| 262 | mCDE.mCompressionMethod = compressionMethod; |
| 263 | mCDE.mCRC32 = crc32; |
| 264 | mCDE.mCompressedSize = compLen; |
| 265 | mCDE.mUncompressedSize = uncompLen; |
| 266 | mCDE.mCompressionMethod = compressionMethod; |
| 267 | if (compressionMethod == kCompressDeflated) { |
| 268 | mCDE.mGPBitFlag |= 0x0002; // indicates maximum compression used |
| 269 | } |
| 270 | copyCDEtoLFH(); |
| 271 | } |
| 272 | |
| 273 | /* |
| 274 | * See if the data in mCDE and mLFH match up. This is mostly useful for |
| 275 | * debugging these classes, but it can be used to identify damaged |
| 276 | * archives. |
| 277 | * |
| 278 | * Returns "false" if they differ. |
| 279 | */ |
| 280 | bool ZipEntry::compareHeaders(void) const |
| 281 | { |
| 282 | if (mCDE.mVersionToExtract != mLFH.mVersionToExtract) { |
| 283 | LOGV("cmp: VersionToExtract\n"); |
| 284 | return false; |
| 285 | } |
| 286 | if (mCDE.mGPBitFlag != mLFH.mGPBitFlag) { |
| 287 | LOGV("cmp: GPBitFlag\n"); |
| 288 | return false; |
| 289 | } |
| 290 | if (mCDE.mCompressionMethod != mLFH.mCompressionMethod) { |
| 291 | LOGV("cmp: CompressionMethod\n"); |
| 292 | return false; |
| 293 | } |
| 294 | if (mCDE.mLastModFileTime != mLFH.mLastModFileTime) { |
| 295 | LOGV("cmp: LastModFileTime\n"); |
| 296 | return false; |
| 297 | } |
| 298 | if (mCDE.mLastModFileDate != mLFH.mLastModFileDate) { |
| 299 | LOGV("cmp: LastModFileDate\n"); |
| 300 | return false; |
| 301 | } |
| 302 | if (mCDE.mCRC32 != mLFH.mCRC32) { |
| 303 | LOGV("cmp: CRC32\n"); |
| 304 | return false; |
| 305 | } |
| 306 | if (mCDE.mCompressedSize != mLFH.mCompressedSize) { |
| 307 | LOGV("cmp: CompressedSize\n"); |
| 308 | return false; |
| 309 | } |
| 310 | if (mCDE.mUncompressedSize != mLFH.mUncompressedSize) { |
| 311 | LOGV("cmp: UncompressedSize\n"); |
| 312 | return false; |
| 313 | } |
| 314 | if (mCDE.mFileNameLength != mLFH.mFileNameLength) { |
| 315 | LOGV("cmp: FileNameLength\n"); |
| 316 | return false; |
| 317 | } |
| 318 | #if 0 // this seems to be used for padding, not real data |
| 319 | if (mCDE.mExtraFieldLength != mLFH.mExtraFieldLength) { |
| 320 | LOGV("cmp: ExtraFieldLength\n"); |
| 321 | return false; |
| 322 | } |
| 323 | #endif |
| 324 | if (mCDE.mFileName != NULL) { |
| 325 | if (strcmp((char*) mCDE.mFileName, (char*) mLFH.mFileName) != 0) { |
| 326 | LOGV("cmp: FileName\n"); |
| 327 | return false; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | return true; |
| 332 | } |
| 333 | |
| 334 | |
| 335 | /* |
| 336 | * Convert the DOS date/time stamp into a UNIX time stamp. |
| 337 | */ |
| 338 | time_t ZipEntry::getModWhen(void) const |
| 339 | { |
| 340 | struct tm parts; |
| 341 | |
| 342 | parts.tm_sec = (mCDE.mLastModFileTime & 0x001f) << 1; |
| 343 | parts.tm_min = (mCDE.mLastModFileTime & 0x07e0) >> 5; |
| 344 | parts.tm_hour = (mCDE.mLastModFileTime & 0xf800) >> 11; |
| 345 | parts.tm_mday = (mCDE.mLastModFileDate & 0x001f); |
| 346 | parts.tm_mon = ((mCDE.mLastModFileDate & 0x01e0) >> 5) -1; |
| 347 | parts.tm_year = ((mCDE.mLastModFileDate & 0xfe00) >> 9) + 80; |
| 348 | parts.tm_wday = parts.tm_yday = 0; |
| 349 | parts.tm_isdst = -1; // DST info "not available" |
| 350 | |
| 351 | return mktime(&parts); |
| 352 | } |
| 353 | |
| 354 | /* |
| 355 | * Set the CDE/LFH timestamp from UNIX time. |
| 356 | */ |
| 357 | void ZipEntry::setModWhen(time_t when) |
| 358 | { |
| 359 | #ifdef HAVE_LOCALTIME_R |
| 360 | struct tm tmResult; |
| 361 | #endif |
| 362 | time_t even; |
| 363 | unsigned short zdate, ztime; |
| 364 | |
| 365 | struct tm* ptm; |
| 366 | |
| 367 | /* round up to an even number of seconds */ |
| 368 | even = (time_t)(((unsigned long)(when) + 1) & (~1)); |
| 369 | |
| 370 | /* expand */ |
| 371 | #ifdef HAVE_LOCALTIME_R |
| 372 | ptm = localtime_r(&even, &tmResult); |
| 373 | #else |
| 374 | ptm = localtime(&even); |
| 375 | #endif |
| 376 | |
| 377 | int year; |
| 378 | year = ptm->tm_year; |
| 379 | if (year < 80) |
| 380 | year = 80; |
| 381 | |
| 382 | zdate = (year - 80) << 9 | (ptm->tm_mon+1) << 5 | ptm->tm_mday; |
| 383 | ztime = ptm->tm_hour << 11 | ptm->tm_min << 5 | ptm->tm_sec >> 1; |
| 384 | |
| 385 | mCDE.mLastModFileTime = mLFH.mLastModFileTime = ztime; |
| 386 | mCDE.mLastModFileDate = mLFH.mLastModFileDate = zdate; |
| 387 | } |
| 388 | |
| 389 | |
| 390 | /* |
| 391 | * =========================================================================== |
| 392 | * ZipEntry::LocalFileHeader |
| 393 | * =========================================================================== |
| 394 | */ |
| 395 | |
| 396 | /* |
| 397 | * Read a local file header. |
| 398 | * |
| 399 | * On entry, "fp" points to the signature at the start of the header. |
| 400 | * On exit, "fp" points to the start of data. |
| 401 | */ |
| 402 | status_t ZipEntry::LocalFileHeader::read(FILE* fp) |
| 403 | { |
| 404 | status_t result = NO_ERROR; |
| 405 | unsigned char buf[kLFHLen]; |
| 406 | |
| 407 | assert(mFileName == NULL); |
| 408 | assert(mExtraField == NULL); |
| 409 | |
| 410 | if (fread(buf, 1, kLFHLen, fp) != kLFHLen) { |
| 411 | result = UNKNOWN_ERROR; |
| 412 | goto bail; |
| 413 | } |
| 414 | |
| 415 | if (ZipEntry::getLongLE(&buf[0x00]) != kSignature) { |
| 416 | LOGD("whoops: didn't find expected signature\n"); |
| 417 | result = UNKNOWN_ERROR; |
| 418 | goto bail; |
| 419 | } |
| 420 | |
| 421 | mVersionToExtract = ZipEntry::getShortLE(&buf[0x04]); |
| 422 | mGPBitFlag = ZipEntry::getShortLE(&buf[0x06]); |
| 423 | mCompressionMethod = ZipEntry::getShortLE(&buf[0x08]); |
| 424 | mLastModFileTime = ZipEntry::getShortLE(&buf[0x0a]); |
| 425 | mLastModFileDate = ZipEntry::getShortLE(&buf[0x0c]); |
| 426 | mCRC32 = ZipEntry::getLongLE(&buf[0x0e]); |
| 427 | mCompressedSize = ZipEntry::getLongLE(&buf[0x12]); |
| 428 | mUncompressedSize = ZipEntry::getLongLE(&buf[0x16]); |
| 429 | mFileNameLength = ZipEntry::getShortLE(&buf[0x1a]); |
| 430 | mExtraFieldLength = ZipEntry::getShortLE(&buf[0x1c]); |
| 431 | |
| 432 | // TODO: validate sizes |
| 433 | |
| 434 | /* grab filename */ |
| 435 | if (mFileNameLength != 0) { |
| 436 | mFileName = new unsigned char[mFileNameLength+1]; |
| 437 | if (mFileName == NULL) { |
| 438 | result = NO_MEMORY; |
| 439 | goto bail; |
| 440 | } |
| 441 | if (fread(mFileName, 1, mFileNameLength, fp) != mFileNameLength) { |
| 442 | result = UNKNOWN_ERROR; |
| 443 | goto bail; |
| 444 | } |
| 445 | mFileName[mFileNameLength] = '\0'; |
| 446 | } |
| 447 | |
| 448 | /* grab extra field */ |
| 449 | if (mExtraFieldLength != 0) { |
| 450 | mExtraField = new unsigned char[mExtraFieldLength+1]; |
| 451 | if (mExtraField == NULL) { |
| 452 | result = NO_MEMORY; |
| 453 | goto bail; |
| 454 | } |
| 455 | if (fread(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength) { |
| 456 | result = UNKNOWN_ERROR; |
| 457 | goto bail; |
| 458 | } |
| 459 | mExtraField[mExtraFieldLength] = '\0'; |
| 460 | } |
| 461 | |
| 462 | bail: |
| 463 | return result; |
| 464 | } |
| 465 | |
| 466 | /* |
| 467 | * Write a local file header. |
| 468 | */ |
| 469 | status_t ZipEntry::LocalFileHeader::write(FILE* fp) |
| 470 | { |
| 471 | unsigned char buf[kLFHLen]; |
| 472 | |
| 473 | ZipEntry::putLongLE(&buf[0x00], kSignature); |
| 474 | ZipEntry::putShortLE(&buf[0x04], mVersionToExtract); |
| 475 | ZipEntry::putShortLE(&buf[0x06], mGPBitFlag); |
| 476 | ZipEntry::putShortLE(&buf[0x08], mCompressionMethod); |
| 477 | ZipEntry::putShortLE(&buf[0x0a], mLastModFileTime); |
| 478 | ZipEntry::putShortLE(&buf[0x0c], mLastModFileDate); |
| 479 | ZipEntry::putLongLE(&buf[0x0e], mCRC32); |
| 480 | ZipEntry::putLongLE(&buf[0x12], mCompressedSize); |
| 481 | ZipEntry::putLongLE(&buf[0x16], mUncompressedSize); |
| 482 | ZipEntry::putShortLE(&buf[0x1a], mFileNameLength); |
| 483 | ZipEntry::putShortLE(&buf[0x1c], mExtraFieldLength); |
| 484 | |
| 485 | if (fwrite(buf, 1, kLFHLen, fp) != kLFHLen) |
| 486 | return UNKNOWN_ERROR; |
| 487 | |
| 488 | /* write filename */ |
| 489 | if (mFileNameLength != 0) { |
| 490 | if (fwrite(mFileName, 1, mFileNameLength, fp) != mFileNameLength) |
| 491 | return UNKNOWN_ERROR; |
| 492 | } |
| 493 | |
| 494 | /* write "extra field" */ |
| 495 | if (mExtraFieldLength != 0) { |
| 496 | if (fwrite(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength) |
| 497 | return UNKNOWN_ERROR; |
| 498 | } |
| 499 | |
| 500 | return NO_ERROR; |
| 501 | } |
| 502 | |
| 503 | |
| 504 | /* |
| 505 | * Dump the contents of a LocalFileHeader object. |
| 506 | */ |
| 507 | void ZipEntry::LocalFileHeader::dump(void) const |
| 508 | { |
| 509 | LOGD(" LocalFileHeader contents:\n"); |
| 510 | LOGD(" versToExt=%u gpBits=0x%04x compression=%u\n", |
| 511 | mVersionToExtract, mGPBitFlag, mCompressionMethod); |
| 512 | LOGD(" modTime=0x%04x modDate=0x%04x crc32=0x%08lx\n", |
| 513 | mLastModFileTime, mLastModFileDate, mCRC32); |
| 514 | LOGD(" compressedSize=%lu uncompressedSize=%lu\n", |
| 515 | mCompressedSize, mUncompressedSize); |
| 516 | LOGD(" filenameLen=%u extraLen=%u\n", |
| 517 | mFileNameLength, mExtraFieldLength); |
| 518 | if (mFileName != NULL) |
| 519 | LOGD(" filename: '%s'\n", mFileName); |
| 520 | } |
| 521 | |
| 522 | |
| 523 | /* |
| 524 | * =========================================================================== |
| 525 | * ZipEntry::CentralDirEntry |
| 526 | * =========================================================================== |
| 527 | */ |
| 528 | |
| 529 | /* |
| 530 | * Read the central dir entry that appears next in the file. |
| 531 | * |
| 532 | * On entry, "fp" should be positioned on the signature bytes for the |
| 533 | * entry. On exit, "fp" will point at the signature word for the next |
| 534 | * entry or for the EOCD. |
| 535 | */ |
| 536 | status_t ZipEntry::CentralDirEntry::read(FILE* fp) |
| 537 | { |
| 538 | status_t result = NO_ERROR; |
| 539 | unsigned char buf[kCDELen]; |
| 540 | |
| 541 | /* no re-use */ |
| 542 | assert(mFileName == NULL); |
| 543 | assert(mExtraField == NULL); |
| 544 | assert(mFileComment == NULL); |
| 545 | |
| 546 | if (fread(buf, 1, kCDELen, fp) != kCDELen) { |
| 547 | result = UNKNOWN_ERROR; |
| 548 | goto bail; |
| 549 | } |
| 550 | |
| 551 | if (ZipEntry::getLongLE(&buf[0x00]) != kSignature) { |
| 552 | LOGD("Whoops: didn't find expected signature\n"); |
| 553 | result = UNKNOWN_ERROR; |
| 554 | goto bail; |
| 555 | } |
| 556 | |
| 557 | mVersionMadeBy = ZipEntry::getShortLE(&buf[0x04]); |
| 558 | mVersionToExtract = ZipEntry::getShortLE(&buf[0x06]); |
| 559 | mGPBitFlag = ZipEntry::getShortLE(&buf[0x08]); |
| 560 | mCompressionMethod = ZipEntry::getShortLE(&buf[0x0a]); |
| 561 | mLastModFileTime = ZipEntry::getShortLE(&buf[0x0c]); |
| 562 | mLastModFileDate = ZipEntry::getShortLE(&buf[0x0e]); |
| 563 | mCRC32 = ZipEntry::getLongLE(&buf[0x10]); |
| 564 | mCompressedSize = ZipEntry::getLongLE(&buf[0x14]); |
| 565 | mUncompressedSize = ZipEntry::getLongLE(&buf[0x18]); |
| 566 | mFileNameLength = ZipEntry::getShortLE(&buf[0x1c]); |
| 567 | mExtraFieldLength = ZipEntry::getShortLE(&buf[0x1e]); |
| 568 | mFileCommentLength = ZipEntry::getShortLE(&buf[0x20]); |
| 569 | mDiskNumberStart = ZipEntry::getShortLE(&buf[0x22]); |
| 570 | mInternalAttrs = ZipEntry::getShortLE(&buf[0x24]); |
| 571 | mExternalAttrs = ZipEntry::getLongLE(&buf[0x26]); |
| 572 | mLocalHeaderRelOffset = ZipEntry::getLongLE(&buf[0x2a]); |
| 573 | |
| 574 | // TODO: validate sizes and offsets |
| 575 | |
| 576 | /* grab filename */ |
| 577 | if (mFileNameLength != 0) { |
| 578 | mFileName = new unsigned char[mFileNameLength+1]; |
| 579 | if (mFileName == NULL) { |
| 580 | result = NO_MEMORY; |
| 581 | goto bail; |
| 582 | } |
| 583 | if (fread(mFileName, 1, mFileNameLength, fp) != mFileNameLength) { |
| 584 | result = UNKNOWN_ERROR; |
| 585 | goto bail; |
| 586 | } |
| 587 | mFileName[mFileNameLength] = '\0'; |
| 588 | } |
| 589 | |
| 590 | /* read "extra field" */ |
| 591 | if (mExtraFieldLength != 0) { |
| 592 | mExtraField = new unsigned char[mExtraFieldLength+1]; |
| 593 | if (mExtraField == NULL) { |
| 594 | result = NO_MEMORY; |
| 595 | goto bail; |
| 596 | } |
| 597 | if (fread(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength) { |
| 598 | result = UNKNOWN_ERROR; |
| 599 | goto bail; |
| 600 | } |
| 601 | mExtraField[mExtraFieldLength] = '\0'; |
| 602 | } |
| 603 | |
| 604 | |
| 605 | /* grab comment, if any */ |
| 606 | if (mFileCommentLength != 0) { |
| 607 | mFileComment = new unsigned char[mFileCommentLength+1]; |
| 608 | if (mFileComment == NULL) { |
| 609 | result = NO_MEMORY; |
| 610 | goto bail; |
| 611 | } |
| 612 | if (fread(mFileComment, 1, mFileCommentLength, fp) != mFileCommentLength) |
| 613 | { |
| 614 | result = UNKNOWN_ERROR; |
| 615 | goto bail; |
| 616 | } |
| 617 | mFileComment[mFileCommentLength] = '\0'; |
| 618 | } |
| 619 | |
| 620 | bail: |
| 621 | return result; |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * Write a central dir entry. |
| 626 | */ |
| 627 | status_t ZipEntry::CentralDirEntry::write(FILE* fp) |
| 628 | { |
| 629 | unsigned char buf[kCDELen]; |
| 630 | |
| 631 | ZipEntry::putLongLE(&buf[0x00], kSignature); |
| 632 | ZipEntry::putShortLE(&buf[0x04], mVersionMadeBy); |
| 633 | ZipEntry::putShortLE(&buf[0x06], mVersionToExtract); |
| 634 | ZipEntry::putShortLE(&buf[0x08], mGPBitFlag); |
| 635 | ZipEntry::putShortLE(&buf[0x0a], mCompressionMethod); |
| 636 | ZipEntry::putShortLE(&buf[0x0c], mLastModFileTime); |
| 637 | ZipEntry::putShortLE(&buf[0x0e], mLastModFileDate); |
| 638 | ZipEntry::putLongLE(&buf[0x10], mCRC32); |
| 639 | ZipEntry::putLongLE(&buf[0x14], mCompressedSize); |
| 640 | ZipEntry::putLongLE(&buf[0x18], mUncompressedSize); |
| 641 | ZipEntry::putShortLE(&buf[0x1c], mFileNameLength); |
| 642 | ZipEntry::putShortLE(&buf[0x1e], mExtraFieldLength); |
| 643 | ZipEntry::putShortLE(&buf[0x20], mFileCommentLength); |
| 644 | ZipEntry::putShortLE(&buf[0x22], mDiskNumberStart); |
| 645 | ZipEntry::putShortLE(&buf[0x24], mInternalAttrs); |
| 646 | ZipEntry::putLongLE(&buf[0x26], mExternalAttrs); |
| 647 | ZipEntry::putLongLE(&buf[0x2a], mLocalHeaderRelOffset); |
| 648 | |
| 649 | if (fwrite(buf, 1, kCDELen, fp) != kCDELen) |
| 650 | return UNKNOWN_ERROR; |
| 651 | |
| 652 | /* write filename */ |
| 653 | if (mFileNameLength != 0) { |
| 654 | if (fwrite(mFileName, 1, mFileNameLength, fp) != mFileNameLength) |
| 655 | return UNKNOWN_ERROR; |
| 656 | } |
| 657 | |
| 658 | /* write "extra field" */ |
| 659 | if (mExtraFieldLength != 0) { |
| 660 | if (fwrite(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength) |
| 661 | return UNKNOWN_ERROR; |
| 662 | } |
| 663 | |
| 664 | /* write comment */ |
| 665 | if (mFileCommentLength != 0) { |
| 666 | if (fwrite(mFileComment, 1, mFileCommentLength, fp) != mFileCommentLength) |
| 667 | return UNKNOWN_ERROR; |
| 668 | } |
| 669 | |
| 670 | return NO_ERROR; |
| 671 | } |
| 672 | |
| 673 | /* |
| 674 | * Dump the contents of a CentralDirEntry object. |
| 675 | */ |
| 676 | void ZipEntry::CentralDirEntry::dump(void) const |
| 677 | { |
| 678 | LOGD(" CentralDirEntry contents:\n"); |
| 679 | LOGD(" versMadeBy=%u versToExt=%u gpBits=0x%04x compression=%u\n", |
| 680 | mVersionMadeBy, mVersionToExtract, mGPBitFlag, mCompressionMethod); |
| 681 | LOGD(" modTime=0x%04x modDate=0x%04x crc32=0x%08lx\n", |
| 682 | mLastModFileTime, mLastModFileDate, mCRC32); |
| 683 | LOGD(" compressedSize=%lu uncompressedSize=%lu\n", |
| 684 | mCompressedSize, mUncompressedSize); |
| 685 | LOGD(" filenameLen=%u extraLen=%u commentLen=%u\n", |
| 686 | mFileNameLength, mExtraFieldLength, mFileCommentLength); |
| 687 | LOGD(" diskNumStart=%u intAttr=0x%04x extAttr=0x%08lx relOffset=%lu\n", |
| 688 | mDiskNumberStart, mInternalAttrs, mExternalAttrs, |
| 689 | mLocalHeaderRelOffset); |
| 690 | |
| 691 | if (mFileName != NULL) |
| 692 | LOGD(" filename: '%s'\n", mFileName); |
| 693 | if (mFileComment != NULL) |
| 694 | LOGD(" comment: '%s'\n", mFileComment); |
| 695 | } |
| 696 | |