1 /*- 2 * Copyright (c) 2008 Anselm Strauss 3 * Copyright (c) 2009 Joerg Sonnenberger 4 * Copyright (c) 2011-2012,2014 Michihiro NAKAJIMA 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * Development supported by Google Summer of Code 2008. 30 */ 31 32 #include "archive_platform.h" 33 __FBSDID("$FreeBSD$"); 34 35 #ifdef HAVE_ERRNO_H 36 #include <errno.h> 37 #endif 38 #ifdef HAVE_LANGINFO_H 39 #include <langinfo.h> 40 #endif 41 #ifdef HAVE_STDLIB_H 42 #include <stdlib.h> 43 #endif 44 #ifdef HAVE_STRING_H 45 #include <string.h> 46 #endif 47 #ifdef HAVE_ZLIB_H 48 #include <zlib.h> 49 #endif 50 51 #include "archive.h" 52 #include "archive_cryptor_private.h" 53 #include "archive_endian.h" 54 #include "archive_entry.h" 55 #include "archive_entry_locale.h" 56 #include "archive_hmac_private.h" 57 #include "archive_private.h" 58 #include "archive_random_private.h" 59 #include "archive_write_private.h" 60 61 #ifndef HAVE_ZLIB_H 62 #include "archive_crc32.h" 63 #endif 64 65 #define ZIP_ENTRY_FLAG_ENCRYPTED (1<<0) 66 #define ZIP_ENTRY_FLAG_LENGTH_AT_END (1<<3) 67 #define ZIP_ENTRY_FLAG_UTF8_NAME (1 << 11) 68 69 #define ZIP_4GB_MAX ARCHIVE_LITERAL_LL(0xffffffff) 70 #define ZIP_4GB_MAX_UNCOMPRESSED ARCHIVE_LITERAL_LL(0xff000000) 71 72 enum compression { 73 COMPRESSION_UNSPECIFIED = -1, 74 COMPRESSION_STORE = 0, 75 COMPRESSION_DEFLATE = 8 76 }; 77 78 #ifdef HAVE_ZLIB_H 79 #define COMPRESSION_DEFAULT COMPRESSION_DEFLATE 80 #else 81 #define COMPRESSION_DEFAULT COMPRESSION_STORE 82 #endif 83 84 enum encryption { 85 ENCRYPTION_NONE = 0, 86 ENCRYPTION_TRADITIONAL, /* Traditional PKWARE encryption. */ 87 ENCRYPTION_WINZIP_AES128, /* WinZIP AES-128 encryption. */ 88 ENCRYPTION_WINZIP_AES256, /* WinZIP AES-256 encryption. */ 89 }; 90 91 #define TRAD_HEADER_SIZE 12 92 /* 93 * See "WinZip - AES Encryption Information" 94 * http://www.winzip.com/aes_info.htm 95 */ 96 /* Value used in compression method. */ 97 #define WINZIP_AES_ENCRYPTION 99 98 /* A WinZip AES header size which is stored at the beginning of 99 * file contents. */ 100 #define WINZIP_AES128_HEADER_SIZE (8 + 2) 101 #define WINZIP_AES256_HEADER_SIZE (16 + 2) 102 /* AES vendor version. */ 103 #define AES_VENDOR_AE_1 0x0001 104 #define AES_VENDOR_AE_2 0x0002 105 /* Authentication code size. */ 106 #define AUTH_CODE_SIZE 10 107 /**/ 108 #define MAX_DERIVED_KEY_BUF_SIZE (AES_MAX_KEY_SIZE * 2 + 2) 109 110 struct cd_segment { 111 struct cd_segment *next; 112 size_t buff_size; 113 unsigned char *buff; 114 unsigned char *p; 115 }; 116 117 struct trad_enc_ctx { 118 uint32_t keys[3]; 119 }; 120 121 struct zip { 122 123 int64_t entry_offset; 124 int64_t entry_compressed_size; 125 int64_t entry_uncompressed_size; 126 int64_t entry_compressed_written; 127 int64_t entry_uncompressed_written; 128 int64_t entry_uncompressed_limit; 129 struct archive_entry *entry; 130 uint32_t entry_crc32; 131 enum compression entry_compression; 132 enum encryption entry_encryption; 133 int entry_flags; 134 int entry_uses_zip64; 135 int experiments; 136 struct trad_enc_ctx tctx; 137 char tctx_valid; 138 unsigned char trad_chkdat; 139 unsigned aes_vendor; 140 archive_crypto_ctx cctx; 141 char cctx_valid; 142 archive_hmac_sha1_ctx hctx; 143 char hctx_valid; 144 145 unsigned char *file_header; 146 size_t file_header_extra_offset; 147 unsigned long (*crc32func)(unsigned long crc, const void *buff, size_t len); 148 149 struct cd_segment *central_directory; 150 struct cd_segment *central_directory_last; 151 size_t central_directory_bytes; 152 size_t central_directory_entries; 153 154 int64_t written_bytes; /* Overall position in file. */ 155 156 struct archive_string_conv *opt_sconv; 157 struct archive_string_conv *sconv_default; 158 enum compression requested_compression; 159 int deflate_compression_level; 160 int init_default_conversion; 161 enum encryption encryption_type; 162 163 #define ZIP_FLAG_AVOID_ZIP64 1 164 #define ZIP_FLAG_FORCE_ZIP64 2 165 #define ZIP_FLAG_EXPERIMENT_xl 4 166 int flags; 167 168 #ifdef HAVE_ZLIB_H 169 z_stream stream; 170 #endif 171 size_t len_buf; 172 unsigned char *buf; 173 }; 174 175 /* Don't call this min or MIN, since those are already defined 176 on lots of platforms (but not all). */ 177 #define zipmin(a, b) ((a) > (b) ? (b) : (a)) 178 179 static ssize_t archive_write_zip_data(struct archive_write *, 180 const void *buff, size_t s); 181 static int archive_write_zip_close(struct archive_write *); 182 static int archive_write_zip_free(struct archive_write *); 183 static int archive_write_zip_finish_entry(struct archive_write *); 184 static int archive_write_zip_header(struct archive_write *, 185 struct archive_entry *); 186 static int archive_write_zip_options(struct archive_write *, 187 const char *, const char *); 188 static unsigned int dos_time(const time_t); 189 static size_t path_length(struct archive_entry *); 190 static int write_path(struct archive_entry *, struct archive_write *); 191 static void copy_path(struct archive_entry *, unsigned char *); 192 static struct archive_string_conv *get_sconv(struct archive_write *, struct zip *); 193 static int trad_enc_init(struct trad_enc_ctx *, const char *, size_t); 194 static unsigned trad_enc_encrypt_update(struct trad_enc_ctx *, const uint8_t *, 195 size_t, uint8_t *, size_t); 196 static int init_traditional_pkware_encryption(struct archive_write *); 197 static int is_traditional_pkware_encryption_supported(void); 198 static int init_winzip_aes_encryption(struct archive_write *); 199 static int is_winzip_aes_encryption_supported(int encryption); 200 201 static unsigned char * 202 cd_alloc(struct zip *zip, size_t length) 203 { 204 unsigned char *p; 205 206 if (zip->central_directory == NULL 207 || (zip->central_directory_last->p + length 208 > zip->central_directory_last->buff + zip->central_directory_last->buff_size)) { 209 struct cd_segment *segment = calloc(1, sizeof(*segment)); 210 if (segment == NULL) 211 return NULL; 212 segment->buff_size = 64 * 1024; 213 segment->buff = malloc(segment->buff_size); 214 if (segment->buff == NULL) { 215 free(segment); 216 return NULL; 217 } 218 segment->p = segment->buff; 219 220 if (zip->central_directory == NULL) { 221 zip->central_directory 222 = zip->central_directory_last 223 = segment; 224 } else { 225 zip->central_directory_last->next = segment; 226 zip->central_directory_last = segment; 227 } 228 } 229 230 p = zip->central_directory_last->p; 231 zip->central_directory_last->p += length; 232 zip->central_directory_bytes += length; 233 return (p); 234 } 235 236 static unsigned long 237 real_crc32(unsigned long crc, const void *buff, size_t len) 238 { 239 return crc32(crc, buff, (unsigned int)len); 240 } 241 242 static unsigned long 243 fake_crc32(unsigned long crc, const void *buff, size_t len) 244 { 245 (void)crc; /* UNUSED */ 246 (void)buff; /* UNUSED */ 247 (void)len; /* UNUSED */ 248 return 0; 249 } 250 251 static int 252 archive_write_zip_options(struct archive_write *a, const char *key, 253 const char *val) 254 { 255 struct zip *zip = a->format_data; 256 int ret = ARCHIVE_FAILED; 257 258 if (strcmp(key, "compression") == 0) { 259 /* 260 * Set compression to use on all future entries. 261 * This only affects regular files. 262 */ 263 if (val == NULL || val[0] == 0) { 264 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 265 "%s: compression option needs a compression name", 266 a->format_name); 267 } else if (strcmp(val, "deflate") == 0) { 268 #ifdef HAVE_ZLIB_H 269 zip->requested_compression = COMPRESSION_DEFLATE; 270 ret = ARCHIVE_OK; 271 #else 272 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 273 "deflate compression not supported"); 274 #endif 275 } else if (strcmp(val, "store") == 0) { 276 zip->requested_compression = COMPRESSION_STORE; 277 ret = ARCHIVE_OK; 278 } 279 return (ret); 280 } else if (strcmp(key, "compression-level") == 0) { 281 if (val == NULL || !(val[0] >= '0' && val[0] <= '9') || val[1] != '\0') { 282 return ARCHIVE_WARN; 283 } 284 285 if (val[0] == '0') { 286 zip->requested_compression = COMPRESSION_STORE; 287 return ARCHIVE_OK; 288 } else { 289 #ifdef HAVE_ZLIB_H 290 zip->requested_compression = COMPRESSION_DEFLATE; 291 zip->deflate_compression_level = val[0] - '0'; 292 return ARCHIVE_OK; 293 #else 294 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 295 "deflate compression not supported"); 296 #endif 297 } 298 } else if (strcmp(key, "encryption") == 0) { 299 if (val == NULL) { 300 zip->encryption_type = ENCRYPTION_NONE; 301 ret = ARCHIVE_OK; 302 } else if (val[0] == '1' || strcmp(val, "traditional") == 0 303 || strcmp(val, "zipcrypt") == 0 304 || strcmp(val, "ZipCrypt") == 0) { 305 if (is_traditional_pkware_encryption_supported()) { 306 zip->encryption_type = ENCRYPTION_TRADITIONAL; 307 ret = ARCHIVE_OK; 308 } else { 309 archive_set_error(&a->archive, 310 ARCHIVE_ERRNO_MISC, 311 "encryption not supported"); 312 } 313 } else if (strcmp(val, "aes128") == 0) { 314 if (is_winzip_aes_encryption_supported( 315 ENCRYPTION_WINZIP_AES128)) { 316 zip->encryption_type = ENCRYPTION_WINZIP_AES128; 317 ret = ARCHIVE_OK; 318 } else { 319 archive_set_error(&a->archive, 320 ARCHIVE_ERRNO_MISC, 321 "encryption not supported"); 322 } 323 } else if (strcmp(val, "aes256") == 0) { 324 if (is_winzip_aes_encryption_supported( 325 ENCRYPTION_WINZIP_AES256)) { 326 zip->encryption_type = ENCRYPTION_WINZIP_AES256; 327 ret = ARCHIVE_OK; 328 } else { 329 archive_set_error(&a->archive, 330 ARCHIVE_ERRNO_MISC, 331 "encryption not supported"); 332 } 333 } else { 334 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 335 "%s: unknown encryption '%s'", 336 a->format_name, val); 337 } 338 return (ret); 339 } else if (strcmp(key, "experimental") == 0) { 340 if (val == NULL || val[0] == 0) { 341 zip->flags &= ~ ZIP_FLAG_EXPERIMENT_xl; 342 } else { 343 zip->flags |= ZIP_FLAG_EXPERIMENT_xl; 344 } 345 return (ARCHIVE_OK); 346 } else if (strcmp(key, "fakecrc32") == 0) { 347 /* 348 * FOR TESTING ONLY: disable CRC calculation to speed up 349 * certain complex tests. 350 */ 351 if (val == NULL || val[0] == 0) { 352 zip->crc32func = real_crc32; 353 } else { 354 zip->crc32func = fake_crc32; 355 } 356 return (ARCHIVE_OK); 357 } else if (strcmp(key, "hdrcharset") == 0) { 358 /* 359 * Set the character set used in translating filenames. 360 */ 361 if (val == NULL || val[0] == 0) { 362 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 363 "%s: hdrcharset option needs a character-set name", 364 a->format_name); 365 } else { 366 zip->opt_sconv = archive_string_conversion_to_charset( 367 &a->archive, val, 0); 368 if (zip->opt_sconv != NULL) 369 ret = ARCHIVE_OK; 370 else 371 ret = ARCHIVE_FATAL; 372 } 373 return (ret); 374 } else if (strcmp(key, "zip64") == 0) { 375 /* 376 * Bias decisions about Zip64: force them to be 377 * generated in certain cases where they are not 378 * forbidden or avoid them in certain cases where they 379 * are not strictly required. 380 */ 381 if (val != NULL && *val != '\0') { 382 zip->flags |= ZIP_FLAG_FORCE_ZIP64; 383 zip->flags &= ~ZIP_FLAG_AVOID_ZIP64; 384 } else { 385 zip->flags &= ~ZIP_FLAG_FORCE_ZIP64; 386 zip->flags |= ZIP_FLAG_AVOID_ZIP64; 387 } 388 return (ARCHIVE_OK); 389 } 390 391 /* Note: The "warn" return is just to inform the options 392 * supervisor that we didn't handle it. It will generate 393 * a suitable error if no one used this option. */ 394 return (ARCHIVE_WARN); 395 } 396 397 int 398 archive_write_zip_set_compression_deflate(struct archive *_a) 399 { 400 struct archive_write *a = (struct archive_write *)_a; 401 int ret = ARCHIVE_FAILED; 402 403 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 404 ARCHIVE_STATE_NEW | ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA, 405 "archive_write_zip_set_compression_deflate"); 406 if (a->archive.archive_format != ARCHIVE_FORMAT_ZIP) { 407 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 408 "Can only use archive_write_zip_set_compression_deflate" 409 " with zip format"); 410 ret = ARCHIVE_FATAL; 411 } else { 412 #ifdef HAVE_ZLIB_H 413 struct zip *zip = a->format_data; 414 zip->requested_compression = COMPRESSION_DEFLATE; 415 ret = ARCHIVE_OK; 416 #else 417 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 418 "deflate compression not supported"); 419 ret = ARCHIVE_FAILED; 420 #endif 421 } 422 return (ret); 423 } 424 425 int 426 archive_write_zip_set_compression_store(struct archive *_a) 427 { 428 struct archive_write *a = (struct archive_write *)_a; 429 struct zip *zip = a->format_data; 430 int ret = ARCHIVE_FAILED; 431 432 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 433 ARCHIVE_STATE_NEW | ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA, 434 "archive_write_zip_set_compression_deflate"); 435 if (a->archive.archive_format != ARCHIVE_FORMAT_ZIP) { 436 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 437 "Can only use archive_write_zip_set_compression_store" 438 " with zip format"); 439 ret = ARCHIVE_FATAL; 440 } else { 441 zip->requested_compression = COMPRESSION_STORE; 442 ret = ARCHIVE_OK; 443 } 444 return (ret); 445 } 446 447 int 448 archive_write_set_format_zip(struct archive *_a) 449 { 450 struct archive_write *a = (struct archive_write *)_a; 451 struct zip *zip; 452 453 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 454 ARCHIVE_STATE_NEW, "archive_write_set_format_zip"); 455 456 /* If another format was already registered, unregister it. */ 457 if (a->format_free != NULL) 458 (a->format_free)(a); 459 460 zip = (struct zip *) calloc(1, sizeof(*zip)); 461 if (zip == NULL) { 462 archive_set_error(&a->archive, ENOMEM, 463 "Can't allocate zip data"); 464 return (ARCHIVE_FATAL); 465 } 466 467 /* "Unspecified" lets us choose the appropriate compression. */ 468 zip->requested_compression = COMPRESSION_UNSPECIFIED; 469 #ifdef HAVE_ZLIB_H 470 zip->deflate_compression_level = Z_DEFAULT_COMPRESSION; 471 #endif 472 zip->crc32func = real_crc32; 473 474 /* A buffer used for both compression and encryption. */ 475 zip->len_buf = 65536; 476 zip->buf = malloc(zip->len_buf); 477 if (zip->buf == NULL) { 478 free(zip); 479 archive_set_error(&a->archive, ENOMEM, 480 "Can't allocate compression buffer"); 481 return (ARCHIVE_FATAL); 482 } 483 484 a->format_data = zip; 485 a->format_name = "zip"; 486 a->format_options = archive_write_zip_options; 487 a->format_write_header = archive_write_zip_header; 488 a->format_write_data = archive_write_zip_data; 489 a->format_finish_entry = archive_write_zip_finish_entry; 490 a->format_close = archive_write_zip_close; 491 a->format_free = archive_write_zip_free; 492 a->archive.archive_format = ARCHIVE_FORMAT_ZIP; 493 a->archive.archive_format_name = "ZIP"; 494 495 return (ARCHIVE_OK); 496 } 497 498 static int 499 is_all_ascii(const char *p) 500 { 501 const unsigned char *pp = (const unsigned char *)p; 502 503 while (*pp) { 504 if (*pp++ > 127) 505 return (0); 506 } 507 return (1); 508 } 509 510 static int 511 archive_write_zip_header(struct archive_write *a, struct archive_entry *entry) 512 { 513 unsigned char local_header[32]; 514 unsigned char local_extra[144]; 515 struct zip *zip = a->format_data; 516 unsigned char *e; 517 unsigned char *cd_extra; 518 size_t filename_length; 519 const char *slink = NULL; 520 size_t slink_size = 0; 521 struct archive_string_conv *sconv = get_sconv(a, zip); 522 int ret, ret2 = ARCHIVE_OK; 523 mode_t type; 524 int version_needed = 10; 525 526 /* Ignore types of entries that we don't support. */ 527 type = archive_entry_filetype(entry); 528 if (type != AE_IFREG && type != AE_IFDIR && type != AE_IFLNK) { 529 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 530 "Filetype not supported"); 531 return ARCHIVE_FAILED; 532 }; 533 534 /* If we're not using Zip64, reject large files. */ 535 if (zip->flags & ZIP_FLAG_AVOID_ZIP64) { 536 /* Reject entries over 4GB. */ 537 if (archive_entry_size_is_set(entry) 538 && (archive_entry_size(entry) > ZIP_4GB_MAX)) { 539 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 540 "Files > 4GB require Zip64 extensions"); 541 return ARCHIVE_FAILED; 542 } 543 /* Reject entries if archive is > 4GB. */ 544 if (zip->written_bytes > ZIP_4GB_MAX) { 545 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 546 "Archives > 4GB require Zip64 extensions"); 547 return ARCHIVE_FAILED; 548 } 549 } 550 551 /* Only regular files can have size > 0. */ 552 if (type != AE_IFREG) 553 archive_entry_set_size(entry, 0); 554 555 556 /* Reset information from last entry. */ 557 zip->entry_offset = zip->written_bytes; 558 zip->entry_uncompressed_limit = INT64_MAX; 559 zip->entry_compressed_size = 0; 560 zip->entry_uncompressed_size = 0; 561 zip->entry_compressed_written = 0; 562 zip->entry_uncompressed_written = 0; 563 zip->entry_flags = 0; 564 zip->entry_uses_zip64 = 0; 565 zip->entry_crc32 = zip->crc32func(0, NULL, 0); 566 zip->entry_encryption = 0; 567 archive_entry_free(zip->entry); 568 zip->entry = NULL; 569 570 if (zip->cctx_valid) 571 archive_encrypto_aes_ctr_release(&zip->cctx); 572 if (zip->hctx_valid) 573 archive_hmac_sha1_cleanup(&zip->hctx); 574 zip->tctx_valid = zip->cctx_valid = zip->hctx_valid = 0; 575 576 if (type == AE_IFREG 577 &&(!archive_entry_size_is_set(entry) 578 || archive_entry_size(entry) > 0)) { 579 switch (zip->encryption_type) { 580 case ENCRYPTION_TRADITIONAL: 581 case ENCRYPTION_WINZIP_AES128: 582 case ENCRYPTION_WINZIP_AES256: 583 zip->entry_flags |= ZIP_ENTRY_FLAG_ENCRYPTED; 584 zip->entry_encryption = zip->encryption_type; 585 break; 586 default: 587 break; 588 } 589 } 590 591 592 #if defined(_WIN32) && !defined(__CYGWIN__) 593 /* Make sure the path separators in pathname, hardlink and symlink 594 * are all slash '/', not the Windows path separator '\'. */ 595 zip->entry = __la_win_entry_in_posix_pathseparator(entry); 596 if (zip->entry == entry) 597 zip->entry = archive_entry_clone(entry); 598 #else 599 zip->entry = archive_entry_clone(entry); 600 #endif 601 if (zip->entry == NULL) { 602 archive_set_error(&a->archive, ENOMEM, 603 "Can't allocate zip header data"); 604 return (ARCHIVE_FATAL); 605 } 606 607 if (sconv != NULL) { 608 const char *p; 609 size_t len; 610 611 if (archive_entry_pathname_l(entry, &p, &len, sconv) != 0) { 612 if (errno == ENOMEM) { 613 archive_set_error(&a->archive, ENOMEM, 614 "Can't allocate memory for Pathname"); 615 return (ARCHIVE_FATAL); 616 } 617 archive_set_error(&a->archive, 618 ARCHIVE_ERRNO_FILE_FORMAT, 619 "Can't translate Pathname '%s' to %s", 620 archive_entry_pathname(entry), 621 archive_string_conversion_charset_name(sconv)); 622 ret2 = ARCHIVE_WARN; 623 } 624 if (len > 0) 625 archive_entry_set_pathname(zip->entry, p); 626 627 /* 628 * There is no standard for symlink handling; we convert 629 * it using the same character-set translation that we use 630 * for filename. 631 */ 632 if (type == AE_IFLNK) { 633 if (archive_entry_symlink_l(entry, &p, &len, sconv)) { 634 if (errno == ENOMEM) { 635 archive_set_error(&a->archive, ENOMEM, 636 "Can't allocate memory " 637 " for Symlink"); 638 return (ARCHIVE_FATAL); 639 } 640 /* No error if we can't convert. */ 641 } else if (len > 0) 642 archive_entry_set_symlink(zip->entry, p); 643 } 644 } 645 646 /* If filename isn't ASCII and we can use UTF-8, set the UTF-8 flag. */ 647 if (!is_all_ascii(archive_entry_pathname(zip->entry))) { 648 if (zip->opt_sconv != NULL) { 649 if (strcmp(archive_string_conversion_charset_name( 650 zip->opt_sconv), "UTF-8") == 0) 651 zip->entry_flags |= ZIP_ENTRY_FLAG_UTF8_NAME; 652 #if HAVE_NL_LANGINFO 653 } else if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0) { 654 zip->entry_flags |= ZIP_ENTRY_FLAG_UTF8_NAME; 655 #endif 656 } 657 } 658 filename_length = path_length(zip->entry); 659 660 /* Determine appropriate compression and size for this entry. */ 661 if (type == AE_IFLNK) { 662 slink = archive_entry_symlink(zip->entry); 663 if (slink != NULL) 664 slink_size = strlen(slink); 665 else 666 slink_size = 0; 667 zip->entry_uncompressed_limit = slink_size; 668 zip->entry_compressed_size = slink_size; 669 zip->entry_uncompressed_size = slink_size; 670 zip->entry_crc32 = zip->crc32func(zip->entry_crc32, 671 (const unsigned char *)slink, slink_size); 672 zip->entry_compression = COMPRESSION_STORE; 673 version_needed = 20; 674 } else if (type != AE_IFREG) { 675 zip->entry_compression = COMPRESSION_STORE; 676 zip->entry_uncompressed_limit = 0; 677 version_needed = 20; 678 } else if (archive_entry_size_is_set(zip->entry)) { 679 int64_t size = archive_entry_size(zip->entry); 680 int64_t additional_size = 0; 681 682 zip->entry_uncompressed_limit = size; 683 zip->entry_compression = zip->requested_compression; 684 if (zip->entry_compression == COMPRESSION_UNSPECIFIED) { 685 zip->entry_compression = COMPRESSION_DEFAULT; 686 } 687 if (zip->entry_compression == COMPRESSION_STORE) { 688 zip->entry_compressed_size = size; 689 zip->entry_uncompressed_size = size; 690 version_needed = 10; 691 } else { 692 zip->entry_uncompressed_size = size; 693 version_needed = 20; 694 } 695 696 if (zip->entry_flags & ZIP_ENTRY_FLAG_ENCRYPTED) { 697 switch (zip->entry_encryption) { 698 case ENCRYPTION_TRADITIONAL: 699 additional_size = TRAD_HEADER_SIZE; 700 version_needed = 20; 701 break; 702 case ENCRYPTION_WINZIP_AES128: 703 additional_size = WINZIP_AES128_HEADER_SIZE 704 + AUTH_CODE_SIZE; 705 version_needed = 20; 706 break; 707 case ENCRYPTION_WINZIP_AES256: 708 additional_size = WINZIP_AES256_HEADER_SIZE 709 + AUTH_CODE_SIZE; 710 version_needed = 20; 711 break; 712 default: 713 break; 714 } 715 if (zip->entry_compression == COMPRESSION_STORE) 716 zip->entry_compressed_size += additional_size; 717 } 718 719 /* 720 * Set Zip64 extension in any of the following cases 721 * (this was suggested by discussion on info-zip-dev 722 * mailing list): 723 * = Zip64 is being forced by user 724 * = File is over 4GiB uncompressed 725 * (including encryption header, if any) 726 * = File is close to 4GiB and is being compressed 727 * (compression might make file larger) 728 */ 729 if ((zip->flags & ZIP_FLAG_FORCE_ZIP64) 730 || (zip->entry_uncompressed_size + additional_size > ZIP_4GB_MAX) 731 || (zip->entry_uncompressed_size > ZIP_4GB_MAX_UNCOMPRESSED 732 && zip->entry_compression != COMPRESSION_STORE)) { 733 zip->entry_uses_zip64 = 1; 734 version_needed = 45; 735 } 736 737 /* We may know the size, but never the CRC. */ 738 zip->entry_flags |= ZIP_ENTRY_FLAG_LENGTH_AT_END; 739 } else { 740 /* We don't know the size. In this case, we prefer 741 * deflate (it has a clear end-of-data marker which 742 * makes length-at-end more reliable) and will 743 * enable Zip64 extensions unless we're told not to. 744 */ 745 zip->entry_compression = COMPRESSION_DEFAULT; 746 zip->entry_flags |= ZIP_ENTRY_FLAG_LENGTH_AT_END; 747 if ((zip->flags & ZIP_FLAG_AVOID_ZIP64) == 0) { 748 zip->entry_uses_zip64 = 1; 749 version_needed = 45; 750 } else if (zip->entry_compression == COMPRESSION_STORE) { 751 version_needed = 10; 752 } else { 753 version_needed = 20; 754 } 755 756 if (zip->entry_flags & ZIP_ENTRY_FLAG_ENCRYPTED) { 757 switch (zip->entry_encryption) { 758 case ENCRYPTION_TRADITIONAL: 759 case ENCRYPTION_WINZIP_AES128: 760 case ENCRYPTION_WINZIP_AES256: 761 if (version_needed < 20) 762 version_needed = 20; 763 break; 764 default: 765 break; 766 } 767 } 768 } 769 770 /* Format the local header. */ 771 memset(local_header, 0, sizeof(local_header)); 772 memcpy(local_header, "PK\003\004", 4); 773 archive_le16enc(local_header + 4, version_needed); 774 archive_le16enc(local_header + 6, zip->entry_flags); 775 if (zip->entry_encryption == ENCRYPTION_WINZIP_AES128 776 || zip->entry_encryption == ENCRYPTION_WINZIP_AES256) 777 archive_le16enc(local_header + 8, WINZIP_AES_ENCRYPTION); 778 else 779 archive_le16enc(local_header + 8, zip->entry_compression); 780 archive_le32enc(local_header + 10, 781 dos_time(archive_entry_mtime(zip->entry))); 782 archive_le32enc(local_header + 14, zip->entry_crc32); 783 if (zip->entry_uses_zip64) { 784 /* Zip64 data in the local header "must" include both 785 * compressed and uncompressed sizes AND those fields 786 * are included only if these are 0xffffffff; 787 * THEREFORE these must be set this way, even if we 788 * know one of them is smaller. */ 789 archive_le32enc(local_header + 18, ZIP_4GB_MAX); 790 archive_le32enc(local_header + 22, ZIP_4GB_MAX); 791 } else { 792 archive_le32enc(local_header + 18, (uint32_t)zip->entry_compressed_size); 793 archive_le32enc(local_header + 22, (uint32_t)zip->entry_uncompressed_size); 794 } 795 archive_le16enc(local_header + 26, (uint16_t)filename_length); 796 797 if (zip->entry_encryption == ENCRYPTION_TRADITIONAL) { 798 if (zip->entry_flags & ZIP_ENTRY_FLAG_LENGTH_AT_END) 799 zip->trad_chkdat = local_header[11]; 800 else 801 zip->trad_chkdat = local_header[17]; 802 } 803 804 /* Format as much of central directory file header as we can: */ 805 zip->file_header = cd_alloc(zip, 46); 806 /* If (zip->file_header == NULL) XXXX */ 807 ++zip->central_directory_entries; 808 memset(zip->file_header, 0, 46); 809 memcpy(zip->file_header, "PK\001\002", 4); 810 /* "Made by PKZip 2.0 on Unix." */ 811 archive_le16enc(zip->file_header + 4, 3 * 256 + version_needed); 812 archive_le16enc(zip->file_header + 6, version_needed); 813 archive_le16enc(zip->file_header + 8, zip->entry_flags); 814 if (zip->entry_encryption == ENCRYPTION_WINZIP_AES128 815 || zip->entry_encryption == ENCRYPTION_WINZIP_AES256) 816 archive_le16enc(zip->file_header + 10, WINZIP_AES_ENCRYPTION); 817 else 818 archive_le16enc(zip->file_header + 10, zip->entry_compression); 819 archive_le32enc(zip->file_header + 12, 820 dos_time(archive_entry_mtime(zip->entry))); 821 archive_le16enc(zip->file_header + 28, (uint16_t)filename_length); 822 /* Following Info-Zip, store mode in the "external attributes" field. */ 823 archive_le32enc(zip->file_header + 38, 824 ((uint32_t)archive_entry_mode(zip->entry)) << 16); 825 e = cd_alloc(zip, filename_length); 826 /* If (e == NULL) XXXX */ 827 copy_path(zip->entry, e); 828 829 /* Format extra data. */ 830 memset(local_extra, 0, sizeof(local_extra)); 831 e = local_extra; 832 833 /* First, extra blocks that are the same between 834 * the local file header and the central directory. 835 * We format them once and then duplicate them. */ 836 837 /* UT timestamp, length depends on what timestamps are set. */ 838 memcpy(e, "UT", 2); 839 archive_le16enc(e + 2, 840 1 841 + (archive_entry_mtime_is_set(entry) ? 4 : 0) 842 + (archive_entry_atime_is_set(entry) ? 4 : 0) 843 + (archive_entry_ctime_is_set(entry) ? 4 : 0)); 844 e += 4; 845 *e++ = 846 (archive_entry_mtime_is_set(entry) ? 1 : 0) 847 | (archive_entry_atime_is_set(entry) ? 2 : 0) 848 | (archive_entry_ctime_is_set(entry) ? 4 : 0); 849 if (archive_entry_mtime_is_set(entry)) { 850 archive_le32enc(e, (uint32_t)archive_entry_mtime(entry)); 851 e += 4; 852 } 853 if (archive_entry_atime_is_set(entry)) { 854 archive_le32enc(e, (uint32_t)archive_entry_atime(entry)); 855 e += 4; 856 } 857 if (archive_entry_ctime_is_set(entry)) { 858 archive_le32enc(e, (uint32_t)archive_entry_ctime(entry)); 859 e += 4; 860 } 861 862 /* ux Unix extra data, length 11, version 1 */ 863 /* TODO: If uid < 64k, use 2 bytes, ditto for gid. */ 864 memcpy(e, "ux\013\000\001", 5); 865 e += 5; 866 *e++ = 4; /* Length of following UID */ 867 archive_le32enc(e, (uint32_t)archive_entry_uid(entry)); 868 e += 4; 869 *e++ = 4; /* Length of following GID */ 870 archive_le32enc(e, (uint32_t)archive_entry_gid(entry)); 871 e += 4; 872 873 /* AES extra data field: WinZIP AES information, ID=0x9901 */ 874 if ((zip->entry_flags & ZIP_ENTRY_FLAG_ENCRYPTED) 875 && (zip->entry_encryption == ENCRYPTION_WINZIP_AES128 876 || zip->entry_encryption == ENCRYPTION_WINZIP_AES256)) { 877 878 memcpy(e, "\001\231\007\000\001\000AE", 8); 879 /* AES vendor version AE-2 does not store a CRC. 880 * WinZip 11 uses AE-1, which does store the CRC, 881 * but it does not store the CRC when the file size 882 * is less than 20 bytes. So we simulate what 883 * WinZip 11 does. 884 * NOTE: WinZip 9.0 and 10.0 uses AE-2 by default. */ 885 if (archive_entry_size_is_set(zip->entry) 886 && archive_entry_size(zip->entry) < 20) { 887 archive_le16enc(e+4, AES_VENDOR_AE_2); 888 zip->aes_vendor = AES_VENDOR_AE_2;/* no CRC. */ 889 } else 890 zip->aes_vendor = AES_VENDOR_AE_1; 891 e += 8; 892 /* AES encryption strength. */ 893 *e++ = (zip->entry_encryption == ENCRYPTION_WINZIP_AES128)?1:3; 894 /* Actual compression method. */ 895 archive_le16enc(e, zip->entry_compression); 896 e += 2; 897 } 898 899 /* Copy UT ,ux, and AES-extra into central directory as well. */ 900 zip->file_header_extra_offset = zip->central_directory_bytes; 901 cd_extra = cd_alloc(zip, e - local_extra); 902 memcpy(cd_extra, local_extra, e - local_extra); 903 904 /* 905 * Following extra blocks vary between local header and 906 * central directory. These are the local header versions. 907 * Central directory versions get formatted in 908 * archive_write_zip_finish_entry() below. 909 */ 910 911 /* "[Zip64 entry] in the local header MUST include BOTH 912 * original [uncompressed] and compressed size fields." */ 913 if (zip->entry_uses_zip64) { 914 unsigned char *zip64_start = e; 915 memcpy(e, "\001\000\020\000", 4); 916 e += 4; 917 archive_le64enc(e, zip->entry_uncompressed_size); 918 e += 8; 919 archive_le64enc(e, zip->entry_compressed_size); 920 e += 8; 921 archive_le16enc(zip64_start + 2, (uint16_t)(e - (zip64_start + 4))); 922 } 923 924 if (zip->flags & ZIP_FLAG_EXPERIMENT_xl) { 925 /* Experimental 'xl' extension to improve streaming. */ 926 unsigned char *external_info = e; 927 int included = 7; 928 memcpy(e, "xl\000\000", 4); // 0x6c65 + 2-byte length 929 e += 4; 930 e[0] = included; /* bitmap of included fields */ 931 e += 1; 932 if (included & 1) { 933 archive_le16enc(e, /* "Version created by" */ 934 3 * 256 + version_needed); 935 e += 2; 936 } 937 if (included & 2) { 938 archive_le16enc(e, 0); /* internal file attributes */ 939 e += 2; 940 } 941 if (included & 4) { 942 archive_le32enc(e, /* external file attributes */ 943 ((uint32_t)archive_entry_mode(zip->entry)) << 16); 944 e += 4; 945 } 946 if (included & 8) { 947 // Libarchive does not currently support file comments. 948 } 949 archive_le16enc(external_info + 2, (uint16_t)(e - (external_info + 4))); 950 } 951 952 /* Update local header with size of extra data and write it all out: */ 953 archive_le16enc(local_header + 28, (uint16_t)(e - local_extra)); 954 955 ret = __archive_write_output(a, local_header, 30); 956 if (ret != ARCHIVE_OK) 957 return (ARCHIVE_FATAL); 958 zip->written_bytes += 30; 959 960 ret = write_path(zip->entry, a); 961 if (ret <= ARCHIVE_OK) 962 return (ARCHIVE_FATAL); 963 zip->written_bytes += ret; 964 965 ret = __archive_write_output(a, local_extra, e - local_extra); 966 if (ret != ARCHIVE_OK) 967 return (ARCHIVE_FATAL); 968 zip->written_bytes += e - local_extra; 969 970 /* For symlinks, write the body now. */ 971 if (slink != NULL) { 972 ret = __archive_write_output(a, slink, slink_size); 973 if (ret != ARCHIVE_OK) 974 return (ARCHIVE_FATAL); 975 zip->entry_compressed_written += slink_size; 976 zip->entry_uncompressed_written += slink_size; 977 zip->written_bytes += slink_size; 978 } 979 980 #ifdef HAVE_ZLIB_H 981 if (zip->entry_compression == COMPRESSION_DEFLATE) { 982 zip->stream.zalloc = Z_NULL; 983 zip->stream.zfree = Z_NULL; 984 zip->stream.opaque = Z_NULL; 985 zip->stream.next_out = zip->buf; 986 zip->stream.avail_out = (uInt)zip->len_buf; 987 if (deflateInit2(&zip->stream, zip->deflate_compression_level, 988 Z_DEFLATED, -15, 8, Z_DEFAULT_STRATEGY) != Z_OK) { 989 archive_set_error(&a->archive, ENOMEM, 990 "Can't init deflate compressor"); 991 return (ARCHIVE_FATAL); 992 } 993 } 994 #endif 995 996 return (ret2); 997 } 998 999 static ssize_t 1000 archive_write_zip_data(struct archive_write *a, const void *buff, size_t s) 1001 { 1002 int ret; 1003 struct zip *zip = a->format_data; 1004 1005 if ((int64_t)s > zip->entry_uncompressed_limit) 1006 s = (size_t)zip->entry_uncompressed_limit; 1007 zip->entry_uncompressed_written += s; 1008 1009 if (s == 0) return 0; 1010 1011 if (zip->entry_flags & ZIP_ENTRY_FLAG_ENCRYPTED) { 1012 switch (zip->entry_encryption) { 1013 case ENCRYPTION_TRADITIONAL: 1014 /* Initialize traditional PKWARE encryption context. */ 1015 if (!zip->tctx_valid) { 1016 ret = init_traditional_pkware_encryption(a); 1017 if (ret != ARCHIVE_OK) 1018 return (ret); 1019 zip->tctx_valid = 1; 1020 } 1021 break; 1022 case ENCRYPTION_WINZIP_AES128: 1023 case ENCRYPTION_WINZIP_AES256: 1024 if (!zip->cctx_valid) { 1025 ret = init_winzip_aes_encryption(a); 1026 if (ret != ARCHIVE_OK) 1027 return (ret); 1028 zip->cctx_valid = zip->hctx_valid = 1; 1029 } 1030 break; 1031 default: 1032 break; 1033 } 1034 } 1035 1036 switch (zip->entry_compression) { 1037 case COMPRESSION_STORE: 1038 if (zip->tctx_valid || zip->cctx_valid) { 1039 const uint8_t *rb = (const uint8_t *)buff; 1040 const uint8_t * const re = rb + s; 1041 1042 while (rb < re) { 1043 size_t l; 1044 1045 if (zip->tctx_valid) { 1046 l = trad_enc_encrypt_update(&zip->tctx, 1047 rb, re - rb, 1048 zip->buf, zip->len_buf); 1049 } else { 1050 l = zip->len_buf; 1051 ret = archive_encrypto_aes_ctr_update( 1052 &zip->cctx, 1053 rb, re - rb, zip->buf, &l); 1054 if (ret < 0) { 1055 archive_set_error(&a->archive, 1056 ARCHIVE_ERRNO_MISC, 1057 "Failed to encrypt file"); 1058 return (ARCHIVE_FAILED); 1059 } 1060 archive_hmac_sha1_update(&zip->hctx, 1061 zip->buf, l); 1062 } 1063 ret = __archive_write_output(a, zip->buf, l); 1064 if (ret != ARCHIVE_OK) 1065 return (ret); 1066 zip->entry_compressed_written += l; 1067 zip->written_bytes += l; 1068 rb += l; 1069 } 1070 } else { 1071 ret = __archive_write_output(a, buff, s); 1072 if (ret != ARCHIVE_OK) 1073 return (ret); 1074 zip->written_bytes += s; 1075 zip->entry_compressed_written += s; 1076 } 1077 break; 1078 #if HAVE_ZLIB_H 1079 case COMPRESSION_DEFLATE: 1080 zip->stream.next_in = (unsigned char*)(uintptr_t)buff; 1081 zip->stream.avail_in = (uInt)s; 1082 do { 1083 ret = deflate(&zip->stream, Z_NO_FLUSH); 1084 if (ret == Z_STREAM_ERROR) 1085 return (ARCHIVE_FATAL); 1086 if (zip->stream.avail_out == 0) { 1087 if (zip->tctx_valid) { 1088 trad_enc_encrypt_update(&zip->tctx, 1089 zip->buf, zip->len_buf, 1090 zip->buf, zip->len_buf); 1091 } else if (zip->cctx_valid) { 1092 size_t outl = zip->len_buf; 1093 ret = archive_encrypto_aes_ctr_update( 1094 &zip->cctx, 1095 zip->buf, zip->len_buf, 1096 zip->buf, &outl); 1097 if (ret < 0) { 1098 archive_set_error(&a->archive, 1099 ARCHIVE_ERRNO_MISC, 1100 "Failed to encrypt file"); 1101 return (ARCHIVE_FAILED); 1102 } 1103 archive_hmac_sha1_update(&zip->hctx, 1104 zip->buf, zip->len_buf); 1105 } 1106 ret = __archive_write_output(a, zip->buf, 1107 zip->len_buf); 1108 if (ret != ARCHIVE_OK) 1109 return (ret); 1110 zip->entry_compressed_written += zip->len_buf; 1111 zip->written_bytes += zip->len_buf; 1112 zip->stream.next_out = zip->buf; 1113 zip->stream.avail_out = (uInt)zip->len_buf; 1114 } 1115 } while (zip->stream.avail_in != 0); 1116 break; 1117 #endif 1118 1119 default: 1120 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1121 "Invalid ZIP compression type"); 1122 return ARCHIVE_FATAL; 1123 } 1124 1125 zip->entry_uncompressed_limit -= s; 1126 if (!zip->cctx_valid || zip->aes_vendor != AES_VENDOR_AE_2) 1127 zip->entry_crc32 = 1128 zip->crc32func(zip->entry_crc32, buff, (unsigned)s); 1129 return (s); 1130 1131 } 1132 1133 static int 1134 archive_write_zip_finish_entry(struct archive_write *a) 1135 { 1136 struct zip *zip = a->format_data; 1137 int ret; 1138 1139 #if HAVE_ZLIB_H 1140 if (zip->entry_compression == COMPRESSION_DEFLATE) { 1141 for (;;) { 1142 size_t remainder; 1143 1144 ret = deflate(&zip->stream, Z_FINISH); 1145 if (ret == Z_STREAM_ERROR) 1146 return (ARCHIVE_FATAL); 1147 remainder = zip->len_buf - zip->stream.avail_out; 1148 if (zip->tctx_valid) { 1149 trad_enc_encrypt_update(&zip->tctx, 1150 zip->buf, remainder, zip->buf, remainder); 1151 } else if (zip->cctx_valid) { 1152 size_t outl = remainder; 1153 ret = archive_encrypto_aes_ctr_update( 1154 &zip->cctx, zip->buf, remainder, 1155 zip->buf, &outl); 1156 if (ret < 0) { 1157 archive_set_error(&a->archive, 1158 ARCHIVE_ERRNO_MISC, 1159 "Failed to encrypt file"); 1160 return (ARCHIVE_FAILED); 1161 } 1162 archive_hmac_sha1_update(&zip->hctx, 1163 zip->buf, remainder); 1164 } 1165 ret = __archive_write_output(a, zip->buf, remainder); 1166 if (ret != ARCHIVE_OK) 1167 return (ret); 1168 zip->entry_compressed_written += remainder; 1169 zip->written_bytes += remainder; 1170 zip->stream.next_out = zip->buf; 1171 if (zip->stream.avail_out != 0) 1172 break; 1173 zip->stream.avail_out = (uInt)zip->len_buf; 1174 } 1175 deflateEnd(&zip->stream); 1176 } 1177 #endif 1178 if (zip->hctx_valid) { 1179 uint8_t hmac[20]; 1180 size_t hmac_len = 20; 1181 1182 archive_hmac_sha1_final(&zip->hctx, hmac, &hmac_len); 1183 ret = __archive_write_output(a, hmac, AUTH_CODE_SIZE); 1184 if (ret != ARCHIVE_OK) 1185 return (ret); 1186 zip->entry_compressed_written += AUTH_CODE_SIZE; 1187 zip->written_bytes += AUTH_CODE_SIZE; 1188 } 1189 1190 /* Write trailing data descriptor. */ 1191 if ((zip->entry_flags & ZIP_ENTRY_FLAG_LENGTH_AT_END) != 0) { 1192 char d[24]; 1193 memcpy(d, "PK\007\010", 4); 1194 if (zip->cctx_valid && zip->aes_vendor == AES_VENDOR_AE_2) 1195 archive_le32enc(d + 4, 0);/* no CRC.*/ 1196 else 1197 archive_le32enc(d + 4, zip->entry_crc32); 1198 if (zip->entry_uses_zip64) { 1199 archive_le64enc(d + 8, 1200 (uint64_t)zip->entry_compressed_written); 1201 archive_le64enc(d + 16, 1202 (uint64_t)zip->entry_uncompressed_written); 1203 ret = __archive_write_output(a, d, 24); 1204 zip->written_bytes += 24; 1205 } else { 1206 archive_le32enc(d + 8, 1207 (uint32_t)zip->entry_compressed_written); 1208 archive_le32enc(d + 12, 1209 (uint32_t)zip->entry_uncompressed_written); 1210 ret = __archive_write_output(a, d, 16); 1211 zip->written_bytes += 16; 1212 } 1213 if (ret != ARCHIVE_OK) 1214 return (ARCHIVE_FATAL); 1215 } 1216 1217 /* Append Zip64 extra data to central directory information. */ 1218 if (zip->entry_compressed_written > ZIP_4GB_MAX 1219 || zip->entry_uncompressed_written > ZIP_4GB_MAX 1220 || zip->entry_offset > ZIP_4GB_MAX) { 1221 unsigned char zip64[32]; 1222 unsigned char *z = zip64, *zd; 1223 memcpy(z, "\001\000\000\000", 4); 1224 z += 4; 1225 if (zip->entry_uncompressed_written >= ZIP_4GB_MAX) { 1226 archive_le64enc(z, zip->entry_uncompressed_written); 1227 z += 8; 1228 } 1229 if (zip->entry_compressed_written >= ZIP_4GB_MAX) { 1230 archive_le64enc(z, zip->entry_compressed_written); 1231 z += 8; 1232 } 1233 if (zip->entry_offset >= ZIP_4GB_MAX) { 1234 archive_le64enc(z, zip->entry_offset); 1235 z += 8; 1236 } 1237 archive_le16enc(zip64 + 2, (uint16_t)(z - (zip64 + 4))); 1238 zd = cd_alloc(zip, z - zip64); 1239 if (zd == NULL) { 1240 archive_set_error(&a->archive, ENOMEM, 1241 "Can't allocate zip data"); 1242 return (ARCHIVE_FATAL); 1243 } 1244 memcpy(zd, zip64, z - zip64); 1245 /* Zip64 means version needs to be set to at least 4.5 */ 1246 if (archive_le16dec(zip->file_header + 6) < 45) 1247 archive_le16enc(zip->file_header + 6, 45); 1248 } 1249 1250 /* Fix up central directory file header. */ 1251 if (zip->cctx_valid && zip->aes_vendor == AES_VENDOR_AE_2) 1252 archive_le32enc(zip->file_header + 16, 0);/* no CRC.*/ 1253 else 1254 archive_le32enc(zip->file_header + 16, zip->entry_crc32); 1255 archive_le32enc(zip->file_header + 20, 1256 (uint32_t)zipmin(zip->entry_compressed_written, 1257 ZIP_4GB_MAX)); 1258 archive_le32enc(zip->file_header + 24, 1259 (uint32_t)zipmin(zip->entry_uncompressed_written, 1260 ZIP_4GB_MAX)); 1261 archive_le16enc(zip->file_header + 30, 1262 (uint16_t)(zip->central_directory_bytes - zip->file_header_extra_offset)); 1263 archive_le32enc(zip->file_header + 42, 1264 (uint32_t)zipmin(zip->entry_offset, 1265 ZIP_4GB_MAX)); 1266 1267 return (ARCHIVE_OK); 1268 } 1269 1270 static int 1271 archive_write_zip_close(struct archive_write *a) 1272 { 1273 uint8_t buff[64]; 1274 int64_t offset_start, offset_end; 1275 struct zip *zip = a->format_data; 1276 struct cd_segment *segment; 1277 int ret; 1278 1279 offset_start = zip->written_bytes; 1280 segment = zip->central_directory; 1281 while (segment != NULL) { 1282 ret = __archive_write_output(a, 1283 segment->buff, segment->p - segment->buff); 1284 if (ret != ARCHIVE_OK) 1285 return (ARCHIVE_FATAL); 1286 zip->written_bytes += segment->p - segment->buff; 1287 segment = segment->next; 1288 } 1289 offset_end = zip->written_bytes; 1290 1291 /* If central dir info is too large, write Zip64 end-of-cd */ 1292 if (offset_end - offset_start > ZIP_4GB_MAX 1293 || offset_start > ZIP_4GB_MAX 1294 || zip->central_directory_entries > 0xffffUL 1295 || (zip->flags & ZIP_FLAG_FORCE_ZIP64)) { 1296 /* Zip64 end-of-cd record */ 1297 memset(buff, 0, 56); 1298 memcpy(buff, "PK\006\006", 4); 1299 archive_le64enc(buff + 4, 44); 1300 archive_le16enc(buff + 12, 45); 1301 archive_le16enc(buff + 14, 45); 1302 /* This is disk 0 of 0. */ 1303 archive_le64enc(buff + 24, zip->central_directory_entries); 1304 archive_le64enc(buff + 32, zip->central_directory_entries); 1305 archive_le64enc(buff + 40, offset_end - offset_start); 1306 archive_le64enc(buff + 48, offset_start); 1307 ret = __archive_write_output(a, buff, 56); 1308 if (ret != ARCHIVE_OK) 1309 return (ARCHIVE_FATAL); 1310 zip->written_bytes += 56; 1311 1312 /* Zip64 end-of-cd locator record. */ 1313 memset(buff, 0, 20); 1314 memcpy(buff, "PK\006\007", 4); 1315 archive_le32enc(buff + 4, 0); 1316 archive_le64enc(buff + 8, offset_end); 1317 archive_le32enc(buff + 16, 1); 1318 ret = __archive_write_output(a, buff, 20); 1319 if (ret != ARCHIVE_OK) 1320 return (ARCHIVE_FATAL); 1321 zip->written_bytes += 20; 1322 1323 } 1324 1325 /* Format and write end of central directory. */ 1326 memset(buff, 0, sizeof(buff)); 1327 memcpy(buff, "PK\005\006", 4); 1328 archive_le16enc(buff + 8, (uint16_t)zipmin(0xffffU, 1329 zip->central_directory_entries)); 1330 archive_le16enc(buff + 10, (uint16_t)zipmin(0xffffU, 1331 zip->central_directory_entries)); 1332 archive_le32enc(buff + 12, 1333 (uint32_t)zipmin(ZIP_4GB_MAX, (offset_end - offset_start))); 1334 archive_le32enc(buff + 16, 1335 (uint32_t)zipmin(ZIP_4GB_MAX, offset_start)); 1336 ret = __archive_write_output(a, buff, 22); 1337 if (ret != ARCHIVE_OK) 1338 return (ARCHIVE_FATAL); 1339 zip->written_bytes += 22; 1340 return (ARCHIVE_OK); 1341 } 1342 1343 static int 1344 archive_write_zip_free(struct archive_write *a) 1345 { 1346 struct zip *zip; 1347 struct cd_segment *segment; 1348 1349 zip = a->format_data; 1350 while (zip->central_directory != NULL) { 1351 segment = zip->central_directory; 1352 zip->central_directory = segment->next; 1353 free(segment->buff); 1354 free(segment); 1355 } 1356 free(zip->buf); 1357 archive_entry_free(zip->entry); 1358 if (zip->cctx_valid) 1359 archive_encrypto_aes_ctr_release(&zip->cctx); 1360 if (zip->hctx_valid) 1361 archive_hmac_sha1_cleanup(&zip->hctx); 1362 /* TODO: Free opt_sconv, sconv_default */ 1363 1364 free(zip); 1365 a->format_data = NULL; 1366 return (ARCHIVE_OK); 1367 } 1368 1369 /* Convert into MSDOS-style date/time. */ 1370 static unsigned int 1371 dos_time(const time_t unix_time) 1372 { 1373 struct tm *t; 1374 unsigned int dt; 1375 1376 /* This will not preserve time when creating/extracting the archive 1377 * on two systems with different time zones. */ 1378 t = localtime(&unix_time); 1379 1380 /* MSDOS-style date/time is only between 1980-01-01 and 2107-12-31 */ 1381 if (t->tm_year < 1980 - 1900) 1382 /* Set minimum date/time '1980-01-01 00:00:00'. */ 1383 dt = 0x00210000U; 1384 else if (t->tm_year > 2107 - 1900) 1385 /* Set maximum date/time '2107-12-31 23:59:58'. */ 1386 dt = 0xff9fbf7dU; 1387 else { 1388 dt = 0; 1389 dt += ((t->tm_year - 80) & 0x7f) << 9; 1390 dt += ((t->tm_mon + 1) & 0x0f) << 5; 1391 dt += (t->tm_mday & 0x1f); 1392 dt <<= 16; 1393 dt += (t->tm_hour & 0x1f) << 11; 1394 dt += (t->tm_min & 0x3f) << 5; 1395 dt += (t->tm_sec & 0x3e) >> 1; /* Only counting every 2 seconds. */ 1396 } 1397 return dt; 1398 } 1399 1400 static size_t 1401 path_length(struct archive_entry *entry) 1402 { 1403 mode_t type; 1404 const char *path; 1405 1406 type = archive_entry_filetype(entry); 1407 path = archive_entry_pathname(entry); 1408 1409 if (path == NULL) 1410 return (0); 1411 if (type == AE_IFDIR && 1412 (path[0] == '\0' || path[strlen(path) - 1] != '/')) { 1413 return strlen(path) + 1; 1414 } else { 1415 return strlen(path); 1416 } 1417 } 1418 1419 static int 1420 write_path(struct archive_entry *entry, struct archive_write *archive) 1421 { 1422 int ret; 1423 const char *path; 1424 mode_t type; 1425 size_t written_bytes; 1426 1427 path = archive_entry_pathname(entry); 1428 type = archive_entry_filetype(entry); 1429 written_bytes = 0; 1430 1431 if (path == NULL) 1432 return (ARCHIVE_FATAL); 1433 1434 ret = __archive_write_output(archive, path, strlen(path)); 1435 if (ret != ARCHIVE_OK) 1436 return (ARCHIVE_FATAL); 1437 written_bytes += strlen(path); 1438 1439 /* Folders are recognized by a trailing slash. */ 1440 if ((type == AE_IFDIR) & (path[strlen(path) - 1] != '/')) { 1441 ret = __archive_write_output(archive, "/", 1); 1442 if (ret != ARCHIVE_OK) 1443 return (ARCHIVE_FATAL); 1444 written_bytes += 1; 1445 } 1446 1447 return ((int)written_bytes); 1448 } 1449 1450 static void 1451 copy_path(struct archive_entry *entry, unsigned char *p) 1452 { 1453 const char *path; 1454 size_t pathlen; 1455 mode_t type; 1456 1457 path = archive_entry_pathname(entry); 1458 pathlen = strlen(path); 1459 type = archive_entry_filetype(entry); 1460 1461 memcpy(p, path, pathlen); 1462 1463 /* Folders are recognized by a trailing slash. */ 1464 if ((type == AE_IFDIR) & (path[pathlen - 1] != '/')) { 1465 p[pathlen] = '/'; 1466 p[pathlen + 1] = '\0'; 1467 } 1468 } 1469 1470 1471 static struct archive_string_conv * 1472 get_sconv(struct archive_write *a, struct zip *zip) 1473 { 1474 if (zip->opt_sconv != NULL) 1475 return (zip->opt_sconv); 1476 1477 if (!zip->init_default_conversion) { 1478 zip->sconv_default = 1479 archive_string_default_conversion_for_write(&(a->archive)); 1480 zip->init_default_conversion = 1; 1481 } 1482 return (zip->sconv_default); 1483 } 1484 1485 /* 1486 Traditional PKWARE Decryption functions. 1487 */ 1488 1489 static void 1490 trad_enc_update_keys(struct trad_enc_ctx *ctx, uint8_t c) 1491 { 1492 uint8_t t; 1493 #define CRC32(c, b) (crc32(c ^ 0xffffffffUL, &b, 1) ^ 0xffffffffUL) 1494 1495 ctx->keys[0] = CRC32(ctx->keys[0], c); 1496 ctx->keys[1] = (ctx->keys[1] + (ctx->keys[0] & 0xff)) * 134775813L + 1; 1497 t = (ctx->keys[1] >> 24) & 0xff; 1498 ctx->keys[2] = CRC32(ctx->keys[2], t); 1499 #undef CRC32 1500 } 1501 1502 static uint8_t 1503 trad_enc_decrypt_byte(struct trad_enc_ctx *ctx) 1504 { 1505 unsigned temp = ctx->keys[2] | 2; 1506 return (uint8_t)((temp * (temp ^ 1)) >> 8) & 0xff; 1507 } 1508 1509 static unsigned 1510 trad_enc_encrypt_update(struct trad_enc_ctx *ctx, const uint8_t *in, 1511 size_t in_len, uint8_t *out, size_t out_len) 1512 { 1513 unsigned i, max; 1514 1515 max = (unsigned)((in_len < out_len)? in_len: out_len); 1516 1517 for (i = 0; i < max; i++) { 1518 uint8_t t = in[i]; 1519 out[i] = t ^ trad_enc_decrypt_byte(ctx); 1520 trad_enc_update_keys(ctx, t); 1521 } 1522 return i; 1523 } 1524 1525 static int 1526 trad_enc_init(struct trad_enc_ctx *ctx, const char *pw, size_t pw_len) 1527 { 1528 1529 ctx->keys[0] = 305419896L; 1530 ctx->keys[1] = 591751049L; 1531 ctx->keys[2] = 878082192L; 1532 1533 for (;pw_len; --pw_len) 1534 trad_enc_update_keys(ctx, *pw++); 1535 return 0; 1536 } 1537 1538 static int 1539 is_traditional_pkware_encryption_supported(void) 1540 { 1541 uint8_t key[TRAD_HEADER_SIZE]; 1542 1543 if (archive_random(key, sizeof(key)-1) != ARCHIVE_OK) 1544 return (0); 1545 return (1); 1546 } 1547 1548 static int 1549 init_traditional_pkware_encryption(struct archive_write *a) 1550 { 1551 struct zip *zip = a->format_data; 1552 const char *passphrase; 1553 uint8_t key[TRAD_HEADER_SIZE]; 1554 uint8_t key_encrypted[TRAD_HEADER_SIZE]; 1555 int ret; 1556 1557 passphrase = __archive_write_get_passphrase(a); 1558 if (passphrase == NULL) { 1559 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1560 "Encryption needs passphrase"); 1561 return ARCHIVE_FAILED; 1562 } 1563 if (archive_random(key, sizeof(key)-1) != ARCHIVE_OK) { 1564 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1565 "Can't generate random number for encryption"); 1566 return ARCHIVE_FATAL; 1567 } 1568 trad_enc_init(&zip->tctx, passphrase, strlen(passphrase)); 1569 /* Set the last key code which will be used as a check code 1570 * for verifying passphrase in decryption. */ 1571 key[TRAD_HEADER_SIZE-1] = zip->trad_chkdat; 1572 trad_enc_encrypt_update(&zip->tctx, key, TRAD_HEADER_SIZE, 1573 key_encrypted, TRAD_HEADER_SIZE); 1574 /* Write encrypted keys in the top of the file content. */ 1575 ret = __archive_write_output(a, key_encrypted, TRAD_HEADER_SIZE); 1576 if (ret != ARCHIVE_OK) 1577 return (ret); 1578 zip->written_bytes += TRAD_HEADER_SIZE; 1579 zip->entry_compressed_written += TRAD_HEADER_SIZE; 1580 return (ret); 1581 } 1582 1583 static int 1584 init_winzip_aes_encryption(struct archive_write *a) 1585 { 1586 struct zip *zip = a->format_data; 1587 const char *passphrase; 1588 size_t key_len, salt_len; 1589 uint8_t salt[16 + 2]; 1590 uint8_t derived_key[MAX_DERIVED_KEY_BUF_SIZE]; 1591 int ret; 1592 1593 passphrase = __archive_write_get_passphrase(a); 1594 if (passphrase == NULL) { 1595 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1596 "Encryption needs passphrase"); 1597 return (ARCHIVE_FAILED); 1598 } 1599 if (zip->entry_encryption == ENCRYPTION_WINZIP_AES128) { 1600 salt_len = 8; 1601 key_len = 16; 1602 } else { 1603 /* AES 256 */ 1604 salt_len = 16; 1605 key_len = 32; 1606 } 1607 if (archive_random(salt, salt_len) != ARCHIVE_OK) { 1608 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1609 "Can't generate random number for encryption"); 1610 return (ARCHIVE_FATAL); 1611 } 1612 archive_pbkdf2_sha1(passphrase, strlen(passphrase), 1613 salt, salt_len, 1000, derived_key, key_len * 2 + 2); 1614 1615 ret = archive_encrypto_aes_ctr_init(&zip->cctx, derived_key, key_len); 1616 if (ret != 0) { 1617 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1618 "Decryption is unsupported due to lack of crypto library"); 1619 return (ARCHIVE_FAILED); 1620 } 1621 ret = archive_hmac_sha1_init(&zip->hctx, derived_key + key_len, 1622 key_len); 1623 if (ret != 0) { 1624 archive_encrypto_aes_ctr_release(&zip->cctx); 1625 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1626 "Failed to initialize HMAC-SHA1"); 1627 return (ARCHIVE_FAILED); 1628 } 1629 1630 /* Set a password verification value after the 'salt'. */ 1631 salt[salt_len] = derived_key[key_len * 2]; 1632 salt[salt_len + 1] = derived_key[key_len * 2 + 1]; 1633 1634 /* Write encrypted keys in the top of the file content. */ 1635 ret = __archive_write_output(a, salt, salt_len + 2); 1636 if (ret != ARCHIVE_OK) 1637 return (ret); 1638 zip->written_bytes += salt_len + 2; 1639 zip->entry_compressed_written += salt_len + 2; 1640 1641 return (ARCHIVE_OK); 1642 } 1643 1644 static int 1645 is_winzip_aes_encryption_supported(int encryption) 1646 { 1647 size_t key_len, salt_len; 1648 uint8_t salt[16 + 2]; 1649 uint8_t derived_key[MAX_DERIVED_KEY_BUF_SIZE]; 1650 archive_crypto_ctx cctx; 1651 archive_hmac_sha1_ctx hctx; 1652 int ret; 1653 1654 if (encryption == ENCRYPTION_WINZIP_AES128) { 1655 salt_len = 8; 1656 key_len = 16; 1657 } else { 1658 /* AES 256 */ 1659 salt_len = 16; 1660 key_len = 32; 1661 } 1662 if (archive_random(salt, salt_len) != ARCHIVE_OK) 1663 return (0); 1664 ret = archive_pbkdf2_sha1("p", 1, salt, salt_len, 1000, 1665 derived_key, key_len * 2 + 2); 1666 if (ret != 0) 1667 return (0); 1668 1669 ret = archive_encrypto_aes_ctr_init(&cctx, derived_key, key_len); 1670 if (ret != 0) 1671 return (0); 1672 ret = archive_hmac_sha1_init(&hctx, derived_key + key_len, 1673 key_len); 1674 archive_encrypto_aes_ctr_release(&cctx); 1675 if (ret != 0) 1676 return (0); 1677 archive_hmac_sha1_cleanup(&hctx); 1678 return (1); 1679 } 1680