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: stable/10/contrib/libarchive/libarchive/archive_write_set_format_zip.c 368708 2020-12-16 22:25:40Z mm $"); 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#include "archive_write_set_format_private.h" 61 62#ifndef HAVE_ZLIB_H 63#include "archive_crc32.h" 64#endif 65 66#define ZIP_ENTRY_FLAG_ENCRYPTED (1<<0) 67#define ZIP_ENTRY_FLAG_LENGTH_AT_END (1<<3) 68#define ZIP_ENTRY_FLAG_UTF8_NAME (1 << 11) 69 70#define ZIP_4GB_MAX ARCHIVE_LITERAL_LL(0xffffffff) 71#define ZIP_4GB_MAX_UNCOMPRESSED ARCHIVE_LITERAL_LL(0xff000000) 72 73enum compression { 74 COMPRESSION_UNSPECIFIED = -1, 75 COMPRESSION_STORE = 0, 76 COMPRESSION_DEFLATE = 8 77}; 78 79#ifdef HAVE_ZLIB_H 80#define COMPRESSION_DEFAULT COMPRESSION_DEFLATE 81#else 82#define COMPRESSION_DEFAULT COMPRESSION_STORE 83#endif 84 85enum encryption { 86 ENCRYPTION_NONE = 0, 87 ENCRYPTION_TRADITIONAL, /* Traditional PKWARE encryption. */ 88 ENCRYPTION_WINZIP_AES128, /* WinZIP AES-128 encryption. */ 89 ENCRYPTION_WINZIP_AES256, /* WinZIP AES-256 encryption. */ 90}; 91 92#define TRAD_HEADER_SIZE 12 93/* 94 * See "WinZip - AES Encryption Information" 95 * http://www.winzip.com/aes_info.htm 96 */ 97/* Value used in compression method. */ 98#define WINZIP_AES_ENCRYPTION 99 99/* A WinZip AES header size which is stored at the beginning of 100 * file contents. */ 101#define WINZIP_AES128_HEADER_SIZE (8 + 2) 102#define WINZIP_AES256_HEADER_SIZE (16 + 2) 103/* AES vendor version. */ 104#define AES_VENDOR_AE_1 0x0001 105#define AES_VENDOR_AE_2 0x0002 106/* Authentication code size. */ 107#define AUTH_CODE_SIZE 10 108/**/ 109#define MAX_DERIVED_KEY_BUF_SIZE (AES_MAX_KEY_SIZE * 2 + 2) 110 111struct cd_segment { 112 struct cd_segment *next; 113 size_t buff_size; 114 unsigned char *buff; 115 unsigned char *p; 116}; 117 118struct trad_enc_ctx { 119 uint32_t keys[3]; 120}; 121 122struct zip { 123 124 int64_t entry_offset; 125 int64_t entry_compressed_size; 126 int64_t entry_uncompressed_size; 127 int64_t entry_compressed_written; 128 int64_t entry_uncompressed_written; 129 int64_t entry_uncompressed_limit; 130 struct archive_entry *entry; 131 uint32_t entry_crc32; 132 enum compression entry_compression; 133 enum encryption entry_encryption; 134 int entry_flags; 135 int entry_uses_zip64; 136 int experiments; 137 struct trad_enc_ctx tctx; 138 char tctx_valid; 139 unsigned char trad_chkdat; 140 unsigned aes_vendor; 141 archive_crypto_ctx cctx; 142 char cctx_valid; 143 archive_hmac_sha1_ctx hctx; 144 char hctx_valid; 145 146 unsigned char *file_header; 147 size_t file_header_extra_offset; 148 unsigned long (*crc32func)(unsigned long crc, const void *buff, size_t len); 149 150 struct cd_segment *central_directory; 151 struct cd_segment *central_directory_last; 152 size_t central_directory_bytes; 153 size_t central_directory_entries; 154 155 int64_t written_bytes; /* Overall position in file. */ 156 157 struct archive_string_conv *opt_sconv; 158 struct archive_string_conv *sconv_default; 159 enum compression requested_compression; 160 int deflate_compression_level; 161 int init_default_conversion; 162 enum encryption encryption_type; 163 164#define ZIP_FLAG_AVOID_ZIP64 1 165#define ZIP_FLAG_FORCE_ZIP64 2 166#define ZIP_FLAG_EXPERIMENT_xl 4 167 int flags; 168 169#ifdef HAVE_ZLIB_H 170 z_stream stream; 171#endif 172 size_t len_buf; 173 unsigned char *buf; 174}; 175 176/* Don't call this min or MIN, since those are already defined 177 on lots of platforms (but not all). */ 178#define zipmin(a, b) ((a) > (b) ? (b) : (a)) 179 180static ssize_t archive_write_zip_data(struct archive_write *, 181 const void *buff, size_t s); 182static int archive_write_zip_close(struct archive_write *); 183static int archive_write_zip_free(struct archive_write *); 184static int archive_write_zip_finish_entry(struct archive_write *); 185static int archive_write_zip_header(struct archive_write *, 186 struct archive_entry *); 187static int archive_write_zip_options(struct archive_write *, 188 const char *, const char *); 189static unsigned int dos_time(const time_t); 190static size_t path_length(struct archive_entry *); 191static int write_path(struct archive_entry *, struct archive_write *); 192static void copy_path(struct archive_entry *, unsigned char *); 193static struct archive_string_conv *get_sconv(struct archive_write *, struct zip *); 194static int trad_enc_init(struct trad_enc_ctx *, const char *, size_t); 195static unsigned trad_enc_encrypt_update(struct trad_enc_ctx *, const uint8_t *, 196 size_t, uint8_t *, size_t); 197static int init_traditional_pkware_encryption(struct archive_write *); 198static int is_traditional_pkware_encryption_supported(void); 199static int init_winzip_aes_encryption(struct archive_write *); 200static int is_winzip_aes_encryption_supported(int encryption); 201 202static unsigned char * 203cd_alloc(struct zip *zip, size_t length) 204{ 205 unsigned char *p; 206 207 if (zip->central_directory == NULL 208 || (zip->central_directory_last->p + length 209 > zip->central_directory_last->buff + zip->central_directory_last->buff_size)) { 210 struct cd_segment *segment = calloc(1, sizeof(*segment)); 211 if (segment == NULL) 212 return NULL; 213 segment->buff_size = 64 * 1024; 214 segment->buff = malloc(segment->buff_size); 215 if (segment->buff == NULL) { 216 free(segment); 217 return NULL; 218 } 219 segment->p = segment->buff; 220 221 if (zip->central_directory == NULL) { 222 zip->central_directory 223 = zip->central_directory_last 224 = segment; 225 } else { 226 zip->central_directory_last->next = segment; 227 zip->central_directory_last = segment; 228 } 229 } 230 231 p = zip->central_directory_last->p; 232 zip->central_directory_last->p += length; 233 zip->central_directory_bytes += length; 234 return (p); 235} 236 237static unsigned long 238real_crc32(unsigned long crc, const void *buff, size_t len) 239{ 240 return crc32(crc, buff, (unsigned int)len); 241} 242 243static unsigned long 244fake_crc32(unsigned long crc, const void *buff, size_t len) 245{ 246 (void)crc; /* UNUSED */ 247 (void)buff; /* UNUSED */ 248 (void)len; /* UNUSED */ 249 return 0; 250} 251 252static int 253archive_write_zip_options(struct archive_write *a, const char *key, 254 const char *val) 255{ 256 struct zip *zip = a->format_data; 257 int ret = ARCHIVE_FAILED; 258 259 if (strcmp(key, "compression") == 0) { 260 /* 261 * Set compression to use on all future entries. 262 * This only affects regular files. 263 */ 264 if (val == NULL || val[0] == 0) { 265 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 266 "%s: compression option needs a compression name", 267 a->format_name); 268 } else if (strcmp(val, "deflate") == 0) { 269#ifdef HAVE_ZLIB_H 270 zip->requested_compression = COMPRESSION_DEFLATE; 271 ret = ARCHIVE_OK; 272#else 273 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 274 "deflate compression not supported"); 275#endif 276 } else if (strcmp(val, "store") == 0) { 277 zip->requested_compression = COMPRESSION_STORE; 278 ret = ARCHIVE_OK; 279 } 280 return (ret); 281 } else if (strcmp(key, "compression-level") == 0) { 282 if (val == NULL || !(val[0] >= '0' && val[0] <= '9') || val[1] != '\0') { 283 return ARCHIVE_WARN; 284 } 285 286 if (val[0] == '0') { 287 zip->requested_compression = COMPRESSION_STORE; 288 return ARCHIVE_OK; 289 } else { 290#ifdef HAVE_ZLIB_H 291 zip->requested_compression = COMPRESSION_DEFLATE; 292 zip->deflate_compression_level = val[0] - '0'; 293 return ARCHIVE_OK; 294#else 295 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 296 "deflate compression not supported"); 297#endif 298 } 299 } else if (strcmp(key, "encryption") == 0) { 300 if (val == NULL) { 301 zip->encryption_type = ENCRYPTION_NONE; 302 ret = ARCHIVE_OK; 303 } else if (val[0] == '1' || strcmp(val, "traditional") == 0 304 || strcmp(val, "zipcrypt") == 0 305 || strcmp(val, "ZipCrypt") == 0) { 306 if (is_traditional_pkware_encryption_supported()) { 307 zip->encryption_type = ENCRYPTION_TRADITIONAL; 308 ret = ARCHIVE_OK; 309 } else { 310 archive_set_error(&a->archive, 311 ARCHIVE_ERRNO_MISC, 312 "encryption not supported"); 313 } 314 } else if (strcmp(val, "aes128") == 0) { 315 if (is_winzip_aes_encryption_supported( 316 ENCRYPTION_WINZIP_AES128)) { 317 zip->encryption_type = ENCRYPTION_WINZIP_AES128; 318 ret = ARCHIVE_OK; 319 } else { 320 archive_set_error(&a->archive, 321 ARCHIVE_ERRNO_MISC, 322 "encryption not supported"); 323 } 324 } else if (strcmp(val, "aes256") == 0) { 325 if (is_winzip_aes_encryption_supported( 326 ENCRYPTION_WINZIP_AES256)) { 327 zip->encryption_type = ENCRYPTION_WINZIP_AES256; 328 ret = ARCHIVE_OK; 329 } else { 330 archive_set_error(&a->archive, 331 ARCHIVE_ERRNO_MISC, 332 "encryption not supported"); 333 } 334 } else { 335 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 336 "%s: unknown encryption '%s'", 337 a->format_name, val); 338 } 339 return (ret); 340 } else if (strcmp(key, "experimental") == 0) { 341 if (val == NULL || val[0] == 0) { 342 zip->flags &= ~ ZIP_FLAG_EXPERIMENT_xl; 343 } else { 344 zip->flags |= ZIP_FLAG_EXPERIMENT_xl; 345 } 346 return (ARCHIVE_OK); 347 } else if (strcmp(key, "fakecrc32") == 0) { 348 /* 349 * FOR TESTING ONLY: disable CRC calculation to speed up 350 * certain complex tests. 351 */ 352 if (val == NULL || val[0] == 0) { 353 zip->crc32func = real_crc32; 354 } else { 355 zip->crc32func = fake_crc32; 356 } 357 return (ARCHIVE_OK); 358 } else if (strcmp(key, "hdrcharset") == 0) { 359 /* 360 * Set the character set used in translating filenames. 361 */ 362 if (val == NULL || val[0] == 0) { 363 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 364 "%s: hdrcharset option needs a character-set name", 365 a->format_name); 366 } else { 367 zip->opt_sconv = archive_string_conversion_to_charset( 368 &a->archive, val, 0); 369 if (zip->opt_sconv != NULL) 370 ret = ARCHIVE_OK; 371 else 372 ret = ARCHIVE_FATAL; 373 } 374 return (ret); 375 } else if (strcmp(key, "zip64") == 0) { 376 /* 377 * Bias decisions about Zip64: force them to be 378 * generated in certain cases where they are not 379 * forbidden or avoid them in certain cases where they 380 * are not strictly required. 381 */ 382 if (val != NULL && *val != '\0') { 383 zip->flags |= ZIP_FLAG_FORCE_ZIP64; 384 zip->flags &= ~ZIP_FLAG_AVOID_ZIP64; 385 } else { 386 zip->flags &= ~ZIP_FLAG_FORCE_ZIP64; 387 zip->flags |= ZIP_FLAG_AVOID_ZIP64; 388 } 389 return (ARCHIVE_OK); 390 } 391 392 /* Note: The "warn" return is just to inform the options 393 * supervisor that we didn't handle it. It will generate 394 * a suitable error if no one used this option. */ 395 return (ARCHIVE_WARN); 396} 397 398int 399archive_write_zip_set_compression_deflate(struct archive *_a) 400{ 401 struct archive_write *a = (struct archive_write *)_a; 402 int ret = ARCHIVE_FAILED; 403 404 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 405 ARCHIVE_STATE_NEW | ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA, 406 "archive_write_zip_set_compression_deflate"); 407 if (a->archive.archive_format != ARCHIVE_FORMAT_ZIP) { 408 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 409 "Can only use archive_write_zip_set_compression_deflate" 410 " with zip format"); 411 ret = ARCHIVE_FATAL; 412 } else { 413#ifdef HAVE_ZLIB_H 414 struct zip *zip = a->format_data; 415 zip->requested_compression = COMPRESSION_DEFLATE; 416 ret = ARCHIVE_OK; 417#else 418 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 419 "deflate compression not supported"); 420 ret = ARCHIVE_FAILED; 421#endif 422 } 423 return (ret); 424} 425 426int 427archive_write_zip_set_compression_store(struct archive *_a) 428{ 429 struct archive_write *a = (struct archive_write *)_a; 430 struct zip *zip = a->format_data; 431 int ret = ARCHIVE_FAILED; 432 433 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 434 ARCHIVE_STATE_NEW | ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA, 435 "archive_write_zip_set_compression_deflate"); 436 if (a->archive.archive_format != ARCHIVE_FORMAT_ZIP) { 437 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 438 "Can only use archive_write_zip_set_compression_store" 439 " with zip format"); 440 ret = ARCHIVE_FATAL; 441 } else { 442 zip->requested_compression = COMPRESSION_STORE; 443 ret = ARCHIVE_OK; 444 } 445 return (ret); 446} 447 448int 449archive_write_set_format_zip(struct archive *_a) 450{ 451 struct archive_write *a = (struct archive_write *)_a; 452 struct zip *zip; 453 454 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 455 ARCHIVE_STATE_NEW, "archive_write_set_format_zip"); 456 457 /* If another format was already registered, unregister it. */ 458 if (a->format_free != NULL) 459 (a->format_free)(a); 460 461 zip = (struct zip *) calloc(1, sizeof(*zip)); 462 if (zip == NULL) { 463 archive_set_error(&a->archive, ENOMEM, 464 "Can't allocate zip data"); 465 return (ARCHIVE_FATAL); 466 } 467 468 /* "Unspecified" lets us choose the appropriate compression. */ 469 zip->requested_compression = COMPRESSION_UNSPECIFIED; 470#ifdef HAVE_ZLIB_H 471 zip->deflate_compression_level = Z_DEFAULT_COMPRESSION; 472#endif 473 zip->crc32func = real_crc32; 474 475 /* A buffer used for both compression and encryption. */ 476 zip->len_buf = 65536; 477 zip->buf = malloc(zip->len_buf); 478 if (zip->buf == NULL) { 479 free(zip); 480 archive_set_error(&a->archive, ENOMEM, 481 "Can't allocate compression buffer"); 482 return (ARCHIVE_FATAL); 483 } 484 485 a->format_data = zip; 486 a->format_name = "zip"; 487 a->format_options = archive_write_zip_options; 488 a->format_write_header = archive_write_zip_header; 489 a->format_write_data = archive_write_zip_data; 490 a->format_finish_entry = archive_write_zip_finish_entry; 491 a->format_close = archive_write_zip_close; 492 a->format_free = archive_write_zip_free; 493 a->archive.archive_format = ARCHIVE_FORMAT_ZIP; 494 a->archive.archive_format_name = "ZIP"; 495 496 return (ARCHIVE_OK); 497} 498 499static int 500is_all_ascii(const char *p) 501{ 502 const unsigned char *pp = (const unsigned char *)p; 503 504 while (*pp) { 505 if (*pp++ > 127) 506 return (0); 507 } 508 return (1); 509} 510 511static int 512archive_write_zip_header(struct archive_write *a, struct archive_entry *entry) 513{ 514 unsigned char local_header[32]; 515 unsigned char local_extra[144]; 516 struct zip *zip = a->format_data; 517 unsigned char *e; 518 unsigned char *cd_extra; 519 size_t filename_length; 520 const char *slink = NULL; 521 size_t slink_size = 0; 522 struct archive_string_conv *sconv = get_sconv(a, zip); 523 int ret, ret2 = ARCHIVE_OK; 524 mode_t type; 525 int version_needed = 10; 526 527 /* Ignore types of entries that we don't support. */ 528 type = archive_entry_filetype(entry); 529 if (type != AE_IFREG && type != AE_IFDIR && type != AE_IFLNK) { 530 __archive_write_entry_filetype_unsupported( 531 &a->archive, entry, "zip"); 532 return ARCHIVE_FAILED; 533 }; 534 535 /* If we're not using Zip64, reject large files. */ 536 if (zip->flags & ZIP_FLAG_AVOID_ZIP64) { 537 /* Reject entries over 4GB. */ 538 if (archive_entry_size_is_set(entry) 539 && (archive_entry_size(entry) > ZIP_4GB_MAX)) { 540 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 541 "Files > 4GB require Zip64 extensions"); 542 return ARCHIVE_FAILED; 543 } 544 /* Reject entries if archive is > 4GB. */ 545 if (zip->written_bytes > ZIP_4GB_MAX) { 546 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 547 "Archives > 4GB require Zip64 extensions"); 548 return ARCHIVE_FAILED; 549 } 550 } 551 552 /* Only regular files can have size > 0. */ 553 if (type != AE_IFREG) 554 archive_entry_set_size(entry, 0); 555 556 557 /* Reset information from last entry. */ 558 zip->entry_offset = zip->written_bytes; 559 zip->entry_uncompressed_limit = INT64_MAX; 560 zip->entry_compressed_size = 0; 561 zip->entry_uncompressed_size = 0; 562 zip->entry_compressed_written = 0; 563 zip->entry_uncompressed_written = 0; 564 zip->entry_flags = 0; 565 zip->entry_uses_zip64 = 0; 566 zip->entry_crc32 = zip->crc32func(0, NULL, 0); 567 zip->entry_encryption = 0; 568 archive_entry_free(zip->entry); 569 zip->entry = NULL; 570 571 if (zip->cctx_valid) 572 archive_encrypto_aes_ctr_release(&zip->cctx); 573 if (zip->hctx_valid) 574 archive_hmac_sha1_cleanup(&zip->hctx); 575 zip->tctx_valid = zip->cctx_valid = zip->hctx_valid = 0; 576 577 if (type == AE_IFREG 578 &&(!archive_entry_size_is_set(entry) 579 || archive_entry_size(entry) > 0)) { 580 switch (zip->encryption_type) { 581 case ENCRYPTION_TRADITIONAL: 582 case ENCRYPTION_WINZIP_AES128: 583 case ENCRYPTION_WINZIP_AES256: 584 zip->entry_flags |= ZIP_ENTRY_FLAG_ENCRYPTED; 585 zip->entry_encryption = zip->encryption_type; 586 break; 587 case ENCRYPTION_NONE: 588 default: 589 break; 590 } 591 } 592 593 594#if defined(_WIN32) && !defined(__CYGWIN__) 595 /* Make sure the path separators in pathname, hardlink and symlink 596 * are all slash '/', not the Windows path separator '\'. */ 597 zip->entry = __la_win_entry_in_posix_pathseparator(entry); 598 if (zip->entry == entry) 599 zip->entry = archive_entry_clone(entry); 600#else 601 zip->entry = archive_entry_clone(entry); 602#endif 603 if (zip->entry == NULL) { 604 archive_set_error(&a->archive, ENOMEM, 605 "Can't allocate zip header data"); 606 return (ARCHIVE_FATAL); 607 } 608 609 if (sconv != NULL) { 610 const char *p; 611 size_t len; 612 613 if (archive_entry_pathname_l(entry, &p, &len, sconv) != 0) { 614 if (errno == ENOMEM) { 615 archive_set_error(&a->archive, ENOMEM, 616 "Can't allocate memory for Pathname"); 617 return (ARCHIVE_FATAL); 618 } 619 archive_set_error(&a->archive, 620 ARCHIVE_ERRNO_FILE_FORMAT, 621 "Can't translate Pathname '%s' to %s", 622 archive_entry_pathname(entry), 623 archive_string_conversion_charset_name(sconv)); 624 ret2 = ARCHIVE_WARN; 625 } 626 if (len > 0) 627 archive_entry_set_pathname(zip->entry, p); 628 629 /* 630 * There is no standard for symlink handling; we convert 631 * it using the same character-set translation that we use 632 * for filename. 633 */ 634 if (type == AE_IFLNK) { 635 if (archive_entry_symlink_l(entry, &p, &len, sconv)) { 636 if (errno == ENOMEM) { 637 archive_set_error(&a->archive, ENOMEM, 638 "Can't allocate memory " 639 " for Symlink"); 640 return (ARCHIVE_FATAL); 641 } 642 /* No error if we can't convert. */ 643 } else if (len > 0) 644 archive_entry_set_symlink(zip->entry, p); 645 } 646 } 647 648 /* If filename isn't ASCII and we can use UTF-8, set the UTF-8 flag. */ 649 if (!is_all_ascii(archive_entry_pathname(zip->entry))) { 650 if (zip->opt_sconv != NULL) { 651 if (strcmp(archive_string_conversion_charset_name( 652 zip->opt_sconv), "UTF-8") == 0) 653 zip->entry_flags |= ZIP_ENTRY_FLAG_UTF8_NAME; 654#if HAVE_NL_LANGINFO 655 } else if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0) { 656 zip->entry_flags |= ZIP_ENTRY_FLAG_UTF8_NAME; 657#endif 658 } 659 } 660 filename_length = path_length(zip->entry); 661 662 /* Determine appropriate compression and size for this entry. */ 663 if (type == AE_IFLNK) { 664 slink = archive_entry_symlink(zip->entry); 665 if (slink != NULL) 666 slink_size = strlen(slink); 667 else 668 slink_size = 0; 669 zip->entry_uncompressed_limit = slink_size; 670 zip->entry_compressed_size = slink_size; 671 zip->entry_uncompressed_size = slink_size; 672 zip->entry_crc32 = zip->crc32func(zip->entry_crc32, 673 (const unsigned char *)slink, slink_size); 674 zip->entry_compression = COMPRESSION_STORE; 675 version_needed = 20; 676 } else if (type != AE_IFREG) { 677 zip->entry_compression = COMPRESSION_STORE; 678 zip->entry_uncompressed_limit = 0; 679 version_needed = 20; 680 } else if (archive_entry_size_is_set(zip->entry)) { 681 int64_t size = archive_entry_size(zip->entry); 682 int64_t additional_size = 0; 683 684 zip->entry_uncompressed_limit = size; 685 zip->entry_compression = zip->requested_compression; 686 if (zip->entry_compression == COMPRESSION_UNSPECIFIED) { 687 zip->entry_compression = COMPRESSION_DEFAULT; 688 } 689 if (zip->entry_compression == COMPRESSION_STORE) { 690 zip->entry_compressed_size = size; 691 zip->entry_uncompressed_size = size; 692 version_needed = 10; 693 } else { 694 zip->entry_uncompressed_size = size; 695 version_needed = 20; 696 } 697 698 if (zip->entry_flags & ZIP_ENTRY_FLAG_ENCRYPTED) { 699 switch (zip->entry_encryption) { 700 case ENCRYPTION_TRADITIONAL: 701 additional_size = TRAD_HEADER_SIZE; 702 version_needed = 20; 703 break; 704 case ENCRYPTION_WINZIP_AES128: 705 additional_size = WINZIP_AES128_HEADER_SIZE 706 + AUTH_CODE_SIZE; 707 version_needed = 20; 708 break; 709 case ENCRYPTION_WINZIP_AES256: 710 additional_size = WINZIP_AES256_HEADER_SIZE 711 + AUTH_CODE_SIZE; 712 version_needed = 20; 713 break; 714 case ENCRYPTION_NONE: 715 default: 716 break; 717 } 718 if (zip->entry_compression == COMPRESSION_STORE) 719 zip->entry_compressed_size += additional_size; 720 } 721 722 /* 723 * Set Zip64 extension in any of the following cases 724 * (this was suggested by discussion on info-zip-dev 725 * mailing list): 726 * = Zip64 is being forced by user 727 * = File is over 4GiB uncompressed 728 * (including encryption header, if any) 729 * = File is close to 4GiB and is being compressed 730 * (compression might make file larger) 731 */ 732 if ((zip->flags & ZIP_FLAG_FORCE_ZIP64) 733 || (zip->entry_uncompressed_size + additional_size > ZIP_4GB_MAX) 734 || (zip->entry_uncompressed_size > ZIP_4GB_MAX_UNCOMPRESSED 735 && zip->entry_compression != COMPRESSION_STORE)) { 736 zip->entry_uses_zip64 = 1; 737 version_needed = 45; 738 } 739 740 /* We may know the size, but never the CRC. */ 741 zip->entry_flags |= ZIP_ENTRY_FLAG_LENGTH_AT_END; 742 } else { 743 /* We don't know the size. In this case, we prefer 744 * deflate (it has a clear end-of-data marker which 745 * makes length-at-end more reliable) and will 746 * enable Zip64 extensions unless we're told not to. 747 */ 748 zip->entry_compression = COMPRESSION_DEFAULT; 749 zip->entry_flags |= ZIP_ENTRY_FLAG_LENGTH_AT_END; 750 if ((zip->flags & ZIP_FLAG_AVOID_ZIP64) == 0) { 751 zip->entry_uses_zip64 = 1; 752 version_needed = 45; 753 } else if (zip->entry_compression == COMPRESSION_STORE) { 754 version_needed = 10; 755 } else { 756 version_needed = 20; 757 } 758 759 if (zip->entry_flags & ZIP_ENTRY_FLAG_ENCRYPTED) { 760 switch (zip->entry_encryption) { 761 case ENCRYPTION_TRADITIONAL: 762 case ENCRYPTION_WINZIP_AES128: 763 case ENCRYPTION_WINZIP_AES256: 764 if (version_needed < 20) 765 version_needed = 20; 766 break; 767 case ENCRYPTION_NONE: 768 default: 769 break; 770 } 771 } 772 } 773 774 /* Format the local header. */ 775 memset(local_header, 0, sizeof(local_header)); 776 memcpy(local_header, "PK\003\004", 4); 777 archive_le16enc(local_header + 4, version_needed); 778 archive_le16enc(local_header + 6, zip->entry_flags); 779 if (zip->entry_encryption == ENCRYPTION_WINZIP_AES128 780 || zip->entry_encryption == ENCRYPTION_WINZIP_AES256) 781 archive_le16enc(local_header + 8, WINZIP_AES_ENCRYPTION); 782 else 783 archive_le16enc(local_header + 8, zip->entry_compression); 784 archive_le32enc(local_header + 10, 785 dos_time(archive_entry_mtime(zip->entry))); 786 archive_le32enc(local_header + 14, zip->entry_crc32); 787 if (zip->entry_uses_zip64) { 788 /* Zip64 data in the local header "must" include both 789 * compressed and uncompressed sizes AND those fields 790 * are included only if these are 0xffffffff; 791 * THEREFORE these must be set this way, even if we 792 * know one of them is smaller. */ 793 archive_le32enc(local_header + 18, ZIP_4GB_MAX); 794 archive_le32enc(local_header + 22, ZIP_4GB_MAX); 795 } else { 796 archive_le32enc(local_header + 18, (uint32_t)zip->entry_compressed_size); 797 archive_le32enc(local_header + 22, (uint32_t)zip->entry_uncompressed_size); 798 } 799 archive_le16enc(local_header + 26, (uint16_t)filename_length); 800 801 if (zip->entry_encryption == ENCRYPTION_TRADITIONAL) { 802 if (zip->entry_flags & ZIP_ENTRY_FLAG_LENGTH_AT_END) 803 zip->trad_chkdat = local_header[11]; 804 else 805 zip->trad_chkdat = local_header[17]; 806 } 807 808 /* Format as much of central directory file header as we can: */ 809 zip->file_header = cd_alloc(zip, 46); 810 /* If (zip->file_header == NULL) XXXX */ 811 ++zip->central_directory_entries; 812 memset(zip->file_header, 0, 46); 813 memcpy(zip->file_header, "PK\001\002", 4); 814 /* "Made by PKZip 2.0 on Unix." */ 815 archive_le16enc(zip->file_header + 4, 3 * 256 + version_needed); 816 archive_le16enc(zip->file_header + 6, version_needed); 817 archive_le16enc(zip->file_header + 8, zip->entry_flags); 818 if (zip->entry_encryption == ENCRYPTION_WINZIP_AES128 819 || zip->entry_encryption == ENCRYPTION_WINZIP_AES256) 820 archive_le16enc(zip->file_header + 10, WINZIP_AES_ENCRYPTION); 821 else 822 archive_le16enc(zip->file_header + 10, zip->entry_compression); 823 archive_le32enc(zip->file_header + 12, 824 dos_time(archive_entry_mtime(zip->entry))); 825 archive_le16enc(zip->file_header + 28, (uint16_t)filename_length); 826 /* Following Info-Zip, store mode in the "external attributes" field. */ 827 archive_le32enc(zip->file_header + 38, 828 ((uint32_t)archive_entry_mode(zip->entry)) << 16); 829 e = cd_alloc(zip, filename_length); 830 /* If (e == NULL) XXXX */ 831 copy_path(zip->entry, e); 832 833 /* Format extra data. */ 834 memset(local_extra, 0, sizeof(local_extra)); 835 e = local_extra; 836 837 /* First, extra blocks that are the same between 838 * the local file header and the central directory. 839 * We format them once and then duplicate them. */ 840 841 /* UT timestamp, length depends on what timestamps are set. */ 842 memcpy(e, "UT", 2); 843 archive_le16enc(e + 2, 844 1 845 + (archive_entry_mtime_is_set(entry) ? 4 : 0) 846 + (archive_entry_atime_is_set(entry) ? 4 : 0) 847 + (archive_entry_ctime_is_set(entry) ? 4 : 0)); 848 e += 4; 849 *e++ = 850 (archive_entry_mtime_is_set(entry) ? 1 : 0) 851 | (archive_entry_atime_is_set(entry) ? 2 : 0) 852 | (archive_entry_ctime_is_set(entry) ? 4 : 0); 853 if (archive_entry_mtime_is_set(entry)) { 854 archive_le32enc(e, (uint32_t)archive_entry_mtime(entry)); 855 e += 4; 856 } 857 if (archive_entry_atime_is_set(entry)) { 858 archive_le32enc(e, (uint32_t)archive_entry_atime(entry)); 859 e += 4; 860 } 861 if (archive_entry_ctime_is_set(entry)) { 862 archive_le32enc(e, (uint32_t)archive_entry_ctime(entry)); 863 e += 4; 864 } 865 866 /* ux Unix extra data, length 11, version 1 */ 867 /* TODO: If uid < 64k, use 2 bytes, ditto for gid. */ 868 memcpy(e, "ux\013\000\001", 5); 869 e += 5; 870 *e++ = 4; /* Length of following UID */ 871 archive_le32enc(e, (uint32_t)archive_entry_uid(entry)); 872 e += 4; 873 *e++ = 4; /* Length of following GID */ 874 archive_le32enc(e, (uint32_t)archive_entry_gid(entry)); 875 e += 4; 876 877 /* AES extra data field: WinZIP AES information, ID=0x9901 */ 878 if ((zip->entry_flags & ZIP_ENTRY_FLAG_ENCRYPTED) 879 && (zip->entry_encryption == ENCRYPTION_WINZIP_AES128 880 || zip->entry_encryption == ENCRYPTION_WINZIP_AES256)) { 881 882 memcpy(e, "\001\231\007\000\001\000AE", 8); 883 /* AES vendor version AE-2 does not store a CRC. 884 * WinZip 11 uses AE-1, which does store the CRC, 885 * but it does not store the CRC when the file size 886 * is less than 20 bytes. So we simulate what 887 * WinZip 11 does. 888 * NOTE: WinZip 9.0 and 10.0 uses AE-2 by default. */ 889 if (archive_entry_size_is_set(zip->entry) 890 && archive_entry_size(zip->entry) < 20) { 891 archive_le16enc(e+4, AES_VENDOR_AE_2); 892 zip->aes_vendor = AES_VENDOR_AE_2;/* no CRC. */ 893 } else 894 zip->aes_vendor = AES_VENDOR_AE_1; 895 e += 8; 896 /* AES encryption strength. */ 897 *e++ = (zip->entry_encryption == ENCRYPTION_WINZIP_AES128)?1:3; 898 /* Actual compression method. */ 899 archive_le16enc(e, zip->entry_compression); 900 e += 2; 901 } 902 903 /* Copy UT ,ux, and AES-extra into central directory as well. */ 904 zip->file_header_extra_offset = zip->central_directory_bytes; 905 cd_extra = cd_alloc(zip, e - local_extra); 906 memcpy(cd_extra, local_extra, e - local_extra); 907 908 /* 909 * Following extra blocks vary between local header and 910 * central directory. These are the local header versions. 911 * Central directory versions get formatted in 912 * archive_write_zip_finish_entry() below. 913 */ 914 915 /* "[Zip64 entry] in the local header MUST include BOTH 916 * original [uncompressed] and compressed size fields." */ 917 if (zip->entry_uses_zip64) { 918 unsigned char *zip64_start = e; 919 memcpy(e, "\001\000\020\000", 4); 920 e += 4; 921 archive_le64enc(e, zip->entry_uncompressed_size); 922 e += 8; 923 archive_le64enc(e, zip->entry_compressed_size); 924 e += 8; 925 archive_le16enc(zip64_start + 2, (uint16_t)(e - (zip64_start + 4))); 926 } 927 928 if (zip->flags & ZIP_FLAG_EXPERIMENT_xl) { 929 /* Experimental 'xl' extension to improve streaming. */ 930 unsigned char *external_info = e; 931 int included = 7; 932 memcpy(e, "xl\000\000", 4); // 0x6c65 + 2-byte length 933 e += 4; 934 e[0] = included; /* bitmap of included fields */ 935 e += 1; 936 if (included & 1) { 937 archive_le16enc(e, /* "Version created by" */ 938 3 * 256 + version_needed); 939 e += 2; 940 } 941 if (included & 2) { 942 archive_le16enc(e, 0); /* internal file attributes */ 943 e += 2; 944 } 945 if (included & 4) { 946 archive_le32enc(e, /* external file attributes */ 947 ((uint32_t)archive_entry_mode(zip->entry)) << 16); 948 e += 4; 949 } 950 if (included & 8) { 951 // Libarchive does not currently support file comments. 952 } 953 archive_le16enc(external_info + 2, (uint16_t)(e - (external_info + 4))); 954 } 955 956 /* Update local header with size of extra data and write it all out: */ 957 archive_le16enc(local_header + 28, (uint16_t)(e - local_extra)); 958 959 ret = __archive_write_output(a, local_header, 30); 960 if (ret != ARCHIVE_OK) 961 return (ARCHIVE_FATAL); 962 zip->written_bytes += 30; 963 964 ret = write_path(zip->entry, a); 965 if (ret <= ARCHIVE_OK) 966 return (ARCHIVE_FATAL); 967 zip->written_bytes += ret; 968 969 ret = __archive_write_output(a, local_extra, e - local_extra); 970 if (ret != ARCHIVE_OK) 971 return (ARCHIVE_FATAL); 972 zip->written_bytes += e - local_extra; 973 974 /* For symlinks, write the body now. */ 975 if (slink != NULL) { 976 ret = __archive_write_output(a, slink, slink_size); 977 if (ret != ARCHIVE_OK) 978 return (ARCHIVE_FATAL); 979 zip->entry_compressed_written += slink_size; 980 zip->entry_uncompressed_written += slink_size; 981 zip->written_bytes += slink_size; 982 } 983 984#ifdef HAVE_ZLIB_H 985 if (zip->entry_compression == COMPRESSION_DEFLATE) { 986 zip->stream.zalloc = Z_NULL; 987 zip->stream.zfree = Z_NULL; 988 zip->stream.opaque = Z_NULL; 989 zip->stream.next_out = zip->buf; 990 zip->stream.avail_out = (uInt)zip->len_buf; 991 if (deflateInit2(&zip->stream, zip->deflate_compression_level, 992 Z_DEFLATED, -15, 8, Z_DEFAULT_STRATEGY) != Z_OK) { 993 archive_set_error(&a->archive, ENOMEM, 994 "Can't init deflate compressor"); 995 return (ARCHIVE_FATAL); 996 } 997 } 998#endif 999 1000 return (ret2); 1001} 1002 1003static ssize_t 1004archive_write_zip_data(struct archive_write *a, const void *buff, size_t s) 1005{ 1006 int ret; 1007 struct zip *zip = a->format_data; 1008 1009 if ((int64_t)s > zip->entry_uncompressed_limit) 1010 s = (size_t)zip->entry_uncompressed_limit; 1011 zip->entry_uncompressed_written += s; 1012 1013 if (s == 0) return 0; 1014 1015 if (zip->entry_flags & ZIP_ENTRY_FLAG_ENCRYPTED) { 1016 switch (zip->entry_encryption) { 1017 case ENCRYPTION_TRADITIONAL: 1018 /* Initialize traditional PKWARE encryption context. */ 1019 if (!zip->tctx_valid) { 1020 ret = init_traditional_pkware_encryption(a); 1021 if (ret != ARCHIVE_OK) 1022 return (ret); 1023 zip->tctx_valid = 1; 1024 } 1025 break; 1026 case ENCRYPTION_WINZIP_AES128: 1027 case ENCRYPTION_WINZIP_AES256: 1028 if (!zip->cctx_valid) { 1029 ret = init_winzip_aes_encryption(a); 1030 if (ret != ARCHIVE_OK) 1031 return (ret); 1032 zip->cctx_valid = zip->hctx_valid = 1; 1033 } 1034 break; 1035 case ENCRYPTION_NONE: 1036 default: 1037 break; 1038 } 1039 } 1040 1041 switch (zip->entry_compression) { 1042 case COMPRESSION_STORE: 1043 if (zip->tctx_valid || zip->cctx_valid) { 1044 const uint8_t *rb = (const uint8_t *)buff; 1045 const uint8_t * const re = rb + s; 1046 1047 while (rb < re) { 1048 size_t l; 1049 1050 if (zip->tctx_valid) { 1051 l = trad_enc_encrypt_update(&zip->tctx, 1052 rb, re - rb, 1053 zip->buf, zip->len_buf); 1054 } else { 1055 l = zip->len_buf; 1056 ret = archive_encrypto_aes_ctr_update( 1057 &zip->cctx, 1058 rb, re - rb, zip->buf, &l); 1059 if (ret < 0) { 1060 archive_set_error(&a->archive, 1061 ARCHIVE_ERRNO_MISC, 1062 "Failed to encrypt file"); 1063 return (ARCHIVE_FAILED); 1064 } 1065 archive_hmac_sha1_update(&zip->hctx, 1066 zip->buf, l); 1067 } 1068 ret = __archive_write_output(a, zip->buf, l); 1069 if (ret != ARCHIVE_OK) 1070 return (ret); 1071 zip->entry_compressed_written += l; 1072 zip->written_bytes += l; 1073 rb += l; 1074 } 1075 } else { 1076 ret = __archive_write_output(a, buff, s); 1077 if (ret != ARCHIVE_OK) 1078 return (ret); 1079 zip->written_bytes += s; 1080 zip->entry_compressed_written += s; 1081 } 1082 break; 1083#if HAVE_ZLIB_H 1084 case COMPRESSION_DEFLATE: 1085 zip->stream.next_in = (unsigned char*)(uintptr_t)buff; 1086 zip->stream.avail_in = (uInt)s; 1087 do { 1088 ret = deflate(&zip->stream, Z_NO_FLUSH); 1089 if (ret == Z_STREAM_ERROR) 1090 return (ARCHIVE_FATAL); 1091 if (zip->stream.avail_out == 0) { 1092 if (zip->tctx_valid) { 1093 trad_enc_encrypt_update(&zip->tctx, 1094 zip->buf, zip->len_buf, 1095 zip->buf, zip->len_buf); 1096 } else if (zip->cctx_valid) { 1097 size_t outl = zip->len_buf; 1098 ret = archive_encrypto_aes_ctr_update( 1099 &zip->cctx, 1100 zip->buf, zip->len_buf, 1101 zip->buf, &outl); 1102 if (ret < 0) { 1103 archive_set_error(&a->archive, 1104 ARCHIVE_ERRNO_MISC, 1105 "Failed to encrypt file"); 1106 return (ARCHIVE_FAILED); 1107 } 1108 archive_hmac_sha1_update(&zip->hctx, 1109 zip->buf, zip->len_buf); 1110 } 1111 ret = __archive_write_output(a, zip->buf, 1112 zip->len_buf); 1113 if (ret != ARCHIVE_OK) 1114 return (ret); 1115 zip->entry_compressed_written += zip->len_buf; 1116 zip->written_bytes += zip->len_buf; 1117 zip->stream.next_out = zip->buf; 1118 zip->stream.avail_out = (uInt)zip->len_buf; 1119 } 1120 } while (zip->stream.avail_in != 0); 1121 break; 1122#endif 1123 1124 case COMPRESSION_UNSPECIFIED: 1125 default: 1126 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1127 "Invalid ZIP compression type"); 1128 return ARCHIVE_FATAL; 1129 } 1130 1131 zip->entry_uncompressed_limit -= s; 1132 if (!zip->cctx_valid || zip->aes_vendor != AES_VENDOR_AE_2) 1133 zip->entry_crc32 = 1134 zip->crc32func(zip->entry_crc32, buff, (unsigned)s); 1135 return (s); 1136 1137} 1138 1139static int 1140archive_write_zip_finish_entry(struct archive_write *a) 1141{ 1142 struct zip *zip = a->format_data; 1143 int ret; 1144 1145#if HAVE_ZLIB_H 1146 if (zip->entry_compression == COMPRESSION_DEFLATE) { 1147 for (;;) { 1148 size_t remainder; 1149 1150 ret = deflate(&zip->stream, Z_FINISH); 1151 if (ret == Z_STREAM_ERROR) 1152 return (ARCHIVE_FATAL); 1153 remainder = zip->len_buf - zip->stream.avail_out; 1154 if (zip->tctx_valid) { 1155 trad_enc_encrypt_update(&zip->tctx, 1156 zip->buf, remainder, zip->buf, remainder); 1157 } else if (zip->cctx_valid) { 1158 size_t outl = remainder; 1159 ret = archive_encrypto_aes_ctr_update( 1160 &zip->cctx, zip->buf, remainder, 1161 zip->buf, &outl); 1162 if (ret < 0) { 1163 archive_set_error(&a->archive, 1164 ARCHIVE_ERRNO_MISC, 1165 "Failed to encrypt file"); 1166 return (ARCHIVE_FAILED); 1167 } 1168 archive_hmac_sha1_update(&zip->hctx, 1169 zip->buf, remainder); 1170 } 1171 ret = __archive_write_output(a, zip->buf, remainder); 1172 if (ret != ARCHIVE_OK) 1173 return (ret); 1174 zip->entry_compressed_written += remainder; 1175 zip->written_bytes += remainder; 1176 zip->stream.next_out = zip->buf; 1177 if (zip->stream.avail_out != 0) 1178 break; 1179 zip->stream.avail_out = (uInt)zip->len_buf; 1180 } 1181 deflateEnd(&zip->stream); 1182 } 1183#endif 1184 if (zip->hctx_valid) { 1185 uint8_t hmac[20]; 1186 size_t hmac_len = 20; 1187 1188 archive_hmac_sha1_final(&zip->hctx, hmac, &hmac_len); 1189 ret = __archive_write_output(a, hmac, AUTH_CODE_SIZE); 1190 if (ret != ARCHIVE_OK) 1191 return (ret); 1192 zip->entry_compressed_written += AUTH_CODE_SIZE; 1193 zip->written_bytes += AUTH_CODE_SIZE; 1194 } 1195 1196 /* Write trailing data descriptor. */ 1197 if ((zip->entry_flags & ZIP_ENTRY_FLAG_LENGTH_AT_END) != 0) { 1198 char d[24]; 1199 memcpy(d, "PK\007\010", 4); 1200 if (zip->cctx_valid && zip->aes_vendor == AES_VENDOR_AE_2) 1201 archive_le32enc(d + 4, 0);/* no CRC.*/ 1202 else 1203 archive_le32enc(d + 4, zip->entry_crc32); 1204 if (zip->entry_uses_zip64) { 1205 archive_le64enc(d + 8, 1206 (uint64_t)zip->entry_compressed_written); 1207 archive_le64enc(d + 16, 1208 (uint64_t)zip->entry_uncompressed_written); 1209 ret = __archive_write_output(a, d, 24); 1210 zip->written_bytes += 24; 1211 } else { 1212 archive_le32enc(d + 8, 1213 (uint32_t)zip->entry_compressed_written); 1214 archive_le32enc(d + 12, 1215 (uint32_t)zip->entry_uncompressed_written); 1216 ret = __archive_write_output(a, d, 16); 1217 zip->written_bytes += 16; 1218 } 1219 if (ret != ARCHIVE_OK) 1220 return (ARCHIVE_FATAL); 1221 } 1222 1223 /* Append Zip64 extra data to central directory information. */ 1224 if (zip->entry_compressed_written > ZIP_4GB_MAX 1225 || zip->entry_uncompressed_written > ZIP_4GB_MAX 1226 || zip->entry_offset > ZIP_4GB_MAX) { 1227 unsigned char zip64[32]; 1228 unsigned char *z = zip64, *zd; 1229 memcpy(z, "\001\000\000\000", 4); 1230 z += 4; 1231 if (zip->entry_uncompressed_written >= ZIP_4GB_MAX) { 1232 archive_le64enc(z, zip->entry_uncompressed_written); 1233 z += 8; 1234 } 1235 if (zip->entry_compressed_written >= ZIP_4GB_MAX) { 1236 archive_le64enc(z, zip->entry_compressed_written); 1237 z += 8; 1238 } 1239 if (zip->entry_offset >= ZIP_4GB_MAX) { 1240 archive_le64enc(z, zip->entry_offset); 1241 z += 8; 1242 } 1243 archive_le16enc(zip64 + 2, (uint16_t)(z - (zip64 + 4))); 1244 zd = cd_alloc(zip, z - zip64); 1245 if (zd == NULL) { 1246 archive_set_error(&a->archive, ENOMEM, 1247 "Can't allocate zip data"); 1248 return (ARCHIVE_FATAL); 1249 } 1250 memcpy(zd, zip64, z - zip64); 1251 /* Zip64 means version needs to be set to at least 4.5 */ 1252 if (archive_le16dec(zip->file_header + 6) < 45) 1253 archive_le16enc(zip->file_header + 6, 45); 1254 } 1255 1256 /* Fix up central directory file header. */ 1257 if (zip->cctx_valid && zip->aes_vendor == AES_VENDOR_AE_2) 1258 archive_le32enc(zip->file_header + 16, 0);/* no CRC.*/ 1259 else 1260 archive_le32enc(zip->file_header + 16, zip->entry_crc32); 1261 archive_le32enc(zip->file_header + 20, 1262 (uint32_t)zipmin(zip->entry_compressed_written, 1263 ZIP_4GB_MAX)); 1264 archive_le32enc(zip->file_header + 24, 1265 (uint32_t)zipmin(zip->entry_uncompressed_written, 1266 ZIP_4GB_MAX)); 1267 archive_le16enc(zip->file_header + 30, 1268 (uint16_t)(zip->central_directory_bytes - zip->file_header_extra_offset)); 1269 archive_le32enc(zip->file_header + 42, 1270 (uint32_t)zipmin(zip->entry_offset, 1271 ZIP_4GB_MAX)); 1272 1273 return (ARCHIVE_OK); 1274} 1275 1276static int 1277archive_write_zip_close(struct archive_write *a) 1278{ 1279 uint8_t buff[64]; 1280 int64_t offset_start, offset_end; 1281 struct zip *zip = a->format_data; 1282 struct cd_segment *segment; 1283 int ret; 1284 1285 offset_start = zip->written_bytes; 1286 segment = zip->central_directory; 1287 while (segment != NULL) { 1288 ret = __archive_write_output(a, 1289 segment->buff, segment->p - segment->buff); 1290 if (ret != ARCHIVE_OK) 1291 return (ARCHIVE_FATAL); 1292 zip->written_bytes += segment->p - segment->buff; 1293 segment = segment->next; 1294 } 1295 offset_end = zip->written_bytes; 1296 1297 /* If central dir info is too large, write Zip64 end-of-cd */ 1298 if (offset_end - offset_start > ZIP_4GB_MAX 1299 || offset_start > ZIP_4GB_MAX 1300 || zip->central_directory_entries > 0xffffUL 1301 || (zip->flags & ZIP_FLAG_FORCE_ZIP64)) { 1302 /* Zip64 end-of-cd record */ 1303 memset(buff, 0, 56); 1304 memcpy(buff, "PK\006\006", 4); 1305 archive_le64enc(buff + 4, 44); 1306 archive_le16enc(buff + 12, 45); 1307 archive_le16enc(buff + 14, 45); 1308 /* This is disk 0 of 0. */ 1309 archive_le64enc(buff + 24, zip->central_directory_entries); 1310 archive_le64enc(buff + 32, zip->central_directory_entries); 1311 archive_le64enc(buff + 40, offset_end - offset_start); 1312 archive_le64enc(buff + 48, offset_start); 1313 ret = __archive_write_output(a, buff, 56); 1314 if (ret != ARCHIVE_OK) 1315 return (ARCHIVE_FATAL); 1316 zip->written_bytes += 56; 1317 1318 /* Zip64 end-of-cd locator record. */ 1319 memset(buff, 0, 20); 1320 memcpy(buff, "PK\006\007", 4); 1321 archive_le32enc(buff + 4, 0); 1322 archive_le64enc(buff + 8, offset_end); 1323 archive_le32enc(buff + 16, 1); 1324 ret = __archive_write_output(a, buff, 20); 1325 if (ret != ARCHIVE_OK) 1326 return (ARCHIVE_FATAL); 1327 zip->written_bytes += 20; 1328 1329 } 1330 1331 /* Format and write end of central directory. */ 1332 memset(buff, 0, sizeof(buff)); 1333 memcpy(buff, "PK\005\006", 4); 1334 archive_le16enc(buff + 8, (uint16_t)zipmin(0xffffU, 1335 zip->central_directory_entries)); 1336 archive_le16enc(buff + 10, (uint16_t)zipmin(0xffffU, 1337 zip->central_directory_entries)); 1338 archive_le32enc(buff + 12, 1339 (uint32_t)zipmin(ZIP_4GB_MAX, (offset_end - offset_start))); 1340 archive_le32enc(buff + 16, 1341 (uint32_t)zipmin(ZIP_4GB_MAX, offset_start)); 1342 ret = __archive_write_output(a, buff, 22); 1343 if (ret != ARCHIVE_OK) 1344 return (ARCHIVE_FATAL); 1345 zip->written_bytes += 22; 1346 return (ARCHIVE_OK); 1347} 1348 1349static int 1350archive_write_zip_free(struct archive_write *a) 1351{ 1352 struct zip *zip; 1353 struct cd_segment *segment; 1354 1355 zip = a->format_data; 1356 while (zip->central_directory != NULL) { 1357 segment = zip->central_directory; 1358 zip->central_directory = segment->next; 1359 free(segment->buff); 1360 free(segment); 1361 } 1362 free(zip->buf); 1363 archive_entry_free(zip->entry); 1364 if (zip->cctx_valid) 1365 archive_encrypto_aes_ctr_release(&zip->cctx); 1366 if (zip->hctx_valid) 1367 archive_hmac_sha1_cleanup(&zip->hctx); 1368 /* TODO: Free opt_sconv, sconv_default */ 1369 1370 free(zip); 1371 a->format_data = NULL; 1372 return (ARCHIVE_OK); 1373} 1374 1375/* Convert into MSDOS-style date/time. */ 1376static unsigned int 1377dos_time(const time_t unix_time) 1378{ 1379 struct tm *t; 1380 unsigned int dt; 1381#if defined(HAVE_LOCALTIME_R) || defined(HAVE__LOCALTIME64_S) 1382 struct tm tmbuf; 1383#endif 1384#if defined(HAVE__LOCALTIME64_S) 1385 errno_t terr; 1386 __time64_t tmptime; 1387#endif 1388 1389 /* This will not preserve time when creating/extracting the archive 1390 * on two systems with different time zones. */ 1391#if defined(HAVE_LOCALTIME_R) 1392 t = localtime_r(&unix_time, &tmbuf); 1393#elif defined(HAVE__LOCALTIME64_S) 1394 tmptime = unix_time; 1395 terr = _localtime64_s(&tmbuf, &tmptime); 1396 if (terr) 1397 t = NULL; 1398 else 1399 t = &tmbuf; 1400#else 1401 t = localtime(&unix_time); 1402#endif 1403 1404 /* MSDOS-style date/time is only between 1980-01-01 and 2107-12-31 */ 1405 if (t->tm_year < 1980 - 1900) 1406 /* Set minimum date/time '1980-01-01 00:00:00'. */ 1407 dt = 0x00210000U; 1408 else if (t->tm_year > 2107 - 1900) 1409 /* Set maximum date/time '2107-12-31 23:59:58'. */ 1410 dt = 0xff9fbf7dU; 1411 else { 1412 dt = 0; 1413 dt += ((t->tm_year - 80) & 0x7f) << 9; 1414 dt += ((t->tm_mon + 1) & 0x0f) << 5; 1415 dt += (t->tm_mday & 0x1f); 1416 dt <<= 16; 1417 dt += (t->tm_hour & 0x1f) << 11; 1418 dt += (t->tm_min & 0x3f) << 5; 1419 dt += (t->tm_sec & 0x3e) >> 1; /* Only counting every 2 seconds. */ 1420 } 1421 return dt; 1422} 1423 1424static size_t 1425path_length(struct archive_entry *entry) 1426{ 1427 mode_t type; 1428 const char *path; 1429 size_t len; 1430 1431 type = archive_entry_filetype(entry); 1432 path = archive_entry_pathname(entry); 1433 1434 if (path == NULL) 1435 return (0); 1436 len = strlen(path); 1437 if (type == AE_IFDIR && (path[0] == '\0' || path[len - 1] != '/')) 1438 ++len; /* Space for the trailing / */ 1439 return len; 1440} 1441 1442static int 1443write_path(struct archive_entry *entry, struct archive_write *archive) 1444{ 1445 int ret; 1446 const char *path; 1447 mode_t type; 1448 size_t written_bytes; 1449 1450 path = archive_entry_pathname(entry); 1451 type = archive_entry_filetype(entry); 1452 written_bytes = 0; 1453 1454 if (path == NULL) 1455 return (ARCHIVE_FATAL); 1456 1457 ret = __archive_write_output(archive, path, strlen(path)); 1458 if (ret != ARCHIVE_OK) 1459 return (ARCHIVE_FATAL); 1460 written_bytes += strlen(path); 1461 1462 /* Folders are recognized by a trailing slash. */ 1463 if ((type == AE_IFDIR) & (path[strlen(path) - 1] != '/')) { 1464 ret = __archive_write_output(archive, "/", 1); 1465 if (ret != ARCHIVE_OK) 1466 return (ARCHIVE_FATAL); 1467 written_bytes += 1; 1468 } 1469 1470 return ((int)written_bytes); 1471} 1472 1473static void 1474copy_path(struct archive_entry *entry, unsigned char *p) 1475{ 1476 const char *path; 1477 size_t pathlen; 1478 mode_t type; 1479 1480 path = archive_entry_pathname(entry); 1481 pathlen = strlen(path); 1482 type = archive_entry_filetype(entry); 1483 1484 memcpy(p, path, pathlen); 1485 1486 /* Folders are recognized by a trailing slash. */ 1487 if ((type == AE_IFDIR) && (path[pathlen - 1] != '/')) 1488 p[pathlen] = '/'; 1489} 1490 1491 1492static struct archive_string_conv * 1493get_sconv(struct archive_write *a, struct zip *zip) 1494{ 1495 if (zip->opt_sconv != NULL) 1496 return (zip->opt_sconv); 1497 1498 if (!zip->init_default_conversion) { 1499 zip->sconv_default = 1500 archive_string_default_conversion_for_write(&(a->archive)); 1501 zip->init_default_conversion = 1; 1502 } 1503 return (zip->sconv_default); 1504} 1505 1506/* 1507 Traditional PKWARE Decryption functions. 1508 */ 1509 1510static void 1511trad_enc_update_keys(struct trad_enc_ctx *ctx, uint8_t c) 1512{ 1513 uint8_t t; 1514#define CRC32(c, b) (crc32(c ^ 0xffffffffUL, &b, 1) ^ 0xffffffffUL) 1515 1516 ctx->keys[0] = CRC32(ctx->keys[0], c); 1517 ctx->keys[1] = (ctx->keys[1] + (ctx->keys[0] & 0xff)) * 134775813L + 1; 1518 t = (ctx->keys[1] >> 24) & 0xff; 1519 ctx->keys[2] = CRC32(ctx->keys[2], t); 1520#undef CRC32 1521} 1522 1523static uint8_t 1524trad_enc_decrypt_byte(struct trad_enc_ctx *ctx) 1525{ 1526 unsigned temp = ctx->keys[2] | 2; 1527 return (uint8_t)((temp * (temp ^ 1)) >> 8) & 0xff; 1528} 1529 1530static unsigned 1531trad_enc_encrypt_update(struct trad_enc_ctx *ctx, const uint8_t *in, 1532 size_t in_len, uint8_t *out, size_t out_len) 1533{ 1534 unsigned i, max; 1535 1536 max = (unsigned)((in_len < out_len)? in_len: out_len); 1537 1538 for (i = 0; i < max; i++) { 1539 uint8_t t = in[i]; 1540 out[i] = t ^ trad_enc_decrypt_byte(ctx); 1541 trad_enc_update_keys(ctx, t); 1542 } 1543 return i; 1544} 1545 1546static int 1547trad_enc_init(struct trad_enc_ctx *ctx, const char *pw, size_t pw_len) 1548{ 1549 1550 ctx->keys[0] = 305419896L; 1551 ctx->keys[1] = 591751049L; 1552 ctx->keys[2] = 878082192L; 1553 1554 for (;pw_len; --pw_len) 1555 trad_enc_update_keys(ctx, *pw++); 1556 return 0; 1557} 1558 1559static int 1560is_traditional_pkware_encryption_supported(void) 1561{ 1562 uint8_t key[TRAD_HEADER_SIZE]; 1563 1564 if (archive_random(key, sizeof(key)-1) != ARCHIVE_OK) 1565 return (0); 1566 return (1); 1567} 1568 1569static int 1570init_traditional_pkware_encryption(struct archive_write *a) 1571{ 1572 struct zip *zip = a->format_data; 1573 const char *passphrase; 1574 uint8_t key[TRAD_HEADER_SIZE]; 1575 uint8_t key_encrypted[TRAD_HEADER_SIZE]; 1576 int ret; 1577 1578 passphrase = __archive_write_get_passphrase(a); 1579 if (passphrase == NULL) { 1580 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1581 "Encryption needs passphrase"); 1582 return ARCHIVE_FAILED; 1583 } 1584 if (archive_random(key, sizeof(key)-1) != ARCHIVE_OK) { 1585 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1586 "Can't generate random number for encryption"); 1587 return ARCHIVE_FATAL; 1588 } 1589 trad_enc_init(&zip->tctx, passphrase, strlen(passphrase)); 1590 /* Set the last key code which will be used as a check code 1591 * for verifying passphrase in decryption. */ 1592 key[TRAD_HEADER_SIZE-1] = zip->trad_chkdat; 1593 trad_enc_encrypt_update(&zip->tctx, key, TRAD_HEADER_SIZE, 1594 key_encrypted, TRAD_HEADER_SIZE); 1595 /* Write encrypted keys in the top of the file content. */ 1596 ret = __archive_write_output(a, key_encrypted, TRAD_HEADER_SIZE); 1597 if (ret != ARCHIVE_OK) 1598 return (ret); 1599 zip->written_bytes += TRAD_HEADER_SIZE; 1600 zip->entry_compressed_written += TRAD_HEADER_SIZE; 1601 return (ret); 1602} 1603 1604static int 1605init_winzip_aes_encryption(struct archive_write *a) 1606{ 1607 struct zip *zip = a->format_data; 1608 const char *passphrase; 1609 size_t key_len, salt_len; 1610 uint8_t salt[16 + 2]; 1611 uint8_t derived_key[MAX_DERIVED_KEY_BUF_SIZE]; 1612 int ret; 1613 1614 passphrase = __archive_write_get_passphrase(a); 1615 if (passphrase == NULL) { 1616 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1617 "Encryption needs passphrase"); 1618 return (ARCHIVE_FAILED); 1619 } 1620 if (zip->entry_encryption == ENCRYPTION_WINZIP_AES128) { 1621 salt_len = 8; 1622 key_len = 16; 1623 } else { 1624 /* AES 256 */ 1625 salt_len = 16; 1626 key_len = 32; 1627 } 1628 if (archive_random(salt, salt_len) != ARCHIVE_OK) { 1629 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1630 "Can't generate random number for encryption"); 1631 return (ARCHIVE_FATAL); 1632 } 1633 archive_pbkdf2_sha1(passphrase, strlen(passphrase), 1634 salt, salt_len, 1000, derived_key, key_len * 2 + 2); 1635 1636 ret = archive_encrypto_aes_ctr_init(&zip->cctx, derived_key, key_len); 1637 if (ret != 0) { 1638 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1639 "Decryption is unsupported due to lack of crypto library"); 1640 return (ARCHIVE_FAILED); 1641 } 1642 ret = archive_hmac_sha1_init(&zip->hctx, derived_key + key_len, 1643 key_len); 1644 if (ret != 0) { 1645 archive_encrypto_aes_ctr_release(&zip->cctx); 1646 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1647 "Failed to initialize HMAC-SHA1"); 1648 return (ARCHIVE_FAILED); 1649 } 1650 1651 /* Set a password verification value after the 'salt'. */ 1652 salt[salt_len] = derived_key[key_len * 2]; 1653 salt[salt_len + 1] = derived_key[key_len * 2 + 1]; 1654 1655 /* Write encrypted keys in the top of the file content. */ 1656 ret = __archive_write_output(a, salt, salt_len + 2); 1657 if (ret != ARCHIVE_OK) 1658 return (ret); 1659 zip->written_bytes += salt_len + 2; 1660 zip->entry_compressed_written += salt_len + 2; 1661 1662 return (ARCHIVE_OK); 1663} 1664 1665static int 1666is_winzip_aes_encryption_supported(int encryption) 1667{ 1668 size_t key_len, salt_len; 1669 uint8_t salt[16 + 2]; 1670 uint8_t derived_key[MAX_DERIVED_KEY_BUF_SIZE]; 1671 archive_crypto_ctx cctx; 1672 archive_hmac_sha1_ctx hctx; 1673 int ret; 1674 1675 if (encryption == ENCRYPTION_WINZIP_AES128) { 1676 salt_len = 8; 1677 key_len = 16; 1678 } else { 1679 /* AES 256 */ 1680 salt_len = 16; 1681 key_len = 32; 1682 } 1683 if (archive_random(salt, salt_len) != ARCHIVE_OK) 1684 return (0); 1685 ret = archive_pbkdf2_sha1("p", 1, salt, salt_len, 1000, 1686 derived_key, key_len * 2 + 2); 1687 if (ret != 0) 1688 return (0); 1689 1690 ret = archive_encrypto_aes_ctr_init(&cctx, derived_key, key_len); 1691 if (ret != 0) 1692 return (0); 1693 ret = archive_hmac_sha1_init(&hctx, derived_key + key_len, 1694 key_len); 1695 archive_encrypto_aes_ctr_release(&cctx); 1696 if (ret != 0) 1697 return (0); 1698 archive_hmac_sha1_cleanup(&hctx); 1699 return (1); 1700} 1701