/* zip_source_win32file.c -- create data source from HANDLE (Win32) Copyright (C) 1999-2016 Dieter Baron and Thomas Klausner This file is part of libzip, a library to manipulate ZIP archives. The authors can be contacted at Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. The names of the authors may not be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include "zipint.h" #include "zipwin32.h" static zip_int64_t _win32_read_file(void *state, void *data, zip_uint64_t len, zip_source_cmd_t cmd); static int _win32_create_temp_file(_zip_source_win32_read_file_t *ctx); static int _zip_filetime_to_time_t(FILETIME ft, time_t *t); static int _zip_seek_win32_u(void *h, zip_uint64_t offset, int whence, zip_error_t *error); static int _zip_seek_win32(void *h, zip_int64_t offset, int whence, zip_error_t *error); static int _zip_win32_error_to_errno(unsigned long win32err); static int _zip_stat_win32(void *h, zip_stat_t *st, _zip_source_win32_read_file_t *ctx); ZIP_EXTERN zip_source_t * zip_source_win32handle(zip_t *za, HANDLE h, zip_uint64_t start, zip_int64_t len) { if (za == NULL) return NULL; return zip_source_win32handle_create(h, start, len, &za->error); } ZIP_EXTERN zip_source_t * zip_source_win32handle_create(HANDLE h, zip_uint64_t start, zip_int64_t length, zip_error_t *error) { if (h == INVALID_HANDLE_VALUE || length < -1) { zip_error_set(error, ZIP_ER_INVAL, 0); return NULL; } return _zip_source_win32_handle_or_name(NULL, h, start, length, 1, NULL, NULL, error); } zip_source_t * _zip_source_win32_handle_or_name(const void *fname, HANDLE h, zip_uint64_t start, zip_int64_t len, int closep, const zip_stat_t *st, _zip_source_win32_file_ops_t *ops, zip_error_t *error) { _zip_source_win32_read_file_t *ctx; zip_source_t *zs; if (h == INVALID_HANDLE_VALUE && fname == NULL) { zip_error_set(error, ZIP_ER_INVAL, 0); return NULL; } if ((ctx = (_zip_source_win32_read_file_t *)malloc(sizeof(_zip_source_win32_read_file_t))) == NULL) { zip_error_set(error, ZIP_ER_MEMORY, 0); return NULL; } ctx->fname = NULL; if (fname) { if ((ctx->fname = ops->op_strdup(fname)) == NULL) { zip_error_set(error, ZIP_ER_MEMORY, 0); free(ctx); return NULL; } } ctx->ops = ops; ctx->h = h; ctx->start = start; ctx->end = (len < 0 ? 0 : start + (zip_uint64_t)len); ctx->closep = ctx->fname ? 1 : closep; if (st) { memcpy(&ctx->st, st, sizeof(ctx->st)); ctx->st.name = NULL; ctx->st.valid &= ~ZIP_STAT_NAME; } else { zip_stat_init(&ctx->st); } ctx->tmpname = NULL; ctx->hout = INVALID_HANDLE_VALUE; zip_error_init(&ctx->error); ctx->supports = ZIP_SOURCE_SUPPORTS_READABLE | zip_source_make_command_bitmap(ZIP_SOURCE_SUPPORTS, ZIP_SOURCE_TELL, -1); if (ctx->fname) { HANDLE th; th = ops->op_open(ctx); if (th == INVALID_HANDLE_VALUE || GetFileType(th) == FILE_TYPE_DISK) { ctx->supports = ZIP_SOURCE_SUPPORTS_WRITABLE; } if (th != INVALID_HANDLE_VALUE) { CloseHandle(th); } } else if (GetFileType(ctx->h) == FILE_TYPE_DISK) { ctx->supports = ZIP_SOURCE_SUPPORTS_SEEKABLE; } if ((zs = zip_source_function_create(_win32_read_file, ctx, error)) == NULL) { free(ctx->fname); free(ctx); return NULL; } return zs; } static zip_int64_t _win32_read_file(void *state, void *data, zip_uint64_t len, zip_source_cmd_t cmd) { _zip_source_win32_read_file_t *ctx; char *buf; zip_uint64_t n; DWORD i; ctx = (_zip_source_win32_read_file_t *)state; buf = (char *)data; switch (cmd) { case ZIP_SOURCE_BEGIN_WRITE: if (ctx->fname == NULL) { zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0); return -1; } return _win32_create_temp_file(ctx); case ZIP_SOURCE_COMMIT_WRITE: { if (!CloseHandle(ctx->hout)) { ctx->hout = INVALID_HANDLE_VALUE; zip_error_set(&ctx->error, ZIP_ER_WRITE, _zip_win32_error_to_errno(GetLastError())); } ctx->hout = INVALID_HANDLE_VALUE; if (ctx->ops->op_rename_temp(ctx) < 0) { zip_error_set(&ctx->error, ZIP_ER_RENAME, _zip_win32_error_to_errno(GetLastError())); return -1; } free(ctx->tmpname); ctx->tmpname = NULL; return 0; } case ZIP_SOURCE_CLOSE: if (ctx->fname) { CloseHandle(ctx->h); ctx->h = INVALID_HANDLE_VALUE; } return 0; case ZIP_SOURCE_ERROR: return zip_error_to_data(&ctx->error, data, len); case ZIP_SOURCE_FREE: free(ctx->fname); free(ctx->tmpname); if (ctx->closep && ctx->h != INVALID_HANDLE_VALUE) CloseHandle(ctx->h); free(ctx); return 0; case ZIP_SOURCE_OPEN: if (ctx->fname) { if ((ctx->h = ctx->ops->op_open(ctx)) == INVALID_HANDLE_VALUE) { zip_error_set(&ctx->error, ZIP_ER_OPEN, _zip_win32_error_to_errno(GetLastError())); return -1; } } if (ctx->closep && ctx->start > 0) { if (_zip_seek_win32_u(ctx->h, ctx->start, SEEK_SET, &ctx->error) < 0) { return -1; } } ctx->current = ctx->start; return 0; case ZIP_SOURCE_READ: if (ctx->end > 0) { n = ctx->end - ctx->current; if (n > len) { n = len; } } else { n = len; } if (n > SIZE_MAX) n = SIZE_MAX; if (!ctx->closep) { if (_zip_seek_win32_u(ctx->h, ctx->current, SEEK_SET, &ctx->error) < 0) { return -1; } } if (!ReadFile(ctx->h, buf, (DWORD)n, &i, NULL)) { zip_error_set(&ctx->error, ZIP_ER_READ, _zip_win32_error_to_errno(GetLastError())); return -1; } ctx->current += i; return (zip_int64_t)i; case ZIP_SOURCE_REMOVE: if (ctx->ops->op_remove(ctx->fname) < 0) { zip_error_set(&ctx->error, ZIP_ER_REMOVE, _zip_win32_error_to_errno(GetLastError())); return -1; } return 0; case ZIP_SOURCE_ROLLBACK_WRITE: if (ctx->hout) { CloseHandle(ctx->hout); ctx->hout = INVALID_HANDLE_VALUE; } ctx->ops->op_remove(ctx->tmpname); free(ctx->tmpname); ctx->tmpname = NULL; return 0; case ZIP_SOURCE_SEEK: { zip_int64_t new_current; int need_seek; zip_source_args_seek_t *args = ZIP_SOURCE_GET_ARGS(zip_source_args_seek_t, data, len, &ctx->error); if (args == NULL) return -1; need_seek = ctx->closep; switch (args->whence) { case SEEK_SET: new_current = args->offset; break; case SEEK_END: if (ctx->end == 0) { LARGE_INTEGER zero; LARGE_INTEGER new_offset; if (_zip_seek_win32(ctx->h, args->offset, SEEK_END, &ctx->error) < 0) { return -1; } zero.QuadPart = 0; if (!SetFilePointerEx(ctx->h, zero, &new_offset, FILE_CURRENT)) { zip_error_set(&ctx->error, ZIP_ER_SEEK, _zip_win32_error_to_errno(GetLastError())); return -1; } new_current = new_offset.QuadPart; need_seek = 0; } else { new_current = (zip_int64_t)ctx->end + args->offset; } break; case SEEK_CUR: new_current = (zip_int64_t)ctx->current + args->offset; break; default: zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); return -1; } if (new_current < 0 || (zip_uint64_t)new_current < ctx->start || (ctx->end != 0 && (zip_uint64_t)new_current > ctx->end)) { zip_error_set(&ctx->error, ZIP_ER_INVAL, 0); return -1; } ctx->current = (zip_uint64_t)new_current; if (need_seek) { if (_zip_seek_win32_u(ctx->h, ctx->current, SEEK_SET, &ctx->error) < 0) { return -1; } } return 0; } case ZIP_SOURCE_SEEK_WRITE: { zip_source_args_seek_t *args; args = ZIP_SOURCE_GET_ARGS(zip_source_args_seek_t, data, len, &ctx->error); if (args == NULL) { return -1; } if (_zip_seek_win32(ctx->hout, args->offset, args->whence, &ctx->error) < 0) { return -1; } return 0; } case ZIP_SOURCE_STAT: { if (len < sizeof(ctx->st)) return -1; if (ctx->st.valid != 0) memcpy(data, &ctx->st, sizeof(ctx->st)); else { DWORD win32err; zip_stat_t *st; HANDLE h; int success; st = (zip_stat_t *)data; if (ctx->h != INVALID_HANDLE_VALUE) { h = ctx->h; } else { h = ctx->ops->op_open(ctx); if (h == INVALID_HANDLE_VALUE) { win32err = GetLastError(); if (win32err == ERROR_FILE_NOT_FOUND || win32err == ERROR_PATH_NOT_FOUND) { zip_error_set(&ctx->error, ZIP_ER_READ, ENOENT); return -1; } } } success = _zip_stat_win32(h, st, ctx); win32err = GetLastError(); /* We're done with the handle, so close it if we just opened it. */ if (h != ctx->h) { CloseHandle(h); } if (success < 0) { /* TODO: Is this the correct error to return in all cases? */ zip_error_set(&ctx->error, ZIP_ER_READ, _zip_win32_error_to_errno(win32err)); return -1; } } return sizeof(ctx->st); } case ZIP_SOURCE_SUPPORTS: return ctx->supports; case ZIP_SOURCE_TELL: return (zip_int64_t)ctx->current; case ZIP_SOURCE_TELL_WRITE: { LARGE_INTEGER zero; LARGE_INTEGER offset; zero.QuadPart = 0; if (!SetFilePointerEx(ctx->hout, zero, &offset, FILE_CURRENT)) { zip_error_set(&ctx->error, ZIP_ER_TELL, _zip_win32_error_to_errno(GetLastError())); return -1; } return offset.QuadPart; } case ZIP_SOURCE_WRITE: { DWORD ret; if (!WriteFile(ctx->hout, data, (DWORD)len, &ret, NULL) || ret != len) { zip_error_set(&ctx->error, ZIP_ER_WRITE, _zip_win32_error_to_errno(GetLastError())); return -1; } return (zip_int64_t)ret; } default: zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0); return -1; } } static int _win32_create_temp_file(_zip_source_win32_read_file_t *ctx) { zip_uint32_t value; /* Windows has GetTempFileName(), but it closes the file after creation, leaving it open to a horrible race condition. So we reinvent the wheel. */ int i; HANDLE th = INVALID_HANDLE_VALUE; void *temp = NULL; SECURITY_INFORMATION si; SECURITY_ATTRIBUTES sa; PSECURITY_DESCRIPTOR psd = NULL; PSECURITY_ATTRIBUTES psa = NULL; DWORD len; BOOL success; /* Read the DACL from the original file, so we can copy it to the temp file. If there is no original file, or if we can't read the DACL, we'll use the default security descriptor. */ if (ctx->h != INVALID_HANDLE_VALUE && GetFileType(ctx->h) == FILE_TYPE_DISK) { si = DACL_SECURITY_INFORMATION | UNPROTECTED_DACL_SECURITY_INFORMATION; len = 0; success = GetUserObjectSecurity(ctx->h, &si, NULL, len, &len); if (!success && GetLastError() == ERROR_INSUFFICIENT_BUFFER) { if ((psd = (PSECURITY_DESCRIPTOR)malloc(len)) == NULL) { zip_error_set(&ctx->error, ZIP_ER_MEMORY, 0); return -1; } success = GetUserObjectSecurity(ctx->h, &si, psd, len, &len); } if (success) { sa.nLength = sizeof(SECURITY_ATTRIBUTES); sa.bInheritHandle = FALSE; sa.lpSecurityDescriptor = psd; psa = &sa; } } value = GetTickCount(); for (i = 0; i < 1024 && th == INVALID_HANDLE_VALUE; i++) { th = ctx->ops->op_create_temp(ctx, &temp, value + i, psa); if (th == INVALID_HANDLE_VALUE && GetLastError() != ERROR_FILE_EXISTS) break; } if (th == INVALID_HANDLE_VALUE) { free(temp); free(psd); zip_error_set(&ctx->error, ZIP_ER_TMPOPEN, _zip_win32_error_to_errno(GetLastError())); return -1; } free(psd); ctx->hout = th; ctx->tmpname = temp; return 0; } static int _zip_seek_win32_u(HANDLE h, zip_uint64_t offset, int whence, zip_error_t *error) { if (offset > ZIP_INT64_MAX) { zip_error_set(error, ZIP_ER_SEEK, EOVERFLOW); return -1; } return _zip_seek_win32(h, (zip_int64_t)offset, whence, error); } static int _zip_seek_win32(HANDLE h, zip_int64_t offset, int whence, zip_error_t *error) { LARGE_INTEGER li; DWORD method; switch (whence) { case SEEK_SET: method = FILE_BEGIN; break; case SEEK_END: method = FILE_END; break; case SEEK_CUR: method = FILE_CURRENT; break; default: zip_error_set(error, ZIP_ER_SEEK, EINVAL); return -1; } li.QuadPart = (LONGLONG)offset; if (!SetFilePointerEx(h, li, NULL, method)) { zip_error_set(error, ZIP_ER_SEEK, _zip_win32_error_to_errno(GetLastError())); return -1; } return 0; } static int _zip_win32_error_to_errno(DWORD win32err) { /* Note: This list isn't exhaustive, but should cover common cases. */ switch (win32err) { case ERROR_INVALID_PARAMETER: return EINVAL; case ERROR_FILE_NOT_FOUND: return ENOENT; case ERROR_INVALID_HANDLE: return EBADF; case ERROR_ACCESS_DENIED: return EACCES; case ERROR_FILE_EXISTS: return EEXIST; case ERROR_TOO_MANY_OPEN_FILES: return EMFILE; case ERROR_DISK_FULL: return ENOSPC; default: return 0; } } static int _zip_stat_win32(HANDLE h, zip_stat_t *st, _zip_source_win32_read_file_t *ctx) { FILETIME mtimeft; time_t mtime; LARGE_INTEGER size; int regularp; if (!GetFileTime(h, NULL, NULL, &mtimeft)) { zip_error_set(&ctx->error, ZIP_ER_READ, _zip_win32_error_to_errno(GetLastError())); return -1; } if (_zip_filetime_to_time_t(mtimeft, &mtime) < 0) { zip_error_set(&ctx->error, ZIP_ER_READ, ERANGE); return -1; } regularp = 0; if (GetFileType(h) == FILE_TYPE_DISK) { regularp = 1; } if (!GetFileSizeEx(h, &size)) { zip_error_set(&ctx->error, ZIP_ER_READ, _zip_win32_error_to_errno(GetLastError())); return -1; } zip_stat_init(st); st->mtime = mtime; st->valid |= ZIP_STAT_MTIME; if (ctx->end != 0) { st->size = ctx->end - ctx->start; st->valid |= ZIP_STAT_SIZE; } else if (regularp) { st->size = (zip_uint64_t)size.QuadPart; st->valid |= ZIP_STAT_SIZE; } return 0; } static int _zip_filetime_to_time_t(FILETIME ft, time_t *t) { /* Inspired by http://stackoverflow.com/questions/6161776/convert-windows-filetime-to-second-in-unix-linux */ const zip_int64_t WINDOWS_TICK = 10000000LL; const zip_int64_t SEC_TO_UNIX_EPOCH = 11644473600LL; ULARGE_INTEGER li; zip_int64_t secs; time_t temp; li.LowPart = ft.dwLowDateTime; li.HighPart = ft.dwHighDateTime; secs = (li.QuadPart / WINDOWS_TICK - SEC_TO_UNIX_EPOCH); temp = (time_t)secs; if (secs != (zip_int64_t)temp) return -1; *t = temp; return 0; } #n378'>378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906