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Member "src/Common/libzip/zip_source_win32a.c" (10 Oct 2018, 4283 Bytes) of package /windows/misc/VeraCrypt_1.23-Hotfix-2_Source.zip:


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    1 /*
    2   zip_source_win32a.c -- create data source from Windows file (ANSI)
    3   Copyright (C) 1999-2017 Dieter Baron and Thomas Klausner
    4 
    5   This file is part of libzip, a library to manipulate ZIP archives.
    6   The authors can be contacted at <libzip@nih.at>
    7 
    8   Redistribution and use in source and binary forms, with or without
    9   modification, are permitted provided that the following conditions
   10   are met:
   11   1. Redistributions of source code must retain the above copyright
   12   notice, this list of conditions and the following disclaimer.
   13   2. Redistributions in binary form must reproduce the above copyright
   14   notice, this list of conditions and the following disclaimer in
   15   the documentation and/or other materials provided with the
   16   distribution.
   17   3. The names of the authors may not be used to endorse or promote
   18   products derived from this software without specific prior
   19   written permission.
   20 
   21   THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
   22   OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   23   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
   25   DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
   27   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   28   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
   29   IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   30   OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
   31   IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32 */
   33 
   34 /* 0x0501 => Windows XP; needs to be at least this value because of GetFileSizeEx */
   35 #if !defined(MS_UWP) && !defined(_WIN32_WINNT)
   36 #define _WIN32_WINNT 0x0501
   37 #endif
   38 #include <windows.h>
   39 
   40 #include <stdio.h>
   41 #include <stdlib.h>
   42 
   43 #include "zipint.h"
   44 #include "zipwin32.h"
   45 
   46 static void *_win32_strdup_a(const void *str);
   47 static HANDLE _win32_open_a(_zip_source_win32_read_file_t *ctx);
   48 static HANDLE _win32_create_temp_a(_zip_source_win32_read_file_t *ctx, void **temp, zip_uint32_t value, PSECURITY_ATTRIBUTES sa);
   49 static int _win32_rename_temp_a(_zip_source_win32_read_file_t *ctx);
   50 static int _win32_remove_a(const void *fname);
   51 
   52 // clang-format off
   53 static _zip_source_win32_file_ops_t win32_ops_a = {
   54     _win32_strdup_a,
   55     _win32_open_a,
   56     _win32_create_temp_a,
   57     _win32_rename_temp_a,
   58     _win32_remove_a
   59 };
   60 // clang-format on
   61 
   62 ZIP_EXTERN zip_source_t *
   63 zip_source_win32a(zip_t *za, const char *fname, zip_uint64_t start, zip_int64_t len) {
   64     if (za == NULL)
   65     return NULL;
   66 
   67     return zip_source_win32a_create(fname, start, len, &za->error);
   68 }
   69 
   70 
   71 ZIP_EXTERN zip_source_t *
   72 zip_source_win32a_create(const char *fname, zip_uint64_t start, zip_int64_t length, zip_error_t *error) {
   73     if (fname == NULL || length < -1) {
   74     zip_error_set(error, ZIP_ER_INVAL, 0);
   75     return NULL;
   76     }
   77 
   78     return _zip_source_win32_handle_or_name(fname, INVALID_HANDLE_VALUE, start, length, 1, NULL, &win32_ops_a, error);
   79 }
   80 
   81 
   82 static void *
   83 _win32_strdup_a(const void *str) {
   84     return strdup((const char *)str);
   85 }
   86 
   87 
   88 static HANDLE
   89 _win32_open_a(_zip_source_win32_read_file_t *ctx) {
   90     return CreateFileA(ctx->fname, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
   91 }
   92 
   93 
   94 static HANDLE
   95 _win32_create_temp_a(_zip_source_win32_read_file_t *ctx, void **temp, zip_uint32_t value, PSECURITY_ATTRIBUTES sa) {
   96     size_t len;
   97 
   98     len = strlen((const char *)ctx->fname) + 10;
   99     if (*temp == NULL) {
  100     if ((*temp = malloc(sizeof(char) * len)) == NULL) {
  101         zip_error_set(&ctx->error, ZIP_ER_MEMORY, 0);
  102         return INVALID_HANDLE_VALUE;
  103     }
  104     }
  105     if (sprintf((char *)*temp, "%s.%08x", (const char *)ctx->fname, value) != len - 1) {
  106     return INVALID_HANDLE_VALUE;
  107     }
  108 
  109     return CreateFileA((const char *)*temp, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, sa, CREATE_NEW, FILE_ATTRIBUTE_NORMAL | FILE_ATTRIBUTE_TEMPORARY, NULL);
  110 }
  111 
  112 
  113 static int
  114 _win32_rename_temp_a(_zip_source_win32_read_file_t *ctx) {
  115     if (!MoveFileExA(ctx->tmpname, ctx->fname, MOVEFILE_REPLACE_EXISTING))
  116     return -1;
  117     return 0;
  118 }
  119 
  120 
  121 static int
  122 _win32_remove_a(const void *fname) {
  123     DeleteFileA((const char *)fname);
  124     return 0;
  125 }