597 lines
15 KiB
C
597 lines
15 KiB
C
/*
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zip_source_win32file.c -- create data source from HANDLE (Win32)
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Copyright (C) 1999-2016 Dieter Baron and Thomas Klausner
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This file is part of libzip, a library to manipulate ZIP archives.
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The authors can be contacted at <libzip@nih.at>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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3. The names of the authors may not be used to endorse or promote
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products derived from this software without specific prior
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written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
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OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <aclapi.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include "zipint.h"
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#include "zipwin32.h"
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static zip_int64_t _win32_read_file(void *state, void *data, zip_uint64_t len, zip_source_cmd_t cmd);
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static int _win32_create_temp_file(_zip_source_win32_read_file_t *ctx);
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static int _zip_filetime_to_time_t(FILETIME ft, time_t *t);
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static int _zip_seek_win32_u(void *h, zip_uint64_t offset, int whence, zip_error_t *error);
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static int _zip_seek_win32(void *h, zip_int64_t offset, int whence, zip_error_t *error);
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static int _zip_win32_error_to_errno(unsigned long win32err);
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static int _zip_stat_win32(void *h, zip_stat_t *st, _zip_source_win32_read_file_t *ctx);
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ZIP_EXTERN zip_source_t *
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zip_source_win32handle(zip_t *za, HANDLE h, zip_uint64_t start, zip_int64_t len) {
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if (za == NULL)
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return NULL;
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return zip_source_win32handle_create(h, start, len, &za->error);
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}
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ZIP_EXTERN zip_source_t *
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zip_source_win32handle_create(HANDLE h, zip_uint64_t start, zip_int64_t length, zip_error_t *error) {
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if (h == INVALID_HANDLE_VALUE || length < -1) {
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zip_error_set(error, ZIP_ER_INVAL, 0);
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return NULL;
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}
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return _zip_source_win32_handle_or_name(NULL, h, start, length, 1, NULL, NULL, error);
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}
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zip_source_t *
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_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) {
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_zip_source_win32_read_file_t *ctx;
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zip_source_t *zs;
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if (h == INVALID_HANDLE_VALUE && fname == NULL) {
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zip_error_set(error, ZIP_ER_INVAL, 0);
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return NULL;
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}
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if ((ctx = (_zip_source_win32_read_file_t *)malloc(sizeof(_zip_source_win32_read_file_t))) == NULL) {
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zip_error_set(error, ZIP_ER_MEMORY, 0);
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return NULL;
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}
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ctx->fname = NULL;
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if (fname) {
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if ((ctx->fname = ops->op_strdup(fname)) == NULL) {
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zip_error_set(error, ZIP_ER_MEMORY, 0);
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free(ctx);
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return NULL;
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}
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}
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ctx->ops = ops;
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ctx->h = h;
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ctx->start = start;
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ctx->end = (len < 0 ? 0 : start + (zip_uint64_t)len);
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ctx->closep = ctx->fname ? 1 : closep;
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if (st) {
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memcpy(&ctx->st, st, sizeof(ctx->st));
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ctx->st.name = NULL;
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ctx->st.valid &= ~ZIP_STAT_NAME;
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}
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else {
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zip_stat_init(&ctx->st);
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}
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ctx->tmpname = NULL;
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ctx->hout = INVALID_HANDLE_VALUE;
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zip_error_init(&ctx->error);
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ctx->supports = ZIP_SOURCE_SUPPORTS_READABLE | zip_source_make_command_bitmap(ZIP_SOURCE_SUPPORTS, ZIP_SOURCE_TELL, -1);
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if (ctx->fname) {
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HANDLE th;
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th = ops->op_open(ctx);
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if (th == INVALID_HANDLE_VALUE || GetFileType(th) == FILE_TYPE_DISK) {
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ctx->supports = ZIP_SOURCE_SUPPORTS_WRITABLE;
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}
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if (th != INVALID_HANDLE_VALUE) {
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CloseHandle(th);
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}
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}
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else if (GetFileType(ctx->h) == FILE_TYPE_DISK) {
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ctx->supports = ZIP_SOURCE_SUPPORTS_SEEKABLE;
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}
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if ((zs = zip_source_function_create(_win32_read_file, ctx, error)) == NULL) {
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free(ctx->fname);
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free(ctx);
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return NULL;
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}
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return zs;
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}
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static zip_int64_t
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_win32_read_file(void *state, void *data, zip_uint64_t len, zip_source_cmd_t cmd) {
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_zip_source_win32_read_file_t *ctx;
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char *buf;
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zip_uint64_t n;
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DWORD i;
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ctx = (_zip_source_win32_read_file_t *)state;
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buf = (char *)data;
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switch (cmd) {
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case ZIP_SOURCE_BEGIN_WRITE:
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if (ctx->fname == NULL) {
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zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0);
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return -1;
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}
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return _win32_create_temp_file(ctx);
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case ZIP_SOURCE_COMMIT_WRITE: {
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if (!CloseHandle(ctx->hout)) {
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ctx->hout = INVALID_HANDLE_VALUE;
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zip_error_set(&ctx->error, ZIP_ER_WRITE, _zip_win32_error_to_errno(GetLastError()));
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}
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ctx->hout = INVALID_HANDLE_VALUE;
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if (ctx->ops->op_rename_temp(ctx) < 0) {
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zip_error_set(&ctx->error, ZIP_ER_RENAME, _zip_win32_error_to_errno(GetLastError()));
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return -1;
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}
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free(ctx->tmpname);
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ctx->tmpname = NULL;
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return 0;
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}
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case ZIP_SOURCE_CLOSE:
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if (ctx->fname) {
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CloseHandle(ctx->h);
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ctx->h = INVALID_HANDLE_VALUE;
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}
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return 0;
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case ZIP_SOURCE_ERROR:
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return zip_error_to_data(&ctx->error, data, len);
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case ZIP_SOURCE_FREE:
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free(ctx->fname);
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free(ctx->tmpname);
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if (ctx->closep && ctx->h != INVALID_HANDLE_VALUE)
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CloseHandle(ctx->h);
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free(ctx);
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return 0;
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case ZIP_SOURCE_OPEN:
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if (ctx->fname) {
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if ((ctx->h = ctx->ops->op_open(ctx)) == INVALID_HANDLE_VALUE) {
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zip_error_set(&ctx->error, ZIP_ER_OPEN, _zip_win32_error_to_errno(GetLastError()));
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return -1;
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}
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}
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if (ctx->closep && ctx->start > 0) {
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if (_zip_seek_win32_u(ctx->h, ctx->start, SEEK_SET, &ctx->error) < 0) {
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return -1;
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}
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}
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ctx->current = ctx->start;
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return 0;
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case ZIP_SOURCE_READ:
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if (ctx->end > 0) {
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n = ctx->end - ctx->current;
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if (n > len) {
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n = len;
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}
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}
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else {
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n = len;
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}
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if (n > SIZE_MAX)
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n = SIZE_MAX;
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if (!ctx->closep) {
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if (_zip_seek_win32_u(ctx->h, ctx->current, SEEK_SET, &ctx->error) < 0) {
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return -1;
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}
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}
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if (!ReadFile(ctx->h, buf, (DWORD)n, &i, NULL)) {
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zip_error_set(&ctx->error, ZIP_ER_READ, _zip_win32_error_to_errno(GetLastError()));
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return -1;
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}
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ctx->current += i;
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return (zip_int64_t)i;
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case ZIP_SOURCE_REMOVE:
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if (ctx->ops->op_remove(ctx->fname) < 0) {
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zip_error_set(&ctx->error, ZIP_ER_REMOVE, _zip_win32_error_to_errno(GetLastError()));
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return -1;
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}
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return 0;
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case ZIP_SOURCE_ROLLBACK_WRITE:
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if (ctx->hout) {
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CloseHandle(ctx->hout);
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ctx->hout = INVALID_HANDLE_VALUE;
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}
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ctx->ops->op_remove(ctx->tmpname);
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free(ctx->tmpname);
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ctx->tmpname = NULL;
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return 0;
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case ZIP_SOURCE_SEEK: {
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zip_int64_t new_current;
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int need_seek;
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zip_source_args_seek_t *args = ZIP_SOURCE_GET_ARGS(zip_source_args_seek_t, data, len, &ctx->error);
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if (args == NULL)
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return -1;
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need_seek = ctx->closep;
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switch (args->whence) {
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case SEEK_SET:
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new_current = args->offset;
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break;
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case SEEK_END:
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if (ctx->end == 0) {
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LARGE_INTEGER zero;
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LARGE_INTEGER new_offset;
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if (_zip_seek_win32(ctx->h, args->offset, SEEK_END, &ctx->error) < 0) {
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return -1;
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}
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zero.QuadPart = 0;
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if (!SetFilePointerEx(ctx->h, zero, &new_offset, FILE_CURRENT)) {
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zip_error_set(&ctx->error, ZIP_ER_SEEK, _zip_win32_error_to_errno(GetLastError()));
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return -1;
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}
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new_current = new_offset.QuadPart;
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need_seek = 0;
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}
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else {
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new_current = (zip_int64_t)ctx->end + args->offset;
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}
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break;
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case SEEK_CUR:
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new_current = (zip_int64_t)ctx->current + args->offset;
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break;
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default:
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zip_error_set(&ctx->error, ZIP_ER_INVAL, 0);
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return -1;
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}
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if (new_current < 0 || (zip_uint64_t)new_current < ctx->start || (ctx->end != 0 && (zip_uint64_t)new_current > ctx->end)) {
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zip_error_set(&ctx->error, ZIP_ER_INVAL, 0);
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return -1;
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}
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ctx->current = (zip_uint64_t)new_current;
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if (need_seek) {
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if (_zip_seek_win32_u(ctx->h, ctx->current, SEEK_SET, &ctx->error) < 0) {
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return -1;
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}
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}
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return 0;
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}
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case ZIP_SOURCE_SEEK_WRITE: {
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zip_source_args_seek_t *args;
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args = ZIP_SOURCE_GET_ARGS(zip_source_args_seek_t, data, len, &ctx->error);
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if (args == NULL) {
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return -1;
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}
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if (_zip_seek_win32(ctx->hout, args->offset, args->whence, &ctx->error) < 0) {
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return -1;
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}
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return 0;
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}
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case ZIP_SOURCE_STAT: {
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if (len < sizeof(ctx->st))
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return -1;
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if (ctx->st.valid != 0)
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memcpy(data, &ctx->st, sizeof(ctx->st));
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else {
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DWORD win32err;
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zip_stat_t *st;
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HANDLE h;
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int success;
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st = (zip_stat_t *)data;
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if (ctx->h != INVALID_HANDLE_VALUE) {
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h = ctx->h;
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}
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else {
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h = ctx->ops->op_open(ctx);
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if (h == INVALID_HANDLE_VALUE) {
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win32err = GetLastError();
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if (win32err == ERROR_FILE_NOT_FOUND || win32err == ERROR_PATH_NOT_FOUND) {
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zip_error_set(&ctx->error, ZIP_ER_READ, ENOENT);
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return -1;
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}
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}
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}
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success = _zip_stat_win32(h, st, ctx);
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win32err = GetLastError();
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/* We're done with the handle, so close it if we just opened it. */
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if (h != ctx->h) {
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CloseHandle(h);
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}
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if (success < 0) {
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/* TODO: Is this the correct error to return in all cases? */
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zip_error_set(&ctx->error, ZIP_ER_READ, _zip_win32_error_to_errno(win32err));
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return -1;
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}
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}
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return sizeof(ctx->st);
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}
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case ZIP_SOURCE_SUPPORTS:
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return ctx->supports;
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case ZIP_SOURCE_TELL:
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return (zip_int64_t)ctx->current;
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case ZIP_SOURCE_TELL_WRITE: {
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LARGE_INTEGER zero;
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LARGE_INTEGER offset;
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zero.QuadPart = 0;
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if (!SetFilePointerEx(ctx->hout, zero, &offset, FILE_CURRENT)) {
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zip_error_set(&ctx->error, ZIP_ER_TELL, _zip_win32_error_to_errno(GetLastError()));
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return -1;
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}
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return offset.QuadPart;
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}
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case ZIP_SOURCE_WRITE: {
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DWORD ret;
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if (!WriteFile(ctx->hout, data, (DWORD)len, &ret, NULL) || ret != len) {
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zip_error_set(&ctx->error, ZIP_ER_WRITE, _zip_win32_error_to_errno(GetLastError()));
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return -1;
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}
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return (zip_int64_t)ret;
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}
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default:
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zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0);
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return -1;
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}
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}
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static int
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_win32_create_temp_file(_zip_source_win32_read_file_t *ctx) {
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zip_uint32_t value;
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/*
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Windows has GetTempFileName(), but it closes the file after
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creation, leaving it open to a horrible race condition. So
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we reinvent the wheel.
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*/
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int i;
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HANDLE th = INVALID_HANDLE_VALUE;
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void *temp = NULL;
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PSECURITY_DESCRIPTOR psd = NULL;
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PSECURITY_ATTRIBUTES psa = NULL;
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SECURITY_ATTRIBUTES sa;
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SECURITY_INFORMATION si;
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DWORD success;
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PACL dacl = NULL;
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/*
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Read the DACL from the original file, so we can copy it to the temp file.
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If there is no original file, or if we can't read the DACL, we'll use the
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default security descriptor.
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*/
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if (ctx->h != INVALID_HANDLE_VALUE && GetFileType(ctx->h) == FILE_TYPE_DISK) {
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si = DACL_SECURITY_INFORMATION | UNPROTECTED_DACL_SECURITY_INFORMATION;
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success = GetSecurityInfo(ctx->h, SE_FILE_OBJECT, si, NULL, NULL, &dacl, NULL, &psd);
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if (success == ERROR_SUCCESS) {
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sa.nLength = sizeof(SECURITY_ATTRIBUTES);
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sa.bInheritHandle = FALSE;
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sa.lpSecurityDescriptor = psd;
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psa = &sa;
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}
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}
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#ifndef MS_UWP
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value = GetTickCount();
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#else
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value = (zip_uint32_t)GetTickCount64();
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#endif
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for (i = 0; i < 1024 && th == INVALID_HANDLE_VALUE; i++) {
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th = ctx->ops->op_create_temp(ctx, &temp, value + i, psa);
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if (th == INVALID_HANDLE_VALUE && GetLastError() != ERROR_FILE_EXISTS)
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break;
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}
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if (th == INVALID_HANDLE_VALUE) {
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free(temp);
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LocalFree(psd);
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zip_error_set(&ctx->error, ZIP_ER_TMPOPEN, _zip_win32_error_to_errno(GetLastError()));
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return -1;
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}
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LocalFree(psd);
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ctx->hout = th;
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ctx->tmpname = temp;
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return 0;
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}
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static int
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_zip_seek_win32_u(HANDLE h, zip_uint64_t offset, int whence, zip_error_t *error) {
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if (offset > ZIP_INT64_MAX) {
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zip_error_set(error, ZIP_ER_SEEK, EOVERFLOW);
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return -1;
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}
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return _zip_seek_win32(h, (zip_int64_t)offset, whence, error);
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}
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static int
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_zip_seek_win32(HANDLE h, zip_int64_t offset, int whence, zip_error_t *error) {
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LARGE_INTEGER li;
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DWORD method;
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switch (whence) {
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case SEEK_SET:
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method = FILE_BEGIN;
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break;
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case SEEK_END:
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method = FILE_END;
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break;
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case SEEK_CUR:
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method = FILE_CURRENT;
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break;
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default:
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zip_error_set(error, ZIP_ER_SEEK, EINVAL);
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return -1;
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}
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li.QuadPart = (LONGLONG)offset;
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if (!SetFilePointerEx(h, li, NULL, method)) {
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zip_error_set(error, ZIP_ER_SEEK, _zip_win32_error_to_errno(GetLastError()));
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return -1;
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}
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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;
|
|
}
|