From 4dacedd9ccdbdc6a6e62d9fb86e9b2ea903a3629 Mon Sep 17 00:00:00 2001 From: Mounir IDRASSI Date: Thu, 15 Sep 2016 10:04:05 +0200 Subject: Windows: Replace XZip/XUnzip library with zlib and libzip and include the sources of these library into VeraCrypt source tree. --- src/Common/libzip/zip_source_window.c | 253 ++++++++++++++++++++++++++++++++++ 1 file changed, 253 insertions(+) create mode 100644 src/Common/libzip/zip_source_window.c (limited to 'src/Common/libzip/zip_source_window.c') diff --git a/src/Common/libzip/zip_source_window.c b/src/Common/libzip/zip_source_window.c new file mode 100644 index 00000000..f02d048c --- /dev/null +++ b/src/Common/libzip/zip_source_window.c @@ -0,0 +1,253 @@ +/* + zip_source_window.c -- return part of lower source + Copyright (C) 2012-2014 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 "zipint.h" + +struct window { + zip_uint64_t start; + zip_uint64_t end; + zip_uint64_t offset; + zip_stat_t stat; + zip_error_t error; + zip_int64_t supports; + bool needs_seek; +}; + +static zip_int64_t window_read(zip_source_t *, void *, void *, zip_uint64_t, zip_source_cmd_t); + + +zip_source_t * +zip_source_window(zip_t *za, zip_source_t *src, zip_uint64_t start, zip_uint64_t len) +{ + return _zip_source_window_new(src, start, len, NULL, &za->error); +} + + +zip_source_t * +_zip_source_window_new(zip_source_t *src, zip_uint64_t start, zip_uint64_t length, zip_stat_t *st, zip_error_t *error) +{ + struct window *ctx; + + if (src == NULL || start + length < start) { + zip_error_set(error, ZIP_ER_INVAL, 0); + return NULL; + } + + if ((ctx=(struct window *)malloc(sizeof(*ctx))) == NULL) { + zip_error_set(error, ZIP_ER_MEMORY, 0); + return NULL; + } + + ctx->start = start; + ctx->end = start + length; + zip_stat_init(&ctx->stat); + zip_error_init(&ctx->error); + ctx->supports = (zip_source_supports(src) & ZIP_SOURCE_SUPPORTS_SEEKABLE) | (zip_source_make_command_bitmap(ZIP_SOURCE_SUPPORTS, ZIP_SOURCE_TELL, -1)); + ctx->needs_seek = (ctx->supports & ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_SEEK)) ? true : false; + + if (st) { + if (_zip_stat_merge(&ctx->stat, st, error) < 0) { + free(ctx); + return NULL; + } + } + + return zip_source_layered_create(src, window_read, ctx, error); +} + + +int +_zip_source_set_source_archive(zip_source_t *src, zip_t *za) +{ + src->source_archive = za; + return _zip_register_source(za, src); +} + + +/* called by zip_discard to avoid operating on file from closed archive */ +void +_zip_source_invalidate(zip_source_t *src) +{ + src->source_closed = 1; + + if (zip_error_code_zip(&src->error) == ZIP_ER_OK) { + zip_error_set(&src->error, ZIP_ER_ZIPCLOSED, 0); + } +} + + +static zip_int64_t +window_read(zip_source_t *src, void *_ctx, void *data, zip_uint64_t len, zip_source_cmd_t cmd) +{ + struct window *ctx; + zip_int64_t ret; + zip_uint64_t n, i; + char b[8192]; + + ctx = (struct window *)_ctx; + + switch (cmd) { + case ZIP_SOURCE_CLOSE: + return 0; + + case ZIP_SOURCE_ERROR: + return zip_error_to_data(&ctx->error, data, len); + + case ZIP_SOURCE_FREE: + free(ctx); + return 0; + + case ZIP_SOURCE_OPEN: + if (!ctx->needs_seek) { + for (n=0; nstart; n+=(zip_uint64_t)ret) { + i = (ctx->start-n > sizeof(b) ? sizeof(b) : ctx->start-n); + if ((ret=zip_source_read(src, b, i)) < 0) { + _zip_error_set_from_source(&ctx->error, src); + return -1; + } + if (ret==0) { + zip_error_set(&ctx->error, ZIP_ER_EOF, 0); + return -1; + } + } + + } + ctx->offset = ctx->start; + return 0; + + case ZIP_SOURCE_READ: + if (len > ctx->end - ctx->offset) + len = ctx->end - ctx->offset; + + if (len == 0) + return 0; + + if (ctx->needs_seek) { + if (zip_source_seek(src, (zip_int64_t)ctx->offset, SEEK_SET) < 0) { + _zip_error_set_from_source(&ctx->error, src); + return -1; + } + } + + if ((ret=zip_source_read(src, data, len)) < 0) { + zip_error_set(&ctx->error, ZIP_ER_EOF, 0); + return -1; + } + + ctx->offset += (zip_uint64_t)ret; + + if (ret == 0) { + if (ctx->offset < ctx->end) { + zip_error_set(&ctx->error, ZIP_ER_EOF, 0); + return -1; + } + } + return ret; + + case ZIP_SOURCE_SEEK: + { + zip_int64_t new_offset = zip_source_seek_compute_offset(ctx->offset - ctx->start, ctx->end - ctx->start, data, len, &ctx->error); + + if (new_offset < 0) { + return -1; + } + + ctx->offset = (zip_uint64_t)new_offset + ctx->start; + return 0; + } + + case ZIP_SOURCE_STAT: + { + zip_stat_t *st; + + st = (zip_stat_t *)data; + + if (_zip_stat_merge(st, &ctx->stat, &ctx->error) < 0) { + return -1; + } + return 0; + } + + case ZIP_SOURCE_SUPPORTS: + return ctx->supports; + + case ZIP_SOURCE_TELL: + return (zip_int64_t)(ctx->offset - ctx->start); + + default: + zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0); + return -1; + } +} + + +void +_zip_deregister_source(zip_t *za, zip_source_t *src) +{ + unsigned int i; + + for (i=0; inopen_source; i++) { + if (za->open_source[i] == src) { + za->open_source[i] = za->open_source[za->nopen_source-1]; + za->nopen_source--; + break; + } + } +} + + +int +_zip_register_source(zip_t *za, zip_source_t *src) +{ + zip_source_t **open_source; + + if (za->nopen_source+1 >= za->nopen_source_alloc) { + unsigned int n; + n = za->nopen_source_alloc + 10; + open_source = (zip_source_t **)realloc(za->open_source, n*sizeof(zip_source_t *)); + if (open_source == NULL) { + zip_error_set(&za->error, ZIP_ER_MEMORY, 0); + return -1; + } + za->nopen_source_alloc = n; + za->open_source = open_source; + } + + za->open_source[za->nopen_source++] = src; + + return 0; +} -- cgit v1.2.3