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verify.c
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verify.c
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/*
* verify.c
*
* Verify WIM files.
*/
/*
* Copyright (C) 2012, 2013, 2014 Eric Biggers
*
* This file is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at your option) any
* later version.
*
* This file is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this file; if not, see https://www.gnu.org/licenses/.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "wimlib/blob_table.h"
#include "wimlib/dentry.h"
#include "wimlib/error.h"
#include "wimlib/metadata.h"
#include "wimlib/progress.h"
#include "wimlib/security.h"
static int
append_blob_to_list(struct blob_descriptor *blob, void *_list)
{
list_add(&blob->extraction_list, (struct list_head *)_list);
return 0;
}
struct verify_blob_list_ctx {
wimlib_progress_func_t progfunc;
void *progctx;
union wimlib_progress_info *progress;
u64 next_progress;
};
static int
verify_continue_blob(const struct blob_descriptor *blob, u64 offset,
const void *chunk, size_t size, void *_ctx)
{
struct verify_blob_list_ctx *ctx = _ctx;
union wimlib_progress_info *progress = ctx->progress;
if (offset + size == blob->size)
progress->verify_streams.completed_streams++;
progress->verify_streams.completed_bytes += size;
if (progress->verify_streams.completed_bytes >= ctx->next_progress) {
int ret = call_progress(ctx->progfunc,
WIMLIB_PROGRESS_MSG_VERIFY_STREAMS,
progress, ctx->progctx);
if (ret)
return ret;
set_next_progress(progress->verify_streams.completed_bytes,
progress->verify_streams.total_bytes,
&ctx->next_progress);
}
return 0;
}
static int
verify_file_data_present(struct wim_image_metadata *imd,
struct blob_table *blob_table)
{
struct wim_inode *inode;
int ret;
image_for_each_inode(inode, imd) {
ret = inode_resolve_streams(inode, blob_table, false);
if (ret)
return ret;
}
return 0;
}
/* API function documented in wimlib.h */
WIMLIBAPI int
wimlib_verify_wim(WIMStruct *wim, int verify_flags)
{
int ret;
LIST_HEAD(blob_list);
union wimlib_progress_info progress;
struct verify_blob_list_ctx ctx;
struct blob_descriptor *blob;
struct read_blob_callbacks cbs = {
.continue_blob = verify_continue_blob,
.ctx = &ctx,
};
/* Check parameters */
if (!wim)
return WIMLIB_ERR_INVALID_PARAM;
if (verify_flags)
return WIMLIB_ERR_INVALID_PARAM;
/* Verify the images */
if (wim_has_metadata(wim)) {
memset(&progress, 0, sizeof(progress));
progress.verify_image.wimfile = wim->filename;
progress.verify_image.total_images = wim->hdr.image_count;
for (int i = 1; i <= wim->hdr.image_count; i++) {
progress.verify_image.current_image = i;
ret = call_progress(wim->progfunc, WIMLIB_PROGRESS_MSG_BEGIN_VERIFY_IMAGE,
&progress, wim->progctx);
if (ret)
return ret;
ret = select_wim_image(wim, i);
if (ret)
return ret;
ret = verify_file_data_present(wim_get_current_image_metadata(wim),
wim->blob_table);
if (ret)
return ret;
ret = call_progress(wim->progfunc, WIMLIB_PROGRESS_MSG_END_VERIFY_IMAGE,
&progress, wim->progctx);
if (ret)
return ret;
}
} else {
WARNING("\"%"TS"\" does not contain image metadata. Skipping image verification.",
wim->filename);
}
/* Verify the blobs: SHA-1 message digests must match */
for_blob_in_table(wim->blob_table, append_blob_to_list, &blob_list);
memset(&progress, 0, sizeof(progress));
progress.verify_streams.wimfile = wim->filename;
list_for_each_entry(blob, &blob_list, extraction_list) {
progress.verify_streams.total_streams++;
progress.verify_streams.total_bytes += blob->size;
}
ctx.progfunc = wim->progfunc;
ctx.progctx = wim->progctx;
ctx.progress = &progress;
ctx.next_progress = 0;
ret = call_progress(ctx.progfunc, WIMLIB_PROGRESS_MSG_VERIFY_STREAMS,
ctx.progress, ctx.progctx);
if (ret)
return ret;
return read_blob_list(&blob_list,
offsetof(struct blob_descriptor, extraction_list),
&cbs, VERIFY_BLOB_HASHES);
}