/*
* check_wim_integrity():
*
* Verifies the integrity of the WIM by making sure the SHA1 message digests of
* ~10 MiB chunks of the WIM match up with the values given in the integrity
* table.
*
* @wim:
* The WIM, opened for reading.
*
* Returns:
* > 0 (WIMLIB_ERR_INVALID_INTEGRITY_TABLE, WIMLIB_ERR_READ,
* WIMLIB_ERR_UNEXPECTED_END_OF_FILE) on error
* 0 (WIM_INTEGRITY_OK) if the integrity was checked successfully and there
* were no inconsistencies.
* -1 (WIM_INTEGRITY_NOT_OK) if the WIM failed the integrity check.
* -2 (WIM_INTEGRITY_NONEXISTENT) if the WIM contains no integrity
* information.
*/
int
check_wim_integrity(WIMStruct *wim)
{
int ret;
u64 bytes_to_check;
struct integrity_table *table;
u64 end_lookup_table_offset;
if (!wim_has_integrity_table(wim)) {
DEBUG("No integrity information.");
return WIM_INTEGRITY_NONEXISTENT;
}
end_lookup_table_offset = wim->hdr.lookup_table_reshdr.offset_in_wim +
wim->hdr.lookup_table_reshdr.size_in_wim;
if (end_lookup_table_offset < WIM_HEADER_DISK_SIZE) {
ERROR("WIM lookup table ends before WIM header ends!");
return WIMLIB_ERR_INVALID_INTEGRITY_TABLE;
}
bytes_to_check = end_lookup_table_offset - WIM_HEADER_DISK_SIZE;
ret = read_integrity_table(wim, bytes_to_check, &table);
if (ret)
return ret;
ret = verify_integrity(&wim->in_fd, wim->filename, table,
bytes_to_check, wim->progfunc, wim->progctx);
FREE(table);
return ret;
}
int main() {
if (verify_integrity())
return go();
else
return 2;
}
