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/********************************************************/
/* ntapi: Native API core library */
/* Copyright (C) 2013,2014,2015 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
/********************************************************/
#include <ntapi/ntapi.h>
#include <ntapi/nt_file.h>
#include <ntapi/nt_fsctl.h>
#include <ntapi/nt_mount.h>
#include <ntapi/nt_istat.h>
#include "ntapi_impl.h"
int32_t __stdcall __ntapi_tt_istat(
__in void * hfile,
__in void * hroot __optional,
__in nt_unicode_string * path,
__out nt_istat * istat,
__out uintptr_t * buffer,
__in uint32_t buffer_size,
__in uint32_t open_options,
__in uint32_t flags)
{
int32_t status;
nt_oa oa;
nt_iosb iosb;
nt_unicode_string * sdev;
uint32_t hash;
wchar16_t * wch;
wchar16_t * wch_mark;
/* validaton */
if (!hfile && !path)
return NT_STATUS_INVALID_HANDLE;
/* hfile */
if (!hfile) {
/* oa */
oa.len = sizeof(nt_oa);
oa.root_dir = hroot;
oa.obj_name = path;
oa.obj_attr = 0;
oa.sec_desc = 0;
oa.sec_qos = 0;
/* open file/folder */
status = __ntapi->zw_open_file(
&hfile,
NT_SEC_SYNCHRONIZE | NT_FILE_READ_ATTRIBUTES | NT_FILE_READ_ACCESS,
&oa,
&iosb,
NT_FILE_SHARE_READ | NT_FILE_SHARE_WRITE,
open_options | NT_FILE_SYNCHRONOUS_IO_ALERT);
if (status != NT_STATUS_SUCCESS)
return status;
istat->flags_out = NT_STAT_NEW_HANDLE;
}
istat->hfile = hfile;
istat->flags_in = flags;
/* file index number */
status = __ntapi->zw_query_information_file(
hfile,
&iosb,
&istat->fii,
sizeof(istat->fii),
NT_FILE_INTERNAL_INFORMATION);
if (status != NT_STATUS_SUCCESS)
return status;
/* attributes & reparse tag information */
status = __ntapi->zw_query_information_file(
hfile,
&iosb,
&istat->ftagi,
sizeof(istat->ftagi),
NT_FILE_ATTRIBUTE_TAG_INFORMATION);
if (status != NT_STATUS_SUCCESS)
return status;
/* TODO: consolidate with statfs */
/* system-unique device name */
iosb.info = 0;
status = __ntapi->zw_query_object(
hfile,
NT_OBJECT_NAME_INFORMATION,
buffer,
buffer_size,
(uint32_t *)&iosb.info);
if (status != NT_STATUS_SUCCESS)
return status;
sdev = (nt_unicode_string *)buffer;
if (sdev->strlen < __DEVICE_PATH_PREFIX_LEN)
return NT_STATUS_INVALID_HANDLE;
hash = __ntapi->tt_buffer_crc32(
0,
sdev->buffer,
__DEVICE_PATH_PREFIX_LEN);
if (hash != __DEVICE_PATH_PREFIX_HASH)
return NT_STATUS_INVALID_HANDLE;
wch_mark = sdev->buffer + __DEVICE_PATH_PREFIX_LEN/sizeof(wchar16_t);
wch = wch_mark;
while (*wch != '\\') wch++;
istat->dev_name_strlen = (uint16_t)((wch - sdev->buffer) * sizeof(uint16_t));
istat->dev_name_hash = __ntapi->tt_buffer_crc32(
hash,
wch_mark,
(uintptr_t)wch - (uintptr_t)wch_mark);
return status;
}
int32_t __stdcall __ntapi_tt_validate_fs_handle(
__in void * hfile,
__in uint32_t dev_name_hash,
__in nt_fii fii,
__out uintptr_t * buffer,
__in uint32_t buffer_size)
{
int32_t status;
nt_istat istat;
status = __ntapi->tt_istat(
hfile,
(void *)0,
(nt_unicode_string *)0,
&istat,
buffer,
buffer_size,
0,
NT_ISTAT_DEFAULT);
if (status) return status;
if (istat.fii.index_number.quad != fii.index_number.quad)
return NT_STATUS_CONTEXT_MISMATCH;
else if (istat.dev_name_hash != dev_name_hash)
return NT_STATUS_CONTEXT_MISMATCH;
return NT_STATUS_SUCCESS;
}
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