/********************************************************/
/* ntapi: Native API core library */
/* Copyright (C) 2013--2016 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
/********************************************************/
#include <ntapi/nt_object.h>
#include <ntapi/nt_file.h>
#include <ntapi/nt_mount.h>
#include <ntapi/nt_atomic.h>
#include <ntapi/ntapi.h>
#include "ntapi_impl.h"
typedef enum __dos_drive_handle_type {
__DOS_DRIVE_DEVICE_HANDLE,
__DOS_DRIVE_ROOT_HANDLE
} _dos_drive_handle_type;
typedef struct __dos_name_buffer {
wchar16_t global_prefix[4];
wchar16_t dos_letter;
wchar16_t colon;
wchar16_t root;
wchar16_t null_termination;
} _dos_name_buffer;
static int32_t __stdcall __tt_connect_to_mount_point_manager(void)
{
int32_t status;
void * hdev;
void * hdev_prev;
nt_oa oa;
nt_iosb iosb;
nt_unicode_string dev_name;
uint16_t dev_name_buffer[] = {
'\\','?','?','\\',
'M','o','u','n','t',
'P','o','i','n','t',
'M','a','n','a','g','e','r',0};
dev_name.strlen = sizeof(wchar16_t) * (4+5+5+7);
dev_name.maxlen = 0;
dev_name.buffer = dev_name_buffer;
oa.len = sizeof(nt_oa);
oa.root_dir = (void *)0;
oa.obj_name = &dev_name;
oa.obj_attr = NT_OBJ_CASE_INSENSITIVE;
oa.sec_desc = (nt_sd *)0;
oa.sec_qos = (nt_sqos *)0;
status = __ntapi->zw_create_file(
&hdev,
NT_SEC_SYNCHRONIZE | NT_FILE_READ_ATTRIBUTES,
&oa,
&iosb,
0,
NT_FILE_ATTRIBUTE_NORMAL,
NT_FILE_SHARE_READ | NT_FILE_SHARE_WRITE,
NT_FILE_OPEN,
NT_FILE_NON_DIRECTORY_FILE | NT_FILE_SYNCHRONOUS_IO_NONALERT,
(void *)0,
0);
if (status != NT_STATUS_SUCCESS)
return status;
hdev_prev = (void *)at_locked_cas(
(intptr_t *)&__ntapi_internals()->hdev_mount_point_mgr,
0,(intptr_t)hdev);
if (hdev_prev)
__ntapi->zw_close(hdev);
return status;
}
static int32_t __stdcall __tt_get_dos_drive_device_or_root_handle(
__out void ** hdrive,
__in wchar16_t drive_letter,
__in _dos_drive_handle_type handle_type)
{
#define __common_mode (NT_FILE_SYNCHRONOUS_IO_ALERT)
#define __common_access (NT_SEC_SYNCHRONIZE \
| NT_FILE_READ_ATTRIBUTES)
int32_t status;
nt_oa oa;
nt_iosb iosb;
uint32_t open_flags;
uint32_t access_flags;
nt_unicode_string dos_name;
_dos_name_buffer dos_name_buffer = {
{'\\','?','?','\\'},
'_',':',0,0};
if ((drive_letter>='A') && (drive_letter<='Z'))
dos_name_buffer.dos_letter = drive_letter;
else if ((drive_letter>='a') && (drive_letter<='z'))
dos_name_buffer.dos_letter = drive_letter + 'A' - 'a';
else
return NT_STATUS_INVALID_PARAMETER_2;
dos_name.strlen = ((size_t)(&((_dos_name_buffer *)0)->root));
dos_name.maxlen = 0;
dos_name.buffer = &(dos_name_buffer.global_prefix[0]);
switch (handle_type) {
case __DOS_DRIVE_DEVICE_HANDLE:
open_flags = __common_mode;
access_flags = __common_access;
break;
case __DOS_DRIVE_ROOT_HANDLE:
open_flags = __common_mode | NT_FILE_DIRECTORY_FILE;
access_flags = __common_access | NT_FILE_READ_ACCESS;
dos_name_buffer.root = '\\';
dos_name.strlen += sizeof(wchar16_t);
break;
default:
open_flags = 0;
access_flags = 0;
break;
}
oa.len = sizeof(nt_oa);
oa.root_dir = (void *)0;
oa.obj_name = &dos_name;
oa.obj_attr = NT_OBJ_INHERIT;
oa.sec_desc = (nt_sd *)0;
oa.sec_qos = (nt_sqos *)0;
status = __ntapi->zw_open_file(
hdrive,
access_flags,
&oa,
&iosb,
NT_FILE_SHARE_READ | NT_FILE_SHARE_WRITE,
open_flags);
return status;
}
int32_t __stdcall __ntapi_tt_get_dos_drive_device_handle(
__out void ** hdevice,
__in wchar16_t drive_letter)
{
return __tt_get_dos_drive_device_or_root_handle(
hdevice,
drive_letter,
__DOS_DRIVE_DEVICE_HANDLE);
}
int32_t __stdcall __ntapi_tt_get_dos_drive_root_handle(
__out void ** hroot,
__in wchar16_t drive_letter)
{
return __tt_get_dos_drive_device_or_root_handle(
hroot,
drive_letter,
__DOS_DRIVE_ROOT_HANDLE);
}
int32_t __stdcall __ntapi_tt_get_dos_drive_device_name(
__in void * hdevice __optional,
__in wchar16_t drive_letter __optional,
__out nt_mount_dev_name * buffer,
__in uint32_t buffer_size)
{
int32_t status;
nt_iosb iosb;
if (!hdevice && (status = __tt_get_dos_drive_device_or_root_handle(
&hdevice,
drive_letter,
__DOS_DRIVE_DEVICE_HANDLE)))
return status;
return __ntapi->zw_device_io_control_file(
hdevice,
(void *)0,
(nt_io_apc_routine *)0,
(void *)0,
&iosb,
NT_IOCTL_MOUNTDEV_QUERY_DEVICE_NAME,
(void *)0,
0,
buffer,
buffer_size);
}
int32_t __stdcall __ntapi_tt_get_dos_drive_mount_points(
__in void * hdevice __optional,
__in wchar16_t drive_letter __optional,
__in nt_mount_dev_name * dev_name __optional,
__out void * buffer,
__in uint32_t buffer_size)
{
int32_t status;
nt_iosb iosb;
wchar16_t dev_name_buffer[64];
nt_mount_point_param * dev_mount_point;
nt_mount_points * dev_mount_points;
uintptr_t addr;
if (!dev_name) {
dev_name = (nt_mount_dev_name *)&dev_name_buffer;
if ((status = __ntapi_tt_get_dos_drive_device_name(
hdevice,
drive_letter,
dev_name,
sizeof(dev_name_buffer))))
return status;
}
if (buffer_size < sizeof(nt_mount_mgr_mount_point) \
+ sizeof(nt_mount_dev_name) \
+ sizeof(dev_name->name_length))
return NT_STATUS_BUFFER_TOO_SMALL;
dev_mount_point = (nt_mount_point_param *)buffer;
dev_mount_point->symlink_name_offset = 0;
dev_mount_point->symlink_name_length = 0;
dev_mount_point->unique_id_offset = 0;
dev_mount_point->unique_id_length = 0;
dev_mount_point->device_name_offset = ((size_t)(&((nt_mount_point_param *)0)->device_name));
dev_mount_point->device_name_length = dev_name->name_length;
dev_mount_point->mount_points_offset = 0;
__ntapi->tt_memcpy_utf16(
dev_mount_point->device_name,
dev_name->name,
dev_name->name_length);
addr = (uintptr_t)(dev_mount_point->device_name) + dev_name->name_length;
addr += sizeof(uintptr_t) - 1;
addr /= sizeof(uintptr_t);
addr *= sizeof(uintptr_t);
dev_mount_points = (nt_mount_points *)addr;
if (!__ntapi_internals()->hdev_mount_point_mgr)
status = __tt_connect_to_mount_point_manager();
if (!__ntapi_internals()->hdev_mount_point_mgr)
return status;
status = __ntapi->zw_device_io_control_file(
__ntapi_internals()->hdev_mount_point_mgr,
(void *)0,
(nt_io_apc_routine *)0,
(void *)0,
&iosb,
NT_IOCTL_MOUNTMGR_QUERY_POINTS,
dev_mount_point,
(uint32_t)(uintptr_t)&(((nt_mount_point_param *)0)->device_name) + dev_name->name_length,
dev_mount_points,
(uint32_t)((uintptr_t)buffer + buffer_size - addr));
dev_mount_point->mount_points_offset = (uint16_t)((uintptr_t)addr - (uintptr_t)buffer);
return status;
}
int32_t __stdcall __ntapi_tt_dev_mount_points_to_statfs(
__in nt_mount_points * mount_points,
__in_out nt_statfs * statfs)
{
int32_t status;
uint32_t i;
nt_mount_mgr_mount_point * mount_point;
wchar16_t * symlink;
mount_point = mount_points->mount_points;
statfs->nt_drive_letter = 0;
for (i = 0; i < mount_points->number; i++, mount_point++) {
symlink = (wchar16_t *)mount_points;
symlink += mount_point->symlink_name_offset / sizeof(wchar16_t);
if (symlink[0] != '\\')
return NT_STATUS_UNEXPECTED_IO_ERROR;
if ((symlink[1] == 'D')
&& (symlink[2] == 'o')
&& (symlink[3] == 's')
&& (symlink[4] == 'D')
&& (symlink[5] == 'e')
&& (symlink[6] == 'v')
&& (symlink[7] == 'i')
&& (symlink[8] == 'c')
&& (symlink[9] == 'e')
&& (symlink[10] == 's'))
statfs->nt_drive_letter = ((nt_dos_devices_name *)(symlink))->letter;
else if ((symlink[1] == '?')
&& (symlink[2] == '?')
&& (symlink[3] == '\\')
&& (symlink[4] == 'V')
&& (symlink[5] == 'o')
&& (symlink[6] == 'l')
&& (symlink[7] == 'u')
&& (symlink[8] == 'm')
&& (symlink[9] == 'e')
&& (symlink[10] == '{')) {
if ((status = __ntapi_tt_utf16_string_to_guid(
(nt_guid_str_utf16 *)&symlink[10],
&statfs->nt_volume_guid)))
return status;
}
}
return NT_STATUS_SUCCESS;
}
int32_t __stdcall __ntapi_tt_get_dos_drive_letter_from_device(
__in void * hdevice __optional,
__out wchar16_t * drive_letter,
__in nt_mount_dev_name * dev_name __optional,
__out void * buffer,
__in uint32_t buffer_size)
{
int32_t status;
wchar16_t dev_name_buffer[128];
nt_statfs statfs;
uint32_t offset;
nt_mount_points * mnt_points;
(void)buffer_size;
if (!dev_name) {
dev_name = (nt_mount_dev_name *)&dev_name_buffer;
if ((status = __ntapi_tt_get_dos_drive_device_name(
hdevice,0,dev_name,
sizeof(dev_name_buffer))))
return status;
}
offset = ((nt_mount_point_param *)buffer)->mount_points_offset;
mnt_points = (nt_mount_points *)((uintptr_t)buffer + offset);
status = __ntapi_tt_dev_mount_points_to_statfs(
mnt_points,
&statfs);
if (status != NT_STATUS_SUCCESS)
return status;
*drive_letter = statfs.nt_drive_letter;
return status;
}