1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/********************************************************/
/* ntapi: Native API core library */
/* Copyright (C) 2013--2016 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_stat.h>
#include "ntapi_impl.h"
int32_t __stdcall __ntapi_tt_stat(
__in void * hfile,
__out nt_stat * stat,
__in uint32_t infolen,
__out uintptr_t * buffer,
__in uint32_t buffer_size,
__in uint32_t flags)
{
int32_t status;
nt_iosb iosb;
nt_unicode_string * sdev;
nt_fai * fai;
wchar16_t * wch;
wchar16_t * wch_mark;
uint32_t hash;
uint32_t written;
/* validation */
if (infolen < sizeof(*stat))
return NT_STATUS_INFO_LENGTH_MISMATCH;
/* init */
__ntapi->tt_aligned_block_memset(
stat,0,sizeof(*stat));
stat->hfile = hfile;
stat->dev_name_maxlen = (uint16_t)infolen - sizeof(*stat);
/* system-unique device name */
if ((status = __ntapi->zw_query_information_file(
hfile,
&iosb,
buffer,
buffer_size,
NT_FILE_ALL_INFORMATION)))
return status;
/* copy file info minus name */
__ntapi->tt_aligned_block_memcpy(
(uintptr_t *)stat,
(uintptr_t *)buffer,
((size_t)(&((nt_fai *)0)->name_info)));
/* record volume-relative file name length */
fai = (nt_fai *)buffer;
stat->file_name_length = fai->name_info.file_name_length;
/* file system size information */
if ((status = __ntapi->zw_query_volume_information_file(
hfile,
&iosb,
&(stat->fssi),
sizeof(stat->fssi),
NT_FILE_FS_SIZE_INFORMATION)))
return status;
/* system-unique device name */
if ((status = __ntapi->zw_query_object(
hfile,
NT_OBJECT_NAME_INFORMATION,
buffer,
buffer_size,
&written)))
return status;
sdev = (nt_unicode_string *)buffer;
wch = sdev->buffer;
if (sdev->strlen < __DEVICE_PATH_PREFIX_LEN)
return NT_STATUS_NOT_SUPPORTED;
if ((wch[0] != '\\')
|| (wch[1] != 'D')
|| (wch[2] != 'e')
|| (wch[3] != 'v')
|| (wch[4] != 'i')
|| (wch[5] != 'c')
|| (wch[6] != 'e')
|| (wch[7] != '\\'))
return NT_STATUS_NOT_SUPPORTED;
if ((sdev->strlen >= __DEVICE_MUP_PREFIX_LEN)
&& (wch[8]=='M')
&& (wch[9]=='u')
&& (wch[10]=='p')
&& (wch[11]=='\\')) {
hash = __DEVICE_MUP_PREFIX_HASH;
stat->flags |= NT_STAT_MUP_DEVICE;
wch_mark = &wch[12];
wch = wch_mark;
for (; *wch!='\\'; )
wch++;
wch++;
} else {
wch_mark = &wch[8];
wch = wch_mark;
hash = __DEVICE_PATH_PREFIX_HASH;
}
for (; *wch!='\\'; )
wch++;
stat->obj_name_strlen = sdev->strlen;
stat->obj_name_maxlen = stat->dev_name_maxlen;
stat->dev_name_strlen = sizeof(uint16_t) * (uint16_t)(wch - sdev->buffer);
stat->dev_name_hash = __ntapi->tt_buffer_crc32(
hash,wch_mark,
sizeof(wchar16_t) * (wch - wch_mark));
if (!(flags & NT_STAT_DEV_NAME_COPY))
return NT_STATUS_SUCCESS;
else if (stat->dev_name_maxlen < sdev->strlen)
return NT_STATUS_BUFFER_TOO_SMALL;
__ntapi->tt_memcpy_utf16(
(wchar16_t *)stat->dev_name,
(wchar16_t *)sdev->buffer,
sdev->strlen);
return NT_STATUS_SUCCESS;
}
|
