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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
Unix SMB/CIFS implementation.
SMB2 POSIX code.
Copyright (C) Jeremy Allison 2022
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "smbd/smbd.h"
#include "passdb/lookup_sid.h"
#include "librpc/gen_ndr/ndr_security.h"
/*
* SMB2 POSIX create context return details.
*/
DATA_BLOB smb2_posix_cc_info(TALLOC_CTX *mem_ctx,
connection_struct *conn,
uint32_t reparse_tag,
const SMB_STRUCT_STAT *psbuf)
{
DATA_BLOB ret_blob = data_blob_null;
struct dom_sid sid_owner;
struct dom_sid sid_group;
size_t owner_sid_size = 0;
size_t group_sid_size = 0;
size_t b_size = 12;
uid_to_sid(&sid_owner, psbuf->st_ex_uid);
owner_sid_size = ndr_size_dom_sid(&sid_owner, 0);
if (b_size + owner_sid_size < b_size) {
return data_blob_null;
}
b_size += owner_sid_size;
gid_to_sid(&sid_group, psbuf->st_ex_gid);
group_sid_size = ndr_size_dom_sid(&sid_group, 0);
if (b_size + group_sid_size < b_size) {
return data_blob_null;
}
b_size += group_sid_size;
ret_blob = data_blob_talloc(mem_ctx,
NULL,
b_size);
if (ret_blob.data == NULL) {
return data_blob_null;
}
/* number of hard links */
PUSH_LE_U32(ret_blob.data, 0, psbuf->st_ex_nlink);
/* Reparse tag if FILE_FLAG_REPARSE is set, else zero. */
PUSH_LE_U32(ret_blob.data, 4, reparse_tag);
/*
* Remove type info from mode, leaving only the
* permissions and setuid/gid bits.
*/
PUSH_LE_U32(ret_blob.data,
8,
unix_perms_to_wire(psbuf->st_ex_mode & ~S_IFMT));
/* Now add in the owner and group sids. */
sid_linearize(ret_blob.data + 12,
b_size - 12,
&sid_owner);
sid_linearize(ret_blob.data + 12 + owner_sid_size,
b_size - owner_sid_size - 12,
&sid_group);
return ret_blob;
}
/*
* SMB2 POSIX info level.
*/
DATA_BLOB store_smb2_posix_info(TALLOC_CTX *mem_ctx,
connection_struct *conn,
const SMB_STRUCT_STAT *psbuf,
uint32_t reparse_tag,
uint32_t dos_attributes)
{
uint64_t file_id = SMB_VFS_FS_FILE_ID(conn, psbuf);
DATA_BLOB ret_blob = data_blob_null;
DATA_BLOB cc = smb2_posix_cc_info(mem_ctx,
conn,
reparse_tag,
psbuf);
if (cc.data == NULL) {
return data_blob_null;
}
if (cc.length + 68 < 68) {
data_blob_free(&cc);
return data_blob_null;
}
ret_blob = data_blob_talloc(mem_ctx,
NULL,
cc.length + 68);
if (ret_blob.data == NULL) {
data_blob_free(&cc);
return data_blob_null;
}
/* Timestamps. */
/* Birth (creation) time. */
put_long_date_timespec(TIMESTAMP_SET_NT_OR_BETTER,
(char *)ret_blob.data+0,
psbuf->st_ex_btime);
/* Access time. */
put_long_date_timespec(TIMESTAMP_SET_NT_OR_BETTER,
(char *)ret_blob.data+8,
psbuf->st_ex_atime);
/* Last write time. */
put_long_date_timespec(TIMESTAMP_SET_NT_OR_BETTER,
(char *)ret_blob.data+16,
psbuf->st_ex_mtime);
/* Change time. */
put_long_date_timespec(TIMESTAMP_SET_NT_OR_BETTER,
(char *)ret_blob.data+24,
psbuf->st_ex_ctime);
/* File size 64 Bit */
SOFF_T(ret_blob.data,32, get_file_size_stat(psbuf));
/* Number of bytes used on disk - 64 Bit */
SOFF_T(ret_blob.data,40,SMB_VFS_GET_ALLOC_SIZE(conn,NULL,psbuf));
/* DOS attributes */
if (S_ISREG(psbuf->st_ex_mode)) {
PUSH_LE_U32(ret_blob.data, 48, dos_attributes);
} else if (S_ISDIR(psbuf->st_ex_mode)) {
PUSH_LE_U32(ret_blob.data,
48,
dos_attributes|FILE_ATTRIBUTE_DIRECTORY);
} else {
/*
* All non-directory or regular files are reported
* as reparse points. Client may or may not be able
* to access these.
*/
PUSH_LE_U32(ret_blob.data,
48,
FILE_ATTRIBUTE_REPARSE_POINT);
}
/* Add the inode and dev (16 bytes). */
PUSH_LE_U64(ret_blob.data, 52, file_id);
PUSH_LE_U64(ret_blob.data, 60, psbuf->st_ex_dev);
/*
* Append a POSIX create context (variable bytes).
*/
memcpy(ret_blob.data + 68, cc.data, cc.length);
data_blob_free(&cc);
return ret_blob;
}
|
