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
171
172
173
174
|
/*
* Unix SMB/CIFS implementation.
*
* Implementation of
* http://msdn.microsoft.com/en-us/library/cc232006%28v=PROT.13%29.aspx
*
* Copyright (C) Volker Lendecke 2011
*
* 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 "include/client.h"
#include "libsmb/proto.h"
#include "include/ntioctl.h"
bool symlink_reparse_buffer_marshall(
const char *substitute, const char *printname, uint32_t flags,
TALLOC_CTX *mem_ctx, uint8_t **pdst, size_t *pdstlen)
{
uint8_t *dst = NULL;
size_t dst_len;
uint8_t *subst_utf16 = NULL;
uint8_t *print_utf16 = NULL;
size_t subst_len = 0;
size_t print_len = 0;
if (substitute == NULL) {
return false;
}
if (printname == NULL) {
printname = substitute;
}
if (!convert_string_talloc(talloc_tos(), CH_UNIX, CH_UTF16,
substitute, strlen(substitute),
&subst_utf16, &subst_len)) {
goto fail;
}
if (!convert_string_talloc(talloc_tos(), CH_UNIX, CH_UTF16,
printname, strlen(printname),
&print_utf16, &print_len)) {
goto fail;
}
dst_len = 20 + subst_len + print_len;
dst = talloc_array(mem_ctx, uint8_t, dst_len);
if (dst == NULL) {
goto fail;
}
SIVAL(dst, 0, IO_REPARSE_TAG_SYMLINK); /* ReparseTag */
SSVAL(dst, 4, 12 + subst_len + print_len); /* ReparseDataLength */
SSVAL(dst, 6, 0); /* Reserved */
SSVAL(dst, 8, 0); /* SubstituteNameOffset */
SSVAL(dst, 10, subst_len); /* SubstituteNameLength */
SSVAL(dst, 12, subst_len); /* PrintNameOffset */
SSVAL(dst, 14, print_len); /* PrintNameLength */
SIVAL(dst, 16, flags); /* Flags */
if ((subst_utf16 != NULL) && (subst_len != 0)) {
memcpy(dst + 20, subst_utf16, subst_len);
TALLOC_FREE(subst_utf16);
}
if ((print_utf16 != NULL) && (print_len != 0)) {
memcpy(dst + 20 + subst_len, print_utf16, print_len);
TALLOC_FREE(print_utf16);
}
*pdst = dst;
*pdstlen = dst_len;
return true;
fail:
TALLOC_FREE(subst_utf16);
TALLOC_FREE(print_utf16);
return false;
}
bool symlink_reparse_buffer_parse(
const uint8_t *src, size_t srclen, TALLOC_CTX *mem_ctx,
char **psubstitute_name, char **pprint_name, uint32_t *pflags)
{
uint16_t reparse_data_length;
uint16_t substitute_name_offset, substitute_name_length;
uint16_t print_name_offset, print_name_length;
uint32_t flags;
char *substitute_name = NULL;
char *print_name = NULL;
if (srclen < 20) {
DEBUG(10, ("srclen = %d, expected >= 20\n", (int)srclen));
return false;
}
if (IVAL(src, 0) != IO_REPARSE_TAG_SYMLINK) {
DEBUG(10, ("Got ReparseTag %8.8x, expected %8.8x\n",
IVAL(src, 0), IO_REPARSE_TAG_SYMLINK));
return false;
}
reparse_data_length = SVAL(src, 4);
substitute_name_offset = SVAL(src, 8);
substitute_name_length = SVAL(src, 10);
print_name_offset = SVAL(src, 12);
print_name_length = SVAL(src, 14);
flags = IVAL(src, 16);
if (reparse_data_length < 12) {
DEBUG(10, ("reparse_data_length = %d, expected >= 12\n",
(int)reparse_data_length));
return false;
}
if (trans_oob(srclen - 8, reparse_data_length, 0)) {
DEBUG(10, ("reparse_data_length (%d) too large for "
"src_len (%d)\n", (int)reparse_data_length,
(int)srclen));
return false;
}
if (trans_oob(reparse_data_length - 12, substitute_name_offset,
substitute_name_length)) {
DEBUG(10, ("substitute_name (%d/%d) does not fit in "
"reparse_data_length (%d)\n",
(int)substitute_name_offset,
(int)substitute_name_length,
(int)reparse_data_length - 12));
return false;
}
if (trans_oob(reparse_data_length - 12, print_name_offset,
print_name_length)) {
DEBUG(10, ("print_name (%d/%d) does not fit in "
"reparse_data_length (%d)\n",
(int)print_name_offset,
(int)print_name_length,
(int)reparse_data_length - 12));
return false;
}
if ((psubstitute_name != NULL) &&
!convert_string_talloc(mem_ctx, CH_UTF16, CH_UNIX,
src + 20 + substitute_name_offset,
substitute_name_length,
&substitute_name, NULL)) {
DEBUG(10, ("convert_string_talloc for substitute_name "
"failed\n"));
return false;
}
if ((pprint_name != NULL) &&
!convert_string_talloc(mem_ctx, CH_UTF16, CH_UNIX,
src + 20 + print_name_offset,
print_name_length,
&print_name, NULL)) {
DEBUG(10, ("convert_string_talloc for print_name "
"failed\n"));
TALLOC_FREE(substitute_name);
return false;
}
if (psubstitute_name != NULL) {
*psubstitute_name = substitute_name;
}
if (pprint_name != NULL) {
*pprint_name = print_name;
}
return true;
}
|
