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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* Unix SMB/CIFS implementation.
* Virtual Windows Registry Layer
* Copyright (C) Gerald Carter 2002-2005
* Copyright (C) Michael Adam 2006
*
* 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/>.
*/
/*
* Implementation of registry frontend view functions.
* Functions moved from reg_frontend.c to minimize linker deps.
*/
#include "includes.h"
static struct generic_mapping reg_generic_map =
{ REG_KEY_READ, REG_KEY_WRITE, REG_KEY_EXECUTE, REG_KEY_ALL };
/********************************************************************
********************************************************************/
static SEC_DESC* construct_registry_sd( TALLOC_CTX *ctx )
{
SEC_ACE ace[3];
SEC_ACCESS mask;
size_t i = 0;
SEC_DESC *sd;
SEC_ACL *acl;
size_t sd_size;
/* basic access for Everyone */
init_sec_access(&mask, REG_KEY_READ );
init_sec_ace(&ace[i++], &global_sid_World, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
/* Full Access 'BUILTIN\Administrators' */
init_sec_access(&mask, REG_KEY_ALL );
init_sec_ace(&ace[i++], &global_sid_Builtin_Administrators, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
/* Full Access 'NT Authority\System' */
init_sec_access(&mask, REG_KEY_ALL );
init_sec_ace(&ace[i++], &global_sid_System, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
/* create the security descriptor */
if ( !(acl = make_sec_acl(ctx, NT4_ACL_REVISION, i, ace)) )
return NULL;
if ( !(sd = make_sec_desc(ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE, NULL, NULL, NULL, acl, &sd_size)) )
return NULL;
return sd;
}
/***********************************************************************
High level wrapper function for storing registry subkeys
***********************************************************************/
BOOL store_reg_keys( REGISTRY_KEY *key, REGSUBKEY_CTR *subkeys )
{
if ( key->hook && key->hook->ops && key->hook->ops->store_subkeys )
return key->hook->ops->store_subkeys( key->name, subkeys );
return False;
}
/***********************************************************************
High level wrapper function for storing registry values
***********************************************************************/
BOOL store_reg_values( REGISTRY_KEY *key, REGVAL_CTR *val )
{
if ( check_dynamic_reg_values( key ) )
return False;
if ( key->hook && key->hook->ops && key->hook->ops->store_values )
return key->hook->ops->store_values( key->name, val );
return False;
}
/***********************************************************************
High level wrapper function for enumerating registry subkeys
Initialize the TALLOC_CTX if necessary
***********************************************************************/
int fetch_reg_keys( REGISTRY_KEY *key, REGSUBKEY_CTR *subkey_ctr )
{
int result = -1;
if ( key->hook && key->hook->ops && key->hook->ops->fetch_subkeys )
result = key->hook->ops->fetch_subkeys( key->name, subkey_ctr );
return result;
}
/***********************************************************************
High level wrapper function for enumerating registry values
***********************************************************************/
int fetch_reg_values( REGISTRY_KEY *key, REGVAL_CTR *val )
{
int result = -1;
if ( key->hook && key->hook->ops && key->hook->ops->fetch_values )
result = key->hook->ops->fetch_values( key->name, val );
/* if the backend lookup returned no data, try the dynamic overlay */
if ( result == 0 ) {
result = fetch_dynamic_reg_values( key, val );
return ( result != -1 ) ? result : 0;
}
return result;
}
/***********************************************************************
High level access check for passing the required access mask to the
underlying registry backend
***********************************************************************/
BOOL regkey_access_check( REGISTRY_KEY *key, uint32 requested, uint32 *granted,
const struct nt_user_token *token )
{
SEC_DESC *sec_desc;
NTSTATUS status;
WERROR err;
TALLOC_CTX *mem_ctx;
/* use the default security check if the backend has not defined its
* own */
if (key->hook && key->hook->ops && key->hook->ops->reg_access_check) {
return key->hook->ops->reg_access_check( key->name, requested,
granted, token );
}
/*
* The secdesc routines can't yet cope with a NULL talloc ctx sanely.
*/
if (!(mem_ctx = talloc_init("regkey_access_check"))) {
return False;
}
err = regkey_get_secdesc(mem_ctx, key, &sec_desc);
if (!W_ERROR_IS_OK(err)) {
TALLOC_FREE(mem_ctx);
return False;
}
se_map_generic( &requested, ®_generic_map );
if (!se_access_check(sec_desc, token, requested, granted, &status)) {
TALLOC_FREE(mem_ctx);
return False;
}
TALLOC_FREE(mem_ctx);
return NT_STATUS_IS_OK(status);
}
WERROR regkey_get_secdesc(TALLOC_CTX *mem_ctx, REGISTRY_KEY *key,
struct security_descriptor **psecdesc)
{
struct security_descriptor *secdesc;
if (key->hook && key->hook->ops && key->hook->ops->get_secdesc) {
WERROR err;
err = key->hook->ops->get_secdesc(mem_ctx, key->name,
psecdesc);
if (W_ERROR_IS_OK(err)) {
return WERR_OK;
}
}
if (!(secdesc = construct_registry_sd(mem_ctx))) {
return WERR_NOMEM;
}
*psecdesc = secdesc;
return WERR_OK;
}
|
