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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/*
Unix SMB/CIFS implementation.
interface functions for the sam database
Copyright (C) Andrew Tridgell 2004
Copyright (C) Volker Lendecke 2004
Copyright (C) Andrew Bartlett <abartlet@samba.org> 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/>.
*/
#include "includes.h"
#include "librpc/gen_ndr/ndr_netlogon.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "librpc/gen_ndr/ndr_security.h"
#include "lib/events/events.h"
#include "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_errors.h"
#include "libcli/security/security.h"
#include "libcli/auth/libcli_auth.h"
#include "libcli/ldap/ldap_ndr.h"
#include "system/time.h"
#include "system/filesys.h"
#include "ldb_wrap.h"
#include "../lib/util/util_ldb.h"
#include "dsdb/samdb/samdb.h"
#include "../libds/common/flags.h"
#include "param/param.h"
#include "lib/events/events.h"
#include "auth/credentials/credentials.h"
#include "param/secrets.h"
#include "auth/auth.h"
/*
make sure the static credentials are not freed
*/
static int samdb_credentials_destructor(struct cli_credentials *creds)
{
return -1;
}
/*
this returns a static set of system credentials. It is static so
that we always get the same pointer in ldb_wrap_connect()
*/
struct cli_credentials *samdb_credentials(struct loadparm_context *lp_ctx)
{
static struct cli_credentials *static_credentials;
struct cli_credentials *cred;
char *error_string;
if (static_credentials) {
return static_credentials;
}
cred = cli_credentials_init(talloc_autofree_context());
if (!cred) {
return NULL;
}
cli_credentials_set_conf(cred, lp_ctx);
/* We don't want to use krb5 to talk to our samdb - recursion
* here would be bad, and this account isn't in the KDC
* anyway */
cli_credentials_set_kerberos_state(cred, CRED_DONT_USE_KERBEROS);
if (!NT_STATUS_IS_OK(cli_credentials_set_secrets(cred, lp_ctx, NULL, NULL,
SECRETS_LDAP_FILTER, &error_string))) {
DEBUG(5, ("(normal if no LDAP backend) %s", error_string));
/* Perfectly OK - if not against an LDAP backend */
talloc_free(cred);
return NULL;
}
static_credentials = cred;
talloc_set_destructor(cred, samdb_credentials_destructor);
return cred;
}
/*
connect to the SAM database
return an opaque context pointer on success, or NULL on failure
*/
struct ldb_context *samdb_connect(TALLOC_CTX *mem_ctx,
struct tevent_context *ev_ctx,
struct loadparm_context *lp_ctx,
struct auth_session_info *session_info,
int flags)
{
struct ldb_context *ldb;
struct dsdb_schema *schema;
const char *url;
struct cli_credentials *credentials;
int ret;
url = lpcfg_sam_url(lp_ctx);
credentials = samdb_credentials(lp_ctx);
ldb = ldb_wrap_find(url, ev_ctx, lp_ctx, session_info, credentials, flags);
if (ldb != NULL)
return talloc_reference(mem_ctx, ldb);
ldb = samba_ldb_init(mem_ctx, ev_ctx, lp_ctx, session_info, credentials);
if (ldb == NULL)
return NULL;
dsdb_set_global_schema(ldb);
ret = samba_ldb_connect(ldb, lp_ctx, url, flags);
if (ret != LDB_SUCCESS) {
talloc_free(ldb);
return NULL;
}
schema = dsdb_get_schema(ldb, NULL);
/* make the resulting schema global */
if (schema) {
dsdb_make_schema_global(ldb, schema);
}
if (!ldb_wrap_add(url, ev_ctx, lp_ctx, session_info, credentials, flags, ldb)) {
talloc_free(ldb);
return NULL;
}
return ldb;
}
/****************************************************************************
Create the SID list for this user.
****************************************************************************/
NTSTATUS security_token_create(TALLOC_CTX *mem_ctx,
struct tevent_context *ev_ctx,
struct loadparm_context *lp_ctx,
struct dom_sid *user_sid,
struct dom_sid *group_sid,
unsigned int n_groupSIDs,
struct dom_sid **groupSIDs,
uint32_t session_info_flags,
struct security_token **token)
{
struct security_token *ptoken;
unsigned int i;
NTSTATUS status;
ptoken = security_token_initialise(mem_ctx);
NT_STATUS_HAVE_NO_MEMORY(ptoken);
ptoken->sids = talloc_array(ptoken, struct dom_sid, n_groupSIDs + 6 /* over-allocate */);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
ptoken->num_sids = 1;
ptoken->sids = talloc_realloc(ptoken, ptoken->sids, struct dom_sid, ptoken->num_sids + 1);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
ptoken->sids[PRIMARY_USER_SID_INDEX] = *user_sid;
if (!dom_sid_equal(user_sid, group_sid)) {
ptoken->sids[PRIMARY_GROUP_SID_INDEX] = *group_sid;
ptoken->num_sids++;
}
/*
* Finally add the "standard" SIDs.
* The only difference between guest and "anonymous"
* is the addition of Authenticated_Users.
*/
if (session_info_flags & AUTH_SESSION_INFO_DEFAULT_GROUPS) {
ptoken->sids = talloc_realloc(ptoken, ptoken->sids, struct dom_sid, ptoken->num_sids + 2);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
if (!dom_sid_parse(SID_WORLD, &ptoken->sids[ptoken->num_sids])) {
return NT_STATUS_INTERNAL_ERROR;
}
ptoken->num_sids++;
if (!dom_sid_parse(SID_NT_NETWORK, &ptoken->sids[ptoken->num_sids])) {
return NT_STATUS_INTERNAL_ERROR;
}
ptoken->num_sids++;
}
if (session_info_flags & AUTH_SESSION_INFO_AUTHENTICATED) {
ptoken->sids = talloc_realloc(ptoken, ptoken->sids, struct dom_sid, ptoken->num_sids + 1);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
if (!dom_sid_parse(SID_NT_AUTHENTICATED_USERS, &ptoken->sids[ptoken->num_sids])) {
return NT_STATUS_INTERNAL_ERROR;
}
ptoken->num_sids++;
}
for (i = 0; i < n_groupSIDs; i++) {
size_t check_sid_idx;
for (check_sid_idx = 1;
check_sid_idx < ptoken->num_sids;
check_sid_idx++) {
if (dom_sid_equal(&ptoken->sids[check_sid_idx], groupSIDs[i])) {
break;
}
}
if (check_sid_idx == ptoken->num_sids) {
ptoken->sids = talloc_realloc(ptoken, ptoken->sids, struct dom_sid, ptoken->num_sids + 1);
NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
ptoken->sids[ptoken->num_sids] = *groupSIDs[i];
ptoken->num_sids++;
}
}
/* setup the privilege mask for this token */
status = samdb_privilege_setup(ev_ctx, lp_ctx, ptoken);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(ptoken);
return status;
}
security_token_debug(0, 10, ptoken);
*token = ptoken;
return NT_STATUS_OK;
}
|
