source: vendor/3.6.0/source4/dsdb/samdb/samdb.c

Last change on this file was 740, checked in by Silvan Scherrer, 13 years ago

Samba Server: update vendor to 3.6.0
File size: 7.2 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 interface functions for the sam database
5
6 Copyright (C) Andrew Tridgell 2004
7 Copyright (C) Volker Lendecke 2004
8 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
22*/
23
24#include "includes.h"
25#include "librpc/gen_ndr/ndr_netlogon.h"
26#include "librpc/gen_ndr/ndr_security.h"
27#include "lib/events/events.h"
28#include "lib/ldb-samba/ldb_wrap.h"
29#include <ldb.h>
30#include <ldb_errors.h>
31#include "libcli/security/security.h"
32#include "libcli/auth/libcli_auth.h"
33#include "libcli/ldap/ldap_ndr.h"
34#include "system/time.h"
35#include "system/filesys.h"
36#include "ldb_wrap.h"
37#include "../lib/util/util_ldb.h"
38#include "dsdb/samdb/samdb.h"
39#include "../libds/common/flags.h"
40#include "param/param.h"
41#include "lib/events/events.h"
42#include "auth/credentials/credentials.h"
43#include "param/secrets.h"
44#include "auth/auth.h"
45
46/*
47 make sure the static credentials are not freed
48 */
49static int samdb_credentials_destructor(struct cli_credentials *creds)
50{
51 return -1;
52}
53
54/*
55 this returns a static set of system credentials. It is static so
56 that we always get the same pointer in ldb_wrap_connect()
57 */
58struct cli_credentials *samdb_credentials(struct loadparm_context *lp_ctx)
59{
60 static struct cli_credentials *static_credentials;
61 struct cli_credentials *cred;
62 char *error_string;
63
64 if (static_credentials) {
65 return static_credentials;
66 }
67
68 cred = cli_credentials_init(talloc_autofree_context());
69 if (!cred) {
70 return NULL;
71 }
72 cli_credentials_set_conf(cred, lp_ctx);
73
74 /* We don't want to use krb5 to talk to our samdb - recursion
75 * here would be bad, and this account isn't in the KDC
76 * anyway */
77 cli_credentials_set_kerberos_state(cred, CRED_DONT_USE_KERBEROS);
78
79 if (!NT_STATUS_IS_OK(cli_credentials_set_secrets(cred, lp_ctx, NULL, NULL,
80 SECRETS_LDAP_FILTER, &error_string))) {
81 DEBUG(5, ("(normal if no LDAP backend) %s", error_string));
82 /* Perfectly OK - if not against an LDAP backend */
83 talloc_free(cred);
84 return NULL;
85 }
86 static_credentials = cred;
87 talloc_set_destructor(cred, samdb_credentials_destructor);
88 return cred;
89}
90
91/*
92 connect to the SAM database
93 return an opaque context pointer on success, or NULL on failure
94 */
95struct ldb_context *samdb_connect(TALLOC_CTX *mem_ctx,
96 struct tevent_context *ev_ctx,
97 struct loadparm_context *lp_ctx,
98 struct auth_session_info *session_info,
99 int flags)
100{
101 struct ldb_context *ldb;
102 struct dsdb_schema *schema;
103 const char *url;
104 struct cli_credentials *credentials;
105 int ret;
106
107 url = lpcfg_sam_url(lp_ctx);
108 credentials = samdb_credentials(lp_ctx);
109
110 ldb = ldb_wrap_find(url, ev_ctx, lp_ctx, session_info, credentials, flags);
111 if (ldb != NULL)
112 return talloc_reference(mem_ctx, ldb);
113
114 ldb = samba_ldb_init(mem_ctx, ev_ctx, lp_ctx, session_info, credentials);
115
116 if (ldb == NULL)
117 return NULL;
118
119 dsdb_set_global_schema(ldb);
120
121 ret = samba_ldb_connect(ldb, lp_ctx, url, flags);
122 if (ret != LDB_SUCCESS) {
123 talloc_free(ldb);
124 return NULL;
125 }
126
127 schema = dsdb_get_schema(ldb, NULL);
128 /* make the resulting schema global */
129 if (schema) {
130 dsdb_make_schema_global(ldb, schema);
131 }
132
133 if (!ldb_wrap_add(url, ev_ctx, lp_ctx, session_info, credentials, flags, ldb)) {
134 talloc_free(ldb);
135 return NULL;
136 }
137
138 return ldb;
139}
140
141
142/****************************************************************************
143 Create the SID list for this user.
144****************************************************************************/
145NTSTATUS security_token_create(TALLOC_CTX *mem_ctx,
146 struct loadparm_context *lp_ctx,
147 unsigned int num_sids,
148 struct dom_sid *sids,
149 uint32_t session_info_flags,
150 struct security_token **token)
151{
152 struct security_token *ptoken;
153 unsigned int i;
154 NTSTATUS status;
155
156 ptoken = security_token_initialise(mem_ctx);
157 NT_STATUS_HAVE_NO_MEMORY(ptoken);
158
159 ptoken->sids = talloc_array(ptoken, struct dom_sid, num_sids + 6 /* over-allocate */);
160 NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
161
162 ptoken->num_sids = 0;
163
164 for (i = 0; i < num_sids; i++) {
165 size_t check_sid_idx;
166 for (check_sid_idx = 0;
167 check_sid_idx < ptoken->num_sids;
168 check_sid_idx++) {
169 if (dom_sid_equal(&ptoken->sids[check_sid_idx], &sids[i])) {
170 break;
171 }
172 }
173
174 if (check_sid_idx == ptoken->num_sids) {
175 ptoken->sids = talloc_realloc(ptoken, ptoken->sids, struct dom_sid, ptoken->num_sids + 1);
176 NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
177
178 ptoken->sids[ptoken->num_sids] = sids[i];
179 ptoken->num_sids++;
180 }
181 }
182
183 /*
184 * Finally add the "standard" sids.
185 * The only difference between guest and "anonymous"
186 * is the addition of Authenticated_Users.
187 */
188
189 if (session_info_flags & AUTH_SESSION_INFO_DEFAULT_GROUPS) {
190 ptoken->sids = talloc_realloc(ptoken, ptoken->sids, struct dom_sid, ptoken->num_sids + 2);
191 NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
192
193 if (!dom_sid_parse(SID_WORLD, &ptoken->sids[ptoken->num_sids])) {
194 return NT_STATUS_INTERNAL_ERROR;
195 }
196 ptoken->num_sids++;
197
198 if (!dom_sid_parse(SID_NT_NETWORK, &ptoken->sids[ptoken->num_sids])) {
199 return NT_STATUS_INTERNAL_ERROR;
200 }
201 ptoken->num_sids++;
202 }
203
204 if (session_info_flags & AUTH_SESSION_INFO_AUTHENTICATED) {
205 ptoken->sids = talloc_realloc(ptoken, ptoken->sids, struct dom_sid, ptoken->num_sids + 1);
206 NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
207
208 if (!dom_sid_parse(SID_NT_AUTHENTICATED_USERS, &ptoken->sids[ptoken->num_sids])) {
209 return NT_STATUS_INTERNAL_ERROR;
210 }
211 ptoken->num_sids++;
212 }
213
214 /* The caller may have requested simple privilages, for example if there isn't a local DB */
215 if (session_info_flags & AUTH_SESSION_INFO_SIMPLE_PRIVILEGES) {
216 /* Shortcuts to prevent recursion and avoid lookups */
217 if (ptoken->sids == NULL) {
218 ptoken->privilege_mask = 0;
219 } else if (security_token_is_system(ptoken)) {
220 ptoken->privilege_mask = ~0;
221 } else if (security_token_is_anonymous(ptoken)) {
222 ptoken->privilege_mask = 0;
223 } else if (security_token_has_builtin_administrators(ptoken)) {
224 ptoken->privilege_mask = ~0;
225 } else {
226 /* All other 'users' get a empty priv set so far */
227 ptoken->privilege_mask = 0;
228 }
229 } else {
230 /* setup the privilege mask for this token */
231 status = samdb_privilege_setup(lp_ctx, ptoken);
232 if (!NT_STATUS_IS_OK(status)) {
233 talloc_free(ptoken);
234 DEBUG(1,("Unable to access privileges database\n"));
235 return status;
236 }
237 }
238
239 security_token_debug(0, 10, ptoken);
240
241 *token = ptoken;
242
243 return NT_STATUS_OK;
244}
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