2 Unix SMB/CIFS implementation.
3 Password and authentication handling
4 Copyright (C) Jeremy Allison 1996-2002
5 Copyright (C) Andrew Tridgell 2002
6 Copyright (C) Gerald (Jerry) Carter 2000
7 Copyright (C) Stefan (metze) Metzmacher 2002
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 /* NOTE! the global_sam_sid is the SID of our local SAM. This is only
26 equal to the domain SID when we are a DC, otherwise its our
28 static DOM_SID
*global_sam_sid
=NULL
;
31 #define DBGC_CLASS DBGC_PASSDB
33 /****************************************************************************
34 Read a SID from a file. This is for compatibility with the old MACHINE.SID
36 ****************************************************************************/
38 static bool read_sid_from_file(const char *fname
, DOM_SID
*sid
)
44 lines
= file_lines_load(fname
, &numlines
,0);
46 if (!lines
|| numlines
< 1) {
47 if (lines
) file_lines_free(lines
);
51 ret
= string_to_sid(sid
, lines
[0]);
52 file_lines_free(lines
);
57 generate a random sid - used to build our own sid if we don't have one
59 static void generate_random_sid(DOM_SID
*sid
)
62 uchar raw_sid_data
[12];
64 memset((char *)sid
, '\0', sizeof(*sid
));
68 sid
->sub_auths
[sid
->num_auths
++] = 21;
70 generate_random_buffer(raw_sid_data
, 12);
71 for (i
= 0; i
< 3; i
++)
72 sid
->sub_auths
[sid
->num_auths
++] = IVAL(raw_sid_data
, i
*4);
75 /****************************************************************************
76 Generate the global machine sid.
77 ****************************************************************************/
79 static DOM_SID
*pdb_generate_sam_sid(void)
85 if(!(sam_sid
=SMB_MALLOC_P(DOM_SID
)))
89 if (secrets_fetch_domain_sid(lp_workgroup(), &domain_sid
)) {
90 sid_copy(sam_sid
, &domain_sid
);
95 if (secrets_fetch_domain_sid(global_myname(), sam_sid
)) {
97 /* We got our sid. If not a pdc/bdc, we're done. */
101 if (!secrets_fetch_domain_sid(lp_workgroup(), &domain_sid
)) {
103 /* No domain sid and we're a pdc/bdc. Store it */
105 if (!secrets_store_domain_sid(lp_workgroup(), sam_sid
)) {
106 DEBUG(0,("pdb_generate_sam_sid: Can't store domain SID as a pdc/bdc.\n"));
113 if (!sid_equal(&domain_sid
, sam_sid
)) {
115 /* Domain name sid doesn't match global sam sid. Re-store domain sid as 'local' sid. */
117 DEBUG(0,("pdb_generate_sam_sid: Mismatched SIDs as a pdc/bdc.\n"));
118 if (!secrets_store_domain_sid(global_myname(), &domain_sid
)) {
119 DEBUG(0,("pdb_generate_sam_sid: Can't re-store domain SID for local sid as PDC/BDC.\n"));
130 /* check for an old MACHINE.SID file for backwards compatibility */
131 if (asprintf(&fname
, "%s/MACHINE.SID", lp_private_dir()) == -1) {
136 if (read_sid_from_file(fname
, sam_sid
)) {
137 /* remember it for future reference and unlink the old MACHINE.SID */
138 if (!secrets_store_domain_sid(global_myname(), sam_sid
)) {
139 DEBUG(0,("pdb_generate_sam_sid: Failed to store SID from file.\n"));
146 if (!secrets_store_domain_sid(lp_workgroup(), sam_sid
)) {
147 DEBUG(0,("pdb_generate_sam_sid: Failed to store domain SID from file.\n"));
154 /* Stored the old sid from MACHINE.SID successfully.*/
161 /* we don't have the SID in secrets.tdb, we will need to
162 generate one and save it */
163 generate_random_sid(sam_sid
);
165 if (!secrets_store_domain_sid(global_myname(), sam_sid
)) {
166 DEBUG(0,("pdb_generate_sam_sid: Failed to store generated machine SID.\n"));
171 if (!secrets_store_domain_sid(lp_workgroup(), sam_sid
)) {
172 DEBUG(0,("pdb_generate_sam_sid: Failed to store generated domain SID.\n"));
181 /* return our global_sam_sid */
182 DOM_SID
*get_global_sam_sid(void)
184 if (global_sam_sid
!= NULL
)
185 return global_sam_sid
;
187 /* memory for global_sam_sid is allocated in
188 pdb_generate_sam_sid() as needed */
190 if (!(global_sam_sid
= pdb_generate_sam_sid())) {
191 smb_panic("could not generate a machine SID");
194 return global_sam_sid
;
198 * Force get_global_sam_sid to requery the backends
200 void reset_global_sam_sid(void)
202 SAFE_FREE(global_sam_sid
);
205 /*****************************************************************
206 Check if the SID is our domain SID (S-1-5-21-x-y-z).
207 *****************************************************************/
209 bool sid_check_is_domain(const DOM_SID
*sid
)
211 return sid_equal(sid
, get_global_sam_sid());
214 /*****************************************************************
215 Check if the SID is our domain SID (S-1-5-21-x-y-z).
216 *****************************************************************/
218 bool sid_check_is_in_our_domain(const DOM_SID
*sid
)
223 sid_copy(&dom_sid
, sid
);
224 sid_split_rid(&dom_sid
, &rid
);
225 return sid_check_is_domain(&dom_sid
);