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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 /* NOTE! the global_sam_sid is the SID of our local SAM. This is only
27 equal to the domain SID when we are a DC, otherwise its our
29 static DOM_SID *global_sam_sid=NULL;
32 #define DBGC_CLASS DBGC_PASSDB
34 /****************************************************************************
35 Read a SID from a file. This is for compatibility with the old MACHINE.SID
37 ****************************************************************************/
39 static BOOL read_sid_from_file(const char *fname, DOM_SID *sid)
45 lines = file_lines_load(fname, &numlines,0);
47 if (!lines || numlines < 1) {
48 if (lines) file_lines_free(lines);
52 ret = string_to_sid(sid, lines[0]);
53 file_lines_free(lines);
58 generate a random sid - used to build our own sid if we don't have one
60 static void generate_random_sid(DOM_SID *sid)
63 uchar raw_sid_data[12];
65 memset((char *)sid, '\0', sizeof(*sid));
69 sid->sub_auths[sid->num_auths++] = 21;
71 generate_random_buffer(raw_sid_data, 12);
72 for (i = 0; i < 3; i++)
73 sid->sub_auths[sid->num_auths++] = IVAL(raw_sid_data, i*4);
76 /****************************************************************************
77 Generate the global machine sid.
78 ****************************************************************************/
80 static DOM_SID *pdb_generate_sam_sid(void)
86 if(!(sam_sid=SMB_MALLOC_P(DOM_SID)))
90 if (secrets_fetch_domain_sid(lp_workgroup(), &domain_sid)) {
91 sid_copy(sam_sid, &domain_sid);
96 if (secrets_fetch_domain_sid(global_myname(), sam_sid)) {
98 /* We got our sid. If not a pdc/bdc, we're done. */
102 if (!secrets_fetch_domain_sid(lp_workgroup(), &domain_sid)) {
104 /* No domain sid and we're a pdc/bdc. Store it */
106 if (!secrets_store_domain_sid(lp_workgroup(), sam_sid)) {
107 DEBUG(0,("pdb_generate_sam_sid: Can't store domain SID as a pdc/bdc.\n"));
114 if (!sid_equal(&domain_sid, sam_sid)) {
116 /* Domain name sid doesn't match global sam sid. Re-store domain sid as 'local' sid. */
118 DEBUG(0,("pdb_generate_sam_sid: Mismatched SIDs as a pdc/bdc.\n"));
119 if (!secrets_store_domain_sid(global_myname(), &domain_sid)) {
120 DEBUG(0,("pdb_generate_sam_sid: Can't re-store domain SID for local sid as PDC/BDC.\n"));
131 /* check for an old MACHINE.SID file for backwards compatibility */
132 asprintf(&fname, "%s/MACHINE.SID", lp_private_dir());
134 if (read_sid_from_file(fname, sam_sid)) {
135 /* remember it for future reference and unlink the old MACHINE.SID */
136 if (!secrets_store_domain_sid(global_myname(), sam_sid)) {
137 DEBUG(0,("pdb_generate_sam_sid: Failed to store SID from file.\n"));
144 if (!secrets_store_domain_sid(lp_workgroup(), sam_sid)) {
145 DEBUG(0,("pdb_generate_sam_sid: Failed to store domain SID from file.\n"));
152 /* Stored the old sid from MACHINE.SID successfully.*/
159 /* we don't have the SID in secrets.tdb, we will need to
160 generate one and save it */
161 generate_random_sid(sam_sid);
163 if (!secrets_store_domain_sid(global_myname(), sam_sid)) {
164 DEBUG(0,("pdb_generate_sam_sid: Failed to store generated machine SID.\n"));
169 if (!secrets_store_domain_sid(lp_workgroup(), sam_sid)) {
170 DEBUG(0,("pdb_generate_sam_sid: Failed to store generated domain SID.\n"));
179 /* return our global_sam_sid */
180 DOM_SID *get_global_sam_sid(void)
182 if (global_sam_sid != NULL)
183 return global_sam_sid;
185 /* memory for global_sam_sid is allocated in
186 pdb_generate_sam_sid() as needed */
188 if (!(global_sam_sid = pdb_generate_sam_sid())) {
189 smb_panic("could not generate a machine SID");
192 return global_sam_sid;
196 * Force get_global_sam_sid to requery the backends
198 void reset_global_sam_sid(void)
200 SAFE_FREE(global_sam_sid);
203 /*****************************************************************
204 Check if the SID is our domain SID (S-1-5-21-x-y-z).
205 *****************************************************************/
207 BOOL sid_check_is_domain(const DOM_SID *sid)
209 return sid_equal(sid, get_global_sam_sid());
212 /*****************************************************************
213 Check if the SID is our domain SID (S-1-5-21-x-y-z).
214 *****************************************************************/
216 BOOL sid_check_is_in_our_domain(const DOM_SID *sid)
221 sid_copy(&dom_sid, sid);
222 sid_split_rid(&dom_sid, &rid);
223 return sid_check_is_domain(&dom_sid);