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 2 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 ****************************************************************************/
38 static BOOL read_sid_from_file(const char *fname, DOM_SID *sid)
44 lines = file_lines_load(fname, &numlines);
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)
86 if(!(sam_sid=SMB_MALLOC_P(DOM_SID)))
89 switch (lp_server_role()) {
100 if (secrets_fetch_domain_sid(lp_workgroup(), &domain_sid)) {
101 sid_copy(sam_sid, &domain_sid);
106 if (secrets_fetch_domain_sid(global_myname(), sam_sid)) {
108 /* We got our sid. If not a pdc/bdc, we're done. */
112 if (!secrets_fetch_domain_sid(lp_workgroup(), &domain_sid)) {
114 /* No domain sid and we're a pdc/bdc. Store it */
116 if (!secrets_store_domain_sid(lp_workgroup(), sam_sid)) {
117 DEBUG(0,("pdb_generate_sam_sid: Can't store domain SID as a pdc/bdc.\n"));
124 if (!sid_equal(&domain_sid, sam_sid)) {
126 /* Domain name sid doesn't match global sam sid. Re-store domain sid as 'local' sid. */
128 DEBUG(0,("pdb_generate_sam_sid: Mismatched SIDs as a pdc/bdc.\n"));
129 if (!secrets_store_domain_sid(global_myname(), &domain_sid)) {
130 DEBUG(0,("pdb_generate_sam_sid: Can't re-store domain SID for local sid as PDC/BDC.\n"));
141 /* check for an old MACHINE.SID file for backwards compatibility */
142 asprintf(&fname, "%s/MACHINE.SID", lp_private_dir());
144 if (read_sid_from_file(fname, sam_sid)) {
145 /* remember it for future reference and unlink the old MACHINE.SID */
146 if (!secrets_store_domain_sid(global_myname(), sam_sid)) {
147 DEBUG(0,("pdb_generate_sam_sid: Failed to store SID from file.\n"));
154 if (!secrets_store_domain_sid(lp_workgroup(), sam_sid)) {
155 DEBUG(0,("pdb_generate_sam_sid: Failed to store domain SID from file.\n"));
162 /* Stored the old sid from MACHINE.SID successfully.*/
169 /* we don't have the SID in secrets.tdb, we will need to
170 generate one and save it */
171 generate_random_sid(sam_sid);
173 if (!secrets_store_domain_sid(global_myname(), sam_sid)) {
174 DEBUG(0,("pdb_generate_sam_sid: Failed to store generated machine SID.\n"));
179 if (!secrets_store_domain_sid(lp_workgroup(), sam_sid)) {
180 DEBUG(0,("pdb_generate_sam_sid: Failed to store generated domain SID.\n"));
189 /* return our global_sam_sid */
190 DOM_SID *get_global_sam_sid(void)
192 if (global_sam_sid != NULL)
193 return global_sam_sid;
195 /* memory for global_sam_sid is allocated in
196 pdb_generate_sam_sid() as needed */
198 if (!(global_sam_sid = pdb_generate_sam_sid())) {
199 smb_panic("Could not generate a machine SID\n");
202 return global_sam_sid;
206 * Force get_global_sam_sid to requery the backends
208 void reset_global_sam_sid(void)
210 SAFE_FREE(global_sam_sid);