2 Unix SMB/Netbios implementation.
4 Samba utility functions
5 Copyright (C) Andrew Tridgell 1992-1998
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 extern int DEBUGLEVEL;
27 extern pstring global_myname;
30 * This is set on startup - it defines the SID for this
31 * machine, and therefore the SAM database for which it is
35 DOM_SID global_sam_sid;
38 * This is the name associated with the SAM database for
39 * which this machine is responsible. In the case of a PDC
40 * or PDC, this name is the same as the workgroup. In the
41 * case of "security = domain" mode, this is the same as
42 * the name of the server (global_myname).
45 fstring global_sam_name;
48 * This is obtained on startup - it defines the SID for which
49 * this machine is a member. It is therefore only set, and
50 * used, in "security = domain" mode.
53 DOM_SID global_member_sid;
56 * note the lack of a "global_member_name" - this is because
57 * this is the same as "global_myworkgroup".
64 DOM_SID global_sid_S_1_5_20; /* local well-known domain */
65 DOM_SID global_sid_S_1_1; /* everyone */
66 DOM_SID global_sid_S_1_3; /* */
67 DOM_SID global_sid_S_1_5; /* NT Authority */
69 extern pstring global_myworkgroup;
70 /* extern fstring global_member_dom_name; */
72 static struct sid_name_map_info
80 { &global_sid_S_1_5_20, "BUILTIN" },
81 { &global_sid_S_1_1 , "Everyone" },
82 { &global_sid_S_1_3 , "don't know" },
83 { &global_sid_S_1_5 , "NT Authority" },
84 { &global_sam_sid , global_sam_name },
85 { &global_member_sid , global_myworkgroup },
89 /****************************************************************************
90 Read the machine SID from a file.
91 ****************************************************************************/
93 static BOOL read_sid_from_file(int fd, char *sid_file)
98 memset(fline, '\0', sizeof(fline));
100 if (read(fd, fline, sizeof(fline) -1 ) < 0) {
101 DEBUG(0,("unable to read file %s. Error was %s\n",
102 sid_file, strerror(errno) ));
107 * Convert to the machine SID.
110 fline[sizeof(fline)-1] = '\0';
111 if (!string_to_sid( &global_sam_sid, fline)) {
112 DEBUG(0,("unable to generate machine SID.\n"));
116 sid_to_string(sid_str, &global_sam_sid);
117 DEBUG(5,("read_sid_from_file: sid %s\n", sid_str));
122 /****************************************************************************
123 sets up the name associated with the SAM database for which we are responsible
124 ****************************************************************************/
125 void get_sam_domain_name(void)
127 switch (lp_server_role())
129 case ROLE_DOMAIN_PDC:
130 case ROLE_DOMAIN_BDC:
132 /* we are PDC (or BDC) for a Domain */
133 fstrcpy(global_sam_name, lp_workgroup());
136 case ROLE_DOMAIN_MEMBER:
138 /* we are a "PDC", but FOR LOCAL SAM DATABASE ONLY */
139 fstrcpy(global_sam_name, global_myname);
144 /* no domain role, probably due to "security = share" */
145 memset(global_sam_name, 0, sizeof(global_sam_name));
151 /****************************************************************************
152 obtain the sid from the PDC. do some verification along the way...
153 ****************************************************************************/
154 BOOL get_member_domain_sid(void)
158 struct cli_state cli;
165 if (!cli_connect_serverlist(&cli, lp_passwordserver()))
167 DEBUG(0,("get_member_domain_sid: unable to initialise client connection.\n"));
172 * Ok - we have an anonymous connection to the IPC$ share.
173 * Now start the NT Domain stuff :-).
181 fstrcpy(srv_name, "\\\\");
182 fstrcat(srv_name, global_myname);
185 /* open LSARPC session. */
186 res = res ? cli_nt_session_open(&cli, PIPE_LSARPC) : False;
188 /* lookup domain controller; receive a policy handle */
189 res = res ? do_lsa_open_policy(&cli, srv_name, &pol, False) : False;
191 /* send client info query, level 3. receive domain name and sid */
192 res = res ? do_lsa_query_info_pol(&cli, &pol, 3, dom3, &sid3) : False;
194 /* send client info query, level 5. receive domain name and sid */
195 res = res ? do_lsa_query_info_pol(&cli, &pol, 5, dom5, &sid5) : False;
197 /* close policy handle */
198 res = res ? do_lsa_close(&cli, &pol) : False;
200 /* close the session */
201 cli_nt_session_close(&cli);
208 DEBUG(2,("LSA Query Info Policy\n"));
209 sid_to_string(sid, &sid3);
210 DEBUG(2,("Domain Member - Domain: %s SID: %s\n", dom3, sid));
211 sid_to_string(sid, &sid5);
212 DEBUG(2,("Domain Controller - Domain: %s SID: %s\n", dom5, sid));
214 if (!strequal(dom3, global_myworkgroup) ||
215 !strequal(dom5, global_myworkgroup))
217 DEBUG(0,("get_member_domain_sid: %s is a DC for %s not %s\n",
218 cli.desthost, dom5, global_myworkgroup));
224 DEBUG(1,("lsa query info failed\n"));
228 DEBUG(0,("get_member_domain_sid: unable to obtain Domain member SID\n"));
232 /* this is a _lot_ of trouble to go to for just this info: */
233 global_member_sid = sid5;
239 /****************************************************************************
240 creates some useful well known sids
241 ****************************************************************************/
242 void generate_wellknown_sids(void)
244 string_to_sid(&global_sid_S_1_5_20, "S-1-5-32");
245 string_to_sid(&global_sid_S_1_1 , "S-1-1" );
246 string_to_sid(&global_sid_S_1_3 , "S-1-3" );
247 string_to_sid(&global_sid_S_1_5 , "S-1-5" );
250 /****************************************************************************
251 Generate the global machine sid. Look for the MACHINE.SID file first, if
252 not found then look in smb.conf and use it to create the MACHINE.SID file.
253 ****************************************************************************/
254 BOOL generate_sam_sid(void)
262 uchar raw_sid_data[12];
264 pstrcpy(sid_file, lp_smb_passwd_file());
265 p = strrchr(sid_file, '/');
270 if (!directory_exist(sid_file, NULL)) {
271 if (dos_mkdir(sid_file, 0700) != 0) {
272 DEBUG(0,("can't create private directory %s : %s\n",
273 sid_file, strerror(errno)));
278 pstrcat(sid_file, "MACHINE.SID");
280 if ((fd = sys_open(sid_file, O_RDWR | O_CREAT, 0644)) == -1) {
281 DEBUG(0,("unable to open or create file %s. Error was %s\n",
282 sid_file, strerror(errno) ));
287 * Check if the file contains data.
290 if (sys_fstat( fd, &st) < 0) {
291 DEBUG(0,("unable to stat file %s. Error was %s\n",
292 sid_file, strerror(errno) ));
297 if (st.st_size > 0) {
299 * We have a valid SID - read it.
301 if (!read_sid_from_file( fd, sid_file)) {
302 DEBUG(0,("unable to read file %s. Error was %s\n",
303 sid_file, strerror(errno) ));
312 * Generate the new sid data & turn it into a string.
314 generate_random_buffer( raw_sid_data, 12, True);
316 fstrcpy( sid_string, "S-1-5-21");
317 for( i = 0; i < 3; i++) {
319 slprintf( tmp_string, sizeof(tmp_string) - 1, "-%u", IVAL(raw_sid_data, i*4));
320 fstrcat( sid_string, tmp_string);
323 fstrcat(sid_string, "\n");
326 * Ensure our new SID is valid.
329 if (!string_to_sid( &global_sam_sid, sid_string)) {
330 DEBUG(0,("unable to generate machine SID.\n"));
335 * Do an exclusive blocking lock on the file.
338 if (!do_file_lock( fd, 60, F_WRLCK)) {
339 DEBUG(0,("unable to lock file %s. Error was %s\n",
340 sid_file, strerror(errno) ));
346 * At this point we have a blocking lock on the SID
347 * file - check if in the meantime someone else wrote
348 * SID data into the file. If so - they were here first,
352 if (sys_fstat( fd, &st) < 0) {
353 DEBUG(0,("unable to stat file %s. Error was %s\n",
354 sid_file, strerror(errno) ));
359 if (st.st_size > 0) {
361 * Unlock as soon as possible to reduce
362 * contention on the exclusive lock.
364 do_file_lock( fd, 60, F_UNLCK);
367 * We have a valid SID - read it.
370 if (!read_sid_from_file( fd, sid_file)) {
371 DEBUG(0,("unable to read file %s. Error was %s\n",
372 sid_file, strerror(errno) ));
381 * The file is still empty and we have an exlusive lock on it.
382 * Write out out SID data into the file.
385 if (fchmod(fd, 0644) < 0) {
386 DEBUG(0,("unable to set correct permissions on file %s. \
387 Error was %s\n", sid_file, strerror(errno) ));
392 if (write( fd, sid_string, strlen(sid_string)) != strlen(sid_string)) {
393 DEBUG(0,("unable to write file %s. Error was %s\n",
394 sid_file, strerror(errno) ));
403 do_file_lock( fd, 60, F_UNLCK);
408 /**************************************************************************
409 turns a domain name into a SID.
411 *** side-effect: if the domain name is NULL, it is set to our domain ***
413 ***************************************************************************/
414 BOOL map_domain_name_to_sid(DOM_SID *sid, char **nt_domain)
417 sid_to_string(sid_str, sid);
418 DEBUG(5,("map_domain_name_to_sid: %s\n", sid_str));
420 if (nt_domain == NULL)
422 *sid = global_sam_sid;
426 if ((*nt_domain) == NULL)
428 DEBUG(5,("map_domain_name_to_sid: overriding NULL name to %s\n",
430 (*nt_domain) = strdup(global_sam_name);
431 *sid = global_sam_sid;
435 if (strequal((*nt_domain), global_sam_name))
437 *sid = global_sam_sid;
441 DEBUG(0,("map_domain_name_to_sid: mapping to %s NOT IMPLEMENTED\n",
446 /**************************************************************************
447 turns a domain SID into a name.
449 ***************************************************************************/
450 BOOL map_domain_sid_to_name(DOM_SID *sid, char *nt_domain)
454 sid_to_string(sid_str, sid);
456 DEBUG(5,("map_domain_sid_to_name: %s\n", sid_str));
458 if (nt_domain == NULL)
463 while (sid_name_map[i].sid != NULL)
465 sid_to_string(sid_str, sid_name_map[i].sid);
466 DEBUG(5,("compare: %s\n", sid_str));
467 if (sid_equal(sid_name_map[i].sid, sid))
469 fstrcpy(nt_domain, sid_name_map[i].name);
470 DEBUG(5,("found %s\n", nt_domain));
476 DEBUG(0,("map_domain_sid_to_name: mapping NOT IMPLEMENTED\n"));
481 /**************************************************************************
482 splits a name of format \DOMAIN\name into its two components.
483 sets the DOMAIN name to global_sam_name if it has not been specified.
484 ***************************************************************************/
485 BOOL split_domain_name(char *fullname, char *domain, char *name)
490 if (fullname == NULL || domain == NULL || name == NULL)
495 if (fullname[0] == '\\')
499 fstrcpy(full_name, fullname);
500 p = strchr(full_name+1, '\\');
505 fstrcpy(domain, full_name);
510 fstrcpy(domain, global_sam_name);
511 fstrcpy(name, full_name);
514 DEBUG(5,("name '%s' split into '\\%s\\%s'\n", fullname, domain, name));