2 backend code for provisioning a Samba4 server
3 Copyright Andrew Tridgell 2005
4 Released under the GNU GPL v2 or later
7 /* used to generate sequence numbers for records */
8 provision_next_usn = 1;
13 return true if the current install seems to be OK
15 function install_ok(session_info, credentials)
17 var lp = loadparm_init();
19 ldb.session_info = session_info;
20 ldb.credentials = credentials;
21 if (lp.get("realm") == "") {
24 var ok = ldb.connect(lp.get("sam database"));
28 var res = ldb.search("(cn=Administrator)");
29 if (res.length != 1) {
36 find a user or group from a list of possibilities
41 assert(arguments.length >= 2);
42 var nssfn = arguments[0];
43 for (i=1;i<arguments.length;i++) {
44 if (nssfn(arguments[i]) != undefined) {
48 printf("Unable to find user/group for %s\n", arguments[1]);
49 assert(i<arguments.length);
53 add a foreign security principle
55 function add_foreign(ldb, subobj, sid, desc)
58 dn: CN=%s,CN=ForeignSecurityPrincipals,%s
60 objectClass: foreignSecurityPrincipal
65 sid, subobj.BASEDN, desc);
66 /* deliberately ignore errors from this, as the records may
73 setup a mapping between a sam name and a unix name
75 function setup_name_mapping(info, ldb, sid, unixname)
77 var attrs = new Array("dn");
78 var res = ldb.search(sprintf("objectSid=%s", sid),
79 NULL, ldb.SCOPE_DEFAULT, attrs);
80 if (res.length != 1) {
81 info.message("Failed to find record for objectSid %s\n", sid);
91 var ok = ldb.modify(mod);
93 info.message("name mapping for %s failed - %s\n",
94 sid, ldb.errstring());
101 return current time as a nt time string
105 return "" + sys.nttime();
109 return current time as a ldap time string
113 return sys.ldaptime(sys.nttime());
117 return a date string suitable for a dns zone serial number
119 function datestring()
121 var t = sys.gmtime(sys.nttime());
122 return sprintf("%04u%02u%02u%02u",
123 t.tm_year+1900, t.tm_mon+1, t.tm_mday, t.tm_hour);
131 var list = sys.interfaces();
136 return next USN in the sequence
140 provision_next_usn = provision_next_usn+1;
141 return provision_next_usn;
145 return first part of hostname
149 var s = split(".", sys.hostname());
154 /* the ldb is in bad shape, possibly due to being built from an
155 incompatible previous version of the code, so delete it
157 function ldb_delete(ldb)
159 println("Deleting " + ldb.filename);
160 var lp = loadparm_init();
161 sys.unlink(sprintf("%s/%s", lp.get("private dir"), ldb.filename));
162 ldb.transaction_cancel();
164 var ok = ldb.connect(ldb.filename);
165 ldb.transaction_start();
170 erase an ldb, removing all records
172 function ldb_erase(ldb)
174 var attrs = new Array("dn");
176 /* delete the specials */
177 ldb.del("@INDEXLIST");
178 ldb.del("@ATTRIBUTES");
179 ldb.del("@SUBCLASSES");
183 var res = ldb.search("(&(|(objectclass=*)(dn=*))(!(dn=@BASEINFO)))", attrs);
185 if (typeof(res) == "undefined") {
189 for (i=0;i<res.length;i++) {
192 /* extra hack to ensure it's gone on remote ldap */
193 ldb.del("cn=ROOTDSE");
195 var res = ldb.search("(&(|(objectclass=*)(dn=*))(!(dn=@BASEINFO)))", attrs);
196 if (res.length != 0) {
200 assert(res.length == 0);
204 setup a ldb in the private dir
206 function setup_ldb(ldif, info, dbname)
210 var ldb = ldb_init();
211 var lp = loadparm_init();
212 ldb.session_info = info.session_info;
213 ldb.credentials = info.credentials;
215 if (arguments.length >= 4) {
216 extra = arguments[3];
219 if (arguments.length == 5) {
220 erase = arguments[4];
223 var src = lp.get("setup directory") + "/" + ldif;
225 var data = sys.file_load(src);
227 data = substitute_var(data, info.subobj);
229 ldb.filename = dbname;
231 var connect_ok = ldb.connect(dbname);
234 ldb.transaction_start();
240 var add_ok = ldb.add(data);
242 info.message("ldb load failed: " + ldb.errstring() + "\n");
245 var commit_ok = ldb.transaction_commit();
247 info.message("ldb commit failed: " + ldb.errstring() + "\n");
253 setup a file in the private dir
255 function setup_file(template, fname, subobj)
257 var lp = loadparm_init();
259 var src = lp.get("setup directory") + "/" + template;
263 var data = sys.file_load(src);
264 data = substitute_var(data, subobj);
266 ok = sys.file_save(f, data);
270 function provision_default_paths(subobj)
272 var lp = loadparm_init();
273 var paths = new Object();
274 paths.smbconf = lp.get("config file");
275 paths.hklm = "hklm.ldb";
276 paths.hkcu = "hkcu.ldb";
277 paths.hkcr = "hkcr.ldb";
278 paths.hku = "hku.ldb";
279 paths.hkpd = "hkpd.ldb";
280 paths.hkpt = "hkpt.ldb";
281 paths.samdb = lp.get("sam database");
282 paths.secrets = "secrets.ldb";
283 paths.dns = lp.get("private dir") + "/" + subobj.DNSDOMAIN + ".zone";
284 paths.winsdb = "wins.ldb";
290 setup reasonable name mappings for sam names to unix names
292 function setup_name_mappings(info, subobj, session_info, credentials)
294 var lp = loadparm_init();
295 var ldb = ldb_init();
296 ldb.session_info = session_info;
297 ldb.credentials = credentials;
298 var ok = ldb.connect(lp.get("sam database"));
302 var attrs = new Array("objectSid");
303 var res = ldb.search("dnsDomain=" + subobj.REALM,
304 NULL, ldb.SCOPE_DEFAULT, attrs);
305 if (res.length != 1) {
306 info.message("Failed to find dnsDomain %s\n", subobj.REALM);
309 var sid = res[0].objectSid;
311 /* add some foreign sids if they are not present already */
312 add_foreign(ldb, subobj, "S-1-5-7", "Anonymous");
313 add_foreign(ldb, subobj, "S-1-1-0", "World");
314 add_foreign(ldb, subobj, "S-1-5-2", "Network");
315 add_foreign(ldb, subobj, "S-1-5-18", "System");
316 add_foreign(ldb, subobj, "S-1-5-11", "Authenticated Users");
318 /* some well known sids */
319 setup_name_mapping(info, ldb, "S-1-5-7", subobj.NOBODY);
320 setup_name_mapping(info, ldb, "S-1-1-0", subobj.NOGROUP);
321 setup_name_mapping(info, ldb, "S-1-5-2", subobj.NOGROUP);
322 setup_name_mapping(info, ldb, "S-1-5-18", subobj.ROOT);
323 setup_name_mapping(info, ldb, "S-1-5-11", subobj.USERS);
324 setup_name_mapping(info, ldb, "S-1-5-32-544", subobj.WHEEL);
325 setup_name_mapping(info, ldb, "S-1-5-32-546", subobj.NOGROUP);
326 setup_name_mapping(info, ldb, "S-1-5-32-551", subobj.BACKUP);
328 /* and some well known domain rids */
329 setup_name_mapping(info, ldb, sid + "-500", subobj.ROOT);
330 setup_name_mapping(info, ldb, sid + "-518", subobj.WHEEL);
331 setup_name_mapping(info, ldb, sid + "-519", subobj.WHEEL);
332 setup_name_mapping(info, ldb, sid + "-512", subobj.WHEEL);
333 setup_name_mapping(info, ldb, sid + "-513", subobj.USERS);
334 setup_name_mapping(info, ldb, sid + "-520", subobj.WHEEL);
341 provision samba4 - caution, this wipes all existing data!
343 function provision(subobj, message, blank, paths, session_info, credentials)
346 var lp = loadparm_init();
347 var sys = sys_init();
348 var info = new Object();
351 some options need to be upper/lower case
353 subobj.REALM = strupper(subobj.REALM);
354 subobj.HOSTNAME = strlower(subobj.HOSTNAME);
355 subobj.DOMAIN = strupper(subobj.DOMAIN);
356 assert(valid_netbios_name(subobj.DOMAIN));
357 subobj.NETBIOSNAME = strupper(subobj.HOSTNAME);
358 assert(valid_netbios_name(subobj.NETBIOSNAME));
359 var rdns = split(",", subobj.BASEDN);
360 subobj.RDN_DC = substr(rdns[0], strlen("DC="));
362 provision_next_usn = 1;
364 info.subobj = subobj;
365 info.message = message;
366 info.credentials = credentials;
367 info.session_info = session_info;
369 /* only install a new smb.conf if there isn't one there already */
370 var st = sys.stat(paths.smbconf);
371 if (st == undefined) {
372 message("Setting up smb.conf\n");
373 setup_file("provision.smb.conf", paths.smbconf, subobj);
376 message("Setting up secrets.ldb\n");
377 setup_ldb("secrets.ldif", info, paths.secrets);
378 message("Setting up keytabs\n");
379 var keytab_ok = credentials_update_all_keytabs();
381 message("Setting up hklm.ldb\n");
382 setup_ldb("hklm.ldif", info, paths.hklm);
385 message("Setting up sam.ldb attributes\n");
386 setup_ldb("provision_init.ldif", info, paths.samdb);
387 message("Setting up sam.ldb schema\n");
388 setup_ldb("schema.ldif", info, paths.samdb, NULL, false);
389 message("Setting up display specifiers\n");
390 setup_ldb("display_specifiers.ldif", info, paths.samdb, NULL, false);
391 message("Setting up sam.ldb templates\n");
392 setup_ldb("provision_templates.ldif", info, paths.samdb, NULL, false);
393 message("Setting up sam.ldb data\n");
394 setup_ldb("provision.ldif", info, paths.samdb, NULL, false);
396 if (blank != false) {
400 message("Setting up sam.ldb users and groups\n");
401 setup_ldb("provision_users.ldif", info, paths.samdb, data, false);
403 if (setup_name_mappings(info, subobj, session_info, credentials) == false) {
410 /* Write out a DNS zone file, from the info in the current database */
411 function provision_dns(subobj, message, paths, session_info, credentials)
413 message("Setting up DNS zone: " + subobj.DNSDOMAIN + " \n");
414 var ldb = ldb_init();
415 ldb.session_info = session_info;
416 ldb.credentials = credentials;
418 /* connect to the sam */
419 var ok = ldb.connect(paths.samdb);
422 /* These values may have changed, due to an incoming SamSync, so fetch them from the database */
423 subobj.DOMAINGUID = searchone(ldb, "(&(objectClass=domainDNS)(dnsDomain=" + subobj.DNSDOMAIN + "))", "objectGUID");
424 assert(subobj.DOMAINGUID != undefined);
426 subobj.HOSTGUID = searchone(ldb, "(&(objectClass=computer)(cn=" + subobj.NETBIOSNAME + "))", "objectGUID");
427 assert(subobj.HOSTGUID != undefined);
429 setup_file("provision.zone",
433 message("Please install the zone located in " + paths.dns + " into your DNS server\n");
437 guess reasonably default options for provisioning
439 function provision_guess()
441 var subobj = new Object();
442 var nss = nss_init();
443 var lp = loadparm_init();
447 subobj.REALM = strupper(lp.get("realm"));
448 subobj.DOMAIN = lp.get("workgroup");
449 subobj.HOSTNAME = hostname();
451 assert(subobj.REALM);
452 assert(subobj.DOMAIN);
453 assert(subobj.HOSTNAME);
455 subobj.HOSTIP = hostip();
456 subobj.DOMAINGUID = randguid();
457 subobj.DOMAINSID = randsid();
458 subobj.HOSTGUID = randguid();
459 subobj.INVOCATIONID = randguid();
460 subobj.KRBTGTPASS = randpass(12);
461 subobj.MACHINEPASS = randpass(12);
462 subobj.ADMINPASS = randpass(12);
463 subobj.DEFAULTSITE = "Default-First-Site-Name";
464 subobj.NEWGUID = randguid;
465 subobj.NTTIME = nttime;
466 subobj.LDAPTIME = ldaptime;
467 subobj.DATESTRING = datestring;
468 subobj.USN = nextusn;
469 subobj.ROOT = findnss(nss.getpwnam, "root");
470 subobj.NOBODY = findnss(nss.getpwnam, "nobody");
471 subobj.NOGROUP = findnss(nss.getgrnam, "nogroup", "nobody");
472 subobj.WHEEL = findnss(nss.getgrnam, "wheel", "root", "staff");
473 subobj.BACKUP = findnss(nss.getgrnam, "backup", "wheel", "root", "staff");
474 subobj.USERS = findnss(nss.getgrnam, "users", "guest", "other");
475 subobj.DNSDOMAIN = strlower(subobj.REALM);
476 subobj.DNSNAME = sprintf("%s.%s",
477 strlower(subobj.HOSTNAME),
479 rdn_list = split(".", subobj.DNSDOMAIN);
480 subobj.BASEDN = "DC=" + join(",DC=", rdn_list);
485 search for one attribute as a string
487 function searchone(ldb, expression, attribute)
489 var attrs = new Array(attribute);
490 res = ldb.search(expression, attrs);
491 if (res.length != 1 ||
492 res[0][attribute] == undefined) {
495 return res[0][attribute];
499 modify an account to remove the
501 function enable_account(ldb, user_dn)
503 var attrs = new Array("userAccountControl");
504 var res = ldb.search(NULL, user_dn, ldb.SCOPE_ONELEVEL, attrs);
505 assert(res.length == 1);
506 var userAccountControl = res[0].userAccountControl;
507 userAccountControl = userAccountControl - 2; /* remove disabled bit */
511 replace: userAccountControl
512 userAccountControl: %u
514 user_dn, userAccountControl);
515 var ok = ldb.modify(mod);
521 add a new user record
523 function newuser(username, unixname, password, message, session_info, credentials)
525 var lp = loadparm_init();
526 var samdb = lp.get("sam database");
527 var ldb = ldb_init();
529 ldb.session_info = session_info;
530 ldb.credentials = credentials;
532 /* connect to the sam */
533 var ok = ldb.connect(samdb);
536 ldb.transaction_start();
538 /* find the DNs for the domain and the domain users group */
539 var domain_dn = searchone(ldb, "objectClass=domainDNS", "dn");
540 assert(domain_dn != undefined);
541 var dom_users = searchone(ldb, "name=Domain Users", "dn");
542 assert(dom_users != undefined);
544 var user_dn = sprintf("CN=%s,CN=Users,%s", username, domain_dn);
548 the new user record. note the reliance on the samdb module to fill
559 user_dn, username, dom_users,
562 add the user to the users group as well
564 var modgroup = sprintf("
576 message("Adding user %s\n", user_dn);
579 message("Failed to add %s - %s\n", user_dn, ldb.errstring());
583 message("Modifying group %s\n", dom_users);
584 ok = ldb.modify(modgroup);
586 message("Failed to modify %s - %s\n", dom_users, ldb.errstring());
591 modify the userAccountControl to remove the disabled bit
593 ok = enable_account(ldb, user_dn);
595 ldb.transaction_commit();
600 // Check whether a name is valid as a NetBIOS name.
601 // FIXME: There are probably more constraints here.
602 // crh has a paragraph on this in his book (1.4.1.1)
603 function valid_netbios_name(name)
605 if (strlen(name) > 13) return false;
609 function provision_validate(subobj, message)
611 var lp = loadparm_init();
613 if (!valid_netbios_name(subobj.DOMAIN)) {
614 message("Invalid NetBIOS name for domain\n");
618 if (!valid_netbios_name(subobj.NETBIOSNAME)) {
619 message("Invalid NetBIOS name for host\n");
624 if (strupper(lp.get("workgroup")) != strupper(subobj.DOMAIN)) {
625 message("workgroup '%s' in smb.conf must match chosen domain '%s'\n",
626 lp.get("workgroup"), subobj.DOMAIN);
630 if (strupper(lp.get("realm")) != strupper(subobj.REALM)) {
631 message("realm '%s' in smb.conf must match chosen realm '%s'\n",
632 lp.get("realm"), subobj.REALM);
639 function join_domain(domain, netbios_name, join_type, creds, message)
641 var ctx = NetContext(creds);
642 var joindom = new Object();
643 joindom.domain = domain;
644 joindom.join_type = join_type;
645 joindom.netbios_name = netbios_name;
646 if (!ctx.JoinDomain(joindom)) {
647 message("Domain Join failed: " + joindom.error_string);
653 /* Vampire a remote domain. Session info and credentials are required for for
654 * access to our local database (might be remote ldap)
657 function vampire(domain, session_info, credentials, message) {
658 var ctx = NetContext(credentials);
659 var vampire_ctx = new Object();
660 var machine_creds = credentials_init();
661 machine_creds.set_domain(form.DOMAIN);
662 if (!machine_creds.set_machine_account()) {
663 message("Failed to access domain join information!");
666 vampire_ctx.machine_creds = machine_creds;
667 vampire_ctx.session_info = session_info;
668 if (!ctx.SamSyncLdb(vampire_ctx)) {
669 message("Migration of remote domain to Samba failed: " + vampire_ctx.error_string);