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/*
backend code for provisioning a Samba4 server
Copyright Andrew Tridgell 2005
Released under the GNU GPL v2 or later
*/
/* used to generate sequence numbers for records */
provision_next_usn = 1;
sys = sys_init();
/*
return true if the current install seems to be OK
*/
function install_ok()
{
var lp = loadparm_init();
var ldb = ldb_init();
if (lp.get("realm") == "") {
return false;
}
var ok = ldb.connect(lp.get("sam database"));
if (!ok) {
return false;
}
var res = ldb.search("(name=Administrator)");
if (res.length != 1) {
return false;
}
return true;
}
/*
find a user or group from a list of possibilities
*/
function findnss()
{
var i;
assert(arguments.length >= 2);
var nssfn = arguments[0];
for (i=1;i<arguments.length;i++) {
if (nssfn(arguments[i]) != undefined) {
return arguments[i];
}
}
printf("Unable to find user/group for %s\n", arguments[1]);
assert(i<arguments.length);
}
/*
add a foreign security principle
*/
function add_foreign(str, sid, desc, unixname)
{
var add = "
dn: CN=${SID},CN=ForeignSecurityPrincipals,${BASEDN}
objectClass: top
objectClass: foreignSecurityPrincipal
description: ${DESC}
unixName: ${UNIXNAME}
uSNCreated: 1
uSNChanged: 1
";
var sub = new Object();
sub.SID = sid;
sub.DESC = desc;
sub.UNIXNAME = unixname;
return str + substitute_var(add, sub);
}
/*
return current time as a nt time string
*/
function nttime()
{
return "" + sys.nttime();
}
/*
return current time as a ldap time string
*/
function ldaptime()
{
return sys.ldaptime(sys.nttime());
}
/*
return a date string suitable for a dns zone serial number
*/
function datestring()
{
var t = sys.gmtime(sys.nttime());
return sprintf("%04u%02u%02u%02u",
t.tm_year+1900, t.tm_mon+1, t.tm_mday, t.tm_hour);
}
/*
return first host IP
*/
function hostip()
{
var list = sys.interfaces();
return list[0];
}
/*
return next USN in the sequence
*/
function nextusn()
{
provision_next_usn = provision_next_usn+1;
return provision_next_usn;
}
/*
return first part of hostname
*/
function hostname()
{
var s = split(".", sys.hostname());
return s[0];
}
/* the ldb is in bad shape, possibly due to being built from an
incompatible previous version of the code, so delete it
completely */
function ldb_delete(ldb)
{
println("Deleting " + ldb.filename);
var lp = loadparm_init();
sys.unlink(sprintf("%s/%s", lp.get("private dir"), ldb.filename));
ldb.transaction_cancel();
ldb.close();
var ok = ldb.connect(ldb.filename);
ldb.transaction_start();
assert(ok);
}
/*
erase an ldb, removing all records
*/
function ldb_erase(ldb)
{
var attrs = new Array("dn");
/* delete the specials */
ldb.del("@INDEXLIST");
ldb.del("@ATTRIBUTES");
ldb.del("@SUBCLASSES");
ldb.del("@MODULES");
/* and the rest */
var res = ldb.search("(&(|(objectclass=*)(dn=*))(!(dn=@BASEINFO)))", attrs);
var i;
if (typeof(res) == "undefined") {
ldb_delete(ldb);
return;
}
for (i=0;i<res.length;i++) {
ldb.del(res[i].dn);
}
/* extra hack to ensure it's gone on remote ldap */
ldb.del("cn=ROOTDSE");
var res = ldb.search("(&(|(objectclass=*)(dn=*))(!(dn=@BASEINFO)))", attrs);
if (res.length != 0) {
ldb_delete(ldb);
return;
}
assert(res.length == 0);
}
/*
setup a ldb in the private dir
*/
function setup_ldb(ldif, dbname, subobj)
{
var erase = true;
var extra = "";
var ldb = ldb_init();
var lp = loadparm_init();
if (arguments.length >= 4) {
extra = arguments[3];
}
if (arguments.length == 5) {
erase = arguments[4];
}
var src = lp.get("setup directory") + "/" + ldif;
var data = sys.file_load(src);
data = data + extra;
data = substitute_var(data, subobj);
ldb.filename = dbname;
var connect_ok = ldb.connect(dbname);
assert(connect_ok);
ldb.transaction_start();
if (erase) {
ldb_erase(ldb);
}
var add_ok = ldb.add(data);
if (!add_ok) {
message("ldb load failed: " + ldb.errstring() + "\n");
assert(add_ok);
}
var commit_ok = ldb.transaction_commit();
if (!commit_ok) {
message("ldb commit failed: " + ldb.errstring() + "\n");
assert(add_ok);
}
}
/*
setup a file in the private dir
*/
function setup_file(template, fname, subobj)
{
var lp = loadparm_init();
var f = fname;
var src = lp.get("setup directory") + "/" + template;
sys.unlink(f);
var data = sys.file_load(src);
data = substitute_var(data, subobj);
ok = sys.file_save(f, data);
assert(ok);
}
function provision_default_paths(subobj)
{
var lp = loadparm_init();
var paths = new Object();
paths.smbconf = lp.get("config file");
paths.hklm = "hklm.ldb";
paths.hkcu = "hkcu.ldb";
paths.hkcr = "hkcr.ldb";
paths.hku = "hku.ldb";
paths.hkpd = "hkpd.ldb";
paths.hkpt = "hkpt.ldb";
paths.samdb = lp.get("sam database");
paths.secrets = "secrets.ldb";
paths.dns = lp.get("private dir") + "/" + subobj.DNSDOMAIN + ".zone";
paths.winsdb = "wins.ldb";
return paths;
}
/*
provision samba4 - caution, this wipes all existing data!
*/
function provision(subobj, message, blank, paths)
{
var data = "";
var lp = loadparm_init();
var sys = sys_init();
/*
some options need to be upper/lower case
*/
subobj.REALM = strupper(subobj.REALM);
subobj.HOSTNAME = strlower(subobj.HOSTNAME);
subobj.DOMAIN = strupper(subobj.DOMAIN);
assert(valid_netbios_name(subobj.DOMAIN));
subobj.NETBIOSNAME = strupper(subobj.HOSTNAME);
assert(valid_netbios_name(subobj.NETBIOSNAME));
var rdns = split(",", subobj.BASEDN);
subobj.RDN_DC = substr(rdns[0], strlen("DC="));
data = add_foreign(data, "S-1-5-7", "Anonymous", "${NOBODY}");
data = add_foreign(data, "S-1-1-0", "World", "${NOGROUP}");
data = add_foreign(data, "S-1-5-2", "Network", "${NOGROUP}");
data = add_foreign(data, "S-1-5-18", "System", "${ROOT}");
data = add_foreign(data, "S-1-5-11", "Authenticated Users", "${USERS}");
provision_next_usn = 1;
/* only install a new smb.conf if there isn't one there already */
var st = sys.stat(paths.smbconf);
if (st == undefined) {
message("Setting up smb.conf\n");
setup_file("provision.smb.conf", paths.smbconf, subobj);
lp.reload();
}
message("Setting up secrets.ldb\n");
setup_ldb("secrets.ldif", paths.secrets, subobj);
message("Setting up DNS zone file\n");
setup_file("provision.zone",
paths.dns,
subobj);
message("Setting up keytabs\n");
var keytab_ok = credentials_update_all_keytabs();
assert(keytab_ok);
message("Setting up hklm.ldb\n");
setup_ldb("hklm.ldif", paths.hklm, subobj);
message("Setting up sam.ldb attributes\n");
setup_ldb("provision_init.ldif", paths.samdb, subobj);
message("Setting up sam.ldb schema\n");
setup_ldb("schema.ldif", paths.samdb, subobj, NULL, false);
message("Setting up display specifiers\n");
setup_ldb("display_specifiers.ldif", paths.samdb, subobj, NULL, false);
message("Setting up sam.ldb templates\n");
setup_ldb("provision_templates.ldif", paths.samdb, subobj, NULL, false);
message("Setting up sam.ldb data\n");
setup_ldb("provision.ldif", paths.samdb, subobj, NULL, false);
if (blank == false) {
message("Setting up sam.ldb users and groups\n");
setup_ldb("provision_users.ldif", paths.samdb, subobj, data, false);
}
}
/*
guess reasonably default options for provisioning
*/
function provision_guess()
{
var subobj = new Object();
var nss = nss_init();
var lp = loadparm_init();
var rdn_list;
random_init(local);
subobj.REALM = strupper(lp.get("realm"));
subobj.DOMAIN = lp.get("workgroup");
subobj.HOSTNAME = hostname();
assert(subobj.REALM);
assert(subobj.DOMAIN);
assert(subobj.HOSTNAME);
subobj.HOSTIP = hostip();
subobj.DOMAINGUID = randguid();
subobj.DOMAINSID = randsid();
subobj.HOSTGUID = randguid();
subobj.INVOCATIONID = randguid();
subobj.KRBTGTPASS = randpass(12);
subobj.MACHINEPASS = randpass(12);
subobj.ADMINPASS = randpass(12);
subobj.DEFAULTSITE = "Default-First-Site-Name";
subobj.NEWGUID = randguid;
subobj.NTTIME = nttime;
subobj.LDAPTIME = ldaptime;
subobj.DATESTRING = datestring;
subobj.USN = nextusn;
subobj.ROOT = findnss(nss.getpwnam, "root");
subobj.NOBODY = findnss(nss.getpwnam, "nobody");
subobj.NOGROUP = findnss(nss.getgrnam, "nogroup", "nobody");
subobj.WHEEL = findnss(nss.getgrnam, "wheel", "root", "staff");
subobj.USERS = findnss(nss.getgrnam, "users", "guest", "other");
subobj.DNSDOMAIN = strlower(subobj.REALM);
subobj.DNSNAME = sprintf("%s.%s",
strlower(subobj.HOSTNAME),
subobj.DNSDOMAIN);
rdn_list = split(".", subobj.DNSDOMAIN);
subobj.BASEDN = "DC=" + join(",DC=", rdn_list);
return subobj;
}
/*
search for one attribute as a string
*/
function searchone(ldb, expression, attribute)
{
var attrs = new Array(attribute);
res = ldb.search(expression, attrs);
if (res.length != 1 ||
res[0][attribute] == undefined) {
return undefined;
}
return res[0][attribute];
}
/*
modify an account to remove the
*/
function enable_account(ldb, user_dn)
{
var attrs = new Array("userAccountControl");
var res = ldb.search(NULL, user_dn, ldb.SCOPE_ONELEVEL, attrs);
assert(res.length == 1);
var userAccountControl = res[0].userAccountControl;
userAccountControl = userAccountControl - 2; /* remove disabled bit */
var mod = sprintf("
dn: %s
changetype: modify
replace: userAccountControl
userAccountControl: %u
",
user_dn, userAccountControl);
var ok = ldb.modify(mod);
return ok;
}
/*
add a new user record
*/
function newuser(username, unixname, password, message)
{
var lp = loadparm_init();
var samdb = lp.get("sam database");
var ldb = ldb_init();
random_init(local);
/* connect to the sam */
var ok = ldb.connect(samdb);
assert(ok);
ldb.transaction_start();
/* find the DNs for the domain and the domain users group */
var domain_dn = searchone(ldb, "objectClass=domainDNS", "dn");
assert(domain_dn != undefined);
var dom_users = searchone(ldb, "name=Domain Users", "dn");
assert(dom_users != undefined);
var user_dn = sprintf("CN=%s,CN=Users,%s", username, domain_dn);
/*
the new user record. note the reliance on the samdb module to fill
in a sid, guid etc
*/
var ldif = sprintf("
dn: %s
sAMAccountName: %s
name: %s
memberOf: %s
unixName: %s
objectGUID: %s
unicodePwd: %s
objectClass: user
",
user_dn, username, username, dom_users,
unixname, randguid(), password);
/*
add the user to the users group as well
*/
var modgroup = sprintf("
dn: %s
changetype: modify
add: member
member: %s
",
dom_users, user_dn);
/*
now the real work
*/
message("Adding user %s\n", user_dn);
ok = ldb.add(ldif);
if (ok != true) {
message("Failed to add %s - %s\n", user_dn, ldb.errstring());
return false;
}
message("Modifying group %s\n", dom_users);
ok = ldb.modify(modgroup);
if (ok != true) {
message("Failed to modify %s - %s\n", dom_users, ldb.errstring());
return false;
}
/*
modify the userAccountControl to remove the disabled bit
*/
ok = enable_account(ldb, user_dn);
if (ok) {
ldb.transaction_commit();
}
return ok;
}
// Check whether a name is valid as a NetBIOS name.
// FIXME: There are probably more constraints here
function valid_netbios_name(name)
{
if (strlen(name) > 13) return false;
if (strstr(name, ".")) return false;
return true;
}
function provision_validate(subobj, message)
{
if (!valid_netbios_name(subobj.DOMAIN)) {
message("Invalid NetBIOS name for domain\n");
return false;
}
if (!valid_netbios_name(subobj.NETBIOSNAME)) {
message("Invalid NetBIOS name for host\n");
return false;
}
return true;
}
return 0;
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