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#!/usr/bin/env smbscript
/*
	provision a Samba4 server
	Copyright Andrew Tridgell 2005
	Released under the GNU GPL v2 or later
*/

options = new Object();
ok = GetOptions(ARGV, options, 
		"POPT_AUTOHELP",
		"POPT_COMMON_SAMBA",
		"POPT_COMMON_VERSION",
		'realm=s',
		'domain=s',
		'domain-guid=s',
		'domain-sid=s',
		'host-name=s',
		'host-ip=s',
		'host-guid=s',
		'invocationid=s',
		'adminpass=s',
		'krbtgtpass=s',
		'machinepass=s',
		'root=s',
		'nobody=s',
		'nogroup=s',
		'wheel=s',
		'users=s',
		'outputdir=s',
		'quiet');
if (ok == false) {
   println("Failed to parse options: " + options.ERROR);
   return -1;
}

libinclude("base.js");

/*
  print a message if quiet is not set
*/
function message(s) 
{
	if (options["quiet"] == undefined) {
		println(s);
	}
}

/*
  find a username from a list of possibilities
*/
function finduser()
{
	var i, name = arguments[0];
	if (options[name] != undefined) {
		return options[name];
	}
	for (i=1;i<arguments.length;i++) {
		if (getpwnam(arguments[i]) != undefined) {
			return arguments[i];
		}
	}
	println("Unable to find user for " + name);
	exit(1);
}

/*
  find a group from a list of possibilities
*/
function findgroup()
{
	var i, name = arguments[0];
	if (options[name] != undefined) {
		return options[name];
	}
	for (i=1;i<arguments.length;i++) {
		if (getgrnam(arguments[i]) != undefined) {
			return arguments[i];
		}
	}
	println("Unable to find group for " + name);
	exit(1);
}

/*
  return a variable substitution
*/
function sub_callback(key)
{
	var lkey = strlower(key);
	if (options[lkey] != undefined) {
		return options[lkey];
	}
	println(key);
	return "NOTFOUND{" + key + "}";
}


/*
   add a foreign security principle
 */
function add_foreign(str, sid, desc, unixname)
{
	return str + "
dn: CN=$sid,CN=ForeignSecurityPrincipals,${BASEDN}
objectClass: top
objectClass: foreignSecurityPrincipal
cn: $sid
description: $desc
instanceType: 4
whenCreated: ${LDAPTIME}
whenChanged: ${LDAPTIME}
uSNCreated: 1
uSNChanged: 1
showInAdvancedViewOnly: TRUE
name: $sid
objectGUID: ${NEWGUID}
objectSid: $sid
objectCategory: CN=Foreign-Security-Principal,CN=Schema,CN=Configuration,${BASEDN}
unixName: $unixname

";
}

/*
  generate a random guid
*/
function randguid()
{
	return "009876-7656";
}

/*
  generate a random sid
*/
function randsid()
{
	return "1-2-3";
}

/*
  generate a random password
*/
function randpass()
{
	return "penguin";
}

/*
  return current time as a nt time string
*/
function nttime()
{
	return "1st Feb";
}

/*
  substitute strings of the form ${NAME} in str, replacing
  with substitutions from subobj
*/
function substitute_var(str)
{
	var list = split("${", str);
	var i;
	for (i=1;i<list.length;i++) {
		var list2 = split("}", list[i]);
		if (list2.length < 2) {
			return undefined;
		}
		var key = list2[0];
		if (typeof(subobj[key]) == "string") {
			list2[0] = subobj[key];
		} else {
			println("KEY=" + key);
			var fn = subobj[key];
			list2[0] = fn();
			println("list2fn=" + list2[0]);
		}
		list[i] = join("", list2);
		println("XXX[" + key + "]=" + list[i]);
	}
	return join("", list);
}

/*
 show some help
*/
function ShowHelp()
{
	print("
Samba4 provisioning

provision.pl [options]
 --realm	REALM		set realm
 --domain	DOMAIN		set domain
 --domain-guid	GUID		set domainguid (otherwise random)
 --domain-sid	SID		set domainsid (otherwise random)
 --host-name	HOSTNAME	set hostname
 --host-ip	IPADDRESS	set ipaddress
 --host-guid	GUID		set hostguid (otherwise random)
 --invocationid	GUID		set invocationid (otherwise random)
 --outputdir	OUTPUTDIR	set output directory
 --adminpass	PASSWORD	choose admin password (otherwise random)
 --krbtgtpass	PASSWORD	choose krbtgt password (otherwise random)
 --machinepass	PASSWORD	choose machine password (otherwise random)
 --root         USERNAME	choose 'root' unix username
 --nobody	USERNAME	choose 'nobody' user
 --nogroup	GROUPNAME	choose 'nogroup' group
 --wheel	GROUPNAME	choose 'wheel' privileged group
 --users	GROUPNAME	choose 'users' group
 --quiet			Be quiet

You must provide at least a realm and domain

");
	exit(1);
}

/*
   main program
*/
if (options["realm"] == undefined ||
    options["domain"] == undefined ||
    options["host-name"] == undefined) {
	ShowHelp();
}

options.realm        = strlower(options.realm);
options['host-name'] = strlower(options['host-name']);
options.domain       = strupper(options.domain);
options.netbiosname  = strupper(options.hostname);

if (options.hostip == undefined) {
	var list = IfaceList();
	options.hostip = list[0];
}

message("Provisioning for " + options.domain + " in realm " + options.realm);

options.root    = finduser("root", "root");
options.nobody  = finduser("nobody", "nobody");
options.nogroup = findgroup("nogroup", "nogroup", "nobody");
options.wheel   = findgroup("wheel", "wheel", "root");
options.users   = findgroup("users", "users", "guest", "other");


options.dnsdomain = strlower(options.realm);
options.dnsname   = strlower(options['host-name']) + "." + options.dnsdomain;
options.basedn    = "DC=" + join(",DC=", split(".", options.realm));

var data = FileLoad("setup/provision.ldif");
if (data == undefined) {
	println("Unable to load provision.ldif");
	exit(1);
}

/*
  setup the substitution object
*/
subobj = new Object();
subobj.DOMAINGUID   = randguid();
subobj.DOMAINSID    = randsid();
subobj.HOSTGUID     = randguid();
subobj.INVOCATIONID = randguid();
subobj.KRBTGTPASS   = randpass();
subobj.MACHINEPASS  = randpass();
subobj.ADMINPASS    = randpass();
subobj.DEFAULTSITE  = "Default-First-Site-Name";
subobj.NEWGUID      = randguid;
subobj.NTTIME       = nttime;
for (r in options) {
	subobj[strupper(join("", split("-", r)))] = options[r];
}
printVars(subobj);

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}");

newdata = substitute_var(data);

print(newdata);
return 0;