eJabberd with PHP extauth - php

Question

I'm trying to make a PHP extauth script, i configured extauth in ejabberd.cfg and give permission to auth.php file, the script is the following
#!/usr/bin/php
<?php
error_reporting(0);
$auth = new JabberAuth();
$auth->dbhost = "";
$auth->dbuser = "";
$auth->dbpass = "";
$auth->dbbase = "";
$auth->play(); // We simply start process !
class JabberAuth {
var $dbhost; /* MySQL server */
var $dbuser; /* MySQL user */
var $dbpass; /* MySQL password */
var $dbbase; /* MySQL database where users are stored */
var $debug = true;/* Debug mode */
var $debugfile = "/var/log/pipe-debug.log"; /* Debug output */
var $logging = true; /* Do we log requests ? */
var $logfile = "/var/log/pipe-log.log" ; /* Log file ... */
/*
* For both debug and logging, ejabberd have to be able to write.
*/
var $jabber_user; /* This is the jabber user passed to the script. filled by $this->command() */
var $jabber_pass; /* This is the jabber user password passed to the script. filled by $this->command() */
var $jabber_server; /* This is the jabber server passed to the script. filled by $this->command(). Useful for VirtualHosts */
var $jid; /* Simply the JID, if you need it, you have to fill. */
var $data; /* This is what SM component send to us. */
var $dateformat = "M d H:i:s"; /* Check date() for string format. */
var $command; /* This is the command sent ... */
var $mysock; /* MySQL connection ressource */
var $stdin; /* stdin file pointer */
var $stdout; /* stdout file pointer */
function JabberAuth()
{
#define_syslog_variables();
#openlog("pipe-auth", LOG_NDELAY, LOG_SYSLOG);
if($this->debug) {
#error_reporting(E_ALL);
#ini_set("log_errors", "1");
#ini_set("error_log", $this->debugfile);
}
$this->logg("Starting pipe-auth ..."); // We notice that it's starting ...
$this->openstd();
}
function stop()
{
$this->logg("Shutting down ..."); // Sorry, have to go ...
closelog();
$this->closestd(); // Simply close files
exit(0); // and exit cleanly
}
function openstd()
{
$this->stdout = #fopen("php://stdout", "w"); // We open STDOUT so we can read
$this->stdin = #fopen("php://stdin", "r"); // and STDIN so we can talk !
}
function readstdin()
{
$l = #fgets($this->stdin, 3); // We take the length of string
$length = #unpack("n", $l); // ejabberd give us something to play with ...
$len = $length["1"]; // and we now know how long to read.
if($len > 0) { // if not, we'll fill logfile ... and disk full is just funny once
$this->logg("Reading $len bytes ... "); // We notice ...
$data = #fgets($this->stdin, $len+1);
// $data = iconv("UTF-8", "ISO-8859-15", $data); // To be tested, not sure if still needed.
$this->data = $data; // We set what we got.
$this->logg("IN: ".$data);
}
}
function closestd()
{
#fclose($this->stdin); // We close everything ...
#fclose($this->stdout);
}
function out($message)
{
#fwrite($this->stdout, $message); // We reply ...
$dump = #unpack("nn", $message);
$dump = $dump["n"];
$this->logg("OUT: ". $dump);
}
function myalive()
{
if(!is_resource($this->mysock) || !#mysql_ping($this->mysock)) { // check if we have a MySQL connection and if it's valid.
$this->mysql(); // We try to reconnect if MySQL gone away ...
return #mysql_ping($this->mysock); // we simply try again, to be sure ...
} else {
return true; // so good !
}
}
function play()
{
do {
$this->readstdin(); // get data
$length = strlen($this->data); // compute data length
if($length > 0 ) { // for debug mainly ...
$this->logg("GO: ".$this->data);
$this->logg("data length is : ".$length);
}
$ret = $this->command(); // play with data !
$this->logg("RE: " . $ret); // this is what WE send.
$this->out($ret); // send what we reply.
$this->data = NULL; // more clean. ...
} while (true);
}
function command()
{
$data = $this->splitcomm(); // This is an array, where each node is part of what SM sent to us :
// 0 => the command,
// and the others are arguments .. e.g. : user, server, password ...
if($this->myalive()) { // Check we can play with MySQL
if(strlen($data[0]) > 0 ) {
$this->logg("Command was : ".$data[0]);
}
switch($data[0]) {
case "isuser": // this is the "isuser" command, used to check for user existance
$this->jabber_user = $data[1];
$parms = $data[1]; // only for logging purpose
$return = $this->checkuser();
break;
case "auth": // check login, password
$this->jabber_user = $data[1];
$this->jabber_pass = $data[3];
$parms = $data[1].":".$data[2].":".md5($data[3]); // only for logging purpose
$return = $this->checkpass();
break;
case "setpass":
$return = false; // We do not want jabber to be able to change password
break;
default:
$this->stop(); // if it's not something known, we have to leave.
// never had a problem with this using ejabberd, but might lead to problem ?
break;
}
$return = ($return) ? 1 : 0;
if(strlen($data[0]) > 0 && strlen($parms) > 0) {
$this->logg("Command : ".$data[0].":".$parms." ==> ".$return." ");
}
return #pack("nn", 2, $return);
} else {
// $this->prevenir(); // Maybe useful to tell somewhere there's a problem ...
return #pack("nn", 2, 0); // it's so bad.
}
}
function checkpass()
{
/*
* Put here your code to check password
* $this->jabber_user
* $this->jabber_pass
* $this->jabber_server
*/
return true;
}
function checkuser()
{
/*
* Put here your code to check user
* $this->jabber_user
* $this->jabber_pass
* $this->jabber_server
*/
return true;
}
function splitcomm() // simply split command and arugments into an array.
{
return explode(":", $this->data);
}
function mysql() // "MySQL abstraction", this opens a permanent MySQL connection, and fill the ressource
{
$this->mysock = #mysql_pconnect($this->dbhost, $this->dbuser, $this->dbpass);
#mysql_select_db($this->dbbase, $this->mysock);
$this->logg("MySQL :: ". (is_resource($this->mysock) ? "Connecté" : "Déconnecté"));
}
function logg($message) // pretty simple, using syslog.
// some says it doesn't work ? perhaps, but AFAIR, it was working.
{
if($this->logging) {
#syslog(LOG_INFO, $message);
}
}
}
?>
when i start ejabberd live, i get this error in an infinite loop:
extauth script has exitted abruptly with reason 'normal'

Answer 1

External authentication script needs to be constantly running and thus must be a loop.
This is explained in ejabberd documentation:
https://www.ejabberd.im/files/doc/dev.html#htoc9
I suspect your script is exiting and not actually looping.
As a starting point, you should have a look at this project:
https://github.com/cburschka/ejabberd-auth-php