335 lines
9.2 KiB
PHP
Executable file
335 lines
9.2 KiB
PHP
Executable file
#!/usr/bin/php
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<?php
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/*
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* ejabberd extauth script for the integration with friendica
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*
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* Originally written for joomla by Dalibor Karlovic <dado@krizevci.info>
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* modified for Friendica by Michael Vogel <icarus@dabo.de>
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* published under GPL
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*
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* Latest version of the original script for joomla is available at:
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* http://87.230.15.86/~dado/ejabberd/joomla-login
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*
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* Installation:
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*
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* - Change it's owner to whichever user is running the server, ie. ejabberd
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* $ chown ejabberd:ejabberd /path/to/friendica/include/auth_ejabberd.php
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*
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* - Change the access mode so it is readable only to the user ejabberd and has exec
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* $ chmod 700 /path/to/friendica/include/auth_ejabberd.php
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*
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* - Edit your ejabberd.cfg file, comment out your auth_method and add:
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* {auth_method, external}.
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* {extauth_program, "/path/to/friendica/include/auth_ejabberd.php"}.
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*
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* - Restart your ejabberd service, you should be able to login with your friendica auth info
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*
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* Other hints:
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* - if your users have a space or a @ in their nickname, they'll run into trouble
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* registering with any client so they should be instructed to replace these chars
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* " " (space) is replaced with "%20"
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* "@" is replaced with "(a)"
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*
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*/
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if (sizeof($_SERVER["argv"]) == 0)
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die();
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$directory = dirname($_SERVER["argv"][0]);
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if (substr($directory, 0, 1) != "/")
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$directory = $_SERVER["PWD"]."/".$directory;
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$directory = realpath($directory."/..");
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chdir($directory);
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require_once("boot.php");
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global $a, $db;
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if (is_null($a))
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$a = new App;
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if (is_null($db)) {
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@include(".htconfig.php");
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require_once("include/dba.php");
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$db = new dba($db_host, $db_user, $db_pass, $db_data);
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unset($db_host, $db_user, $db_pass, $db_data);
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};
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// the logfile to which to write, should be writeable by the user which is running the server
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$sLogFile = get_config('jabber','logfile');
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// set true to debug if needed
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$bDebug = get_config('jabber','debug');
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$oAuth = new exAuth($sLogFile, $bDebug);
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class exAuth {
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private $sLogFile;
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private $bDebug;
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private $rLogFile;
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/**
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* @brief Create the class and do the authentification studd
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*
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* @param string $sLogFile The logfile name
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* @param boolean $bDebug Debug mode
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*/
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public function __construct($sLogFile, $bDebug) {
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global $db;
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// setter
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$this->sLogFile = $sLogFile;
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$this->bDebug = $bDebug;
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// Open the logfile if the logfile name is defined
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if ($this->sLogFile != '')
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$this->rLogFile = fopen($this->sLogFile, "a") or die("Error opening log file: ". $this->sLogFile);
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$this->writeLog("[exAuth] start");
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// We are connected to the SQL server and are having a log file.
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do {
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// Quit if the database connection went down
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if (!$db->connected()) {
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$this->writeDebugLog("[debug] the database connection went down");
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return;
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}
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$iHeader = fgets(STDIN, 3);
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$aLength = unpack("n", $iHeader);
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$iLength = $aLength["1"];
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// No data? Then quit
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if ($iLength == 0) {
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$this->writeDebugLog("[debug] we got no data");
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return;
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}
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// Fetching the data
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$sData = fgets(STDIN, $iLength + 1);
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$this->writeDebugLog("[debug] received data: ". $sData);
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$aCommand = explode(":", $sData);
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if (is_array($aCommand)) {
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switch ($aCommand[0]) {
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case "isuser":
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// Check the existance of a given username
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$this->isuser($aCommand);
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break;
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case "auth":
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// Check if the givven password is correct
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$this->auth($aCommand);
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break;
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case "setpass":
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// We don't accept the setting of passwords here
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$this->writeLog("[exAuth] setpass command disabled");
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fwrite(STDOUT, pack("nn", 2, 0));
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break;
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default:
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// We don't know the given command
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$this->writeLog("[exAuth] unknown command ". $aCommand[0]);
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fwrite(STDOUT, pack("nn", 2, 0));
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break;
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}
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} else {
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$this->writeDebugLog("[debug] invalid command string");
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fwrite(STDOUT, pack("nn", 2, 0));
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}
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} while (true);
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}
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/**
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* @brief Check if the given username exists
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*
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* @param array $aCommand The command array
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*/
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private function isuser($aCommand) {
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$a = get_app();
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// Check if there is a username
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if (!isset($aCommand[1])) {
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$this->writeLog("[exAuth] invalid isuser command, no username given");
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fwrite(STDOUT, pack("nn", 2, 0));
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return;
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}
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// Now we check if the given user is valid
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$sUser = str_replace(array("%20", "(a)"), array(" ", "@"), $aCommand[1]);
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$this->writeDebugLog("[debug] checking isuser for ". $sUser."@".$aCommand[2]);
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// Does the hostname match? So we try directly
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if ($a->get_hostname() == $aCommand[2]) {
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$sQuery = "SELECT `uid` FROM `user` WHERE `nickname`='".dbesc($sUser)."'";
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$this->writeDebugLog("[debug] using query ". $sQuery);
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$r = q($sQuery);
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$found = dbm::is_result($r);
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} else {
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$found = false;
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}
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// If the hostnames doesn't match or there is some failure, we try to check remotely
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if (!$found) {
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$found = $this->check_user($aCommand[2], $aCommand[1], true);
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}
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if ($found) {
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// The user is okay
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$this->writeLog("[exAuth] valid user: ". $sUser);
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fwrite(STDOUT, pack("nn", 2, 1));
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} else {
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// The user isn't okay
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$this->writeLog("[exAuth] invalid user: ". $sUser);
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fwrite(STDOUT, pack("nn", 2, 0));
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}
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}
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/**
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* @brief Check remote user existance via HTTP(S)
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*
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* @param string $host The hostname
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* @param string $user Username
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* @param boolean $ssl Should the check be done via SSL?
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*
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* @return boolean Was the user found?
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*/
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private function check_user($host, $user, $ssl) {
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$url = ($ssl ? "https":"http")."://".$host."/noscrape/".$user;
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$data = z_fetch_url($url);
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if (!is_array($data))
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return(false);
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if ($data["return_code"] != "200")
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return(false);
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$json = @json_decode($data["body"]);
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if (!is_object($json))
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return(false);
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return($json->nick == $user);
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}
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/**
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* @brief Authenticate the givven user and password
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*
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* @param array $aCommand The command array
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*/
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private function auth($aCommand) {
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$a = get_app();
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// check user authentication
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if (sizeof($aCommand) != 4) {
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$this->writeLog("[exAuth] invalid auth command, data missing");
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fwrite(STDOUT, pack("nn", 2, 0));
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return;
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}
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// We now check if the password match
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$sUser = str_replace(array("%20", "(a)"), array(" ", "@"), $aCommand[1]);
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$this->writeDebugLog("[debug] doing auth for ".$sUser."@".$aCommand[2]);
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// Does the hostname match? So we try directly
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if ($a->get_hostname() == $aCommand[2]) {
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$sQuery = "SELECT `uid`, `password` FROM `user` WHERE `nickname`='".dbesc($sUser)."'";
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$this->writeDebugLog("[debug] using query ". $sQuery);
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if ($oResult = q($sQuery)) {
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$uid = $oResult[0]["uid"];
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$Error = ($oResult[0]["password"] != hash('whirlpool',$aCommand[3]));
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} else {
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$this->writeLog("[MySQL] invalid query: ". $sQuery);
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$Error = true;
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$uid = -1;
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}
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if ($Error) {
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$oConfig = q("SELECT `v` FROM `pconfig` WHERE `uid` = %d AND `cat` = 'xmpp' AND `k`='password' LIMIT 1;", intval($uid));
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$this->writeLog("[exAuth] got password ".$oConfig[0]["v"]);
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$Error = ($aCommand[3] != $oConfig[0]["v"]);
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}
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} else {
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$Error = true;
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}
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// If the hostnames doesn't match or there is some failure, we try to check remotely
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if ($Error) {
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$Error = !$this->check_credentials($aCommand[2], $aCommand[1], $aCommand[3], true);
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}
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if ($Error) {
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$this->writeLog("[exAuth] authentification failed for user ".$sUser."@". $aCommand[2]);
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fwrite(STDOUT, pack("nn", 2, 0));
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} else {
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$this->writeLog("[exAuth] authentificated user ".$sUser."@".$aCommand[2]);
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fwrite(STDOUT, pack("nn", 2, 1));
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}
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}
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/**
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* @brief Check remote credentials via HTTP(S)
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*
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* @param string $host The hostname
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* @param string $user Username
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* @param string $password Password
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* @param boolean $ssl Should the check be done via SSL?
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*
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* @return boolean Are the credentials okay?
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*/
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private function check_credentials($host, $user, $password, $ssl) {
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$this->writeDebugLog("[debug] check credentials for user ".$user." on ".$host);
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$url = ($ssl ? "https":"http")."://".$host."/api/account/verify_credentials.json";
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_URL, $url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
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curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
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curl_setopt($ch, CURLOPT_HEADER, true);
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curl_setopt($ch, CURLOPT_NOBODY, true);
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curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
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curl_setopt($ch, CURLOPT_USERPWD, $user.':'.$password);
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$header = curl_exec($ch);
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$curl_info = @curl_getinfo($ch);
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$http_code = $curl_info["http_code"];
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curl_close($ch);
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$this->writeDebugLog("[debug] got HTTP code ".$http_code);
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return ($http_code == 200);
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}
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/**
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* @brief write data to the logfile
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*
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* @param string $sMessage The logfile message
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*/
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private function writeLog($sMessage) {
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if (is_resource($this->rLogFile))
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fwrite($this->rLogFile, date("r")." ".$sMessage."\n");
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}
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/**
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* @brief write debug data to the logfile
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*
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* @param string $sMessage The logfile message
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*/
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private function writeDebugLog($sMessage) {
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if ($this->bDebug)
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$this->writeLog($sMessage);
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}
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/**
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* @brief destroy the class
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*/
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public function __destruct() {
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// close the log file
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$this->writeLog("[exAuth] stop");
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if (is_resource($this->rLogFile))
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fclose($this->rLogFile);
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}
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}
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?>
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