xref: /dokuwiki/inc/auth.php (revision e03f8da34f265d1085e18bec8aa6cd627179cbef) 
1<?php
2/**
3 * Authentication library
4 *
5 * Including this file will automatically try to login
6 * a user by calling auth_login()
7 *
8 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
9 * @author     Andreas Gohr <andi@splitbrain.org>
10 */
11
12if(!defined('DOKU_INC')) die('meh.');
13
14// some ACL level defines
15define('AUTH_NONE',0);
16define('AUTH_READ',1);
17define('AUTH_EDIT',2);
18define('AUTH_CREATE',4);
19define('AUTH_UPLOAD',8);
20define('AUTH_DELETE',16);
21define('AUTH_ADMIN',255);
22
23/**
24 * Initialize the auth system.
25 *
26 * This function is automatically called at the end of init.php
27 *
28 * This used to be the main() of the auth.php
29 *
30 * @todo backend loading maybe should be handled by the class autoloader
31 * @todo maybe split into multiple functions at the XXX marked positions
32 */
33function auth_setup(){
34    global $conf;
35    global $auth;
36    global $AUTH_ACL;
37    global $lang;
38    global $config_cascade;
39    $AUTH_ACL = array();
40
41    if(!$conf['useacl']) return false;
42
43    // load the the backend auth functions and instantiate the auth object XXX
44    if (@file_exists(DOKU_INC.'inc/auth/'.$conf['authtype'].'.class.php')) {
45        require_once(DOKU_INC.'inc/auth/basic.class.php');
46        require_once(DOKU_INC.'inc/auth/'.$conf['authtype'].'.class.php');
47
48        $auth_class = "auth_".$conf['authtype'];
49        if (class_exists($auth_class)) {
50            $auth = new $auth_class();
51            if ($auth->success == false) {
52                // degrade to unauthenticated user
53                unset($auth);
54                auth_logoff();
55                msg($lang['authtempfail'], -1);
56            }
57        } else {
58            nice_die($lang['authmodfailed']);
59        }
60    } else {
61        nice_die($lang['authmodfailed']);
62    }
63
64    if(!$auth) return;
65
66    // do the login either by cookie or provided credentials XXX
67    if (!isset($_REQUEST['u'])) $_REQUEST['u'] = '';
68    if (!isset($_REQUEST['p'])) $_REQUEST['p'] = '';
69    if (!isset($_REQUEST['r'])) $_REQUEST['r'] = '';
70    $_REQUEST['http_credentials'] = false;
71    if (!$conf['rememberme']) $_REQUEST['r'] = false;
72
73    // streamline HTTP auth credentials (IIS/rewrite -> mod_php)
74    if(isset($_SERVER['HTTP_AUTHORIZATION'])){
75        list($_SERVER['PHP_AUTH_USER'],$_SERVER['PHP_AUTH_PW']) =
76            explode(':', base64_decode(substr($_SERVER['HTTP_AUTHORIZATION'], 6)));
77    }
78
79    // if no credentials were given try to use HTTP auth (for SSO)
80    if(empty($_REQUEST['u']) && empty($_COOKIE[DOKU_COOKIE]) && !empty($_SERVER['PHP_AUTH_USER'])){
81        $_REQUEST['u'] = $_SERVER['PHP_AUTH_USER'];
82        $_REQUEST['p'] = $_SERVER['PHP_AUTH_PW'];
83        $_REQUEST['http_credentials'] = true;
84    }
85
86    // apply cleaning
87    $_REQUEST['u'] = $auth->cleanUser($_REQUEST['u']);
88
89    if(isset($_REQUEST['authtok'])){
90        // when an authentication token is given, trust the session
91        auth_validateToken($_REQUEST['authtok']);
92    }elseif(!is_null($auth) && $auth->canDo('external')){
93        // external trust mechanism in place
94        $auth->trustExternal($_REQUEST['u'],$_REQUEST['p'],$_REQUEST['r']);
95    }else{
96        $evdata = array(
97                'user'     => $_REQUEST['u'],
98                'password' => $_REQUEST['p'],
99                'sticky'   => $_REQUEST['r'],
100                'silent'   => $_REQUEST['http_credentials'],
101                );
102        trigger_event('AUTH_LOGIN_CHECK', $evdata, 'auth_login_wrapper');
103    }
104
105    //load ACL into a global array XXX
106    if(is_readable($config_cascade['acl']['default'])){
107        $AUTH_ACL = file($config_cascade['acl']['default']);
108        //support user wildcard
109        if(isset($_SERVER['REMOTE_USER'])){
110            $AUTH_ACL = str_replace('%USER%',$_SERVER['REMOTE_USER'],$AUTH_ACL);
111        }
112    }
113}
114
115function auth_login_wrapper($evdata) {
116    return auth_login($evdata['user'],
117                      $evdata['password'],
118                      $evdata['sticky'],
119                      $evdata['silent']);
120}
121
122/**
123 * This tries to login the user based on the sent auth credentials
124 *
125 * The authentication works like this: if a username was given
126 * a new login is assumed and user/password are checked. If they
127 * are correct the password is encrypted with blowfish and stored
128 * together with the username in a cookie - the same info is stored
129 * in the session, too. Additonally a browserID is stored in the
130 * session.
131 *
132 * If no username was given the cookie is checked: if the username,
133 * crypted password and browserID match between session and cookie
134 * no further testing is done and the user is accepted
135 *
136 * If a cookie was found but no session info was availabe the
137 * blowfish encrypted password from the cookie is decrypted and
138 * together with username rechecked by calling this function again.
139 *
140 * On a successful login $_SERVER[REMOTE_USER] and $USERINFO
141 * are set.
142 *
143 * @author  Andreas Gohr <andi@splitbrain.org>
144 *
145 * @param   string  $user    Username
146 * @param   string  $pass    Cleartext Password
147 * @param   bool    $sticky  Cookie should not expire
148 * @param   bool    $silent  Don't show error on bad auth
149 * @return  bool             true on successful auth
150 */
151function auth_login($user,$pass,$sticky=false,$silent=false){
152    global $USERINFO;
153    global $conf;
154    global $lang;
155    global $auth;
156    $sticky ? $sticky = true : $sticky = false; //sanity check
157
158    if (!$auth) return false;
159
160    if(!empty($user)){
161        //usual login
162        if ($auth->checkPass($user,$pass)){
163            // make logininfo globally available
164            $_SERVER['REMOTE_USER'] = $user;
165            auth_setCookie($user,PMA_blowfish_encrypt($pass,auth_cookiesalt()),$sticky);
166            return true;
167        }else{
168            //invalid credentials - log off
169            if(!$silent) msg($lang['badlogin'],-1);
170            auth_logoff();
171            return false;
172        }
173    }else{
174        // read cookie information
175        list($user,$sticky,$pass) = auth_getCookie();
176        // get session info
177        $session = $_SESSION[DOKU_COOKIE]['auth'];
178        if($user && $pass){
179            // we got a cookie - see if we can trust it
180            if(isset($session) &&
181                    $auth->useSessionCache($user) &&
182                    ($session['time'] >= time()-$conf['auth_security_timeout']) &&
183                    ($session['user'] == $user) &&
184                    ($session['pass'] == $pass) &&  //still crypted
185                    ($session['buid'] == auth_browseruid()) ){
186                // he has session, cookie and browser right - let him in
187                $_SERVER['REMOTE_USER'] = $user;
188                $USERINFO = $session['info']; //FIXME move all references to session
189                return true;
190            }
191            // no we don't trust it yet - recheck pass but silent
192            $pass = PMA_blowfish_decrypt($pass,auth_cookiesalt());
193            return auth_login($user,$pass,$sticky,true);
194        }
195    }
196    //just to be sure
197    auth_logoff(true);
198    return false;
199}
200
201/**
202 * Checks if a given authentication token was stored in the session
203 *
204 * Will setup authentication data using data from the session if the
205 * token is correct. Will exit with a 401 Status if not.
206 *
207 * @author Andreas Gohr <andi@splitbrain.org>
208 * @param  string $token The authentication token
209 * @return boolean true (or will exit on failure)
210 */
211function auth_validateToken($token){
212    if(!$token || $token != $_SESSION[DOKU_COOKIE]['auth']['token']){
213        // bad token
214        header("HTTP/1.0 401 Unauthorized");
215        print 'Invalid auth token - maybe the session timed out';
216        unset($_SESSION[DOKU_COOKIE]['auth']['token']); // no second chance
217        exit;
218    }
219    // still here? trust the session data
220    global $USERINFO;
221    $_SERVER['REMOTE_USER'] = $_SESSION[DOKU_COOKIE]['auth']['user'];
222    $USERINFO = $_SESSION[DOKU_COOKIE]['auth']['info'];
223    return true;
224}
225
226/**
227 * Create an auth token and store it in the session
228 *
229 * NOTE: this is completely unrelated to the getSecurityToken() function
230 *
231 * @author Andreas Gohr <andi@splitbrain.org>
232 * @return string The auth token
233 */
234function auth_createToken(){
235    $token = md5(mt_rand());
236    @session_start(); // reopen the session if needed
237    $_SESSION[DOKU_COOKIE]['auth']['token'] = $token;
238    session_write_close();
239    return $token;
240}
241
242/**
243 * Builds a pseudo UID from browser and IP data
244 *
245 * This is neither unique nor unfakable - still it adds some
246 * security. Using the first part of the IP makes sure
247 * proxy farms like AOLs are stil okay.
248 *
249 * @author  Andreas Gohr <andi@splitbrain.org>
250 *
251 * @return  string  a MD5 sum of various browser headers
252 */
253function auth_browseruid(){
254    $ip   = clientIP(true);
255    $uid  = '';
256    $uid .= $_SERVER['HTTP_USER_AGENT'];
257    $uid .= $_SERVER['HTTP_ACCEPT_ENCODING'];
258    $uid .= $_SERVER['HTTP_ACCEPT_LANGUAGE'];
259    $uid .= $_SERVER['HTTP_ACCEPT_CHARSET'];
260    $uid .= substr($ip,0,strpos($ip,'.'));
261    return md5($uid);
262}
263
264/**
265 * Creates a random key to encrypt the password in cookies
266 *
267 * This function tries to read the password for encrypting
268 * cookies from $conf['metadir'].'/_htcookiesalt'
269 * if no such file is found a random key is created and
270 * and stored in this file.
271 *
272 * @author  Andreas Gohr <andi@splitbrain.org>
273 *
274 * @return  string
275 */
276function auth_cookiesalt(){
277    global $conf;
278    $file = $conf['metadir'].'/_htcookiesalt';
279    $salt = io_readFile($file);
280    if(empty($salt)){
281        $salt = uniqid(rand(),true);
282        io_saveFile($file,$salt);
283    }
284    return $salt;
285}
286
287/**
288 * Log out the current user
289 *
290 * This clears all authentication data and thus log the user
291 * off. It also clears session data.
292 *
293 * @author  Andreas Gohr <andi@splitbrain.org>
294 * @param bool $keepbc - when true, the breadcrumb data is not cleared
295 */
296function auth_logoff($keepbc=false){
297    global $conf;
298    global $USERINFO;
299    global $INFO, $ID;
300    global $auth;
301
302    // make sure the session is writable (it usually is)
303    @session_start();
304
305    if(isset($_SESSION[DOKU_COOKIE]['auth']['user']))
306        unset($_SESSION[DOKU_COOKIE]['auth']['user']);
307    if(isset($_SESSION[DOKU_COOKIE]['auth']['pass']))
308        unset($_SESSION[DOKU_COOKIE]['auth']['pass']);
309    if(isset($_SESSION[DOKU_COOKIE]['auth']['info']))
310        unset($_SESSION[DOKU_COOKIE]['auth']['info']);
311    if(!$keepbc && isset($_SESSION[DOKU_COOKIE]['bc']))
312        unset($_SESSION[DOKU_COOKIE]['bc']);
313    if(isset($_SERVER['REMOTE_USER']))
314        unset($_SERVER['REMOTE_USER']);
315    $USERINFO=null; //FIXME
316
317    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
318        setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
319    }else{
320        setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
321    }
322
323    if($auth) $auth->logOff();
324}
325
326/**
327 * Check if a user is a manager
328 *
329 * Should usually be called without any parameters to check the current
330 * user.
331 *
332 * The info is available through $INFO['ismanager'], too
333 *
334 * @author Andreas Gohr <andi@splitbrain.org>
335 * @see    auth_isadmin
336 * @param  string user      - Username
337 * @param  array  groups    - List of groups the user is in
338 * @param  bool   adminonly - when true checks if user is admin
339 */
340function auth_ismanager($user=null,$groups=null,$adminonly=false){
341    global $conf;
342    global $USERINFO;
343    global $auth;
344
345    if (!$auth) return false;
346    if(is_null($user)) {
347        if (!isset($_SERVER['REMOTE_USER'])) {
348            return false;
349        } else {
350            $user = $_SERVER['REMOTE_USER'];
351        }
352    }
353    $user = $auth->cleanUser($user);
354    if(is_null($groups)) $groups = (array) $USERINFO['grps'];
355    $groups = array_map(array($auth,'cleanGroup'),$groups);
356    $user   = auth_nameencode($user);
357
358    // check username against superuser and manager
359    $superusers = explode(',', $conf['superuser']);
360    $superusers = array_unique($superusers);
361    $superusers = array_map('trim', $superusers);
362    // prepare an array containing only true values for array_map call
363    $alltrue = array_fill(0, count($superusers), true);
364    $superusers = array_map('auth_nameencode', $superusers, $alltrue);
365
366    // case insensitive?
367    if(!$auth->isCaseSensitive()){
368        $superusers = array_map('utf8_strtolower',$superusers);
369        $user       = utf8_strtolower($user);
370    }
371
372    // check user match
373    if(in_array($user, $superusers)) return true;
374
375    // check managers
376    if(!$adminonly){
377        $managers = explode(',', $conf['manager']);
378        $managers = array_unique($managers);
379        $managers = array_map('trim', $managers);
380        // prepare an array containing only true values for array_map call
381        $alltrue = array_fill(0, count($managers), true);
382        $managers = array_map('auth_nameencode', $managers, $alltrue);
383        if(!$auth->isCaseSensitive()) $managers = array_map('utf8_strtolower',$managers);
384        if(in_array($user, $managers)) return true;
385    }
386
387    // check user's groups against superuser and manager
388    if (!empty($groups)) {
389
390        //prepend groups with @ and nameencode
391        $cnt = count($groups);
392        for($i=0; $i<$cnt; $i++){
393            $groups[$i] = '@'.auth_nameencode($groups[$i]);
394            if(!$auth->isCaseSensitive()){
395                $groups[$i] = utf8_strtolower($groups[$i]);
396            }
397        }
398
399        // check groups against superuser and manager
400        foreach($superusers as $supu)
401            if(in_array($supu, $groups)) return true;
402        if(!$adminonly){
403            foreach($managers as $mana)
404                if(in_array($mana, $groups)) return true;
405        }
406    }
407
408    return false;
409}
410
411/**
412 * Check if a user is admin
413 *
414 * Alias to auth_ismanager with adminonly=true
415 *
416 * The info is available through $INFO['isadmin'], too
417 *
418 * @author Andreas Gohr <andi@splitbrain.org>
419 * @see auth_ismanager
420 */
421function auth_isadmin($user=null,$groups=null){
422    return auth_ismanager($user,$groups,true);
423}
424
425/**
426 * Convinience function for auth_aclcheck()
427 *
428 * This checks the permissions for the current user
429 *
430 * @author  Andreas Gohr <andi@splitbrain.org>
431 *
432 * @param  string  $id  page ID (needs to be resolved and cleaned)
433 * @return int          permission level
434 */
435function auth_quickaclcheck($id){
436    global $conf;
437    global $USERINFO;
438    # if no ACL is used always return upload rights
439    if(!$conf['useacl']) return AUTH_UPLOAD;
440    return auth_aclcheck($id,$_SERVER['REMOTE_USER'],$USERINFO['grps']);
441}
442
443/**
444 * Returns the maximum rights a user has for
445 * the given ID or its namespace
446 *
447 * @author  Andreas Gohr <andi@splitbrain.org>
448 *
449 * @param  string  $id     page ID (needs to be resolved and cleaned)
450 * @param  string  $user   Username
451 * @param  array   $groups Array of groups the user is in
452 * @return int             permission level
453 */
454function auth_aclcheck($id,$user,$groups){
455    global $conf;
456    global $AUTH_ACL;
457    global $auth;
458
459    // if no ACL is used always return upload rights
460    if(!$conf['useacl']) return AUTH_UPLOAD;
461    if (!$auth) return AUTH_NONE;
462
463    //make sure groups is an array
464    if(!is_array($groups)) $groups = array();
465
466    //if user is superuser or in superusergroup return 255 (acl_admin)
467    if(auth_isadmin($user,$groups)) { return AUTH_ADMIN; }
468
469    $ci = '';
470    if(!$auth->isCaseSensitive()) $ci = 'ui';
471
472    $user = $auth->cleanUser($user);
473    $groups = array_map(array($auth,'cleanGroup'),(array)$groups);
474    $user = auth_nameencode($user);
475
476    //prepend groups with @ and nameencode
477    $cnt = count($groups);
478    for($i=0; $i<$cnt; $i++){
479        $groups[$i] = '@'.auth_nameencode($groups[$i]);
480    }
481
482    $ns    = getNS($id);
483    $perm  = -1;
484
485    if($user || count($groups)){
486        //add ALL group
487        $groups[] = '@ALL';
488        //add User
489        if($user) $groups[] = $user;
490        //build regexp
491        $regexp   = join('|',$groups);
492    }else{
493        $regexp = '@ALL';
494    }
495
496    //check exact match first
497    $matches = preg_grep('/^'.preg_quote($id,'/').'\s+('.$regexp.')\s+/'.$ci,$AUTH_ACL);
498    if(count($matches)){
499        foreach($matches as $match){
500            $match = preg_replace('/#.*$/','',$match); //ignore comments
501            $acl   = preg_split('/\s+/',$match);
502            if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
503            if($acl[2] > $perm){
504                $perm = $acl[2];
505            }
506        }
507        if($perm > -1){
508            //we had a match - return it
509            return $perm;
510        }
511    }
512
513    //still here? do the namespace checks
514    if($ns){
515        $path = $ns.':\*';
516    }else{
517        $path = '\*'; //root document
518    }
519
520    do{
521        $matches = preg_grep('/^'.$path.'\s+('.$regexp.')\s+/'.$ci,$AUTH_ACL);
522        if(count($matches)){
523            foreach($matches as $match){
524                $match = preg_replace('/#.*$/','',$match); //ignore comments
525                $acl   = preg_split('/\s+/',$match);
526                if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
527                if($acl[2] > $perm){
528                    $perm = $acl[2];
529                }
530            }
531            //we had a match - return it
532            return $perm;
533        }
534
535        //get next higher namespace
536        $ns   = getNS($ns);
537
538        if($path != '\*'){
539            $path = $ns.':\*';
540            if($path == ':\*') $path = '\*';
541        }else{
542            //we did this already
543            //looks like there is something wrong with the ACL
544            //break here
545            msg('No ACL setup yet! Denying access to everyone.');
546            return AUTH_NONE;
547        }
548    }while(1); //this should never loop endless
549
550    //still here? return no permissions
551    return AUTH_NONE;
552}
553
554/**
555 * Encode ASCII special chars
556 *
557 * Some auth backends allow special chars in their user and groupnames
558 * The special chars are encoded with this function. Only ASCII chars
559 * are encoded UTF-8 multibyte are left as is (different from usual
560 * urlencoding!).
561 *
562 * Decoding can be done with rawurldecode
563 *
564 * @author Andreas Gohr <gohr@cosmocode.de>
565 * @see rawurldecode()
566 */
567function auth_nameencode($name,$skip_group=false){
568    global $cache_authname;
569    $cache =& $cache_authname;
570    $name  = (string) $name;
571
572    // never encode wildcard FS#1955
573    if($name == '%USER%') return $name;
574
575    if (!isset($cache[$name][$skip_group])) {
576        if($skip_group && $name{0} =='@'){
577            $cache[$name][$skip_group] = '@'.preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
578                    "'%'.dechex(ord(substr('\\1',-1)))",substr($name,1));
579        }else{
580            $cache[$name][$skip_group] = preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
581                    "'%'.dechex(ord(substr('\\1',-1)))",$name);
582        }
583    }
584
585    return $cache[$name][$skip_group];
586}
587
588/**
589 * Create a pronouncable password
590 *
591 * @author  Andreas Gohr <andi@splitbrain.org>
592 * @link    http://www.phpbuilder.com/annotate/message.php3?id=1014451
593 *
594 * @return string  pronouncable password
595 */
596function auth_pwgen(){
597    $pw = '';
598    $c  = 'bcdfghjklmnprstvwz'; //consonants except hard to speak ones
599    $v  = 'aeiou';              //vowels
600    $a  = $c.$v;                //both
601
602    //use two syllables...
603    for($i=0;$i < 2; $i++){
604        $pw .= $c[rand(0, strlen($c)-1)];
605        $pw .= $v[rand(0, strlen($v)-1)];
606        $pw .= $a[rand(0, strlen($a)-1)];
607    }
608    //... and add a nice number
609    $pw .= rand(10,99);
610
611    return $pw;
612}
613
614/**
615 * Sends a password to the given user
616 *
617 * @author  Andreas Gohr <andi@splitbrain.org>
618 *
619 * @return bool  true on success
620 */
621function auth_sendPassword($user,$password){
622    global $conf;
623    global $lang;
624    global $auth;
625    if (!$auth) return false;
626
627    $hdrs  = '';
628    $user     = $auth->cleanUser($user);
629    $userinfo = $auth->getUserData($user);
630
631    if(!$userinfo['mail']) return false;
632
633    $text = rawLocale('password');
634    $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
635    $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
636    $text = str_replace('@LOGIN@',$user,$text);
637    $text = str_replace('@PASSWORD@',$password,$text);
638    $text = str_replace('@TITLE@',$conf['title'],$text);
639
640    return mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
641            $lang['regpwmail'],
642            $text,
643            $conf['mailfrom']);
644}
645
646/**
647 * Register a new user
648 *
649 * This registers a new user - Data is read directly from $_POST
650 *
651 * @author  Andreas Gohr <andi@splitbrain.org>
652 *
653 * @return bool  true on success, false on any error
654 */
655function register(){
656    global $lang;
657    global $conf;
658    global $auth;
659
660    if (!$auth) return false;
661    if(!$_POST['save']) return false;
662    if(!$auth->canDo('addUser')) return false;
663
664    //clean username
665    $_POST['login'] = trim($auth->cleanUser($_POST['login']));
666
667    //clean fullname and email
668    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
669    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
670
671    if( empty($_POST['login']) ||
672        empty($_POST['fullname']) ||
673        empty($_POST['email']) ){
674        msg($lang['regmissing'],-1);
675        return false;
676    }
677
678    if ($conf['autopasswd']) {
679        $pass = auth_pwgen();                // automatically generate password
680    } elseif (empty($_POST['pass']) ||
681            empty($_POST['passchk'])) {
682        msg($lang['regmissing'], -1);        // complain about missing passwords
683        return false;
684    } elseif ($_POST['pass'] != $_POST['passchk']) {
685        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
686        return false;
687    } else {
688        $pass = $_POST['pass'];              // accept checked and valid password
689    }
690
691    //check mail
692    if(!mail_isvalid($_POST['email'])){
693        msg($lang['regbadmail'],-1);
694        return false;
695    }
696
697    //okay try to create the user
698    if(!$auth->triggerUserMod('create', array($_POST['login'],$pass,$_POST['fullname'],$_POST['email']))){
699        msg($lang['reguexists'],-1);
700        return false;
701    }
702
703    // create substitutions for use in notification email
704    $substitutions = array(
705            'NEWUSER' => $_POST['login'],
706            'NEWNAME' => $_POST['fullname'],
707            'NEWEMAIL' => $_POST['email'],
708            );
709
710    if (!$conf['autopasswd']) {
711        msg($lang['regsuccess2'],1);
712        notify('', 'register', '', $_POST['login'], false, $substitutions);
713        return true;
714    }
715
716    // autogenerated password? then send him the password
717    if (auth_sendPassword($_POST['login'],$pass)){
718        msg($lang['regsuccess'],1);
719        notify('', 'register', '', $_POST['login'], false, $substitutions);
720        return true;
721    }else{
722        msg($lang['regmailfail'],-1);
723        return false;
724    }
725}
726
727/**
728 * Update user profile
729 *
730 * @author    Christopher Smith <chris@jalakai.co.uk>
731 */
732function updateprofile() {
733    global $conf;
734    global $INFO;
735    global $lang;
736    global $auth;
737
738    if (!$auth) return false;
739    if(empty($_POST['save'])) return false;
740    if(!checkSecurityToken()) return false;
741
742    // should not be able to get here without Profile being possible...
743    if(!$auth->canDo('Profile')) {
744        msg($lang['profna'],-1);
745        return false;
746    }
747
748    if ($_POST['newpass'] != $_POST['passchk']) {
749        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
750        return false;
751    }
752
753    //clean fullname and email
754    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
755    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
756
757    if ((empty($_POST['fullname']) && $auth->canDo('modName')) ||
758        (empty($_POST['email']) && $auth->canDo('modMail'))) {
759        msg($lang['profnoempty'],-1);
760        return false;
761    }
762
763    if (!mail_isvalid($_POST['email']) && $auth->canDo('modMail')){
764        msg($lang['regbadmail'],-1);
765        return false;
766    }
767
768    if ($_POST['fullname'] != $INFO['userinfo']['name'] && $auth->canDo('modName')) $changes['name'] = $_POST['fullname'];
769    if ($_POST['email'] != $INFO['userinfo']['mail'] && $auth->canDo('modMail')) $changes['mail'] = $_POST['email'];
770    if (!empty($_POST['newpass']) && $auth->canDo('modPass')) $changes['pass'] = $_POST['newpass'];
771
772    if (!count($changes)) {
773        msg($lang['profnochange'], -1);
774        return false;
775    }
776
777    if ($conf['profileconfirm']) {
778        if (!$auth->checkPass($_SERVER['REMOTE_USER'], $_POST['oldpass'])) {
779            msg($lang['badlogin'],-1);
780            return false;
781        }
782    }
783
784    if ($result = $auth->triggerUserMod('modify', array($_SERVER['REMOTE_USER'], $changes))) {
785        // update cookie and session with the changed data
786        $cookie = base64_decode($_COOKIE[DOKU_COOKIE]);
787        list($user,$sticky,$pass) = explode('|',$cookie,3);
788        if ($changes['pass']) $pass = PMA_blowfish_encrypt($changes['pass'],auth_cookiesalt());
789
790        auth_setCookie($_SERVER['REMOTE_USER'],$pass,(bool)$sticky);
791        return true;
792    }
793}
794
795/**
796 * Send a  new password
797 *
798 * This function handles both phases of the password reset:
799 *
800 *   - handling the first request of password reset
801 *   - validating the password reset auth token
802 *
803 * @author Benoit Chesneau <benoit@bchesneau.info>
804 * @author Chris Smith <chris@jalakai.co.uk>
805 * @author Andreas Gohr <andi@splitbrain.org>
806 *
807 * @return bool true on success, false on any error
808 */
809function act_resendpwd(){
810    global $lang;
811    global $conf;
812    global $auth;
813
814    if(!actionOK('resendpwd')) return false;
815    if (!$auth) return false;
816
817    // should not be able to get here without modPass being possible...
818    if(!$auth->canDo('modPass')) {
819        msg($lang['resendna'],-1);
820        return false;
821    }
822
823    $token = preg_replace('/[^a-f0-9]+/','',$_REQUEST['pwauth']);
824
825    if($token){
826        // we're in token phase
827
828        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
829        if(!@file_exists($tfile)){
830            msg($lang['resendpwdbadauth'],-1);
831            return false;
832        }
833        $user = io_readfile($tfile);
834        @unlink($tfile);
835        $userinfo = $auth->getUserData($user);
836        if(!$userinfo['mail']) {
837            msg($lang['resendpwdnouser'], -1);
838            return false;
839        }
840
841        $pass = auth_pwgen();
842        if (!$auth->triggerUserMod('modify', array($user,array('pass' => $pass)))) {
843            msg('error modifying user data',-1);
844            return false;
845        }
846
847        if (auth_sendPassword($user,$pass)) {
848            msg($lang['resendpwdsuccess'],1);
849        } else {
850            msg($lang['regmailfail'],-1);
851        }
852        return true;
853
854    } else {
855        // we're in request phase
856
857        if(!$_POST['save']) return false;
858
859        if (empty($_POST['login'])) {
860            msg($lang['resendpwdmissing'], -1);
861            return false;
862        } else {
863            $user = trim($auth->cleanUser($_POST['login']));
864        }
865
866        $userinfo = $auth->getUserData($user);
867        if(!$userinfo['mail']) {
868            msg($lang['resendpwdnouser'], -1);
869            return false;
870        }
871
872        // generate auth token
873        $token = md5(auth_cookiesalt().$user); //secret but user based
874        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
875        $url = wl('',array('do'=>'resendpwd','pwauth'=>$token),true,'&');
876
877        io_saveFile($tfile,$user);
878
879        $text = rawLocale('pwconfirm');
880        $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
881        $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
882        $text = str_replace('@LOGIN@',$user,$text);
883        $text = str_replace('@TITLE@',$conf['title'],$text);
884        $text = str_replace('@CONFIRM@',$url,$text);
885
886        if(mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
887                     $lang['regpwmail'],
888                     $text,
889                     $conf['mailfrom'])){
890            msg($lang['resendpwdconfirm'],1);
891        }else{
892            msg($lang['regmailfail'],-1);
893        }
894        return true;
895    }
896
897    return false; // never reached
898}
899
900/**
901 * Encrypts a password using the given method and salt
902 *
903 * If the selected method needs a salt and none was given, a random one
904 * is chosen.
905 *
906 * The following methods are understood:
907 *
908 *   smd5  - Salted MD5 hashing
909 *   apr1  - Apache salted MD5 hashing
910 *   md5   - Simple MD5 hashing
911 *   sha1  - SHA1 hashing
912 *   ssha  - Salted SHA1 hashing
913 *   crypt - Unix crypt
914 *   mysql - MySQL password (old method)
915 *   my411 - MySQL 4.1.1 password
916 *   kmd5  - Salted MD5 hashing as used by UNB
917 *
918 * @author  Andreas Gohr <andi@splitbrain.org>
919 * @return  string  The crypted password
920 */
921function auth_cryptPassword($clear,$method='',$salt=null){
922    global $conf;
923    if(empty($method)) $method = $conf['passcrypt'];
924
925    //prepare a salt
926    if(is_null($salt)) $salt = md5(uniqid(rand(), true));
927
928    switch(strtolower($method)){
929        case 'smd5':
930            if(defined('CRYPT_MD5') && CRYPT_MD5) return crypt($clear,'$1$'.substr($salt,0,8).'$');
931            // when crypt can't handle SMD5, falls through to pure PHP implementation
932            $magic = '1';
933        case 'apr1':
934            //from http://de.php.net/manual/en/function.crypt.php#73619 comment by <mikey_nich at hotmail dot com>
935            if(!isset($magic)) $magic = 'apr1';
936            $salt = substr($salt,0,8);
937            $len = strlen($clear);
938            $text = $clear.'$'.$magic.'$'.$salt;
939            $bin = pack("H32", md5($clear.$salt.$clear));
940            for($i = $len; $i > 0; $i -= 16) {
941                $text .= substr($bin, 0, min(16, $i));
942            }
943            for($i = $len; $i > 0; $i >>= 1) {
944                $text .= ($i & 1) ? chr(0) : $clear{0};
945            }
946            $bin = pack("H32", md5($text));
947            for($i = 0; $i < 1000; $i++) {
948                $new = ($i & 1) ? $clear : $bin;
949                if ($i % 3) $new .= $salt;
950                if ($i % 7) $new .= $clear;
951                $new .= ($i & 1) ? $bin : $clear;
952                $bin = pack("H32", md5($new));
953            }
954            $tmp = '';
955            for ($i = 0; $i < 5; $i++) {
956                $k = $i + 6;
957                $j = $i + 12;
958                if ($j == 16) $j = 5;
959                $tmp = $bin[$i].$bin[$k].$bin[$j].$tmp;
960            }
961            $tmp = chr(0).chr(0).$bin[11].$tmp;
962            $tmp = strtr(strrev(substr(base64_encode($tmp), 2)),
963                    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
964                    "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
965            return '$'.$magic.'$'.$salt.'$'.$tmp;
966        case 'md5':
967            return md5($clear);
968        case 'sha1':
969            return sha1($clear);
970        case 'ssha':
971            $salt=substr($salt,0,4);
972            return '{SSHA}'.base64_encode(pack("H*", sha1($clear.$salt)).$salt);
973        case 'crypt':
974            return crypt($clear,substr($salt,0,2));
975        case 'mysql':
976            //from http://www.php.net/mysql comment by <soren at byu dot edu>
977            $nr=0x50305735;
978            $nr2=0x12345671;
979            $add=7;
980            $charArr = preg_split("//", $clear);
981            foreach ($charArr as $char) {
982                if (($char == '') || ($char == ' ') || ($char == '\t')) continue;
983                $charVal = ord($char);
984                $nr ^= ((($nr & 63) + $add) * $charVal) + ($nr << 8);
985                $nr2 += ($nr2 << 8) ^ $nr;
986                $add += $charVal;
987            }
988            return sprintf("%08x%08x", ($nr & 0x7fffffff), ($nr2 & 0x7fffffff));
989        case 'my411':
990            return '*'.sha1(pack("H*", sha1($clear)));
991        case 'kmd5':
992            $key = substr($salt, 16, 2);
993            $hash1 = strtolower(md5($key . md5($clear)));
994            $hash2 = substr($hash1, 0, 16) . $key . substr($hash1, 16);
995            return $hash2;
996        default:
997            msg("Unsupported crypt method $method",-1);
998    }
999}
1000
1001/**
1002 * Verifies a cleartext password against a crypted hash
1003 *
1004 * The method and salt used for the crypted hash is determined automatically
1005 * then the clear text password is crypted using the same method. If both hashs
1006 * match true is is returned else false
1007 *
1008 * @author  Andreas Gohr <andi@splitbrain.org>
1009 * @return  bool
1010 */
1011function auth_verifyPassword($clear,$crypt){
1012    $method='';
1013    $salt='';
1014
1015    //determine the used method and salt
1016    $len = strlen($crypt);
1017    if(preg_match('/^\$1\$([^\$]{0,8})\$/',$crypt,$m)){
1018        $method = 'smd5';
1019        $salt   = $m[1];
1020    }elseif(preg_match('/^\$apr1\$([^\$]{0,8})\$/',$crypt,$m)){
1021        $method = 'apr1';
1022        $salt   = $m[1];
1023    }elseif(substr($crypt,0,6) == '{SSHA}'){
1024        $method = 'ssha';
1025        $salt   = substr(base64_decode(substr($crypt, 6)),20);
1026    }elseif($len == 32){
1027        $method = 'md5';
1028    }elseif($len == 40){
1029        $method = 'sha1';
1030    }elseif($len == 16){
1031        $method = 'mysql';
1032    }elseif($len == 41 && $crypt[0] == '*'){
1033        $method = 'my411';
1034    }elseif($len == 34){
1035        $method = 'kmd5';
1036        $salt   = $crypt;
1037    }else{
1038        $method = 'crypt';
1039        $salt   = substr($crypt,0,2);
1040    }
1041
1042    //crypt and compare
1043    if(auth_cryptPassword($clear,$method,$salt) === $crypt){
1044        return true;
1045    }
1046    return false;
1047}
1048
1049/**
1050 * Set the authentication cookie and add user identification data to the session
1051 *
1052 * @param string  $user       username
1053 * @param string  $pass       encrypted password
1054 * @param bool    $sticky     whether or not the cookie will last beyond the session
1055 */
1056function auth_setCookie($user,$pass,$sticky) {
1057    global $conf;
1058    global $auth;
1059    global $USERINFO;
1060
1061    if (!$auth) return false;
1062    $USERINFO = $auth->getUserData($user);
1063
1064    // set cookie
1065    $cookie = base64_encode($user).'|'.((int) $sticky).'|'.base64_encode($pass);
1066    $time = $sticky ? (time()+60*60*24*365) : 0; //one year
1067    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
1068        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
1069    }else{
1070        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
1071    }
1072    // set session
1073    $_SESSION[DOKU_COOKIE]['auth']['user'] = $user;
1074    $_SESSION[DOKU_COOKIE]['auth']['pass'] = $pass;
1075    $_SESSION[DOKU_COOKIE]['auth']['buid'] = auth_browseruid();
1076    $_SESSION[DOKU_COOKIE]['auth']['info'] = $USERINFO;
1077    $_SESSION[DOKU_COOKIE]['auth']['time'] = time();
1078}
1079
1080/**
1081 * Returns the user, (encrypted) password and sticky bit from cookie
1082 *
1083 * @returns array
1084 */
1085function auth_getCookie(){
1086    if (!isset($_COOKIE[DOKU_COOKIE])) {
1087        return array(null, null, null);
1088    }
1089    list($user,$sticky,$pass) = explode('|',$_COOKIE[DOKU_COOKIE],3);
1090    $sticky = (bool) $sticky;
1091    $pass   = base64_decode($pass);
1092    $user   = base64_decode($user);
1093    return array($user,$sticky,$pass);
1094}
1095
1096//Setup VIM: ex: et ts=2 enc=utf-8 :
1097