xref: /dokuwiki/inc/auth.php (revision 2f1d4a94ebb4e5c412ea4332751e2a6104c7f26b) 
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    $AUTH_ACL = auth_loadACL();
107}
108
109/**
110 * Loads the ACL setup and handle user wildcards
111 *
112 * @author Andreas Gohr <andi@splitbrain.org>
113 * @returns array
114 */
115function auth_loadACL(){
116    global $config_cascade;
117
118    if(!is_readable($config_cascade['acl']['default'])) return array();
119
120    $acl = file($config_cascade['acl']['default']);
121
122    //support user wildcard
123    if(isset($_SERVER['REMOTE_USER'])){
124        $len = count($acl);
125        for($i=0; $i<$len; $i++){
126            if($acl[$i]{0} == '#') continue;
127            list($id,$rest) = preg_split('/\s+/',$acl[$i],2);
128            $id   = str_replace('%USER%',cleanID($_SERVER['REMOTE_USER']),$id);
129            $rest = str_replace('%USER%',auth_nameencode($_SERVER['REMOTE_USER']),$rest);
130            $acl[$i] = "$id\t$rest";
131        }
132    }
133    return $acl;
134}
135
136function auth_login_wrapper($evdata) {
137    return auth_login($evdata['user'],
138                      $evdata['password'],
139                      $evdata['sticky'],
140                      $evdata['silent']);
141}
142
143/**
144 * This tries to login the user based on the sent auth credentials
145 *
146 * The authentication works like this: if a username was given
147 * a new login is assumed and user/password are checked. If they
148 * are correct the password is encrypted with blowfish and stored
149 * together with the username in a cookie - the same info is stored
150 * in the session, too. Additonally a browserID is stored in the
151 * session.
152 *
153 * If no username was given the cookie is checked: if the username,
154 * crypted password and browserID match between session and cookie
155 * no further testing is done and the user is accepted
156 *
157 * If a cookie was found but no session info was availabe the
158 * blowfish encrypted password from the cookie is decrypted and
159 * together with username rechecked by calling this function again.
160 *
161 * On a successful login $_SERVER[REMOTE_USER] and $USERINFO
162 * are set.
163 *
164 * @author  Andreas Gohr <andi@splitbrain.org>
165 *
166 * @param   string  $user    Username
167 * @param   string  $pass    Cleartext Password
168 * @param   bool    $sticky  Cookie should not expire
169 * @param   bool    $silent  Don't show error on bad auth
170 * @return  bool             true on successful auth
171 */
172function auth_login($user,$pass,$sticky=false,$silent=false){
173    global $USERINFO;
174    global $conf;
175    global $lang;
176    global $auth;
177    $sticky ? $sticky = true : $sticky = false; //sanity check
178
179    if (!$auth) return false;
180
181    if(!empty($user)){
182        //usual login
183        if ($auth->checkPass($user,$pass)){
184            // make logininfo globally available
185            $_SERVER['REMOTE_USER'] = $user;
186            auth_setCookie($user,PMA_blowfish_encrypt($pass,auth_cookiesalt()),$sticky);
187            return true;
188        }else{
189            //invalid credentials - log off
190            if(!$silent) msg($lang['badlogin'],-1);
191            auth_logoff();
192            return false;
193        }
194    }else{
195        // read cookie information
196        list($user,$sticky,$pass) = auth_getCookie();
197        // get session info
198        $session = $_SESSION[DOKU_COOKIE]['auth'];
199        if($user && $pass){
200            // we got a cookie - see if we can trust it
201            if(isset($session) &&
202                    $auth->useSessionCache($user) &&
203                    ($session['time'] >= time()-$conf['auth_security_timeout']) &&
204                    ($session['user'] == $user) &&
205                    ($session['pass'] == $pass) &&  //still crypted
206                    ($session['buid'] == auth_browseruid()) ){
207                // he has session, cookie and browser right - let him in
208                $_SERVER['REMOTE_USER'] = $user;
209                $USERINFO = $session['info']; //FIXME move all references to session
210                return true;
211            }
212            // no we don't trust it yet - recheck pass but silent
213            $pass = PMA_blowfish_decrypt($pass,auth_cookiesalt());
214            return auth_login($user,$pass,$sticky,true);
215        }
216    }
217    //just to be sure
218    auth_logoff(true);
219    return false;
220}
221
222/**
223 * Checks if a given authentication token was stored in the session
224 *
225 * Will setup authentication data using data from the session if the
226 * token is correct. Will exit with a 401 Status if not.
227 *
228 * @author Andreas Gohr <andi@splitbrain.org>
229 * @param  string $token The authentication token
230 * @return boolean true (or will exit on failure)
231 */
232function auth_validateToken($token){
233    if(!$token || $token != $_SESSION[DOKU_COOKIE]['auth']['token']){
234        // bad token
235        header("HTTP/1.0 401 Unauthorized");
236        print 'Invalid auth token - maybe the session timed out';
237        unset($_SESSION[DOKU_COOKIE]['auth']['token']); // no second chance
238        exit;
239    }
240    // still here? trust the session data
241    global $USERINFO;
242    $_SERVER['REMOTE_USER'] = $_SESSION[DOKU_COOKIE]['auth']['user'];
243    $USERINFO = $_SESSION[DOKU_COOKIE]['auth']['info'];
244    return true;
245}
246
247/**
248 * Create an auth token and store it in the session
249 *
250 * NOTE: this is completely unrelated to the getSecurityToken() function
251 *
252 * @author Andreas Gohr <andi@splitbrain.org>
253 * @return string The auth token
254 */
255function auth_createToken(){
256    $token = md5(mt_rand());
257    @session_start(); // reopen the session if needed
258    $_SESSION[DOKU_COOKIE]['auth']['token'] = $token;
259    session_write_close();
260    return $token;
261}
262
263/**
264 * Builds a pseudo UID from browser and IP data
265 *
266 * This is neither unique nor unfakable - still it adds some
267 * security. Using the first part of the IP makes sure
268 * proxy farms like AOLs are stil okay.
269 *
270 * @author  Andreas Gohr <andi@splitbrain.org>
271 *
272 * @return  string  a MD5 sum of various browser headers
273 */
274function auth_browseruid(){
275    $ip   = clientIP(true);
276    $uid  = '';
277    $uid .= $_SERVER['HTTP_USER_AGENT'];
278    $uid .= $_SERVER['HTTP_ACCEPT_ENCODING'];
279    $uid .= $_SERVER['HTTP_ACCEPT_LANGUAGE'];
280    $uid .= $_SERVER['HTTP_ACCEPT_CHARSET'];
281    $uid .= substr($ip,0,strpos($ip,'.'));
282    return md5($uid);
283}
284
285/**
286 * Creates a random key to encrypt the password in cookies
287 *
288 * This function tries to read the password for encrypting
289 * cookies from $conf['metadir'].'/_htcookiesalt'
290 * if no such file is found a random key is created and
291 * and stored in this file.
292 *
293 * @author  Andreas Gohr <andi@splitbrain.org>
294 *
295 * @return  string
296 */
297function auth_cookiesalt(){
298    global $conf;
299    $file = $conf['metadir'].'/_htcookiesalt';
300    $salt = io_readFile($file);
301    if(empty($salt)){
302        $salt = uniqid(rand(),true);
303        io_saveFile($file,$salt);
304    }
305    return $salt;
306}
307
308/**
309 * Log out the current user
310 *
311 * This clears all authentication data and thus log the user
312 * off. It also clears session data.
313 *
314 * @author  Andreas Gohr <andi@splitbrain.org>
315 * @param bool $keepbc - when true, the breadcrumb data is not cleared
316 */
317function auth_logoff($keepbc=false){
318    global $conf;
319    global $USERINFO;
320    global $INFO, $ID;
321    global $auth;
322
323    // make sure the session is writable (it usually is)
324    @session_start();
325
326    if(isset($_SESSION[DOKU_COOKIE]['auth']['user']))
327        unset($_SESSION[DOKU_COOKIE]['auth']['user']);
328    if(isset($_SESSION[DOKU_COOKIE]['auth']['pass']))
329        unset($_SESSION[DOKU_COOKIE]['auth']['pass']);
330    if(isset($_SESSION[DOKU_COOKIE]['auth']['info']))
331        unset($_SESSION[DOKU_COOKIE]['auth']['info']);
332    if(!$keepbc && isset($_SESSION[DOKU_COOKIE]['bc']))
333        unset($_SESSION[DOKU_COOKIE]['bc']);
334    if(isset($_SERVER['REMOTE_USER']))
335        unset($_SERVER['REMOTE_USER']);
336    $USERINFO=null; //FIXME
337
338    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
339        setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
340    }else{
341        setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
342    }
343
344    if($auth) $auth->logOff();
345}
346
347/**
348 * Check if a user is a manager
349 *
350 * Should usually be called without any parameters to check the current
351 * user.
352 *
353 * The info is available through $INFO['ismanager'], too
354 *
355 * @author Andreas Gohr <andi@splitbrain.org>
356 * @see    auth_isadmin
357 * @param  string user      - Username
358 * @param  array  groups    - List of groups the user is in
359 * @param  bool   adminonly - when true checks if user is admin
360 */
361function auth_ismanager($user=null,$groups=null,$adminonly=false){
362    global $conf;
363    global $USERINFO;
364    global $auth;
365
366    if (!$auth) return false;
367    if(is_null($user)) {
368        if (!isset($_SERVER['REMOTE_USER'])) {
369            return false;
370        } else {
371            $user = $_SERVER['REMOTE_USER'];
372        }
373    }
374    if(is_null($groups)){
375        $groups = (array) $USERINFO['grps'];
376    }
377
378    // check superuser match
379    if(auth_isMember($conf['superuser'],$user, $groups)) return true;
380    if($adminonly) return false;
381    // check managers
382    if(auth_isMember($conf['manager'],$user, $groups)) return true;
383
384    return false;
385}
386
387/**
388 * Check if a user is admin
389 *
390 * Alias to auth_ismanager with adminonly=true
391 *
392 * The info is available through $INFO['isadmin'], too
393 *
394 * @author Andreas Gohr <andi@splitbrain.org>
395 * @see auth_ismanager
396 */
397function auth_isadmin($user=null,$groups=null){
398    return auth_ismanager($user,$groups,true);
399}
400
401
402/**
403 * Match a user and his groups against a comma separated list of
404 * users and groups to determine membership status
405 *
406 * Note: all input should NOT be nameencoded.
407 *
408 * @param $memberlist string commaseparated list of allowed users and groups
409 * @param $user       string user to match against
410 * @param $groups     array  groups the user is member of
411 * @returns bool      true for membership acknowledged
412 */
413function auth_isMember($memberlist,$user,array $groups){
414    global $auth;
415    if (!$auth) return false;
416
417    // clean user and groups
418    if($auth->isCaseSensitive()){
419        $user = utf8_strtolower($user);
420        $groups = array_map('utf8_strtolower',$groups);
421    }
422    $user = $auth->cleanUser($user);
423    $groups = array_map(array($auth,'cleanGroup'),$groups);
424
425    // extract the memberlist
426    $members = explode(',',$memberlist);
427    $members = array_map('trim',$members);
428    $members = array_unique($members);
429    $members = array_filter($members);
430
431    // compare cleaned values
432    foreach($members as $member){
433        if($auth->isCaseSensitive()) $member = utf8_strtolower($member);
434        if($member[0] == '@'){
435            $member = $auth->cleanGroup(substr($member,1));
436            if(in_array($member, $groups)) return true;
437        }else{
438            $member = $auth->cleanUser($member);
439            if($member == $user) return true;
440        }
441    }
442
443    // still here? not a member!
444    return false;
445}
446
447/**
448 * Convinience function for auth_aclcheck()
449 *
450 * This checks the permissions for the current user
451 *
452 * @author  Andreas Gohr <andi@splitbrain.org>
453 *
454 * @param  string  $id  page ID (needs to be resolved and cleaned)
455 * @return int          permission level
456 */
457function auth_quickaclcheck($id){
458    global $conf;
459    global $USERINFO;
460    # if no ACL is used always return upload rights
461    if(!$conf['useacl']) return AUTH_UPLOAD;
462    return auth_aclcheck($id,$_SERVER['REMOTE_USER'],$USERINFO['grps']);
463}
464
465/**
466 * Returns the maximum rights a user has for
467 * the given ID or its namespace
468 *
469 * @author  Andreas Gohr <andi@splitbrain.org>
470 *
471 * @param  string  $id     page ID (needs to be resolved and cleaned)
472 * @param  string  $user   Username
473 * @param  array   $groups Array of groups the user is in
474 * @return int             permission level
475 */
476function auth_aclcheck($id,$user,$groups){
477    global $conf;
478    global $AUTH_ACL;
479    global $auth;
480
481    // if no ACL is used always return upload rights
482    if(!$conf['useacl']) return AUTH_UPLOAD;
483    if (!$auth) return AUTH_NONE;
484
485    //make sure groups is an array
486    if(!is_array($groups)) $groups = array();
487
488    //if user is superuser or in superusergroup return 255 (acl_admin)
489    if(auth_isadmin($user,$groups)) { return AUTH_ADMIN; }
490
491    $ci = '';
492    if(!$auth->isCaseSensitive()) $ci = 'ui';
493
494    $user = $auth->cleanUser($user);
495    $groups = array_map(array($auth,'cleanGroup'),(array)$groups);
496    $user = auth_nameencode($user);
497
498    //prepend groups with @ and nameencode
499    $cnt = count($groups);
500    for($i=0; $i<$cnt; $i++){
501        $groups[$i] = '@'.auth_nameencode($groups[$i]);
502    }
503
504    $ns    = getNS($id);
505    $perm  = -1;
506
507    if($user || count($groups)){
508        //add ALL group
509        $groups[] = '@ALL';
510        //add User
511        if($user) $groups[] = $user;
512        //build regexp
513        $regexp   = join('|',$groups);
514    }else{
515        $regexp = '@ALL';
516    }
517
518    //check exact match first
519    $matches = preg_grep('/^'.preg_quote($id,'/').'\s+('.$regexp.')\s+/'.$ci,$AUTH_ACL);
520    if(count($matches)){
521        foreach($matches as $match){
522            $match = preg_replace('/#.*$/','',$match); //ignore comments
523            $acl   = preg_split('/\s+/',$match);
524            if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
525            if($acl[2] > $perm){
526                $perm = $acl[2];
527            }
528        }
529        if($perm > -1){
530            //we had a match - return it
531            return $perm;
532        }
533    }
534
535    //still here? do the namespace checks
536    if($ns){
537        $path = $ns.':*';
538    }else{
539        $path = '*'; //root document
540    }
541
542    do{
543        $matches = preg_grep('/^'.preg_quote($path,'/').'\s+('.$regexp.')\s+/'.$ci,$AUTH_ACL);
544        if(count($matches)){
545            foreach($matches as $match){
546                $match = preg_replace('/#.*$/','',$match); //ignore comments
547                $acl   = preg_split('/\s+/',$match);
548                if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
549                if($acl[2] > $perm){
550                    $perm = $acl[2];
551                }
552            }
553            //we had a match - return it
554            return $perm;
555        }
556
557        //get next higher namespace
558        $ns   = getNS($ns);
559
560        if($path != '*'){
561            $path = $ns.':*';
562            if($path == ':*') $path = '*';
563        }else{
564            //we did this already
565            //looks like there is something wrong with the ACL
566            //break here
567            msg('No ACL setup yet! Denying access to everyone.');
568            return AUTH_NONE;
569        }
570    }while(1); //this should never loop endless
571
572    //still here? return no permissions
573    return AUTH_NONE;
574}
575
576/**
577 * Encode ASCII special chars
578 *
579 * Some auth backends allow special chars in their user and groupnames
580 * The special chars are encoded with this function. Only ASCII chars
581 * are encoded UTF-8 multibyte are left as is (different from usual
582 * urlencoding!).
583 *
584 * Decoding can be done with rawurldecode
585 *
586 * @author Andreas Gohr <gohr@cosmocode.de>
587 * @see rawurldecode()
588 */
589function auth_nameencode($name,$skip_group=false){
590    global $cache_authname;
591    $cache =& $cache_authname;
592    $name  = (string) $name;
593
594    // never encode wildcard FS#1955
595    if($name == '%USER%') return $name;
596
597    if (!isset($cache[$name][$skip_group])) {
598        if($skip_group && $name{0} =='@'){
599            $cache[$name][$skip_group] = '@'.preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
600                    "'%'.dechex(ord(substr('\\1',-1)))",substr($name,1));
601        }else{
602            $cache[$name][$skip_group] = preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
603                    "'%'.dechex(ord(substr('\\1',-1)))",$name);
604        }
605    }
606
607    return $cache[$name][$skip_group];
608}
609
610/**
611 * Create a pronouncable password
612 *
613 * @author  Andreas Gohr <andi@splitbrain.org>
614 * @link    http://www.phpbuilder.com/annotate/message.php3?id=1014451
615 *
616 * @return string  pronouncable password
617 */
618function auth_pwgen(){
619    $pw = '';
620    $c  = 'bcdfghjklmnprstvwz'; //consonants except hard to speak ones
621    $v  = 'aeiou';              //vowels
622    $a  = $c.$v;                //both
623
624    //use two syllables...
625    for($i=0;$i < 2; $i++){
626        $pw .= $c[rand(0, strlen($c)-1)];
627        $pw .= $v[rand(0, strlen($v)-1)];
628        $pw .= $a[rand(0, strlen($a)-1)];
629    }
630    //... and add a nice number
631    $pw .= rand(10,99);
632
633    return $pw;
634}
635
636/**
637 * Sends a password to the given user
638 *
639 * @author  Andreas Gohr <andi@splitbrain.org>
640 *
641 * @return bool  true on success
642 */
643function auth_sendPassword($user,$password){
644    global $conf;
645    global $lang;
646    global $auth;
647    if (!$auth) return false;
648
649    $hdrs  = '';
650    $user     = $auth->cleanUser($user);
651    $userinfo = $auth->getUserData($user);
652
653    if(!$userinfo['mail']) return false;
654
655    $text = rawLocale('password');
656    $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
657    $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
658    $text = str_replace('@LOGIN@',$user,$text);
659    $text = str_replace('@PASSWORD@',$password,$text);
660    $text = str_replace('@TITLE@',$conf['title'],$text);
661
662    return mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
663            $lang['regpwmail'],
664            $text,
665            $conf['mailfrom']);
666}
667
668/**
669 * Register a new user
670 *
671 * This registers a new user - Data is read directly from $_POST
672 *
673 * @author  Andreas Gohr <andi@splitbrain.org>
674 *
675 * @return bool  true on success, false on any error
676 */
677function register(){
678    global $lang;
679    global $conf;
680    global $auth;
681
682    if (!$auth) return false;
683    if(!$_POST['save']) return false;
684    if(!$auth->canDo('addUser')) return false;
685
686    //clean username
687    $_POST['login'] = trim($auth->cleanUser($_POST['login']));
688
689    //clean fullname and email
690    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
691    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
692
693    if( empty($_POST['login']) ||
694        empty($_POST['fullname']) ||
695        empty($_POST['email']) ){
696        msg($lang['regmissing'],-1);
697        return false;
698    }
699
700    if ($conf['autopasswd']) {
701        $pass = auth_pwgen();                // automatically generate password
702    } elseif (empty($_POST['pass']) ||
703            empty($_POST['passchk'])) {
704        msg($lang['regmissing'], -1);        // complain about missing passwords
705        return false;
706    } elseif ($_POST['pass'] != $_POST['passchk']) {
707        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
708        return false;
709    } else {
710        $pass = $_POST['pass'];              // accept checked and valid password
711    }
712
713    //check mail
714    if(!mail_isvalid($_POST['email'])){
715        msg($lang['regbadmail'],-1);
716        return false;
717    }
718
719    //okay try to create the user
720    if(!$auth->triggerUserMod('create', array($_POST['login'],$pass,$_POST['fullname'],$_POST['email']))){
721        msg($lang['reguexists'],-1);
722        return false;
723    }
724
725    // create substitutions for use in notification email
726    $substitutions = array(
727            'NEWUSER' => $_POST['login'],
728            'NEWNAME' => $_POST['fullname'],
729            'NEWEMAIL' => $_POST['email'],
730            );
731
732    if (!$conf['autopasswd']) {
733        msg($lang['regsuccess2'],1);
734        notify('', 'register', '', $_POST['login'], false, $substitutions);
735        return true;
736    }
737
738    // autogenerated password? then send him the password
739    if (auth_sendPassword($_POST['login'],$pass)){
740        msg($lang['regsuccess'],1);
741        notify('', 'register', '', $_POST['login'], false, $substitutions);
742        return true;
743    }else{
744        msg($lang['regmailfail'],-1);
745        return false;
746    }
747}
748
749/**
750 * Update user profile
751 *
752 * @author    Christopher Smith <chris@jalakai.co.uk>
753 */
754function updateprofile() {
755    global $conf;
756    global $INFO;
757    global $lang;
758    global $auth;
759
760    if (!$auth) return false;
761    if(empty($_POST['save'])) return false;
762    if(!checkSecurityToken()) return false;
763
764    // should not be able to get here without Profile being possible...
765    if(!$auth->canDo('Profile')) {
766        msg($lang['profna'],-1);
767        return false;
768    }
769
770    if ($_POST['newpass'] != $_POST['passchk']) {
771        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
772        return false;
773    }
774
775    //clean fullname and email
776    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
777    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
778
779    if ((empty($_POST['fullname']) && $auth->canDo('modName')) ||
780        (empty($_POST['email']) && $auth->canDo('modMail'))) {
781        msg($lang['profnoempty'],-1);
782        return false;
783    }
784
785    if (!mail_isvalid($_POST['email']) && $auth->canDo('modMail')){
786        msg($lang['regbadmail'],-1);
787        return false;
788    }
789
790    if ($_POST['fullname'] != $INFO['userinfo']['name'] && $auth->canDo('modName')) $changes['name'] = $_POST['fullname'];
791    if ($_POST['email'] != $INFO['userinfo']['mail'] && $auth->canDo('modMail')) $changes['mail'] = $_POST['email'];
792    if (!empty($_POST['newpass']) && $auth->canDo('modPass')) $changes['pass'] = $_POST['newpass'];
793
794    if (!count($changes)) {
795        msg($lang['profnochange'], -1);
796        return false;
797    }
798
799    if ($conf['profileconfirm']) {
800        if (!$auth->checkPass($_SERVER['REMOTE_USER'], $_POST['oldpass'])) {
801            msg($lang['badlogin'],-1);
802            return false;
803        }
804    }
805
806    if ($result = $auth->triggerUserMod('modify', array($_SERVER['REMOTE_USER'], $changes))) {
807        // update cookie and session with the changed data
808        $cookie = base64_decode($_COOKIE[DOKU_COOKIE]);
809        list($user,$sticky,$pass) = explode('|',$cookie,3);
810        if ($changes['pass']) $pass = PMA_blowfish_encrypt($changes['pass'],auth_cookiesalt());
811
812        auth_setCookie($_SERVER['REMOTE_USER'],$pass,(bool)$sticky);
813        return true;
814    }
815}
816
817/**
818 * Send a  new password
819 *
820 * This function handles both phases of the password reset:
821 *
822 *   - handling the first request of password reset
823 *   - validating the password reset auth token
824 *
825 * @author Benoit Chesneau <benoit@bchesneau.info>
826 * @author Chris Smith <chris@jalakai.co.uk>
827 * @author Andreas Gohr <andi@splitbrain.org>
828 *
829 * @return bool true on success, false on any error
830 */
831function act_resendpwd(){
832    global $lang;
833    global $conf;
834    global $auth;
835
836    if(!actionOK('resendpwd')) return false;
837    if (!$auth) return false;
838
839    // should not be able to get here without modPass being possible...
840    if(!$auth->canDo('modPass')) {
841        msg($lang['resendna'],-1);
842        return false;
843    }
844
845    $token = preg_replace('/[^a-f0-9]+/','',$_REQUEST['pwauth']);
846
847    if($token){
848        // we're in token phase
849
850        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
851        if(!@file_exists($tfile)){
852            msg($lang['resendpwdbadauth'],-1);
853            return false;
854        }
855        $user = io_readfile($tfile);
856        @unlink($tfile);
857        $userinfo = $auth->getUserData($user);
858        if(!$userinfo['mail']) {
859            msg($lang['resendpwdnouser'], -1);
860            return false;
861        }
862
863        $pass = auth_pwgen();
864        if (!$auth->triggerUserMod('modify', array($user,array('pass' => $pass)))) {
865            msg('error modifying user data',-1);
866            return false;
867        }
868
869        if (auth_sendPassword($user,$pass)) {
870            msg($lang['resendpwdsuccess'],1);
871        } else {
872            msg($lang['regmailfail'],-1);
873        }
874        return true;
875
876    } else {
877        // we're in request phase
878
879        if(!$_POST['save']) return false;
880
881        if (empty($_POST['login'])) {
882            msg($lang['resendpwdmissing'], -1);
883            return false;
884        } else {
885            $user = trim($auth->cleanUser($_POST['login']));
886        }
887
888        $userinfo = $auth->getUserData($user);
889        if(!$userinfo['mail']) {
890            msg($lang['resendpwdnouser'], -1);
891            return false;
892        }
893
894        // generate auth token
895        $token = md5(auth_cookiesalt().$user); //secret but user based
896        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
897        $url = wl('',array('do'=>'resendpwd','pwauth'=>$token),true,'&');
898
899        io_saveFile($tfile,$user);
900
901        $text = rawLocale('pwconfirm');
902        $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
903        $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
904        $text = str_replace('@LOGIN@',$user,$text);
905        $text = str_replace('@TITLE@',$conf['title'],$text);
906        $text = str_replace('@CONFIRM@',$url,$text);
907
908        if(mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
909                     $lang['regpwmail'],
910                     $text,
911                     $conf['mailfrom'])){
912            msg($lang['resendpwdconfirm'],1);
913        }else{
914            msg($lang['regmailfail'],-1);
915        }
916        return true;
917    }
918
919    return false; // never reached
920}
921
922/**
923 * Encrypts a password using the given method and salt
924 *
925 * If the selected method needs a salt and none was given, a random one
926 * is chosen.
927 *
928 * The following methods are understood:
929 *
930 *   smd5  - Salted MD5 hashing
931 *   apr1  - Apache salted MD5 hashing
932 *   md5   - Simple MD5 hashing
933 *   sha1  - SHA1 hashing
934 *   ssha  - Salted SHA1 hashing
935 *   crypt - Unix crypt
936 *   mysql - MySQL password (old method)
937 *   my411 - MySQL 4.1.1 password
938 *   kmd5  - Salted MD5 hashing as used by UNB
939 *
940 * @author  Andreas Gohr <andi@splitbrain.org>
941 * @return  string  The crypted password
942 */
943function auth_cryptPassword($clear,$method='',$salt=null){
944    global $conf;
945    if(empty($method)) $method = $conf['passcrypt'];
946
947    //prepare a salt
948    if(is_null($salt)) $salt = md5(uniqid(rand(), true));
949
950    switch(strtolower($method)){
951        case 'smd5':
952            if(defined('CRYPT_MD5') && CRYPT_MD5) return crypt($clear,'$1$'.substr($salt,0,8).'$');
953            // when crypt can't handle SMD5, falls through to pure PHP implementation
954            $magic = '1';
955        case 'apr1':
956            //from http://de.php.net/manual/en/function.crypt.php#73619 comment by <mikey_nich at hotmail dot com>
957            if(!isset($magic)) $magic = 'apr1';
958            $salt = substr($salt,0,8);
959            $len = strlen($clear);
960            $text = $clear.'$'.$magic.'$'.$salt;
961            $bin = pack("H32", md5($clear.$salt.$clear));
962            for($i = $len; $i > 0; $i -= 16) {
963                $text .= substr($bin, 0, min(16, $i));
964            }
965            for($i = $len; $i > 0; $i >>= 1) {
966                $text .= ($i & 1) ? chr(0) : $clear{0};
967            }
968            $bin = pack("H32", md5($text));
969            for($i = 0; $i < 1000; $i++) {
970                $new = ($i & 1) ? $clear : $bin;
971                if ($i % 3) $new .= $salt;
972                if ($i % 7) $new .= $clear;
973                $new .= ($i & 1) ? $bin : $clear;
974                $bin = pack("H32", md5($new));
975            }
976            $tmp = '';
977            for ($i = 0; $i < 5; $i++) {
978                $k = $i + 6;
979                $j = $i + 12;
980                if ($j == 16) $j = 5;
981                $tmp = $bin[$i].$bin[$k].$bin[$j].$tmp;
982            }
983            $tmp = chr(0).chr(0).$bin[11].$tmp;
984            $tmp = strtr(strrev(substr(base64_encode($tmp), 2)),
985                    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
986                    "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
987            return '$'.$magic.'$'.$salt.'$'.$tmp;
988        case 'md5':
989            return md5($clear);
990        case 'sha1':
991            return sha1($clear);
992        case 'ssha':
993            $salt=substr($salt,0,4);
994            return '{SSHA}'.base64_encode(pack("H*", sha1($clear.$salt)).$salt);
995        case 'crypt':
996            return crypt($clear,substr($salt,0,2));
997        case 'mysql':
998            //from http://www.php.net/mysql comment by <soren at byu dot edu>
999            $nr=0x50305735;
1000            $nr2=0x12345671;
1001            $add=7;
1002            $charArr = preg_split("//", $clear);
1003            foreach ($charArr as $char) {
1004                if (($char == '') || ($char == ' ') || ($char == '\t')) continue;
1005                $charVal = ord($char);
1006                $nr ^= ((($nr & 63) + $add) * $charVal) + ($nr << 8);
1007                $nr2 += ($nr2 << 8) ^ $nr;
1008                $add += $charVal;
1009            }
1010            return sprintf("%08x%08x", ($nr & 0x7fffffff), ($nr2 & 0x7fffffff));
1011        case 'my411':
1012            return '*'.sha1(pack("H*", sha1($clear)));
1013        case 'kmd5':
1014            $key = substr($salt, 16, 2);
1015            $hash1 = strtolower(md5($key . md5($clear)));
1016            $hash2 = substr($hash1, 0, 16) . $key . substr($hash1, 16);
1017            return $hash2;
1018        default:
1019            msg("Unsupported crypt method $method",-1);
1020    }
1021}
1022
1023/**
1024 * Verifies a cleartext password against a crypted hash
1025 *
1026 * The method and salt used for the crypted hash is determined automatically
1027 * then the clear text password is crypted using the same method. If both hashs
1028 * match true is is returned else false
1029 *
1030 * @author  Andreas Gohr <andi@splitbrain.org>
1031 * @return  bool
1032 */
1033function auth_verifyPassword($clear,$crypt){
1034    $method='';
1035    $salt='';
1036
1037    //determine the used method and salt
1038    $len = strlen($crypt);
1039    if(preg_match('/^\$1\$([^\$]{0,8})\$/',$crypt,$m)){
1040        $method = 'smd5';
1041        $salt   = $m[1];
1042    }elseif(preg_match('/^\$apr1\$([^\$]{0,8})\$/',$crypt,$m)){
1043        $method = 'apr1';
1044        $salt   = $m[1];
1045    }elseif(substr($crypt,0,6) == '{SSHA}'){
1046        $method = 'ssha';
1047        $salt   = substr(base64_decode(substr($crypt, 6)),20);
1048    }elseif($len == 32){
1049        $method = 'md5';
1050    }elseif($len == 40){
1051        $method = 'sha1';
1052    }elseif($len == 16){
1053        $method = 'mysql';
1054    }elseif($len == 41 && $crypt[0] == '*'){
1055        $method = 'my411';
1056    }elseif($len == 34){
1057        $method = 'kmd5';
1058        $salt   = $crypt;
1059    }else{
1060        $method = 'crypt';
1061        $salt   = substr($crypt,0,2);
1062    }
1063
1064    //crypt and compare
1065    if(auth_cryptPassword($clear,$method,$salt) === $crypt){
1066        return true;
1067    }
1068    return false;
1069}
1070
1071/**
1072 * Set the authentication cookie and add user identification data to the session
1073 *
1074 * @param string  $user       username
1075 * @param string  $pass       encrypted password
1076 * @param bool    $sticky     whether or not the cookie will last beyond the session
1077 */
1078function auth_setCookie($user,$pass,$sticky) {
1079    global $conf;
1080    global $auth;
1081    global $USERINFO;
1082
1083    if (!$auth) return false;
1084    $USERINFO = $auth->getUserData($user);
1085
1086    // set cookie
1087    $cookie = base64_encode($user).'|'.((int) $sticky).'|'.base64_encode($pass);
1088    $time = $sticky ? (time()+60*60*24*365) : 0; //one year
1089    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
1090        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
1091    }else{
1092        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
1093    }
1094    // set session
1095    $_SESSION[DOKU_COOKIE]['auth']['user'] = $user;
1096    $_SESSION[DOKU_COOKIE]['auth']['pass'] = $pass;
1097    $_SESSION[DOKU_COOKIE]['auth']['buid'] = auth_browseruid();
1098    $_SESSION[DOKU_COOKIE]['auth']['info'] = $USERINFO;
1099    $_SESSION[DOKU_COOKIE]['auth']['time'] = time();
1100}
1101
1102/**
1103 * Returns the user, (encrypted) password and sticky bit from cookie
1104 *
1105 * @returns array
1106 */
1107function auth_getCookie(){
1108    if (!isset($_COOKIE[DOKU_COOKIE])) {
1109        return array(null, null, null);
1110    }
1111    list($user,$sticky,$pass) = explode('|',$_COOKIE[DOKU_COOKIE],3);
1112    $sticky = (bool) $sticky;
1113    $pass   = base64_decode($pass);
1114    $user   = base64_decode($user);
1115    return array($user,$sticky,$pass);
1116}
1117
1118//Setup VIM: ex: et ts=2 :
1119