xref: /dokuwiki/inc/auth.php (revision 8eafbfcb7ac89e193ce01bf8d8eca870b3c17ddd) 
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']) $_REQUEST['r'] = false;
72
73    // handle renamed HTTP_AUTHORIZATION variable (can happen when a fix like
74    // the one presented at
75    // http://www.besthostratings.com/articles/http-auth-php-cgi.html is used
76    // for enabling HTTP authentication with CGI/SuExec)
77    if(isset($_SERVER['REDIRECT_HTTP_AUTHORIZATION']))
78        $_SERVER['HTTP_AUTHORIZATION'] = $_SERVER['REDIRECT_HTTP_AUTHORIZATION'];
79    // streamline HTTP auth credentials (IIS/rewrite -> mod_php)
80    if(isset($_SERVER['HTTP_AUTHORIZATION'])){
81        list($_SERVER['PHP_AUTH_USER'],$_SERVER['PHP_AUTH_PW']) =
82            explode(':', base64_decode(substr($_SERVER['HTTP_AUTHORIZATION'], 6)));
83    }
84
85    // if no credentials were given try to use HTTP auth (for SSO)
86    if(empty($_REQUEST['u']) && empty($_COOKIE[DOKU_COOKIE]) && !empty($_SERVER['PHP_AUTH_USER'])){
87        $_REQUEST['u'] = $_SERVER['PHP_AUTH_USER'];
88        $_REQUEST['p'] = $_SERVER['PHP_AUTH_PW'];
89        $_REQUEST['http_credentials'] = true;
90    }
91
92    // apply cleaning
93    $_REQUEST['u'] = $auth->cleanUser($_REQUEST['u']);
94
95    if(isset($_REQUEST['authtok'])){
96        // when an authentication token is given, trust the session
97        auth_validateToken($_REQUEST['authtok']);
98    }elseif(!is_null($auth) && $auth->canDo('external')){
99        // external trust mechanism in place
100        $auth->trustExternal($_REQUEST['u'],$_REQUEST['p'],$_REQUEST['r']);
101    }else{
102        $evdata = array(
103                'user'     => $_REQUEST['u'],
104                'password' => $_REQUEST['p'],
105                'sticky'   => $_REQUEST['r'],
106                'silent'   => $_REQUEST['http_credentials'],
107                );
108        trigger_event('AUTH_LOGIN_CHECK', $evdata, 'auth_login_wrapper');
109    }
110
111    //load ACL into a global array XXX
112    $AUTH_ACL = auth_loadACL();
113}
114
115/**
116 * Loads the ACL setup and handle user wildcards
117 *
118 * @author Andreas Gohr <andi@splitbrain.org>
119 * @returns array
120 */
121function auth_loadACL(){
122    global $config_cascade;
123
124    if(!is_readable($config_cascade['acl']['default'])) return array();
125
126    $acl = file($config_cascade['acl']['default']);
127
128    //support user wildcard
129    if(isset($_SERVER['REMOTE_USER'])){
130        $len = count($acl);
131        for($i=0; $i<$len; $i++){
132            if($acl[$i]{0} == '#') continue;
133            list($id,$rest) = preg_split('/\s+/',$acl[$i],2);
134            $id   = str_replace('%USER%',cleanID($_SERVER['REMOTE_USER']),$id);
135            $rest = str_replace('%USER%',auth_nameencode($_SERVER['REMOTE_USER']),$rest);
136            $acl[$i] = "$id\t$rest";
137        }
138    }
139    return $acl;
140}
141
142function auth_login_wrapper($evdata) {
143    return auth_login($evdata['user'],
144                      $evdata['password'],
145                      $evdata['sticky'],
146                      $evdata['silent']);
147}
148
149/**
150 * This tries to login the user based on the sent auth credentials
151 *
152 * The authentication works like this: if a username was given
153 * a new login is assumed and user/password are checked. If they
154 * are correct the password is encrypted with blowfish and stored
155 * together with the username in a cookie - the same info is stored
156 * in the session, too. Additonally a browserID is stored in the
157 * session.
158 *
159 * If no username was given the cookie is checked: if the username,
160 * crypted password and browserID match between session and cookie
161 * no further testing is done and the user is accepted
162 *
163 * If a cookie was found but no session info was availabe the
164 * blowfish encrypted password from the cookie is decrypted and
165 * together with username rechecked by calling this function again.
166 *
167 * On a successful login $_SERVER[REMOTE_USER] and $USERINFO
168 * are set.
169 *
170 * @author  Andreas Gohr <andi@splitbrain.org>
171 *
172 * @param   string  $user    Username
173 * @param   string  $pass    Cleartext Password
174 * @param   bool    $sticky  Cookie should not expire
175 * @param   bool    $silent  Don't show error on bad auth
176 * @return  bool             true on successful auth
177 */
178function auth_login($user,$pass,$sticky=false,$silent=false){
179    global $USERINFO;
180    global $conf;
181    global $lang;
182    global $auth;
183    $sticky ? $sticky = true : $sticky = false; //sanity check
184
185    if (!$auth) return false;
186
187    if(!empty($user)){
188        //usual login
189        if ($auth->checkPass($user,$pass)){
190            // make logininfo globally available
191            $_SERVER['REMOTE_USER'] = $user;
192            $secret = auth_cookiesalt(!$sticky); //bind non-sticky to session
193            auth_setCookie($user,PMA_blowfish_encrypt($pass,$secret),$sticky);
194            return true;
195        }else{
196            //invalid credentials - log off
197            if(!$silent) msg($lang['badlogin'],-1);
198            auth_logoff();
199            return false;
200        }
201    }else{
202        // read cookie information
203        list($user,$sticky,$pass) = auth_getCookie();
204        if($user && $pass){
205            // we got a cookie - see if we can trust it
206
207            // get session info
208            $session = $_SESSION[DOKU_COOKIE]['auth'];
209            if(isset($session) &&
210                    $auth->useSessionCache($user) &&
211                    ($session['time'] >= time()-$conf['auth_security_timeout']) &&
212                    ($session['user'] == $user) &&
213                    ($session['pass'] == sha1($pass)) &&  //still crypted
214                    ($session['buid'] == auth_browseruid()) ){
215
216                // he has session, cookie and browser right - let him in
217                $_SERVER['REMOTE_USER'] = $user;
218                $USERINFO = $session['info']; //FIXME move all references to session
219                return true;
220            }
221            // no we don't trust it yet - recheck pass but silent
222            $secret = auth_cookiesalt(!$sticky); //bind non-sticky to session
223            $pass = PMA_blowfish_decrypt($pass,$secret);
224            return auth_login($user,$pass,$sticky,true);
225        }
226    }
227    //just to be sure
228    auth_logoff(true);
229    return false;
230}
231
232/**
233 * Checks if a given authentication token was stored in the session
234 *
235 * Will setup authentication data using data from the session if the
236 * token is correct. Will exit with a 401 Status if not.
237 *
238 * @author Andreas Gohr <andi@splitbrain.org>
239 * @param  string $token The authentication token
240 * @return boolean true (or will exit on failure)
241 */
242function auth_validateToken($token){
243    if(!$token || $token != $_SESSION[DOKU_COOKIE]['auth']['token']){
244        // bad token
245        header("HTTP/1.0 401 Unauthorized");
246        print 'Invalid auth token - maybe the session timed out';
247        unset($_SESSION[DOKU_COOKIE]['auth']['token']); // no second chance
248        exit;
249    }
250    // still here? trust the session data
251    global $USERINFO;
252    $_SERVER['REMOTE_USER'] = $_SESSION[DOKU_COOKIE]['auth']['user'];
253    $USERINFO = $_SESSION[DOKU_COOKIE]['auth']['info'];
254    return true;
255}
256
257/**
258 * Create an auth token and store it in the session
259 *
260 * NOTE: this is completely unrelated to the getSecurityToken() function
261 *
262 * @author Andreas Gohr <andi@splitbrain.org>
263 * @return string The auth token
264 */
265function auth_createToken(){
266    $token = md5(mt_rand());
267    @session_start(); // reopen the session if needed
268    $_SESSION[DOKU_COOKIE]['auth']['token'] = $token;
269    session_write_close();
270    return $token;
271}
272
273/**
274 * Builds a pseudo UID from browser and IP data
275 *
276 * This is neither unique nor unfakable - still it adds some
277 * security. Using the first part of the IP makes sure
278 * proxy farms like AOLs are stil okay.
279 *
280 * @author  Andreas Gohr <andi@splitbrain.org>
281 *
282 * @return  string  a MD5 sum of various browser headers
283 */
284function auth_browseruid(){
285    $ip   = clientIP(true);
286    $uid  = '';
287    $uid .= $_SERVER['HTTP_USER_AGENT'];
288    $uid .= $_SERVER['HTTP_ACCEPT_ENCODING'];
289    $uid .= $_SERVER['HTTP_ACCEPT_LANGUAGE'];
290    $uid .= $_SERVER['HTTP_ACCEPT_CHARSET'];
291    $uid .= substr($ip,0,strpos($ip,'.'));
292    return md5($uid);
293}
294
295/**
296 * Creates a random key to encrypt the password in cookies
297 *
298 * This function tries to read the password for encrypting
299 * cookies from $conf['metadir'].'/_htcookiesalt'
300 * if no such file is found a random key is created and
301 * and stored in this file.
302 *
303 * @author  Andreas Gohr <andi@splitbrain.org>
304 * @param   bool $addsession if true, the sessionid is added to the salt
305 * @return  string
306 */
307function auth_cookiesalt($addsession=false){
308    global $conf;
309    $file = $conf['metadir'].'/_htcookiesalt';
310    $salt = io_readFile($file);
311    if(empty($salt)){
312        $salt = uniqid(rand(),true);
313        io_saveFile($file,$salt);
314    }
315    if($addsession){
316        $salt .= session_id();
317    }
318    return $salt;
319}
320
321/**
322 * Log out the current user
323 *
324 * This clears all authentication data and thus log the user
325 * off. It also clears session data.
326 *
327 * @author  Andreas Gohr <andi@splitbrain.org>
328 * @param bool $keepbc - when true, the breadcrumb data is not cleared
329 */
330function auth_logoff($keepbc=false){
331    global $conf;
332    global $USERINFO;
333    global $INFO, $ID;
334    global $auth;
335
336    // make sure the session is writable (it usually is)
337    @session_start();
338
339    if(isset($_SESSION[DOKU_COOKIE]['auth']['user']))
340        unset($_SESSION[DOKU_COOKIE]['auth']['user']);
341    if(isset($_SESSION[DOKU_COOKIE]['auth']['pass']))
342        unset($_SESSION[DOKU_COOKIE]['auth']['pass']);
343    if(isset($_SESSION[DOKU_COOKIE]['auth']['info']))
344        unset($_SESSION[DOKU_COOKIE]['auth']['info']);
345    if(!$keepbc && isset($_SESSION[DOKU_COOKIE]['bc']))
346        unset($_SESSION[DOKU_COOKIE]['bc']);
347    if(isset($_SERVER['REMOTE_USER']))
348        unset($_SERVER['REMOTE_USER']);
349    $USERINFO=null; //FIXME
350
351    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
352        setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
353    }else{
354        setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
355    }
356
357    if($auth) $auth->logOff();
358}
359
360/**
361 * Check if a user is a manager
362 *
363 * Should usually be called without any parameters to check the current
364 * user.
365 *
366 * The info is available through $INFO['ismanager'], too
367 *
368 * @author Andreas Gohr <andi@splitbrain.org>
369 * @see    auth_isadmin
370 * @param  string user      - Username
371 * @param  array  groups    - List of groups the user is in
372 * @param  bool   adminonly - when true checks if user is admin
373 */
374function auth_ismanager($user=null,$groups=null,$adminonly=false){
375    global $conf;
376    global $USERINFO;
377    global $auth;
378
379    if (!$auth) return false;
380    if(is_null($user)) {
381        if (!isset($_SERVER['REMOTE_USER'])) {
382            return false;
383        } else {
384            $user = $_SERVER['REMOTE_USER'];
385        }
386    }
387    if(is_null($groups)){
388        $groups = (array) $USERINFO['grps'];
389    }
390
391    // check superuser match
392    if(auth_isMember($conf['superuser'],$user, $groups)) return true;
393    if($adminonly) return false;
394    // check managers
395    if(auth_isMember($conf['manager'],$user, $groups)) return true;
396
397    return false;
398}
399
400/**
401 * Check if a user is admin
402 *
403 * Alias to auth_ismanager with adminonly=true
404 *
405 * The info is available through $INFO['isadmin'], too
406 *
407 * @author Andreas Gohr <andi@splitbrain.org>
408 * @see auth_ismanager
409 */
410function auth_isadmin($user=null,$groups=null){
411    return auth_ismanager($user,$groups,true);
412}
413
414
415/**
416 * Match a user and his groups against a comma separated list of
417 * users and groups to determine membership status
418 *
419 * Note: all input should NOT be nameencoded.
420 *
421 * @param $memberlist string commaseparated list of allowed users and groups
422 * @param $user       string user to match against
423 * @param $groups     array  groups the user is member of
424 * @returns bool      true for membership acknowledged
425 */
426function auth_isMember($memberlist,$user,array $groups){
427    global $auth;
428    if (!$auth) return false;
429
430    // clean user and groups
431    if(!$auth->isCaseSensitive()){
432        $user = utf8_strtolower($user);
433        $groups = array_map('utf8_strtolower',$groups);
434    }
435    $user = $auth->cleanUser($user);
436    $groups = array_map(array($auth,'cleanGroup'),$groups);
437
438    // extract the memberlist
439    $members = explode(',',$memberlist);
440    $members = array_map('trim',$members);
441    $members = array_unique($members);
442    $members = array_filter($members);
443
444    // compare cleaned values
445    foreach($members as $member){
446        if(!$auth->isCaseSensitive()) $member = utf8_strtolower($member);
447        if($member[0] == '@'){
448            $member = $auth->cleanGroup(substr($member,1));
449            if(in_array($member, $groups)) return true;
450        }else{
451            $member = $auth->cleanUser($member);
452            if($member == $user) return true;
453        }
454    }
455
456    // still here? not a member!
457    return false;
458}
459
460/**
461 * Convinience function for auth_aclcheck()
462 *
463 * This checks the permissions for the current user
464 *
465 * @author  Andreas Gohr <andi@splitbrain.org>
466 *
467 * @param  string  $id  page ID (needs to be resolved and cleaned)
468 * @return int          permission level
469 */
470function auth_quickaclcheck($id){
471    global $conf;
472    global $USERINFO;
473    # if no ACL is used always return upload rights
474    if(!$conf['useacl']) return AUTH_UPLOAD;
475    return auth_aclcheck($id,$_SERVER['REMOTE_USER'],$USERINFO['grps']);
476}
477
478/**
479 * Returns the maximum rights a user has for
480 * the given ID or its namespace
481 *
482 * @author  Andreas Gohr <andi@splitbrain.org>
483 *
484 * @param  string  $id     page ID (needs to be resolved and cleaned)
485 * @param  string  $user   Username
486 * @param  array   $groups Array of groups the user is in
487 * @return int             permission level
488 */
489function auth_aclcheck($id,$user,$groups){
490    global $conf;
491    global $AUTH_ACL;
492    global $auth;
493
494    // if no ACL is used always return upload rights
495    if(!$conf['useacl']) return AUTH_UPLOAD;
496    if (!$auth) return AUTH_NONE;
497
498    //make sure groups is an array
499    if(!is_array($groups)) $groups = array();
500
501    //if user is superuser or in superusergroup return 255 (acl_admin)
502    if(auth_isadmin($user,$groups)) { return AUTH_ADMIN; }
503
504    $ci = '';
505    if(!$auth->isCaseSensitive()) $ci = 'ui';
506
507    $user = $auth->cleanUser($user);
508    $groups = array_map(array($auth,'cleanGroup'),(array)$groups);
509    $user = auth_nameencode($user);
510
511    //prepend groups with @ and nameencode
512    $cnt = count($groups);
513    for($i=0; $i<$cnt; $i++){
514        $groups[$i] = '@'.auth_nameencode($groups[$i]);
515    }
516
517    $ns    = getNS($id);
518    $perm  = -1;
519
520    if($user || count($groups)){
521        //add ALL group
522        $groups[] = '@ALL';
523        //add User
524        if($user) $groups[] = $user;
525        //build regexp
526        $regexp   = join('|',$groups);
527    }else{
528        $regexp = '@ALL';
529    }
530
531    //check exact match first
532    $matches = preg_grep('/^'.preg_quote($id,'/').'\s+('.$regexp.')\s+/'.$ci,$AUTH_ACL);
533    if(count($matches)){
534        foreach($matches as $match){
535            $match = preg_replace('/#.*$/','',$match); //ignore comments
536            $acl   = preg_split('/\s+/',$match);
537            if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
538            if($acl[2] > $perm){
539                $perm = $acl[2];
540            }
541        }
542        if($perm > -1){
543            //we had a match - return it
544            return $perm;
545        }
546    }
547
548    //still here? do the namespace checks
549    if($ns){
550        $path = $ns.':*';
551    }else{
552        $path = '*'; //root document
553    }
554
555    do{
556        $matches = preg_grep('/^'.preg_quote($path,'/').'\s+('.$regexp.')\s+/'.$ci,$AUTH_ACL);
557        if(count($matches)){
558            foreach($matches as $match){
559                $match = preg_replace('/#.*$/','',$match); //ignore comments
560                $acl   = preg_split('/\s+/',$match);
561                if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
562                if($acl[2] > $perm){
563                    $perm = $acl[2];
564                }
565            }
566            //we had a match - return it
567            return $perm;
568        }
569
570        //get next higher namespace
571        $ns   = getNS($ns);
572
573        if($path != '*'){
574            $path = $ns.':*';
575            if($path == ':*') $path = '*';
576        }else{
577            //we did this already
578            //looks like there is something wrong with the ACL
579            //break here
580            msg('No ACL setup yet! Denying access to everyone.');
581            return AUTH_NONE;
582        }
583    }while(1); //this should never loop endless
584
585    //still here? return no permissions
586    return AUTH_NONE;
587}
588
589/**
590 * Encode ASCII special chars
591 *
592 * Some auth backends allow special chars in their user and groupnames
593 * The special chars are encoded with this function. Only ASCII chars
594 * are encoded UTF-8 multibyte are left as is (different from usual
595 * urlencoding!).
596 *
597 * Decoding can be done with rawurldecode
598 *
599 * @author Andreas Gohr <gohr@cosmocode.de>
600 * @see rawurldecode()
601 */
602function auth_nameencode($name,$skip_group=false){
603    global $cache_authname;
604    $cache =& $cache_authname;
605    $name  = (string) $name;
606
607    // never encode wildcard FS#1955
608    if($name == '%USER%') return $name;
609
610    if (!isset($cache[$name][$skip_group])) {
611        if($skip_group && $name{0} =='@'){
612            $cache[$name][$skip_group] = '@'.preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
613                    "'%'.dechex(ord(substr('\\1',-1)))",substr($name,1));
614        }else{
615            $cache[$name][$skip_group] = preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
616                    "'%'.dechex(ord(substr('\\1',-1)))",$name);
617        }
618    }
619
620    return $cache[$name][$skip_group];
621}
622
623/**
624 * Create a pronouncable password
625 *
626 * @author  Andreas Gohr <andi@splitbrain.org>
627 * @link    http://www.phpbuilder.com/annotate/message.php3?id=1014451
628 *
629 * @return string  pronouncable password
630 */
631function auth_pwgen(){
632    $pw = '';
633    $c  = 'bcdfghjklmnprstvwz'; //consonants except hard to speak ones
634    $v  = 'aeiou';              //vowels
635    $a  = $c.$v;                //both
636
637    //use two syllables...
638    for($i=0;$i < 2; $i++){
639        $pw .= $c[rand(0, strlen($c)-1)];
640        $pw .= $v[rand(0, strlen($v)-1)];
641        $pw .= $a[rand(0, strlen($a)-1)];
642    }
643    //... and add a nice number
644    $pw .= rand(10,99);
645
646    return $pw;
647}
648
649/**
650 * Sends a password to the given user
651 *
652 * @author  Andreas Gohr <andi@splitbrain.org>
653 *
654 * @return bool  true on success
655 */
656function auth_sendPassword($user,$password){
657    global $conf;
658    global $lang;
659    global $auth;
660    if (!$auth) return false;
661
662    $hdrs  = '';
663    $user     = $auth->cleanUser($user);
664    $userinfo = $auth->getUserData($user);
665
666    if(!$userinfo['mail']) return false;
667
668    $text = rawLocale('password');
669    $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
670    $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
671    $text = str_replace('@LOGIN@',$user,$text);
672    $text = str_replace('@PASSWORD@',$password,$text);
673    $text = str_replace('@TITLE@',$conf['title'],$text);
674
675    return mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
676            $lang['regpwmail'],
677            $text,
678            $conf['mailfrom']);
679}
680
681/**
682 * Register a new user
683 *
684 * This registers a new user - Data is read directly from $_POST
685 *
686 * @author  Andreas Gohr <andi@splitbrain.org>
687 *
688 * @return bool  true on success, false on any error
689 */
690function register(){
691    global $lang;
692    global $conf;
693    global $auth;
694
695    if(!$_POST['save']) return false;
696    if(!actionOK('register')) return false;
697
698    //clean username
699    $_POST['login'] = trim($auth->cleanUser($_POST['login']));
700
701    //clean fullname and email
702    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
703    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
704
705    if( empty($_POST['login']) ||
706        empty($_POST['fullname']) ||
707        empty($_POST['email']) ){
708        msg($lang['regmissing'],-1);
709        return false;
710    }
711
712    if ($conf['autopasswd']) {
713        $pass = auth_pwgen();                // automatically generate password
714    } elseif (empty($_POST['pass']) ||
715            empty($_POST['passchk'])) {
716        msg($lang['regmissing'], -1);        // complain about missing passwords
717        return false;
718    } elseif ($_POST['pass'] != $_POST['passchk']) {
719        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
720        return false;
721    } else {
722        $pass = $_POST['pass'];              // accept checked and valid password
723    }
724
725    //check mail
726    if(!mail_isvalid($_POST['email'])){
727        msg($lang['regbadmail'],-1);
728        return false;
729    }
730
731    //okay try to create the user
732    if(!$auth->triggerUserMod('create', array($_POST['login'],$pass,$_POST['fullname'],$_POST['email']))){
733        msg($lang['reguexists'],-1);
734        return false;
735    }
736
737    // create substitutions for use in notification email
738    $substitutions = array(
739            'NEWUSER' => $_POST['login'],
740            'NEWNAME' => $_POST['fullname'],
741            'NEWEMAIL' => $_POST['email'],
742            );
743
744    if (!$conf['autopasswd']) {
745        msg($lang['regsuccess2'],1);
746        notify('', 'register', '', $_POST['login'], false, $substitutions);
747        return true;
748    }
749
750    // autogenerated password? then send him the password
751    if (auth_sendPassword($_POST['login'],$pass)){
752        msg($lang['regsuccess'],1);
753        notify('', 'register', '', $_POST['login'], false, $substitutions);
754        return true;
755    }else{
756        msg($lang['regmailfail'],-1);
757        return false;
758    }
759}
760
761/**
762 * Update user profile
763 *
764 * @author    Christopher Smith <chris@jalakai.co.uk>
765 */
766function updateprofile() {
767    global $conf;
768    global $INFO;
769    global $lang;
770    global $auth;
771
772    if(empty($_POST['save'])) return false;
773    if(!checkSecurityToken()) return false;
774
775    if(!actionOK('profile')) {
776        msg($lang['profna'],-1);
777        return false;
778    }
779
780    if ($_POST['newpass'] != $_POST['passchk']) {
781        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
782        return false;
783    }
784
785    //clean fullname and email
786    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
787    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
788
789    if ((empty($_POST['fullname']) && $auth->canDo('modName')) ||
790        (empty($_POST['email']) && $auth->canDo('modMail'))) {
791        msg($lang['profnoempty'],-1);
792        return false;
793    }
794
795    if (!mail_isvalid($_POST['email']) && $auth->canDo('modMail')){
796        msg($lang['regbadmail'],-1);
797        return false;
798    }
799
800    if ($_POST['fullname'] != $INFO['userinfo']['name'] && $auth->canDo('modName')) $changes['name'] = $_POST['fullname'];
801    if ($_POST['email'] != $INFO['userinfo']['mail'] && $auth->canDo('modMail')) $changes['mail'] = $_POST['email'];
802    if (!empty($_POST['newpass']) && $auth->canDo('modPass')) $changes['pass'] = $_POST['newpass'];
803
804    if (!count($changes)) {
805        msg($lang['profnochange'], -1);
806        return false;
807    }
808
809    if ($conf['profileconfirm']) {
810        if (!$auth->checkPass($_SERVER['REMOTE_USER'], $_POST['oldpass'])) {
811            msg($lang['badlogin'],-1);
812            return false;
813        }
814    }
815
816    if ($result = $auth->triggerUserMod('modify', array($_SERVER['REMOTE_USER'], $changes))) {
817        // update cookie and session with the changed data
818        if ($changes['pass']){
819            list($user,$sticky,$pass) = auth_getCookie();
820            $pass = PMA_blowfish_encrypt($changes['pass'],auth_cookiesalt(!$sticky));
821            auth_setCookie($_SERVER['REMOTE_USER'],$pass,(bool)$sticky);
822        }
823        return true;
824    }
825}
826
827/**
828 * Send a  new password
829 *
830 * This function handles both phases of the password reset:
831 *
832 *   - handling the first request of password reset
833 *   - validating the password reset auth token
834 *
835 * @author Benoit Chesneau <benoit@bchesneau.info>
836 * @author Chris Smith <chris@jalakai.co.uk>
837 * @author Andreas Gohr <andi@splitbrain.org>
838 *
839 * @return bool true on success, false on any error
840 */
841function act_resendpwd(){
842    global $lang;
843    global $conf;
844    global $auth;
845
846    if(!actionOK('resendpwd')) {
847        msg($lang['resendna'],-1);
848        return false;
849    }
850
851    $token = preg_replace('/[^a-f0-9]+/','',$_REQUEST['pwauth']);
852
853    if($token){
854        // we're in token phase
855
856        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
857        if(!@file_exists($tfile)){
858            msg($lang['resendpwdbadauth'],-1);
859            return false;
860        }
861        $user = io_readfile($tfile);
862        @unlink($tfile);
863        $userinfo = $auth->getUserData($user);
864        if(!$userinfo['mail']) {
865            msg($lang['resendpwdnouser'], -1);
866            return false;
867        }
868
869        $pass = auth_pwgen();
870        if (!$auth->triggerUserMod('modify', array($user,array('pass' => $pass)))) {
871            msg('error modifying user data',-1);
872            return false;
873        }
874
875        if (auth_sendPassword($user,$pass)) {
876            msg($lang['resendpwdsuccess'],1);
877        } else {
878            msg($lang['regmailfail'],-1);
879        }
880        return true;
881
882    } else {
883        // we're in request phase
884
885        if(!$_POST['save']) return false;
886
887        if (empty($_POST['login'])) {
888            msg($lang['resendpwdmissing'], -1);
889            return false;
890        } else {
891            $user = trim($auth->cleanUser($_POST['login']));
892        }
893
894        $userinfo = $auth->getUserData($user);
895        if(!$userinfo['mail']) {
896            msg($lang['resendpwdnouser'], -1);
897            return false;
898        }
899
900        // generate auth token
901        $token = md5(auth_cookiesalt().$user); //secret but user based
902        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
903        $url = wl('',array('do'=>'resendpwd','pwauth'=>$token),true,'&');
904
905        io_saveFile($tfile,$user);
906
907        $text = rawLocale('pwconfirm');
908        $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
909        $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
910        $text = str_replace('@LOGIN@',$user,$text);
911        $text = str_replace('@TITLE@',$conf['title'],$text);
912        $text = str_replace('@CONFIRM@',$url,$text);
913
914        if(mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
915                     $lang['regpwmail'],
916                     $text,
917                     $conf['mailfrom'])){
918            msg($lang['resendpwdconfirm'],1);
919        }else{
920            msg($lang['regmailfail'],-1);
921        }
922        return true;
923    }
924
925    return false; // never reached
926}
927
928/**
929 * Encrypts a password using the given method and salt
930 *
931 * If the selected method needs a salt and none was given, a random one
932 * is chosen.
933 *
934 * @author  Andreas Gohr <andi@splitbrain.org>
935 * @return  string  The crypted password
936 */
937function auth_cryptPassword($clear,$method='',$salt=null){
938    global $conf;
939    if(empty($method)) $method = $conf['passcrypt'];
940
941    $pass  = new PassHash();
942    $call  = 'hash_'.$method;
943
944    if(!method_exists($pass,$call)){
945        msg("Unsupported crypt method $method",-1);
946        return false;
947    }
948
949    return $pass->$call($clear,$salt);
950}
951
952/**
953 * Verifies a cleartext password against a crypted hash
954 *
955 * @author  Andreas Gohr <andi@splitbrain.org>
956 * @return  bool
957 */
958function auth_verifyPassword($clear,$crypt){
959    $pass = new PassHash();
960    return $pass->verify_hash($clear,$crypt);
961}
962
963/**
964 * Set the authentication cookie and add user identification data to the session
965 *
966 * @param string  $user       username
967 * @param string  $pass       encrypted password
968 * @param bool    $sticky     whether or not the cookie will last beyond the session
969 */
970function auth_setCookie($user,$pass,$sticky) {
971    global $conf;
972    global $auth;
973    global $USERINFO;
974
975    if (!$auth) return false;
976    $USERINFO = $auth->getUserData($user);
977
978    // set cookie
979    $cookie = base64_encode($user).'|'.((int) $sticky).'|'.base64_encode($pass);
980    $time = $sticky ? (time()+60*60*24*365) : 0; //one year
981    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
982        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
983    }else{
984        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
985    }
986    // set session
987    $_SESSION[DOKU_COOKIE]['auth']['user'] = $user;
988    $_SESSION[DOKU_COOKIE]['auth']['pass'] = sha1($pass);
989    $_SESSION[DOKU_COOKIE]['auth']['buid'] = auth_browseruid();
990    $_SESSION[DOKU_COOKIE]['auth']['info'] = $USERINFO;
991    $_SESSION[DOKU_COOKIE]['auth']['time'] = time();
992}
993
994/**
995 * Returns the user, (encrypted) password and sticky bit from cookie
996 *
997 * @returns array
998 */
999function auth_getCookie(){
1000    if (!isset($_COOKIE[DOKU_COOKIE])) {
1001        return array(null, null, null);
1002    }
1003    list($user,$sticky,$pass) = explode('|',$_COOKIE[DOKU_COOKIE],3);
1004    $sticky = (bool) $sticky;
1005    $pass   = base64_decode($pass);
1006    $user   = base64_decode($user);
1007    return array($user,$sticky,$pass);
1008}
1009
1010//Setup VIM: ex: et ts=2 :
1011