xref: /dokuwiki/inc/auth.php (revision 191bb90af90d4b063435ee55d67082e7453ed1fb) 
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.');
13require_once(DOKU_INC.'inc/common.php');
14require_once(DOKU_INC.'inc/io.php');
15
16// some ACL level defines
17define('AUTH_NONE',0);
18define('AUTH_READ',1);
19define('AUTH_EDIT',2);
20define('AUTH_CREATE',4);
21define('AUTH_UPLOAD',8);
22define('AUTH_DELETE',16);
23define('AUTH_ADMIN',255);
24
25global $conf;
26
27if($conf['useacl']){
28    require_once(DOKU_INC.'inc/blowfish.php');
29    require_once(DOKU_INC.'inc/mail.php');
30
31    global $auth;
32
33    // load the the backend auth functions and instantiate the auth object
34    if (@file_exists(DOKU_INC.'inc/auth/'.$conf['authtype'].'.class.php')) {
35        require_once(DOKU_INC.'inc/auth/basic.class.php');
36        require_once(DOKU_INC.'inc/auth/'.$conf['authtype'].'.class.php');
37
38        $auth_class = "auth_".$conf['authtype'];
39        if (class_exists($auth_class)) {
40            $auth = new $auth_class();
41            if ($auth->success == false) {
42                // degrade to unauthenticated user
43                unset($auth);
44                auth_logoff();
45                msg($lang['authtempfail'], -1);
46            }
47        } else {
48            nice_die($lang['authmodfailed']);
49        }
50    } else {
51        nice_die($lang['authmodfailed']);
52    }
53}
54
55// do the login either by cookie or provided credentials
56if($conf['useacl']){
57    if($auth){
58        if (!isset($_REQUEST['u'])) $_REQUEST['u'] = '';
59        if (!isset($_REQUEST['p'])) $_REQUEST['p'] = '';
60        if (!isset($_REQUEST['r'])) $_REQUEST['r'] = '';
61        $_REQUEST['http_credentials'] = false;
62        if (!$conf['rememberme']) $_REQUEST['r'] = false;
63
64        // streamline HTTP auth credentials (IIS/rewrite -> mod_php)
65        if(isset($_SERVER['HTTP_AUTHORIZATION'])){
66            list($_SERVER['PHP_AUTH_USER'],$_SERVER['PHP_AUTH_PW']) =
67                explode(':', base64_decode(substr($_SERVER['HTTP_AUTHORIZATION'], 6)));
68        }
69
70        // if no credentials were given try to use HTTP auth (for SSO)
71        if(empty($_REQUEST['u']) && empty($_COOKIE[DOKU_COOKIE]) && !empty($_SERVER['PHP_AUTH_USER'])){
72            $_REQUEST['u'] = $_SERVER['PHP_AUTH_USER'];
73            $_REQUEST['p'] = $_SERVER['PHP_AUTH_PW'];
74            $_REQUEST['http_credentials'] = true;
75        }
76
77        // apply cleaning
78        $_REQUEST['u'] = $auth->cleanUser($_REQUEST['u']);
79
80        if(isset($_REQUEST['authtok'])){
81            // when an authentication token is given, trust the session
82            auth_validateToken($_REQUEST['authtok']);
83        }elseif(!is_null($auth) && $auth->canDo('external')){
84            // external trust mechanism in place
85            $auth->trustExternal($_REQUEST['u'],$_REQUEST['p'],$_REQUEST['r']);
86        }else{
87            $evdata = array(
88                    'user'     => $_REQUEST['u'],
89                    'password' => $_REQUEST['p'],
90                    'sticky'   => $_REQUEST['r'],
91                    'silent'   => $_REQUEST['http_credentials'],
92                    );
93            $evt = new Doku_Event('AUTH_LOGIN_CHECK',$evdata);
94            if($evt->advise_before()){
95                auth_login($evdata['user'],
96                           $evdata['password'],
97                           $evdata['sticky'],
98                           $evdata['silent']);
99            }
100        }
101    }
102
103    //load ACL into a global array
104    global $AUTH_ACL;
105    if(is_readable(DOKU_CONF.'acl.auth.php')){
106        $AUTH_ACL = file(DOKU_CONF.'acl.auth.php');
107        //support user wildcard
108        if(isset($_SERVER['REMOTE_USER'])){
109            $AUTH_ACL = str_replace('%USER%',$_SERVER['REMOTE_USER'],$AUTH_ACL);
110            $AUTH_ACL = str_replace('@USER@',$_SERVER['REMOTE_USER'],$AUTH_ACL); //legacy
111        }
112    }else{
113        $AUTH_ACL = array();
114    }
115}
116
117/**
118 * This tries to login the user based on the sent auth credentials
119 *
120 * The authentication works like this: if a username was given
121 * a new login is assumed and user/password are checked. If they
122 * are correct the password is encrypted with blowfish and stored
123 * together with the username in a cookie - the same info is stored
124 * in the session, too. Additonally a browserID is stored in the
125 * session.
126 *
127 * If no username was given the cookie is checked: if the username,
128 * crypted password and browserID match between session and cookie
129 * no further testing is done and the user is accepted
130 *
131 * If a cookie was found but no session info was availabe the
132 * blowfish encrypted password from the cookie is decrypted and
133 * together with username rechecked by calling this function again.
134 *
135 * On a successful login $_SERVER[REMOTE_USER] and $USERINFO
136 * are set.
137 *
138 * @author  Andreas Gohr <andi@splitbrain.org>
139 *
140 * @param   string  $user    Username
141 * @param   string  $pass    Cleartext Password
142 * @param   bool    $sticky  Cookie should not expire
143 * @param   bool    $silent  Don't show error on bad auth
144 * @return  bool             true on successful auth
145 */
146function auth_login($user,$pass,$sticky=false,$silent=false){
147    global $USERINFO;
148    global $conf;
149    global $lang;
150    global $auth;
151    $sticky ? $sticky = true : $sticky = false; //sanity check
152
153    if(!empty($user)){
154        //usual login
155        if ($auth->checkPass($user,$pass)){
156            // make logininfo globally available
157            $_SERVER['REMOTE_USER'] = $user;
158            auth_setCookie($user,PMA_blowfish_encrypt($pass,auth_cookiesalt()),$sticky);
159            return true;
160        }else{
161            //invalid credentials - log off
162            if(!$silent) msg($lang['badlogin'],-1);
163            auth_logoff();
164            return false;
165        }
166    }else{
167        // read cookie information
168        list($user,$sticky,$pass) = auth_getCookie();
169        // get session info
170        $session = $_SESSION[DOKU_COOKIE]['auth'];
171        if($user && $pass){
172            // we got a cookie - see if we can trust it
173            if(isset($session) &&
174                    $auth->useSessionCache($user) &&
175                    ($session['time'] >= time()-$conf['auth_security_timeout']) &&
176                    ($session['user'] == $user) &&
177                    ($session['pass'] == $pass) &&  //still crypted
178                    ($session['buid'] == auth_browseruid()) ){
179                // he has session, cookie and browser right - let him in
180                $_SERVER['REMOTE_USER'] = $user;
181                $USERINFO = $session['info']; //FIXME move all references to session
182                return true;
183            }
184            // no we don't trust it yet - recheck pass but silent
185            $pass = PMA_blowfish_decrypt($pass,auth_cookiesalt());
186            return auth_login($user,$pass,$sticky,true);
187        }
188    }
189    //just to be sure
190    auth_logoff(true);
191    return false;
192}
193
194/**
195 * Checks if a given authentication token was stored in the session
196 *
197 * Will setup authentication data using data from the session if the
198 * token is correct. Will exit with a 401 Status if not.
199 *
200 * @author Andreas Gohr <andi@splitbrain.org>
201 * @param  string $token The authentication token
202 * @return boolean true (or will exit on failure)
203 */
204function auth_validateToken($token){
205    if(!$token || $token != $_SESSION[DOKU_COOKIE]['auth']['token']){
206        // bad token
207        header("HTTP/1.0 401 Unauthorized");
208        print 'Invalid auth token - maybe the session timed out';
209        unset($_SESSION[DOKU_COOKIE]['auth']['token']); // no second chance
210        exit;
211    }
212    // still here? trust the session data
213    global $USERINFO;
214    $_SERVER['REMOTE_USER'] = $_SESSION[DOKU_COOKIE]['auth']['user'];
215    $USERINFO = $_SESSION[DOKU_COOKIE]['auth']['info'];
216    return true;
217}
218
219/**
220 * Create an auth token and store it in the session
221 *
222 * NOTE: this is completely unrelated to the getSecurityToken() function
223 *
224 * @author Andreas Gohr <andi@splitbrain.org>
225 * @return string The auth token
226 */
227function auth_createToken(){
228    $token = md5(mt_rand());
229    @session_start(); // reopen the session if needed
230    $_SESSION[DOKU_COOKIE]['auth']['token'] = $token;
231    session_write_close();
232    return $token;
233}
234
235/**
236 * Builds a pseudo UID from browser and IP data
237 *
238 * This is neither unique nor unfakable - still it adds some
239 * security. Using the first part of the IP makes sure
240 * proxy farms like AOLs are stil okay.
241 *
242 * @author  Andreas Gohr <andi@splitbrain.org>
243 *
244 * @return  string  a MD5 sum of various browser headers
245 */
246function auth_browseruid(){
247    $ip   = clientIP(true);
248    $uid  = '';
249    $uid .= $_SERVER['HTTP_USER_AGENT'];
250    $uid .= $_SERVER['HTTP_ACCEPT_ENCODING'];
251    $uid .= $_SERVER['HTTP_ACCEPT_LANGUAGE'];
252    $uid .= $_SERVER['HTTP_ACCEPT_CHARSET'];
253    $uid .= substr($ip,0,strpos($ip,'.'));
254    return md5($uid);
255}
256
257/**
258 * Creates a random key to encrypt the password in cookies
259 *
260 * This function tries to read the password for encrypting
261 * cookies from $conf['metadir'].'/_htcookiesalt'
262 * if no such file is found a random key is created and
263 * and stored in this file.
264 *
265 * @author  Andreas Gohr <andi@splitbrain.org>
266 *
267 * @return  string
268 */
269function auth_cookiesalt(){
270    global $conf;
271    $file = $conf['metadir'].'/_htcookiesalt';
272    $salt = io_readFile($file);
273    if(empty($salt)){
274        $salt = uniqid(rand(),true);
275        io_saveFile($file,$salt);
276    }
277    return $salt;
278}
279
280/**
281 * Log out the current user
282 *
283 * This clears all authentication data and thus log the user
284 * off. It also clears session data.
285 *
286 * @author  Andreas Gohr <andi@splitbrain.org>
287 * @param bool $keepbc - when true, the breadcrumb data is not cleared
288 */
289function auth_logoff($keepbc=false){
290    global $conf;
291    global $USERINFO;
292    global $INFO, $ID;
293    global $auth;
294
295    // make sure the session is writable (it usually is)
296    @session_start();
297
298    if(isset($_SESSION[DOKU_COOKIE]['auth']['user']))
299        unset($_SESSION[DOKU_COOKIE]['auth']['user']);
300    if(isset($_SESSION[DOKU_COOKIE]['auth']['pass']))
301        unset($_SESSION[DOKU_COOKIE]['auth']['pass']);
302    if(isset($_SESSION[DOKU_COOKIE]['auth']['info']))
303        unset($_SESSION[DOKU_COOKIE]['auth']['info']);
304    if(!$keepbc && isset($_SESSION[DOKU_COOKIE]['bc']))
305        unset($_SESSION[DOKU_COOKIE]['bc']);
306    if(isset($_SERVER['REMOTE_USER']))
307        unset($_SERVER['REMOTE_USER']);
308    $USERINFO=null; //FIXME
309
310    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
311        setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
312    }else{
313        setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
314    }
315
316    if($auth && $auth->canDo('logoff')){
317        $auth->logOff();
318    }
319}
320
321/**
322 * Check if a user is a manager
323 *
324 * Should usually be called without any parameters to check the current
325 * user.
326 *
327 * The info is available through $INFO['ismanager'], too
328 *
329 * @author Andreas Gohr <andi@splitbrain.org>
330 * @see    auth_isadmin
331 * @param  string user      - Username
332 * @param  array  groups    - List of groups the user is in
333 * @param  bool   adminonly - when true checks if user is admin
334 */
335function auth_ismanager($user=null,$groups=null,$adminonly=false){
336    global $conf;
337    global $USERINFO;
338
339    if(!$conf['useacl']) return false;
340    if(is_null($user)) {
341        if (!isset($_SERVER['REMOTE_USER'])) {
342            return false;
343        } else {
344            $user = $_SERVER['REMOTE_USER'];
345        }
346    }
347    if(is_null($groups)) $groups = (array) $USERINFO['grps'];
348    $user   = auth_nameencode($user);
349
350    // check username against superuser and manager
351    $superusers = explode(',', $conf['superuser']);
352    $superusers = array_unique($superusers);
353    $superusers = array_map('trim', $superusers);
354    // prepare an array containing only true values for array_map call
355    $alltrue = array_fill(0, count($superusers), true);
356    $superusers = array_map('auth_nameencode', $superusers, $alltrue);
357    if(in_array($user, $superusers)) return true;
358
359    if(!$adminonly){
360        $managers = explode(',', $conf['manager']);
361        $managers = array_unique($managers);
362        $managers = array_map('trim', $managers);
363        // prepare an array containing only true values for array_map call
364        $alltrue = array_fill(0, count($managers), true);
365        $managers = array_map('auth_nameencode', $managers, $alltrue);
366        if(in_array($user, $managers)) return true;
367    }
368
369    // check user's groups against superuser and manager
370    if (!empty($groups)) {
371
372        //prepend groups with @ and nameencode
373        $cnt = count($groups);
374        for($i=0; $i<$cnt; $i++){
375            $groups[$i] = '@'.auth_nameencode($groups[$i]);
376        }
377
378        // check groups against superuser and manager
379        foreach($superusers as $supu)
380            if(in_array($supu, $groups)) return true;
381        if(!$adminonly){
382            foreach($managers as $mana)
383                if(in_array($mana, $groups)) return true;
384        }
385    }
386
387    return false;
388}
389
390/**
391 * Check if a user is admin
392 *
393 * Alias to auth_ismanager with adminonly=true
394 *
395 * The info is available through $INFO['isadmin'], too
396 *
397 * @author Andreas Gohr <andi@splitbrain.org>
398 * @see auth_ismanager
399 */
400function auth_isadmin($user=null,$groups=null){
401    return auth_ismanager($user,$groups,true);
402}
403
404/**
405 * Convinience function for auth_aclcheck()
406 *
407 * This checks the permissions for the current user
408 *
409 * @author  Andreas Gohr <andi@splitbrain.org>
410 *
411 * @param  string  $id  page ID (needs to be resolved and cleaned)
412 * @return int          permission level
413 */
414function auth_quickaclcheck($id){
415    global $conf;
416    global $USERINFO;
417    # if no ACL is used always return upload rights
418    if(!$conf['useacl']) return AUTH_UPLOAD;
419    return auth_aclcheck($id,$_SERVER['REMOTE_USER'],$USERINFO['grps']);
420}
421
422/**
423 * Returns the maximum rights a user has for
424 * the given ID or its namespace
425 *
426 * @author  Andreas Gohr <andi@splitbrain.org>
427 *
428 * @param  string  $id     page ID (needs to be resolved and cleaned)
429 * @param  string  $user   Username
430 * @param  array   $groups Array of groups the user is in
431 * @return int             permission level
432 */
433function auth_aclcheck($id,$user,$groups){
434    global $conf;
435    global $AUTH_ACL;
436
437    // if no ACL is used always return upload rights
438    if(!$conf['useacl']) return AUTH_UPLOAD;
439
440    //make sure groups is an array
441    if(!is_array($groups)) $groups = array();
442
443    //if user is superuser or in superusergroup return 255 (acl_admin)
444    if(auth_isadmin($user,$groups)) { return AUTH_ADMIN; }
445
446    $user = auth_nameencode($user);
447
448    //prepend groups with @ and nameencode
449    $cnt = count($groups);
450    for($i=0; $i<$cnt; $i++){
451        $groups[$i] = '@'.auth_nameencode($groups[$i]);
452    }
453
454    $ns    = getNS($id);
455    $perm  = -1;
456
457    if($user || count($groups)){
458        //add ALL group
459        $groups[] = '@ALL';
460        //add User
461        if($user) $groups[] = $user;
462        //build regexp
463        $regexp   = join('|',$groups);
464    }else{
465        $regexp = '@ALL';
466    }
467
468    //check exact match first
469    $matches = preg_grep('/^'.preg_quote($id,'/').'\s+('.$regexp.')\s+/',$AUTH_ACL);
470    if(count($matches)){
471        foreach($matches as $match){
472            $match = preg_replace('/#.*$/','',$match); //ignore comments
473            $acl   = preg_split('/\s+/',$match);
474            if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
475            if($acl[2] > $perm){
476                $perm = $acl[2];
477            }
478        }
479        if($perm > -1){
480            //we had a match - return it
481            return $perm;
482        }
483    }
484
485    //still here? do the namespace checks
486    if($ns){
487        $path = $ns.':\*';
488    }else{
489        $path = '\*'; //root document
490    }
491
492    do{
493        $matches = preg_grep('/^'.$path.'\s+('.$regexp.')\s+/',$AUTH_ACL);
494        if(count($matches)){
495            foreach($matches as $match){
496                $match = preg_replace('/#.*$/','',$match); //ignore comments
497                $acl   = preg_split('/\s+/',$match);
498                if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
499                if($acl[2] > $perm){
500                    $perm = $acl[2];
501                }
502            }
503            //we had a match - return it
504            return $perm;
505        }
506
507        //get next higher namespace
508        $ns   = getNS($ns);
509
510        if($path != '\*'){
511            $path = $ns.':\*';
512            if($path == ':\*') $path = '\*';
513        }else{
514            //we did this already
515            //looks like there is something wrong with the ACL
516            //break here
517            msg('No ACL setup yet! Denying access to everyone.');
518            return AUTH_NONE;
519        }
520    }while(1); //this should never loop endless
521
522    //still here? return no permissions
523    return AUTH_NONE;
524}
525
526/**
527 * Encode ASCII special chars
528 *
529 * Some auth backends allow special chars in their user and groupnames
530 * The special chars are encoded with this function. Only ASCII chars
531 * are encoded UTF-8 multibyte are left as is (different from usual
532 * urlencoding!).
533 *
534 * Decoding can be done with rawurldecode
535 *
536 * @author Andreas Gohr <gohr@cosmocode.de>
537 * @see rawurldecode()
538 */
539function auth_nameencode($name,$skip_group=false){
540    global $cache_authname;
541    $cache =& $cache_authname;
542    $name  = (string) $name;
543
544    if (!isset($cache[$name][$skip_group])) {
545        if($skip_group && $name{0} =='@'){
546            $cache[$name][$skip_group] = '@'.preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
547                    "'%'.dechex(ord(substr('\\1',-1)))",substr($name,1));
548        }else{
549            $cache[$name][$skip_group] = preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
550                    "'%'.dechex(ord(substr('\\1',-1)))",$name);
551        }
552    }
553
554    return $cache[$name][$skip_group];
555}
556
557/**
558 * Create a pronouncable password
559 *
560 * @author  Andreas Gohr <andi@splitbrain.org>
561 * @link    http://www.phpbuilder.com/annotate/message.php3?id=1014451
562 *
563 * @return string  pronouncable password
564 */
565function auth_pwgen(){
566    $pw = '';
567    $c  = 'bcdfghjklmnprstvwz'; //consonants except hard to speak ones
568    $v  = 'aeiou';              //vowels
569    $a  = $c.$v;                //both
570
571    //use two syllables...
572    for($i=0;$i < 2; $i++){
573        $pw .= $c[rand(0, strlen($c)-1)];
574        $pw .= $v[rand(0, strlen($v)-1)];
575        $pw .= $a[rand(0, strlen($a)-1)];
576    }
577    //... and add a nice number
578    $pw .= rand(10,99);
579
580    return $pw;
581}
582
583/**
584 * Sends a password to the given user
585 *
586 * @author  Andreas Gohr <andi@splitbrain.org>
587 *
588 * @return bool  true on success
589 */
590function auth_sendPassword($user,$password){
591    global $conf;
592    global $lang;
593    global $auth;
594
595    $hdrs  = '';
596    $userinfo = $auth->getUserData($user);
597
598    if(!$userinfo['mail']) return false;
599
600    $text = rawLocale('password');
601    $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
602    $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
603    $text = str_replace('@LOGIN@',$user,$text);
604    $text = str_replace('@PASSWORD@',$password,$text);
605    $text = str_replace('@TITLE@',$conf['title'],$text);
606
607    return mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
608            $lang['regpwmail'],
609            $text,
610            $conf['mailfrom']);
611}
612
613/**
614 * Register a new user
615 *
616 * This registers a new user - Data is read directly from $_POST
617 *
618 * @author  Andreas Gohr <andi@splitbrain.org>
619 *
620 * @return bool  true on success, false on any error
621 */
622function register(){
623    global $lang;
624    global $conf;
625    global $auth;
626
627    if(!$_POST['save']) return false;
628    if(!$auth->canDo('addUser')) return false;
629
630    //clean username
631    $_POST['login'] = preg_replace('/.*:/','',$_POST['login']);
632    $_POST['login'] = cleanID($_POST['login']);
633    //clean fullname and email
634    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
635    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
636
637    if( empty($_POST['login']) ||
638        empty($_POST['fullname']) ||
639        empty($_POST['email']) ){
640        msg($lang['regmissing'],-1);
641        return false;
642    }
643
644    if ($conf['autopasswd']) {
645        $pass = auth_pwgen();                // automatically generate password
646    } elseif (empty($_POST['pass']) ||
647            empty($_POST['passchk'])) {
648        msg($lang['regmissing'], -1);        // complain about missing passwords
649        return false;
650    } elseif ($_POST['pass'] != $_POST['passchk']) {
651        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
652        return false;
653    } else {
654        $pass = $_POST['pass'];              // accept checked and valid password
655    }
656
657    //check mail
658    if(!mail_isvalid($_POST['email'])){
659        msg($lang['regbadmail'],-1);
660        return false;
661    }
662
663    //okay try to create the user
664    if(!$auth->triggerUserMod('create', array($_POST['login'],$pass,$_POST['fullname'],$_POST['email']))){
665        msg($lang['reguexists'],-1);
666        return false;
667    }
668
669    // create substitutions for use in notification email
670    $substitutions = array(
671            'NEWUSER' => $_POST['login'],
672            'NEWNAME' => $_POST['fullname'],
673            'NEWEMAIL' => $_POST['email'],
674            );
675
676    if (!$conf['autopasswd']) {
677        msg($lang['regsuccess2'],1);
678        notify('', 'register', '', $_POST['login'], false, $substitutions);
679        return true;
680    }
681
682    // autogenerated password? then send him the password
683    if (auth_sendPassword($_POST['login'],$pass)){
684        msg($lang['regsuccess'],1);
685        notify('', 'register', '', $_POST['login'], false, $substitutions);
686        return true;
687    }else{
688        msg($lang['regmailfail'],-1);
689        return false;
690    }
691}
692
693/**
694 * Update user profile
695 *
696 * @author    Christopher Smith <chris@jalakai.co.uk>
697 */
698function updateprofile() {
699    global $conf;
700    global $INFO;
701    global $lang;
702    global $auth;
703
704    if(empty($_POST['save'])) return false;
705    if(!checkSecurityToken()) return false;
706
707    // should not be able to get here without Profile being possible...
708    if(!$auth->canDo('Profile')) {
709        msg($lang['profna'],-1);
710        return false;
711    }
712
713    if ($_POST['newpass'] != $_POST['passchk']) {
714        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
715        return false;
716    }
717
718    //clean fullname and email
719    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
720    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
721
722    if (empty($_POST['fullname']) || empty($_POST['email'])) {
723        msg($lang['profnoempty'],-1);
724        return false;
725    }
726
727    if (!mail_isvalid($_POST['email'])){
728        msg($lang['regbadmail'],-1);
729        return false;
730    }
731
732    if ($_POST['fullname'] != $INFO['userinfo']['name'] && $auth->canDo('modName')) $changes['name'] = $_POST['fullname'];
733    if ($_POST['email'] != $INFO['userinfo']['mail'] && $auth->canDo('modMail')) $changes['mail'] = $_POST['email'];
734    if (!empty($_POST['newpass']) && $auth->canDo('modPass')) $changes['pass'] = $_POST['newpass'];
735
736    if (!count($changes)) {
737        msg($lang['profnochange'], -1);
738        return false;
739    }
740
741    if ($conf['profileconfirm']) {
742        if (!$auth->checkPass($_SERVER['REMOTE_USER'], $_POST['oldpass'])) {
743            msg($lang['badlogin'],-1);
744            return false;
745        }
746    }
747
748    if ($result = $auth->triggerUserMod('modify', array($_SERVER['REMOTE_USER'], $changes))) {
749        // update cookie and session with the changed data
750        $cookie = base64_decode($_COOKIE[DOKU_COOKIE]);
751        list($user,$sticky,$pass) = explode('|',$cookie,3);
752        if ($changes['pass']) $pass = PMA_blowfish_encrypt($changes['pass'],auth_cookiesalt());
753
754        auth_setCookie($_SERVER['REMOTE_USER'],$pass,(bool)$sticky);
755        return true;
756    }
757}
758
759/**
760 * Send a  new password
761 *
762 * This function handles both phases of the password reset:
763 *
764 *   - handling the first request of password reset
765 *   - validating the password reset auth token
766 *
767 * @author Benoit Chesneau <benoit@bchesneau.info>
768 * @author Chris Smith <chris@jalakai.co.uk>
769 * @author Andreas Gohr <andi@splitbrain.org>
770 *
771 * @return bool true on success, false on any error
772 */
773function act_resendpwd(){
774    global $lang;
775    global $conf;
776    global $auth;
777
778    if(!actionOK('resendpwd')) return false;
779
780    // should not be able to get here without modPass being possible...
781    if(!$auth->canDo('modPass')) {
782        msg($lang['resendna'],-1);
783        return false;
784    }
785
786    $token = preg_replace('/[^a-f0-9]+/','',$_REQUEST['pwauth']);
787
788    if($token){
789        // we're in token phase
790
791        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
792        if(!@file_exists($tfile)){
793            msg($lang['resendpwdbadauth'],-1);
794            return false;
795        }
796        $user = io_readfile($tfile);
797        @unlink($tfile);
798        $userinfo = $auth->getUserData($user);
799        if(!$userinfo['mail']) {
800            msg($lang['resendpwdnouser'], -1);
801            return false;
802        }
803
804        $pass = auth_pwgen();
805        if (!$auth->triggerUserMod('modify', array($user,array('pass' => $pass)))) {
806            msg('error modifying user data',-1);
807            return false;
808        }
809
810        if (auth_sendPassword($user,$pass)) {
811            msg($lang['resendpwdsuccess'],1);
812        } else {
813            msg($lang['regmailfail'],-1);
814        }
815        return true;
816
817    } else {
818        // we're in request phase
819
820        if(!$_POST['save']) return false;
821
822        if (empty($_POST['login'])) {
823            msg($lang['resendpwdmissing'], -1);
824            return false;
825        } else {
826            $_POST['login'] = preg_replace('/.*:/','',$_POST['login']);
827            $user = cleanID($_POST['login']);
828        }
829
830        $userinfo = $auth->getUserData($user);
831        if(!$userinfo['mail']) {
832            msg($lang['resendpwdnouser'], -1);
833            return false;
834        }
835
836        // generate auth token
837        $token = md5(auth_cookiesalt().$user); //secret but user based
838        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
839        $url = wl('',array('do'=>'resendpwd','pwauth'=>$token),true,'&');
840
841        io_saveFile($tfile,$user);
842
843        $text = rawLocale('pwconfirm');
844        $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
845        $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
846        $text = str_replace('@LOGIN@',$user,$text);
847        $text = str_replace('@TITLE@',$conf['title'],$text);
848        $text = str_replace('@CONFIRM@',$url,$text);
849
850        if(mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
851                     $lang['regpwmail'],
852                     $text,
853                     $conf['mailfrom'])){
854            msg($lang['resendpwdconfirm'],1);
855        }else{
856            msg($lang['regmailfail'],-1);
857        }
858        return true;
859    }
860
861    return false; // never reached
862}
863
864/**
865 * Encrypts a password using the given method and salt
866 *
867 * If the selected method needs a salt and none was given, a random one
868 * is chosen.
869 *
870 * The following methods are understood:
871 *
872 *   smd5  - Salted MD5 hashing
873 *   apr1  - Apache salted MD5 hashing
874 *   md5   - Simple MD5 hashing
875 *   sha1  - SHA1 hashing
876 *   ssha  - Salted SHA1 hashing
877 *   crypt - Unix crypt
878 *   mysql - MySQL password (old method)
879 *   my411 - MySQL 4.1.1 password
880 *   kmd5  - Salted MD5 hashing as used by UNB
881 *
882 * @author  Andreas Gohr <andi@splitbrain.org>
883 * @return  string  The crypted password
884 */
885function auth_cryptPassword($clear,$method='',$salt=null){
886    global $conf;
887    if(empty($method)) $method = $conf['passcrypt'];
888
889    //prepare a salt
890    if(is_null($salt)) $salt = md5(uniqid(rand(), true));
891
892    switch(strtolower($method)){
893        case 'smd5':
894            if(defined('CRYPT_MD5') && CRYPT_MD5) return crypt($clear,'$1$'.substr($salt,0,8).'$');
895            // when crypt can't handle SMD5, falls through to pure PHP implementation
896            $magic = '1';
897        case 'apr1':
898            //from http://de.php.net/manual/en/function.crypt.php#73619 comment by <mikey_nich at hotmail dot com>
899            if(!$magic) $magic = 'apr1';
900            $salt = substr($salt,0,8);
901            $len = strlen($clear);
902            $text = $clear.'$'.$magic.'$'.$salt;
903            $bin = pack("H32", md5($clear.$salt.$clear));
904            for($i = $len; $i > 0; $i -= 16) {
905                $text .= substr($bin, 0, min(16, $i));
906            }
907            for($i = $len; $i > 0; $i >>= 1) {
908                $text .= ($i & 1) ? chr(0) : $clear{0};
909            }
910            $bin = pack("H32", md5($text));
911            for($i = 0; $i < 1000; $i++) {
912                $new = ($i & 1) ? $clear : $bin;
913                if ($i % 3) $new .= $salt;
914                if ($i % 7) $new .= $clear;
915                $new .= ($i & 1) ? $bin : $clear;
916                $bin = pack("H32", md5($new));
917            }
918            $tmp = '';
919            for ($i = 0; $i < 5; $i++) {
920                $k = $i + 6;
921                $j = $i + 12;
922                if ($j == 16) $j = 5;
923                $tmp = $bin[$i].$bin[$k].$bin[$j].$tmp;
924            }
925            $tmp = chr(0).chr(0).$bin[11].$tmp;
926            $tmp = strtr(strrev(substr(base64_encode($tmp), 2)),
927                    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
928                    "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
929            return '$'.$magic.'$'.$salt.'$'.$tmp;
930        case 'md5':
931            return md5($clear);
932        case 'sha1':
933            return sha1($clear);
934        case 'ssha':
935            $salt=substr($salt,0,4);
936            return '{SSHA}'.base64_encode(pack("H*", sha1($clear.$salt)).$salt);
937        case 'crypt':
938            return crypt($clear,substr($salt,0,2));
939        case 'mysql':
940            //from http://www.php.net/mysql comment by <soren at byu dot edu>
941            $nr=0x50305735;
942            $nr2=0x12345671;
943            $add=7;
944            $charArr = preg_split("//", $clear);
945            foreach ($charArr as $char) {
946                if (($char == '') || ($char == ' ') || ($char == '\t')) continue;
947                $charVal = ord($char);
948                $nr ^= ((($nr & 63) + $add) * $charVal) + ($nr << 8);
949                $nr2 += ($nr2 << 8) ^ $nr;
950                $add += $charVal;
951            }
952            return sprintf("%08x%08x", ($nr & 0x7fffffff), ($nr2 & 0x7fffffff));
953        case 'my411':
954            return '*'.sha1(pack("H*", sha1($clear)));
955        case 'kmd5':
956            $key = substr($salt, 16, 2);
957            $hash1 = strtolower(md5($key . md5($clear)));
958            $hash2 = substr($hash1, 0, 16) . $key . substr($hash1, 16);
959            return $hash2;
960        default:
961            msg("Unsupported crypt method $method",-1);
962    }
963}
964
965/**
966 * Verifies a cleartext password against a crypted hash
967 *
968 * The method and salt used for the crypted hash is determined automatically
969 * then the clear text password is crypted using the same method. If both hashs
970 * match true is is returned else false
971 *
972 * @author  Andreas Gohr <andi@splitbrain.org>
973 * @return  bool
974 */
975function auth_verifyPassword($clear,$crypt){
976    $method='';
977    $salt='';
978
979    //determine the used method and salt
980    $len = strlen($crypt);
981    if(preg_match('/^\$1\$([^\$]{0,8})\$/',$crypt,$m)){
982        $method = 'smd5';
983        $salt   = $m[1];
984    }elseif(preg_match('/^\$apr1\$([^\$]{0,8})\$/',$crypt,$m)){
985        $method = 'apr1';
986        $salt   = $m[1];
987    }elseif(substr($crypt,0,6) == '{SSHA}'){
988        $method = 'ssha';
989        $salt   = substr(base64_decode(substr($crypt, 6)),20);
990    }elseif($len == 32){
991        $method = 'md5';
992    }elseif($len == 40){
993        $method = 'sha1';
994    }elseif($len == 16){
995        $method = 'mysql';
996    }elseif($len == 41 && $crypt[0] == '*'){
997        $method = 'my411';
998    }elseif($len == 34){
999        $method = 'kmd5';
1000        $salt   = $crypt;
1001    }else{
1002        $method = 'crypt';
1003        $salt   = substr($crypt,0,2);
1004    }
1005
1006    //crypt and compare
1007    if(auth_cryptPassword($clear,$method,$salt) === $crypt){
1008        return true;
1009    }
1010    return false;
1011}
1012
1013/**
1014 * Set the authentication cookie and add user identification data to the session
1015 *
1016 * @param string  $user       username
1017 * @param string  $pass       encrypted password
1018 * @param bool    $sticky     whether or not the cookie will last beyond the session
1019 */
1020function auth_setCookie($user,$pass,$sticky) {
1021    global $conf;
1022    global $auth;
1023    global $USERINFO;
1024
1025    $USERINFO = $auth->getUserData($user);
1026
1027    // set cookie
1028    $cookie = base64_encode($user).'|'.((int) $sticky).'|'.base64_encode($pass);
1029    $time = $sticky ? (time()+60*60*24*365) : 0; //one year
1030    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
1031        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
1032    }else{
1033        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
1034    }
1035    // set session
1036    $_SESSION[DOKU_COOKIE]['auth']['user'] = $user;
1037    $_SESSION[DOKU_COOKIE]['auth']['pass'] = $pass;
1038    $_SESSION[DOKU_COOKIE]['auth']['buid'] = auth_browseruid();
1039    $_SESSION[DOKU_COOKIE]['auth']['info'] = $USERINFO;
1040    $_SESSION[DOKU_COOKIE]['auth']['time'] = time();
1041}
1042
1043/**
1044 * Returns the user, (encrypted) password and sticky bit from cookie
1045 *
1046 * @returns array
1047 */
1048function auth_getCookie(){
1049    if (!isset($_COOKIE[DOKU_COOKIE])) {
1050        return array(null, null, null);
1051    }
1052    list($user,$sticky,$pass) = explode('|',$_COOKIE[DOKU_COOKIE],3);
1053    $sticky = (bool) $sticky;
1054    $pass   = base64_decode($pass);
1055    $user   = base64_decode($user);
1056    return array($user,$sticky,$pass);
1057}
1058
1059//Setup VIM: ex: et ts=2 enc=utf-8 :
1060