xref: /dokuwiki/inc/auth.php (revision 16d24031576f3dd597934facc8b906d512208761) 
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    global $auth;
339
340    if(!$conf['useacl']) return false;
341    if(is_null($user)) {
342        if (!isset($_SERVER['REMOTE_USER'])) {
343            return false;
344        } else {
345            $user = $_SERVER['REMOTE_USER'];
346        }
347    }
348    $user = $auth->cleanUser($user);
349    if(is_null($groups)) $groups = (array) $USERINFO['grps'];
350    $groups = array_map(array($auth,'cleanGroup'),$groups);
351    $user   = auth_nameencode($user);
352
353    // check username against superuser and manager
354    $superusers = explode(',', $conf['superuser']);
355    $superusers = array_unique($superusers);
356    $superusers = array_map('trim', $superusers);
357    // prepare an array containing only true values for array_map call
358    $alltrue = array_fill(0, count($superusers), true);
359    $superusers = array_map('auth_nameencode', $superusers, $alltrue);
360
361    // case insensitive?
362    if(!$auth->isCaseSensitive()){
363        $superusers = array_map('utf8_strtolower',$superusers);
364        $user       = utf8_strtolower($user);
365    }
366
367    // check user match
368    if(in_array($user, $superusers)) return true;
369
370    // check managers
371    if(!$adminonly){
372        $managers = explode(',', $conf['manager']);
373        $managers = array_unique($managers);
374        $managers = array_map('trim', $managers);
375        // prepare an array containing only true values for array_map call
376        $alltrue = array_fill(0, count($managers), true);
377        $managers = array_map('auth_nameencode', $managers, $alltrue);
378        if(!$auth->isCaseSensitive()) $managers = array_map('utf8_strtolower',$managers);
379        if(in_array($user, $managers)) return true;
380    }
381
382    // check user's groups against superuser and manager
383    if (!empty($groups)) {
384
385        //prepend groups with @ and nameencode
386        $cnt = count($groups);
387        for($i=0; $i<$cnt; $i++){
388            $groups[$i] = '@'.auth_nameencode($groups[$i]);
389            if(!$auth->isCaseSensitive()){
390                $groups[$i] = utf8_strtolower($groups[$i]);
391            }
392        }
393
394        // check groups against superuser and manager
395        foreach($superusers as $supu)
396            if(in_array($supu, $groups)) return true;
397        if(!$adminonly){
398            foreach($managers as $mana)
399                if(in_array($mana, $groups)) return true;
400        }
401    }
402
403    return false;
404}
405
406/**
407 * Check if a user is admin
408 *
409 * Alias to auth_ismanager with adminonly=true
410 *
411 * The info is available through $INFO['isadmin'], too
412 *
413 * @author Andreas Gohr <andi@splitbrain.org>
414 * @see auth_ismanager
415 */
416function auth_isadmin($user=null,$groups=null){
417    return auth_ismanager($user,$groups,true);
418}
419
420/**
421 * Convinience function for auth_aclcheck()
422 *
423 * This checks the permissions for the current user
424 *
425 * @author  Andreas Gohr <andi@splitbrain.org>
426 *
427 * @param  string  $id  page ID (needs to be resolved and cleaned)
428 * @return int          permission level
429 */
430function auth_quickaclcheck($id){
431    global $conf;
432    global $USERINFO;
433    # if no ACL is used always return upload rights
434    if(!$conf['useacl']) return AUTH_UPLOAD;
435    return auth_aclcheck($id,$_SERVER['REMOTE_USER'],$USERINFO['grps']);
436}
437
438/**
439 * Returns the maximum rights a user has for
440 * the given ID or its namespace
441 *
442 * @author  Andreas Gohr <andi@splitbrain.org>
443 *
444 * @param  string  $id     page ID (needs to be resolved and cleaned)
445 * @param  string  $user   Username
446 * @param  array   $groups Array of groups the user is in
447 * @return int             permission level
448 */
449function auth_aclcheck($id,$user,$groups){
450    global $conf;
451    global $AUTH_ACL;
452    global $auth;
453
454    // if no ACL is used always return upload rights
455    if(!$conf['useacl']) return AUTH_UPLOAD;
456
457    //make sure groups is an array
458    if(!is_array($groups)) $groups = array();
459
460    //if user is superuser or in superusergroup return 255 (acl_admin)
461    if(auth_isadmin($user,$groups)) { return AUTH_ADMIN; }
462
463    $ci = '';
464    if(!$auth->isCaseSensitive()) $ci = 'ui';
465
466    $user = $auth->cleanUser($user);
467    $groups = array_map(array($auth,'cleanGroup'),(array)$groups);
468    $user = auth_nameencode($user);
469
470    //prepend groups with @ and nameencode
471    $cnt = count($groups);
472    for($i=0; $i<$cnt; $i++){
473        $groups[$i] = '@'.auth_nameencode($groups[$i]);
474    }
475
476    $ns    = getNS($id);
477    $perm  = -1;
478
479    if($user || count($groups)){
480        //add ALL group
481        $groups[] = '@ALL';
482        //add User
483        if($user) $groups[] = $user;
484        //build regexp
485        $regexp   = join('|',$groups);
486    }else{
487        $regexp = '@ALL';
488    }
489
490    //check exact match first
491    $matches = preg_grep('/^'.preg_quote($id,'/').'\s+('.$regexp.')\s+/'.$ci,$AUTH_ACL);
492    if(count($matches)){
493        foreach($matches as $match){
494            $match = preg_replace('/#.*$/','',$match); //ignore comments
495            $acl   = preg_split('/\s+/',$match);
496            if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
497            if($acl[2] > $perm){
498                $perm = $acl[2];
499            }
500        }
501        if($perm > -1){
502            //we had a match - return it
503            return $perm;
504        }
505    }
506
507    //still here? do the namespace checks
508    if($ns){
509        $path = $ns.':\*';
510    }else{
511        $path = '\*'; //root document
512    }
513
514    do{
515        $matches = preg_grep('/^'.$path.'\s+('.$regexp.')\s+/'.$ci,$AUTH_ACL);
516        if(count($matches)){
517            foreach($matches as $match){
518                $match = preg_replace('/#.*$/','',$match); //ignore comments
519                $acl   = preg_split('/\s+/',$match);
520                if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
521                if($acl[2] > $perm){
522                    $perm = $acl[2];
523                }
524            }
525            //we had a match - return it
526            return $perm;
527        }
528
529        //get next higher namespace
530        $ns   = getNS($ns);
531
532        if($path != '\*'){
533            $path = $ns.':\*';
534            if($path == ':\*') $path = '\*';
535        }else{
536            //we did this already
537            //looks like there is something wrong with the ACL
538            //break here
539            msg('No ACL setup yet! Denying access to everyone.');
540            return AUTH_NONE;
541        }
542    }while(1); //this should never loop endless
543
544    //still here? return no permissions
545    return AUTH_NONE;
546}
547
548/**
549 * Encode ASCII special chars
550 *
551 * Some auth backends allow special chars in their user and groupnames
552 * The special chars are encoded with this function. Only ASCII chars
553 * are encoded UTF-8 multibyte are left as is (different from usual
554 * urlencoding!).
555 *
556 * Decoding can be done with rawurldecode
557 *
558 * @author Andreas Gohr <gohr@cosmocode.de>
559 * @see rawurldecode()
560 */
561function auth_nameencode($name,$skip_group=false){
562    global $cache_authname;
563    $cache =& $cache_authname;
564    $name  = (string) $name;
565
566    if (!isset($cache[$name][$skip_group])) {
567        if($skip_group && $name{0} =='@'){
568            $cache[$name][$skip_group] = '@'.preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
569                    "'%'.dechex(ord(substr('\\1',-1)))",substr($name,1));
570        }else{
571            $cache[$name][$skip_group] = preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
572                    "'%'.dechex(ord(substr('\\1',-1)))",$name);
573        }
574    }
575
576    return $cache[$name][$skip_group];
577}
578
579/**
580 * Create a pronouncable password
581 *
582 * @author  Andreas Gohr <andi@splitbrain.org>
583 * @link    http://www.phpbuilder.com/annotate/message.php3?id=1014451
584 *
585 * @return string  pronouncable password
586 */
587function auth_pwgen(){
588    $pw = '';
589    $c  = 'bcdfghjklmnprstvwz'; //consonants except hard to speak ones
590    $v  = 'aeiou';              //vowels
591    $a  = $c.$v;                //both
592
593    //use two syllables...
594    for($i=0;$i < 2; $i++){
595        $pw .= $c[rand(0, strlen($c)-1)];
596        $pw .= $v[rand(0, strlen($v)-1)];
597        $pw .= $a[rand(0, strlen($a)-1)];
598    }
599    //... and add a nice number
600    $pw .= rand(10,99);
601
602    return $pw;
603}
604
605/**
606 * Sends a password to the given user
607 *
608 * @author  Andreas Gohr <andi@splitbrain.org>
609 *
610 * @return bool  true on success
611 */
612function auth_sendPassword($user,$password){
613    global $conf;
614    global $lang;
615    global $auth;
616
617    $hdrs  = '';
618    $user     = $auth->cleanUser($user);
619    $userinfo = $auth->getUserData($user);
620
621    if(!$userinfo['mail']) return false;
622
623    $text = rawLocale('password');
624    $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
625    $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
626    $text = str_replace('@LOGIN@',$user,$text);
627    $text = str_replace('@PASSWORD@',$password,$text);
628    $text = str_replace('@TITLE@',$conf['title'],$text);
629
630    return mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
631            $lang['regpwmail'],
632            $text,
633            $conf['mailfrom']);
634}
635
636/**
637 * Register a new user
638 *
639 * This registers a new user - Data is read directly from $_POST
640 *
641 * @author  Andreas Gohr <andi@splitbrain.org>
642 *
643 * @return bool  true on success, false on any error
644 */
645function register(){
646    global $lang;
647    global $conf;
648    global $auth;
649
650    if(!$_POST['save']) return false;
651    if(!$auth->canDo('addUser')) return false;
652
653    //clean username
654    $_POST['login'] = trim($auth->cleanUser($_POST['login']));
655
656    //clean fullname and email
657    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
658    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
659
660    if( empty($_POST['login']) ||
661        empty($_POST['fullname']) ||
662        empty($_POST['email']) ){
663        msg($lang['regmissing'],-1);
664        return false;
665    }
666
667    if ($conf['autopasswd']) {
668        $pass = auth_pwgen();                // automatically generate password
669    } elseif (empty($_POST['pass']) ||
670            empty($_POST['passchk'])) {
671        msg($lang['regmissing'], -1);        // complain about missing passwords
672        return false;
673    } elseif ($_POST['pass'] != $_POST['passchk']) {
674        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
675        return false;
676    } else {
677        $pass = $_POST['pass'];              // accept checked and valid password
678    }
679
680    //check mail
681    if(!mail_isvalid($_POST['email'])){
682        msg($lang['regbadmail'],-1);
683        return false;
684    }
685
686    //okay try to create the user
687    if(!$auth->triggerUserMod('create', array($_POST['login'],$pass,$_POST['fullname'],$_POST['email']))){
688        msg($lang['reguexists'],-1);
689        return false;
690    }
691
692    // create substitutions for use in notification email
693    $substitutions = array(
694            'NEWUSER' => $_POST['login'],
695            'NEWNAME' => $_POST['fullname'],
696            'NEWEMAIL' => $_POST['email'],
697            );
698
699    if (!$conf['autopasswd']) {
700        msg($lang['regsuccess2'],1);
701        notify('', 'register', '', $_POST['login'], false, $substitutions);
702        return true;
703    }
704
705    // autogenerated password? then send him the password
706    if (auth_sendPassword($_POST['login'],$pass)){
707        msg($lang['regsuccess'],1);
708        notify('', 'register', '', $_POST['login'], false, $substitutions);
709        return true;
710    }else{
711        msg($lang['regmailfail'],-1);
712        return false;
713    }
714}
715
716/**
717 * Update user profile
718 *
719 * @author    Christopher Smith <chris@jalakai.co.uk>
720 */
721function updateprofile() {
722    global $conf;
723    global $INFO;
724    global $lang;
725    global $auth;
726
727    if(empty($_POST['save'])) return false;
728    if(!checkSecurityToken()) return false;
729
730    // should not be able to get here without Profile being possible...
731    if(!$auth->canDo('Profile')) {
732        msg($lang['profna'],-1);
733        return false;
734    }
735
736    if ($_POST['newpass'] != $_POST['passchk']) {
737        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
738        return false;
739    }
740
741    //clean fullname and email
742    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
743    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
744
745    if (empty($_POST['fullname']) || empty($_POST['email'])) {
746        msg($lang['profnoempty'],-1);
747        return false;
748    }
749
750    if (!mail_isvalid($_POST['email'])){
751        msg($lang['regbadmail'],-1);
752        return false;
753    }
754
755    if ($_POST['fullname'] != $INFO['userinfo']['name'] && $auth->canDo('modName')) $changes['name'] = $_POST['fullname'];
756    if ($_POST['email'] != $INFO['userinfo']['mail'] && $auth->canDo('modMail')) $changes['mail'] = $_POST['email'];
757    if (!empty($_POST['newpass']) && $auth->canDo('modPass')) $changes['pass'] = $_POST['newpass'];
758
759    if (!count($changes)) {
760        msg($lang['profnochange'], -1);
761        return false;
762    }
763
764    if ($conf['profileconfirm']) {
765        if (!$auth->checkPass($_SERVER['REMOTE_USER'], $_POST['oldpass'])) {
766            msg($lang['badlogin'],-1);
767            return false;
768        }
769    }
770
771    if ($result = $auth->triggerUserMod('modify', array($_SERVER['REMOTE_USER'], $changes))) {
772        // update cookie and session with the changed data
773        $cookie = base64_decode($_COOKIE[DOKU_COOKIE]);
774        list($user,$sticky,$pass) = explode('|',$cookie,3);
775        if ($changes['pass']) $pass = PMA_blowfish_encrypt($changes['pass'],auth_cookiesalt());
776
777        auth_setCookie($_SERVER['REMOTE_USER'],$pass,(bool)$sticky);
778        return true;
779    }
780}
781
782/**
783 * Send a  new password
784 *
785 * This function handles both phases of the password reset:
786 *
787 *   - handling the first request of password reset
788 *   - validating the password reset auth token
789 *
790 * @author Benoit Chesneau <benoit@bchesneau.info>
791 * @author Chris Smith <chris@jalakai.co.uk>
792 * @author Andreas Gohr <andi@splitbrain.org>
793 *
794 * @return bool true on success, false on any error
795 */
796function act_resendpwd(){
797    global $lang;
798    global $conf;
799    global $auth;
800
801    if(!actionOK('resendpwd')) return false;
802
803    // should not be able to get here without modPass being possible...
804    if(!$auth->canDo('modPass')) {
805        msg($lang['resendna'],-1);
806        return false;
807    }
808
809    $token = preg_replace('/[^a-f0-9]+/','',$_REQUEST['pwauth']);
810
811    if($token){
812        // we're in token phase
813
814        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
815        if(!@file_exists($tfile)){
816            msg($lang['resendpwdbadauth'],-1);
817            return false;
818        }
819        $user = io_readfile($tfile);
820        @unlink($tfile);
821        $userinfo = $auth->getUserData($user);
822        if(!$userinfo['mail']) {
823            msg($lang['resendpwdnouser'], -1);
824            return false;
825        }
826
827        $pass = auth_pwgen();
828        if (!$auth->triggerUserMod('modify', array($user,array('pass' => $pass)))) {
829            msg('error modifying user data',-1);
830            return false;
831        }
832
833        if (auth_sendPassword($user,$pass)) {
834            msg($lang['resendpwdsuccess'],1);
835        } else {
836            msg($lang['regmailfail'],-1);
837        }
838        return true;
839
840    } else {
841        // we're in request phase
842
843        if(!$_POST['save']) return false;
844
845        if (empty($_POST['login'])) {
846            msg($lang['resendpwdmissing'], -1);
847            return false;
848        } else {
849            $user = trim($auth->cleanUser($_POST['login']));
850        }
851
852        $userinfo = $auth->getUserData($user);
853        if(!$userinfo['mail']) {
854            msg($lang['resendpwdnouser'], -1);
855            return false;
856        }
857
858        // generate auth token
859        $token = md5(auth_cookiesalt().$user); //secret but user based
860        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
861        $url = wl('',array('do'=>'resendpwd','pwauth'=>$token),true,'&');
862
863        io_saveFile($tfile,$user);
864
865        $text = rawLocale('pwconfirm');
866        $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
867        $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
868        $text = str_replace('@LOGIN@',$user,$text);
869        $text = str_replace('@TITLE@',$conf['title'],$text);
870        $text = str_replace('@CONFIRM@',$url,$text);
871
872        if(mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
873                     $lang['regpwmail'],
874                     $text,
875                     $conf['mailfrom'])){
876            msg($lang['resendpwdconfirm'],1);
877        }else{
878            msg($lang['regmailfail'],-1);
879        }
880        return true;
881    }
882
883    return false; // never reached
884}
885
886/**
887 * Encrypts a password using the given method and salt
888 *
889 * If the selected method needs a salt and none was given, a random one
890 * is chosen.
891 *
892 * The following methods are understood:
893 *
894 *   smd5  - Salted MD5 hashing
895 *   apr1  - Apache salted MD5 hashing
896 *   md5   - Simple MD5 hashing
897 *   sha1  - SHA1 hashing
898 *   ssha  - Salted SHA1 hashing
899 *   crypt - Unix crypt
900 *   mysql - MySQL password (old method)
901 *   my411 - MySQL 4.1.1 password
902 *   kmd5  - Salted MD5 hashing as used by UNB
903 *
904 * @author  Andreas Gohr <andi@splitbrain.org>
905 * @return  string  The crypted password
906 */
907function auth_cryptPassword($clear,$method='',$salt=null){
908    global $conf;
909    if(empty($method)) $method = $conf['passcrypt'];
910
911    //prepare a salt
912    if(is_null($salt)) $salt = md5(uniqid(rand(), true));
913
914    switch(strtolower($method)){
915        case 'smd5':
916            if(defined('CRYPT_MD5') && CRYPT_MD5) return crypt($clear,'$1$'.substr($salt,0,8).'$');
917            // when crypt can't handle SMD5, falls through to pure PHP implementation
918            $magic = '1';
919        case 'apr1':
920            //from http://de.php.net/manual/en/function.crypt.php#73619 comment by <mikey_nich at hotmail dot com>
921            if(!$magic) $magic = 'apr1';
922            $salt = substr($salt,0,8);
923            $len = strlen($clear);
924            $text = $clear.'$'.$magic.'$'.$salt;
925            $bin = pack("H32", md5($clear.$salt.$clear));
926            for($i = $len; $i > 0; $i -= 16) {
927                $text .= substr($bin, 0, min(16, $i));
928            }
929            for($i = $len; $i > 0; $i >>= 1) {
930                $text .= ($i & 1) ? chr(0) : $clear{0};
931            }
932            $bin = pack("H32", md5($text));
933            for($i = 0; $i < 1000; $i++) {
934                $new = ($i & 1) ? $clear : $bin;
935                if ($i % 3) $new .= $salt;
936                if ($i % 7) $new .= $clear;
937                $new .= ($i & 1) ? $bin : $clear;
938                $bin = pack("H32", md5($new));
939            }
940            $tmp = '';
941            for ($i = 0; $i < 5; $i++) {
942                $k = $i + 6;
943                $j = $i + 12;
944                if ($j == 16) $j = 5;
945                $tmp = $bin[$i].$bin[$k].$bin[$j].$tmp;
946            }
947            $tmp = chr(0).chr(0).$bin[11].$tmp;
948            $tmp = strtr(strrev(substr(base64_encode($tmp), 2)),
949                    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
950                    "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
951            return '$'.$magic.'$'.$salt.'$'.$tmp;
952        case 'md5':
953            return md5($clear);
954        case 'sha1':
955            return sha1($clear);
956        case 'ssha':
957            $salt=substr($salt,0,4);
958            return '{SSHA}'.base64_encode(pack("H*", sha1($clear.$salt)).$salt);
959        case 'crypt':
960            return crypt($clear,substr($salt,0,2));
961        case 'mysql':
962            //from http://www.php.net/mysql comment by <soren at byu dot edu>
963            $nr=0x50305735;
964            $nr2=0x12345671;
965            $add=7;
966            $charArr = preg_split("//", $clear);
967            foreach ($charArr as $char) {
968                if (($char == '') || ($char == ' ') || ($char == '\t')) continue;
969                $charVal = ord($char);
970                $nr ^= ((($nr & 63) + $add) * $charVal) + ($nr << 8);
971                $nr2 += ($nr2 << 8) ^ $nr;
972                $add += $charVal;
973            }
974            return sprintf("%08x%08x", ($nr & 0x7fffffff), ($nr2 & 0x7fffffff));
975        case 'my411':
976            return '*'.sha1(pack("H*", sha1($clear)));
977        case 'kmd5':
978            $key = substr($salt, 16, 2);
979            $hash1 = strtolower(md5($key . md5($clear)));
980            $hash2 = substr($hash1, 0, 16) . $key . substr($hash1, 16);
981            return $hash2;
982        default:
983            msg("Unsupported crypt method $method",-1);
984    }
985}
986
987/**
988 * Verifies a cleartext password against a crypted hash
989 *
990 * The method and salt used for the crypted hash is determined automatically
991 * then the clear text password is crypted using the same method. If both hashs
992 * match true is is returned else false
993 *
994 * @author  Andreas Gohr <andi@splitbrain.org>
995 * @return  bool
996 */
997function auth_verifyPassword($clear,$crypt){
998    $method='';
999    $salt='';
1000
1001    //determine the used method and salt
1002    $len = strlen($crypt);
1003    if(preg_match('/^\$1\$([^\$]{0,8})\$/',$crypt,$m)){
1004        $method = 'smd5';
1005        $salt   = $m[1];
1006    }elseif(preg_match('/^\$apr1\$([^\$]{0,8})\$/',$crypt,$m)){
1007        $method = 'apr1';
1008        $salt   = $m[1];
1009    }elseif(substr($crypt,0,6) == '{SSHA}'){
1010        $method = 'ssha';
1011        $salt   = substr(base64_decode(substr($crypt, 6)),20);
1012    }elseif($len == 32){
1013        $method = 'md5';
1014    }elseif($len == 40){
1015        $method = 'sha1';
1016    }elseif($len == 16){
1017        $method = 'mysql';
1018    }elseif($len == 41 && $crypt[0] == '*'){
1019        $method = 'my411';
1020    }elseif($len == 34){
1021        $method = 'kmd5';
1022        $salt   = $crypt;
1023    }else{
1024        $method = 'crypt';
1025        $salt   = substr($crypt,0,2);
1026    }
1027
1028    //crypt and compare
1029    if(auth_cryptPassword($clear,$method,$salt) === $crypt){
1030        return true;
1031    }
1032    return false;
1033}
1034
1035/**
1036 * Set the authentication cookie and add user identification data to the session
1037 *
1038 * @param string  $user       username
1039 * @param string  $pass       encrypted password
1040 * @param bool    $sticky     whether or not the cookie will last beyond the session
1041 */
1042function auth_setCookie($user,$pass,$sticky) {
1043    global $conf;
1044    global $auth;
1045    global $USERINFO;
1046
1047    $USERINFO = $auth->getUserData($user);
1048
1049    // set cookie
1050    $cookie = base64_encode($user).'|'.((int) $sticky).'|'.base64_encode($pass);
1051    $time = $sticky ? (time()+60*60*24*365) : 0; //one year
1052    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
1053        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
1054    }else{
1055        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
1056    }
1057    // set session
1058    $_SESSION[DOKU_COOKIE]['auth']['user'] = $user;
1059    $_SESSION[DOKU_COOKIE]['auth']['pass'] = $pass;
1060    $_SESSION[DOKU_COOKIE]['auth']['buid'] = auth_browseruid();
1061    $_SESSION[DOKU_COOKIE]['auth']['info'] = $USERINFO;
1062    $_SESSION[DOKU_COOKIE]['auth']['time'] = time();
1063}
1064
1065/**
1066 * Returns the user, (encrypted) password and sticky bit from cookie
1067 *
1068 * @returns array
1069 */
1070function auth_getCookie(){
1071    if (!isset($_COOKIE[DOKU_COOKIE])) {
1072        return array(null, null, null);
1073    }
1074    list($user,$sticky,$pass) = explode('|',$_COOKIE[DOKU_COOKIE],3);
1075    $sticky = (bool) $sticky;
1076    $pass   = base64_decode($pass);
1077    $user   = base64_decode($user);
1078    return array($user,$sticky,$pass);
1079}
1080
1081//Setup VIM: ex: et ts=2 enc=utf-8 :
1082