xref: /dokuwiki/inc/auth.php (revision 1f4a73412e359187bcd0ad71ffe2e6298738ab10) 
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            $_REQUEST['http_credentials'] = true;
75        }
76
77        if(isset($_REQUEST['authtok'])){
78            // when an authentication token is given, trust the session
79            auth_validateToken($_REQUEST['authtok']);
80        }elseif(!is_null($auth) && $auth->canDo('external')){
81            // external trust mechanism in place
82            $auth->trustExternal($_REQUEST['u'],$_REQUEST['p'],$_REQUEST['r']);
83        }else{
84            $evdata = array(
85                    'user'     => $_REQUEST['u'],
86                    'password' => $_REQUEST['p'],
87                    'sticky'   => $_REQUEST['r'],
88                    'silent'   => $_REQUEST['http_credentials'],
89                    );
90            $evt = new Doku_Event('AUTH_LOGIN_CHECK',$evdata);
91            if($evt->advise_before()){
92                auth_login($evdata['user'],
93                        $evdata['password'],
94                        $evdata['sticky'],
95                        $evdata['silent']);
96            }
97            $evt->advise_after();
98            unset($evt);
99            unset($evdata);
100        }
101    }
102
103    //load ACL into a global array
104    global $AUTH_ACL;
105    if(is_readable(DOKU_CONF.'acl.auth.php')){
106        $AUTH_ACL = file(DOKU_CONF.'acl.auth.php');
107        if(isset($_SERVER['REMOTE_USER'])){
108            $AUTH_ACL = str_replace('%USER%',$_SERVER['REMOTE_USER'],$AUTH_ACL);
109            $AUTH_ACL = str_replace('@USER@',$_SERVER['REMOTE_USER'],$AUTH_ACL); //legacy
110        }
111    }else{
112        $AUTH_ACL = array();
113    }
114}
115
116/**
117 * This tries to login the user based on the sent auth credentials
118 *
119 * The authentication works like this: if a username was given
120 * a new login is assumed and user/password are checked. If they
121 * are correct the password is encrypted with blowfish and stored
122 * together with the username in a cookie - the same info is stored
123 * in the session, too. Additonally a browserID is stored in the
124 * session.
125 *
126 * If no username was given the cookie is checked: if the username,
127 * crypted password and browserID match between session and cookie
128 * no further testing is done and the user is accepted
129 *
130 * If a cookie was found but no session info was availabe the
131 * blowfish encrypted password from the cookie is decrypted and
132 * together with username rechecked by calling this function again.
133 *
134 * On a successful login $_SERVER[REMOTE_USER] and $USERINFO
135 * are set.
136 *
137 * @author  Andreas Gohr <andi@splitbrain.org>
138 *
139 * @param   string  $user    Username
140 * @param   string  $pass    Cleartext Password
141 * @param   bool    $sticky  Cookie should not expire
142 * @param   bool    $silent  Don't show error on bad auth
143 * @return  bool             true on successful auth
144 */
145function auth_login($user,$pass,$sticky=false,$silent=false){
146    global $USERINFO;
147    global $conf;
148    global $lang;
149    global $auth;
150    $sticky ? $sticky = true : $sticky = false; //sanity check
151
152    if(!empty($user)){
153        //usual login
154        if ($auth->checkPass($user,$pass)){
155            // make logininfo globally available
156            $_SERVER['REMOTE_USER'] = $user;
157            auth_setCookie($user,PMA_blowfish_encrypt($pass,auth_cookiesalt()),$sticky);
158            return true;
159        }else{
160            //invalid credentials - log off
161            if(!$silent) msg($lang['badlogin'],-1);
162            auth_logoff();
163            return false;
164        }
165    }else{
166        // read cookie information
167        list($user,$sticky,$pass) = auth_getCookie();
168        // get session info
169        $session = $_SESSION[DOKU_COOKIE]['auth'];
170        if($user && $pass){
171            // we got a cookie - see if we can trust it
172            if(isset($session) &&
173                    $auth->useSessionCache($user) &&
174                    ($session['time'] >= time()-$conf['auth_security_timeout']) &&
175                    ($session['user'] == $user) &&
176                    ($session['pass'] == $pass) &&  //still crypted
177                    ($session['buid'] == auth_browseruid()) ){
178                // he has session, cookie and browser right - let him in
179                $_SERVER['REMOTE_USER'] = $user;
180                $USERINFO = $session['info']; //FIXME move all references to session
181                return true;
182            }
183            // no we don't trust it yet - recheck pass but silent
184            $pass = PMA_blowfish_decrypt($pass,auth_cookiesalt());
185            return auth_login($user,$pass,$sticky,true);
186        }
187    }
188    //just to be sure
189    auth_logoff(true);
190    return false;
191}
192
193/**
194 * Checks if a given authentication token was stored in the session
195 *
196 * Will setup authentication data using data from the session if the
197 * token is correct. Will exit with a 401 Status if not.
198 *
199 * @author Andreas Gohr <andi@splitbrain.org>
200 * @param  string $token The authentication token
201 * @return boolean true (or will exit on failure)
202 */
203function auth_validateToken($token){
204    if(!$token || $token != $_SESSION[DOKU_COOKIE]['auth']['token']){
205        // bad token
206        header("HTTP/1.0 401 Unauthorized");
207        print 'Invalid auth token - maybe the session timed out';
208        unset($_SESSION[DOKU_COOKIE]['auth']['token']); // no second chance
209        exit;
210    }
211    // still here? trust the session data
212    global $USERINFO;
213    $_SERVER['REMOTE_USER'] = $_SESSION[DOKU_COOKIE]['auth']['user'];
214    $USERINFO = $_SESSION[DOKU_COOKIE]['auth']['info'];
215    return true;
216}
217
218/**
219 * Create an auth token and store it in the session
220 *
221 * NOTE: this is completely unrelated to the getSecurityToken() function
222 *
223 * @author Andreas Gohr <andi@splitbrain.org>
224 * @return string The auth token
225 */
226function auth_createToken(){
227    $token = md5(mt_rand());
228    @session_start(); // reopen the session if needed
229    $_SESSION[DOKU_COOKIE]['auth']['token'] = $token;
230    session_write_close();
231    return $token;
232}
233
234/**
235 * Builds a pseudo UID from browser and IP data
236 *
237 * This is neither unique nor unfakable - still it adds some
238 * security. Using the first part of the IP makes sure
239 * proxy farms like AOLs are stil okay.
240 *
241 * @author  Andreas Gohr <andi@splitbrain.org>
242 *
243 * @return  string  a MD5 sum of various browser headers
244 */
245function auth_browseruid(){
246    $ip   = clientIP(true);
247    $uid  = '';
248    $uid .= $_SERVER['HTTP_USER_AGENT'];
249    $uid .= $_SERVER['HTTP_ACCEPT_ENCODING'];
250    $uid .= $_SERVER['HTTP_ACCEPT_LANGUAGE'];
251    $uid .= $_SERVER['HTTP_ACCEPT_CHARSET'];
252    $uid .= substr($ip,0,strpos($ip,'.'));
253    return md5($uid);
254}
255
256/**
257 * Creates a random key to encrypt the password in cookies
258 *
259 * This function tries to read the password for encrypting
260 * cookies from $conf['metadir'].'/_htcookiesalt'
261 * if no such file is found a random key is created and
262 * and stored in this file.
263 *
264 * @author  Andreas Gohr <andi@splitbrain.org>
265 *
266 * @return  string
267 */
268function auth_cookiesalt(){
269    global $conf;
270    $file = $conf['metadir'].'/_htcookiesalt';
271    $salt = io_readFile($file);
272    if(empty($salt)){
273        $salt = uniqid(rand(),true);
274        io_saveFile($file,$salt);
275    }
276    return $salt;
277}
278
279/**
280 * Log out the current user
281 *
282 * This clears all authentication data and thus log the user
283 * off. It also clears session data.
284 *
285 * @author  Andreas Gohr <andi@splitbrain.org>
286 * @param bool $keepbc - when true, the breadcrumb data is not cleared
287 */
288function auth_logoff($keepbc=false){
289    global $conf;
290    global $USERINFO;
291    global $INFO, $ID;
292    global $auth;
293
294    // make sure the session is writable (it usually is)
295    @session_start();
296
297    if(isset($_SESSION[DOKU_COOKIE]['auth']['user']))
298        unset($_SESSION[DOKU_COOKIE]['auth']['user']);
299    if(isset($_SESSION[DOKU_COOKIE]['auth']['pass']))
300        unset($_SESSION[DOKU_COOKIE]['auth']['pass']);
301    if(isset($_SESSION[DOKU_COOKIE]['auth']['info']))
302        unset($_SESSION[DOKU_COOKIE]['auth']['info']);
303    if(!$keepbc && isset($_SESSION[DOKU_COOKIE]['bc']))
304        unset($_SESSION[DOKU_COOKIE]['bc']);
305    if(isset($_SERVER['REMOTE_USER']))
306        unset($_SERVER['REMOTE_USER']);
307    $USERINFO=null; //FIXME
308
309    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
310        setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
311    }else{
312        setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
313    }
314
315    if($auth && $auth->canDo('logoff')){
316        $auth->logOff();
317    }
318}
319
320/**
321 * Check if a user is a manager
322 *
323 * Should usually be called without any parameters to check the current
324 * user.
325 *
326 * The info is available through $INFO['ismanager'], too
327 *
328 * @author Andreas Gohr <andi@splitbrain.org>
329 * @see    auth_isadmin
330 * @param  string user      - Username
331 * @param  array  groups    - List of groups the user is in
332 * @param  bool   adminonly - when true checks if user is admin
333 */
334function auth_ismanager($user=null,$groups=null,$adminonly=false){
335    global $conf;
336    global $USERINFO;
337
338    if(!$conf['useacl']) return false;
339    if(is_null($user)) {
340        if (!isset($_SERVER['REMOTE_USER'])) {
341            return false;
342        } else {
343            $user = $_SERVER['REMOTE_USER'];
344        }
345    }
346    if(is_null($groups)) $groups = (array) $USERINFO['grps'];
347    $user   = auth_nameencode($user);
348
349    // check username against superuser and manager
350    $superusers = explode(',', $conf['superuser']);
351    $superusers = array_unique($superusers);
352    $superusers = array_map('trim', $superusers);
353    // prepare an array containing only true values for array_map call
354    $alltrue = array_fill(0, count($superusers), true);
355    $superusers = array_map('auth_nameencode', $superusers, $alltrue);
356    if(in_array($user, $superusers)) return true;
357
358    if(!$adminonly){
359        $managers = explode(',', $conf['manager']);
360        $managers = array_unique($managers);
361        $managers = array_map('trim', $managers);
362        // prepare an array containing only true values for array_map call
363        $alltrue = array_fill(0, count($managers), true);
364        $managers = array_map('auth_nameencode', $managers, $alltrue);
365        if(in_array($user, $managers)) return true;
366    }
367
368    // check user's groups against superuser and manager
369    if (!empty($groups)) {
370
371        //prepend groups with @ and nameencode
372        $cnt = count($groups);
373        for($i=0; $i<$cnt; $i++){
374            $groups[$i] = '@'.auth_nameencode($groups[$i]);
375        }
376
377        // check groups against superuser and manager
378        foreach($superusers as $supu)
379            if(in_array($supu, $groups)) return true;
380        if(!$adminonly){
381            foreach($managers as $mana)
382                if(in_array($mana, $groups)) return true;
383        }
384    }
385
386    return false;
387}
388
389/**
390 * Check if a user is admin
391 *
392 * Alias to auth_ismanager with adminonly=true
393 *
394 * The info is available through $INFO['isadmin'], too
395 *
396 * @author Andreas Gohr <andi@splitbrain.org>
397 * @see auth_ismanager
398 */
399function auth_isadmin($user=null,$groups=null){
400    return auth_ismanager($user,$groups,true);
401}
402
403/**
404 * Convinience function for auth_aclcheck()
405 *
406 * This checks the permissions for the current user
407 *
408 * @author  Andreas Gohr <andi@splitbrain.org>
409 *
410 * @param  string  $id  page ID (needs to be resolved and cleaned)
411 * @return int          permission level
412 */
413function auth_quickaclcheck($id){
414    global $conf;
415    global $USERINFO;
416    # if no ACL is used always return upload rights
417    if(!$conf['useacl']) return AUTH_UPLOAD;
418    return auth_aclcheck($id,$_SERVER['REMOTE_USER'],$USERINFO['grps']);
419}
420
421/**
422 * Returns the maximum rights a user has for
423 * the given ID or its namespace
424 *
425 * @author  Andreas Gohr <andi@splitbrain.org>
426 *
427 * @param  string  $id     page ID (needs to be resolved and cleaned)
428 * @param  string  $user   Username
429 * @param  array   $groups Array of groups the user is in
430 * @return int             permission level
431 */
432function auth_aclcheck($id,$user,$groups){
433    global $conf;
434    global $AUTH_ACL;
435
436    // if no ACL is used always return upload rights
437    if(!$conf['useacl']) return AUTH_UPLOAD;
438
439    //make sure groups is an array
440    if(!is_array($groups)) $groups = array();
441
442    //if user is superuser or in superusergroup return 255 (acl_admin)
443    if(auth_isadmin($user,$groups)) { return AUTH_ADMIN; }
444
445    $user = auth_nameencode($user);
446
447    //prepend groups with @ and nameencode
448    $cnt = count($groups);
449    for($i=0; $i<$cnt; $i++){
450        $groups[$i] = '@'.auth_nameencode($groups[$i]);
451    }
452
453    $ns    = getNS($id);
454    $perm  = -1;
455
456    if($user || count($groups)){
457        //add ALL group
458        $groups[] = '@ALL';
459        //add User
460        if($user) $groups[] = $user;
461        //build regexp
462        $regexp   = join('|',$groups);
463    }else{
464        $regexp = '@ALL';
465    }
466
467    //check exact match first
468    $matches = preg_grep('/^'.preg_quote($id,'/').'\s+('.$regexp.')\s+/',$AUTH_ACL);
469    if(count($matches)){
470        foreach($matches as $match){
471            $match = preg_replace('/#.*$/','',$match); //ignore comments
472            $acl   = preg_split('/\s+/',$match);
473            if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
474            if($acl[2] > $perm){
475                $perm = $acl[2];
476            }
477        }
478        if($perm > -1){
479            //we had a match - return it
480            return $perm;
481        }
482    }
483
484    //still here? do the namespace checks
485    if($ns){
486        $path = $ns.':\*';
487    }else{
488        $path = '\*'; //root document
489    }
490
491    do{
492        $matches = preg_grep('/^'.$path.'\s+('.$regexp.')\s+/',$AUTH_ACL);
493        if(count($matches)){
494            foreach($matches as $match){
495                $match = preg_replace('/#.*$/','',$match); //ignore comments
496                $acl   = preg_split('/\s+/',$match);
497                if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
498                if($acl[2] > $perm){
499                    $perm = $acl[2];
500                }
501            }
502            //we had a match - return it
503            return $perm;
504        }
505
506        //get next higher namespace
507        $ns   = getNS($ns);
508
509        if($path != '\*'){
510            $path = $ns.':\*';
511            if($path == ':\*') $path = '\*';
512        }else{
513            //we did this already
514            //looks like there is something wrong with the ACL
515            //break here
516            msg('No ACL setup yet! Denying access to everyone.');
517            return AUTH_NONE;
518        }
519    }while(1); //this should never loop endless
520
521    //still here? return no permissions
522    return AUTH_NONE;
523}
524
525/**
526 * Encode ASCII special chars
527 *
528 * Some auth backends allow special chars in their user and groupnames
529 * The special chars are encoded with this function. Only ASCII chars
530 * are encoded UTF-8 multibyte are left as is (different from usual
531 * urlencoding!).
532 *
533 * Decoding can be done with rawurldecode
534 *
535 * @author Andreas Gohr <gohr@cosmocode.de>
536 * @see rawurldecode()
537 */
538function auth_nameencode($name,$skip_group=false){
539    global $cache_authname;
540    $cache =& $cache_authname;
541    $name  = (string) $name;
542
543    if (!isset($cache[$name][$skip_group])) {
544        if($skip_group && $name{0} =='@'){
545            $cache[$name][$skip_group] = '@'.preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
546                    "'%'.dechex(ord(substr('\\1',-1)))",substr($name,1));
547        }else{
548            $cache[$name][$skip_group] = preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
549                    "'%'.dechex(ord(substr('\\1',-1)))",$name);
550        }
551    }
552
553    return $cache[$name][$skip_group];
554}
555
556/**
557 * Create a pronouncable password
558 *
559 * @author  Andreas Gohr <andi@splitbrain.org>
560 * @link    http://www.phpbuilder.com/annotate/message.php3?id=1014451
561 *
562 * @return string  pronouncable password
563 */
564function auth_pwgen(){
565    $pw = '';
566    $c  = 'bcdfghjklmnprstvwz'; //consonants except hard to speak ones
567    $v  = 'aeiou';              //vowels
568    $a  = $c.$v;                //both
569
570    //use two syllables...
571    for($i=0;$i < 2; $i++){
572        $pw .= $c[rand(0, strlen($c)-1)];
573        $pw .= $v[rand(0, strlen($v)-1)];
574        $pw .= $a[rand(0, strlen($a)-1)];
575    }
576    //... and add a nice number
577    $pw .= rand(10,99);
578
579    return $pw;
580}
581
582/**
583 * Sends a password to the given user
584 *
585 * @author  Andreas Gohr <andi@splitbrain.org>
586 *
587 * @return bool  true on success
588 */
589function auth_sendPassword($user,$password){
590    global $conf;
591    global $lang;
592    global $auth;
593
594    $hdrs  = '';
595    $userinfo = $auth->getUserData($user);
596
597    if(!$userinfo['mail']) return false;
598
599    $text = rawLocale('password');
600    $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
601    $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
602    $text = str_replace('@LOGIN@',$user,$text);
603    $text = str_replace('@PASSWORD@',$password,$text);
604    $text = str_replace('@TITLE@',$conf['title'],$text);
605
606    return mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
607            $lang['regpwmail'],
608            $text,
609            $conf['mailfrom']);
610}
611
612/**
613 * Register a new user
614 *
615 * This registers a new user - Data is read directly from $_POST
616 *
617 * @author  Andreas Gohr <andi@splitbrain.org>
618 *
619 * @return bool  true on success, false on any error
620 */
621function register(){
622    global $lang;
623    global $conf;
624    global $auth;
625
626    if(!$_POST['save']) return false;
627    if(!$auth->canDo('addUser')) return false;
628
629    //clean username
630    $_POST['login'] = preg_replace('/.*:/','',$_POST['login']);
631    $_POST['login'] = cleanID($_POST['login']);
632    //clean fullname and email
633    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
634    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
635
636    if( empty($_POST['login']) ||
637        empty($_POST['fullname']) ||
638        empty($_POST['email']) ){
639        msg($lang['regmissing'],-1);
640        return false;
641    }
642
643    if ($conf['autopasswd']) {
644        $pass = auth_pwgen();                // automatically generate password
645    } elseif (empty($_POST['pass']) ||
646            empty($_POST['passchk'])) {
647        msg($lang['regmissing'], -1);        // complain about missing passwords
648        return false;
649    } elseif ($_POST['pass'] != $_POST['passchk']) {
650        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
651        return false;
652    } else {
653        $pass = $_POST['pass'];              // accept checked and valid password
654    }
655
656    //check mail
657    if(!mail_isvalid($_POST['email'])){
658        msg($lang['regbadmail'],-1);
659        return false;
660    }
661
662    //okay try to create the user
663    if(!$auth->triggerUserMod('create', array($_POST['login'],$pass,$_POST['fullname'],$_POST['email']))){
664        msg($lang['reguexists'],-1);
665        return false;
666    }
667
668    // create substitutions for use in notification email
669    $substitutions = array(
670            'NEWUSER' => $_POST['login'],
671            'NEWNAME' => $_POST['fullname'],
672            'NEWEMAIL' => $_POST['email'],
673            );
674
675    if (!$conf['autopasswd']) {
676        msg($lang['regsuccess2'],1);
677        notify('', 'register', '', $_POST['login'], false, $substitutions);
678        return true;
679    }
680
681    // autogenerated password? then send him the password
682    if (auth_sendPassword($_POST['login'],$pass)){
683        msg($lang['regsuccess'],1);
684        notify('', 'register', '', $_POST['login'], false, $substitutions);
685        return true;
686    }else{
687        msg($lang['regmailfail'],-1);
688        return false;
689    }
690}
691
692/**
693 * Update user profile
694 *
695 * @author    Christopher Smith <chris@jalakai.co.uk>
696 */
697function updateprofile() {
698    global $conf;
699    global $INFO;
700    global $lang;
701    global $auth;
702
703    if(empty($_POST['save'])) return false;
704    if(!checkSecurityToken()) return false;
705
706    // should not be able to get here without Profile being possible...
707    if(!$auth->canDo('Profile')) {
708        msg($lang['profna'],-1);
709        return false;
710    }
711
712    if ($_POST['newpass'] != $_POST['passchk']) {
713        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
714        return false;
715    }
716
717    //clean fullname and email
718    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
719    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
720
721    if (empty($_POST['fullname']) || empty($_POST['email'])) {
722        msg($lang['profnoempty'],-1);
723        return false;
724    }
725
726    if (!mail_isvalid($_POST['email'])){
727        msg($lang['regbadmail'],-1);
728        return false;
729    }
730
731    if ($_POST['fullname'] != $INFO['userinfo']['name'] && $auth->canDo('modName')) $changes['name'] = $_POST['fullname'];
732    if ($_POST['email'] != $INFO['userinfo']['mail'] && $auth->canDo('modMail')) $changes['mail'] = $_POST['email'];
733    if (!empty($_POST['newpass']) && $auth->canDo('modPass')) $changes['pass'] = $_POST['newpass'];
734
735    if (!count($changes)) {
736        msg($lang['profnochange'], -1);
737        return false;
738    }
739
740    if ($conf['profileconfirm']) {
741        if (!$auth->checkPass($_SERVER['REMOTE_USER'], $_POST['oldpass'])) {
742            msg($lang['badlogin'],-1);
743            return false;
744        }
745    }
746
747    if ($result = $auth->triggerUserMod('modify', array($_SERVER['REMOTE_USER'], $changes))) {
748        // update cookie and session with the changed data
749        $cookie = base64_decode($_COOKIE[DOKU_COOKIE]);
750        list($user,$sticky,$pass) = explode('|',$cookie,3);
751        if ($changes['pass']) $pass = PMA_blowfish_encrypt($changes['pass'],auth_cookiesalt());
752
753        auth_setCookie($_SERVER['REMOTE_USER'],$pass,(bool)$sticky);
754        return true;
755    }
756}
757
758/**
759 * Send a  new password
760 *
761 * This function handles both phases of the password reset:
762 *
763 *   - handling the first request of password reset
764 *   - validating the password reset auth token
765 *
766 * @author Benoit Chesneau <benoit@bchesneau.info>
767 * @author Chris Smith <chris@jalakai.co.uk>
768 * @author Andreas Gohr <andi@splitbrain.org>
769 *
770 * @return bool true on success, false on any error
771 */
772function act_resendpwd(){
773    global $lang;
774    global $conf;
775    global $auth;
776
777    if(!actionOK('resendpwd')) return false;
778
779    // should not be able to get here without modPass being possible...
780    if(!$auth->canDo('modPass')) {
781        msg($lang['resendna'],-1);
782        return false;
783    }
784
785    $token = preg_replace('/[^a-f0-9]+/','',$_REQUEST['pwauth']);
786
787    if($token){
788        // we're in token phase
789
790        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
791        if(!@file_exists($tfile)){
792            msg($lang['resendpwdbadauth'],-1);
793            return false;
794        }
795        $user = io_readfile($tfile);
796        @unlink($tfile);
797        $userinfo = $auth->getUserData($user);
798        if(!$userinfo['mail']) {
799            msg($lang['resendpwdnouser'], -1);
800            return false;
801        }
802
803        $pass = auth_pwgen();
804        if (!$auth->triggerUserMod('modify', array($user,array('pass' => $pass)))) {
805            msg('error modifying user data',-1);
806            return false;
807        }
808
809        if (auth_sendPassword($user,$pass)) {
810            msg($lang['resendpwdsuccess'],1);
811        } else {
812            msg($lang['regmailfail'],-1);
813        }
814        return true;
815
816    } else {
817        // we're in request phase
818
819        if(!$_POST['save']) return false;
820
821        if (empty($_POST['login'])) {
822            msg($lang['resendpwdmissing'], -1);
823            return false;
824        } else {
825            $_POST['login'] = preg_replace('/.*:/','',$_POST['login']);
826            $user = cleanID($_POST['login']);
827        }
828
829        $userinfo = $auth->getUserData($user);
830        if(!$userinfo['mail']) {
831            msg($lang['resendpwdnouser'], -1);
832            return false;
833        }
834
835        // generate auth token
836        $token = md5(auth_cookiesalt().$user); //secret but user based
837        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
838        $url = wl('',array('do'=>'resendpwd','pwauth'=>$token),true,'&');
839
840        io_saveFile($tfile,$user);
841
842        $text = rawLocale('pwconfirm');
843        $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
844        $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
845        $text = str_replace('@LOGIN@',$user,$text);
846        $text = str_replace('@TITLE@',$conf['title'],$text);
847        $text = str_replace('@CONFIRM@',$url,$text);
848
849        if(mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
850                     $lang['regpwmail'],
851                     $text,
852                     $conf['mailfrom'])){
853            msg($lang['resendpwdconfirm'],1);
854        }else{
855            msg($lang['regmailfail'],-1);
856        }
857        return true;
858    }
859
860    return false; // never reached
861}
862
863/**
864 * Encrypts a password using the given method and salt
865 *
866 * If the selected method needs a salt and none was given, a random one
867 * is chosen.
868 *
869 * The following methods are understood:
870 *
871 *   smd5  - Salted MD5 hashing
872 *   apr1  - Apache salted MD5 hashing
873 *   md5   - Simple MD5 hashing
874 *   sha1  - SHA1 hashing
875 *   ssha  - Salted SHA1 hashing
876 *   crypt - Unix crypt
877 *   mysql - MySQL password (old method)
878 *   my411 - MySQL 4.1.1 password
879 *   kmd5  - Salted MD5 hashing as used by UNB
880 *
881 * @author  Andreas Gohr <andi@splitbrain.org>
882 * @return  string  The crypted password
883 */
884function auth_cryptPassword($clear,$method='',$salt=null){
885    global $conf;
886    if(empty($method)) $method = $conf['passcrypt'];
887
888    //prepare a salt
889    if(is_null($salt)) $salt = md5(uniqid(rand(), true));
890
891    switch(strtolower($method)){
892        case 'smd5':
893            if(defined('CRYPT_MD5') && CRYPT_MD5) return crypt($clear,'$1$'.substr($salt,0,8).'$');
894            // when crypt can't handle SMD5, falls through to pure PHP implementation
895            $magic = '1';
896        case 'apr1':
897            //from http://de.php.net/manual/en/function.crypt.php#73619 comment by <mikey_nich at hotmail dot com>
898            if(!$magic) $magic = 'apr1';
899            $salt = substr($salt,0,8);
900            $len = strlen($clear);
901            $text = $clear.'$'.$magic.'$'.$salt;
902            $bin = pack("H32", md5($clear.$salt.$clear));
903            for($i = $len; $i > 0; $i -= 16) {
904                $text .= substr($bin, 0, min(16, $i));
905            }
906            for($i = $len; $i > 0; $i >>= 1) {
907                $text .= ($i & 1) ? chr(0) : $clear{0};
908            }
909            $bin = pack("H32", md5($text));
910            for($i = 0; $i < 1000; $i++) {
911                $new = ($i & 1) ? $clear : $bin;
912                if ($i % 3) $new .= $salt;
913                if ($i % 7) $new .= $clear;
914                $new .= ($i & 1) ? $bin : $clear;
915                $bin = pack("H32", md5($new));
916            }
917            $tmp = '';
918            for ($i = 0; $i < 5; $i++) {
919                $k = $i + 6;
920                $j = $i + 12;
921                if ($j == 16) $j = 5;
922                $tmp = $bin[$i].$bin[$k].$bin[$j].$tmp;
923            }
924            $tmp = chr(0).chr(0).$bin[11].$tmp;
925            $tmp = strtr(strrev(substr(base64_encode($tmp), 2)),
926                    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
927                    "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
928            return '$'.$magic.'$'.$salt.'$'.$tmp;
929        case 'md5':
930            return md5($clear);
931        case 'sha1':
932            return sha1($clear);
933        case 'ssha':
934            $salt=substr($salt,0,4);
935            return '{SSHA}'.base64_encode(pack("H*", sha1($clear.$salt)).$salt);
936        case 'crypt':
937            return crypt($clear,substr($salt,0,2));
938        case 'mysql':
939            //from http://www.php.net/mysql comment by <soren at byu dot edu>
940            $nr=0x50305735;
941            $nr2=0x12345671;
942            $add=7;
943            $charArr = preg_split("//", $clear);
944            foreach ($charArr as $char) {
945                if (($char == '') || ($char == ' ') || ($char == '\t')) continue;
946                $charVal = ord($char);
947                $nr ^= ((($nr & 63) + $add) * $charVal) + ($nr << 8);
948                $nr2 += ($nr2 << 8) ^ $nr;
949                $add += $charVal;
950            }
951            return sprintf("%08x%08x", ($nr & 0x7fffffff), ($nr2 & 0x7fffffff));
952        case 'my411':
953            return '*'.sha1(pack("H*", sha1($clear)));
954        case 'kmd5':
955            $key = substr($salt, 16, 2);
956            $hash1 = strtolower(md5($key . md5($clear)));
957            $hash2 = substr($hash1, 0, 16) . $key . substr($hash1, 16);
958            return $hash2;
959        default:
960            msg("Unsupported crypt method $method",-1);
961    }
962}
963
964/**
965 * Verifies a cleartext password against a crypted hash
966 *
967 * The method and salt used for the crypted hash is determined automatically
968 * then the clear text password is crypted using the same method. If both hashs
969 * match true is is returned else false
970 *
971 * @author  Andreas Gohr <andi@splitbrain.org>
972 * @return  bool
973 */
974function auth_verifyPassword($clear,$crypt){
975    $method='';
976    $salt='';
977
978    //determine the used method and salt
979    $len = strlen($crypt);
980    if(preg_match('/^\$1\$([^\$]{0,8})\$/',$crypt,$m)){
981        $method = 'smd5';
982        $salt   = $m[1];
983    }elseif(preg_match('/^\$apr1\$([^\$]{0,8})\$/',$crypt,$m)){
984        $method = 'apr1';
985        $salt   = $m[1];
986    }elseif(substr($crypt,0,6) == '{SSHA}'){
987        $method = 'ssha';
988        $salt   = substr(base64_decode(substr($crypt, 6)),20);
989    }elseif($len == 32){
990        $method = 'md5';
991    }elseif($len == 40){
992        $method = 'sha1';
993    }elseif($len == 16){
994        $method = 'mysql';
995    }elseif($len == 41 && $crypt[0] == '*'){
996        $method = 'my411';
997    }elseif($len == 34){
998        $method = 'kmd5';
999        $salt   = $crypt;
1000    }else{
1001        $method = 'crypt';
1002        $salt   = substr($crypt,0,2);
1003    }
1004
1005    //crypt and compare
1006    if(auth_cryptPassword($clear,$method,$salt) === $crypt){
1007        return true;
1008    }
1009    return false;
1010}
1011
1012/**
1013 * Set the authentication cookie and add user identification data to the session
1014 *
1015 * @param string  $user       username
1016 * @param string  $pass       encrypted password
1017 * @param bool    $sticky     whether or not the cookie will last beyond the session
1018 */
1019function auth_setCookie($user,$pass,$sticky) {
1020    global $conf;
1021    global $auth;
1022    global $USERINFO;
1023
1024    $USERINFO = $auth->getUserData($user);
1025
1026    // set cookie
1027    $cookie = base64_encode($user).'|'.((int) $sticky).'|'.base64_encode($pass);
1028    $time = $sticky ? (time()+60*60*24*365) : 0; //one year
1029    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
1030        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
1031    }else{
1032        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
1033    }
1034    // set session
1035    $_SESSION[DOKU_COOKIE]['auth']['user'] = $user;
1036    $_SESSION[DOKU_COOKIE]['auth']['pass'] = $pass;
1037    $_SESSION[DOKU_COOKIE]['auth']['buid'] = auth_browseruid();
1038    $_SESSION[DOKU_COOKIE]['auth']['info'] = $USERINFO;
1039    $_SESSION[DOKU_COOKIE]['auth']['time'] = time();
1040}
1041
1042/**
1043 * Returns the user, (encrypted) password and sticky bit from cookie
1044 *
1045 * @returns array
1046 */
1047function auth_getCookie(){
1048    if (!isset($_COOKIE[DOKU_COOKIE])) {
1049        return array(null, null, null);
1050    }
1051    list($user,$sticky,$pass) = explode('|',$_COOKIE[DOKU_COOKIE],3);
1052    $sticky = (bool) $sticky;
1053    $pass   = base64_decode($pass);
1054    $user   = base64_decode($user);
1055    return array($user,$sticky,$pass);
1056}
1057
1058//Setup VIM: ex: et ts=2 enc=utf-8 :
1059