xref: /dokuwiki/inc/auth.php (revision ab24fc7f2b46da9840c7a6a441c67d433f32a28e) 
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            $_REQUEST['http_credentials'] = true;
75        }
76
77        if($_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))   $user   = $_SERVER['REMOTE_USER'];
340    if(is_null($groups)) $groups = (array) $USERINFO['grps'];
341    $user   = auth_nameencode($user);
342
343    // check username against superuser and manager
344    $superusers = explode(',', $conf['superuser']);
345    $superusers = array_unique($superusers);
346    $superusers = array_map('trim', $superusers);
347    // prepare an array containing only true values for array_map call
348    $alltrue = array_fill(0, count($superusers), true);
349    $superusers = array_map('auth_nameencode', $superusers, $alltrue);
350    if(in_array($user, $superusers)) return true;
351
352    if(!$adminonly){
353        $managers = explode(',', $conf['manager']);
354        $managers = array_unique($managers);
355        $managers = array_map('trim', $managers);
356        // prepare an array containing only true values for array_map call
357        $alltrue = array_fill(0, count($managers), true);
358        $managers = array_map('auth_nameencode', $managers, $alltrue);
359        if(in_array($user, $managers)) return true;
360    }
361
362    // check user's groups against superuser and manager
363    if (!empty($groups)) {
364
365        //prepend groups with @ and nameencode
366        $cnt = count($groups);
367        for($i=0; $i<$cnt; $i++){
368            $groups[$i] = '@'.auth_nameencode($groups[$i]);
369        }
370
371        // check groups against superuser and manager
372        foreach($superusers as $supu)
373            if(in_array($supu, $groups)) return true;
374        if(!$adminonly){
375            foreach($managers as $mana)
376                if(in_array($mana, $groups)) return true;
377        }
378    }
379
380    return false;
381}
382
383/**
384 * Check if a user is admin
385 *
386 * Alias to auth_ismanager with adminonly=true
387 *
388 * The info is available through $INFO['isadmin'], too
389 *
390 * @author Andreas Gohr <andi@splitbrain.org>
391 * @see auth_ismanager
392 */
393function auth_isadmin($user=null,$groups=null){
394    return auth_ismanager($user,$groups,true);
395}
396
397/**
398 * Convinience function for auth_aclcheck()
399 *
400 * This checks the permissions for the current user
401 *
402 * @author  Andreas Gohr <andi@splitbrain.org>
403 *
404 * @param  string  $id  page ID (needs to be resolved and cleaned)
405 * @return int          permission level
406 */
407function auth_quickaclcheck($id){
408    global $conf;
409    global $USERINFO;
410    # if no ACL is used always return upload rights
411    if(!$conf['useacl']) return AUTH_UPLOAD;
412    return auth_aclcheck($id,$_SERVER['REMOTE_USER'],$USERINFO['grps']);
413}
414
415/**
416 * Returns the maximum rights a user has for
417 * the given ID or its namespace
418 *
419 * @author  Andreas Gohr <andi@splitbrain.org>
420 *
421 * @param  string  $id     page ID (needs to be resolved and cleaned)
422 * @param  string  $user   Username
423 * @param  array   $groups Array of groups the user is in
424 * @return int             permission level
425 */
426function auth_aclcheck($id,$user,$groups){
427    global $conf;
428    global $AUTH_ACL;
429
430    // if no ACL is used always return upload rights
431    if(!$conf['useacl']) return AUTH_UPLOAD;
432
433    //make sure groups is an array
434    if(!is_array($groups)) $groups = array();
435
436    //if user is superuser or in superusergroup return 255 (acl_admin)
437    if(auth_isadmin($user,$groups)) { return AUTH_ADMIN; }
438
439    $user = auth_nameencode($user);
440
441    //prepend groups with @ and nameencode
442    $cnt = count($groups);
443    for($i=0; $i<$cnt; $i++){
444        $groups[$i] = '@'.auth_nameencode($groups[$i]);
445    }
446
447    $ns    = getNS($id);
448    $perm  = -1;
449
450    if($user || count($groups)){
451        //add ALL group
452        $groups[] = '@ALL';
453        //add User
454        if($user) $groups[] = $user;
455        //build regexp
456        $regexp   = join('|',$groups);
457    }else{
458        $regexp = '@ALL';
459    }
460
461    //check exact match first
462    $matches = preg_grep('/^'.preg_quote($id,'/').'\s+('.$regexp.')\s+/',$AUTH_ACL);
463    if(count($matches)){
464        foreach($matches as $match){
465            $match = preg_replace('/#.*$/','',$match); //ignore comments
466            $acl   = preg_split('/\s+/',$match);
467            if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
468            if($acl[2] > $perm){
469                $perm = $acl[2];
470            }
471        }
472        if($perm > -1){
473            //we had a match - return it
474            return $perm;
475        }
476    }
477
478    //still here? do the namespace checks
479    if($ns){
480        $path = $ns.':\*';
481    }else{
482        $path = '\*'; //root document
483    }
484
485    do{
486        $matches = preg_grep('/^'.$path.'\s+('.$regexp.')\s+/',$AUTH_ACL);
487        if(count($matches)){
488            foreach($matches as $match){
489                $match = preg_replace('/#.*$/','',$match); //ignore comments
490                $acl   = preg_split('/\s+/',$match);
491                if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
492                if($acl[2] > $perm){
493                    $perm = $acl[2];
494                }
495            }
496            //we had a match - return it
497            return $perm;
498        }
499
500        //get next higher namespace
501        $ns   = getNS($ns);
502
503        if($path != '\*'){
504            $path = $ns.':\*';
505            if($path == ':\*') $path = '\*';
506        }else{
507            //we did this already
508            //looks like there is something wrong with the ACL
509            //break here
510            msg('No ACL setup yet! Denying access to everyone.');
511            return AUTH_NONE;
512        }
513    }while(1); //this should never loop endless
514
515    //still here? return no permissions
516    return AUTH_NONE;
517}
518
519/**
520 * Encode ASCII special chars
521 *
522 * Some auth backends allow special chars in their user and groupnames
523 * The special chars are encoded with this function. Only ASCII chars
524 * are encoded UTF-8 multibyte are left as is (different from usual
525 * urlencoding!).
526 *
527 * Decoding can be done with rawurldecode
528 *
529 * @author Andreas Gohr <gohr@cosmocode.de>
530 * @see rawurldecode()
531 */
532function auth_nameencode($name,$skip_group=false){
533    global $cache_authname;
534    $cache =& $cache_authname;
535    $name  = (string) $name;
536
537    if (!isset($cache[$name][$skip_group])) {
538        if($skip_group && $name{0} =='@'){
539            $cache[$name][$skip_group] = '@'.preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
540                    "'%'.dechex(ord(substr('\\1',-1)))",substr($name,1));
541        }else{
542            $cache[$name][$skip_group] = preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
543                    "'%'.dechex(ord(substr('\\1',-1)))",$name);
544        }
545    }
546
547    return $cache[$name][$skip_group];
548}
549
550/**
551 * Create a pronouncable password
552 *
553 * @author  Andreas Gohr <andi@splitbrain.org>
554 * @link    http://www.phpbuilder.com/annotate/message.php3?id=1014451
555 *
556 * @return string  pronouncable password
557 */
558function auth_pwgen(){
559    $pw = '';
560    $c  = 'bcdfghjklmnprstvwz'; //consonants except hard to speak ones
561    $v  = 'aeiou';              //vowels
562    $a  = $c.$v;                //both
563
564    //use two syllables...
565    for($i=0;$i < 2; $i++){
566        $pw .= $c[rand(0, strlen($c)-1)];
567        $pw .= $v[rand(0, strlen($v)-1)];
568        $pw .= $a[rand(0, strlen($a)-1)];
569    }
570    //... and add a nice number
571    $pw .= rand(10,99);
572
573    return $pw;
574}
575
576/**
577 * Sends a password to the given user
578 *
579 * @author  Andreas Gohr <andi@splitbrain.org>
580 *
581 * @return bool  true on success
582 */
583function auth_sendPassword($user,$password){
584    global $conf;
585    global $lang;
586    global $auth;
587
588    $hdrs  = '';
589    $userinfo = $auth->getUserData($user);
590
591    if(!$userinfo['mail']) return false;
592
593    $text = rawLocale('password');
594    $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
595    $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
596    $text = str_replace('@LOGIN@',$user,$text);
597    $text = str_replace('@PASSWORD@',$password,$text);
598    $text = str_replace('@TITLE@',$conf['title'],$text);
599
600    return mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
601            $lang['regpwmail'],
602            $text,
603            $conf['mailfrom']);
604}
605
606/**
607 * Register a new user
608 *
609 * This registers a new user - Data is read directly from $_POST
610 *
611 * @author  Andreas Gohr <andi@splitbrain.org>
612 *
613 * @return bool  true on success, false on any error
614 */
615function register(){
616    global $lang;
617    global $conf;
618    global $auth;
619
620    if(!$_POST['save']) return false;
621    if(!$auth->canDo('addUser')) return false;
622
623    //clean username
624    $_POST['login'] = preg_replace('/.*:/','',$_POST['login']);
625    $_POST['login'] = cleanID($_POST['login']);
626    //clean fullname and email
627    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
628    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
629
630    if( empty($_POST['login']) ||
631        empty($_POST['fullname']) ||
632        empty($_POST['email']) ){
633        msg($lang['regmissing'],-1);
634        return false;
635    }
636
637    if ($conf['autopasswd']) {
638        $pass = auth_pwgen();                // automatically generate password
639    } elseif (empty($_POST['pass']) ||
640            empty($_POST['passchk'])) {
641        msg($lang['regmissing'], -1);        // complain about missing passwords
642        return false;
643    } elseif ($_POST['pass'] != $_POST['passchk']) {
644        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
645        return false;
646    } else {
647        $pass = $_POST['pass'];              // accept checked and valid password
648    }
649
650    //check mail
651    if(!mail_isvalid($_POST['email'])){
652        msg($lang['regbadmail'],-1);
653        return false;
654    }
655
656    //okay try to create the user
657    if(!$auth->triggerUserMod('create', array($_POST['login'],$pass,$_POST['fullname'],$_POST['email']))){
658        msg($lang['reguexists'],-1);
659        return false;
660    }
661
662    // create substitutions for use in notification email
663    $substitutions = array(
664            'NEWUSER' => $_POST['login'],
665            'NEWNAME' => $_POST['fullname'],
666            'NEWEMAIL' => $_POST['email'],
667            );
668
669    if (!$conf['autopasswd']) {
670        msg($lang['regsuccess2'],1);
671        notify('', 'register', '', $_POST['login'], false, $substitutions);
672        return true;
673    }
674
675    // autogenerated password? then send him the password
676    if (auth_sendPassword($_POST['login'],$pass)){
677        msg($lang['regsuccess'],1);
678        notify('', 'register', '', $_POST['login'], false, $substitutions);
679        return true;
680    }else{
681        msg($lang['regmailfail'],-1);
682        return false;
683    }
684}
685
686/**
687 * Update user profile
688 *
689 * @author    Christopher Smith <chris@jalakai.co.uk>
690 */
691function updateprofile() {
692    global $conf;
693    global $INFO;
694    global $lang;
695    global $auth;
696
697    if(empty($_POST['save'])) return false;
698    if(!checkSecurityToken()) return false;
699
700    // should not be able to get here without Profile being possible...
701    if(!$auth->canDo('Profile')) {
702        msg($lang['profna'],-1);
703        return false;
704    }
705
706    if ($_POST['newpass'] != $_POST['passchk']) {
707        msg($lang['regbadpass'], -1);      // complain about misspelled passwords
708        return false;
709    }
710
711    //clean fullname and email
712    $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
713    $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
714
715    if (empty($_POST['fullname']) || empty($_POST['email'])) {
716        msg($lang['profnoempty'],-1);
717        return false;
718    }
719
720    if (!mail_isvalid($_POST['email'])){
721        msg($lang['regbadmail'],-1);
722        return false;
723    }
724
725    if ($_POST['fullname'] != $INFO['userinfo']['name'] && $auth->canDo('modName')) $changes['name'] = $_POST['fullname'];
726    if ($_POST['email'] != $INFO['userinfo']['mail'] && $auth->canDo('modMail')) $changes['mail'] = $_POST['email'];
727    if (!empty($_POST['newpass']) && $auth->canDo('modPass')) $changes['pass'] = $_POST['newpass'];
728
729    if (!count($changes)) {
730        msg($lang['profnochange'], -1);
731        return false;
732    }
733
734    if ($conf['profileconfirm']) {
735        if (!$auth->checkPass($_SERVER['REMOTE_USER'], $_POST['oldpass'])) {
736            msg($lang['badlogin'],-1);
737            return false;
738        }
739    }
740
741    if ($result = $auth->triggerUserMod('modify', array($_SERVER['REMOTE_USER'], $changes))) {
742        // update cookie and session with the changed data
743        $cookie = base64_decode($_COOKIE[DOKU_COOKIE]);
744        list($user,$sticky,$pass) = explode('|',$cookie,3);
745        if ($changes['pass']) $pass = PMA_blowfish_encrypt($changes['pass'],auth_cookiesalt());
746
747        auth_setCookie($_SERVER['REMOTE_USER'],$pass,(bool)$sticky);
748        return true;
749    }
750}
751
752/**
753 * Send a  new password
754 *
755 * This function handles both phases of the password reset:
756 *
757 *   - handling the first request of password reset
758 *   - validating the password reset auth token
759 *
760 * @author Benoit Chesneau <benoit@bchesneau.info>
761 * @author Chris Smith <chris@jalakai.co.uk>
762 * @author Andreas Gohr <andi@splitbrain.org>
763 *
764 * @return bool true on success, false on any error
765 */
766function act_resendpwd(){
767    global $lang;
768    global $conf;
769    global $auth;
770
771    if(!actionOK('resendpwd')) return false;
772
773    // should not be able to get here without modPass being possible...
774    if(!$auth->canDo('modPass')) {
775        msg($lang['resendna'],-1);
776        return false;
777    }
778
779    $token = preg_replace('/[^a-f0-9]+/','',$_REQUEST['pwauth']);
780
781    if($token){
782        // we're in token phase
783
784        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
785        if(!@file_exists($tfile)){
786            msg($lang['resendpwdbadauth'],-1);
787            return false;
788        }
789        $user = io_readfile($tfile);
790        @unlink($tfile);
791        $userinfo = $auth->getUserData($user);
792        if(!$userinfo['mail']) {
793            msg($lang['resendpwdnouser'], -1);
794            return false;
795        }
796
797        $pass = auth_pwgen();
798        if (!$auth->triggerUserMod('modify', array($user,array('pass' => $pass)))) {
799            msg('error modifying user data',-1);
800            return false;
801        }
802
803        if (auth_sendPassword($user,$pass)) {
804            msg($lang['resendpwdsuccess'],1);
805        } else {
806            msg($lang['regmailfail'],-1);
807        }
808        return true;
809
810    } else {
811        // we're in request phase
812
813        if(!$_POST['save']) return false;
814
815        if (empty($_POST['login'])) {
816            msg($lang['resendpwdmissing'], -1);
817            return false;
818        } else {
819            $_POST['login'] = preg_replace('/.*:/','',$_POST['login']);
820            $user = cleanID($_POST['login']);
821        }
822
823        $userinfo = $auth->getUserData($user);
824        if(!$userinfo['mail']) {
825            msg($lang['resendpwdnouser'], -1);
826            return false;
827        }
828
829        // generate auth token
830        $token = md5(auth_cookiesalt().$user); //secret but user based
831        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
832        $url = wl('',array('do'=>'resendpwd','pwauth'=>$token),true,'&');
833
834        io_saveFile($tfile,$user);
835
836        $text = rawLocale('pwconfirm');
837        $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
838        $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
839        $text = str_replace('@LOGIN@',$user,$text);
840        $text = str_replace('@TITLE@',$conf['title'],$text);
841        $text = str_replace('@CONFIRM@',$url,$text);
842
843        if(mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
844                     $lang['regpwmail'],
845                     $text,
846                     $conf['mailfrom'])){
847            msg($lang['resendpwdconfirm'],1);
848        }else{
849            msg($lang['regmailfail'],-1);
850        }
851        return true;
852    }
853
854    return false; // never reached
855}
856
857/**
858 * Encrypts a password using the given method and salt
859 *
860 * If the selected method needs a salt and none was given, a random one
861 * is chosen.
862 *
863 * The following methods are understood:
864 *
865 *   smd5  - Salted MD5 hashing
866 *   apr1  - Apache salted MD5 hashing
867 *   md5   - Simple MD5 hashing
868 *   sha1  - SHA1 hashing
869 *   ssha  - Salted SHA1 hashing
870 *   crypt - Unix crypt
871 *   mysql - MySQL password (old method)
872 *   my411 - MySQL 4.1.1 password
873 *   kmd5  - Salted MD5 hashing as used by UNB
874 *
875 * @author  Andreas Gohr <andi@splitbrain.org>
876 * @return  string  The crypted password
877 */
878function auth_cryptPassword($clear,$method='',$salt=null){
879    global $conf;
880    if(empty($method)) $method = $conf['passcrypt'];
881
882    //prepare a salt
883    if(is_null($salt)) $salt = md5(uniqid(rand(), true));
884
885    switch(strtolower($method)){
886        case 'smd5':
887            if(defined('CRYPT_MD5') && CRYPT_MD5) return crypt($clear,'$1$'.substr($salt,0,8).'$');
888            // when crypt can't handle SMD5, falls through to pure PHP implementation
889            $magic = '1';
890        case 'apr1':
891            //from http://de.php.net/manual/en/function.crypt.php#73619 comment by <mikey_nich at hotmail dot com>
892            if(!$magic) $magic = 'apr1';
893            $salt = substr($salt,0,8);
894            $len = strlen($clear);
895            $text = $clear.'$'.$magic.'$'.$salt;
896            $bin = pack("H32", md5($clear.$salt.$clear));
897            for($i = $len; $i > 0; $i -= 16) {
898                $text .= substr($bin, 0, min(16, $i));
899            }
900            for($i = $len; $i > 0; $i >>= 1) {
901                $text .= ($i & 1) ? chr(0) : $clear{0};
902            }
903            $bin = pack("H32", md5($text));
904            for($i = 0; $i < 1000; $i++) {
905                $new = ($i & 1) ? $clear : $bin;
906                if ($i % 3) $new .= $salt;
907                if ($i % 7) $new .= $clear;
908                $new .= ($i & 1) ? $bin : $clear;
909                $bin = pack("H32", md5($new));
910            }
911            $tmp = '';
912            for ($i = 0; $i < 5; $i++) {
913                $k = $i + 6;
914                $j = $i + 12;
915                if ($j == 16) $j = 5;
916                $tmp = $bin[$i].$bin[$k].$bin[$j].$tmp;
917            }
918            $tmp = chr(0).chr(0).$bin[11].$tmp;
919            $tmp = strtr(strrev(substr(base64_encode($tmp), 2)),
920                    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
921                    "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
922            return '$'.$magic.'$'.$salt.'$'.$tmp;
923        case 'md5':
924            return md5($clear);
925        case 'sha1':
926            return sha1($clear);
927        case 'ssha':
928            $salt=substr($salt,0,4);
929            return '{SSHA}'.base64_encode(pack("H*", sha1($clear.$salt)).$salt);
930        case 'crypt':
931            return crypt($clear,substr($salt,0,2));
932        case 'mysql':
933            //from http://www.php.net/mysql comment by <soren at byu dot edu>
934            $nr=0x50305735;
935            $nr2=0x12345671;
936            $add=7;
937            $charArr = preg_split("//", $clear);
938            foreach ($charArr as $char) {
939                if (($char == '') || ($char == ' ') || ($char == '\t')) continue;
940                $charVal = ord($char);
941                $nr ^= ((($nr & 63) + $add) * $charVal) + ($nr << 8);
942                $nr2 += ($nr2 << 8) ^ $nr;
943                $add += $charVal;
944            }
945            return sprintf("%08x%08x", ($nr & 0x7fffffff), ($nr2 & 0x7fffffff));
946        case 'my411':
947            return '*'.sha1(pack("H*", sha1($clear)));
948        case 'kmd5':
949            $key = substr($salt, 16, 2);
950            $hash1 = strtolower(md5($key . md5($clear)));
951            $hash2 = substr($hash1, 0, 16) . $key . substr($hash1, 16);
952            return $hash2;
953        default:
954            msg("Unsupported crypt method $method",-1);
955    }
956}
957
958/**
959 * Verifies a cleartext password against a crypted hash
960 *
961 * The method and salt used for the crypted hash is determined automatically
962 * then the clear text password is crypted using the same method. If both hashs
963 * match true is is returned else false
964 *
965 * @author  Andreas Gohr <andi@splitbrain.org>
966 * @return  bool
967 */
968function auth_verifyPassword($clear,$crypt){
969    $method='';
970    $salt='';
971
972    //determine the used method and salt
973    $len = strlen($crypt);
974    if(preg_match('/^\$1\$([^\$]{0,8})\$/',$crypt,$m)){
975        $method = 'smd5';
976        $salt   = $m[1];
977    }elseif(preg_match('/^\$apr1\$([^\$]{0,8})\$/',$crypt,$m)){
978        $method = 'apr1';
979        $salt   = $m[1];
980    }elseif(substr($crypt,0,6) == '{SSHA}'){
981        $method = 'ssha';
982        $salt   = substr(base64_decode(substr($crypt, 6)),20);
983    }elseif($len == 32){
984        $method = 'md5';
985    }elseif($len == 40){
986        $method = 'sha1';
987    }elseif($len == 16){
988        $method = 'mysql';
989    }elseif($len == 41 && $crypt[0] == '*'){
990        $method = 'my411';
991    }elseif($len == 34){
992        $method = 'kmd5';
993        $salt   = $crypt;
994    }else{
995        $method = 'crypt';
996        $salt   = substr($crypt,0,2);
997    }
998
999    //crypt and compare
1000    if(auth_cryptPassword($clear,$method,$salt) === $crypt){
1001        return true;
1002    }
1003    return false;
1004}
1005
1006/**
1007 * Set the authentication cookie and add user identification data to the session
1008 *
1009 * @param string  $user       username
1010 * @param string  $pass       encrypted password
1011 * @param bool    $sticky     whether or not the cookie will last beyond the session
1012 */
1013function auth_setCookie($user,$pass,$sticky) {
1014    global $conf;
1015    global $auth;
1016    global $USERINFO;
1017
1018    $USERINFO = $auth->getUserData($user);
1019
1020    // set cookie
1021    $cookie = base64_encode($user).'|'.((int) $sticky).'|'.base64_encode($pass);
1022    if($sticky) $time = time()+60*60*24*365; //one year
1023    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
1024        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
1025    }else{
1026        setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
1027    }
1028    // set session
1029    $_SESSION[DOKU_COOKIE]['auth']['user'] = $user;
1030    $_SESSION[DOKU_COOKIE]['auth']['pass'] = $pass;
1031    $_SESSION[DOKU_COOKIE]['auth']['buid'] = auth_browseruid();
1032    $_SESSION[DOKU_COOKIE]['auth']['info'] = $USERINFO;
1033    $_SESSION[DOKU_COOKIE]['auth']['time'] = time();
1034}
1035
1036/**
1037 * Returns the user, (encrypted) password and sticky bit from cookie
1038 *
1039 * @returns array
1040 */
1041function auth_getCookie(){
1042    list($user,$sticky,$pass) = explode('|',$_COOKIE[DOKU_COOKIE],3);
1043    $sticky = (bool) $sticky;
1044    $pass   = base64_decode($pass);
1045    $user   = base64_decode($user);
1046    return array($user,$sticky,$pass);
1047}
1048
1049//Setup VIM: ex: et ts=2 enc=utf-8 :
1050