xref: /dokuwiki/inc/auth.php (revision b446308f29808c2df119fd3d79cfb9ac2e49e7ac) 
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
12  if(!defined('DOKU_INC')) die('meh.');
13  require_once(DOKU_INC.'inc/common.php');
14  require_once(DOKU_INC.'inc/io.php');
15
16  // some ACL level defines
17  define('AUTH_NONE',0);
18  define('AUTH_READ',1);
19  define('AUTH_EDIT',2);
20  define('AUTH_CREATE',4);
21  define('AUTH_UPLOAD',8);
22  define('AUTH_DELETE',16);
23  define('AUTH_ADMIN',255);
24
25  global $conf;
26
27  if($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
56  if($conf['useacl']){
57    if($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            'action'   => $ACT,
86            'user'     => $_REQUEST['u'],
87            'password' => $_REQUEST['p'],
88            'sticky'   => $_REQUEST['r'],
89            'silent'   => $_REQUEST['http_credentials'],
90        );
91        $evt = new Doku_Event('AUTH_LOGIN_CHECK',$evdata);
92        if($evt->advise_before()){
93            auth_login($evdata['user'],
94                       $evdata['password'],
95                       $evdata['sticky'],
96                       $evdata['silent']);
97        }
98        $evt->advise_after();
99        unset($evt);
100        unset($evdata);
101      }
102    }
103
104    //load ACL into a global array
105    global $AUTH_ACL;
106    if(is_readable(DOKU_CONF.'acl.auth.php')){
107      $AUTH_ACL = file(DOKU_CONF.'acl.auth.php');
108      if(isset($_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    $cookie = base64_decode($_COOKIE[DOKU_COOKIE]);
169    list($user,$sticky,$pass) = split('\|',$cookie,3);
170    // get session info
171    $session = $_SESSION[DOKU_COOKIE]['auth'];
172    if($user && $pass){
173      // we got a cookie - see if we can trust it
174      if(isset($session) &&
175        $auth->useSessionCache($user) &&
176        ($session['time'] >= time()-$conf['auth_security_timeout']) &&
177        ($session['user'] == $user) &&
178        ($session['pass'] == $pass) &&  //still crypted
179        ($session['buid'] == auth_browseruid()) ){
180        // he has session, cookie and browser right - let him in
181        $_SERVER['REMOTE_USER'] = $user;
182        $USERINFO = $session['info']; //FIXME move all references to session
183        return true;
184      }
185      // no we don't trust it yet - recheck pass but silent
186      $pass = PMA_blowfish_decrypt($pass,auth_cookiesalt());
187      return auth_login($user,$pass,$sticky,true);
188    }
189  }
190  //just to be sure
191  auth_logoff(true);
192  return false;
193}
194
195/**
196 * Checks if a given authentication token was stored in the session
197 *
198 * Will setup authentication data using data from the session if the
199 * token is correct. Will exit with a 401 Status if not.
200 *
201 * @author Andreas Gohr <andi@splitbrain.org>
202 * @param  string $token The authentication token
203 * @return boolean true (or will exit on failure)
204 */
205function auth_validateToken($token){
206    if(!$token || $token != $_SESSION[DOKU_COOKIE]['auth']['token']){
207        // bad token
208        header("HTTP/1.0 401 Unauthorized");
209        print 'Invalid auth token - maybe the session timed out';
210        unset($_SESSION[DOKU_COOKIE]['auth']['token']); // no second chance
211        exit;
212    }
213    // still here? trust the session data
214    global $USERINFO;
215    $_SERVER['REMOTE_USER'] = $_SESSION[DOKU_COOKIE]['auth']['user'];
216    $USERINFO = $_SESSION[DOKU_COOKIE]['auth']['info'];
217    return true;
218}
219
220/**
221 * Create an auth token and store it in the session
222 *
223 * NOTE: this is completely unrelated to the getSecurityToken() function
224 *
225 * @author Andreas Gohr <andi@splitbrain.org>
226 * @return string The auth token
227 */
228function auth_createToken(){
229    $token = md5(mt_rand());
230    @session_start(); // reopen the session if needed
231    $_SESSION[DOKU_COOKIE]['auth']['token'] = $token;
232    session_write_close();
233    return $token;
234}
235
236/**
237 * Builds a pseudo UID from browser and IP data
238 *
239 * This is neither unique nor unfakable - still it adds some
240 * security. Using the first part of the IP makes sure
241 * proxy farms like AOLs are stil okay.
242 *
243 * @author  Andreas Gohr <andi@splitbrain.org>
244 *
245 * @return  string  a MD5 sum of various browser headers
246 */
247function auth_browseruid(){
248  $ip   = clientIP(true);
249  $uid  = '';
250  $uid .= $_SERVER['HTTP_USER_AGENT'];
251  $uid .= $_SERVER['HTTP_ACCEPT_ENCODING'];
252  $uid .= $_SERVER['HTTP_ACCEPT_LANGUAGE'];
253  $uid .= $_SERVER['HTTP_ACCEPT_CHARSET'];
254  $uid .= substr($ip,0,strpos($ip,'.'));
255  return md5($uid);
256}
257
258/**
259 * Creates a random key to encrypt the password in cookies
260 *
261 * This function tries to read the password for encrypting
262 * cookies from $conf['metadir'].'/_htcookiesalt'
263 * if no such file is found a random key is created and
264 * and stored in this file.
265 *
266 * @author  Andreas Gohr <andi@splitbrain.org>
267 *
268 * @return  string
269 */
270function auth_cookiesalt(){
271  global $conf;
272  $file = $conf['metadir'].'/_htcookiesalt';
273  $salt = io_readFile($file);
274  if(empty($salt)){
275    $salt = uniqid(rand(),true);
276    io_saveFile($file,$salt);
277  }
278  return $salt;
279}
280
281/**
282 * Log out the current user
283 *
284 * This clears all authentication data and thus log the user
285 * off. It also clears session data.
286 *
287 * @author  Andreas Gohr <andi@splitbrain.org>
288 * @param bool $keepbc - when true, the breadcrumb data is not cleared
289 */
290function auth_logoff($keepbc=false){
291  global $conf;
292  global $USERINFO;
293  global $INFO, $ID;
294  global $auth;
295
296  // make sure the session is writable (it usually is)
297  @session_start();
298
299  if(isset($_SESSION[DOKU_COOKIE]['auth']['user']))
300    unset($_SESSION[DOKU_COOKIE]['auth']['user']);
301  if(isset($_SESSION[DOKU_COOKIE]['auth']['pass']))
302    unset($_SESSION[DOKU_COOKIE]['auth']['pass']);
303  if(isset($_SESSION[DOKU_COOKIE]['auth']['info']))
304    unset($_SESSION[DOKU_COOKIE]['auth']['info']);
305  if(!$keepbc && isset($_SESSION[DOKU_COOKIE]['bc']))
306    unset($_SESSION[DOKU_COOKIE]['bc']);
307  if(isset($_SERVER['REMOTE_USER']))
308    unset($_SERVER['REMOTE_USER']);
309  $USERINFO=null; //FIXME
310
311  if (version_compare(PHP_VERSION, '5.2.0', '>')) {
312    setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
313  }else{
314    setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
315  }
316
317  if($auth && $auth->canDo('logoff')){
318    $auth->logOff();
319  }
320}
321
322/**
323 * Check if a user is a manager
324 *
325 * Should usually be called without any parameters to check the current
326 * user.
327 *
328 * The info is available through $INFO['ismanager'], too
329 *
330 * @author Andreas Gohr <andi@splitbrain.org>
331 * @see    auth_isadmin
332 * @param  string user      - Username
333 * @param  array  groups    - List of groups the user is in
334 * @param  bool   adminonly - when true checks if user is admin
335 */
336function auth_ismanager($user=null,$groups=null,$adminonly=false){
337  global $conf;
338  global $USERINFO;
339
340  if(!$conf['useacl']) return false;
341  if(is_null($user))   $user   = $_SERVER['REMOTE_USER'];
342  if(is_null($groups)) $groups = (array) $USERINFO['grps'];
343  $user   = auth_nameencode($user);
344
345  // check username against superuser and manager
346  $superusers = explode(',', $conf['superuser']);
347  $superusers = array_unique($superusers);
348  $superusers = array_map('trim', $superusers);
349  // prepare an array containing only true values for array_map call
350  $alltrue = array_fill(0, count($superusers), true);
351  $superusers = array_map('auth_nameencode', $superusers, $alltrue);
352  if(in_array($user, $superusers)) return true;
353
354  if(!$adminonly){
355    $managers = explode(',', $conf['manager']);
356    $managers = array_unique($managers);
357    $managers = array_map('trim', $managers);
358    // prepare an array containing only true values for array_map call
359    $alltrue = array_fill(0, count($managers), true);
360    $managers = array_map('auth_nameencode', $managers, $alltrue);
361    if(in_array($user, $managers)) return true;
362  }
363
364  // check user's groups against superuser and manager
365  if (!empty($groups)) {
366
367    //prepend groups with @ and nameencode
368    $cnt = count($groups);
369    for($i=0; $i<$cnt; $i++){
370      $groups[$i] = '@'.auth_nameencode($groups[$i]);
371    }
372
373    // check groups against superuser and manager
374    foreach($superusers as $supu)
375      if(in_array($supu, $groups)) return true;
376    if(!$adminonly){
377      foreach($managers as $mana)
378        if(in_array($mana, $groups)) return true;
379    }
380  }
381
382  return false;
383}
384
385/**
386 * Check if a user is admin
387 *
388 * Alias to auth_ismanager with adminonly=true
389 *
390 * The info is available through $INFO['isadmin'], too
391 *
392 * @author Andreas Gohr <andi@splitbrain.org>
393 * @see auth_ismanager
394 */
395function auth_isadmin($user=null,$groups=null){
396  return auth_ismanager($user,$groups,true);
397}
398
399/**
400 * Convinience function for auth_aclcheck()
401 *
402 * This checks the permissions for the current user
403 *
404 * @author  Andreas Gohr <andi@splitbrain.org>
405 *
406 * @param  string  $id  page ID
407 * @return int          permission level
408 */
409function auth_quickaclcheck($id){
410  global $conf;
411  global $USERINFO;
412  # if no ACL is used always return upload rights
413  if(!$conf['useacl']) return AUTH_UPLOAD;
414  return auth_aclcheck($id,$_SERVER['REMOTE_USER'],$USERINFO['grps']);
415}
416
417/**
418 * Returns the maximum rights a user has for
419 * the given ID or its namespace
420 *
421 * @author  Andreas Gohr <andi@splitbrain.org>
422 *
423 * @param  string  $id     page ID
424 * @param  string  $user   Username
425 * @param  array   $groups Array of groups the user is in
426 * @return int             permission level
427 */
428function auth_aclcheck($id,$user,$groups){
429  global $conf;
430  global $AUTH_ACL;
431
432  // if no ACL is used always return upload rights
433  if(!$conf['useacl']) return AUTH_UPLOAD;
434
435  //make sure groups is an array
436  if(!is_array($groups)) $groups = array();
437
438  //if user is superuser or in superusergroup return 255 (acl_admin)
439  if(auth_isadmin($user,$groups)) { return AUTH_ADMIN; }
440
441  $user = auth_nameencode($user);
442
443  //prepend groups with @ and nameencode
444  $cnt = count($groups);
445  for($i=0; $i<$cnt; $i++){
446    $groups[$i] = '@'.auth_nameencode($groups[$i]);
447  }
448
449  $ns    = getNS($id);
450  $perm  = -1;
451
452  if($user || count($groups)){
453    //add ALL group
454    $groups[] = '@ALL';
455    //add User
456    if($user) $groups[] = $user;
457    //build regexp
458    $regexp   = join('|',$groups);
459  }else{
460    $regexp = '@ALL';
461  }
462
463  //check exact match first
464  $matches = preg_grep('/^'.preg_quote($id,'/').'\s+('.$regexp.')\s+/',$AUTH_ACL);
465  if(count($matches)){
466    foreach($matches as $match){
467      $match = preg_replace('/#.*$/','',$match); //ignore comments
468      $acl   = preg_split('/\s+/',$match);
469      if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
470      if($acl[2] > $perm){
471        $perm = $acl[2];
472      }
473    }
474    if($perm > -1){
475      //we had a match - return it
476      return $perm;
477    }
478  }
479
480  //still here? do the namespace checks
481  if($ns){
482    $path = $ns.':\*';
483  }else{
484    $path = '\*'; //root document
485  }
486
487  do{
488    $matches = preg_grep('/^'.$path.'\s+('.$regexp.')\s+/',$AUTH_ACL);
489    if(count($matches)){
490      foreach($matches as $match){
491        $match = preg_replace('/#.*$/','',$match); //ignore comments
492        $acl   = preg_split('/\s+/',$match);
493        if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
494        if($acl[2] > $perm){
495          $perm = $acl[2];
496        }
497      }
498      //we had a match - return it
499      return $perm;
500    }
501
502    //get next higher namespace
503    $ns   = getNS($ns);
504
505    if($path != '\*'){
506      $path = $ns.':\*';
507      if($path == ':\*') $path = '\*';
508    }else{
509      //we did this already
510      //looks like there is something wrong with the ACL
511      //break here
512      msg('No ACL setup yet! Denying access to everyone.');
513      return AUTH_NONE;
514    }
515  }while(1); //this should never loop endless
516
517  //still here? return no permissions
518  return AUTH_NONE;
519}
520
521/**
522 * Encode ASCII special chars
523 *
524 * Some auth backends allow special chars in their user and groupnames
525 * The special chars are encoded with this function. Only ASCII chars
526 * are encoded UTF-8 multibyte are left as is (different from usual
527 * urlencoding!).
528 *
529 * Decoding can be done with rawurldecode
530 *
531 * @author Andreas Gohr <gohr@cosmocode.de>
532 * @see rawurldecode()
533 */
534function auth_nameencode($name,$skip_group=false){
535  global $cache_authname;
536  $cache =& $cache_authname;
537  $name  = (string) $name;
538
539  if (!isset($cache[$name][$skip_group])) {
540    if($skip_group && $name{0} =='@'){
541      $cache[$name][$skip_group] = '@'.preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
542                                                    "'%'.dechex(ord(substr('\\1',-1)))",substr($name,1));
543    }else{
544      $cache[$name][$skip_group] = preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
545                                                "'%'.dechex(ord(substr('\\1',-1)))",$name);
546    }
547  }
548
549  return $cache[$name][$skip_group];
550}
551
552/**
553 * Create a pronouncable password
554 *
555 * @author  Andreas Gohr <andi@splitbrain.org>
556 * @link    http://www.phpbuilder.com/annotate/message.php3?id=1014451
557 *
558 * @return string  pronouncable password
559 */
560function auth_pwgen(){
561  $pw = '';
562  $c  = 'bcdfghjklmnprstvwz'; //consonants except hard to speak ones
563  $v  = 'aeiou';              //vowels
564  $a  = $c.$v;                //both
565
566  //use two syllables...
567  for($i=0;$i < 2; $i++){
568    $pw .= $c[rand(0, strlen($c)-1)];
569    $pw .= $v[rand(0, strlen($v)-1)];
570    $pw .= $a[rand(0, strlen($a)-1)];
571  }
572  //... and add a nice number
573  $pw .= rand(10,99);
574
575  return $pw;
576}
577
578/**
579 * Sends a password to the given user
580 *
581 * @author  Andreas Gohr <andi@splitbrain.org>
582 *
583 * @return bool  true on success
584 */
585function auth_sendPassword($user,$password){
586  global $conf;
587  global $lang;
588  global $auth;
589
590  $hdrs  = '';
591  $userinfo = $auth->getUserData($user);
592
593  if(!$userinfo['mail']) return false;
594
595  $text = rawLocale('password');
596  $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
597  $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
598  $text = str_replace('@LOGIN@',$user,$text);
599  $text = str_replace('@PASSWORD@',$password,$text);
600  $text = str_replace('@TITLE@',$conf['title'],$text);
601
602  return mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
603                   $lang['regpwmail'],
604                   $text,
605                   $conf['mailfrom']);
606}
607
608/**
609 * Register a new user
610 *
611 * This registers a new user - Data is read directly from $_POST
612 *
613 * @author  Andreas Gohr <andi@splitbrain.org>
614 *
615 * @return bool  true on success, false on any error
616 */
617function register(){
618  global $lang;
619  global $conf;
620  global $auth;
621
622  if(!$_POST['save']) return false;
623  if(!$auth->canDo('addUser')) return false;
624
625  //clean username
626  $_POST['login'] = preg_replace('/.*:/','',$_POST['login']);
627  $_POST['login'] = cleanID($_POST['login']);
628  //clean fullname and email
629  $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
630  $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
631
632  if( empty($_POST['login']) ||
633      empty($_POST['fullname']) ||
634      empty($_POST['email']) ){
635    msg($lang['regmissing'],-1);
636    return false;
637  }
638
639  if ($conf['autopasswd']) {
640    $pass = auth_pwgen();                // automatically generate password
641  } elseif (empty($_POST['pass']) ||
642            empty($_POST['passchk'])) {
643    msg($lang['regmissing'], -1);        // complain about missing passwords
644    return false;
645  } elseif ($_POST['pass'] != $_POST['passchk']) {
646    msg($lang['regbadpass'], -1);      // complain about misspelled passwords
647    return false;
648  } else {
649    $pass = $_POST['pass'];              // accept checked and valid password
650  }
651
652  //check mail
653  if(!mail_isvalid($_POST['email'])){
654    msg($lang['regbadmail'],-1);
655    return false;
656  }
657
658  //okay try to create the user
659  if(!$auth->triggerUserMod('create', array($_POST['login'],$pass,$_POST['fullname'],$_POST['email']))){
660    msg($lang['reguexists'],-1);
661    return false;
662  }
663
664  // create substitutions for use in notification email
665  $substitutions = array(
666    'NEWUSER' => $_POST['login'],
667    'NEWNAME' => $_POST['fullname'],
668    'NEWEMAIL' => $_POST['email'],
669  );
670
671  if (!$conf['autopasswd']) {
672    msg($lang['regsuccess2'],1);
673    notify('', 'register', '', $_POST['login'], false, $substitutions);
674    return true;
675  }
676
677  // autogenerated password? then send him the password
678  if (auth_sendPassword($_POST['login'],$pass)){
679    msg($lang['regsuccess'],1);
680    notify('', 'register', '', $_POST['login'], false, $substitutions);
681    return true;
682  }else{
683    msg($lang['regmailfail'],-1);
684    return false;
685  }
686}
687
688/**
689 * Update user profile
690 *
691 * @author    Christopher Smith <chris@jalakai.co.uk>
692 */
693function updateprofile() {
694  global $conf;
695  global $INFO;
696  global $lang;
697  global $auth;
698
699  if(empty($_POST['save'])) return false;
700  if(!checkSecurityToken()) return false;
701
702  // should not be able to get here without Profile being possible...
703  if(!$auth->canDo('Profile')) {
704    msg($lang['profna'],-1);
705    return false;
706  }
707
708  if ($_POST['newpass'] != $_POST['passchk']) {
709    msg($lang['regbadpass'], -1);      // complain about misspelled passwords
710    return false;
711  }
712
713  //clean fullname and email
714  $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
715  $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
716
717  if (empty($_POST['fullname']) || empty($_POST['email'])) {
718    msg($lang['profnoempty'],-1);
719    return false;
720  }
721
722  if (!mail_isvalid($_POST['email'])){
723    msg($lang['regbadmail'],-1);
724    return false;
725  }
726
727  if ($_POST['fullname'] != $INFO['userinfo']['name'] && $auth->canDo('modName')) $changes['name'] = $_POST['fullname'];
728  if ($_POST['email'] != $INFO['userinfo']['mail'] && $auth->canDo('modMail')) $changes['mail'] = $_POST['email'];
729  if (!empty($_POST['newpass']) && $auth->canDo('modPass')) $changes['pass'] = $_POST['newpass'];
730
731
732  if (!count($changes)) {
733    msg($lang['profnochange'], -1);
734    return false;
735  }
736
737  if ($conf['profileconfirm']) {
738    if (!$auth->checkPass($_SERVER['REMOTE_USER'], $_POST['oldpass'])) {
739      msg($lang['badlogin'],-1);
740      return false;
741    }
742  }
743
744  if ($result = $auth->triggerUserMod('modify', array($_SERVER['REMOTE_USER'], $changes))) {
745    // update cookie and session with the changed data
746    $cookie = base64_decode($_COOKIE[DOKU_COOKIE]);
747    list($user,$sticky,$pass) = split('\|',$cookie,3);
748    if ($changes['pass']) $pass = PMA_blowfish_encrypt($changes['pass'],auth_cookiesalt());
749
750    auth_setCookie($_SERVER['REMOTE_USER'],$pass,(bool)$sticky);
751    return true;
752  }
753}
754
755/**
756 * Send a  new password
757 *
758 * This function handles both phases of the password reset:
759 *
760 *   - handling the first request of password reset
761 *   - validating the password reset auth token
762 *
763 * @author Benoit Chesneau <benoit@bchesneau.info>
764 * @author Chris Smith <chris@jalakai.co.uk>
765 * @author Andreas Gohr <andi@splitbrain.org>
766 *
767 * @return bool true on success, false on any error
768*/
769function act_resendpwd(){
770    global $lang;
771    global $conf;
772    global $auth;
773
774    if(!actionOK('resendpwd')) return false;
775
776    // should not be able to get here without modPass being possible...
777    if(!$auth->canDo('modPass')) {
778        msg($lang['resendna'],-1);
779        return false;
780    }
781
782    $token = preg_replace('/[^a-f0-9]+/','',$_REQUEST['pwauth']);
783
784    if($token){
785        // we're in token phase
786
787        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
788        if(!@file_exists($tfile)){
789            msg($lang['resendpwdbadauth'],-1);
790            return false;
791        }
792        $user = io_readfile($tfile);
793        @unlink($tfile);
794        $userinfo = $auth->getUserData($user);
795        if(!$userinfo['mail']) {
796            msg($lang['resendpwdnouser'], -1);
797            return false;
798        }
799
800        $pass = auth_pwgen();
801        if (!$auth->triggerUserMod('modify', array($user,array('pass' => $pass)))) {
802            msg('error modifying user data',-1);
803            return false;
804        }
805
806        if (auth_sendPassword($user,$pass)) {
807            msg($lang['resendpwdsuccess'],1);
808        } else {
809            msg($lang['regmailfail'],-1);
810        }
811        return true;
812
813    } else {
814        // we're in request phase
815
816        if(!$_POST['save']) return false;
817
818        if (empty($_POST['login'])) {
819            msg($lang['resendpwdmissing'], -1);
820            return false;
821        } else {
822            $_POST['login'] = preg_replace('/.*:/','',$_POST['login']);
823            $user = cleanID($_POST['login']);
824        }
825
826        $userinfo = $auth->getUserData($user);
827        if(!$userinfo['mail']) {
828            msg($lang['resendpwdnouser'], -1);
829            return false;
830        }
831
832        // generate auth token
833        $token = md5(auth_cookiesalt().$user); //secret but user based
834        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
835        $url = wl('',array('do'=>'resendpwd','pwauth'=>$token),true,'&');
836
837        io_saveFile($tfile,$user);
838
839        $text = rawLocale('pwconfirm');
840        $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
841        $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
842        $text = str_replace('@LOGIN@',$user,$text);
843        $text = str_replace('@TITLE@',$conf['title'],$text);
844        $text = str_replace('@CONFIRM@',$url,$text);
845
846        if(mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
847                     $lang['regpwmail'],
848                     $text,
849                     $conf['mailfrom'])){
850            msg($lang['resendpwdconfirm'],1);
851        }else{
852            msg($lang['regmailfail'],-1);
853        }
854        return true;
855    }
856
857    return false; // never reached
858}
859
860/**
861 * Encrypts a password using the given method and salt
862 *
863 * If the selected method needs a salt and none was given, a random one
864 * is chosen.
865 *
866 * The following methods are understood:
867 *
868 *   smd5  - Salted MD5 hashing
869 *   apr1  - Apache salted MD5 hashing
870 *   md5   - Simple MD5 hashing
871 *   sha1  - SHA1 hashing
872 *   ssha  - Salted SHA1 hashing
873 *   crypt - Unix crypt
874 *   mysql - MySQL password (old method)
875 *   my411 - MySQL 4.1.1 password
876 *
877 * @author  Andreas Gohr <andi@splitbrain.org>
878 * @return  string  The crypted password
879 */
880function auth_cryptPassword($clear,$method='',$salt=null){
881    global $conf;
882    if(empty($method)) $method = $conf['passcrypt'];
883
884    //prepare a salt
885    if(is_null($salt)) $salt = md5(uniqid(rand(), true));
886
887    switch(strtolower($method)){
888        case 'smd5':
889            if(defined('CRYPT_MD5') && CRYPT_MD5) return crypt($clear,'$1$'.substr($salt,0,8).'$');
890            // when crypt can't handle SMD5, falls through to pure PHP implementation
891            $magic = '1';
892        case 'apr1':
893            //from http://de.php.net/manual/en/function.crypt.php#73619 comment by <mikey_nich at hotmail dot com>
894            if(!$magic) $magic = 'apr1';
895            $salt = substr($salt,0,8);
896            $len = strlen($clear);
897            $text = $clear.'$'.$magic.'$'.$salt;
898            $bin = pack("H32", md5($clear.$salt.$clear));
899            for($i = $len; $i > 0; $i -= 16) { $text .= substr($bin, 0, min(16, $i)); }
900            for($i = $len; $i > 0; $i >>= 1) { $text .= ($i & 1) ? chr(0) : $clear{0}; }
901            $bin = pack("H32", md5($text));
902            for($i = 0; $i < 1000; $i++) {
903                $new = ($i & 1) ? $clear : $bin;
904                if ($i % 3) $new .= $salt;
905                if ($i % 7) $new .= $clear;
906                $new .= ($i & 1) ? $bin : $clear;
907                $bin = pack("H32", md5($new));
908            }
909            $tmp = '';
910            for ($i = 0; $i < 5; $i++) {
911                $k = $i + 6;
912                $j = $i + 12;
913                if ($j == 16) $j = 5;
914                $tmp = $bin[$i].$bin[$k].$bin[$j].$tmp;
915            }
916            $tmp = chr(0).chr(0).$bin[11].$tmp;
917            $tmp = strtr(strrev(substr(base64_encode($tmp), 2)),
918                    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
919                    "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
920            return '$'.$magic.'$'.$salt.'$'.$tmp;
921        case 'md5':
922            return md5($clear);
923        case 'sha1':
924            return sha1($clear);
925        case 'ssha':
926            $salt=substr($salt,0,4);
927            return '{SSHA}'.base64_encode(pack("H*", sha1($clear.$salt)).$salt);
928        case 'crypt':
929            return crypt($clear,substr($salt,0,2));
930        case 'mysql':
931            //from http://www.php.net/mysql comment by <soren at byu dot edu>
932            $nr=0x50305735;
933            $nr2=0x12345671;
934            $add=7;
935            $charArr = preg_split("//", $clear);
936            foreach ($charArr as $char) {
937                if (($char == '') || ($char == ' ') || ($char == '\t')) continue;
938                $charVal = ord($char);
939                $nr ^= ((($nr & 63) + $add) * $charVal) + ($nr << 8);
940                $nr2 += ($nr2 << 8) ^ $nr;
941                $add += $charVal;
942            }
943            return sprintf("%08x%08x", ($nr & 0x7fffffff), ($nr2 & 0x7fffffff));
944        case 'my411':
945            return '*'.sha1(pack("H*", sha1($clear)));
946        default:
947            msg("Unsupported crypt method $method",-1);
948    }
949}
950
951/**
952 * Verifies a cleartext password against a crypted hash
953 *
954 * The method and salt used for the crypted hash is determined automatically
955 * then the clear text password is crypted using the same method. If both hashs
956 * match true is is returned else false
957 *
958 * @author  Andreas Gohr <andi@splitbrain.org>
959 * @return  bool
960 */
961function auth_verifyPassword($clear,$crypt){
962    $method='';
963    $salt='';
964
965    //determine the used method and salt
966    $len = strlen($crypt);
967    if(preg_match('/^\$1\$([^\$]{0,8})\$/',$crypt,$m)){
968        $method = 'smd5';
969        $salt   = $m[1];
970    }elseif(preg_match('/^\$apr1\$([^\$]{0,8})\$/',$crypt,$m)){
971        $method = 'apr1';
972        $salt   = $m[1];
973    }elseif(substr($crypt,0,6) == '{SSHA}'){
974        $method = 'ssha';
975        $salt   = substr(base64_decode(substr($crypt, 6)),20);
976    }elseif($len == 32){
977        $method = 'md5';
978    }elseif($len == 40){
979        $method = 'sha1';
980    }elseif($len == 16){
981        $method = 'mysql';
982    }elseif($len == 41 && $crypt[0] == '*'){
983        $method = 'my411';
984    }else{
985        $method = 'crypt';
986        $salt   = substr($crypt,0,2);
987    }
988
989    //crypt and compare
990    if(auth_cryptPassword($clear,$method,$salt) === $crypt){
991        return true;
992    }
993    return false;
994}
995
996/**
997 * Set the authentication cookie and add user identification data to the session
998 *
999 * @param string  $user       username
1000 * @param string  $pass       encrypted password
1001 * @param bool    $sticky     whether or not the cookie will last beyond the session
1002 */
1003function auth_setCookie($user,$pass,$sticky) {
1004    global $conf;
1005    global $auth;
1006    global $USERINFO;
1007
1008      $USERINFO = $auth->getUserData($user);
1009
1010      // set cookie
1011      $cookie = base64_encode("$user|$sticky|$pass");
1012      if($sticky) $time = time()+60*60*24*365; //one year
1013      if (version_compare(PHP_VERSION, '5.2.0', '>')) {
1014          setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
1015      }else{
1016          setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
1017      }
1018      // set session
1019      $_SESSION[DOKU_COOKIE]['auth']['user'] = $user;
1020      $_SESSION[DOKU_COOKIE]['auth']['pass'] = $pass;
1021      $_SESSION[DOKU_COOKIE]['auth']['buid'] = auth_browseruid();
1022      $_SESSION[DOKU_COOKIE]['auth']['info'] = $USERINFO;
1023      $_SESSION[DOKU_COOKIE]['auth']['time'] = time();
1024}
1025
1026//Setup VIM: ex: et ts=2 enc=utf-8 :
1027