xref: /dokuwiki/inc/auth.php (revision 0e115661192c6534b69888fbf70096f5ec6d7fa9) 
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        auth_login($_REQUEST['u'],$_REQUEST['p'],$_REQUEST['r'],$_REQUEST['http_credentials']);
85      }
86    }
87
88    //load ACL into a global array
89    global $AUTH_ACL;
90    if(is_readable(DOKU_CONF.'acl.auth.php')){
91      $AUTH_ACL = file(DOKU_CONF.'acl.auth.php');
92      if(isset($_SERVER['REMOTE_USER'])){
93        $AUTH_ACL = str_replace('%USER%',$_SERVER['REMOTE_USER'],$AUTH_ACL);
94        $AUTH_ACL = str_replace('@USER@',$_SERVER['REMOTE_USER'],$AUTH_ACL); //legacy
95      }
96    }else{
97      $AUTH_ACL = array();
98    }
99  }
100
101/**
102 * This tries to login the user based on the sent auth credentials
103 *
104 * The authentication works like this: if a username was given
105 * a new login is assumed and user/password are checked. If they
106 * are correct the password is encrypted with blowfish and stored
107 * together with the username in a cookie - the same info is stored
108 * in the session, too. Additonally a browserID is stored in the
109 * session.
110 *
111 * If no username was given the cookie is checked: if the username,
112 * crypted password and browserID match between session and cookie
113 * no further testing is done and the user is accepted
114 *
115 * If a cookie was found but no session info was availabe the
116 * blowfish encrypted password from the cookie is decrypted and
117 * together with username rechecked by calling this function again.
118 *
119 * On a successful login $_SERVER[REMOTE_USER] and $USERINFO
120 * are set.
121 *
122 * @author  Andreas Gohr <andi@splitbrain.org>
123 *
124 * @param   string  $user    Username
125 * @param   string  $pass    Cleartext Password
126 * @param   bool    $sticky  Cookie should not expire
127 * @param   bool    $silent  Don't show error on bad auth
128 * @return  bool             true on successful auth
129*/
130function auth_login($user,$pass,$sticky=false,$silent=false){
131  global $USERINFO;
132  global $conf;
133  global $lang;
134  global $auth;
135  $sticky ? $sticky = true : $sticky = false; //sanity check
136
137  if(!empty($user)){
138    //usual login
139    if ($auth->checkPass($user,$pass)){
140      // make logininfo globally available
141      $_SERVER['REMOTE_USER'] = $user;
142      auth_setCookie($user,PMA_blowfish_encrypt($pass,auth_cookiesalt()),$sticky);
143      return true;
144    }else{
145      //invalid credentials - log off
146      if(!$silent) msg($lang['badlogin'],-1);
147      auth_logoff();
148      return false;
149    }
150  }else{
151    // read cookie information
152    $cookie = base64_decode($_COOKIE[DOKU_COOKIE]);
153    list($user,$sticky,$pass) = split('\|',$cookie,3);
154    // get session info
155    $session = $_SESSION[DOKU_COOKIE]['auth'];
156    if($user && $pass){
157      // we got a cookie - see if we can trust it
158      if(isset($session) &&
159        $auth->useSessionCache($user) &&
160        ($session['time'] >= time()-$conf['auth_security_timeout']) &&
161        ($session['user'] == $user) &&
162        ($session['pass'] == $pass) &&  //still crypted
163        ($session['buid'] == auth_browseruid()) ){
164        // he has session, cookie and browser right - let him in
165        $_SERVER['REMOTE_USER'] = $user;
166        $USERINFO = $session['info']; //FIXME move all references to session
167        return true;
168      }
169      // no we don't trust it yet - recheck pass but silent
170      $pass = PMA_blowfish_decrypt($pass,auth_cookiesalt());
171      return auth_login($user,$pass,$sticky,true);
172    }
173  }
174  //just to be sure
175  auth_logoff(true);
176  return false;
177}
178
179/**
180 * Checks if a given authentication token was stored in the session
181 *
182 * Will setup authentication data using data from the session if the
183 * token is correct. Will exit with a 401 Status if not.
184 *
185 * @author Andreas Gohr <andi@splitbrain.org>
186 * @param  string $token The authentication token
187 * @return boolean true (or will exit on failure)
188 */
189function auth_validateToken($token){
190    if(!$token || $token != $_SESSION[DOKU_COOKIE]['auth']['token']){
191        // bad token
192        header("HTTP/1.0 401 Unauthorized");
193        print 'Invalid auth token - maybe the session timed out';
194        unset($_SESSION[DOKU_COOKIE]['auth']['token']); // no second chance
195        exit;
196    }
197    // still here? trust the session data
198    global $USERINFO;
199    $_SERVER['REMOTE_USER'] = $_SESSION[DOKU_COOKIE]['auth']['user'];
200    $USERINFO = $_SESSION[DOKU_COOKIE]['auth']['info'];
201    return true;
202}
203
204/**
205 * Create an auth token and store it in the session
206 *
207 * NOTE: this is completely unrelated to the getSecurityToken() function
208 *
209 * @author Andreas Gohr <andi@splitbrain.org>
210 * @return string The auth token
211 */
212function auth_createToken(){
213    $token = md5(mt_rand());
214    @session_start(); // reopen the session if needed
215    $_SESSION[DOKU_COOKIE]['auth']['token'] = $token;
216    session_write_close();
217    return $token;
218}
219
220/**
221 * Builds a pseudo UID from browser and IP data
222 *
223 * This is neither unique nor unfakable - still it adds some
224 * security. Using the first part of the IP makes sure
225 * proxy farms like AOLs are stil okay.
226 *
227 * @author  Andreas Gohr <andi@splitbrain.org>
228 *
229 * @return  string  a MD5 sum of various browser headers
230 */
231function auth_browseruid(){
232  $uid  = '';
233  $uid .= $_SERVER['HTTP_USER_AGENT'];
234  $uid .= $_SERVER['HTTP_ACCEPT_ENCODING'];
235  $uid .= $_SERVER['HTTP_ACCEPT_LANGUAGE'];
236  $uid .= $_SERVER['HTTP_ACCEPT_CHARSET'];
237  $uid .= substr($_SERVER['REMOTE_ADDR'],0,strpos($_SERVER['REMOTE_ADDR'],'.'));
238  return md5($uid);
239}
240
241/**
242 * Creates a random key to encrypt the password in cookies
243 *
244 * This function tries to read the password for encrypting
245 * cookies from $conf['metadir'].'/_htcookiesalt'
246 * if no such file is found a random key is created and
247 * and stored in this file.
248 *
249 * @author  Andreas Gohr <andi@splitbrain.org>
250 *
251 * @return  string
252 */
253function auth_cookiesalt(){
254  global $conf;
255  $file = $conf['metadir'].'/_htcookiesalt';
256  $salt = io_readFile($file);
257  if(empty($salt)){
258    $salt = uniqid(rand(),true);
259    io_saveFile($file,$salt);
260  }
261  return $salt;
262}
263
264/**
265 * Log out the current user
266 *
267 * This clears all authentication data and thus log the user
268 * off. It also clears session data.
269 *
270 * @author  Andreas Gohr <andi@splitbrain.org>
271 * @param bool $keepbc - when true, the breadcrumb data is not cleared
272 */
273function auth_logoff($keepbc=false){
274  global $conf;
275  global $USERINFO;
276  global $INFO, $ID;
277  global $auth;
278
279  // make sure the session is writable (it usually is)
280  @session_start();
281
282  if(isset($_SESSION[DOKU_COOKIE]['auth']['user']))
283    unset($_SESSION[DOKU_COOKIE]['auth']['user']);
284  if(isset($_SESSION[DOKU_COOKIE]['auth']['pass']))
285    unset($_SESSION[DOKU_COOKIE]['auth']['pass']);
286  if(isset($_SESSION[DOKU_COOKIE]['auth']['info']))
287    unset($_SESSION[DOKU_COOKIE]['auth']['info']);
288  if(!$keepbc && isset($_SESSION[DOKU_COOKIE]['bc']))
289    unset($_SESSION[DOKU_COOKIE]['bc']);
290  if(isset($_SERVER['REMOTE_USER']))
291    unset($_SERVER['REMOTE_USER']);
292  $USERINFO=null; //FIXME
293
294  if (version_compare(PHP_VERSION, '5.2.0', '>')) {
295    setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
296  }else{
297    setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
298  }
299
300  if($auth && $auth->canDo('logoff')){
301    $auth->logOff();
302  }
303}
304
305/**
306 * Check if a user is a manager
307 *
308 * Should usually be called without any parameters to check the current
309 * user.
310 *
311 * The info is available through $INFO['ismanager'], too
312 *
313 * @author Andreas Gohr <andi@splitbrain.org>
314 * @see    auth_isadmin
315 * @param  string user      - Username
316 * @param  array  groups    - List of groups the user is in
317 * @param  bool   adminonly - when true checks if user is admin
318 */
319function auth_ismanager($user=null,$groups=null,$adminonly=false){
320  global $conf;
321  global $USERINFO;
322
323  if(!$conf['useacl']) return false;
324  if(is_null($user))   $user   = $_SERVER['REMOTE_USER'];
325  if(is_null($groups)) $groups = (array) $USERINFO['grps'];
326  $user   = auth_nameencode($user);
327
328  // check username against superuser and manager
329  $superusers = explode(',', $conf['superuser']);
330  $superusers = array_unique($superusers);
331  $superusers = array_map('trim', $superusers);
332  // prepare an array containing only true values for array_map call
333  $alltrue = array_fill(0, count($superusers), true);
334  $superusers = array_map('auth_nameencode', $superusers, $alltrue);
335  if(in_array($user, $superusers)) return true;
336
337  if(!$adminonly){
338    $managers = explode(',', $conf['manager']);
339    $managers = array_unique($managers);
340    $managers = array_map('trim', $managers);
341    // prepare an array containing only true values for array_map call
342    $alltrue = array_fill(0, count($managers), true);
343    $managers = array_map('auth_nameencode', $managers, $alltrue);
344    if(in_array($user, $managers)) return true;
345  }
346
347  // check user's groups against superuser and manager
348  if (!empty($groups)) {
349
350    //prepend groups with @ and nameencode
351    $cnt = count($groups);
352    for($i=0; $i<$cnt; $i++){
353      $groups[$i] = '@'.auth_nameencode($groups[$i]);
354    }
355
356    // check groups against superuser and manager
357    foreach($superusers as $supu)
358      if(in_array($supu, $groups)) return true;
359    if(!$adminonly){
360      foreach($managers as $mana)
361        if(in_array($mana, $groups)) return true;
362    }
363  }
364
365  return false;
366}
367
368/**
369 * Check if a user is admin
370 *
371 * Alias to auth_ismanager with adminonly=true
372 *
373 * The info is available through $INFO['isadmin'], too
374 *
375 * @author Andreas Gohr <andi@splitbrain.org>
376 * @see auth_ismanager
377 */
378function auth_isadmin($user=null,$groups=null){
379  return auth_ismanager($user,$groups,true);
380}
381
382/**
383 * Convinience function for auth_aclcheck()
384 *
385 * This checks the permissions for the current user
386 *
387 * @author  Andreas Gohr <andi@splitbrain.org>
388 *
389 * @param  string  $id  page ID
390 * @return int          permission level
391 */
392function auth_quickaclcheck($id){
393  global $conf;
394  global $USERINFO;
395  # if no ACL is used always return upload rights
396  if(!$conf['useacl']) return AUTH_UPLOAD;
397  return auth_aclcheck($id,$_SERVER['REMOTE_USER'],$USERINFO['grps']);
398}
399
400/**
401 * Returns the maximum rights a user has for
402 * the given ID or its namespace
403 *
404 * @author  Andreas Gohr <andi@splitbrain.org>
405 *
406 * @param  string  $id     page ID
407 * @param  string  $user   Username
408 * @param  array   $groups Array of groups the user is in
409 * @return int             permission level
410 */
411function auth_aclcheck($id,$user,$groups){
412  global $conf;
413  global $AUTH_ACL;
414
415  // if no ACL is used always return upload rights
416  if(!$conf['useacl']) return AUTH_UPLOAD;
417
418  //make sure groups is an array
419  if(!is_array($groups)) $groups = array();
420
421  //if user is superuser or in superusergroup return 255 (acl_admin)
422  if(auth_isadmin($user,$groups)) { return AUTH_ADMIN; }
423
424  $user = auth_nameencode($user);
425
426  //prepend groups with @ and nameencode
427  $cnt = count($groups);
428  for($i=0; $i<$cnt; $i++){
429    $groups[$i] = '@'.auth_nameencode($groups[$i]);
430  }
431
432  $ns    = getNS($id);
433  $perm  = -1;
434
435  if($user || count($groups)){
436    //add ALL group
437    $groups[] = '@ALL';
438    //add User
439    if($user) $groups[] = $user;
440    //build regexp
441    $regexp   = join('|',$groups);
442  }else{
443    $regexp = '@ALL';
444  }
445
446  //check exact match first
447  $matches = preg_grep('/^'.preg_quote($id,'/').'\s+('.$regexp.')\s+/',$AUTH_ACL);
448  if(count($matches)){
449    foreach($matches as $match){
450      $match = preg_replace('/#.*$/','',$match); //ignore comments
451      $acl   = preg_split('/\s+/',$match);
452      if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
453      if($acl[2] > $perm){
454        $perm = $acl[2];
455      }
456    }
457    if($perm > -1){
458      //we had a match - return it
459      return $perm;
460    }
461  }
462
463  //still here? do the namespace checks
464  if($ns){
465    $path = $ns.':\*';
466  }else{
467    $path = '\*'; //root document
468  }
469
470  do{
471    $matches = preg_grep('/^'.$path.'\s+('.$regexp.')\s+/',$AUTH_ACL);
472    if(count($matches)){
473      foreach($matches as $match){
474        $match = preg_replace('/#.*$/','',$match); //ignore comments
475        $acl   = preg_split('/\s+/',$match);
476        if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
477        if($acl[2] > $perm){
478          $perm = $acl[2];
479        }
480      }
481      //we had a match - return it
482      return $perm;
483    }
484
485    //get next higher namespace
486    $ns   = getNS($ns);
487
488    if($path != '\*'){
489      $path = $ns.':\*';
490      if($path == ':\*') $path = '\*';
491    }else{
492      //we did this already
493      //looks like there is something wrong with the ACL
494      //break here
495      msg('No ACL setup yet! Denying access to everyone.');
496      return AUTH_NONE;
497    }
498  }while(1); //this should never loop endless
499
500  //still here? return no permissions
501  return AUTH_NONE;
502}
503
504/**
505 * Encode ASCII special chars
506 *
507 * Some auth backends allow special chars in their user and groupnames
508 * The special chars are encoded with this function. Only ASCII chars
509 * are encoded UTF-8 multibyte are left as is (different from usual
510 * urlencoding!).
511 *
512 * Decoding can be done with rawurldecode
513 *
514 * @author Andreas Gohr <gohr@cosmocode.de>
515 * @see rawurldecode()
516 */
517function auth_nameencode($name,$skip_group=false){
518  global $cache_authname;
519  $cache =& $cache_authname;
520  $name  = (string) $name;
521
522  if (!isset($cache[$name][$skip_group])) {
523    if($skip_group && $name{0} =='@'){
524      $cache[$name][$skip_group] = '@'.preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
525                                                    "'%'.dechex(ord(substr('\\1',-1)))",substr($name,1));
526    }else{
527      $cache[$name][$skip_group] = preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
528                                                "'%'.dechex(ord(substr('\\1',-1)))",$name);
529    }
530  }
531
532  return $cache[$name][$skip_group];
533}
534
535/**
536 * Create a pronouncable password
537 *
538 * @author  Andreas Gohr <andi@splitbrain.org>
539 * @link    http://www.phpbuilder.com/annotate/message.php3?id=1014451
540 *
541 * @return string  pronouncable password
542 */
543function auth_pwgen(){
544  $pw = '';
545  $c  = 'bcdfghjklmnprstvwz'; //consonants except hard to speak ones
546  $v  = 'aeiou';              //vowels
547  $a  = $c.$v;                //both
548
549  //use two syllables...
550  for($i=0;$i < 2; $i++){
551    $pw .= $c[rand(0, strlen($c)-1)];
552    $pw .= $v[rand(0, strlen($v)-1)];
553    $pw .= $a[rand(0, strlen($a)-1)];
554  }
555  //... and add a nice number
556  $pw .= rand(10,99);
557
558  return $pw;
559}
560
561/**
562 * Sends a password to the given user
563 *
564 * @author  Andreas Gohr <andi@splitbrain.org>
565 *
566 * @return bool  true on success
567 */
568function auth_sendPassword($user,$password){
569  global $conf;
570  global $lang;
571  global $auth;
572
573  $hdrs  = '';
574  $userinfo = $auth->getUserData($user);
575
576  if(!$userinfo['mail']) return false;
577
578  $text = rawLocale('password');
579  $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
580  $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
581  $text = str_replace('@LOGIN@',$user,$text);
582  $text = str_replace('@PASSWORD@',$password,$text);
583  $text = str_replace('@TITLE@',$conf['title'],$text);
584
585  return mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
586                   $lang['regpwmail'],
587                   $text,
588                   $conf['mailfrom']);
589}
590
591/**
592 * Register a new user
593 *
594 * This registers a new user - Data is read directly from $_POST
595 *
596 * @author  Andreas Gohr <andi@splitbrain.org>
597 *
598 * @return bool  true on success, false on any error
599 */
600function register(){
601  global $lang;
602  global $conf;
603  global $auth;
604
605  if(!$_POST['save']) return false;
606  if(!$auth->canDo('addUser')) return false;
607
608  //clean username
609  $_POST['login'] = preg_replace('/.*:/','',$_POST['login']);
610  $_POST['login'] = cleanID($_POST['login']);
611  //clean fullname and email
612  $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
613  $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
614
615  if( empty($_POST['login']) ||
616      empty($_POST['fullname']) ||
617      empty($_POST['email']) ){
618    msg($lang['regmissing'],-1);
619    return false;
620  }
621
622  if ($conf['autopasswd']) {
623    $pass = auth_pwgen();                // automatically generate password
624  } elseif (empty($_POST['pass']) ||
625            empty($_POST['passchk'])) {
626    msg($lang['regmissing'], -1);        // complain about missing passwords
627    return false;
628  } elseif ($_POST['pass'] != $_POST['passchk']) {
629    msg($lang['regbadpass'], -1);      // complain about misspelled passwords
630    return false;
631  } else {
632    $pass = $_POST['pass'];              // accept checked and valid password
633  }
634
635  //check mail
636  if(!mail_isvalid($_POST['email'])){
637    msg($lang['regbadmail'],-1);
638    return false;
639  }
640
641  //okay try to create the user
642  if(!$auth->triggerUserMod('create', array($_POST['login'],$pass,$_POST['fullname'],$_POST['email']))){
643    msg($lang['reguexists'],-1);
644    return false;
645  }
646
647  // create substitutions for use in notification email
648  $substitutions = array(
649    'NEWUSER' => $_POST['login'],
650    'NEWNAME' => $_POST['fullname'],
651    'NEWEMAIL' => $_POST['email'],
652  );
653
654  if (!$conf['autopasswd']) {
655    msg($lang['regsuccess2'],1);
656    notify('', 'register', '', $_POST['login'], false, $substitutions);
657    return true;
658  }
659
660  // autogenerated password? then send him the password
661  if (auth_sendPassword($_POST['login'],$pass)){
662    msg($lang['regsuccess'],1);
663    notify('', 'register', '', $_POST['login'], false, $substitutions);
664    return true;
665  }else{
666    msg($lang['regmailfail'],-1);
667    return false;
668  }
669}
670
671/**
672 * Update user profile
673 *
674 * @author    Christopher Smith <chris@jalakai.co.uk>
675 */
676function updateprofile() {
677  global $conf;
678  global $INFO;
679  global $lang;
680  global $auth;
681
682  if(empty($_POST['save'])) return false;
683  if(!checkSecurityToken()) return false;
684
685  // should not be able to get here without Profile being possible...
686  if(!$auth->canDo('Profile')) {
687    msg($lang['profna'],-1);
688    return false;
689  }
690
691  if ($_POST['newpass'] != $_POST['passchk']) {
692    msg($lang['regbadpass'], -1);      // complain about misspelled passwords
693    return false;
694  }
695
696  //clean fullname and email
697  $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
698  $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
699
700  if (empty($_POST['fullname']) || empty($_POST['email'])) {
701    msg($lang['profnoempty'],-1);
702    return false;
703  }
704
705  if (!mail_isvalid($_POST['email'])){
706    msg($lang['regbadmail'],-1);
707    return false;
708  }
709
710  if ($_POST['fullname'] != $INFO['userinfo']['name'] && $auth->canDo('modName')) $changes['name'] = $_POST['fullname'];
711  if ($_POST['email'] != $INFO['userinfo']['mail'] && $auth->canDo('modMail')) $changes['mail'] = $_POST['email'];
712  if (!empty($_POST['newpass']) && $auth->canDo('modPass')) $changes['pass'] = $_POST['newpass'];
713
714
715  if (!count($changes)) {
716    msg($lang['profnochange'], -1);
717    return false;
718  }
719
720  if ($conf['profileconfirm']) {
721    if (!$auth->checkPass($_SERVER['REMOTE_USER'], $_POST['oldpass'])) {
722      msg($lang['badlogin'],-1);
723      return false;
724    }
725  }
726
727  if ($result = $auth->triggerUserMod('modify', array($_SERVER['REMOTE_USER'], $changes))) {
728    // update cookie and session with the changed data
729    $cookie = base64_decode($_COOKIE[DOKU_COOKIE]);
730    list($user,$sticky,$pass) = split('\|',$cookie,3);
731    if ($changes['pass']) $pass = PMA_blowfish_encrypt($changes['pass'],auth_cookiesalt());
732
733    auth_setCookie($_SERVER['REMOTE_USER'],$pass,(bool)$sticky);
734    return true;
735  }
736}
737
738/**
739 * Send a  new password
740 *
741 * This function handles both phases of the password reset:
742 *
743 *   - handling the first request of password reset
744 *   - validating the password reset auth token
745 *
746 * @author Benoit Chesneau <benoit@bchesneau.info>
747 * @author Chris Smith <chris@jalakai.co.uk>
748 * @author Andreas Gohr <andi@splitbrain.org>
749 *
750 * @return bool true on success, false on any error
751*/
752function act_resendpwd(){
753    global $lang;
754    global $conf;
755    global $auth;
756
757    if(!actionOK('resendpwd')) return false;
758
759    // should not be able to get here without modPass being possible...
760    if(!$auth->canDo('modPass')) {
761        msg($lang['resendna'],-1);
762        return false;
763    }
764
765    $token = preg_replace('/[^a-f0-9]+/','',$_REQUEST['pwauth']);
766
767    if($token){
768        // we're in token phase
769
770        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
771        if(!@file_exists($tfile)){
772            msg($lang['resendpwdbadauth'],-1);
773            return false;
774        }
775        $user = io_readfile($tfile);
776        @unlink($tfile);
777        $userinfo = $auth->getUserData($user);
778        if(!$userinfo['mail']) {
779            msg($lang['resendpwdnouser'], -1);
780            return false;
781        }
782
783        $pass = auth_pwgen();
784        if (!$auth->triggerUserMod('modify', array($user,array('pass' => $pass)))) {
785            msg('error modifying user data',-1);
786            return false;
787        }
788
789        if (auth_sendPassword($user,$pass)) {
790            msg($lang['resendpwdsuccess'],1);
791        } else {
792            msg($lang['regmailfail'],-1);
793        }
794        return true;
795
796    } else {
797        // we're in request phase
798
799        if(!$_POST['save']) return false;
800
801        if (empty($_POST['login'])) {
802            msg($lang['resendpwdmissing'], -1);
803            return false;
804        } else {
805            $_POST['login'] = preg_replace('/.*:/','',$_POST['login']);
806            $user = cleanID($_POST['login']);
807        }
808
809        $userinfo = $auth->getUserData($user);
810        if(!$userinfo['mail']) {
811            msg($lang['resendpwdnouser'], -1);
812            return false;
813        }
814
815        // generate auth token
816        $token = md5(auth_cookiesalt().$user); //secret but user based
817        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
818        $url = wl('',array('do'=>'resendpwd','pwauth'=>$token),true,'&');
819
820        io_saveFile($tfile,$user);
821
822        $text = rawLocale('pwconfirm');
823        $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
824        $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
825        $text = str_replace('@LOGIN@',$user,$text);
826        $text = str_replace('@TITLE@',$conf['title'],$text);
827        $text = str_replace('@CONFIRM@',$url,$text);
828
829        if(mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
830                     $lang['regpwmail'],
831                     $text,
832                     $conf['mailfrom'])){
833            msg($lang['resendpwdconfirm'],1);
834        }else{
835            msg($lang['regmailfail'],-1);
836        }
837        return true;
838    }
839
840    return false; // never reached
841}
842
843/**
844 * Encrypts a password using the given method and salt
845 *
846 * If the selected method needs a salt and none was given, a random one
847 * is chosen.
848 *
849 * The following methods are understood:
850 *
851 *   smd5  - Salted MD5 hashing
852 *   apr1  - Apache salted MD5 hashing
853 *   md5   - Simple MD5 hashing
854 *   sha1  - SHA1 hashing
855 *   ssha  - Salted SHA1 hashing
856 *   crypt - Unix crypt
857 *   mysql - MySQL password (old method)
858 *   my411 - MySQL 4.1.1 password
859 *
860 * @author  Andreas Gohr <andi@splitbrain.org>
861 * @return  string  The crypted password
862 */
863function auth_cryptPassword($clear,$method='',$salt=null){
864    global $conf;
865    if(empty($method)) $method = $conf['passcrypt'];
866
867    //prepare a salt
868    if(is_null($salt)) $salt = md5(uniqid(rand(), true));
869
870    switch(strtolower($method)){
871        case 'smd5':
872            if(defined('CRYPT_MD5') && CRYPT_MD5) return crypt($clear,'$1$'.substr($salt,0,8).'$');
873            // when crypt can't handle SMD5, falls through to pure PHP implementation
874            $magic = '1';
875        case 'apr1':
876            //from http://de.php.net/manual/en/function.crypt.php#73619 comment by <mikey_nich at hotmail dot com>
877            if(!$magic) $magic = 'apr1';
878            $salt = substr($salt,0,8);
879            $len = strlen($clear);
880            $text = $clear.'$'.$magic.'$'.$salt;
881            $bin = pack("H32", md5($clear.$salt.$clear));
882            for($i = $len; $i > 0; $i -= 16) { $text .= substr($bin, 0, min(16, $i)); }
883            for($i = $len; $i > 0; $i >>= 1) { $text .= ($i & 1) ? chr(0) : $clear{0}; }
884            $bin = pack("H32", md5($text));
885            for($i = 0; $i < 1000; $i++) {
886                $new = ($i & 1) ? $clear : $bin;
887                if ($i % 3) $new .= $salt;
888                if ($i % 7) $new .= $clear;
889                $new .= ($i & 1) ? $bin : $clear;
890                $bin = pack("H32", md5($new));
891            }
892            $tmp = '';
893            for ($i = 0; $i < 5; $i++) {
894                $k = $i + 6;
895                $j = $i + 12;
896                if ($j == 16) $j = 5;
897                $tmp = $bin[$i].$bin[$k].$bin[$j].$tmp;
898            }
899            $tmp = chr(0).chr(0).$bin[11].$tmp;
900            $tmp = strtr(strrev(substr(base64_encode($tmp), 2)),
901                    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
902                    "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
903            return '$'.$magic.'$'.$salt.'$'.$tmp;
904        case 'md5':
905            return md5($clear);
906        case 'sha1':
907            return sha1($clear);
908        case 'ssha':
909            $salt=substr($salt,0,4);
910            return '{SSHA}'.base64_encode(pack("H*", sha1($clear.$salt)).$salt);
911        case 'crypt':
912            return crypt($clear,substr($salt,0,2));
913        case 'mysql':
914            //from http://www.php.net/mysql comment by <soren at byu dot edu>
915            $nr=0x50305735;
916            $nr2=0x12345671;
917            $add=7;
918            $charArr = preg_split("//", $clear);
919            foreach ($charArr as $char) {
920                if (($char == '') || ($char == ' ') || ($char == '\t')) continue;
921                $charVal = ord($char);
922                $nr ^= ((($nr & 63) + $add) * $charVal) + ($nr << 8);
923                $nr2 += ($nr2 << 8) ^ $nr;
924                $add += $charVal;
925            }
926            return sprintf("%08x%08x", ($nr & 0x7fffffff), ($nr2 & 0x7fffffff));
927        case 'my411':
928            return '*'.sha1(pack("H*", sha1($clear)));
929        default:
930            msg("Unsupported crypt method $method",-1);
931    }
932}
933
934/**
935 * Verifies a cleartext password against a crypted hash
936 *
937 * The method and salt used for the crypted hash is determined automatically
938 * then the clear text password is crypted using the same method. If both hashs
939 * match true is is returned else false
940 *
941 * @author  Andreas Gohr <andi@splitbrain.org>
942 * @return  bool
943 */
944function auth_verifyPassword($clear,$crypt){
945    $method='';
946    $salt='';
947
948    //determine the used method and salt
949    $len = strlen($crypt);
950    if(preg_match('/^\$1\$([^\$]{0,8})\$/',$crypt,$m)){
951        $method = 'smd5';
952        $salt   = $m[1];
953    }elseif(preg_match('/^\$apr1\$([^\$]{0,8})\$/',$crypt,$m)){
954        $method = 'apr1';
955        $salt   = $m[1];
956    }elseif(substr($crypt,0,6) == '{SSHA}'){
957        $method = 'ssha';
958        $salt   = substr(base64_decode(substr($crypt, 6)),20);
959    }elseif($len == 32){
960        $method = 'md5';
961    }elseif($len == 40){
962        $method = 'sha1';
963    }elseif($len == 16){
964        $method = 'mysql';
965    }elseif($len == 41 && $crypt[0] == '*'){
966        $method = 'my411';
967    }else{
968        $method = 'crypt';
969        $salt   = substr($crypt,0,2);
970    }
971
972    //crypt and compare
973    if(auth_cryptPassword($clear,$method,$salt) === $crypt){
974        return true;
975    }
976    return false;
977}
978
979/**
980 * Set the authentication cookie and add user identification data to the session
981 *
982 * @param string  $user       username
983 * @param string  $pass       encrypted password
984 * @param bool    $sticky     whether or not the cookie will last beyond the session
985 */
986function auth_setCookie($user,$pass,$sticky) {
987    global $conf;
988    global $auth;
989    global $USERINFO;
990
991      $USERINFO = $auth->getUserData($user);
992
993      // set cookie
994      $cookie = base64_encode("$user|$sticky|$pass");
995      if($sticky) $time = time()+60*60*24*365; //one year
996      if (version_compare(PHP_VERSION, '5.2.0', '>')) {
997          setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
998      }else{
999          setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
1000      }
1001      // set session
1002      $_SESSION[DOKU_COOKIE]['auth']['user'] = $user;
1003      $_SESSION[DOKU_COOKIE]['auth']['pass'] = $pass;
1004      $_SESSION[DOKU_COOKIE]['auth']['buid'] = auth_browseruid();
1005      $_SESSION[DOKU_COOKIE]['auth']['info'] = $USERINFO;
1006      $_SESSION[DOKU_COOKIE]['auth']['time'] = time();
1007}
1008
1009//Setup VIM: ex: et ts=2 enc=utf-8 :
1010