xref: /dokuwiki/inc/auth.php (revision 535bed707571573f6670f91094e3c8eed6d9420c) 
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')) define('DOKU_INC',fullpath(dirname(__FILE__).'/../').'/');
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'])) $_REQUEST['r'] = '';
61
62      // if no credentials were given try to use HTTP auth (for SSO)
63      if(empty($_REQUEST['u']) && empty($_COOKIE[DOKU_COOKIE]) && !empty($_SERVER['PHP_AUTH_USER'])){
64        $_REQUEST['u'] = $_SERVER['PHP_AUTH_USER'];
65        $_REQUEST['p'] = $_SERVER['PHP_AUTH_PW'];
66      }
67
68      if($_REQUEST['authtok']){
69        // when an authentication token is given, trust the session
70        auth_validateToken($_REQUEST['authtok']);
71      }elseif(!is_null($auth) && $auth->canDo('external')){
72        // external trust mechanism in place
73        $auth->trustExternal($_REQUEST['u'],$_REQUEST['p'],$_REQUEST['r']);
74      }else{
75        auth_login($_REQUEST['u'],$_REQUEST['p'],$_REQUEST['r']);
76      }
77    }
78
79    //load ACL into a global array
80    global $AUTH_ACL;
81    if(is_readable(DOKU_CONF.'acl.auth.php')){
82      $AUTH_ACL = file(DOKU_CONF.'acl.auth.php');
83      if(isset($_SERVER['REMOTE_USER'])){
84        $AUTH_ACL = str_replace('@USER@',$_SERVER['REMOTE_USER'],$AUTH_ACL);
85      }
86    }else{
87      $AUTH_ACL = array();
88    }
89  }
90
91/**
92 * This tries to login the user based on the sent auth credentials
93 *
94 * The authentication works like this: if a username was given
95 * a new login is assumed and user/password are checked. If they
96 * are correct the password is encrypted with blowfish and stored
97 * together with the username in a cookie - the same info is stored
98 * in the session, too. Additonally a browserID is stored in the
99 * session.
100 *
101 * If no username was given the cookie is checked: if the username,
102 * crypted password and browserID match between session and cookie
103 * no further testing is done and the user is accepted
104 *
105 * If a cookie was found but no session info was availabe the
106 * blowfish encrypted password from the cookie is decrypted and
107 * together with username rechecked by calling this function again.
108 *
109 * On a successful login $_SERVER[REMOTE_USER] and $USERINFO
110 * are set.
111 *
112 * @author  Andreas Gohr <andi@splitbrain.org>
113 *
114 * @param   string  $user    Username
115 * @param   string  $pass    Cleartext Password
116 * @param   bool    $sticky  Cookie should not expire
117 * @param   bool    $silent  Don't show error on bad auth
118 * @return  bool             true on successful auth
119*/
120function auth_login($user,$pass,$sticky=false,$silent=false){
121  global $USERINFO;
122  global $conf;
123  global $lang;
124  global $auth;
125  $sticky ? $sticky = true : $sticky = false; //sanity check
126
127  if(!empty($user)){
128    //usual login
129    if ($auth->checkPass($user,$pass)){
130      // make logininfo globally available
131      $_SERVER['REMOTE_USER'] = $user;
132      $USERINFO = $auth->getUserData($user);
133
134      // set cookie
135      $pass   = PMA_blowfish_encrypt($pass,auth_cookiesalt());
136      $cookie = base64_encode("$user|$sticky|$pass");
137      if($sticky) $time = time()+60*60*24*365; //one year
138      setcookie(DOKU_COOKIE,$cookie,$time,DOKU_REL);
139
140      // set session
141      $_SESSION[DOKU_COOKIE]['auth']['user'] = $user;
142      $_SESSION[DOKU_COOKIE]['auth']['pass'] = $pass;
143      $_SESSION[DOKU_COOKIE]['auth']['buid'] = auth_browseruid();
144      $_SESSION[DOKU_COOKIE]['auth']['info'] = $USERINFO;
145      $_SESSION[DOKU_COOKIE]['auth']['time'] = time();
146
147      return true;
148    }else{
149      //invalid credentials - log off
150      if(!$silent) msg($lang['badlogin'],-1);
151      auth_logoff();
152      return false;
153    }
154  }else{
155    // read cookie information
156    $cookie = base64_decode($_COOKIE[DOKU_COOKIE]);
157    list($user,$sticky,$pass) = split('\|',$cookie,3);
158    // get session info
159    $session = $_SESSION[DOKU_COOKIE]['auth'];
160    if($user && $pass){
161      // we got a cookie - see if we can trust it
162      if(isset($session) &&
163        $auth->useSessionCache($user) &&
164        ($session['time'] >= time()-$conf['auth_security_timeout']) &&
165        ($session['user'] == $user) &&
166        ($session['pass'] == $pass) &&  //still crypted
167        ($session['buid'] == auth_browseruid()) ){
168        // he has session, cookie and browser right - let him in
169        $_SERVER['REMOTE_USER'] = $user;
170        $USERINFO = $session['info']; //FIXME move all references to session
171        return true;
172      }
173      // no we don't trust it yet - recheck pass but silent
174      $pass = PMA_blowfish_decrypt($pass,auth_cookiesalt());
175      return auth_login($user,$pass,$sticky,true);
176    }
177  }
178  //just to be sure
179  auth_logoff();
180  return false;
181}
182
183/**
184 * Checks if a given authentication token was stored in the session
185 *
186 * Will setup authentication data using data from the session if the
187 * token is correct. Will exit with a 401 Status if not.
188 *
189 * @author Andreas Gohr <andi@splitbrain.org>
190 * @param  string $token The authentication token
191 * @return boolean true (or will exit on failure)
192 */
193function auth_validateToken($token){
194    if(!$token || $token != $_SESSION[DOKU_COOKIE]['auth']['token']){
195        // bad token
196        header("HTTP/1.0 401 Unauthorized");
197        print 'Invalid auth token - maybe the session timed out';
198        unset($_SESSION[DOKU_COOKIE]['auth']['token']); // no second chance
199        exit;
200    }
201    // still here? trust the session data
202    global $USERINFO;
203    $_SERVER['REMOTE_USER'] = $_SESSION[DOKU_COOKIE]['auth']['user'];
204    $USERINFO = $_SESSION[DOKU_COOKIE]['auth']['info'];
205    return true;
206}
207
208/**
209 * Create an auth token and store it in the session
210 *
211 * NOTE: this is completely unrelated to the getSecurityToken() function
212 *
213 * @author Andreas Gohr <andi@splitbrain.org>
214 * @return string The auth token
215 */
216function auth_createToken(){
217    $token = md5(mt_rand());
218    @session_start(); // reopen the session if needed
219    $_SESSION[DOKU_COOKIE]['auth']['token'] = $token;
220    session_write_close();
221    return $token;
222}
223
224/**
225 * Builds a pseudo UID from browser and IP data
226 *
227 * This is neither unique nor unfakable - still it adds some
228 * security. Using the first part of the IP makes sure
229 * proxy farms like AOLs are stil okay.
230 *
231 * @author  Andreas Gohr <andi@splitbrain.org>
232 *
233 * @return  string  a MD5 sum of various browser headers
234 */
235function auth_browseruid(){
236  $uid  = '';
237  $uid .= $_SERVER['HTTP_USER_AGENT'];
238  $uid .= $_SERVER['HTTP_ACCEPT_ENCODING'];
239  $uid .= $_SERVER['HTTP_ACCEPT_LANGUAGE'];
240  $uid .= $_SERVER['HTTP_ACCEPT_CHARSET'];
241  $uid .= substr($_SERVER['REMOTE_ADDR'],0,strpos($_SERVER['REMOTE_ADDR'],'.'));
242  return md5($uid);
243}
244
245/**
246 * Creates a random key to encrypt the password in cookies
247 *
248 * This function tries to read the password for encrypting
249 * cookies from $conf['metadir'].'/_htcookiesalt'
250 * if no such file is found a random key is created and
251 * and stored in this file.
252 *
253 * @author  Andreas Gohr <andi@splitbrain.org>
254 *
255 * @return  string
256 */
257function auth_cookiesalt(){
258  global $conf;
259  $file = $conf['metadir'].'/_htcookiesalt';
260  $salt = io_readFile($file);
261  if(empty($salt)){
262    $salt = uniqid(rand(),true);
263    io_saveFile($file,$salt);
264  }
265  return $salt;
266}
267
268/**
269 * This clears all authenticationdata and thus log the user
270 * off
271 *
272 * @author  Andreas Gohr <andi@splitbrain.org>
273 */
274function auth_logoff(){
275  global $conf;
276  global $USERINFO;
277  global $INFO, $ID;
278  global $auth;
279
280  if(isset($_SESSION[DOKU_COOKIE]['auth']['user']))
281    unset($_SESSION[DOKU_COOKIE]['auth']['user']);
282  if(isset($_SESSION[DOKU_COOKIE]['auth']['pass']))
283    unset($_SESSION[DOKU_COOKIE]['auth']['pass']);
284  if(isset($_SESSION[DOKU_COOKIE]['auth']['info']))
285    unset($_SESSION[DOKU_COOKIE]['auth']['info']);
286  if(isset($_SERVER['REMOTE_USER']))
287    unset($_SERVER['REMOTE_USER']);
288  $USERINFO=null; //FIXME
289  setcookie(DOKU_COOKIE,'',time()-600000,DOKU_REL);
290
291  if($auth && $auth->canDo('logoff')){
292    $auth->logOff();
293  }
294}
295
296/**
297 * Check if a user is a manager
298 *
299 * Should usually be called without any parameters to check the current
300 * user.
301 *
302 * The info is available through $INFO['ismanager'], too
303 *
304 * @author Andreas Gohr <andi@splitbrain.org>
305 * @see    auth_isadmin
306 * @param  string user      - Username
307 * @param  array  groups    - List of groups the user is in
308 * @param  bool   adminonly - when true checks if user is admin
309 */
310function auth_ismanager($user=null,$groups=null,$adminonly=false){
311  global $conf;
312  global $USERINFO;
313
314  if(!$conf['useacl']) return false;
315  if(is_null($user))   $user   = $_SERVER['REMOTE_USER'];
316  if(is_null($groups)) $groups = (array) $USERINFO['grps'];
317  $user   = auth_nameencode($user);
318
319  // check username against superuser and manager
320  $superusers = explode(',', $conf['superuser']);
321  $superusers = array_unique($superusers);
322  $superusers = array_map('trim', $superusers);
323  // prepare an array containing only true values for array_map call
324  $alltrue = array_fill(0, count($superusers), true);
325  $superusers = array_map('auth_nameencode', $superusers, $alltrue);
326  if(in_array($user, $superusers)) return true;
327
328  if(!$adminonly){
329    $managers = explode(',', $conf['manager']);
330    $managers = array_unique($managers);
331    $managers = array_map('trim', $managers);
332    // prepare an array containing only true values for array_map call
333    $alltrue = array_fill(0, count($managers), true);
334    $managers = array_map('auth_nameencode', $managers, $alltrue);
335    if(in_array($user, $managers)) return true;
336  }
337
338  // check user's groups against superuser and manager
339  if (!empty($groups)) {
340
341    //prepend groups with @ and nameencode
342    $cnt = count($groups);
343    for($i=0; $i<$cnt; $i++){
344      $groups[$i] = '@'.auth_nameencode($groups[$i]);
345    }
346
347    // check groups against superuser and manager
348    foreach($superusers as $supu)
349      if(in_array($supu, $groups)) return true;
350    if(!$adminonly){
351      foreach($managers as $mana)
352        if(in_array($mana, $groups)) return true;
353    }
354  }
355
356  return false;
357}
358
359/**
360 * Check if a user is admin
361 *
362 * Alias to auth_ismanager with adminonly=true
363 *
364 * The info is available through $INFO['isadmin'], too
365 *
366 * @author Andreas Gohr <andi@splitbrain.org>
367 * @see auth_ismanager
368 */
369function auth_isadmin($user=null,$groups=null){
370  return auth_ismanager($user,$groups,true);
371}
372
373/**
374 * Convinience function for auth_aclcheck()
375 *
376 * This checks the permissions for the current user
377 *
378 * @author  Andreas Gohr <andi@splitbrain.org>
379 *
380 * @param  string  $id  page ID
381 * @return int          permission level
382 */
383function auth_quickaclcheck($id){
384  global $conf;
385  global $USERINFO;
386  # if no ACL is used always return upload rights
387  if(!$conf['useacl']) return AUTH_UPLOAD;
388  return auth_aclcheck($id,$_SERVER['REMOTE_USER'],$USERINFO['grps']);
389}
390
391/**
392 * Returns the maximum rights a user has for
393 * the given ID or its namespace
394 *
395 * @author  Andreas Gohr <andi@splitbrain.org>
396 *
397 * @param  string  $id     page ID
398 * @param  string  $user   Username
399 * @param  array   $groups Array of groups the user is in
400 * @return int             permission level
401 */
402function auth_aclcheck($id,$user,$groups){
403  global $conf;
404  global $AUTH_ACL;
405
406  // if no ACL is used always return upload rights
407  if(!$conf['useacl']) return AUTH_UPLOAD;
408
409  //make sure groups is an array
410  if(!is_array($groups)) $groups = array();
411
412  //if user is superuser or in superusergroup return 255 (acl_admin)
413  if(auth_isadmin($user,$groups)) { return AUTH_ADMIN; }
414
415  $user = auth_nameencode($user);
416
417  //prepend groups with @ and nameencode
418  $cnt = count($groups);
419  for($i=0; $i<$cnt; $i++){
420    $groups[$i] = '@'.auth_nameencode($groups[$i]);
421  }
422
423  $ns    = getNS($id);
424  $perm  = -1;
425
426  if($user || count($groups)){
427    //add ALL group
428    $groups[] = '@ALL';
429    //add User
430    if($user) $groups[] = $user;
431    //build regexp
432    $regexp   = join('|',$groups);
433  }else{
434    $regexp = '@ALL';
435  }
436
437  //check exact match first
438  $matches = preg_grep('/^'.preg_quote($id,'/').'\s+('.$regexp.')\s+/',$AUTH_ACL);
439  if(count($matches)){
440    foreach($matches as $match){
441      $match = preg_replace('/#.*$/','',$match); //ignore comments
442      $acl   = preg_split('/\s+/',$match);
443      if($acl[2] > AUTH_DELETE) $acl[2] = AUTH_DELETE; //no admins in the ACL!
444      if($acl[2] > $perm){
445        $perm = $acl[2];
446      }
447    }
448    if($perm > -1){
449      //we had a match - return it
450      return $perm;
451    }
452  }
453
454  //still here? do the namespace checks
455  if($ns){
456    $path = $ns.':\*';
457  }else{
458    $path = '\*'; //root document
459  }
460
461  do{
462    $matches = preg_grep('/^'.$path.'\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      //we had a match - return it
473      return $perm;
474    }
475
476    //get next higher namespace
477    $ns   = getNS($ns);
478
479    if($path != '\*'){
480      $path = $ns.':\*';
481      if($path == ':\*') $path = '\*';
482    }else{
483      //we did this already
484      //looks like there is something wrong with the ACL
485      //break here
486      msg('No ACL setup yet! Denying access to everyone.');
487      return AUTH_NONE;
488    }
489  }while(1); //this should never loop endless
490
491  //still here? return no permissions
492  return AUTH_NONE;
493}
494
495/**
496 * Encode ASCII special chars
497 *
498 * Some auth backends allow special chars in their user and groupnames
499 * The special chars are encoded with this function. Only ASCII chars
500 * are encoded UTF-8 multibyte are left as is (different from usual
501 * urlencoding!).
502 *
503 * Decoding can be done with rawurldecode
504 *
505 * @author Andreas Gohr <gohr@cosmocode.de>
506 * @see rawurldecode()
507 */
508function auth_nameencode($name,$skip_group=false){
509  global $cache_authname;
510  $cache =& $cache_authname;
511  $name  = (string) $name;
512
513  if (!isset($cache[$name][$skip_group])) {
514    if($skip_group && $name{0} =='@'){
515      $cache[$name][$skip_group] = '@'.preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
516                                                    "'%'.dechex(ord(substr('\\1',-1)))",substr($name,1));
517    }else{
518      $cache[$name][$skip_group] = preg_replace('/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f])/e',
519                                                "'%'.dechex(ord(substr('\\1',-1)))",$name);
520    }
521  }
522
523  return $cache[$name][$skip_group];
524}
525
526/**
527 * Create a pronouncable password
528 *
529 * @author  Andreas Gohr <andi@splitbrain.org>
530 * @link    http://www.phpbuilder.com/annotate/message.php3?id=1014451
531 *
532 * @return string  pronouncable password
533 */
534function auth_pwgen(){
535  $pw = '';
536  $c  = 'bcdfghjklmnprstvwz'; //consonants except hard to speak ones
537  $v  = 'aeiou';              //vowels
538  $a  = $c.$v;                //both
539
540  //use two syllables...
541  for($i=0;$i < 2; $i++){
542    $pw .= $c[rand(0, strlen($c)-1)];
543    $pw .= $v[rand(0, strlen($v)-1)];
544    $pw .= $a[rand(0, strlen($a)-1)];
545  }
546  //... and add a nice number
547  $pw .= rand(10,99);
548
549  return $pw;
550}
551
552/**
553 * Sends a password to the given user
554 *
555 * @author  Andreas Gohr <andi@splitbrain.org>
556 *
557 * @return bool  true on success
558 */
559function auth_sendPassword($user,$password){
560  global $conf;
561  global $lang;
562  global $auth;
563
564  $hdrs  = '';
565  $userinfo = $auth->getUserData($user);
566
567  if(!$userinfo['mail']) return false;
568
569  $text = rawLocale('password');
570  $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
571  $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
572  $text = str_replace('@LOGIN@',$user,$text);
573  $text = str_replace('@PASSWORD@',$password,$text);
574  $text = str_replace('@TITLE@',$conf['title'],$text);
575
576  return mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
577                   $lang['regpwmail'],
578                   $text,
579                   $conf['mailfrom']);
580}
581
582/**
583 * Register a new user
584 *
585 * This registers a new user - Data is read directly from $_POST
586 *
587 * @author  Andreas Gohr <andi@splitbrain.org>
588 *
589 * @return bool  true on success, false on any error
590 */
591function register(){
592  global $lang;
593  global $conf;
594  global $auth;
595
596  if(!$_POST['save']) return false;
597  if(!$auth->canDo('addUser')) return false;
598
599  //clean username
600  $_POST['login'] = preg_replace('/.*:/','',$_POST['login']);
601  $_POST['login'] = cleanID($_POST['login']);
602  //clean fullname and email
603  $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
604  $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
605
606  if( empty($_POST['login']) ||
607      empty($_POST['fullname']) ||
608      empty($_POST['email']) ){
609    msg($lang['regmissing'],-1);
610    return false;
611  }
612
613  if ($conf['autopasswd']) {
614    $pass = auth_pwgen();                // automatically generate password
615  } elseif (empty($_POST['pass']) ||
616            empty($_POST['passchk'])) {
617    msg($lang['regmissing'], -1);        // complain about missing passwords
618    return false;
619  } elseif ($_POST['pass'] != $_POST['passchk']) {
620    msg($lang['regbadpass'], -1);      // complain about misspelled passwords
621    return false;
622  } else {
623    $pass = $_POST['pass'];              // accept checked and valid password
624  }
625
626  //check mail
627  if(!mail_isvalid($_POST['email'])){
628    msg($lang['regbadmail'],-1);
629    return false;
630  }
631
632  //okay try to create the user
633  if(!$auth->triggerUserMod('create', array($_POST['login'],$pass,$_POST['fullname'],$_POST['email']))){
634    msg($lang['reguexists'],-1);
635    return false;
636  }
637
638  // create substitutions for use in notification email
639  $substitutions = array(
640    'NEWUSER' => $_POST['login'],
641    'NEWNAME' => $_POST['fullname'],
642    'NEWEMAIL' => $_POST['email'],
643  );
644
645  if (!$conf['autopasswd']) {
646    msg($lang['regsuccess2'],1);
647    notify('', 'register', '', $_POST['login'], false, $substitutions);
648    return true;
649  }
650
651  // autogenerated password? then send him the password
652  if (auth_sendPassword($_POST['login'],$pass)){
653    msg($lang['regsuccess'],1);
654    notify('', 'register', '', $_POST['login'], false, $substitutions);
655    return true;
656  }else{
657    msg($lang['regmailfail'],-1);
658    return false;
659  }
660}
661
662/**
663 * Update user profile
664 *
665 * @author    Christopher Smith <chris@jalakai.co.uk>
666 */
667function updateprofile() {
668  global $conf;
669  global $INFO;
670  global $lang;
671  global $auth;
672
673  if(empty($_POST['save'])) return false;
674  if(!checkSecurityToken()) return false;
675
676  // should not be able to get here without Profile being possible...
677  if(!$auth->canDo('Profile')) {
678    msg($lang['profna'],-1);
679    return false;
680  }
681
682  if ($_POST['newpass'] != $_POST['passchk']) {
683    msg($lang['regbadpass'], -1);      // complain about misspelled passwords
684    return false;
685  }
686
687  //clean fullname and email
688  $_POST['fullname'] = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['fullname']));
689  $_POST['email']    = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/','',$_POST['email']));
690
691  if (empty($_POST['fullname']) || empty($_POST['email'])) {
692    msg($lang['profnoempty'],-1);
693    return false;
694  }
695
696  if (!mail_isvalid($_POST['email'])){
697    msg($lang['regbadmail'],-1);
698    return false;
699  }
700
701  if ($_POST['fullname'] != $INFO['userinfo']['name'] && $auth->canDo('modName')) $changes['name'] = $_POST['fullname'];
702  if ($_POST['email'] != $INFO['userinfo']['mail'] && $auth->canDo('modMail')) $changes['mail'] = $_POST['email'];
703  if (!empty($_POST['newpass']) && $auth->canDo('modPass')) $changes['pass'] = $_POST['newpass'];
704
705
706  if (!count($changes)) {
707    msg($lang['profnochange'], -1);
708    return false;
709  }
710
711  if ($conf['profileconfirm']) {
712    if (!$auth->checkPass($_SERVER['REMOTE_USER'], $_POST['oldpass'])) {
713      msg($lang['badlogin'],-1);
714      return false;
715    }
716  }
717
718  return $auth->triggerUserMod('modify', array($_SERVER['REMOTE_USER'], $changes));
719}
720
721/**
722 * Send a  new password
723 *
724 * This function handles both phases of the password reset:
725 *
726 *   - handling the first request of password reset
727 *   - validating the password reset auth token
728 *
729 * @author Benoit Chesneau <benoit@bchesneau.info>
730 * @author Chris Smith <chris@jalakai.co.uk>
731 * @author Andreas Gohr <andi@splitbrain.org>
732 *
733 * @return bool true on success, false on any error
734*/
735function act_resendpwd(){
736    global $lang;
737    global $conf;
738    global $auth;
739
740    if(!actionOK('resendpwd')) return false;
741
742    // should not be able to get here without modPass being possible...
743    if(!$auth->canDo('modPass')) {
744        msg($lang['resendna'],-1);
745        return false;
746    }
747
748    $token = preg_replace('/[^a-f0-9]+/','',$_REQUEST['pwauth']);
749
750    if($token){
751        // we're in token phase
752
753        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
754        if(!@file_exists($tfile)){
755            msg($lang['resendpwdbadauth'],-1);
756            return false;
757        }
758        $user = io_readfile($tfile);
759        @unlink($tfile);
760        $userinfo = $auth->getUserData($user);
761        if(!$userinfo['mail']) {
762            msg($lang['resendpwdnouser'], -1);
763            return false;
764        }
765
766        $pass = auth_pwgen();
767        if (!$auth->triggerUserMod('modify', array($user,array('pass' => $pass)))) {
768            msg('error modifying user data',-1);
769            return false;
770        }
771
772        if (auth_sendPassword($user,$pass)) {
773            msg($lang['resendpwdsuccess'],1);
774        } else {
775            msg($lang['regmailfail'],-1);
776        }
777        return true;
778
779    } else {
780        // we're in request phase
781
782        if(!$_POST['save']) return false;
783
784        if (empty($_POST['login'])) {
785            msg($lang['resendpwdmissing'], -1);
786            return false;
787        } else {
788            $_POST['login'] = preg_replace('/.*:/','',$_POST['login']);
789            $user = cleanID($_POST['login']);
790        }
791
792        $userinfo = $auth->getUserData($user);
793        if(!$userinfo['mail']) {
794            msg($lang['resendpwdnouser'], -1);
795            return false;
796        }
797
798        // generate auth token
799        $token = md5(auth_cookiesalt().$user); //secret but user based
800        $tfile = $conf['cachedir'].'/'.$token{0}.'/'.$token.'.pwauth';
801        $url = wl('',array('do'=>'resendpwd','pwauth'=>$token),true,'&');
802
803        io_saveFile($tfile,$user);
804
805        $text = rawLocale('pwconfirm');
806        $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
807        $text = str_replace('@FULLNAME@',$userinfo['name'],$text);
808        $text = str_replace('@LOGIN@',$user,$text);
809        $text = str_replace('@TITLE@',$conf['title'],$text);
810        $text = str_replace('@CONFIRM@',$url,$text);
811
812        if(mail_send($userinfo['name'].' <'.$userinfo['mail'].'>',
813                     $lang['regpwmail'],
814                     $text,
815                     $conf['mailfrom'])){
816            msg($lang['resendpwdconfirm'],1);
817        }else{
818            msg($lang['regmailfail'],-1);
819        }
820        return true;
821    }
822
823    return false; // never reached
824}
825
826/**
827 * Uses a regular expresion to check if a given mail address is valid
828 *
829 * May not be completly RFC conform!
830 *
831 * @link    http://www.webmasterworld.com/forum88/135.htm
832 *
833 * @param   string $email the address to check
834 * @return  bool          true if address is valid
835 */
836function isvalidemail($email){
837  return eregi("^[0-9a-z]([-_.]?[0-9a-z])*@[0-9a-z]([-.]?[0-9a-z])*\\.[a-z]{2,4}$", $email);
838}
839
840/**
841 * Encrypts a password using the given method and salt
842 *
843 * If the selected method needs a salt and none was given, a random one
844 * is chosen.
845 *
846 * The following methods are understood:
847 *
848 *   smd5  - Salted MD5 hashing
849 *   apr1  - Apache salted MD5 hashing
850 *   md5   - Simple MD5 hashing
851 *   sha1  - SHA1 hashing
852 *   ssha  - Salted SHA1 hashing
853 *   crypt - Unix crypt
854 *   mysql - MySQL password (old method)
855 *   my411 - MySQL 4.1.1 password
856 *
857 * @author  Andreas Gohr <andi@splitbrain.org>
858 * @return  string  The crypted password
859 */
860function auth_cryptPassword($clear,$method='',$salt=null){
861    global $conf;
862    if(empty($method)) $method = $conf['passcrypt'];
863
864    //prepare a salt
865    if(is_null($salt)) $salt = md5(uniqid(rand(), true));
866
867    switch(strtolower($method)){
868        case 'smd5':
869            if(defined('CRYPT_MD5')) return crypt($clear,'$1$'.substr($salt,0,8).'$');
870            // when crypt can't handle SMD5, falls through to pure PHP implementation
871            $magic = '1';
872        case 'apr1':
873            //from http://de.php.net/manual/en/function.crypt.php#73619 comment by <mikey_nich at hotmail dot com>
874            if(!$magic) $magic = 'apr1';
875            $salt = substr($salt,0,8);
876            $len = strlen($clear);
877            $text = $clear.'$'.$magic.'$'.$salt;
878            $bin = pack("H32", md5($clear.$salt.$clear));
879            for($i = $len; $i > 0; $i -= 16) { $text .= substr($bin, 0, min(16, $i)); }
880            for($i = $len; $i > 0; $i >>= 1) { $text .= ($i & 1) ? chr(0) : $clear{0}; }
881            $bin = pack("H32", md5($text));
882            for($i = 0; $i < 1000; $i++) {
883                $new = ($i & 1) ? $clear : $bin;
884                if ($i % 3) $new .= $salt;
885                if ($i % 7) $new .= $clear;
886                $new .= ($i & 1) ? $bin : $clear;
887                $bin = pack("H32", md5($new));
888            }
889            $tmp = '';
890            for ($i = 0; $i < 5; $i++) {
891                $k = $i + 6;
892                $j = $i + 12;
893                if ($j == 16) $j = 5;
894                $tmp = $bin[$i].$bin[$k].$bin[$j].$tmp;
895            }
896            $tmp = chr(0).chr(0).$bin[11].$tmp;
897            $tmp = strtr(strrev(substr(base64_encode($tmp), 2)),
898                    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
899                    "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
900            return '$'.$magic.'$'.$salt.'$'.$tmp;
901        case 'md5':
902            return md5($clear);
903        case 'sha1':
904            return sha1($clear);
905        case 'ssha':
906            $salt=substr($salt,0,4);
907            return '{SSHA}'.base64_encode(pack("H*", sha1($clear.$salt)).$salt);
908        case 'crypt':
909            return crypt($clear,substr($salt,0,2));
910        case 'mysql':
911            //from http://www.php.net/mysql comment by <soren at byu dot edu>
912            $nr=0x50305735;
913            $nr2=0x12345671;
914            $add=7;
915            $charArr = preg_split("//", $clear);
916            foreach ($charArr as $char) {
917                if (($char == '') || ($char == ' ') || ($char == '\t')) continue;
918                $charVal = ord($char);
919                $nr ^= ((($nr & 63) + $add) * $charVal) + ($nr << 8);
920                $nr2 += ($nr2 << 8) ^ $nr;
921                $add += $charVal;
922            }
923            return sprintf("%08x%08x", ($nr & 0x7fffffff), ($nr2 & 0x7fffffff));
924        case 'my411':
925            return '*'.sha1(pack("H*", sha1($clear)));
926        default:
927            msg("Unsupported crypt method $method",-1);
928    }
929}
930
931/**
932 * Verifies a cleartext password against a crypted hash
933 *
934 * The method and salt used for the crypted hash is determined automatically
935 * then the clear text password is crypted using the same method. If both hashs
936 * match true is is returned else false
937 *
938 * @author  Andreas Gohr <andi@splitbrain.org>
939 * @return  bool
940 */
941function auth_verifyPassword($clear,$crypt){
942    $method='';
943    $salt='';
944
945    //determine the used method and salt
946    $len = strlen($crypt);
947    if(preg_match('/^\$1\$([^\$]{0,8})\$/',$crypt,$m)){
948        $method = 'smd5';
949        $salt   = $m[1];
950    }elseif(preg_match('/^\$apr1\$([^\$]{0,8})\$/',$crypt,$m)){
951        $method = 'apr1';
952        $salt   = $m[1];
953    }elseif(substr($crypt,0,6) == '{SSHA}'){
954        $method = 'ssha';
955        $salt   = substr(base64_decode(substr($crypt, 6)),20);
956    }elseif($len == 32){
957        $method = 'md5';
958    }elseif($len == 40){
959        $method = 'sha1';
960    }elseif($len == 16){
961        $method = 'mysql';
962    }elseif($len == 41 && $crypt[0] == '*'){
963        $method = 'my411';
964    }else{
965        $method = 'crypt';
966        $salt   = substr($crypt,0,2);
967    }
968
969    //crypt and compare
970    if(auth_cryptPassword($clear,$method,$salt) === $crypt){
971        return true;
972    }
973    return false;
974}
975
976//Setup VIM: ex: et ts=2 enc=utf-8 :
977