Annotation of loncom/interface/resetpw.pm, revision 1.22

1.1       raeburn     1: # The LearningOnline Network
                      2: # Allow access to password changing via a token sent to user's e-mail. 
                      3: #
1.22    ! raeburn     4: # $Id: resetpw.pm,v 1.21 2009/10/08 22:59:18 raeburn Exp $
1.14      bisitz      5: #
1.1       raeburn     6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
                     28: #
1.21      raeburn    29: 
                     30: =pod
                     31: 
                     32: =head1 NAME
                     33: 
1.22    ! raeburn    34: Apache::resetpw: reset user password.
1.21      raeburn    35: 
                     36: =head1 SYNOPSIS
                     37: 
                     38: Handles resetting of forgotten passwords.
                     39: 
                     40: This is part of the LearningOnline Network with CAPA project
                     41: described at http://www.lon-capa.org.
                     42:  
                     43: =head1 OVERVIEW
                     44: 
                     45: A user with an e-mail address associated with his/her LON-CAPA username
1.22    ! raeburn    46: can reset a forgotten password, using a link sent to the e-mail address
1.21      raeburn    47: if the authentication type for the account is "internal".
                     48: 
                     49: =cut
                     50: 
1.1       raeburn    51: package Apache::resetpw;
                     52: 
                     53: use strict;
                     54: use Apache::Constants qw(:common);
                     55: use Apache::lonacc;
                     56: use Apache::lonnet;
                     57: use Apache::loncommon;
                     58: use Apache::lonlocal;
                     59: use LONCAPA;
                     60: 
                     61: sub handler {
                     62:     my $r = shift;
                     63:     &Apache::loncommon::content_type($r,'text/html');
                     64:     $r->send_http_header;
                     65:     if ($r->header_only) {
                     66:         return OK;
                     67:     }
                     68:     my $contact_name = &mt('LON-CAPA helpdesk');
                     69:     my $contact_email =  $r->dir_config('lonSupportEMail');
                     70:     my $server = $r->dir_config('lonHostID');
1.19      raeburn    71:     my $defdom = &Apache::lonnet::default_login_domain();
1.1       raeburn    72:     &Apache::lonacc::get_posted_cgi($r);
                     73:     &Apache::lonlocal::get_language_handle($r);
                     74:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['token']);
                     75:     
                     76:     my @emailtypes = ('permanentemail','critnotification','notification');
1.2       albertel   77:     my $uname = &unescape($env{'form.uname'});
1.1       raeburn    78:     my $udom = $env{'form.udom'};
                     79:     my $token = $env{'form.token'};
1.10      raeburn    80:     my $start_page =
                     81:         &Apache::loncommon::start_page('Reset password','',
                     82:                                            {
                     83:                                              'no_inline_link'   => 1,});
                     84:     $r->print($start_page);
1.11      bisitz     85:     $r->print('<h3>'.&mt('Reset forgotten LON-CAPA password').'</h3>');
1.1       raeburn    86:     my $output;
                     87:     if ($token) {
                     88:         $output = &reset_passwd($r,$token,$contact_name,$contact_email);
                     89:     } elsif ($uname && $udom) {
1.6       albertel   90:         my $domdesc = &Apache::lonnet::domain($udom,'description');
1.1       raeburn    91:         my $authtype = &Apache::lonnet::queryauthenticate($uname,$udom);
                     92:         if ($authtype =~ /^internal/) {
1.3       raeburn    93:             my $useremail = $env{'form.useremail'};
                     94:             if ($useremail !~ /^[^\@]+\@[^\@]+\.[^\@\.]+$/) {
                     95:                 $output = &invalid_state('baduseremail',$domdesc,
                     96:                                          $contact_name,$contact_email);
                     97:             } else {
                     98:                 my %userinfo = 
1.4       albertel   99: 		    &Apache::lonnet::get('environment',\@emailtypes,
                    100: 					 $udom,$uname);
1.18      raeburn   101:                 my @allemails;
1.3       raeburn   102:                 foreach my $type (@emailtypes) {
1.18      raeburn   103:                     my $email = $userinfo{$type};
                    104:                     my @items;
                    105:                     if ($email =~ /,/) {
                    106:                         @items = split(',',$userinfo{$type});
                    107:                     } else {
                    108:                         @items = ($email);
                    109:                     }
                    110:                     foreach my $item (@items) {
                    111:                         if ($item =~ /^[^\@]+\@[^\@]+\.[^\@\.]+$/) {
                    112:                             unless(grep(/^\Q$item\E$/,@allemails)) { 
                    113:                                 push(@allemails,$item);
                    114:                             }
                    115:                         }
1.3       raeburn   116:                     }
                    117:                 }
1.18      raeburn   118:                 if (@allemails > 0) {
                    119:                     if (grep(/^\Q$useremail\E$/,@allemails)) {
                    120:                         $output = &send_token($uname,$udom,$useremail,$server,
1.3       raeburn   121:                                               $domdesc,$contact_name,
                    122:                                               $contact_email);
                    123:                     } else {
                    124:                         $output = &invalid_state('mismatch',$domdesc,
                    125:                                                  $contact_name,
                    126:                                                  $contact_email);
                    127:                     }
                    128:                 } else {
                    129:                     $output = &invalid_state('missing',$domdesc,
                    130:                                              $contact_name,$contact_email);
1.1       raeburn   131:                 }
                    132:             }
                    133:         } elsif ($authtype =~ /^(krb|unix|local)/) { 
                    134:             $output = &invalid_state('authentication',$domdesc,
                    135:                                      $contact_name,$contact_email);
                    136:         } else {
                    137:             $output = &invalid_state('invalid',$domdesc,
                    138:                                      $contact_name,$contact_email);
                    139:         }
                    140:     } else {
                    141:         $output = &get_uname($defdom);
                    142:     }
                    143:     $r->print($output);
                    144:     $r->print(&Apache::loncommon::end_page());
                    145:     return OK;
                    146: }
                    147: 
                    148: sub get_uname {
                    149:     my ($defdom) = @_;
                    150:     my %lt = &Apache::lonlocal::texthash(
                    151:                                          unam => 'username',
                    152:                                          udom => 'domain',
1.12      schafran  153:                                          uemail => 'E-mail address in LON-CAPA',
1.1       raeburn   154:                                          proc => 'Proceed');
                    155: 
                    156:     my $msg = &mt('If you use the same account for other campus services besides LON-CAPA, (e.g., e-mail, course registration, etc.), a separate centrally managed mechanism likely exists to reset a password.  However, if your account is used for just LON-CAPA access you will probably be able to reset a password from this page.');
1.8       bisitz    157:     $msg .= '<br /><br />'.&mt('Three conditions must be met:')
                    158:            .'<ul><li>'.&mt('An e-mail address must have previously been associated with your LON-CAPA username.').'</li>'
                    159:            .'<li>'.&mt('You must be able to access e-mail sent to that address.').'</li>'
                    160:            .'<li>'.&mt('Your LON-CAPA account must be of a type for which LON-CAPA can reset a password.')
                    161:            .'</ul>';
1.1       raeburn   162:     $msg .= qq|
                    163: <form name="forgotpw" method="post">
                    164: <table>
                    165: <tr><td>
                    166: <tr><td align="left">LON-CAPA $lt{'unam'}:                      </td>
1.16      bisitz    167:     <td><input type="text" name="uname" size="15" /></td></tr>
1.1       raeburn   168: <tr><td align="left">LON-CAPA $lt{'udom'}:                      </td>
                    169:     <td>|;
                    170:     $msg .= &Apache::loncommon::select_dom_form($defdom,'udom');
                    171:     $msg .= qq|</td></tr>
1.3       raeburn   172: <tr><td align="left">$lt{'uemail'}:                             </td>
1.16      bisitz    173:     <td><input type="text" name="useremail" size="30" /></td></tr>
1.1       raeburn   174: <tr><td colspan="2" align="left"><br />
1.16      bisitz    175:     <input type="submit" value="$lt{'proc'}" /></td></tr>
1.1       raeburn   176: </table>
1.2       albertel  177: </form>
1.1       raeburn   178: |;
                    179:     return $msg;
                    180: }
                    181: 
                    182: sub send_token {
                    183:     my ($uname,$udom,$email,$server,$domdesc,$contact_name,
                    184:         $contact_email) = @_;
1.11      bisitz    185:     my $msg = &mt('Thank you for your request to reset the password for your LON-CAPA account.').'<br /><br />';
1.1       raeburn   186: 
                    187:     my $now = time;
                    188:     my $temppasswd = &create_passwd();
1.2       albertel  189:     my %info = ('ip'         => $ENV{'REMOTE_ADDR'},
                    190: 		'time'       => $now,
                    191: 		'domain'     => $udom,
                    192: 		'username'   => $uname,
                    193: 		'email'      => $email,
                    194: 		'temppasswd' => $temppasswd);
1.1       raeburn   195: 
1.3       raeburn   196:     my $token = &Apache::lonnet::tmpput(\%info,$server,'resetpw');
                    197:     if ($token !~ /^error/ && $token ne 'no_such_host') {
1.2       albertel  198:         my $esc_token = &escape($token);
1.15      raeburn   199:         my $showtime = &Apache::lonlocal::locallocaltime(time);
                    200:         my $reseturl = &Apache::lonnet::absolute_url().'/adm/resetpw?token='.$esc_token;
                    201:         my $mailmsg = &mt('A request was submitted on [_1] for reset of the password for your LON-CAPA account.',$showtime).' '.&mt('To complete this process please open a web browser and enter the following URL in the address/location box: [_1]',$reseturl);
1.1       raeburn   202:         my $result = &send_mail($domdesc,$email,$mailmsg,$contact_name,
                    203:                                 $contact_email);
                    204:         if ($result eq 'ok') {
1.13      schafran  205:             $msg .= &mt("An e-mail sent to the e-mail address associated with your LON-CAPA account includes the web address for the link you should use to complete the reset process.<br /><br />The link included in the message will be valid for the next <b>two</b> hours.");
1.1       raeburn   206:         } else {
1.7       albertel  207:             $msg .= &mt("An error occurred when sending a message to the e-mail address associated with your LON-CAPA account. Please contact the [_1] ([_2]) for assistance.",$contact_name,$contact_email);
1.1       raeburn   208:         }
                    209:     } else {
1.4       albertel  210:         $msg .= &mt("An error occurred creating a token required for the password reset process. Please contact the [_1] ([_2]) for assistance.",$contact_name,$contact_email);
1.1       raeburn   211:     }
                    212:     return $msg;
                    213: }
                    214: 
                    215: sub send_mail {
                    216:     my ($domdesc,$email,$mailmsg,$contact_name,$contact_email) = @_;
                    217:     my $outcome;
                    218:     my $requestmail = "To: $email\n".
                    219:                       "From: $contact_name <$contact_email>\n".
                    220:                       "Subject: ".&mt('Your LON-CAPA account')."\n".
                    221:                       "\n\n".$mailmsg."\n\n".
                    222:                       &mt('[_1] LON-CAPA support team',$domdesc)."\n".
                    223:                       "$contact_email\n";
                    224:     if (open(MAIL, "|/usr/lib/sendmail -oi -t -odb")) {
                    225:         print MAIL $requestmail;
                    226:         close(MAIL);
                    227:         $outcome = 'ok';
                    228:     } else {
                    229:         $outcome = 'fail';
                    230:     }
                    231:     return $outcome;
                    232: }
                    233: 
                    234: sub invalid_state {
                    235:     my ($error,$domdesc,$contact_name,$contact_email) = @_;
                    236:     my $msg;
                    237:     if ($error eq 'invalid') {
1.8       bisitz    238:         $msg = &mt('The username you provided was not verified as a valid username in the LON-CAPA system for the [_1] domain.',$domdesc)
                    239:               .' '.&mt('Please [_1]go back[_2] and try again.','<a href="javascript:history.go(-1)"><u>','</u></a>');
1.1       raeburn   240:     } else {
1.3       raeburn   241:         if ($error eq 'baduseremail') {
                    242:             $msg = &mt('The e-mail address you provided does not appear to be a valid address.');
                    243:         } elsif ($error eq 'mismatch') {
                    244:             $msg = &mt('The e-mail address you provided does not match the address recorded in the LON-CAPA system for the username and domain you provided.');  
                    245:         } elsif ($error eq 'missing') {
1.1       raeburn   246:             $msg = &mt('A valid e-mail address was not located in the LON-CAPA system for the username and domain you provided.');
                    247:         } elsif ($error eq 'authentication') {
                    248:             $msg = &mt('The username you provided uses an authentication type which can not be reset directly via LON-CAPA.');
                    249:         }
                    250:         if ($contact_email ne '') {
                    251:             my $escuri = &HTML::Entities::encode('/adm/resetpw','&<>"');
1.8       bisitz    252:             $msg .= '<br /> '.&mt('You may wish to contact the [_1]LON-CAPA helpdesk[_2] for the [_3] domain.'
                    253:                                  ,'<a href="/adm/helpdesk?origurl='.$escuri.'">','</a>',$domdesc);
1.1       raeburn   254:         } else {
1.8       bisitz    255:             $msg .= '<br /> '.&mt('You may wish to send an e-mail to the server administrator: [_1] for the [_2] domain.',$Apache::lonnet::perlvar{'AdminEmail'},$domdesc);
1.1       raeburn   256:         }
                    257:     }
                    258:     return $msg;
                    259: }
                    260: 
                    261: sub reset_passwd {
                    262:     my ($r,$token,$contact_name,$contact_email) = @_;
                    263:     my $msg;
                    264:     my %data = &Apache::lonnet::tmpget($token);
                    265:     my $now = time;
                    266:     if (keys(%data) == 0) {
1.17      bisitz    267:         $msg = &mt('Sorry, the URL you provided to complete the reset of your password was invalid. Either the token included in the URL has been deleted or the URL you provided was invalid. Please submit a [_1]new request[_2] for a password reset, and follow the link to the new URL included in the e-mail that will be sent to you, to allow you to enter a new password.'
                    268:                   ,'<a href="/adm/resetpw">','</a>');
1.1       raeburn   269:         return $msg;
                    270:     }
                    271:     if (($data{'time'} =~ /^\d+$/) && 
                    272:         ($data{'username'} ne '') && 
                    273:         ($data{'domain'} ne '') && 
1.3       raeburn   274:         ($data{'email'}  =~ /^[^\@]+\@[^\@]+\.[^\@\.]+$/) && 
1.1       raeburn   275:         ($data{'temppasswd'} =~/^\w+$/)) {
1.9       raeburn   276:         my $reqtime = &Apache::lonlocal::locallocaltime($data{'time'});
1.1       raeburn   277:         if ($now - $data{'time'} < 7200) {
                    278:             if ($env{'form.action'} eq 'verify_and_change_pass') {
1.22    ! raeburn   279:                 unless (($env{'form.uname'} eq $data{'username'}) && ($env{'form.udom'} eq $data{'domain'}) && ($env{'form.email'} eq $data{'email'})) {
        !           280:                     $msg = &generic_failure_msg($contact_name,$contact_email);
        !           281:                     return $msg;
        !           282:                 }
1.1       raeburn   283:                 my $change_failed = 
1.2       albertel  284: 		    &Apache::lonpreferences::verify_and_change_password($r,'reset_by_email',$token);
1.1       raeburn   285:                 if (!$change_failed) {
                    286:                     my $delete = &Apache::lonnet::tmpdel($token);
1.9       raeburn   287:                     my $now = &Apache::lonlocal::locallocaltime(time);
1.1       raeburn   288:                     my $domdesc = 
1.6       albertel  289: 			&Apache::lonnet::domain($data{'domain'},'description');
1.1       raeburn   290:                     my $mailmsg = &mt('The password for your LON-CAPA account in the [_1] domain was changed [_2] from IP address: [_3].  If you did not perform this change or authorize it, please contact the [_4] ([_5]).',$domdesc,$now,$ENV{'REMOTE_ADDR'},$contact_name,$contact_email)."\n";
                    291:                     my $result = &send_mail($domdesc,$data{'email'},$mailmsg,
                    292:                                             $contact_name,$contact_email);
                    293:                     if ($result eq 'ok') {
                    294:                         $msg .= &mt('An e-mail confirming setting of the password for your LON-CAPA account has been sent to [_1].',$data{'email'});
                    295:                     } else {
                    296:                         $msg .= &mt('An error occurred when sending e-mail to [_1] confirming setting of your new password.',$data{'email'});
                    297:                     }
1.17      bisitz    298:                     $msg .= '<br /><br />'
                    299:                            .'<a href="/adm/login">'.&mt('Go to the login page').'</a>.';
1.20      raeburn   300:                 } elsif ($change_failed eq 'invalid_client') {
                    301:                     my $homeserver = &Apache::lonnet::homeserver($data{'username'},$data{'domain'});
                    302:                     if ($homeserver eq 'no_host') {
                    303:                         $msg .= &generic_failure_msg($contact_name,$contact_email);
                    304:                     } else {
                    305:                         my $protocol = $Apache::lonnet::protocol{$homeserver};
                    306:                         $protocol = 'http' if ($protocol ne 'https');
                    307:                         my $url = $protocol.'://'.&Apache::lonnet::hostname($homeserver).
                    308:                                   '/adm/resetpw';
                    309:                         my ($opentag,$closetag);
                    310:                         if ($url) {
                    311:                            $opentag = '<a href="'.$url.'">';
                    312:                            $closetag = '</a>';
                    313:                         }
                    314:                         $msg .= &mt('A problem occurred when attempting to reset the password for your account. Please try again from your [_1]home server[_2].',$opentag,$closetag);
                    315:                     }
1.1       raeburn   316:                 } else {
1.20      raeburn   317:                     $msg .= &generic_failure_msg($contact_name,$contact_email);
1.1       raeburn   318:                 }
                    319:             } else {
1.13      schafran  320:                 $r->print(&mt('The token included in an e-mail sent to you [_1] has been verified, so you may now proceed to reset the password for your LON-CAPA account.',$reqtime).'<br /><br />');
1.1       raeburn   321:                 $r->print(&mt('Please enter the username and domain of the LON-CAPA account, and the associated e-mail address, for which you are setting a password. The new password must contain at least 7 characters.').' '.&mt('Your new password will be sent to the LON-CAPA server in an encrypted form.').'<br />');
                    322:                 &Apache::lonpreferences::passwordchanger($r,'','reset_by_email',$token);
                    323:             }
                    324:         } else {
1.17      bisitz    325:             $msg = &mt('Sorry, the token generated when you requested a password reset has expired. Please submit a [_1]new request[_2], and follow the link to the web page included in the new e-mail that will be sent to you, to allow you to enter a new password.'
                    326:                       ,'<a href="/adm/resetpw">','</a>');
1.1       raeburn   327:         }
                    328:     } else {
1.17      bisitz    329:         $msg .= &mt('Sorry, the URL generated when you requested reset of your password contained incomplete information. Please submit a [_1]new request[_2] for a password reset, and use the new URL that will be sent to your e-mail account to complete the process.'
                    330:                    ,'<a href="/adm/resetpw">','</a>');
1.1       raeburn   331:     }
                    332:     return $msg;
                    333: }
                    334: 
1.20      raeburn   335: sub generic_failure_msg {
                    336:     my ($contact_name,$contact_email) = @_;
                    337:     return &mt('A problem occurred when attempting to reset the password for your account. Please contact the [_1] - ([_2]) for assistance.',
                    338:               $contact_name,'<a href="mailto:'.$contact_email.'">'.$contact_email.'</a>');
                    339: }
                    340: 
1.1       raeburn   341: sub create_passwd {
                    342:     my $passwd = '';
1.2       albertel  343:     my @letts = ("a".."z");
1.1       raeburn   344:     for (my $i=0; $i<8; $i++) {
1.2       albertel  345:         my $lettnum = int(rand(2));
1.1       raeburn   346:         my $item = '';
                    347:         if ($lettnum) {
1.2       albertel  348:             $item = $letts[int(rand(26))];
                    349:             my $uppercase = int(rand(2));
1.1       raeburn   350:             if ($uppercase) {
                    351:                 $item =~ tr/a-z/A-Z/;
                    352:             }
                    353:         } else {
1.2       albertel  354:             $item = int(rand(10));
1.1       raeburn   355:         }
                    356:         $passwd .= $item;
                    357:     }
                    358:     return ($passwd);
                    359: }
                    360: 
                    361: 1;

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