Annotation of loncom/interface/resetpw.pm, revision 1.20

1.1       raeburn     1: # The LearningOnline Network
                      2: # Allow access to password changing via a token sent to user's e-mail. 
                      3: #
1.20    ! raeburn     4: # $Id: resetpw.pm,v 1.19 2009/10/01 17:22:13 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: #
                     29: package Apache::resetpw;
                     30: 
                     31: use strict;
                     32: use Apache::Constants qw(:common);
                     33: use Apache::lonacc;
                     34: use Apache::lonnet;
                     35: use Apache::loncommon;
                     36: use Apache::lonlocal;
                     37: use LONCAPA;
                     38: 
                     39: sub handler {
                     40:     my $r = shift;
                     41:     &Apache::loncommon::content_type($r,'text/html');
                     42:     $r->send_http_header;
                     43:     if ($r->header_only) {
                     44:         return OK;
                     45:     }
                     46:     my $contact_name = &mt('LON-CAPA helpdesk');
                     47:     my $contact_email =  $r->dir_config('lonSupportEMail');
                     48:     my $server = $r->dir_config('lonHostID');
1.19      raeburn    49:     my $defdom = &Apache::lonnet::default_login_domain();
1.1       raeburn    50:     &Apache::lonacc::get_posted_cgi($r);
                     51:     &Apache::lonlocal::get_language_handle($r);
                     52:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['token']);
                     53:     
                     54:     my @emailtypes = ('permanentemail','critnotification','notification');
1.2       albertel   55:     my $uname = &unescape($env{'form.uname'});
1.1       raeburn    56:     my $udom = $env{'form.udom'};
                     57:     my $token = $env{'form.token'};
1.10      raeburn    58:     my $start_page =
                     59:         &Apache::loncommon::start_page('Reset password','',
                     60:                                            {
                     61:                                              'no_inline_link'   => 1,});
                     62:     $r->print($start_page);
1.11      bisitz     63:     $r->print('<h3>'.&mt('Reset forgotten LON-CAPA password').'</h3>');
1.1       raeburn    64:     my $output;
                     65:     if ($token) {
                     66:         $output = &reset_passwd($r,$token,$contact_name,$contact_email);
                     67:     } elsif ($uname && $udom) {
1.6       albertel   68:         my $domdesc = &Apache::lonnet::domain($udom,'description');
1.1       raeburn    69:         my $authtype = &Apache::lonnet::queryauthenticate($uname,$udom);
                     70:         if ($authtype =~ /^internal/) {
1.3       raeburn    71:             my $useremail = $env{'form.useremail'};
                     72:             if ($useremail !~ /^[^\@]+\@[^\@]+\.[^\@\.]+$/) {
                     73:                 $output = &invalid_state('baduseremail',$domdesc,
                     74:                                          $contact_name,$contact_email);
                     75:             } else {
                     76:                 my %userinfo = 
1.4       albertel   77: 		    &Apache::lonnet::get('environment',\@emailtypes,
                     78: 					 $udom,$uname);
1.18      raeburn    79:                 my @allemails;
1.3       raeburn    80:                 foreach my $type (@emailtypes) {
1.18      raeburn    81:                     my $email = $userinfo{$type};
                     82:                     my @items;
                     83:                     if ($email =~ /,/) {
                     84:                         @items = split(',',$userinfo{$type});
                     85:                     } else {
                     86:                         @items = ($email);
                     87:                     }
                     88:                     foreach my $item (@items) {
                     89:                         if ($item =~ /^[^\@]+\@[^\@]+\.[^\@\.]+$/) {
                     90:                             unless(grep(/^\Q$item\E$/,@allemails)) { 
                     91:                                 push(@allemails,$item);
                     92:                             }
                     93:                         }
1.3       raeburn    94:                     }
                     95:                 }
1.18      raeburn    96:                 if (@allemails > 0) {
                     97:                     if (grep(/^\Q$useremail\E$/,@allemails)) {
                     98:                         $output = &send_token($uname,$udom,$useremail,$server,
1.3       raeburn    99:                                               $domdesc,$contact_name,
                    100:                                               $contact_email);
                    101:                     } else {
                    102:                         $output = &invalid_state('mismatch',$domdesc,
                    103:                                                  $contact_name,
                    104:                                                  $contact_email);
                    105:                     }
                    106:                 } else {
                    107:                     $output = &invalid_state('missing',$domdesc,
                    108:                                              $contact_name,$contact_email);
1.1       raeburn   109:                 }
                    110:             }
                    111:         } elsif ($authtype =~ /^(krb|unix|local)/) { 
                    112:             $output = &invalid_state('authentication',$domdesc,
                    113:                                      $contact_name,$contact_email);
                    114:         } else {
                    115:             $output = &invalid_state('invalid',$domdesc,
                    116:                                      $contact_name,$contact_email);
                    117:         }
                    118:     } else {
                    119:         $output = &get_uname($defdom);
                    120:     }
                    121:     $r->print($output);
                    122:     $r->print(&Apache::loncommon::end_page());
                    123:     return OK;
                    124: }
                    125: 
                    126: sub get_uname {
                    127:     my ($defdom) = @_;
                    128:     my %lt = &Apache::lonlocal::texthash(
                    129:                                          unam => 'username',
                    130:                                          udom => 'domain',
1.12      schafran  131:                                          uemail => 'E-mail address in LON-CAPA',
1.1       raeburn   132:                                          proc => 'Proceed');
                    133: 
                    134:     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    135:     $msg .= '<br /><br />'.&mt('Three conditions must be met:')
                    136:            .'<ul><li>'.&mt('An e-mail address must have previously been associated with your LON-CAPA username.').'</li>'
                    137:            .'<li>'.&mt('You must be able to access e-mail sent to that address.').'</li>'
                    138:            .'<li>'.&mt('Your LON-CAPA account must be of a type for which LON-CAPA can reset a password.')
                    139:            .'</ul>';
1.1       raeburn   140:     $msg .= qq|
                    141: <form name="forgotpw" method="post">
                    142: <table>
                    143: <tr><td>
                    144: <tr><td align="left">LON-CAPA $lt{'unam'}:                      </td>
1.16      bisitz    145:     <td><input type="text" name="uname" size="15" /></td></tr>
1.1       raeburn   146: <tr><td align="left">LON-CAPA $lt{'udom'}:                      </td>
                    147:     <td>|;
                    148:     $msg .= &Apache::loncommon::select_dom_form($defdom,'udom');
                    149:     $msg .= qq|</td></tr>
1.3       raeburn   150: <tr><td align="left">$lt{'uemail'}:                             </td>
1.16      bisitz    151:     <td><input type="text" name="useremail" size="30" /></td></tr>
1.1       raeburn   152: <tr><td colspan="2" align="left"><br />
1.16      bisitz    153:     <input type="submit" value="$lt{'proc'}" /></td></tr>
1.1       raeburn   154: </table>
1.2       albertel  155: </form>
1.1       raeburn   156: |;
                    157:     return $msg;
                    158: }
                    159: 
                    160: sub send_token {
                    161:     my ($uname,$udom,$email,$server,$domdesc,$contact_name,
                    162:         $contact_email) = @_;
1.11      bisitz    163:     my $msg = &mt('Thank you for your request to reset the password for your LON-CAPA account.').'<br /><br />';
1.1       raeburn   164: 
                    165:     my $now = time;
                    166:     my $temppasswd = &create_passwd();
1.2       albertel  167:     my %info = ('ip'         => $ENV{'REMOTE_ADDR'},
                    168: 		'time'       => $now,
                    169: 		'domain'     => $udom,
                    170: 		'username'   => $uname,
                    171: 		'email'      => $email,
                    172: 		'temppasswd' => $temppasswd);
1.1       raeburn   173: 
1.3       raeburn   174:     my $token = &Apache::lonnet::tmpput(\%info,$server,'resetpw');
                    175:     if ($token !~ /^error/ && $token ne 'no_such_host') {
1.2       albertel  176:         my $esc_token = &escape($token);
1.15      raeburn   177:         my $showtime = &Apache::lonlocal::locallocaltime(time);
                    178:         my $reseturl = &Apache::lonnet::absolute_url().'/adm/resetpw?token='.$esc_token;
                    179:         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   180:         my $result = &send_mail($domdesc,$email,$mailmsg,$contact_name,
                    181:                                 $contact_email);
                    182:         if ($result eq 'ok') {
1.13      schafran  183:             $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   184:         } else {
1.7       albertel  185:             $msg .= &mt("An error occurred when sending a message to the e-mail address associated with your LON-CAPA account. Please contact the [_1] ([_2]) for assistance.",$contact_name,$contact_email);
1.1       raeburn   186:         }
                    187:     } else {
1.4       albertel  188:         $msg .= &mt("An error occurred creating a token required for the password reset process. Please contact the [_1] ([_2]) for assistance.",$contact_name,$contact_email);
1.1       raeburn   189:     }
                    190:     return $msg;
                    191: }
                    192: 
                    193: sub send_mail {
                    194:     my ($domdesc,$email,$mailmsg,$contact_name,$contact_email) = @_;
                    195:     my $outcome;
                    196:     my $requestmail = "To: $email\n".
                    197:                       "From: $contact_name <$contact_email>\n".
                    198:                       "Subject: ".&mt('Your LON-CAPA account')."\n".
                    199:                       "\n\n".$mailmsg."\n\n".
                    200:                       &mt('[_1] LON-CAPA support team',$domdesc)."\n".
                    201:                       "$contact_email\n";
                    202:     if (open(MAIL, "|/usr/lib/sendmail -oi -t -odb")) {
                    203:         print MAIL $requestmail;
                    204:         close(MAIL);
                    205:         $outcome = 'ok';
                    206:     } else {
                    207:         $outcome = 'fail';
                    208:     }
                    209:     return $outcome;
                    210: }
                    211: 
                    212: sub invalid_state {
                    213:     my ($error,$domdesc,$contact_name,$contact_email) = @_;
                    214:     my $msg;
                    215:     if ($error eq 'invalid') {
1.8       bisitz    216:         $msg = &mt('The username you provided was not verified as a valid username in the LON-CAPA system for the [_1] domain.',$domdesc)
                    217:               .' '.&mt('Please [_1]go back[_2] and try again.','<a href="javascript:history.go(-1)"><u>','</u></a>');
1.1       raeburn   218:     } else {
1.3       raeburn   219:         if ($error eq 'baduseremail') {
                    220:             $msg = &mt('The e-mail address you provided does not appear to be a valid address.');
                    221:         } elsif ($error eq 'mismatch') {
                    222:             $msg = &mt('The e-mail address you provided does not match the address recorded in the LON-CAPA system for the username and domain you provided.');  
                    223:         } elsif ($error eq 'missing') {
1.1       raeburn   224:             $msg = &mt('A valid e-mail address was not located in the LON-CAPA system for the username and domain you provided.');
                    225:         } elsif ($error eq 'authentication') {
                    226:             $msg = &mt('The username you provided uses an authentication type which can not be reset directly via LON-CAPA.');
                    227:         }
                    228:         if ($contact_email ne '') {
                    229:             my $escuri = &HTML::Entities::encode('/adm/resetpw','&<>"');
1.8       bisitz    230:             $msg .= '<br /> '.&mt('You may wish to contact the [_1]LON-CAPA helpdesk[_2] for the [_3] domain.'
                    231:                                  ,'<a href="/adm/helpdesk?origurl='.$escuri.'">','</a>',$domdesc);
1.1       raeburn   232:         } else {
1.8       bisitz    233:             $msg .= '<br /> '.&mt('You may wish to send an e-mail to the server administrator: [_1] for the [_2] domain.',$Apache::lonnet::perlvar{'AdminEmail'},$domdesc);
1.1       raeburn   234:         }
                    235:     }
                    236:     return $msg;
                    237: }
                    238: 
                    239: sub reset_passwd {
                    240:     my ($r,$token,$contact_name,$contact_email) = @_;
                    241:     my $msg;
                    242:     my %data = &Apache::lonnet::tmpget($token);
                    243:     my $now = time;
                    244:     if (keys(%data) == 0) {
1.17      bisitz    245:         $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.'
                    246:                   ,'<a href="/adm/resetpw">','</a>');
1.1       raeburn   247:         return $msg;
                    248:     }
                    249:     if (($data{'time'} =~ /^\d+$/) && 
                    250:         ($data{'username'} ne '') && 
                    251:         ($data{'domain'} ne '') && 
1.3       raeburn   252:         ($data{'email'}  =~ /^[^\@]+\@[^\@]+\.[^\@\.]+$/) && 
1.1       raeburn   253:         ($data{'temppasswd'} =~/^\w+$/)) {
1.9       raeburn   254:         my $reqtime = &Apache::lonlocal::locallocaltime($data{'time'});
1.1       raeburn   255:         if ($now - $data{'time'} < 7200) {
                    256:             if ($env{'form.action'} eq 'verify_and_change_pass') {
                    257:                 my $change_failed = 
1.2       albertel  258: 		    &Apache::lonpreferences::verify_and_change_password($r,'reset_by_email',$token);
1.1       raeburn   259:                 if (!$change_failed) {
                    260:                     my $delete = &Apache::lonnet::tmpdel($token);
1.9       raeburn   261:                     my $now = &Apache::lonlocal::locallocaltime(time);
1.1       raeburn   262:                     my $domdesc = 
1.6       albertel  263: 			&Apache::lonnet::domain($data{'domain'},'description');
1.1       raeburn   264:                     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";
                    265:                     my $result = &send_mail($domdesc,$data{'email'},$mailmsg,
                    266:                                             $contact_name,$contact_email);
                    267:                     if ($result eq 'ok') {
                    268:                         $msg .= &mt('An e-mail confirming setting of the password for your LON-CAPA account has been sent to [_1].',$data{'email'});
                    269:                     } else {
                    270:                         $msg .= &mt('An error occurred when sending e-mail to [_1] confirming setting of your new password.',$data{'email'});
                    271:                     }
1.17      bisitz    272:                     $msg .= '<br /><br />'
                    273:                            .'<a href="/adm/login">'.&mt('Go to the login page').'</a>.';
1.20    ! raeburn   274:                 } elsif ($change_failed eq 'invalid_client') {
        !           275:                     my $homeserver = &Apache::lonnet::homeserver($data{'username'},$data{'domain'});
        !           276:                     if ($homeserver eq 'no_host') {
        !           277:                         $msg .= &generic_failure_msg($contact_name,$contact_email);
        !           278:                     } else {
        !           279:                         my $protocol = $Apache::lonnet::protocol{$homeserver};
        !           280:                         $protocol = 'http' if ($protocol ne 'https');
        !           281:                         my $url = $protocol.'://'.&Apache::lonnet::hostname($homeserver).
        !           282:                                   '/adm/resetpw';
        !           283:                         my ($opentag,$closetag);
        !           284:                         if ($url) {
        !           285:                            $opentag = '<a href="'.$url.'">';
        !           286:                            $closetag = '</a>';
        !           287:                         }
        !           288:                         $msg .= &mt('A problem occurred when attempting to reset the password for your account. Please try again from your [_1]home server[_2].',$opentag,$closetag);
        !           289:                     }
1.1       raeburn   290:                 } else {
1.20    ! raeburn   291:                     $msg .= &generic_failure_msg($contact_name,$contact_email);
1.1       raeburn   292:                 }
                    293:             } else {
1.13      schafran  294:                 $r->print(&mt('The token included in an e-mail sent to you [_1] has been verified, so you may now proceed to reset the password for your LON-CAPA account.',$reqtime).'<br /><br />');
1.1       raeburn   295:                 $r->print(&mt('Please enter the username and domain of the LON-CAPA account, and the associated e-mail address, for which you are setting a password. The new password must contain at least 7 characters.').' '.&mt('Your new password will be sent to the LON-CAPA server in an encrypted form.').'<br />');
                    296:                 &Apache::lonpreferences::passwordchanger($r,'','reset_by_email',$token);
                    297:             }
                    298:         } else {
1.17      bisitz    299:             $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.'
                    300:                       ,'<a href="/adm/resetpw">','</a>');
1.1       raeburn   301:         }
                    302:     } else {
1.17      bisitz    303:         $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.'
                    304:                    ,'<a href="/adm/resetpw">','</a>');
1.1       raeburn   305:     }
                    306:     return $msg;
                    307: }
                    308: 
1.20    ! raeburn   309: sub generic_failure_msg {
        !           310:     my ($contact_name,$contact_email) = @_;
        !           311:     return &mt('A problem occurred when attempting to reset the password for your account. Please contact the [_1] - ([_2]) for assistance.',
        !           312:               $contact_name,'<a href="mailto:'.$contact_email.'">'.$contact_email.'</a>');
        !           313: }
        !           314: 
1.1       raeburn   315: sub create_passwd {
                    316:     my $passwd = '';
1.2       albertel  317:     my @letts = ("a".."z");
1.1       raeburn   318:     for (my $i=0; $i<8; $i++) {
1.2       albertel  319:         my $lettnum = int(rand(2));
1.1       raeburn   320:         my $item = '';
                    321:         if ($lettnum) {
1.2       albertel  322:             $item = $letts[int(rand(26))];
                    323:             my $uppercase = int(rand(2));
1.1       raeburn   324:             if ($uppercase) {
                    325:                 $item =~ tr/a-z/A-Z/;
                    326:             }
                    327:         } else {
1.2       albertel  328:             $item = int(rand(10));
1.1       raeburn   329:         }
                    330:         $passwd .= $item;
                    331:     }
                    332:     return ($passwd);
                    333: }
                    334: 
                    335: 1;

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