--- loncom/auth/lonlogin.pm	2013/01/11 17:35:10	1.153
+++ loncom/auth/lonlogin.pm	2018/09/04 01:10:29	1.158.2.7
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Login Screen
 #
-# $Id: lonlogin.pm,v 1.153 2013/01/11 17:35:10 raeburn Exp $
+# $Id: lonlogin.pm,v 1.158.2.7 2018/09/04 01:10:29 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -38,6 +38,7 @@ use Apache::lonlocal;
 use Apache::migrateuser();
 use lib '/home/httpd/lib/perl/';
 use LONCAPA;
+use CGI::Cookie();
  
 sub handler {
     my $r = shift;
@@ -46,7 +47,7 @@ sub handler {
 	(join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},
 	      $ENV{'REDIRECT_QUERY_STRING'}),
 	 ['interface','username','domain','firsturl','localpath','localres',
-	  'token','role','symb']);
+	  'token','role','symb','iptoken']);
     if (!defined($env{'form.firsturl'})) {
         &Apache::lonacc::get_posted_cgi($r,['firsturl']);
     }
@@ -56,9 +57,35 @@ sub handler {
 	return &Apache::migrateuser::handler($r);
     }
 
+# For "public user" - remove any exising "public" cookie, as user really wants to log-in
+    my ($handle,$lonidsdir,$expirepub,$userdom);
+    unless ($r->header_only) {
+        $handle = &Apache::lonnet::check_for_valid_session($r,'lonID',undef,\$userdom);
+        if ($handle ne '') {
+            $lonidsdir=$r->dir_config('lonIDsDir');
+            if ($handle=~/^publicuser\_/) {
+                unlink($r->dir_config('lonIDsDir')."/$handle.id");
+                undef($handle);
+                undef($userdom);
+                $expirepub = 1;
+            }
+        }
+    }
+
     &Apache::loncommon::no_cache($r);
     &Apache::lonlocal::get_language_handle($r);
     &Apache::loncommon::content_type($r,'text/html');
+    if ($expirepub) {
+        my $c = new CGI::Cookie(-name    => 'lonID',
+                                -value   => '',
+                                -expires => '-10y',);
+        $r->header_out('Set-cookie' => $c);
+    } elsif (($handle eq '') && ($userdom ne '')) {
+        my $c = new CGI::Cookie(-name    => 'lonID',
+                                -value   => '',
+                                -expires => '-10y',);
+        $r->headers_out->add('Set-cookie' => $c);
+    }
     $r->send_http_header;
     return OK if $r->header_only;
 
@@ -70,66 +97,93 @@ sub handler {
 	return OK;
     }
 
+#
+# If browser sent an old cookie for which the session file had been removed
+# check if configuration for user's domain has a portal URL set.  If so
+# switch user's log-in to the portal.
+#
+
+    if (($handle eq '') && ($userdom ne '')) {
+        my %domdefaults = &Apache::lonnet::get_domain_defaults($userdom);
+        if ($domdefaults{'portal_def'} =~ /^https?\:/) {
+            my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,
+                                          {'redirect' => [0,$domdefaults{'portal_def'}],});
+            my $end_page   = &Apache::loncommon::end_page();
+            $r->print($start_page.$end_page);
+            return OK;
+        }
+    }
+
     $env{'form.firsturl'} =~ s/(`)/'/g;
 
 # -------------------------------- Prevent users from attempting to login twice
-    my $handle = &Apache::lonnet::check_for_valid_session($r);
     if ($handle ne '') {
-        my $lonidsdir=$r->dir_config('lonIDsDir');
-        if ($handle=~/^publicuser\_/) {
-# For "public user" - remove it, we apparently really want to login
-	    unlink($r->dir_config('lonIDsDir')."/$handle.id");
-        } else {
-# Indeed, a valid token is found
-            &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
-	    my $start_page = 
-	        &Apache::loncommon::start_page('Already logged in');
-	    my $end_page = 
-	        &Apache::loncommon::end_page();
-            my $dest = '/adm/roles';
-            if ($env{'form.firsturl'} ne '') {
-                $dest = $env{'form.firsturl'}; 
-            }
-	    $r->print(
-                  $start_page
-                 .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
-                 .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
-                  '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
-                 .$end_page
-                 );
-            return OK;
+        &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
+	my $start_page = 
+	    &Apache::loncommon::start_page('Already logged in');
+	my $end_page = 
+	    &Apache::loncommon::end_page();
+        my $dest = '/adm/roles';
+        if ($env{'form.firsturl'} ne '') {
+            $dest = $env{'form.firsturl'}; 
         }
+	$r->print(
+              $start_page
+             .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
+             .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
+              '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
+             .$end_page
+             );
+        return OK;
     }
 
 # ---------------------------------------------------- No valid token, continue
 
- # ---------------------------- Not possible to really login to domain "public"
+# ---------------------------- Not possible to really login to domain "public"
     if ($env{'form.domain'} eq 'public') {
 	$env{'form.domain'}='';
 	$env{'form.username'}='';
     }
+
+# ------ Is this page requested because /adm/migrateuser detected an IP change?
+    my %sessiondata;
+    if ($env{'form.iptoken'}) {
+        %sessiondata = &Apache::lonnet::tmpget($env{'form.iptoken'});
+        unless ($sessiondata{'sessionserver'}) {
+            my $delete = &Apache::lonnet::tmpdel($env{'form.iptoken'});
+            delete($env{'form.iptoken'});
+        }
+    }
 # ----------------------------------------------------------- Process Interface
     $env{'form.interface'}=~s/\W//g;
 
-    my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
+    (undef,undef,undef,undef,undef,undef,my $clientmobile) =
+        &Apache::loncommon::decode_user_agent();
 
     my $iconpath= 
 	&Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
 
     my $lonhost = $r->dir_config('lonHostID');
     my $domain = &Apache::lonnet::default_login_domain();
+    my $defdom = $domain;
     if ($lonhost ne '') {
-        my $redirect = &check_loginvia($domain,$lonhost);
-        if ($redirect) {
-            $r->print($redirect);
-            return OK;
-        } 
+        unless ($sessiondata{'sessionserver'}) {
+            my $redirect = &check_loginvia($domain,$lonhost);
+            if ($redirect) {
+                $r->print($redirect);
+                return OK;
+            }
+        }
     }
 
-    if (($env{'form.domain'}) && 
+    if (($sessiondata{'domain'}) &&
+        (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
+        $domain=$sessiondata{'domain'};
+    } elsif (($env{'form.domain'}) && 
 	(&Apache::lonnet::domain($env{'form.domain'},'description'))) {
 	$domain=$env{'form.domain'};
     }
+
     my $role    = $r->dir_config('lonRole');
     my $loadlim = $r->dir_config('lonLoadLim');
     my $uloadlim= $r->dir_config('lonUserLoadLim');
@@ -141,9 +195,20 @@ sub handler {
     my $host_name = &Apache::lonnet::hostname($lonhost);
 
 # --------------------------------------------- Default values for login fields
-
-    my $authusername=($env{'form.username'}?$env{'form.username'}:'');
-    my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
+    
+    my ($authusername,$authdomain);
+    if ($sessiondata{'username'}) {
+        $authusername=$sessiondata{'username'};
+    } else {
+        $env{'form.username'} = &Apache::loncommon::cleanup_html($env{'form.username'});
+        $authusername=($env{'form.username'}?$env{'form.username'}:'');
+    }
+    if ($sessiondata{'domain'}) {
+        $authdomain=$sessiondata{'domain'};
+    } else {
+        $env{'form.domain'} = &Apache::loncommon::cleanup_html($env{'form.domain'});
+        $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
+    }
 
 # ---------------------------------------------------------- Determine own load
     my $loadavg;
@@ -197,6 +262,12 @@ sub handler {
         }
         $tokenextras .= '&symb='.&escape($env{'form.symb'});
     }
+    if ($env{'form.iptoken'}) {
+        if (!$tokenextras) {
+            $tokenextras = '&&';
+        }
+        $tokenextras .= '&iptoken='.&escape($env{'form.iptoken'});
+    }
     my $logtoken=Apache::lonnet::reply(
        'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,
        $lonhost);
@@ -318,11 +389,7 @@ lextkey=this.document.client.elements.le
 initkeys();
 
 this.document.server.elements.upass0.value
-    =crypted(this.document.client.elements.upass$now.value.substr(0,15));
-this.document.server.elements.upass1.value
-    =crypted(this.document.client.elements.upass$now.value.substr(15,15));
-this.document.server.elements.upass2.value
-    =crypted(this.document.client.elements.upass$now.value.substr(30,15));
+    =getCrypted(this.document.client.elements.upass$now.value);
 
 this.document.client.elements.uname.value='';
 this.document.client.elements.upass$now.value='';
@@ -353,6 +420,40 @@ ENDSCRIPT
 	       alink        => "$alink",
                onload       => 'javascript:enableInput();',);
 
+    my ($lonhost_in_use,$headextra,$headextra_exempt,@hosts,%defaultdomconf);
+    @hosts = &Apache::lonnet::current_machine_ids();
+    $lonhost_in_use = $lonhost;
+    if (@hosts > 1) {
+        foreach my $hostid (@hosts) {
+            if (&Apache::lonnet::host_domain($hostid) eq $defdom) {
+                $lonhost_in_use = $hostid;
+                last;
+            }
+        }
+    }
+    %defaultdomconf = &Apache::loncommon::get_domainconf($defdom);
+    $headextra = $defaultdomconf{$defdom.'.login.headtag_'.$lonhost_in_use};
+    $headextra_exempt = $defaultdomconf{$domain.'.login.headtag_exempt_'.$lonhost_in_use};
+    if ($headextra) {
+        my $omitextra;
+        if ($headextra_exempt ne '') {
+            my @exempt = split(',',$headextra_exempt);
+            my $ip = $ENV{'REMOTE_ADDR'};
+            if (grep(/^\Q$ip\E$/,@exempt)) {
+                $omitextra = 1;
+            }
+        }
+        unless ($omitextra) {
+            my $confname = $defdom.'-domainconfig';
+            if ($headextra =~ m{^\Q/res/$defdom/$confname/login/headtag/$lonhost_in_use/\E}) {
+                my $extra = &Apache::lonnet::getfile(&Apache::lonnet::filelocation("",$headextra));
+                unless ($extra eq '-1') {
+                    $js .= "\n".$extra."\n";
+                }
+            }
+        }
+    }
+
     $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
 			       { 'redirect'       => [$expire,'/adm/roles'], 
 				 'add_entries' => \%add_entries,
@@ -403,8 +504,6 @@ ENDSCRIPT
    <input type="hidden" name="serverid" value="$lonhost" />
    <input type="hidden" name="uname" value="" />
    <input type="hidden" name="upass0" value="" />
-   <input type="hidden" name="upass1" value="" />
-   <input type="hidden" name="upass2" value="" />
    <input type="hidden" name="udom" value="" />
    <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
    <input type="hidden" name="localres" value="$env{'form.localres'}" />
@@ -433,16 +532,20 @@ ENDSERVERFORM
                                        $authdomain,\$helpdeskscript,
                                        $showhelpdesk,\@possdoms);
 
+    my $mobileargs;
+    if ($clientmobile) {
+        $mobileargs = 'autocapitalize="off" autocorrect="off"'; 
+    }
     my $loginform=(<<LFORM);
 <form name="client" action="" onsubmit="return(send())">
   <input type="hidden" name="lextkey" value="$lextkey" />
   <input type="hidden" name="uextkey" value="$uextkey" />
   <b><label for="uname">$lt{'un'}</label>:</b><br />
-  <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" /><br />
+  <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" $mobileargs /><br />
   <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
   <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
   <b><label for="udom">$lt{'dom'}</label>:</b><br />
-  <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" /><br />
+  <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" $mobileargs /><br />
   <input type="submit" value="$lt{'log'}" />
 </form>
 LFORM
@@ -451,7 +554,7 @@ LFORM
         $r->print(<<HEADER);
 <!-- The LON-CAPA Header -->
 <div style="background:$pgbg;margin:0;width:100%;">
-  <img src="$img" border="0" alt="The Learning Online Network with CAPA" />
+  <img src="$img" border="0" alt="The Learning Online Network with CAPA" class="LC_maxwidth" />
 </div>
 HEADER
     }
@@ -475,7 +578,7 @@ HEADER
 <div>
 ENDTOP
     if ($showmainlogo) {
-        $r->print(' <img src="'.$logo.'" alt="" />'."\n");
+        $r->print(' <img src="'.$logo.'" alt="" class="LC_maxwidth" />'."\n");
     }
 $r->print(<<ENDTOP);
 $announcements
@@ -636,8 +739,10 @@ sub contactdisplay {
     my $requestmail = 
         &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
                                                  $authdomain,$origmail);
-    if ($showhelpdesk) {
-        unless ($requestmail =~ m/[^\@]+\@[^\@]+/) {
+    unless ($showhelpdesk eq '0') {
+        if ($requestmail =~ m/[^\@]+\@[^\@]+/) {
+            $showhelpdesk = 1;
+        } else {
             $showhelpdesk = 0;
         }
     }
@@ -652,7 +757,8 @@ sub contactdisplay {
 <script type="text/javascript">
 // <![CDATA[
 function helpdesk() {
-    var codedom = document.client.udom.value;
+    var possdom = document.client.udom.value;
+    var codedom = possdom.replace( new RegExp("[^A-Za-z0-9.\\-]","g"),'');
     if (codedom == '') {
         codedom = "$authdomain";
     }