--- loncom/auth/lonauth.pm	2022/08/30 12:10:43	1.121.2.24.2.5
+++ loncom/auth/lonauth.pm	2013/11/26 01:19:12	1.128
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # User Authentication Module
 #
-# $Id: lonauth.pm,v 1.121.2.24.2.5 2022/08/30 12:10:43 raeburn Exp $
+# $Id: lonauth.pm,v 1.128 2013/11/26 01:19:12 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -29,9 +29,11 @@
 package Apache::lonauth;
 
 use strict;
-use LONCAPA qw(:DEFAULT :match);
+use LONCAPA;
 use Apache::Constants qw(:common);
 use CGI qw(:standard);
+use DynaLoader; # for Crypt::DES version
+use Crypt::DES;
 use Apache::loncommon();
 use Apache::lonnet;
 use Apache::lonmenu();
@@ -40,13 +42,11 @@ use Fcntl qw(:flock);
 use Apache::lonlocal;
 use Apache::File();
 use HTML::Entities;
-use Digest::MD5;
-use CGI::Cookie();
  
 # ------------------------------------------------------------ Successful login
 sub success {
     my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
-	$form,$cid,$expirepub,$write_to_opener) = @_;
+	$form) = @_;
 
 # ------------------------------------------------------------ Get cookie ready
     my $cookie =
@@ -60,9 +60,8 @@ sub success {
 
 # -------------------------------------------------------------------- Log this
 
-    my $ip = &Apache::lonnet::get_requestor_ip();
     &Apache::lonnet::log($domain,$username,$authhost,
-                         "Login $ip");
+                         "Login $ENV{'REMOTE_ADDR'}");
 
 # ------------------------------------------------- Check for critical messages
 
@@ -73,27 +72,8 @@ sub success {
         }
     }
 
-# ------------------------------------------------------------ Get cookies ready
-    my ($securecookie,$defaultcookie);
-    my $ssl = $r->subprocess_env('https');
-    if ($ssl) {
-        $securecookie="lonSID=$cookie; path=/; HttpOnly; secure";
-        my $lonidsdir=$r->dir_config('lonIDsDir');
-        if (($lonidsdir) && (-e "$lonidsdir/$cookie.id")) {
-            my $linkname=substr(Digest::MD5::md5_hex(Digest::MD5::md5_hex(time(). {}. rand(). $$)), 0, 32).'_linked';
-            if (-e "$lonidsdir/$linkname.id") {
-                unlink("$lonidsdir/$linkname.id");
-            }
-            my $made_symlink = eval { symlink("$lonidsdir/$cookie.id",
-                                              "$lonidsdir/$linkname.id"); 1 };
-            if ($made_symlink) {
-                $defaultcookie = "lonLinkID=$linkname; path=/; HttpOnly;";
-                &Apache::lonnet::appenv({'user.linkedenv' => $linkname});
-            }
-        }
-    } else {
-        $defaultcookie = "lonID=$cookie; path=/; HttpOnly;";
-    }
+# ------------------------------------------------------------ Get cookie ready
+    $cookie="lonID=$cookie; path=/";
 # -------------------------------------------------------- Menu script and info
     my $destination = $lowerurl;
 
@@ -119,28 +99,20 @@ sub success {
     }
     if (defined($form->{symb})) {
         my $destsymb = $form->{symb};
-        my $encrypted;
-        if ($destsymb =~ m{^/enc/}) {
-            $encrypted = 1;
-            if ($cid) {
-                $destsymb = &Apache::lonenc::unencrypted($destsymb,$cid);
-            }
-        }
         $destination  .= ($destination =~ /\?/) ? '&' : '?';
         if ($destsymb =~ /___/) {
+            # FIXME Need to deal with encrypted symbs and urls as needed.
             my ($map,$resid,$desturl)=split(/___/,$destsymb);
-            $desturl = &Apache::lonnet::clutter($desturl);
-            if ($encrypted) {
-                $desturl = &Apache::lonenc::encrypted($desturl,1,$cid);
-                $destsymb = $form->{symb};
+            unless ($desturl=~/^(adm|editupload|public)/) {
+                $desturl = &Apache::lonnet::clutter($desturl);
             }
             $desturl = &HTML::Entities::encode($desturl,'"<>&');
             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
-            $destination .= 'destinationurl='.$desturl.
+            $destination .= '&destinationurl='.$desturl.
                             '&destsymb='.$destsymb;
-        } elsif (!$encrypted) {
+        } else {
             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
-            $destination .= 'destinationurl='.$destsymb;
+            $destination .= '&destinationurl='.$destsymb;
         }
     }
     if ($destination =~ m{^/adm/roles}) {
@@ -148,202 +120,85 @@ sub success {
         $destination .= 'source=login';
     }
 
+    my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
+    my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
     my $brcrum = [{'href' => '',
                    'text' => 'Successful Login'},];
-    my $args = {'no_inline_link' => 1,
-                'bread_crumbs' => $brcrum,};
-    if (($env{'request.deeplink.login'} eq $lowerurl) &&
-        (($env{'request.linkprot'}) || ($env{'request.linkkey'} ne ''))) {
-        my %info;
-        if ($env{'request.linkprot'}) {
-            $info{'linkprot'} = $env{'request.linkprot'};
-            foreach my $item ('linkprotuser','linkprotexit') {
-                if ($form->{$item}) {
-                    $info{$item} = $form->{$item};
-                }
-            }
-            $args = {'only_body' => 1,};
-        } elsif ($env{'request.linkkey'} ne '') {
-            $info{'linkkey'} = $env{'request.linkkey'};
-        }
-        $info{'origurl'} = $lowerurl;
-        my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'link');
-        unless (($token eq 'con_lost') || ($token eq 'refused') ||
-                ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
-            $destination .= (($destination =~ /\?/) ? '&' : '?') . 'ttoken='.$token;
-        }
-    }
-    if ($env{'request.deeplink.login'}) {
-        if ($env{'environment.remote'} eq 'on') {
-            &Apache::lonnet::appenv({'environment.remote' => 'off'});
-        }
-    }
-    my $startupremote;
-    if ($write_to_opener) {
-        if ($env{'environment.remote'} eq 'on') {
-            &Apache::lonnet::appenv({'environment.remote' => 'off'});
-        }
-        $args->{'redirect'} = [0,$destination,'',$write_to_opener];
-    } else {
-        $startupremote=&Apache::lonmenu::startupremote($destination);
-    }
-
-    my $windowinfo=&Apache::lonmenu::open($env{'browser.os'});
-    my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
-    my $setflags=&Apache::lonmenu::setflags();
-    my $maincall=&Apache::lonmenu::maincall();
     my $start_page=&Apache::loncommon::start_page('Successful Login',
-                                                  $startupremote,$args);
+                                                  $header,
+                                                  {'bread_crumbs' => $brcrum,});
     my $end_page  =&Apache::loncommon::end_page();
 
-    my $continuelink;
-    if ($env{'environment.remote'} eq 'off') {
-        unless ($write_to_opener) {
-	    $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
-        }
-    }
+	my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
 # ------------------------------------------------- Output for successful login
 
     &Apache::loncommon::content_type($r,'text/html');
-    if ($securecookie) {
-        $r->headers_out->add('Set-cookie' => $securecookie);
-    }
-    if ($defaultcookie) {
-        $r->headers_out->add('Set-cookie' => $defaultcookie);
-    }
-    if ($expirepub) {
-        my $c = new CGI::Cookie(-name    => 'lonPubID',
-                                -value   => '',
-                                -expires => '-10y',);
-        $r->headers_out->add('Set-cookie' => $c);
-    }
+    $r->header_out('Set-cookie' => $cookie);
     $r->send_http_header;
 
-    if ($env{'request.linkprot'}) {
-        $r->print(<<END);
-$start_page
-<br />$continuelink
-$end_page
-END
-    } else {
-        my %lt=&Apache::lonlocal::texthash(
-				           'wel' => 'Welcome',
-				           'pro' => 'Login problems?',
-				          );
-        my $loginhelp = &loginhelpdisplay($domain);
-        if ($loginhelp) {
-            $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
-        }
+    my %lt=&Apache::lonlocal::texthash(
+				       'wel' => 'Welcome',
+				       'pro' => 'Login problems?',
+				       );
+    my $loginhelp = &loginhelpdisplay($domain);
+    if ($loginhelp) {
+        $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
+    }
 
-        my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>'); 
-        $r->print(<<ENDSUCCESS);
+    my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>'); 
+    $r->print(<<ENDSUCCESS);
 $start_page
-$setflags
 $windowinfo
 <h1>$lt{'wel'}</h1>
 $welcome
 $loginhelp
-$remoteinfo
-$maincall
 $continuelink
 $end_page
 ENDSUCCESS
-    }
-    return;
 }
 
 # --------------------------------------------------------------- Failed login!
 
 sub failed {
-    my ($r,$message,$form,$authhost) = @_;
+    my ($r,$message,$form) = @_;
     (undef,undef,undef,my $clientmathml,my $clientunicode) =
         &Apache::loncommon::decode_user_agent();
     my $args = {};
     if ($clientunicode && !$clientmathml) {
         $args = {'browser.unicode' => 1};
     }
-    if ($form->{firsturl} =~ m{^/tiny/$match_domain/\w+$}) {
-        if ($form->{linkprot}) {
-            $args->{only_body} = 1;
-        }
-    }
 
     my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
-    my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
-    my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
-    if (&Apache::lonnet::domain($udom,'description') eq '') {
-        undef($udom);
-    }
-    my $retry = '/adm/login';
-    if ($uname eq $form->{'uname'}) {
-        $retry .= '?username='.$uname;
-    }
+    my $uname = $form->{'uname'};
+    my $udom;
+    if (&Apache::lonnet::domain($form->{'udom'},'description') ne '') {
+        $udom = $form->{'udom'};
+    }  
+    my $retry = '/adm/login?username='.$form->{'uname'};
     if ($udom) {
-        $retry .= (($retry=~/\?/)?'&amp;':'?').'domain='.$udom;
+        $retry .= '&amp;domain='.$form->{'udom'}
     }
-    my $lonhost = $r->dir_config('lonHostID');
-    my $querystr;
-    my $result = &set_retry_token($form,$lonhost,\$querystr);
-    if ($result eq 'fail') {
-        if (exists($form->{role})) {
-            my $role = &Apache::loncommon::cleanup_html($form->{role});
-            if ($role ne '') {
-                $retry .= (($retry=~/\?/)?'&amp;':'?').'role='.$role;
-            }
-        }
-        if (exists($form->{symb})) {
-            my $symb = &Apache::loncommon::cleanup_html($form->{symb});
-            if ($symb ne '') {
-                $retry .= (($retry=~/\?/)?'&amp;':'?').'symb='.$symb;
-            }
-        }
-        if (exists($form->{firsturl})) {
-            my $firsturl = &Apache::loncommon::cleanup_html($form->{firsturl});
-            if ($firsturl ne '') {
-                $retry .= (($retry=~/\?/)?'&amp;':'?').'firsturl='.$firsturl;
-                if ($form->{firsturl} =~ m{^/tiny/$match_domain/\w+$}) {
-                    unless (exists($form->{linkprot})) {
-                        if (exists($form->{linkkey})) {
-                            $retry .= 'linkkey='.$form->{linkkey};
-                        }
-                    }
-                }
-            }
-        }
-        if (exists($form->{linkprot})) {
-            my %info = (
-                         'linkprot' => $form->{'linkprot'},
-                       );
-            foreach my $item ('linkprotuser','linkprotexit') {
-                if ($form->{$item} ne '') {
-                    $info{$item} = $form->{$item};
-                }
-            }
-            my $ltoken = &Apache::lonnet::tmpput(\%info,
-                                                 $r->dir_config('lonHostID'),'retry');
-            if ($ltoken) {
-                $retry .= (($retry =~ /\?/) ? '&' : '?').'ltoken='.$ltoken;
-            }
-        }
-    } elsif ($querystr ne '') {
-        $retry .= (($retry=~/\?/)?'&amp;':'?').$querystr;
+    if (exists($form->{role})) {
+        $retry .= '&amp;role='.$form->{role};
+    }
+    if (exists($form->{symb})) {
+        $retry .= '&amp;symb='.$form->{symb};
     }
-    my $end_page = &Apache::loncommon::end_page();
+    my $end_page   = &Apache::loncommon::end_page();
     &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;
-    my @actions =
-         (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
     my $loginhelp = &loginhelpdisplay($udom);
     if ($loginhelp) {
-        push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
+        $loginhelp = '<p><a href="'.$loginhelp.'">'.&mt('Login problems?').'</a></p>';
     }
-    #FIXME: link to helpdesk might be added here
 
     $r->print(
        $start_page
-      .'<h2>'.&mt('Sorry ...').'</h2>'
-      .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
-      .&Apache::lonhtmlcommon::actionbox(\@actions)
+      .'<h1>'.&mt('Sorry ...').'</h1>'
+      .'<p class="LC_warning">'.&mt($message).'</p>'
+      .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')
+      .'</p>'
+      .$loginhelp
       .$end_page
     );
  }
@@ -364,6 +219,7 @@ sub reroute {
 sub handler {
     my $r = shift;
     my $londocroot = $r->dir_config('lonDocRoot');
+    my $form;
 # Are we re-routing?
     if (-e "$londocroot/lon-status/reroute.txt") {
 	&reroute($r);
@@ -389,76 +245,8 @@ sub handler {
 	    my $end_page = 
 	        &Apache::loncommon::end_page();
             my $dest = '/adm/roles';
-            my %form = &get_form_items($r);
-            if ($form{'logtoken'}) {
-                my $tmpinfo = &Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
-                                                     $form{'serverid'});
-                unless (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
-                        ($tmpinfo eq 'no_such_host')) {
-                    my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo);
-                    $firsturl = &unescape($firsturl);
-                    my %info;
-                    foreach my $item (@rest) {
-                        my ($key,$value) = split(/=/,$item);
-                        $info{$key} = &unescape($value);
-                    }
-                    if ($firsturl ne '') {
-                        $info{'firsturl'} = $firsturl;
-                        $dest = $firsturl;
-                        my $relogin;
-                        if ($dest =~ m{^/tiny/$match_domain/\w+$}) {
-                            if ($env{'request.course.id'}) {
-                                my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
-                                my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
-                                my $symb = &Apache::loncommon::symb_from_tinyurl($dest,$cnum,$cdom);
-                                if ($symb) {
-                                    unless (&set_deeplink_login(%info) eq 'ok') {
-                                        $relogin = 1;
-                                    }
-                                }
-                            }
-                            if ($relogin) {
-                                $r->print(
-                                      $start_page
-                                     .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
-                                     .'<p>'.&mt('Please [_1]log out[_2] first, and then try your access again',
-                                                '<a href="/adm/logout">','</a>')
-                                     .'</p>'
-                                     .$end_page);
-                            } else {
-                                if (($info{'linkprot'}) || ($info{'linkkey'} ne '')) {
-                                    if (($info{'linkprot'}) && ($info{'linkprotuser'} ne '')) {
-                                        unless ($info{'linkprotuser'} eq $env{'user.name'}.':'.$env{'user.domain'}) {
-                                            $r->print(
-                                                      $start_page
-                                                      .'<p class="LC_warning">'.&mt('You are already logged in, but as a different user from the one expected for the link you followed from another system').'</p>'
-                                                      .'<p>'.&mt('Please [_1]log out[_2] first, and then try following the link again from the other system',
-                                                                 '<a href="/adm/logout">','</a>')
-
-                                                      .'</p>'
-                                                      .$end_page);
-                                            return OK;
-                                        }
-                                    }
-                                    my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'link');
-                                    unless (($token eq 'con_lost') || ($token eq 'refused') ||
-                                            ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
-                                        $dest .= (($dest =~ /\?/) ? '&' : '?') . 'ttoken='.$token;
-                                    }
-                                }
-                                $r->print(
-                                      $start_page
-                                     .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
-                                     .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4] first, and then try your access again',
-                                                '<a href="'.$dest.'">','</a>',
-                                                '<a href="/adm/logout">','</a>')
-                                     .'</p>'
-                                     .$end_page);
-                            }
-                            return OK;
-                        }
-                    }
-                }
+            if ($env{'form.firsturl'} ne '') {
+                $dest = $env{'form.firsturl'};
             }
             $r->print(
                $start_page
@@ -474,7 +262,19 @@ sub handler {
 
 # ---------------------------------------------------- No valid token, continue
 
-    my %form = &get_form_items($r);
+
+    my $buffer;
+    if ($r->header_in('Content-length') > 0) {
+	$r->read($buffer,$r->header_in('Content-length'),0);
+    }
+    my %form;
+    foreach my $pair (split(/&/,$buffer)) {
+       my ($name,$value) = split(/=/,$pair);
+       $value =~ tr/+/ /;
+       $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+       $form{$name}=$value;
+    }
+
     if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
 	&failed($r,'Username, password and domain need to be specified.',
 		\%form);
@@ -483,11 +283,10 @@ sub handler {
 
 # split user logging in and "su"-user
 
-    ($form{'uname'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'});
+    ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
     $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
     $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
-    $form{'udom'}  = &LONCAPA::clean_domain($form{'udom'});
-    $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'});
+    $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});
 
     my $role   = $r->dir_config('lonRole');
     my $domain = $r->dir_config('lonDefDomain');
@@ -499,6 +298,12 @@ sub handler {
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
                                       $form{'serverid'});
 
+    my %sessiondata;
+    if ($form{'iptoken'}) {
+        %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
+        my $delete = &Apache::lonnet::tmpdel($form{'token'});
+    }
+
     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || 
         ($tmpinfo eq 'no_such_host')) {
 	&failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
@@ -518,16 +323,40 @@ sub handler {
         return OK;
     }
 
-    my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo);
-    $firsturl = &unescape($firsturl);
-    foreach my $item (@rest) {
-        my ($key,$value) = split(/=/,$item);
-        $form{$key} = &unescape($value);
+    my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
+    if ($rolestr) {
+        $rolestr = &unescape($rolestr);
+    }
+    if ($symbstr) {
+        $symbstr= &unescape($symbstr);
+    }
+    if ($rolestr =~ /^role=/) {
+        (undef,$form{'role'}) = split('=',$rolestr);
+    }
+    if ($symbstr =~ /^symb=/) { 
+        (undef,$form{'symb'}) = split('=',$symbstr);
+    }
+
+    my $keybin=pack("H16",$key);
+
+    my $cipher;
+    if ($Crypt::DES::VERSION>=2.03) {
+	$cipher=new Crypt::DES $keybin;
     }
-    if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) {
-        $form{'firsturl'} = $firsturl;
+    else {
+	$cipher=new DES $keybin;
+    }
+    my $upass='';
+    for (my $i=0;$i<=2;$i++) {
+	my $chunk=
+	    $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
+
+	$chunk.=
+	    $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
+
+	$chunk=substr($chunk,1,ord(substr($chunk,0,1)));
+	$upass.=$chunk;
     }
-    my $upass = &Apache::loncommon::des_decrypt($des_key,$form{'upass0'});
 
 # ---------------------------------------------------------------- Authenticate
 
@@ -548,33 +377,9 @@ sub handler {
 # --------------------------------------------------------------------- Failed?
 
     if ($authhost eq 'no_host') {
-        my $pwdverify;
-        if (&Apache::lonnet::homeserver($form{'uname'},$form{'udom'}) eq 'no_host') {
-            my %possunames = &alternate_unames_check($form{'uname'},$form{'udom'});
-            if (keys(%possunames) > 0) {
-                foreach my $rulematch (keys(%possunames)) {
-                    my $possuname = $possunames{$rulematch};
-                    if (($possuname ne '') && ($possuname =~ /^$match_username$/)) {
-                        $authhost=Apache::lonnet::authenticate($possuname,$upass,
-                                                               $form{'udom'},undef,
-                                                               $clientcancheckhost);
-                        if (($authhost eq 'no_host') || ($authhost eq 'no_account_on_host')) {
-                            next;
-                        } elsif (($authhost ne '') && (&Apache::lonnet::hostname($authhost) ne '')) {
-                            $pwdverify = 1;
-                            &Apache::lonnet::logthis("Authenticated user: $possuname was submitted as: $form{'uname'}");
-                            $form{'uname'} = $possuname;
-                            last;
-                        }
-                    }
-                }
-            }
-        }
-        unless ($pwdverify) {
-            &failed($r,'Username and/or password could not be authenticated.',
-                    \%form);
-            return OK;
-        }
+	&failed($r,'Username and/or password could not be authenticated.',
+		\%form);
+        return OK;
     } elsif ($authhost eq 'no_account_on_host') {
         if ($defaultauth) {
             my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
@@ -582,8 +387,7 @@ sub handler {
                 return OK;
             }
             my $start_page = 
-                &Apache::loncommon::start_page('Create a user account in LON-CAPA',
-                                               '',{'no_inline_link'   => 1,});
+                &Apache::loncommon::start_page('Create a user account in LON-CAPA');
             my $lonhost = $r->dir_config('lonHostID');
             my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
             my $contacts = 
@@ -613,10 +417,8 @@ sub handler {
 	$firsturl='/adm/roles';
     }
 
-    my ($hosthere,%sessiondata);
+    my $hosthere;
     if ($form{'iptoken'}) {
-        %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
-        my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
         if (($sessiondata{'domain'} eq $form{'udom'}) &&
             ($sessiondata{'username'} eq $form{'uname'})) {
             $hosthere = 1;
@@ -625,68 +427,20 @@ sub handler {
 
 # --------------------------------- Are we attempting to login as somebody else?
     if ($form{'suname'}) {
-        my ($suname,$sudom,$sudomref);
-        $suname = $form{'suname'};
-        $sudom = $form{'udom'};
-        if ($form{'sudom'}) {
-            unless ($sudom eq $form{'sudom'}) {
-                if (&Apache::lonnet::domain($form{'sudom'})) {
-                    $sudomref = [$form{'sudom'}];
-                    $sudom = $form{'sudom'};
-                }
-            }
-        }
 # ------------ see if the original user has enough privileges to pull this stunt
-	if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) {
+	if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
 # ---------------------------------------------------- see if the su-user exists
-	    unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') {
+	    unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
+		eq 'no_host') {
+		&Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
 # ------------------------------ see if the su-user is not too highly privileged
-		if (&Apache::lonnet::privileged($suname,$sudom)) {
-                    &Apache::lonnet::logthis('Attempted switch user to privileged user');
-                } else {
-                    my $noprivswitch;
-#
-# su-user's home server and user's home server must have one of:
-# (a) same domain
-# (b) same primary library server for the two domains
-# (c) same "internet domain" for primary library server(s) for home servers' domains
-#
-                    my $suprim = &Apache::lonnet::domain($sudom,'primary');
-                    my $suintdom = &Apache::lonnet::internet_dom($suprim);
-                    unless ($sudom eq $form{'udom'}) {
-                        my $uprim = &Apache::lonnet::domain($form{'udom'},'primary');
-                        my $uintdom = &Apache::lonnet::internet_dom($uprim);
-                        unless ($suprim eq $uprim) {
-                            unless ($suintdom eq $uintdom) {
-                                &Apache::lonnet::logthis('Attempted switch user '
-                                   .'to user with different "internet domain".');
-                                $noprivswitch = 1;
-                            }
-                        }
-                    }
-
-                    unless ($noprivswitch) {
-#
-# server where log-in occurs must have same "internet domain" as su-user's home
-# server
-#
-                        my $lonhost = $r->dir_config('lonHostID');
-                        my $hostintdom = &Apache::lonnet::internet_dom($lonhost);
-                        if ($hostintdom ne $suintdom) {
-                            &Apache::lonnet::logthis('Attempted switch user on a '
-                                .'server with a different "internet domain".');
-                        } else {
-
+		unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
 # -------------------------------------------------------- actually switch users
-
-			    &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.
-				$form{'udom'}.' logging in as '.$suname.':'.$sudom);
-			    $form{'uname'}=$suname;
-                            if ($form{'udom'} ne $sudom) {
-                                $form{'udom'}=$sudom;
-                            }
-                        }
-                    }
+		    &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
+			' logging in as '.$form{'suname'});
+		    $form{'uname'}=$form{'suname'};
+		} else {
+		    &Apache::lonnet::logthis('Attempted switch user to privileged user');
 		}
 	    }
 	} else {
@@ -694,76 +448,22 @@ sub handler {
 	}
     }
 
-    if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
-        if (($form{'linkprot'}) && ($form{'linkprotuser'} ne '')) {
-            unless($form{'linkprotuser'} eq $form{'uname'}.':'.$form{'udom'}) {
-                delete($form{'udom'});
-                delete($form{'uname'});
-                &failed($r,'Username and/or domain are different to that expected for the link you followed from another system',
-                        \%form,$authhost);
-                return OK;
-            }
-        }
-    }
-
     my ($is_balancer,$otherserver);
 
     unless ($hosthere) {
         ($is_balancer,$otherserver) =
-            &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
-        if ($is_balancer) {
-            # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
-            my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
-            if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
-                $otherserver = $found_server;
-            }
-            if ($otherserver eq '') {
-                my $lowest_load;
-                ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
-                if ($lowest_load > 100) {
-                    $otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$form{'udom'});
-                }
-            }
-            if ($otherserver ne '') {
-                my @hosts = &Apache::lonnet::current_machine_ids();
-                if (grep(/^\Q$otherserver\E$/,@hosts)) {
-                    $hosthere = $otherserver;
-                }
-            }
-        }
+            &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
     }
 
-    if (($is_balancer) && (!$hosthere)) {
+    if ($is_balancer) {
+        if (!$otherserver) { 
+            ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
+        }
         if ($otherserver) {
             &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                      \%form);
-            my $switchto = '/adm/switchserver?otherserver='.$otherserver;
-            if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
-                $switchto .= '&origurl='.$firsturl;
-            }
-            if ($form{'role'}) {
-                $switchto .= '&role='.$form{'role'};
-            }
-            if ($form{'symb'}) {
-                $switchto .= '&symb='.$form{'symb'};
-            }
-            if ($form{'linkprot'}) {
-                $env{'request.linkprot'} = $form{'linkprot'};
-                foreach my $item ('linkprotuser','linkprotexit') {
-                    if ($form{$item}) {
-                        $env{'request.'.$item} = $form{$item};
-                    }
-                }
-            } elsif ($form{'linkkey'} ne '') {
-                $env{'request.linkkey'} = $form{'linkkey'};
-            }
-            if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
-                &set_deeplink_login(%form);
-            }
-            $r->internal_redirect($switchto);
+	    $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
         } else {
-            &Apache::loncommon::content_type($r,'text/html');
-            $r->send_http_header;
             $r->print(&noswitch());
         }
         return OK;
@@ -773,33 +473,8 @@ sub handler {
             if ($otherserver) {
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                          \%form);
-                my $switchto = '/adm/switchserver?otherserver='.$otherserver;
-                if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
-                    $switchto .= '&origurl='.$firsturl;
-                }
-                if ($form{'role'}) {
-                    $switchto .= '&role='.$form{'role'};
-                }
-                if ($form{'symb'}) {
-                    $switchto .= '&symb='.$form{'symb'};
-                }
-                if ($form{'linkprot'}) {
-                    $env{'request.linkprot'} = $form{'linkprot'};
-                    foreach my $item ('linkprotuser','linkprotexit') {
-                        if ($form{$item}) {
-                            $env{'request.'.$item} = $form{$item};
-                        }
-                    }
-                } elsif ($form{'linkkey'} ne '') {
-                    $env{'request.linkkey'} = $form{'linkkey'};
-                }
-                if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
-                    &set_deeplink_login(%form);
-                }
-                $r->internal_redirect($switchto);
+                $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
             } else {
-                &Apache::loncommon::content_type($r,'text/html');
-                $r->send_http_header;
                 $r->print(&noswitch());
             }
             return OK;
@@ -820,175 +495,23 @@ sub handler {
 
 # ---------------------------------------------------------- Are we overloaded?
         if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
-            my $unloaded=Apache::lonnet::spareserver($r,$loadpercent,$userloadpercent,1,$form{'udom'});
+            my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
             if (!$unloaded) {
                 ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
             }
             if ($unloaded) {
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
                          undef,\%form);
-                if ($form{'linkprot'}) {
-                    $env{'request.linkprot'} = $form{'linkprot'};
-                } elsif ($form{'linkkey'} ne '') {
-                    $env{'request.linkkey'} = $form{'linkkey'};
-                }
-                if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
-                    &set_deeplink_login(%form);
-                }
                 $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
                 return OK;
             }
         }
-        if (($is_balancer) && ($hosthere)) {
-            $form{'noloadbalance'} = $hosthere;
-        }
-        my $extra_env;
-        if (($hosthere) && ($sessiondata{'sessionserver'} ne '')) {
-            if ($sessiondata{'origurl'} ne '') {
-                $firsturl = $sessiondata{'origurl'};
-                $form{'firsturl'} = $sessiondata{'origurl'};
-                my @names = ('role','symb','linkprot','linkkey');
-                foreach my $item (@names) {
-                    if ($sessiondata{$item} ne '') {
-                        $form{$item} = $sessiondata{$item};
-                    }
-                }
-            }
-        }
-        if ($form{'linkprot'}) {
-            my ($linkprotector,$uri) = split(/:/,$form{'linkprot'},2);
-            if ($linkprotector) {
-                $extra_env = {'user.linkprotector' => $linkprotector,
-                              'user.linkproturi'   => $uri};
-            }
-        } elsif ($form{'linkkey'} ne '') {
-            $extra_env = {'user.deeplinkkey'  => $form{'linkkey'},
-                          'user.keyedlinkuri' => $form{'firsturl'}};
-        }
-        if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
-            &set_deeplink_login(%form);
-            if ($form{'linkprot'}) {
-                if (ref($extra_env) eq 'HASH') {
-                    %{$extra_env} = ( %{$extra_env}, 'request.linkprot' => $form{'linkprot'} );
-                } else {
-                    $extra_env = {'request.linkprot' => $form{'linkprot'}};
-                }
-                if ($form{'linkprotexit'}) {
-                    $extra_env->{'request.linkprotexit'} = $form{'linkprotexit'};
-                }
-            } elsif ($form{'linkkey'} ne '') {
-                if (ref($extra_env) eq 'HASH') {
-                    %{$extra_env} = ( %{$extra_env}, 'request.linkkey' => $form{'linkkey'} );
-                } else {
-                    $extra_env = {'request.linkkey' => $form{'linkkey'}};
-                }
-            }
-            if ($env{'request.deeplink.login'}) {
-                if (ref($extra_env) eq 'HASH') {
-                    %{$extra_env} = ( %{$extra_env}, 'request.deeplink.login' => $form{'firsturl'} );
-                } else {
-                    $extra_env = {'request.deeplink.login' => $form{'firsturl'}};
-                }
-            }
-        }
-        &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,$extra_env,
+        &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
                  \%form);
         return OK;
     }
 }
 
-sub get_form_items {
-    my ($r) = @_;
-    my $buffer;
-    if ($r->header_in('Content-length') > 0) {
-        $r->read($buffer,$r->header_in('Content-length'),0);
-    }
-    my %form;
-    foreach my $pair (split(/&/,$buffer)) {
-       my ($name,$value) = split(/=/,$pair);
-       $value =~ tr/+/ /;
-       $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
-       $form{$name}=$value;
-    }
-    return %form;
-}
-
-sub set_deeplink_login {
-    my (%form) = @_;
-    my $disallow;
-    if ($form{'firsturl'} =~ m{^/tiny/($match_domain)/\w+$}) {
-        my $cdom = $1;
-        my ($cnum,$symb) = &Apache::loncommon::symb_from_tinyurl($form{'firsturl'},'',$cdom);
-        if ($symb) {
-            if ($env{'request.course.id'} eq $cdom.'_'.$cnum) {
-                my $deeplink;
-                if ($symb =~ /\.(page|sequence)$/) {
-                    my $mapname = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($symb))[2]);
-                    my $navmap = Apache::lonnavmaps::navmap->new();
-                    if (ref($navmap)) {
-                        $deeplink = $navmap->get_mapparam(undef,$mapname,'0.deeplink');
-                    }
-                } else {
-                    $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$symb);
-                }
-                if ($deeplink ne '') {
-                    my ($state,$others,$listed,$scope,$protect) = split(/,/,$deeplink);
-                    if (($protect ne 'none') && ($protect ne '')) {
-                        my ($acctype,$item) = split(/:/,$protect);
-                        if ($acctype =~ /lti(c|d)$/) {
-                            unless ($form{'linkprot'} eq $item.$1.':'.$env{'request.deeplink.login'}) {
-                                $disallow = 1;
-                            }
-                        } elsif ($acctype eq 'key') {
-                            unless ($form{'linkkey'} eq $item) {
-                                $disallow = 1;
-                            }
-                        }
-                    }
-                }
-                unless ($disallow) {
-                    $env{'request.deeplink.login'} = $form{'firsturl'};
-                }
-            } else {
-                $env{'request.deeplink.login'} = $form{'firsturl'};
-            }
-        }
-    }
-    if ($disallow) {
-        return;
-    }
-    return 'ok';
-}
-
-sub set_retry_token {
-    my ($form,$lonhost,$querystr) = @_;
-    if (ref($form) eq 'HASH') {
-        my ($firsturl,$token,$extras,@names);
-        @names = ('role','symb','linkprotuser','linkprotexit','linkprot','linkkey','iptoken');
-        foreach my $name (@names) {
-            if ($form->{$name} ne '') {
-                $extras .= '&'.$name.'='.&escape($form->{$name});
-                last if ($name eq 'linkprot');
-            }
-        }
-        my $firsturl = $form->{'firsturl'};
-        if (($firsturl ne '') || ($extras ne '')) {
-            $extras .= ':retry';
-            $token = &Apache::lonnet::reply('tmpput:'.&escape($firsturl).
-                                            $extras,$lonhost);
-            if (($token eq 'con_lost') || ($token eq 'no_such_host')) {
-                return 'fail';
-            } else {
-                if (ref($querystr)) {
-                    $$querystr = 'retry='.$token;
-                }
-                return 'ok';
-            }
-        }
-    }
-    return;
-}
-
 sub check_can_host {
     my ($r,$form,$authhost,$domdesc) = @_;
     return unless (ref($form) eq 'HASH');
@@ -1029,10 +552,7 @@ sub check_can_host {
             if ($login_host ne '') {
                 my $protocol = $Apache::lonnet::protocol{$login_host};
                 $protocol = 'http' if ($protocol ne 'https');
-                my $alias = &Apache::lonnet::use_proxy_alias($r,$login_host);
-                $hostname = $alias if ($alias ne '');
                 my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
-#FIXME Should preserve where user was going and linkprot by setting ltoken at $login_host
                 $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
                           '<h3>'.&mt('Account creation').'</h3>'.
                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
@@ -1049,14 +569,6 @@ sub check_can_host {
         } else {
             &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
                      $form);
-            if ($form->{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
-                $env{'request.deeplink.login'} = $form->{'firsturl'};
-            }
-            if ($form->{'linkprot'}) {
-                $env{'request.linkprot'} = $form->{'linkprot'};
-            } elsif ($form->{'linkkey'} ne '') {
-                $env{'request.linkkey'} = $form->{'linkkey'};
-            }
             my ($otherserver) = &Apache::lonnet::choose_server($udom);
             $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
         }
@@ -1100,20 +612,6 @@ sub loginhelpdisplay {
     return;
 }
 
-sub alternate_unames_check {
-    my ($uname,$udom) = @_;
-    my %possunames;
-    my %domdefs = &Apache::lonnet::get_domain_defaults($udom);
-    if (ref($domdefs{'unamemap_rule'}) eq 'ARRAY') {
-        if (@{$domdefs{'unamemap_rule'}} > 0) {
-            %possunames =
-                &Apache::lonnet::inst_rulecheck($udom,$uname,undef,
-                                                'unamemap',$domdefs{'unamemap_rule'});
-        }
-    }
-    return %possunames;
-}
-
 1;
 __END__