--- loncom/auth/lonauth.pm	2021/12/16 21:48:19	1.121.2.23
+++ loncom/auth/lonauth.pm	2022/02/27 02:57:35	1.121.2.24.2.3
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # User Authentication Module
 #
-# $Id: lonauth.pm,v 1.121.2.23 2021/12/16 21:48:19 raeburn Exp $
+# $Id: lonauth.pm,v 1.121.2.24.2.3 2022/02/27 02:57:35 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -29,7 +29,7 @@
 package Apache::lonauth;
 
 use strict;
-use LONCAPA;
+use LONCAPA qw(:DEFAULT :match);
 use Apache::Constants qw(:common);
 use CGI qw(:standard);
 use Apache::loncommon();
@@ -41,6 +41,7 @@ use Apache::lonlocal;
 use Apache::File();
 use HTML::Entities;
 use Digest::MD5;
+use CGI::Cookie();
  
 # ------------------------------------------------------------ Successful login
 sub success {
@@ -147,6 +148,27 @@ sub success {
         $destination .= 'source=login';
     }
 
+    if (($env{'request.deeplink.login'} eq $lowerurl) &&
+        (($env{'request.linkprot'}) || ($env{'request.linkkey'} ne ''))) {
+        my %info;
+        if ($env{'request.linkprot'}) {
+            $info{'linkprot'} = $env{'request.linkprot'};
+        } elsif ($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 $windowinfo=&Apache::lonmenu::open($env{'browser.os'});
     my $startupremote=&Apache::lonmenu::startupremote($destination);
     my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
@@ -250,6 +272,20 @@ sub failed {
             my $firsturl = &Apache::loncommon::cleanup_html($form->{firsturl});
             if ($firsturl ne '') {
                 $retry .= (($retry=~/\?/)?'&':'?').'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 $ltoken = &Apache::lonnet::tmpput({linkprot => $form->{'linkprot'}},
+                                                 $r->dir_config('lonHostID'),'retry');
+            if ($ltoken) {
+                $retry .= (($retry =~ /\?/) ? '&' : '?').'ltoken='.$ltoken;
             }
         }
     } elsif ($querystr ne '') {
@@ -332,6 +368,45 @@ sub handler {
                     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 '')) {
+                                    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>'
+                                     .$end_page);
+                            }
+                            return OK;
+                        }
                     }
                 }
             }
@@ -399,6 +474,9 @@ sub handler {
         my ($key,$value) = split(/=/,$item);
         $form{$key} = &unescape($value);
     }
+    if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) {
+        $form{'firsturl'} = $firsturl;
+    }
     my $upass = &Apache::loncommon::des_decrypt($des_key,$form{'upass0'});
 
 # ---------------------------------------------------------------- Authenticate
@@ -420,9 +498,33 @@ sub handler {
 # --------------------------------------------------------------------- Failed?
 
     if ($authhost eq 'no_host') {
-	&failed($r,'Username and/or password could not be authenticated.',
-		\%form);
-        return OK;
+        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($r,'Username and/or password could not be authenticated.',
+                    \%form);
+            return OK;
+        }
     } elsif ($authhost eq 'no_account_on_host') {
         if ($defaultauth) {
             my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
@@ -583,6 +685,14 @@ sub handler {
             if ($form{'symb'}) {
                 $switchto .= '&symb='.$form{'symb'};
             }
+            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);
+            }
             $r->internal_redirect($switchto);
         } else {
             &Apache::loncommon::content_type($r,'text/html');
@@ -606,6 +716,14 @@ sub handler {
                 if ($form{'symb'}) {
                     $switchto .= '&symb='.$form{'symb'};
                 }
+                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);
+                }
                 $r->internal_redirect($switchto);
             } else {
                 &Apache::loncommon::content_type($r,'text/html');
@@ -637,6 +755,14 @@ sub handler {
             if ($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='.$firsturl);
                 return OK;
             }
@@ -657,7 +783,40 @@ sub handler {
                 }
             }
         }
-        &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
+        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' => $form{'linkprot'}};
+                }
+            } elsif ($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,
                  \%form);
         return OK;
     }
@@ -679,11 +838,58 @@ sub get_form_items {
     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','iptoken');
+        @names = ('role','symb','linkprot','linkkey','iptoken');
         foreach my $name (@names) {
             if ($form->{$name} ne '') {
                 $extras .= '&'.$name.'='.&escape($form->{$name});
@@ -751,6 +957,7 @@ sub check_can_host {
                 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
                 $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
                           '<h3>'.&mt('Account creation').'</h3>'.
                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
@@ -767,6 +974,14 @@ sub check_can_host {
         } else {
             &success($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);
         }
@@ -810,6 +1025,20 @@ 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__