--- loncom/lonnet/perl/lonnet.pm	2019/04/24 01:44:46	1.1407
+++ loncom/lonnet/perl/lonnet.pm	2019/07/23 13:59:01	1.1413
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1407 2019/04/24 01:44:46 raeburn Exp $
+# $Id: lonnet.pm,v 1.1413 2019/07/23 13:59:01 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1082,6 +1082,19 @@ sub find_existing_session {
     return;
 }
 
+sub delusersession {
+    my ($lonid,$udom,$uname) = @_;
+    my $uprimary_id = &domain($udom,'primary');
+    my $uintdom = &internet_dom($uprimary_id);
+    my $intdom = &internet_dom($lonid);
+    my $serverhomedom = &host_domain($lonid);
+    if (($uintdom ne '') && ($uintdom eq $intdom)) {
+        return &reply(join(':','delusersession',
+                            map {&escape($_)} ($udom,$uname)),$lonid);
+    }
+    return;
+}
+
 # check if user's browser sent load balancer cookie and server still has session
 # and is not overloaded.
 sub check_for_balancer_cookie {
@@ -1252,6 +1265,9 @@ sub changepass {
     } elsif ($answer =~ "invalid_client") {
         &logthis("$server refused to change $uname in $udom password because ".
                  "it was a reset by e-mail originating from an invalid server.");
+    } elsif ($answer =~ "^prioruse") {
+       &logthis("$server refused to change $uname in $udom password because ".
+                "the password had been used before");
     }
     return $answer;
 }
@@ -2666,7 +2682,7 @@ sub get_domain_defaults {
     if (ref($domconfig{'coursecategories'}) eq 'HASH') {
         $domdefaults{'catauth'} = 'std';
         $domdefaults{'catunauth'} = 'std';
-        if ($domconfig{'coursecategories'}{'auth'}) { 
+        if ($domconfig{'coursecategories'}{'auth'}) {
             $domdefaults{'catauth'} = $domconfig{'coursecategories'}{'auth'};
         }
         if ($domconfig{'coursecategories'}{'unauth'}) {
@@ -2705,6 +2721,65 @@ sub get_domain_defaults {
     return %domdefaults;
 }
 
+sub get_dom_cats {
+    my ($dom) = @_;
+    return unless (&domain($dom));
+    my ($cats,$cached)=&is_cached_new('cats',$dom);
+    unless (defined($cached)) {
+        my %domconfig = &get_dom('configuration',['coursecategories'],$dom);
+        if (ref($domconfig{'coursecategories'}) eq 'HASH') {
+            if (ref($domconfig{'coursecategories'}{'cats'}) eq 'HASH') {
+                %{$cats} = %{$domconfig{'coursecategories'}{'cats'}};
+            } else {
+                $cats = {};
+            }
+        } else {
+            $cats = {};
+        }
+        &Apache::lonnet::do_cache_new('cats',$dom,$cats,3600);
+    }
+    return $cats;
+}
+
+sub get_dom_instcats {
+    my ($dom) = @_;
+    return unless (&domain($dom));
+    my ($instcats,$cached)=&is_cached_new('instcats',$dom);
+    unless (defined($cached)) {
+        my (%coursecodes,%codes,@codetitles,%cat_titles,%cat_order);
+        my $totcodes = &retrieve_instcodes(\%coursecodes,$dom);
+        if ($totcodes > 0) {
+            my $caller = 'global';
+            if (&auto_instcode_format($caller,$dom,\%coursecodes,\%codes,
+                                      \@codetitles,\%cat_titles,\%cat_order) eq 'ok') {
+                $instcats = {
+                                codes => \%codes,
+                                codetitles => \@codetitles,
+                                cat_titles => \%cat_titles,
+                                cat_order => \%cat_order,
+                            };
+                &do_cache_new('instcats',$dom,$instcats,3600);
+            }
+        }
+    }
+    return $instcats;
+}
+
+sub retrieve_instcodes {
+    my ($coursecodes,$dom) = @_;
+    my $totcodes;
+    my %courses = &courseiddump($dom,'.',1,'.','.','.',undef,undef,'Course');
+    foreach my $course (keys(%courses)) {
+        if (ref($courses{$course}) eq 'HASH') {
+            if ($courses{$course}{'inst_code'} ne '') {
+                $$coursecodes{$course} = $courses{$course}{'inst_code'};
+                $totcodes ++;
+            }
+        }
+    }
+    return $totcodes;
+}
+
 sub course_portal_url {
     my ($cnum,$cdom) = @_;
     my $chome = &homeserver($cnum,$cdom);
@@ -8080,8 +8155,34 @@ sub allowed {
 
     if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
        =~/\Q$priv\E\&([^\:]*)/) {
-        unless (($priv eq 'bro') && (!$ownaccess)) {
-            $thisallowed.=$1;
+        if ($priv eq 'mip') {
+            my $rem = $1;
+            if (($uri ne '') && ($env{'request.course.id'} eq $uri) &&
+                ($env{'course.'.$env{'request.course.id'}.'.internal.courseowner'} eq $env{'user.name'}.':'.$env{'user.domain'})) {
+                my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                if ($cdom ne '') {
+                    my %passwdconf = &get_passwdconf($cdom);
+                    if (ref($passwdconf{'crsownerchg'}) eq 'HASH') {
+                        if (ref($passwdconf{'crsownerchg'}{'by'}) eq 'ARRAY') {
+                            if (@{$passwdconf{'crsownerchg'}{'by'}}) {
+                                my @inststatuses = split(':',$env{'environment.inststatus'});
+                                unless (@inststatuses) {
+                                    @inststatuses = ('default');
+                                }
+                                foreach my $status (@inststatuses) {
+                                    if (grep(/^\Q$status\E$/,@{$passwdconf{'crsownerchg'}{'by'}})) {
+                                        $thisallowed.=$rem;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        } else {
+            unless (($priv eq 'bro') && (!$ownaccess)) {
+                $thisallowed.=$1;
+            }
         }
     }
 
@@ -8170,6 +8271,16 @@ sub allowed {
 
     if ($env{'request.course.id'}) {
 
+# If this is modifying password (internal auth) domains must match for user and user's role.
+
+        if ($priv eq 'mip') {
+            if ($env{'user.domain'} eq $env{'request.role.domain'}) {
+                return $thisallowed;
+            } else {
+                return '';
+            }
+        }
+
        $courseprivid=$env{'request.course.id'};
        if ($env{'request.course.sec'}) {
           $courseprivid.='/'.$env{'request.course.sec'};
@@ -10074,7 +10185,22 @@ sub store_coowners {
 sub modifyuserauth {
     my ($udom,$uname,$umode,$upass)=@_;
     my $uhome=&homeserver($uname,$udom);
-    unless (&allowed('mau',$udom)) { return 'refused'; }
+    my $allowed;
+    if (&allowed('mau',$udom)) {
+        $allowed = 1;
+    } elsif (($umode eq 'internal') && ($udom eq $env{'user.domain'}) &&
+             ($env{'request.course.id'}) && (&allowed('mip',$env{'request.course.id'})) &&
+             (!$env{'course.'.$env{'request.course.id'}.'.internal.nopasswdchg'})) {
+        my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+        my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+        if (($cdom ne '') && ($cnum ne '')) {
+            my $is_owner = &is_course_owner($cdom,$cnum);
+            if ($is_owner) {
+                $allowed = 1;
+            }
+        }
+    }
+    unless ($allowed) { return 'refused'; }
     &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
              $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
              ' in domain '.$env{'request.role.domain'});