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Diff for /loncom/lond between versions 1.489.2.19 and 1.570

-version 1.489.2.19, 2016/08/06 20:05:01
+version 1.570, 2021/12/20 03:13:29
  Line 15
  #
  # LON-CAPA is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  # GNU General Public License for more details.
  #
- Line 36  use LONCAPA;
+ Line 35  use LONCAPA;
  use LONCAPA::Configuration;
  use LONCAPA::Lond;
+ use Socket;
  use IO::Socket;
  use IO::File;
  #use Apache::File;
  use POSIX;
  use Crypt::IDEA;
- use LWP::UserAgent();
+ use HTTP::Request;
  use Digest::MD5 qw(md5_hex);
  use GDBM_File;
  use Authen::Krb5;
  Line 55  use LONCAPA::lonssl;
  use Fcntl qw(:flock);
  use Apache::lonnet;
  use Mail::Send;
+ use Crypt::Eksblowfish::Bcrypt;
+ use Digest::SHA;
+ use Encode;
+ use LONCAPA::LWPReq;
  my $DEBUG = 0;		       # Non zero to enable debug log entries.
- Line 71  my $clientip;   # IP address of client.
+ Line 75  my $clientip;   # IP address of client.
  my $clientname;			# LonCAPA name of client.
  my $clientversion;              # LonCAPA version running on client.
  my $clienthomedom;              # LonCAPA domain of homeID for client.
-                                 # primary library server.
+ my $clientintdom;               # LonCAPA "internet domain" for client.
+ my $clientsamedom;              # LonCAPA domain same for this host
+                                 # and client.
+ my $clientsameinst;             # LonCAPA "internet domain" same for
+                                 # this host and client.
+ my $clientremoteok;             # Current domain permits hosting on client
+                                 # (not set if host and client share "internet domain").
+                                 # Values are 0 or 1; 1 if allowed.
+ my %clientprohibited;           # Commands from client prohibited for domain's
+                                 # users.
  my $server;
- Line 93  my %managers;   # Ip -> manager names
+ Line 106  my %managers;   # Ip -> manager names
  my %perlvar;			# Will have the apache conf defined perl vars.
+ my %secureconf;                 # Will have requirements for security
+                                 # of lond connections
+ my %crlchecked;                 # Will contain clients for which the client's SSL
+                                 # has been checked against the cluster's Certificate
+                                 # Revocation List.
  my $dist;
  #
- Line 142  my @installerrors = ("ok",
+ Line 162  my @installerrors = ("ok",
  		     );
  #
+ # The %trust hash classifies commands according to type of trust
+ # required for execution of the command.
+ #
+ # When clients from a different institution request execution of a
+ # particular command, the trust settings for that institution set
+ # for this domain (or default domain for a multi-domain server) will
+ # be checked to see if running the command is allowed.
+ #
+ # Trust types which depend on the "Trust" domain configuration
+ # for the machine's default domain are:
+ #
+ # content   ("Access to this domain's content by others")
+ # shared    ("Access to other domain's content by this domain")
+ # enroll    ("Enrollment in this domain's courses by others")
+ # coaurem   ("Co-author roles for this domain's users elsewhere")
+ # othcoau   ("Co-author roles in this domain for others")
+ # domroles  ("Domain roles in this domain assignable to others")
+ # catalog   ("Course Catalog for this domain displayed elsewhere")
+ # reqcrs    ("Requests for creation of courses in this domain by others")
+ # msg       ("Users in other domains can send messages to this domain")
+ #
+ # Trust type which depends on the User Session Hosting (remote)
+ # domain configuration for machine's default domain is: "remote".
+ #
+ # Trust types which depend on contents of manager.tab in
+ # /home/httpd/lonTabs is: "manageronly".
+ #
+ # Trust type which requires client to share the same LON-CAPA
+ # "internet domain" (i.e., same institution as this server) is:
+ # "institutiononly".
+ #
+ my %trust = (
+                auth => {remote => 1},
+                autocreatepassword => {remote => 1},
+                autocrsreqchecks => {remote => 1, reqcrs => 1},
+                autocrsrequpdate => {remote => 1},
+                autocrsreqvalidation => {remote => 1},
+                autogetsections => {remote => 1},
+                autoinstcodedefaults => {remote => 1, catalog => 1},
+                autoinstcodeformat => {remote => 1, catalog => 1},
+                autonewcourse => {remote => 1, reqcrs => 1},
+                autophotocheck => {remote => 1, enroll => 1},
+                autophotochoice => {remote => 1},
+                autophotopermission => {remote => 1, enroll => 1},
+                autopossibleinstcodes => {remote => 1, reqcrs => 1},
+                autoretrieve => {remote => 1, enroll => 1, catalog => 1},
+                autorun => {remote => 1, enroll => 1, reqcrs => 1},
+                autovalidateclass_sec => {catalog => 1},
+                autovalidatecourse => {remote => 1, enroll => 1},
+                autovalidateinstcode => {domroles => 1, remote => 1, enroll => 1},
+                autovalidateinstcrosslist => {remote => 1, enroll => 1},
+                autoinstsecreformat => {remote => 1, enroll => 1},
+                changeuserauth => {remote => 1, domroles => 1},
+                chatretr => {remote => 1, enroll => 1},
+                chatsend => {remote => 1, enroll => 1},
+                courseiddump => {remote => 1, domroles => 1, enroll => 1},
+                courseidput => {remote => 1, domroles => 1, enroll => 1},
+                courseidputhash => {remote => 1, domroles => 1, enroll => 1},
+                courselastaccess => {remote => 1, domroles => 1, enroll => 1},
+                coursesessions => {institutiononly => 1},
+                currentauth => {remote => 1, domroles => 1, enroll => 1},
+                currentdump => {remote => 1, enroll => 1},
+                currentversion => {remote=> 1, content => 1},
+                dcmaildump => {remote => 1, domroles => 1},
+                dcmailput => {remote => 1, domroles => 1},
+                del => {remote => 1, domroles => 1, enroll => 1, content => 1},
+                delbalcookie => {institutiononly => 1},
+                delusersession => {institutiononly => 1},
+                deldom => {remote => 1, domroles => 1}, # not currently used
+                devalidatecache => {institutiononly => 1},
+                domroleput => {remote => 1, enroll => 1},
+                domrolesdump => {remote => 1, catalog => 1},
+                du => {remote => 1, enroll => 1},
+                du2 => {remote => 1, enroll => 1},
+                dump => {remote => 1, enroll => 1, domroles => 1},
+                edit => {institutiononly => 1},  #not used currently
+                edump => {remote => 1, enroll => 1, domroles => 1},
+                eget => {remote => 1, domroles => 1, enroll => 1}, #not used currently
+                egetdom => {remote => 1, domroles => 1, enroll => 1, },
+                ekey => {anywhere => 1},
+                exit => {anywhere => 1},
+                fetchuserfile => {remote => 1, enroll => 1},
+                get => {remote => 1, domroles => 1, enroll => 1},
+                getdom => {anywhere => 1},
+                home => {anywhere => 1},
+                iddel => {remote => 1, enroll => 1},
+                idget => {remote => 1, enroll => 1},
+                idput => {remote => 1, domroles => 1, enroll => 1},
+                inc => {remote => 1, enroll => 1},
+                init => {anywhere => 1},
+                inst_usertypes => {remote => 1, domroles => 1, enroll => 1},
+                instemailrules => {remote => 1, domroles => 1},
+                instidrulecheck => {remote => 1, domroles => 1,},
+                instidrules => {remote => 1, domroles => 1,},
+                instrulecheck => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
+                instselfcreatecheck => {institutiononly => 1},
+                instuserrules => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
+                keys => {remote => 1,},
+                load => {anywhere => 1},
+                log => {anywhere => 1},
+                ls => {remote => 1, enroll => 1, content => 1,},
+                ls2 => {remote => 1, enroll => 1, content => 1,},
+                ls3 => {remote => 1, enroll => 1, content => 1,},
+                makeuser => {remote => 1, enroll => 1, domroles => 1,},
+                mkdiruserfile => {remote => 1, enroll => 1,},
+                newput => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1,},
+                passwd => {remote => 1},
+                ping => {anywhere => 1},
+                pong => {anywhere => 1},
+                pushfile => {manageronly => 1},
+                put => {remote => 1, enroll => 1, domroles => 1, msg => 1, content => 1, shared => 1},
+                putdom => {remote => 1, domroles => 1,},
+                putstore => {remote => 1, enroll => 1},
+                queryreply => {anywhere => 1},
+                querysend => {anywhere => 1},
+                querysend_activitylog => {remote => 1},
+                querysend_allusers => {remote => 1, domroles => 1},
+                querysend_courselog => {remote => 1},
+                querysend_fetchenrollment => {remote => 1},
+                querysend_getinstuser => {remote => 1},
+                querysend_getmultinstusers => {remote => 1},
+                querysend_instdirsearch => {remote => 1, domroles => 1, coaurem => 1},
+                querysend_institutionalphotos => {remote => 1},
+                querysend_portfolio_metadata => {remote => 1, content => 1},
+                querysend_userlog => {remote => 1, domroles => 1},
+                querysend_usersearch => {remote => 1, enroll => 1, coaurem => 1},
+                quit => {anywhere => 1},
+                readlonnetglobal => {institutiononly => 1},
+                reinit => {manageronly => 1}, #not used currently
+                removeuserfile => {remote => 1, enroll => 1},
+                renameuserfile => {remote => 1,},
+                restore => {remote => 1, enroll => 1, reqcrs => 1,},
+                rolesdel => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
+                rolesput => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
+                servercerts => {institutiononly => 1},
+                serverdistarch => {anywhere => 1},
+                serverhomeID => {anywhere => 1},
+                serverloncaparev => {anywhere => 1},
+                servertimezone => {remote => 1, enroll => 1},
+                setannounce => {remote => 1, domroles => 1},
+                sethost => {anywhere => 1},
+                store => {remote => 1, enroll => 1, reqcrs => 1,},
+                studentphoto => {remote => 1, enroll => 1},
+                sub => {content => 1,},
+                tmpdel => {institutiononly => 1},
+                tmpget => {institutiononly => 1},
+                tmpput => {remote => 1, othcoau => 1},
+                tokenauthuserfile => {anywhere => 1},
+                unsub => {content => 1,},
+                update => {shared => 1},
+                updatebalcookie => {institutiononly => 1},
+                updateclickers => {remote => 1},
+                userhassession => {anywhere => 1},
+                userload => {anywhere => 1},
+                version => {anywhere => 1}, #not used
+             );
+ #
  #   Statistics that are maintained and dislayed in the status line.
  #
  my $Transactions = 0;		# Number of attempted transactions.
- Line 254  sub SSLConnection {
+ Line 433  sub SSLConnection {
      Debug("Approving promotion -> ssl");
      #  And do so:
+     my $CRLFile;
+     unless ($crlchecked{$clientname}) {
+         $CRLFile = lonssl::CRLFile();
+         $crlchecked{$clientname} = 1;
+     }
      my $SSLSocket = lonssl::PromoteServerSocket($Socket,
  						$CACertificate,
  						$Certificate,
- 						$KeyFile);
+ 						$KeyFile,
+ 						$clientname,
+                                                 $CRLFile,
+                                                 $clientversion);
      if(! ($SSLSocket) ) {	# SSL socket promotion failed.
  	my $err = lonssl::LastError();
  	&logthis("<font color=\"red\"> CRITICAL "
- Line 297  sub InsecureConnection {
+ Line 485  sub InsecureConnection {
      my $Socket  =  shift;
      #   Don't even start if insecure connections are not allowed.
+     #   return 0 if Insecure connections not allowed.
-     if(! $perlvar{londAllowInsecure}) {	# Insecure connections not allowed.
+     #
+     if (ref($secureconf{'connfrom'}) eq 'HASH') {
+         if ($clientsamedom) {
+             if ($secureconf{'connfrom'}{'dom'} eq 'req') {
+                 return 0;
+             }
+         } elsif ($clientsameinst) {
+             if ($secureconf{'connfrom'}{'intdom'} eq 'req') {
+                 return 0;
+             }
+         } else {
+             if ($secureconf{'connfrom'}{'other'} eq 'req') {
+                 return 0;
+             }
+         }
+     } elsif (!$perlvar{londAllowInsecure}) {
  	return 0;
      }
- Line 598  sub ConfigFileFromSelector {
+ Line 801  sub ConfigFileFromSelector {
      my $selector   = shift;
      my $tablefile;
-     my $tabledir = $perlvar{'lonTabDir'}.'/';
+     if ($selector eq 'loncapaCAcrl') {
-     if (($selector eq "hosts") || ($selector eq "domain") ||
+         my $tabledir = $perlvar{'lonCertificateDirectory'};
-         ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
+         if (-d $tabledir) {
- 	$tablefile =  $tabledir.$selector.'.tab';
+             $tablefile =  $tabledir.'/'.$selector.'.pem';
+         }
+     } else {
+         my $tabledir = $perlvar{'lonTabDir'}.'/';
+         if (($selector eq "hosts") || ($selector eq "domain") ||
+             ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
+ 	    $tablefile =  $tabledir.$selector.'.tab';
+         }
      }
      return $tablefile;
  }
- Line 625  sub PushFile {
+ Line 835  sub PushFile {
      my ($command, $filename, $contents) = split(":", $request, 3);
      &Debug("PushFile");
-     #  At this point in time, pushes for only the following tables are
+     #  At this point in time, pushes for only the following tables and
-     #  supported:
+     #  CRL file are supported:
      #   hosts.tab  ($filename eq host).
      #   domain.tab ($filename eq domain).
      #   dns_hosts.tab ($filename eq dns_host).
      #   dns_domain.tab ($filename eq dns_domain).
+     #   loncapaCAcrl.pem ($filename eq loncapaCAcrl).
      # Construct the destination filename or reject the request.
      #
      # lonManage is supposed to ensure this, however this session could be
- Line 651  sub PushFile {
+ Line 862  sub PushFile {
      if($filename eq "host") {
  	$contents = AdjustHostContents($contents);
-     } elsif ($filename eq 'dns_host' || $filename eq 'dns_domain') {
+     } elsif (($filename eq 'dns_host') || ($filename eq 'dns_domain') ||
+              ($filename eq 'loncapaCAcrl')) {
          if ($contents eq '') {
              &logthis('<font color="red"> Pushfile: unable to install '
                      .$tablefile." - no data received from push. </font>");
- Line 662  sub PushFile {
+ Line 874  sub PushFile {
              if ($managers{$clientip} eq $clientname) {
                  my $clientprotocol = $Apache::lonnet::protocol{$clientname};
                  $clientprotocol = 'http' if ($clientprotocol ne 'https');
-                 my $url = '/adm/'.$filename;
+                 my $url;
-                 $url =~ s{_}{/};
+                 if ($filename eq 'loncapaCAcrl') {
-                 my $ua=new LWP::UserAgent;
+                     $url = '/adm/dns/loncapaCRL';
-                 $ua->timeout(60);
+                 } else {
+                     $url = '/adm/'.$filename;
+                     $url =~ s{_}{/};
+                 }
                  my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
-                 my $response=$ua->request($request);
+                 my $response = LONCAPA::LWPReq::makerequest($clientname,$request,'',\%perlvar,60,0);
                  if ($response->is_error()) {
                      &logthis('<font color="red"> Pushfile: unable to install '
                              .$tablefile." - error attempting to pull data. </font>");
- Line 1422  sub du2_handler {
+ Line 1637  sub du2_handler {
  #    selected directory the filename followed by the full output of
  #    the stat function is returned.  The returned info for each
  #    file are separated by ':'.  The stat fields are separated by &'s.
+ #
+ #    If the requested path contains /../ or is:
+ #
+ #    1. for a directory, and the path does not begin with one of:
+ #        (a) /home/httpd/html/res/<domain>
+ #        (b) /home/httpd/html/userfiles/
+ #        (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
+ #    or is:
+ #
+ #    2. for a file, and the path (after prepending) does not begin with one of:
+ #        (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
+ #        (b) /home/httpd/html/res/<domain>/<username>/
+ #        (c) /home/httpd/html/userfiles/<domain>/<username>/
+ #
+ #    the response will be "refused".
+ #
  # Parameters:
  #    $cmd        - The command that dispatched us (ls).
  #    $ulsdir     - The directory path to list... I'm not sure what this
- Line 1443  sub ls_handler {
+ Line 1674  sub ls_handler {
      my $rights;
      my $ulsout='';
      my $ulsfn;
+     if ($ulsdir =~m{/\.\./}) {
+         &Failure($client,"refused\n",$userinput);
+         return 1;
+     }
      if (-e $ulsdir) {
  	if(-d $ulsdir) {
+             unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
+                     ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
+                 &Failure($client,"refused\n",$userinput);
+                 return 1;
+             }
  	    if (opendir(LSDIR,$ulsdir)) {
  		while ($ulsfn=readdir(LSDIR)) {
  		    undef($obs);
- Line 1468  sub ls_handler {
+ Line 1708  sub ls_handler {
  		closedir(LSDIR);
  	    }
  	} else {
+             unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
+                     ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) {
+                 &Failure($client,"refused\n",$userinput);
+                 return 1;
+             }
  	    my @ulsstats=stat($ulsdir);
  	    $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
  	}
- Line 1492  sub ls_handler {
+ Line 1737  sub ls_handler {
  #    selected directory the filename followed by the full output of
  #    the stat function is returned.  The returned info for each
  #    file are separated by ':'.  The stat fields are separated by &'s.
+ #
+ #    If the requested path contains /../ or is:
+ #
+ #    1. for a directory, and the path does not begin with one of:
+ #        (a) /home/httpd/html/res/<domain>
+ #        (b) /home/httpd/html/userfiles/
+ #        (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
+ #    or is:
+ #
+ #    2. for a file, and the path (after prepending) does not begin with one of:
+ #        (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
+ #        (b) /home/httpd/html/res/<domain>/<username>/
+ #        (c) /home/httpd/html/userfiles/<domain>/<username>/
+ #
+ #    the response will be "refused".
+ #
  # Parameters:
  #    $cmd        - The command that dispatched us (ls).
  #    $ulsdir     - The directory path to list... I'm not sure what this
- Line 1512  sub ls2_handler {
+ Line 1773  sub ls2_handler {
      my $rights;
      my $ulsout='';
      my $ulsfn;
+     if ($ulsdir =~m{/\.\./}) {
+         &Failure($client,"refused\n",$userinput);
+         return 1;
+     }
      if (-e $ulsdir) {
          if(-d $ulsdir) {
+             unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
+                     ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
+                 &Failure($client,"refused\n","$userinput");
+                 return 1;
+             }
              if (opendir(LSDIR,$ulsdir)) {
                  while ($ulsfn=readdir(LSDIR)) {
                      undef($obs);
- Line 1538  sub ls2_handler {
+ Line 1808  sub ls2_handler {
                  closedir(LSDIR);
              }
          } else {
+             unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
+                     ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) {
+                 &Failure($client,"refused\n",$userinput);
+                 return 1;
+             }
              my @ulsstats=stat($ulsdir);
              $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
          }
- Line 1554  sub ls2_handler {
+ Line 1829  sub ls2_handler {
  #    selected directory the filename followed by the full output of
  #    the stat function is returned.  The returned info for each
  #    file are separated by ':'.  The stat fields are separated by &'s.
+ #
+ #    If the requested path (after prepending) contains /../ or is:
+ #
+ #    1. for a directory, and the path does not begin with one of:
+ #        (a) /home/httpd/html/res/<domain>
+ #        (b) /home/httpd/html/userfiles/
+ #        (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
+ #        (d) /home/httpd/html/priv/<domain> and client is the homeserver
+ #
+ #    or is:
+ #
+ #    2. for a file, and the path (after prepending) does not begin with one of:
+ #        (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
+ #        (b) /home/httpd/html/res/<domain>/<username>/
+ #        (c) /home/httpd/html/userfiles/<domain>/<username>/
+ #        (d) /home/httpd/html/priv/<domain>/<username>/ and client is the homeserver
+ #
+ #    the response will be "refused".
+ #
  # Parameters:
  #    $cmd        - The command that dispatched us (ls).
  #    $tail       - The tail of the request that invoked us.
- Line 1593  sub ls3_handler {
+ Line 1887  sub ls3_handler {
      }
      my $dir_root = $perlvar{'lonDocRoot'};
-     if ($getpropath) {
+     if (($getpropath) || ($getuserdir)) {
          if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
              $dir_root = &propath($udom,$uname);
              $dir_root =~ s/\/$//;
          } else {
-             &Failure($client,"refused\n","$cmd:$tail");
+             &Failure($client,"refused\n",$userinput);
-             return 1;
-         }
-     } elsif ($getuserdir) {
-         if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
-             my $subdir=$uname.'__';
-             $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
-             $dir_root = $Apache::lonnet::perlvar{'lonUsersDir'}
-                        ."/$udom/$subdir/$uname";
-         } else {
-             &Failure($client,"refused\n","$cmd:$tail");
              return 1;
          }
      } elsif ($alternate_root ne '') {
- Line 1621  sub ls3_handler {
+ Line 1905  sub ls3_handler {
              $ulsdir = $dir_root.'/'.$ulsdir;
          }
      }
+     if ($ulsdir =~m{/\.\./}) {
+         &Failure($client,"refused\n",$userinput);
+         return 1;
+     }
+     my $islocal;
+     my @machine_ids = &Apache::lonnet::current_machine_ids();
+     if (grep(/^\Q$clientname\E$/,@machine_ids)) {
+         $islocal = 1;
+     }
      my $obs;
      my $rights;
      my $ulsout='';
      my $ulsfn;
+     my ($crscheck,$toplevel,$currdom,$currnum,$skip);
+     unless ($islocal) {
+         my ($major,$minor) = split(/\./,$clientversion);
+         if (($major < 2) || ($major == 2 && $minor < 12)) {
+             $crscheck = 1;
+         }
+     }
      if (-e $ulsdir) {
          if(-d $ulsdir) {
-             if (opendir(LSDIR,$ulsdir)) {
+             unless (($getpropath) || ($getuserdir) ||
+                     ($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
+                     ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles}) ||
+                     (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain}) && ($islocal))) {
+                 &Failure($client,"refused\n",$userinput);
+                 return 1;
+             }
+             if (($crscheck) &&
+                 ($ulsdir =~ m{^/home/httpd/html/res/($LONCAPA::match_domain)(/?$|/$LONCAPA::match_courseid)})) {
+                 ($currdom,my $posscnum) = ($1,$2);
+                 if (($posscnum eq '') || ($posscnum eq '/')) {
+                     $toplevel = 1;
+                 } else {
+                     $posscnum =~ s{^/+}{};
+                     if (&LONCAPA::Lond::is_course($currdom,$posscnum)) {
+                         $skip = 1;
+                     }
+                 }
+             }
+             if ((!$skip) && (opendir(LSDIR,$ulsdir))) {
                  while ($ulsfn=readdir(LSDIR)) {
+                     if (($crscheck) && ($toplevel) && ($currdom ne '') &&
+                         ($ulsfn =~ /^$LONCAPA::match_courseid$/) && (-d "$ulsdir/$ulsfn")) {
+                         if (&LONCAPA::Lond::is_course($currdom,$ulsfn)) {
+                             next;
+                         }
+                     }
                      undef($obs);
                      undef($rights);
                      my @ulsstats=stat($ulsdir.'/'.$ulsfn);
- Line 1651  sub ls3_handler {
+ Line 1977  sub ls3_handler {
                  closedir(LSDIR);
              }
          } else {
+             unless (($getpropath) || ($getuserdir) ||
+                     ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
+                     ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/}) ||
+                     (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain/$LONCAPA::match_name/}) && ($islocal))) {
+                 &Failure($client,"refused\n",$userinput);
+                 return 1;
+             }
              my @ulsstats=stat($ulsdir);
              $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
          }
- Line 1674  sub read_lonnet_global {
+ Line 2007  sub read_lonnet_global {
                        );
      my %limit_to = (
                      perlvar => {
-                                  lonOtherAuthen => 1,
+                                  lonOtherAuthen  => 1,
-                                  lonBalancer    => 1,
+                                  lonBalancer     => 1,
-                                  lonVersion     => 1,
+                                  lonVersion      => 1,
-                                  lonSysEMail    => 1,
+                                  lonAdmEMail     => 1,
-                                  lonHostID      => 1,
+                                  lonSupportEMail => 1,
-                                  lonRole        => 1,
+                                  lonSysEMail     => 1,
-                                  lonDefDomain   => 1,
+                                  lonHostID       => 1,
-                                  lonLoadLim     => 1,
+                                  lonRole         => 1,
-                                  lonUserLoadLim => 1,
+                                  lonDefDomain    => 1,
+                                  lonLoadLim      => 1,
+                                  lonUserLoadLim  => 1,
                                 }
                    );
      if (ref($requested) eq 'HASH') {
- Line 1701  sub read_lonnet_global {
+ Line 2036  sub read_lonnet_global {
                  }
                  if ($what eq 'perlvar') {
                      if (!exists($packagevars{$what}{'lonBalancer'})) {
-                         if ($dist =~ /^(centos|rhes|fedora|scientific)/) {
+                         if ($dist =~ /^(centos|rhes|fedora|scientific|oracle|rocky|alma)/) {
                              my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
                              if (ref($othervarref) eq 'HASH') {
                                  $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
- Line 1794  sub server_distarch_handler {
+ Line 2129  sub server_distarch_handler {
  }
  &register_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
+ sub server_certs_handler {
+     my ($cmd,$tail,$client) = @_;
+     my $userinput = "$cmd:$tail";
+     my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
+     my $result = &LONCAPA::Lond::server_certs(\%perlvar,$perlvar{'lonHostID'},$hostname);
+     &Reply($client,\$result,$userinput);
+     return;
+ }
+ &register_handler("servercerts", \&server_certs_handler, 0, 1, 0);
  #   Process a reinit request.  Reinit requests that either
  #   lonc or lond be reinitialized so that an updated
  #   host.tab or domain.tab can be processed.
- Line 1926  sub authenticate_handler {
+ Line 2271  sub authenticate_handler {
                  my ($remote,$hosted);
                  my $remotesession = &get_usersession_config($udom,'remotesession');
                  if (ref($remotesession) eq 'HASH') {
-                     $remote = $remotesession->{'remote'}
+                     $remote = $remotesession->{'remote'};
                  }
                  my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
                  if (ref($hostedsession) eq 'HASH') {
                      $hosted = $hostedsession->{'hosted'};
                  }
-                 my $loncaparev = $clientversion;
-                 if ($loncaparev eq '') {
-                     $loncaparev = $Apache::lonnet::loncaparevs{$clientname};
-                 }
                  $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
-                                                              $loncaparev,
+                                                              $clientversion,
                                                               $remote,$hosted);
              }
          }
- Line 2013  sub change_password_handler {
+ Line 2354  sub change_password_handler {
      }
      if($validated) {
  	my $realpasswd  = &get_auth_type($udom, $uname); # Defined since authd.
  	my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
+         my $notunique;
  	if ($howpwd eq 'internal') {
  	    &Debug("internal auth");
- 	    my $salt=time;
+             my $ncpass = &hash_passwd($udom,$npass);
- 	    $salt=substr($salt,6,2);
+             my (undef,$method,@rest) = split(/!/,$contentpwd);
- 	    my $ncpass=crypt($npass,$salt);
+             if ($method eq 'bcrypt') {
- 	    if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
+                 my %passwdconf = &Apache::lonnet::get_passwdconf($udom);
+                 if (($passwdconf{'numsaved'}) && ($passwdconf{'numsaved'} =~ /^\d+$/)) {
+                     my @oldpasswds;
+                     my $userpath = &propath($udom,$uname);
+                     my $fullpath = $userpath.'/oldpasswds';
+                     if (-d $userpath) {
+                         my @oldfiles;
+                         if (-e $fullpath) {
+                             if (opendir(my $dir,$fullpath)) {
+                                 (@oldfiles) = grep(/^\d+$/,readdir($dir));
+                                 closedir($dir);
+                             }
+                             if (@oldfiles) {
+                                 @oldfiles = sort { $b <=> $a } (@oldfiles);
+                                 my $numremoved = 0;
+                                 for (my $i=0; $i<@oldfiles; $i++) {
+                                     if ($i>=$passwdconf{'numsaved'}) {
+                                         if (-f "$fullpath/$oldfiles[$i]") {
+                                             if (unlink("$fullpath/$oldfiles[$i]")) {
+                                                 $numremoved ++;
+                                             }
+                                         }
+                                     } elsif (open(my $fh,'<',"$fullpath/$oldfiles[$i]")) {
+                                         while (my $line = <$fh>) {
+                                             push(@oldpasswds,$line);
+                                         }
+                                         close($fh);
+                                     }
+                                 }
+                                 if ($numremoved) {
+                                     &logthis("unlinked $numremoved old password files for $uname:$udom");
+                                 }
+                             }
+                         }
+                         push(@oldpasswds,$contentpwd);
+                         foreach my $item (@oldpasswds) {
+                             my (undef,$method,@rest) = split(/!/,$item);
+                             if ($method eq 'bcrypt') {
+                                 my $result = &hash_passwd($udom,$npass,@rest);
+                                 if ($result eq $item) {
+                                     $notunique = 1;
+                                     last;
+                                 }
+                             }
+                         }
+                         unless ($notunique) {
+                             unless (-e $fullpath) {
+                                 if (&mkpath("$fullpath/")) {
+                                     chmod(0700,$fullpath);
+                                 }
+                             }
+                             if (-d $fullpath) {
+                                 my $now = time;
+                                 if (open(my $fh,'>',"$fullpath/$now")) {
+                                     print $fh $contentpwd;
+                                     close($fh);
+                                     chmod(0400,"$fullpath/$now");
+                                 }
+                             }
+                         }
+                     }
+                 }
+             }
+             if ($notunique) {
+                 my $msg="Result of password change for $uname:$udom - password matches one used before";
+                 if ($lonhost) {
+                     $msg .= " - request originated from: $lonhost";
+                 }
+                 &logthis($msg);
+                 &Reply($client, "prioruse\n", $userinput);
+ 	    } elsif (&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
  		my $msg="Result of password change for $uname: pwchange_success";
                  if ($lonhost) {
                      $msg .= " - request originated from: $lonhost";
                  }
                  &logthis($msg);
+                 &update_passwd_history($uname,$udom,$howpwd,$context);
  		&Reply($client, "ok\n", $userinput);
  	    } else {
  		&logthis("Unable to open $uname passwd "
- Line 2034  sub change_password_handler {
+ Line 2446  sub change_password_handler {
  	    }
  	} elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
  	    my $result = &change_unix_password($uname, $npass);
+             if ($result eq 'ok') {
+                 &update_passwd_history($uname,$udom,$howpwd,$context);
+             }
  	    &logthis("Result of password change for $uname: ".
  		     $result);
  	    &Reply($client, \$result, $userinput);
- Line 2044  sub change_password_handler {
+ Line 2459  sub change_password_handler {
  	    #
  	    &Failure( $client, "auth_mode_error\n", $userinput);
  	}
      } else {
  	if ($failure eq '') {
  	    $failure = 'non_authorized';
- Line 2056  sub change_password_handler {
+ Line 2470  sub change_password_handler {
  }
  &register_handler("passwd", \&change_password_handler, 1, 1, 0);
+ sub hash_passwd {
+     my ($domain,$plainpass,@rest) = @_;
+     my ($salt,$cost);
+     if (@rest) {
+         $cost = $rest[0];
+         # salt is first 22 characters, base-64 encoded by bcrypt
+         my $plainsalt = substr($rest[1],0,22);
+         $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt);
+     } else {
+         my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
+         my $defaultcost = $domdefaults{'intauth_cost'};
+         if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
+             $cost = 10;
+         } else {
+             $cost = $defaultcost;
+         }
+         # Generate random 16-octet base64 salt
+         $salt = "";
+         $salt .= pack("C", int rand(256)) for 1..16;
+     }
+     my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({
+         key_nul => 1,
+         cost    => $cost,
+         salt    => $salt,
+     }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass)));
+     my $result = join("!", "", "bcrypt", sprintf("%02d",$cost),
+                 &Crypt::Eksblowfish::Bcrypt::en_base64($salt).
+                 &Crypt::Eksblowfish::Bcrypt::en_base64($hash));
+     return $result;
+ }
  #
  #   Create a new user.  User in this case means a lon-capa user.
  #   The user must either already exist in some authentication realm
- Line 2099  sub add_user_handler {
+ Line 2545  sub add_user_handler {
  		    ."makeuser";
  	    }
  	    unless ($fperror) {
- 		my $result=&make_passwd_file($uname,$udom,$umode,$npass, $passfilename);
+ 		my $result=&make_passwd_file($uname,$udom,$umode,$npass,
+                                              $passfilename,'makeuser');
  		&Reply($client,\$result, $userinput);     #BUGBUG - could be fail
  	    } else {
  		&Failure($client, \$fperror, $userinput);
- Line 2168  sub change_authentication_handler {
+ Line 2615  sub change_authentication_handler {
  		my $result = &change_unix_password($uname, $npass);
  		&logthis("Result of password change for $uname: ".$result);
  		if ($result eq "ok") {
+                     &update_passwd_history($uname,$udom,$umode,'changeuserauth');
  		    &Reply($client, \$result);
  		} else {
  		    &Failure($client, \$result);
  		}
  	    } else {
- 		my $result=&make_passwd_file($uname,$udom,$umode,$npass,$passfilename);
+ 		my $result=&make_passwd_file($uname,$udom,$umode,$npass,
+                                              $passfilename,'changeuserauth');
  		#
  		#  If the current auth mode is internal, and the old auth mode was
  		#  unix, or krb*,  and the user is an author for this domain,
- Line 2194  sub change_authentication_handler {
+ Line 2643  sub change_authentication_handler {
  }
  &register_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
+ sub update_passwd_history {
+     my ($uname,$udom,$umode,$context) = @_;
+     my $proname=&propath($udom,$uname);
+     my $now = time;
+     if (open(my $fh,">>$proname/passwd.log")) {
+         print $fh "$now:$umode:$context\n";
+         close($fh);
+     }
+     return;
+ }
  #
  #   Determines if this is the home server for a user.  The home server
  #   for a user will have his/her lon-capa passwd file.  Therefore all we need
- Line 2275  sub update_resource_handler {
+ Line 2735  sub update_resource_handler {
  		my $transname="$fname.in.transfer";
  		my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
  		my $response;
- # FIXME: cannot replicate files that take more than two minutes to transfer?
+ # FIXME: cannot replicate files that take more than two minutes to transfer -- needs checking now 1200s timeout used
- #		alarm(120);
+ # for LWP request.
- # FIXME: this should use the LWP mechanism, not internal alarms.
+ 		my $request=new HTTP::Request('GET',"$remoteurl");
-                 alarm(1200);
+                 $response=&LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,0,1);
- 		{
- 		    my $ua=new LWP::UserAgent;
- 		    my $request=new HTTP::Request('GET',"$remoteurl");
- 		    $response=$ua->request($request,$transname);
- 		}
- 		alarm(0);
  		if ($response->is_error()) {
- # FIXME: we should probably clean up here instead of just whine
+                     my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
- 		    unlink($transname);
+                     &devalidate_meta_cache($fname);
+                     if (-e $transname) {
+                         unlink($transname);
+                     }
+                     unlink($fname);
  		    my $message=$response->status_line;
  		    &logthis("LWP GET: $message for $fname ($remoteurl)");
  		} else {
  		    if ($remoteurl!~/\.meta$/) {
- # FIXME: isn't there an internal LWP mechanism for this?
+ 			my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
- 			alarm(120);
+                         my $mresponse = &LONCAPA::LWPReq::makerequest($clientname,$mrequest,$fname.'.meta',\%perlvar,120,0,1);
- 			{
+ 			if ($mresponse->is_error()) {
- 			    my $ua=new LWP::UserAgent;
+ 			    unlink($fname.'.meta');
- 			    my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
- 			    my $mresponse=$ua->request($mrequest,$fname.'.meta');
- 			    if ($mresponse->is_error()) {
- 				unlink($fname.'.meta');
- 			    }
  			}
- 			alarm(0);
  		    }
                      # we successfully transfered, copy file over to real name
  		    rename($transname,$fname);
- Line 2372  sub fetch_user_file_handler {
+ Line 2824  sub fetch_user_file_handler {
  	my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
  	my $response;
  	Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
- 	alarm(120);
+ 	my $request=new HTTP::Request('GET',"$remoteurl");
- 	{
+         my $verifycert = 1;
- 	    my $ua=new LWP::UserAgent;
+         my @machine_ids = &Apache::lonnet::current_machine_ids();
- 	    my $request=new HTTP::Request('GET',"$remoteurl");
+         if (grep(/^\Q$clientname\E$/,@machine_ids)) {
- 	    $response=$ua->request($request,$transname);
+             $verifycert = 0;
- 	}
+         }
- 	alarm(0);
+         $response = &LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,$verifycert);
  	if ($response->is_error()) {
  	    unlink($transname);
  	    my $message=$response->status_line;
- Line 2445  sub remove_user_file_handler {
+ Line 2897  sub remove_user_file_handler {
  	    if (-e $file) {
  		#
  		#   If the file is a regular file unlink is fine...
  		#   However it's possible the client wants a dir
- 		#   removed, in which case rmdir is more appropriate
+ 		#   removed, in which case rmdir is more appropriate.
- 	        #   Note: rmdir will only remove an empty directory.
+ 		#   Note: rmdir will only remove an empty directory.
  		#
  	        if (-f $file){
  		    unlink($file);
                      # for html files remove the associated .bak file
                      # which may have been created by the editor.
                      if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) {
                          my $path = $1;
- Line 2587  sub user_has_session_handler {
+ Line 3039  sub user_has_session_handler {
  }
  &register_handler("userhassession", \&user_has_session_handler, 0,1,0);
+ sub del_usersession_handler {
+     my ($cmd, $tail, $client) = @_;
+     my $result;
+     my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
+     if (($udom =~ /^$LONCAPA::match_domain$/) && ($uname =~ /^$LONCAPA::match_username$/)) {
+         my $lonidsdir = $perlvar{'lonIDsDir'};
+         if (-d $lonidsdir) {
+             if (opendir(DIR,$lonidsdir)) {
+                 my $filename;
+                 while ($filename=readdir(DIR)) {
+                     if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/) {
+                         if (tie(my %oldenv,'GDBM_File',"$lonidsdir/$filename",
+                                 &GDBM_READER(),0640)) {
+                             my $linkedfile;
+                             if (exists($oldenv{'user.linkedenv'})) {
+                                 $linkedfile = $oldenv{'user.linkedenv'};
+                             }
+                             untie(%oldenv);
+                             $result = unlink("$lonidsdir/$filename");
+                             if ($result) {
+                                 if ($linkedfile =~ /^[a-f0-9]+_linked$/) {
+                                     if (-l "$lonidsdir/$linkedfile.id") {
+                                         unlink("$lonidsdir/$linkedfile.id");
+                                     }
+                                 }
+                             }
+                         } else {
+                             $result = unlink("$lonidsdir/$filename");
+                         }
+                         last;
+                     }
+                 }
+             }
+         }
+         if ($result == 1) {
+             &Reply($client, "$result\n", "$cmd:$tail");
+         } else {
+             &Reply($client, "not_found\n", "$cmd:$tail");
+         }
+     } else {
+         &Failure($client, "invalid_user\n", "$cmd:$tail");
+     }
+     return 1;
+ }
+ &register_handler("delusersession", \&del_usersession_handler, 0,1,0);
  #
  #  Authenticate access to a user file by checking that the token the user's
  #  passed also exists in their session file
- Line 2825  sub newput_user_profile_entry {
+ Line 3325  sub newput_user_profile_entry {
                  &logthis("error: ".($!+0)." untie (GDBM) failed ".
                           "while attempting newput - early out as key exists");
              }
- 	    &Failure($client, "key_exists: ".$key."\n",$userinput);
+             &Failure($client, "key_exists: ".$key."\n",$userinput);
- 	    return 1;
+             return 1;
  	}
      }
- Line 3076  sub get_profile_entry {
+ Line 3576  sub get_profile_entry {
  #
  #  Parameters:
  #     $cmd               - Command keyword of request (eget).
- #     $tail              - Tail of the command.  See GetProfileEntry
#                          for more information about this.
+ #     $tail              - Tail of the command.  See GetProfileEntry
+ #                          for more information about this.
  #     $client            - File open on the client.
  #  Returns:
  #     1      - Continue processing
- Line 3228  sub get_profile_keys {
+ Line 3729  sub get_profile_keys {
  sub dump_profile_database {
      my ($cmd, $tail, $client) = @_;
+     my $res = LONCAPA::Lond::dump_profile_database($tail);
+     if ($res =~ /^error:/) {
+         Failure($client, \$res, "$cmd:$tail");
+     } else {
+         Reply($client, \$res, "$cmd:$tail");
+     }
+     return 1;
+     #TODO remove
      my $userinput = "$cmd:$tail";
      my ($udom,$uname,$namespace) = split(/:/,$tail);
- Line 3307  sub dump_with_regexp {
+ Line 3819  sub dump_with_regexp {
      my ($cmd, $tail, $client) = @_;
      my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
      if ($res =~ /^error:/) {
-         &Failure($client, \$res, "$cmd:$tail");
+         Failure($client, \$res, "$cmd:$tail");
      } else {
-         &Reply($client, \$res, "$cmd:$tail");
+         Reply($client, \$res, "$cmd:$tail");
      }
      return 1;
  }
  &register_handler("dump", \&dump_with_regexp, 0, 1, 0);
+ #
+ #  Process the encrypted dump request. Original call should
+ #  be from lonnet::dump() with seventh arg ($encrypt) set to
+ #  1, to ensure that both request and response are encrypted.
+ #
+ #  Parameters:
+ #     $cmd               - Command keyword of request (edump).
+ #     $tail              - Tail of the command.
+ #                          See &dump_with_regexp for more
+ #                          information about this.
+ #     $client            - File open on the client.
+ #  Returns:
+ #     1      - Continue processing
+ #     0      - server should exit.
+ #
+ sub encrypted_dump_with_regexp {
+     my ($cmd, $tail, $client) = @_;
+     my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
+     if ($res =~ /^error:/) {
+         Failure($client, \$res, "$cmd:$tail");
+     } else {
+         if ($cipher) {
+             my $cmdlength=length($res);
+             $res.="         ";
+             my $encres='';
+             for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
+                 $encres.= unpack("H16",
+                                  $cipher->encrypt(substr($res,
+                                                          $encidx,
+)));
+             }
+             &Reply( $client,"enc:$cmdlength:$encres\n","$cmd:$tail");
+         } else {
+             &Failure( $client, "error:no_key\n","$cmd:$tail");
+         }
+     }
+ }
+ &register_handler("edump", \&encrypted_dump_with_regexp, 0, 1, 0);
  #  Store a set of key=value pairs associated with a versioned name.
  #
  #  Parameters:
- Line 3349  sub store_handler {
+ Line 3902  sub store_handler {
      my ($cmd, $tail, $client) = @_;
      my $userinput = "$cmd:$tail";
      chomp($tail);
      my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
      if ($namespace ne 'roles') {
- Line 3379  sub store_handler {
+ Line 3931  sub store_handler {
                      $numtrans =~ s/D//g;
                  }
              }
  	    $hashref->{"version:$rid"}++;
  	    my $version=$hashref->{"version:$rid"};
  	    my $allkeys='';
- Line 3396  sub store_handler {
+ Line 3947  sub store_handler {
                  if ($numtrans) {
                      $msg = 'delay:'.$numtrans;
                  }
-                 &Reply($client, "$msg\n", $userinput);
+ 		&Reply($client, "$msg\n", $userinput);
  	    } else {
  		&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
  			"while attempting store\n", $userinput);
- Line 3639  sub retrieve_chat_handler {
+ Line 4190  sub retrieve_chat_handler {
  #  serviced.
  #
  #  Parameters:
- #     $cmd       - COmmand keyword that initiated the request.
+ #     $cmd       - Command keyword that initiated the request.
  #     $tail      - Remainder of the command after the keyword.
  #                  For this function, this consists of a query and
  #                  3 arguments that are self-documentingly labelled
- Line 3653  sub retrieve_chat_handler {
+ Line 4204  sub retrieve_chat_handler {
  sub send_query_handler {
      my ($cmd, $tail, $client) = @_;
      my $userinput = "$cmd:$tail";
      my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
      $query=~s/\n*$//g;
+     if (($query eq 'usersearch') || ($query eq 'instdirsearch')) {
+         my $usersearchconf = &get_usersearch_config($currentdomainid,'directorysrch');
+         my $earlyout;
+         if (ref($usersearchconf) eq 'HASH') {
+             if ($currentdomainid eq $clienthomedom) {
+                 if ($query eq 'usersearch') {
+                     if ($usersearchconf->{'lcavailable'} eq '0') {
+                         $earlyout = 1;
+                     }
+                 } else {
+                     if ($usersearchconf->{'available'} eq '0') {
+                         $earlyout = 1;
+                     }
+                 }
+             } else {
+                 if ($query eq 'usersearch') {
+                     if ($usersearchconf->{'lclocalonly'}) {
+                         $earlyout = 1;
+                     }
+                 } else {
+                     if ($usersearchconf->{'localonly'}) {
+                         $earlyout = 1;
+                     }
+                 }
+             }
+         }
+         if ($earlyout) {
+             &Reply($client, "query_not_authorized\n");
+             return 1;
+         }
+     }
      &Reply($client, "". &sql_reply("$clientname\&$query".
  				"\&$arg1"."\&$arg2"."\&$arg3")."\n",
  	  $userinput);
- Line 3913  sub put_course_id_hash_handler {
+ Line 4494  sub put_course_id_hash_handler {
  #
  #                 domcloner - flag to indicate if user can create CCs in course's domain.
  #                             If so, ability to clone course is automatic.
  #                 hasuniquecode - filter by courses for which a six character unique code has
  #                                 been set.
  #
  #     $client  - The socket open on the client.
- Line 3923  sub put_course_id_hash_handler {
+ Line 4504  sub put_course_id_hash_handler {
  #   a reply is written to $client.
  sub dump_course_id_handler {
      my ($cmd, $tail, $client) = @_;
+     my $res = LONCAPA::Lond::dump_course_id_handler($tail);
+     if ($res =~ /^error:/) {
+         Failure($client, \$res, "$cmd:$tail");
+     } else {
+         Reply($client, \$res, "$cmd:$tail");
+     }
+     return 1;
+     #TODO remove
      my $userinput = "$cmd:$tail";
      my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
- Line 4327  sub course_lastaccess_handler {
+ Line 4919  sub course_lastaccess_handler {
  }
  &register_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
+ sub course_sessions_handler {
+     my ($cmd, $tail, $client) = @_;
+     my $userinput = "$cmd:$tail";
+     my ($cdom,$cnum,$lastactivity) = split(':',$tail);
+     my $dbsuffix = '_'.$cdom.'_'.$cnum.'.db';
+     my (%sessions,$qresult);
+     my $now=time;
+     if (opendir(DIR,$perlvar{'lonIDsDir'})) {
+         my $filename;
+         while ($filename=readdir(DIR)) {
+             next if ($filename=~/^\./);
+             next if ($filename=~/^publicuser_/);
+             next if ($filename=~/^[a-f0-9]+_(linked|lti_\d+)\.id$/);
+             if ($filename =~ /^($LONCAPA::match_username)_\d+_($LONCAPA::match_domain)_/) {
+                 my ($uname,$udom) = ($1,$2);
+                 next unless (-e "$perlvar{'lonDaemons'}/tmp/$uname$dbsuffix");
+                 my $mtime = (stat("$perlvar{'lonIDsDir'}/$filename"))[9];
+                 if ($lastactivity < 0) {
+                     next if ($mtime-$now > $lastactivity);
+                 } else {
+                     next if ($now-$mtime > $lastactivity);
+                 }
+                 $sessions{$uname.':'.$udom} = $mtime;
+             }
+         }
+         closedir(DIR);
+     }
+     foreach my $user (keys(%sessions)) {
+         $qresult.=&escape($user).'='.$sessions{$user}.'&';
+     }
+     if ($qresult) {
+         chop($qresult);
+     }
+     &Reply($client, \$qresult, $userinput);
+     return 1;
+ }
+ &register_handler("coursesessions",\&course_sessions_handler, 0, 1, 0);
  #
  # Puts an unencrypted entry in a namespace db file at the domain level
  #
- Line 4370  sub put_domain_handler {
+ Line 5000  sub put_domain_handler {
  }
  &register_handler("putdom", \&put_domain_handler, 0, 1, 0);
+ # Updates one or more entries in clickers.db file at the domain level
+ #
+ # Parameters:
+ #    $cmd      - The command that got us here.
+ #    $tail     - Tail of the command (remaining parameters).
+ #                In this case a colon separated list containing:
+ #                (a) the domain for which we are updating the entries,
+ #                (b) the action required -- add or del -- and
+ #                (c) a &-separated list of entries to add or delete.
+ #    $client   - File descriptor connected to client.
+ # Returns
+ #     1        - Continue processing.
+ #     0        - Requested to exit, caller should shut down.
+ #  Side effects:
+ #     reply is written to $client.
+ #
+ sub update_clickers {
+     my ($cmd, $tail, $client)  = @_;
+     my $userinput = "$cmd:$tail";
+     my ($udom,$action,$what) =split(/:/,$tail,3);
+     chomp($what);
+     my $hashref = &tie_domain_hash($udom, "clickers", &GDBM_WRCREAT(),
+                                  "U","$action:$what");
+     if (!$hashref) {
+         &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
+                   "while attempting updateclickers\n", $userinput);
+         return 1;
+     }
+     my @pairs=split(/\&/,$what);
+     foreach my $pair (@pairs) {
+         my ($key,$value)=split(/=/,$pair);
+         if ($action eq 'add') {
+             if (exists($hashref->{$key})) {
+                 my @newvals = split(/,/,&unescape($value));
+                 my @currvals = split(/,/,&unescape($hashref->{$key}));
+                 my @merged = sort(keys(%{{map { $_ => 1 } (@newvals,@currvals)}}));
+                 $hashref->{$key}=&escape(join(',',@merged));
+             } else {
+                 $hashref->{$key}=$value;
+             }
+         } elsif ($action eq 'del') {
+             if (exists($hashref->{$key})) {
+                 my %current;
+                 map { $current{$_} = 1; } split(/,/,&unescape($hashref->{$key}));
+                 map { delete($current{$_}); } split(/,/,&unescape($value));
+                 if (keys(%current)) {
+                     $hashref->{$key}=&escape(join(',',sort(keys(%current))));
+                 } else {
+                     delete($hashref->{$key});
+                 }
+             }
+         }
+     }
+     if (&untie_user_hash($hashref)) {
+         &Reply( $client, "ok\n", $userinput);
+     } else {
+         &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
+                  "while attempting put\n",
+                  $userinput);
+     }
+     return 1;
+ }
+ &register_handler("updateclickers", \&update_clickers, 0, 1, 0);
+ # Deletes one or more entries in a namespace db file at the domain level
+ #
+ # Parameters:
+ #    $cmd      - The command that got us here.
+ #    $tail     - Tail of the command (remaining parameters).
+ #                In this case a colon separated list containing:
+ #                (a) the domain for which we are deleting the entries,
+ #                (b) &-separated list of keys to delete.
+ #    $client   - File descriptor connected to client.
+ # Returns
+ #     1        - Continue processing.
+ #     0        - Requested to exit, caller should shut down.
+ #  Side effects:
+ #     reply is written to $client.
+ #
+ sub del_domain_handler {
+     my ($cmd,$tail,$client) = @_;
+     my $userinput = "$cmd:$tail";
+     my ($udom,$namespace,$what)=split(/:/,$tail,3);
+     chomp($what);
+     my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_WRCREAT(),
+                                    "D", $what);
+     if ($hashref) {
+         my @keys=split(/\&/,$what);
+         foreach my $key (@keys) {
+             delete($hashref->{$key});
+         }
+         if (&untie_user_hash($hashref)) {
+             &Reply($client, "ok\n", $userinput);
+         } else {
+             &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
+                     "while attempting deldom\n", $userinput);
+         }
+     } else {
+         &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
+                  "while attempting deldom\n", $userinput);
+     }
+     return 1;
+ }
+ &register_handler("deldom", \&del_domain_handler, 0, 1, 0);
  # Unencrypted get from the namespace database file at the domain level.
  # This function retrieves a keyed item from a specific named database in the
  # domain directory.
  #
  # Parameters:
- #   $cmd             - Command request keyword (get).
+ #   $cmd             - Command request keyword (getdom).
  #   $tail            - Tail of the command.  This is a colon separated list
  #                      consisting of the domain and the 'namespace'
  #                      which selects the gdbm file to do the lookup in,
- Line 4392  sub put_domain_handler {
+ Line 5138  sub put_domain_handler {
  sub get_domain_handler {
      my ($cmd, $tail, $client) = @_;
+     my $userinput = "$cmd:$tail";
-     my $userinput = "$client:$tail";
      my ($udom,$namespace,$what)=split(/:/,$tail,3);
-     chomp($what);
+     if ($namespace =~ /^enc/) {
-     my @queries=split(/\&/,$what);
+         &Failure( $client, "refused\n", $userinput);
-     my $qresult='';
+     } else {
-     my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
+         my $res = LONCAPA::Lond::get_dom($userinput);
-     if ($hashref) {
+         if ($res =~ /^error:/) {
-         for (my $i=0;$i<=$#queries;$i++) {
+             &Failure($client, \$res, $userinput);
-             $qresult.="$hashref->{$queries[$i]}&";
-         }
-         if (&untie_domain_hash($hashref)) {
-             $qresult=~s/\&$//;
-             &Reply($client, \$qresult, $userinput);
          } else {
-             &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
+             &Reply($client, \$res, $userinput);
-                       "while attempting getdom\n",$userinput);
          }
-     } else {
-         &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
-                  "while attempting getdom\n",$userinput);
      }
      return 1;
  }
  &register_handler("getdom", \&get_domain_handler, 0, 1, 0);
+ sub encrypted_get_domain_handler {
+     my ($cmd, $tail, $client) = @_;
+     my $userinput = "$cmd:$tail";
+     my $res = LONCAPA::Lond::get_dom($userinput);
+     if ($res =~ /^error:/) {
+         &Failure($client, \$res, $userinput);
+     } else {
+         if ($cipher) {
+             my $cmdlength=length($res);
+             $res.="         ";
+             my $encres='';
+             for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
+                 $encres.= unpack("H16",
+                                  $cipher->encrypt(substr($res,
+                                                          $encidx,
+)));
+             }
+             &Reply( $client,"enc:$cmdlength:$encres\n",$userinput);
+         } else {
+             &Failure( $client, "error:no_key\n",$userinput);
+         }
+     }
+     return 1;
+ }
+ &register_handler("egetdom", \&encrypted_get_domain_handler, 1, 1, 0);
  #
  #  Puts an id to a domains id database.
  #
- Line 4529  sub get_id_handler {
+ Line 5293  sub get_id_handler {
  # Returns:
  #     1   - Continue processing
  #     0   - Exit server.
  #
  #
  sub del_id_handler {
- Line 4845  sub tmp_put_handler {
+ Line 5609  sub tmp_put_handler {
      }
      my ($id,$store);
      $tmpsnum++;
-     if (($context eq 'resetpw') || ($context eq 'createaccount')) {
+     my $numtries = 0;
-         $id = &md5_hex(&md5_hex(time.{}.rand().$$));
+     my $execdir=$perlvar{'lonDaemons'};
+     if (($context eq 'resetpw') || ($context eq 'createaccount') ||
+         ($context eq 'sso') || ($context eq 'link') || ($context eq 'retry')) {
+         $id = &md5_hex(&md5_hex(time.{}.rand().$$.$tmpsnum));
+         while ((-e "$execdir/tmp/$id.tmp") && ($numtries <10)) {
+             undef($id);
+             $id = &md5_hex(&md5_hex(time.{}.rand().$$.$tmpsnum));
+             $numtries ++;
+         }
      } else {
          $id = $$.'_'.$clientip.'_'.$tmpsnum;
      }
      $id=~s/\W/\_/g;
      $record=~s/\n//g;
-     my $execdir=$perlvar{'lonDaemons'};
+     if (($id ne '') &&
-     if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
+         ($store=IO::File->new(">$execdir/tmp/$id.tmp"))) {
  	print $store $record;
  	close $store;
  	&Reply($client, \$id, $userinput);
- Line 4936  sub tmp_del_handler {
+ Line 5708  sub tmp_del_handler {
  &register_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
  #
+ #  Process the updatebalcookie command.  This command updates a
+ #  cookie in the lonBalancedir directory on a load balancer node.
+ #
+ # Parameters:
+ #   $cmd      - Command that got us here.
+ #   $tail     - Tail of the request (escaped cookie: escaped current entry)
+ #
+ #   $client   - socket open on the client process.
+ #
+ # Returns:
+ #   1     - Indicating processing should continue.
+ # Side Effects:
+ #   A cookie file is updated from the lonBalancedir directory
+ #   A reply is sent to the client.
+ #
+ sub update_balcookie_handler {
+     my ($cmd, $tail, $client) = @_;
+     my $userinput= "$cmd:$tail";
+     chomp($tail);
+     my ($cookie,$lastentry) = map { &unescape($_) } (split(/:/,$tail));
+     my $updatedone;
+     if ($cookie =~ /^$LONCAPA::match_domain\_$LONCAPA::match_username\_[a-f0-9]{32}$/) {
+         my $execdir=$perlvar{'lonBalanceDir'};
+         if (-e "$execdir/$cookie.id") {
+             my $doupdate;
+             if (open(my $fh,'<',"$execdir/$cookie.id")) {
+                 while (my $line = <$fh>) {
+                     chomp($line);
+                     if ($line eq $lastentry) {
+                         $doupdate = 1;
+                         last;
+                     }
+                 }
+                 close($fh);
+             }
+             if ($doupdate) {
+                 if (open(my $fh,'>',"$execdir/$cookie.id")) {
+                     print $fh $clientname;
+                     close($fh);
+                     $updatedone = 1;
+                 }
+             }
+         }
+     }
+     if ($updatedone) {
+         &Reply($client, "ok\n", $userinput);
+     } else {
+         &Failure( $client, "error: ".($!+0)."file update failed ".
+                   "while attempting updatebalcookie\n", $userinput);
+     }
+     return 1;
+ }
+ &register_handler("updatebalcookie", \&update_balcookie_handler, 0, 1, 0);
+ #
+ #  Process the delbalcookie command. This command deletes a balancer
+ #  cookie in the lonBalancedir directory on a load balancer node.
+ #
+ # Parameters:
+ #   $cmd      - Command that got us here.
+ #   $cookie   - Cookie to be deleted.
+ #   $client   - socket open on the client process.
+ #
+ # Returns:
+ #   1     - Indicating processing should continue.
+ # Side Effects:
+ #   A cookie file is deleted from the lonBalancedir directory
+ #   A reply is sent to the client.
+ sub del_balcookie_handler {
+     my ($cmd, $cookie, $client) = @_;
+     my $userinput= "$cmd:$cookie";
+     chomp($cookie);
+     $cookie = &unescape($cookie);
+     my $deleted = '';
+     if ($cookie =~ /^$LONCAPA::match_domain\_$LONCAPA::match_username\_[a-f0-9]{32}$/) {
+         my $execdir=$perlvar{'lonBalanceDir'};
+         if (-e "$execdir/$cookie.id") {
+             if (open(my $fh,'<',"$execdir/$cookie.id")) {
+                 my $dodelete;
+                 while (my $line = <$fh>) {
+                     chomp($line);
+                     if ($line eq $clientname) {
+                         $dodelete = 1;
+                         last;
+                     }
+                 }
+                 close($fh);
+                 if ($dodelete) {
+                     if (unlink("$execdir/$cookie.id")) {
+                         $deleted = 1;
+                     }
+                 }
+             }
+         }
+     }
+     if ($deleted) {
+         &Reply($client, "ok\n", $userinput);
+     } else {
+         &Failure( $client, "error: ".($!+0)."Unlinking cookie file Failed ".
+                   "while attempting delbalcookie\n", $userinput);
+     }
+     return 1;
+ }
+ &register_handler("delbalcookie", \&del_balcookie_handler, 0, 1, 0);
+ #
  #   Processes the setannounce command.  This command
  #   creates a file named announce.txt in the top directory of
  #   the documentn root and sets its contents.  The announce.txt file is
- Line 5118  sub validate_instcode_handler {
+ Line 6000  sub validate_instcode_handler {
  }
  &register_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
+ #
+ #  Validate co-owner for cross-listed institutional code and
+ #  institutional course code itself used for a LON-CAPA course.
+ #
+ # Formal Parameters:
+ #   $cmd          - The command request that got us dispatched.
+ #   $tail         - The tail of the command.  In this case,
+ #                   this is a colon separated string containing:
+ #      $dom            - Course's LON-CAPA domain
+ #      $instcode       - Institutional course code for the course
+ #      $inst_xlist     - Institutional course Id for the crosslisting
+ #      $coowner        - Username of co-owner
+ #      (values for all but $dom have been escaped).
+ #
+ #   $client       - Socket open on the client.
+ # Returns:
+ #    1           - Indicating processing should continue.
+ #
+ sub validate_instcrosslist_handler  {
+     my ($cmd, $tail, $client) = @_;
+     my $userinput = "$cmd:$tail";
+     my ($dom,$instcode,$inst_xlist,$coowner) = split(/:/,$tail);
+     $instcode = &unescape($instcode);
+     $inst_xlist = &unescape($inst_xlist);
+     $coowner = &unescape($coowner);
+     my $outcome = &localenroll::validate_crosslist_access($dom,$instcode,
+                                                           $inst_xlist,$coowner);
+     &Reply($client, \$outcome, $userinput);
+     return 1;
+ }
+ &register_handler("autovalidateinstcrosslist", \&validate_instcrosslist_handler, 0, 1, 0);
  #   Get the official sections for which auto-enrollment is possible.
  #   Since the admin people won't know about 'unofficial sections'
  #   we cannot auto-enroll on them.
- Line 5214  sub validate_course_section_handler {
+ Line 6129  sub validate_course_section_handler {
  # Formal Parameters:
  #    $cmd     - The command request that got us dispatched.
  #    $tail    - The tail of the command.   In this case this is a colon separated
- #               set of words that will be split into:
+ #               set of values that will be split into:
  #               $inst_class  - Institutional code for the specific class section
- #               $courseowner - The escaped username:domain of the course owner
+ #               $ownerlist   - An escaped comma-separated list of username:domain
+ #                              of the course owner, and co-owner(s).
  #               $cdom        - The domain of the course from the institution's
  #                              point of view.
  #    $client  - The socket open on the client.
- Line 5241  sub validate_class_access_handler {
+ Line 6157  sub validate_class_access_handler {
  &register_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
  #
+ #    Modify institutional sections (using customized &instsec_reformat()
+ #    routine in localenroll.pm), to either clutter or declutter, for
+ #    purposes of ensuring an institutional course section (string) can
+ #    be unambiguously separated into institutional course and section.
+ #
+ # Formal Parameters:
+ #    $cmd     - The command request that got us dispatched.
+ #    $tail    - The tail of the command.   In this case this is a colon separated
+ #               set of values that will be split into:
+ #               $cdom        - The LON-CAPA domain of the course.
+ #               $action      - Either: clutter or declutter
+ #                              clutter adds character(s) to eliminate ambiguity
+ #                              declutter removes the added characters (e.g., for
+ #                              display of the institutional course section string.
+ #               $info        - A frozen hash in which keys are:
+ #                              LON-CAPA course number:Institutional course code
+ #                              and values are a reference to an array of the
+ #                              items to modify -- either institutional sections,
+ #                              or institutional course sections (for crosslistings).
+ #    $client  - The socket open on the client.
+ # Returns:
+ #    1 - continue processing.
+ #
+ sub instsec_reformat_handler {
+     my ($cmd, $tail, $client) = @_;
+     my $userinput = "$cmd:$tail";
+     my ($cdom,$action,$info) = split(/:/,$tail);
+     my $instsecref = &Apache::lonnet::thaw_unescape($info);
+     my ($outcome,$result);
+     eval {
+         local($SIG{__DIE__})='DEFAULT';
+         $outcome=&localenroll::instsec_reformat($cdom,$action,$instsecref);
+         if ($outcome eq 'ok') {
+             if (ref($instsecref) eq 'HASH') {
+                 foreach my $key (keys(%{$instsecref})) {
+                     $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($instsecref->{$key}).'&';
+                 }
+                 $result =~ s/\&$//;
+             }
+         }
+     };
+     if (!$@) {
+         if ($outcome eq 'ok') {
+             &Reply( $client, \$result, $userinput);
+         } else {
+             &Reply($client,\$outcome, $userinput);
+         }
+     } else {
+         &Failure($client,"unknown_cmd\n",$userinput);
+     }
+     return 1;
+ }
+ &register_handler("autoinstsecreformat",\&instsec_reformat_handler, 0, 1, 0);
+ #
+ #   Validate course owner or co-owners(s) access to enrollment data for all sections
+ #   and crosslistings for a particular course.
+ #
+ #
+ # Formal Parameters:
+ #    $cmd     - The command request that got us dispatched.
+ #    $tail    - The tail of the command.   In this case this is a colon separated
+ #               set of values that will be split into:
+ #               $ownerlist   - An escaped comma-separated list of username:domain
+ #                              of the course owner, and co-owner(s).
+ #               $cdom        - The domain of the course from the institution's
+ #                              point of view.
+ #               $classes     - Frozen hash of institutional course sections and
+ #                              crosslistings.
+ #    $client  - The socket open on the client.
+ # Returns:
+ #    1 - continue processing.
+ #
+ sub validate_classes_handler {
+     my ($cmd, $tail, $client) = @_;
+     my $userinput = "$cmd:$tail";
+     my ($ownerlist,$cdom,$classes) = split(/:/, $tail);
+     my $classesref = &Apache::lonnet::thaw_unescape($classes);
+     my $owners = &unescape($ownerlist);
+     my $result;
+     eval {
+         local($SIG{__DIE__})='DEFAULT';
+         my %validations;
+         my $response = &localenroll::check_instclasses($owners,$cdom,$classesref,
+                                                        \%validations);
+         if ($response eq 'ok') {
+             foreach my $key (keys(%validations)) {
+                 $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
+             }
+             $result =~ s/\&$//;
+         } else {
+             $result = 'error';
+         }
+     };
+     if (!$@) {
+         &Reply($client, \$result, $userinput);
+     } else {
+         &Failure($client,"unknown_cmd\n",$userinput);
+     }
+     return 1;
+ }
+ &register_handler("autovalidateinstclasses", \&validate_classes_handler, 0, 1, 0);
+ #
  #   Create a password for a new LON-CAPA user added by auto-enrollment.
  #   Only used for case where authentication method for new user is localauth
  #
- Line 5275  sub create_auto_enroll_password_handler
+ Line 6297  sub create_auto_enroll_password_handler
  &register_handler("autocreatepassword", \&create_auto_enroll_password_handler,
 , 1, 0);
+ sub auto_export_grades_handler {
+     my ($cmd, $tail, $client) = @_;
+     my $userinput = "$cmd:$tail";
+     my ($cdom,$cnum,$info,$data) = split(/:/,$tail);
+     my $inforef = &Apache::lonnet::thaw_unescape($info);
+     my $dataref = &Apache::lonnet::thaw_unescape($data);
+     my ($outcome,$result);;
+     eval {
+         local($SIG{__DIE__})='DEFAULT';
+         my %rtnhash;
+         $outcome=&localenroll::export_grades($cdom,$cnum,$inforef,$dataref,\%rtnhash);
+         if ($outcome eq 'ok') {
+             foreach my $key (keys(%rtnhash)) {
+                 $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
+             }
+             $result =~ s/\&$//;
+         }
+     };
+     if (!$@) {
+         if ($outcome eq 'ok') {
+             if ($cipher) {
+                 my $cmdlength=length($result);
+                 $result.="         ";
+                 my $encresult='';
+                 for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
+                     $encresult.= unpack("H16",
+                                         $cipher->encrypt(substr($result,
+                                                                 $encidx,
+)));
+                 }
+                 &Reply( $client, "enc:$cmdlength:$encresult\n", $userinput);
+             } else {
+                 &Failure( $client, "error:no_key\n", $userinput);
+             }
+         } else {
+             &Reply($client, "$outcome\n", $userinput);
+         }
+     } else {
+         &Failure($client,"export_error\n",$userinput);
+     }
+     return 1;
+ }
+ &register_handler("autoexportgrades", \&auto_export_grades_handler,
+, 1, 0);
  #   Retrieve and remove temporary files created by/during autoenrollment.
  #
  # Formal Parameters:
  #    $cmd      - The command that got us dispatched.
  #    $tail     - The tail of the command.  In our case this is a colon
  #                separated list that will be split into:
- #                $filename - The name of the file to remove.
+ #                $filename - The name of the file to retrieve.
  #                            The filename is given as a path relative to
  #                            the LonCAPA temp file directory.
  #    $client   - Socket open on the client.
- Line 5295  sub retrieve_auto_file_handler {
+ Line 6362  sub retrieve_auto_file_handler {
      my ($filename)   = split(/:/, $tail);
      my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
-     if ( (-e $source) && ($filename ne '') ) {
+     if ($filename =~m{/\.\./}) {
+         &Failure($client, "refused\n", $userinput);
+     } elsif ($filename !~ /^$LONCAPA::match_domain\_$LONCAPA::match_courseid\_.+_classlist\.xml$/) {
+         &Failure($client, "refused\n", $userinput);
+     } elsif ( (-e $source) && ($filename ne '') ) {
  	my $reply = '';
  	if (open(my $fh,$source)) {
  	    while (<$fh>) {
- Line 5327  sub crsreq_checks_handler {
+ Line 6399  sub crsreq_checks_handler {
      my $userinput = "$cmd:$tail";
      my $dom = $tail;
      my $result;
-     my @reqtypes = ('official','unofficial','community','textbook');
+     my @reqtypes = ('official','unofficial','community','textbook','placement');
      eval {
          local($SIG{__DIE__})='DEFAULT';
          my %validations;
- Line 5932  sub get_request {
+ Line 7004  sub get_request {
  #
  # Parameters:
  #    user_input   - The request received from the client (lonc).
+ #
  # Returns:
  #    true to keep processing, false if caller should exit.
  #
  sub process_request {
-     my ($userinput) = @_;      # Easier for now to break style than to
+     my ($userinput) = @_; # Easier for now to break style than to
-                                 # fix all the userinput -> user_input.
+                           # fix all the userinput -> user_input.
      my $wasenc    = 0;		# True if request was encrypted.
  # ------------------------------------------------------------ See if encrypted
      # for command
- Line 6017  sub process_request {
+ Line 7090  sub process_request {
  	    Debug("Client not privileged to do this operation");
  	    $ok = 0;
  	}
+         if ($ok) {
+             my $realcommand = $command;
+             if ($command eq 'querysend') {
+                 my ($query,$rest)=split(/\:/,$tail,2);
+                 $query=~s/\n*$//g;
+                 my @possqueries =
+                     qw(userlog courselog fetchenrollment institutionalphotos usersearch instdirsearch getinstuser getmultinstusers);
+                 if (grep(/^\Q$query\E$/,@possqueries)) {
+                     $command .= '_'.$query;
+                 } elsif ($query eq 'prepare activity log') {
+                     $command .= '_activitylog';
+                 }
+             }
+             if (ref($trust{$command}) eq 'HASH') {
+                 my $donechecks;
+                 if ($trust{$command}{'anywhere'}) {
+                    $donechecks = 1;
+                 } elsif ($trust{$command}{'manageronly'}) {
+                     unless (&isManager()) {
+                         $ok = 0;
+                     }
+                     $donechecks = 1;
+                 } elsif ($trust{$command}{'institutiononly'}) {
+                     unless ($clientsameinst) {
+                         $ok = 0;
+                     }
+                     $donechecks = 1;
+                 } elsif ($clientsameinst) {
+                     $donechecks = 1;
+                 }
+                 unless ($donechecks) {
+                     foreach my $rule (keys(%{$trust{$command}})) {
+                         next if ($rule eq 'remote');
+                         if ($trust{$command}{$rule}) {
+                             if ($clientprohibited{$rule}) {
+                                 $ok = 0;
+                             } else {
+                                 $ok = 1;
+                                 $donechecks = 1;
+                                 last;
+                             }
+                         }
+                     }
+                 }
+                 unless ($donechecks) {
+                     if ($trust{$command}{'remote'}) {
+                         if ($clientremoteok) {
+                             $ok = 1;
+                         } else {
+                             $ok = 0;
+                         }
+                     }
+                 }
+             }
+             $command = $realcommand;
+         }
  	if($ok) {
  	    Debug("Dispatching to handler $command $tail");
- Line 6027  sub process_request {
+ Line 7156  sub process_request {
  	    Failure($client, "refused\n", $userinput);
  	    return 1;
  	}
+     }
-     }
      print $client "unknown_cmd\n";
  # -------------------------------------------------------------------- complete
- Line 6168  my $wwwid=getpwnam('www');
+ Line 7296  my $wwwid=getpwnam('www');
  if ($wwwid!=$<) {
     my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
     my $subj="LON: $currenthostid User ID mismatch";
-    system("echo 'User ID mismatch.  lond must be run as user www.' |\
+    system("echo 'User ID mismatch.  lond must be run as user www.' |".
-  mailto $emailto -s '$subj' > /dev/null");
+           " mail -s '$subj' $emailto > /dev/null");
     exit 1;
  }
- Line 6285  sub UpdateHosts {
+ Line 7413  sub UpdateHosts {
      #  will take care of new and changed hosts as connections come into being.
      &Apache::lonnet::reset_hosts_info();
+     my %active;
      foreach my $child (keys(%children)) {
  	my $childip = $children{$child};
- Line 6294  sub UpdateHosts {
+ Line 7423  sub UpdateHosts {
  		    ." $child for ip $childip </font>");
  	    kill('INT', $child);
  	} else {
+             $active{$child} = $childip;
  	    logthis('<font color="green"> keeping child for ip '
  		    ." $childip (pid=$child) </font>");
  	}
      }
+     my %oldconf = %secureconf;
+     my %connchange;
+     if (lonssl::Read_Connect_Config(\%secureconf,\%perlvar,\%crlchecked) eq 'ok') {
+         logthis('<font color="blue"> Reloaded SSL connection rules and cleared CRL checking history </font>');
+     } else {
+         logthis('<font color="yellow"> Failed to reload SSL connection rules and clear CRL checking history </font>');
+     }
+     if ((ref($oldconf{'connfrom'}) eq 'HASH') && (ref($secureconf{'connfrom'}) eq 'HASH')) {
+         foreach my $type ('dom','intdom','other') {
+             if ((($oldconf{'connfrom'}{$type} eq 'no') && ($secureconf{'connfrom'}{$type} eq 'req')) ||
+                 (($oldconf{'connfrom'}{$type} eq 'req') && ($secureconf{'connfrom'}{$type} eq 'no'))) {
+                 $connchange{$type} = 1;
+             }
+         }
+     }
+     if (keys(%connchange)) {
+         foreach my $child (keys(%active)) {
+             my $childip = $active{$child};
+             if ($childip ne '127.0.0.1') {
+                 my $childhostname  = gethostbyaddr(Socket::inet_aton($childip),AF_INET);
+                 if ($childhostname ne '') {
+                     my $childlonhost = &Apache::lonnet::get_server_homeID($childhostname);
+                     my ($samedom,$sameinst) = &set_client_info($childlonhost);
+                     if ($samedom) {
+                         if ($connchange{'dom'}) {
+                             logthis('<font color="blue"> UpdateHosts killing child '
+                                    ." $child for ip $childip </font>");
+                             kill('INT', $child);
+                         }
+                     } elsif ($sameinst) {
+                         if ($connchange{'intdom'}) {
+                             logthis('<font color="blue"> UpdateHosts killing child '
+                                    ." $child for ip $childip </font>");
+                            kill('INT', $child);
+                         }
+                     } else {
+                         if ($connchange{'other'}) {
+                             logthis('<font color="blue"> UpdateHosts killing child '
+                                    ." $child for ip $childip </font>");
+                             kill('INT', $child);
+                         }
+                     }
+                 }
+             }
+         }
+     }
      ReloadApache;
      &status("Finished reloading hosts.tab");
  }
  sub checkchildren {
      &status("Checking on the children (sending signals)");
      &initnewstatus();
- Line 6372  sub Debug {
+ Line 7548  sub Debug {
  #     reply   - Text to send to client.
  #     request - Original request from client.
  #
+ #NOTE $reply must be terminated by exactly *one* \n. If $reply is a reference
+ #this is done automatically ($$reply must not contain any \n in this case).
+ #If $reply is a string the caller has to ensure this.
  sub Reply {
      my ($fd, $reply, $request) = @_;
      if (ref($reply)) {
- Line 6534  if ($arch eq 'unknown') {
+ Line 7713  if ($arch eq 'unknown') {
      chomp($arch);
  }
+ unless (lonssl::Read_Connect_Config(\%secureconf,\%perlvar,\%crlchecked) eq 'ok') {
+     &logthis('<font color="blue">No connectionrules table. Will fallback to loncapa.conf</font>');
+ }
  # --------------------------------------------------------------
  #   Accept connections.  When a connection comes in, it is validated
  #   and if good, a child process is created to process transactions
- Line 6619  sub make_new_child {
+ Line 7802  sub make_new_child {
          &Authen::Krb5::init_context();
          my $no_ets;
-         if ($dist =~ /^(?:centos|rhes|scientific)(\d+)$/) {
+         if ($dist =~ /^(?:centos|rhes|scientific|oracle|rocky|alma)(\d+)$/) {
              if ($1 >= 7) {
                  $no_ets = 1;
              }
          } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
              if (($1 eq '9.3') || ($1 >= 12.2)) {
                  $no_ets = 1;
              }
          } elsif ($dist =~ /^sles(\d+)$/) {
              if ($1 > 11) {
- Line 6637  sub make_new_child {
+ Line 7820  sub make_new_child {
              }
          }
          unless ($no_ets) {
-             &Authen::Krb5::init_ets();
+ 	    &Authen::Krb5::init_ets();
-         }
+ 	}
  	&status('Accepted connection');
  # =============================================================================
- Line 6682  sub make_new_child {
+ Line 7865  sub make_new_child {
  		#  If the remote is attempting a local init... give that a try:
  		#
  		(my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
-                 # For LON-CAPA 2.9, the  client session will have sent its LON-CAPA
+         # For LON-CAPA 2.9, the  client session will have sent its LON-CAPA
-                 # version when initiating the connection. For LON-CAPA 2.8 and older,
+         # version when initiating the connection. For LON-CAPA 2.8 and older,
-                 # the version is retrieved from the global %loncaparevs in lonnet.pm.
+         # the version is retrieved from the global %loncaparevs in lonnet.pm.
-                 # $clientversion contains path to keyfile if $inittype eq 'local'
+         # $clientversion contains path to keyfile if $inittype eq 'local'
-                 # it's overridden below in this case
+         # it's overridden below in this case
-                 $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
+         $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
  		# If the connection type is ssl, but I didn't get my
  		# certificate files yet, then I'll drop  back to
  		# insecure (if allowed).
+                 if ($inittype eq "ssl") {
+                     my $context;
+                     if ($clientsamedom) {
+                         $context = 'dom';
+                         if ($secureconf{'connfrom'}{'dom'} eq 'no') {
+                             $inittype = "";
+                         }
+                     } elsif ($clientsameinst) {
+                         $context = 'intdom';
+                         if ($secureconf{'connfrom'}{'intdom'} eq 'no') {
+                             $inittype = "";
+                         }
+                     } else {
+                         $context = 'other';
+                         if ($secureconf{'connfrom'}{'other'} eq 'no') {
+                             $inittype = "";
+                         }
+                     }
+                     if ($inittype eq '') {
+                         &logthis("<font color=\"blue\"> Domain config set "
+                                 ."to no ssl for $clientname (context: $context)"
+                                 ." -- trying insecure auth</font>");
+                     }
+                 }
  		if($inittype eq "ssl") {
  		    my ($ca, $cert) = lonssl::CertificateFile;
  		    my $kfile       = lonssl::KeyFile;
- Line 6725  sub make_new_child {
+ Line 7933  sub make_new_child {
  			close $client;
  		    }
  		} elsif ($inittype eq "ssl") {
- 		    my $key = SSLConnection($client);
+ 		    my $key = SSLConnection($client,$clientname);
  		    if ($key) {
  			$clientok = 1;
  			my $cipherkey = pack("H32", $key);
- Line 6752  sub make_new_child {
+ Line 7960  sub make_new_child {
  				  ."Attempted insecure connection disallowed </font>");
  			close $client;
  			$clientok = 0;
  		    }
  		}
  	    } else {
- Line 6761  sub make_new_child {
+ Line 7968  sub make_new_child {
  			 ."$clientip failed to initialize: >$remotereq< </font>");
  		&status('No init '.$clientip);
  	    }
  	} else {
  	    &logthis(
  		     "<font color='blue'>WARNING: Unknown client $clientip</font>");
- Line 6779  sub make_new_child {
+ Line 7985  sub make_new_child {
  # ------------------------------------------------------------ Process requests
  	    my $keep_going = 1;
  	    my $user_input;
-             my $clienthost = &Apache::lonnet::hostname($clientname);
-             my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
-             $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);
  	    while(($user_input = get_request) && $keep_going) {
  		alarm(120);
  		Debug("Main: Got $user_input\n");
  		$keep_going = &process_request($user_input);
  		alarm(0);
  		&status('Listening to '.$clientname." ($keymode)");
  	    }
  # --------------------------------------------- client unknown or fishy, refuse
- Line 6797  sub make_new_child {
+ Line 8001  sub make_new_child {
  	    &logthis("<font color='blue'>WARNING: "
  		     ."Rejected client $clientip, closing connection</font>");
  	}
      }
  # =============================================================================
      &logthis("<font color='red'>CRITICAL: "
  	     ."Disconnect from $clientip ($clientname)</font>");
      # this exit is VERY important, otherwise the child will become
      # a producer of more and more children, forking yourself into
      # process death.
      exit;
  }
+ #
+ #  Used to determine if a particular client is from the same domain
+ #  as the current server, or from the same internet domain, and
+ #  also if the client can host sessions for the domain's users.
+ #  A hash is populated with keys set to commands sent by the client
+ #  which may not be executed for this domain.
+ #
+ #  Optional input -- the client to check for domain and internet domain.
+ #  If not specified, defaults to the package variable: $clientname
+ #
+ #  If called in array context will not set package variables, but will
+ #  instead return an array of two values - (a) true if client is in the
+ #  same domain as the server, and (b) true if client is in the same
+ #  internet domain.
+ #
+ #  If called in scalar context, sets package variables for current client:
+ #
+ #  $clienthomedom    - LonCAPA domain of homeID for client.
+ #  $clientsamedom    - LonCAPA domain same for this host and client.
+ #  $clientintdom     - LonCAPA "internet domain" for client.
+ #  $clientsameinst   - LonCAPA "internet domain" same for this host & client.
+ #  $clientremoteok   - If current domain permits hosting on this client: 1
+ #  %clientprohibited - Commands prohibited for domain's users for this client.
+ #
+ #  if the host and client have the same "internet domain", then the value
+ #  of $clientremoteok is not used, and no commands are prohibited.
+ #
+ #  returns 1 to indicate package variables have been set for current client.
+ #
+ sub set_client_info {
+     my ($lonhost) = @_;
+     $lonhost ||= $clientname;
+     my $clienthost = &Apache::lonnet::hostname($lonhost);
+     my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
+     my $homedom = &Apache::lonnet::host_domain($clientserverhomeID);
+     my $samedom = 0;
+     if ($perlvar{'lonDefDomain'} eq $homedom) {
+         $samedom = 1;
+     }
+     my $intdom = &Apache::lonnet::internet_dom($clientserverhomeID);
+     my $sameinst = 0;
+     if ($intdom ne '') {
+         my $internet_names = &Apache::lonnet::get_internet_names($currenthostid);
+         if (ref($internet_names) eq 'ARRAY') {
+             if (grep(/^\Q$intdom\E$/,@{$internet_names})) {
+                 $sameinst = 1;
+             }
+         }
+     }
+     if (wantarray) {
+         return ($samedom,$sameinst);
+     } else {
+         $clienthomedom = $homedom;
+         $clientsamedom = $samedom;
+         $clientintdom = $intdom;
+         $clientsameinst = $sameinst;
+         if ($clientsameinst) {
+             undef($clientremoteok);
+             undef(%clientprohibited);
+         } else {
+             $clientremoteok = &get_remote_hostable($currentdomainid);
+             %clientprohibited = &get_prohibited($currentdomainid);
+         }
+         return 1;
+     }
+ }
  #
  #   Determine if a user is an author for the indicated domain.
  #
- Line 6919  sub password_filename {
+ Line 8192  sub password_filename {
  #    domain    - domain of the user.
  #    name      - User's name.
  #    contents  - New contents of the file.
+ #    saveold   - (optional). If true save old file in a passwd.bak file.
  # Returns:
  #   0    - Failed.
  #   1    - Success.
  #
  sub rewrite_password_file {
-     my ($domain, $user, $contents) = @_;
+     my ($domain, $user, $contents, $saveold) = @_;
      my $file = &password_filename($domain, $user);
      if (defined $file) {
+         if ($saveold) {
+             my $bakfile = $file.'.bak';
+             if (CopyFile($file,$bakfile)) {
+                 chmod(0400,$bakfile);
+                 &logthis("Old password saved in passwd.bak for internally authenticated user: $user:$domain");
+             } else {
+                 &logthis("Failed to save old password in passwd.bak for internally authenticated user: $user:$domain");
+             }
+         }
  	my $pf = IO::File->new(">$file");
  	if($pf) {
  	    print $pf "$contents\n";
- Line 7018  sub validate_user {
+ Line 8301  sub validate_user {
                  $contentpwd = $domdefaults{'auth_arg_def'};
              }
          }
      }
      if ($howpwd ne 'nouser') {
  	if($howpwd eq "internal") { # Encrypted is in local password file.
- 	    $validated = (crypt($password, $contentpwd) eq $contentpwd);
+             if (length($contentpwd) == 13) {
+                 $validated = (crypt($password,$contentpwd) eq $contentpwd);
+                 if ($validated) {
+                     my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
+                     if ($domdefaults{'intauth_switch'}) {
+                         my $ncpass = &hash_passwd($domain,$password);
+                         my $saveold;
+                         if ($domdefaults{'intauth_switch'} == 2) {
+                             $saveold = 1;
+                         }
+                         if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass",$saveold)) {
+                             &update_passwd_history($user,$domain,$howpwd,'conversion');
+                             &logthis("Validated password hashed with bcrypt for $user:$domain");
+                         }
+                     }
+                 }
+             } else {
+                 $validated = &check_internal_passwd($password,$contentpwd,$domain,$user);
+             }
  	}
  	elsif ($howpwd eq "unix") { # User is a normal unix user.
  	    $contentpwd = (getpwnam($user))[1];
- Line 7089  sub validate_user {
+ Line 8390  sub validate_user {
      return $validated;
  }
+ sub check_internal_passwd {
+     my ($plainpass,$stored,$domain,$user) = @_;
+     my (undef,$method,@rest) = split(/!/,$stored);
+     if ($method eq 'bcrypt') {
+         my $result = &hash_passwd($domain,$plainpass,@rest);
+         if ($result ne $stored) {
+             return 0;
+         }
+         my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
+         if ($domdefaults{'intauth_check'}) {
+             # Upgrade to a larger number of rounds if necessary
+             my $defaultcost = $domdefaults{'intauth_cost'};
+             if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
+                 $defaultcost = 10;
+             }
+             if (int($rest[0])<int($defaultcost)) {
+                 if ($domdefaults{'intauth_check'} == 1) {
+                     my $ncpass = &hash_passwd($domain,$plainpass);
+                     if (&rewrite_password_file($domain,$user,"internal:$ncpass")) {
+                         &update_passwd_history($user,$domain,'internal','update cost');
+                         &logthis("Validated password hashed with bcrypt for $user:$domain");
+                     }
+                     return 1;
+                 } elsif ($domdefaults{'intauth_check'} == 2) {
+                     return 0;
+                 }
+             }
+         } else {
+             return 1;
+         }
+     }
+     return 0;
+ }
+ sub get_last_authchg {
+     my ($domain,$user) = @_;
+     my $lastmod;
+     my $logname = &propath($domain,$user).'/passwd.log';
+     if (-e "$logname") {
+         $lastmod = (stat("$logname"))[9];
+     }
+     return $lastmod;
+ }
  sub krb4_authen {
      my ($password,$null,$user,$contentpwd) = @_;
      my $validated = 0;
- Line 7404  sub change_unix_password {
+ Line 8749  sub change_unix_password {
  sub make_passwd_file {
-     my ($uname,$udom,$umode,$npass,$passfilename)=@_;
+     my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
      my $result="ok";
      if ($umode eq 'krb4' or $umode eq 'krb5') {
  	{
  	    my $pf = IO::File->new(">$passfilename");
  	    if ($pf) {
  		print $pf "$umode:$npass\n";
+                 &update_passwd_history($uname,$udom,$umode,$action);
  	    } else {
  		$result = "pass_file_failed_error";
  	    }
  	}
      } elsif ($umode eq 'internal') {
- 	my $salt=time;
+         my $ncpass = &hash_passwd($udom,$npass);
- 	$salt=substr($salt,6,2);
- 	my $ncpass=crypt($npass,$salt);
  	{
  	    &Debug("Creating internal auth");
  	    my $pf = IO::File->new(">$passfilename");
  	    if($pf) {
  		print $pf "internal:$ncpass\n";
+                 &update_passwd_history($uname,$udom,$umode,$action);
  	    } else {
  		$result = "pass_file_failed_error";
  	    }
- Line 7433  sub make_passwd_file {
+ Line 8778  sub make_passwd_file {
  	    my $pf = IO::File->new(">$passfilename");
  	    if($pf) {
  		print $pf "localauth:$npass\n";
+                 &update_passwd_history($uname,$udom,$umode,$action);
  	    } else {
  		$result = "pass_file_failed_error";
  	    }
- Line 7449  sub make_passwd_file {
+ Line 8795  sub make_passwd_file {
  		$result = "pass_file_failed_error";
  	    }
  	}
+     } elsif ($umode eq 'lti') {
+         my $pf = IO::File->new(">$passfilename");
+         if($pf) {
+             print $pf "lti:\n";
+             &update_passwd_history($uname,$udom,$umode,$action);
+         } else {
+             $result = "pass_file_failed_error";
+         }
      } else {
  	$result="auth_mode_error";
      }
- Line 7473  sub sethost {
+ Line 8827  sub sethost {
  	eq &Apache::lonnet::get_host_ip($hostid)) {
  	$currenthostid  =$hostid;
  	$currentdomainid=&Apache::lonnet::host_domain($hostid);
+         &set_client_info();
  #	&logthis("Setting hostid to $hostid, and domain to $currentdomainid");
      } else {
  	&logthis("Requested host id $hostid not an alias of ".
- Line 7495  sub get_usersession_config {
+ Line 8850  sub get_usersession_config {
          return $usersessionconf;
      } else {
          my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
-         if (ref($domconfig{'usersessions'}) eq 'HASH') {
+         &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
-             &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
+         return $domconfig{'usersessions'};
-             return $domconfig{'usersessions'};
+     }
-         }
+     return;
+ }
+ sub get_usersearch_config {
+     my ($dom,$name) = @_;
+     my ($usersearchconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
+     if (defined($cached)) {
+         return $usersearchconf;
+     } else {
+         my %domconfig = &Apache::lonnet::get_dom('configuration',['directorysrch'],$dom);
+         &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'directorysrch'},600);
+         return $domconfig{'directorysrch'};
      }
      return;
  }
+ sub get_prohibited {
+     my ($dom) = @_;
+     my $name = 'trust';
+     my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
+     unless (defined($cached)) {
+         my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$dom);
+         &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'trust'},3600);
+         $trustconfig = $domconfig{'trust'};
+     }
+     my %prohibited;
+     if (ref($trustconfig)) {
+         foreach my $prefix (keys(%{$trustconfig})) {
+             if (ref($trustconfig->{$prefix}) eq 'HASH') {
+                 my $reject;
+                 if (ref($trustconfig->{$prefix}->{'exc'}) eq 'ARRAY') {
+                     if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'exc'}})) {
+                         $reject = 1;
+                     }
+                 }
+                 if (ref($trustconfig->{$prefix}->{'inc'}) eq 'ARRAY') {
+                     if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'inc'}})) {
+                         $reject = 0;
+                     } else {
+                         $reject = 1;
+                     }
+                 }
+                 if ($reject) {
+                     $prohibited{$prefix} = 1;
+                 }
+             }
+         }
+     }
+     return %prohibited;
+ }
+ sub get_remote_hostable {
+     my ($dom) = @_;
+     my $result;
+     if ($clientintdom) {
+         $result = 1;
+         my $remsessconf = &get_usersession_config($dom,'remotesession');
+         if (ref($remsessconf) eq 'HASH') {
+             if (ref($remsessconf->{'remote'}) eq 'HASH') {
+                 if (ref($remsessconf->{'remote'}->{'excludedomain'}) eq 'ARRAY') {
+                     if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'excludedomain'}})) {
+                         $result = 0;
+                     }
+                 }
+                 if (ref($remsessconf->{'remote'}->{'includedomain'}) eq 'ARRAY') {
+                     if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'includedomain'}})) {
+                         $result = 1;
+                     } else {
+                         $result = 0;
+                     }
+                 }
+             }
+         }
+     }
+     return $result;
+ }
  sub distro_and_arch {
      return $dist.':'.$arch;
- Line 7687  Allow for a password to be set.
+ Line 9113  Allow for a password to be set.
  Make a user.
- =item passwd
+ =item changeuserauth
  Allow for authentication mechanism and password to be changed.
- Line 7776  for each student, defined perhaps by the
+ Line 9202  for each student, defined perhaps by the
  Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers
  for each student, defined perhaps by the institutional Registrar.)
+ =item iddel
+ Deletes one or more ids in a domain's id database.
  =item tmpput
  Accept and store information in temporary space.
- Line 7825  IO::File
+ Line 9255  IO::File
  Apache::File
  POSIX
  Crypt::IDEA
- LWP::UserAgent()
  GDBM_File
  Authen::Krb4
  Authen::Krb5
  =head1 COREQUISITES
+ none
  =head1 OSNAMES
  linux
- Line 7905  is closed and the child exits.
+ Line 9336  is closed and the child exits.
  =item Red CRITICAL Can't get key file <error>
  SSL key negotiation is being attempted but the call to
- lonssl::KeyFile  failed.  This usually means that the
+ lonssl::KeyFile failed.  This usually means that the
  configuration file is not correctly defining or protecting
  the directories/files lonCertificateDirectory or
  lonnetPrivateKey
- Line 7919  or the CA's certificate in the call to l
+ Line 9350  or the CA's certificate in the call to l
  <error> is the textual reason this failed.  Usual reasons:
  =over 2
  =item Apache config file for loncapa  incorrect:
  one of the variables
  lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
  undefined or incorrect
- Line 8040  Could not rewrite the
+ Line 9471  Could not rewrite the
  internal password file for a user
  =item Result of password change for <user> : <result>
  A unix password change for <user> was attempted
  and the pipe returned <result>
- Line 8069  lond has been asked to exit by its clien
+ Line 9500  lond has been asked to exit by its clien
  client systemand <input> is the full exit command sent to the server.
  =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
  A lond child terminated.  NOte that this termination can also occur when the
  child receives the QUIT or DIE signals.  <pid> is the process id of the child,
  <hostname> the host lond is working for, and <message> the reason the child died
- Line 8153  file when sent it's USR1 signal.  That p
+ Line 9584  file when sent it's USR1 signal.  That p
  assumed to be hung in some un-fixable way.
  =item Finished checking children
  Master processs's USR1 processing is cojmplete.
  =item (Red) CRITICAL: ------- Starting ------
- Line 8167  Started a new child process for <client>
+ Line 9598  Started a new child process for <client>
  connected to the child.  This was as a result of a TCP/IP connection from a client.
  =item Unable to determine who caller was, getpeername returned nothing
  In child process initialization.  either getpeername returned undef or
  a zero sized object was returned.  Processing continues, but in my opinion,
  this should be cause for the child to exit.
- Line 8178  In child process initialization.  The pe
+ Line 9609  In child process initialization.  The pe
  The client address is stored as "Unavailable" and processing continues.
  =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
  In child initialization.  A good connectionw as received from <ip>.
  =over 2
- Line 8228  The client (<client> is the peer's name
+ Line 9659  The client (<client> is the peer's name
  negotiated an SSL connection with this child process.
  =item (Green) Successful insecure authentication with <client>
  The client has successfully negotiated an  insecure connection withthe child process.

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>

Removed from v.1.489.2.19
changed lines
	Added in v.1.570