Diff for /loncom/lond between versions 1.489.2.9 and 1.576

version 1.489.2.9, 2013/10/17 00:36:01 version 1.576, 2022/07/25 23:31:40
Line 15 Line 15
 #  #
 # LON-CAPA is distributed in the hope that it will be useful,  # LON-CAPA is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of  # but WITHOUT ANY WARRANTY; without even the implied warranty of
   
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.  # GNU General Public License for more details.
 #  #
Line 36  use LONCAPA; Line 35  use LONCAPA;
 use LONCAPA::Configuration;  use LONCAPA::Configuration;
 use LONCAPA::Lond;  use LONCAPA::Lond;
   
   use Socket;
 use IO::Socket;  use IO::Socket;
 use IO::File;  use IO::File;
 #use Apache::File;  #use Apache::File;
 use POSIX;  use POSIX;
 use Crypt::IDEA;  use Crypt::IDEA;
 use LWP::UserAgent();  use HTTP::Request;
 use Digest::MD5 qw(md5_hex);  use Digest::MD5 qw(md5_hex);
 use GDBM_File;  use GDBM_File;
 use Authen::Krb5;  use Authen::Krb5;
Line 55  use LONCAPA::lonssl; Line 55  use LONCAPA::lonssl;
 use Fcntl qw(:flock);  use Fcntl qw(:flock);
 use Apache::lonnet;  use Apache::lonnet;
 use Mail::Send;  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.  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 $clientname; # LonCAPA name of client.
 my $clientversion;              # LonCAPA version running on client.  my $clientversion;              # LonCAPA version running on client.
 my $clienthomedom;              # LonCAPA domain of homeID for 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;  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 %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;  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},
                  instunamemapcheck => {remote => 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,},
                  lti => {institutiononly => 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},
                  unamemaprules => {remote => 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.  #   Statistics that are maintained and dislayed in the status line.
 #  #
 my $Transactions = 0; # Number of attempted transactions.  my $Transactions = 0; # Number of attempted transactions.
Line 254  sub SSLConnection { Line 436  sub SSLConnection {
     Debug("Approving promotion -> ssl");      Debug("Approving promotion -> ssl");
     #  And do so:      #  And do so:
   
       my $CRLFile;
       unless ($crlchecked{$clientname}) {
           $CRLFile = lonssl::CRLFile();
           $crlchecked{$clientname} = 1;
       }
   
     my $SSLSocket = lonssl::PromoteServerSocket($Socket,      my $SSLSocket = lonssl::PromoteServerSocket($Socket,
  $CACertificate,   $CACertificate,
  $Certificate,   $Certificate,
  $KeyFile);   $KeyFile,
    $clientname,
                                                   $CRLFile,
                                                   $clientversion);
     if(! ($SSLSocket) ) { # SSL socket promotion failed.      if(! ($SSLSocket) ) { # SSL socket promotion failed.
  my $err = lonssl::LastError();   my $err = lonssl::LastError();
  &logthis("<font color=\"red\"> CRITICAL "   &logthis("<font color=\"red\"> CRITICAL "
Line 297  sub InsecureConnection { Line 488  sub InsecureConnection {
     my $Socket  =  shift;      my $Socket  =  shift;
   
     #   Don't even start if insecure connections are not allowed.      #   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;   return 0;
     }      }
   
Line 598  sub ConfigFileFromSelector { Line 804  sub ConfigFileFromSelector {
     my $selector   = shift;      my $selector   = shift;
     my $tablefile;      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;      return $tablefile;
 }  }
Line 621  sub ConfigFileFromSelector { Line 834  sub ConfigFileFromSelector {
 #     String to send to client ("ok" or "refused" if bad file).  #     String to send to client ("ok" or "refused" if bad file).
 #  #
 sub PushFile {  sub PushFile {
     my $request = shift;          my $request = shift;
     my ($command, $filename, $contents) = split(":", $request, 3);      my ($command, $filename, $contents) = split(":", $request, 3);
     &Debug("PushFile");      &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  ($filename eq host).      #   hosts.tab  ($filename eq host).
     #   domain.tab ($filename eq domain).      #   domain.tab ($filename eq domain).
     #   dns_hosts.tab ($filename eq dns_host).      #   dns_hosts.tab ($filename eq dns_host).
     #   dns_domain.tab ($filename eq dns_domain).       #   dns_domain.tab ($filename eq dns_domain).
       #   loncapaCAcrl.pem ($filename eq loncapaCAcrl).
     # Construct the destination filename or reject the request.      # Construct the destination filename or reject the request.
     #      #
     # lonManage is supposed to ensure this, however this session could be      # lonManage is supposed to ensure this, however this session could be
Line 651  sub PushFile { Line 865  sub PushFile {
   
     if($filename eq "host") {      if($filename eq "host") {
  $contents = AdjustHostContents($contents);   $contents = AdjustHostContents($contents);
       } elsif (($filename eq 'dns_hosts') || ($filename eq 'dns_domain') ||
                ($filename eq 'loncapaCAcrl')) {
           if ($contents eq '') {
               &logthis('<font color="red"> Pushfile: unable to install '
                       .$tablefile." - no data received from push. </font>");
               return 'error: push had no data';
           }
           if (&Apache::lonnet::get_host_ip($clientname)) {
               my $clienthost = &Apache::lonnet::hostname($clientname);
               if ($managers{$clientip} eq $clientname) {
                   my $clientprotocol = $Apache::lonnet::protocol{$clientname};
                   $clientprotocol = 'http' if ($clientprotocol ne 'https');
                   my $url;
                   if ($filename eq 'loncapaCAcrl') {
                       $url = '/adm/dns/loncapaCRL';
                   } else {
                       $url = '/adm/'.$filename;
                       $url =~ s{_}{/};
                   }
                   my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
                   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>");
                       return 'error: pull failed';
                   } else {
                       my $result = $response->content;
                       chomp($result);
                       unless ($result eq $contents) {
                           &logthis('<font color="red"> Pushfile: unable to install '
                                   .$tablefile." - pushed data and pulled data differ. </font>");
                           my $pushleng = length($contents);
                           my $pullleng = length($result);
                           if ($pushleng != $pullleng) {
                               return "error: $pushleng vs $pullleng bytes";
                           } else {
                               return "error: mismatch push and pull";
                           }
                       }
                   }
               }
           }
     }      }
   
     #  Install the new file:      #  Install the new file:
Line 1384  sub du2_handler { Line 1640  sub du2_handler {
 #    selected directory the filename followed by the full output of  #    selected directory the filename followed by the full output of
 #    the stat function is returned.  The returned info for each  #    the stat function is returned.  The returned info for each
 #    file are separated by ':'.  The stat fields are separated by &'s.  #    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:  # Parameters:
 #    $cmd        - The command that dispatched us (ls).  #    $cmd        - The command that dispatched us (ls).
 #    $ulsdir     - The directory path to list... I'm not sure what this  #    $ulsdir     - The directory path to list... I'm not sure what this
Line 1405  sub ls_handler { Line 1677  sub ls_handler {
     my $rights;      my $rights;
     my $ulsout='';      my $ulsout='';
     my $ulsfn;      my $ulsfn;
       if ($ulsdir =~m{/\.\./}) {
           &Failure($client,"refused\n",$userinput);
           return 1;
       }
     if (-e $ulsdir) {      if (-e $ulsdir) {
  if(-d $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,$ulsdir)) {      if (opendir(LSDIR,$ulsdir)) {
  while ($ulsfn=readdir(LSDIR)) {   while ($ulsfn=readdir(LSDIR)) {
     undef($obs);      undef($obs);
Line 1430  sub ls_handler { Line 1711  sub ls_handler {
  closedir(LSDIR);   closedir(LSDIR);
     }      }
  } else {   } 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($ulsdir);      my @ulsstats=stat($ulsdir);
     $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';      $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
  }   }
Line 1454  sub ls_handler { Line 1740  sub ls_handler {
 #    selected directory the filename followed by the full output of  #    selected directory the filename followed by the full output of
 #    the stat function is returned.  The returned info for each  #    the stat function is returned.  The returned info for each
 #    file are separated by ':'.  The stat fields are separated by &'s.  #    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:  # Parameters:
 #    $cmd        - The command that dispatched us (ls).  #    $cmd        - The command that dispatched us (ls).
 #    $ulsdir     - The directory path to list... I'm not sure what this  #    $ulsdir     - The directory path to list... I'm not sure what this
Line 1474  sub ls2_handler { Line 1776  sub ls2_handler {
     my $rights;      my $rights;
     my $ulsout='';      my $ulsout='';
     my $ulsfn;      my $ulsfn;
       if ($ulsdir =~m{/\.\./}) {
           &Failure($client,"refused\n",$userinput);
           return 1;
       }
     if (-e $ulsdir) {      if (-e $ulsdir) {
         if(-d $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,$ulsdir)) {              if (opendir(LSDIR,$ulsdir)) {
                 while ($ulsfn=readdir(LSDIR)) {                  while ($ulsfn=readdir(LSDIR)) {
                     undef($obs);                      undef($obs);
Line 1500  sub ls2_handler { Line 1811  sub ls2_handler {
                 closedir(LSDIR);                  closedir(LSDIR);
             }              }
         } else {          } 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($ulsdir);              my @ulsstats=stat($ulsdir);
             $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';              $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
         }          }
Line 1516  sub ls2_handler { Line 1832  sub ls2_handler {
 #    selected directory the filename followed by the full output of  #    selected directory the filename followed by the full output of
 #    the stat function is returned.  The returned info for each  #    the stat function is returned.  The returned info for each
 #    file are separated by ':'.  The stat fields are separated by &'s.  #    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:  # Parameters:
 #    $cmd        - The command that dispatched us (ls).  #    $cmd        - The command that dispatched us (ls).
 #    $tail       - The tail of the request that invoked us.  #    $tail       - The tail of the request that invoked us.
Line 1555  sub ls3_handler { Line 1890  sub ls3_handler {
     }      }
   
     my $dir_root = $perlvar{'lonDocRoot'};      my $dir_root = $perlvar{'lonDocRoot'};
     if ($getpropath) {      if (($getpropath) || ($getuserdir)) {
         if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {          if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
             $dir_root = &propath($udom,$uname);              $dir_root = &propath($udom,$uname);
             $dir_root =~ s/\/$//;              $dir_root =~ s/\/$//;
         } else {          } 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:$tail");  
             return 1;              return 1;
         }          }
     } elsif ($alternate_root ne '') {      } elsif ($alternate_root ne '') {
Line 1583  sub ls3_handler { Line 1908  sub ls3_handler {
             $ulsdir = $dir_root.'/'.$ulsdir;              $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 $obs;
     my $rights;      my $rights;
     my $ulsout='';      my $ulsout='';
     my $ulsfn;      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 (-e $ulsdir) {
         if(-d $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)) {                  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($obs);
                     undef($rights);                      undef($rights);
                     my @ulsstats=stat($ulsdir.'/'.$ulsfn);                      my @ulsstats=stat($ulsdir.'/'.$ulsfn);
Line 1613  sub ls3_handler { Line 1980  sub ls3_handler {
                 closedir(LSDIR);                  closedir(LSDIR);
             }              }
         } else {          } else {
               unless (($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);              my @ulsstats=stat($ulsdir);
             $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';              $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
         }          }
Line 1636  sub read_lonnet_global { Line 2010  sub read_lonnet_global {
                       );                        );
     my %limit_to = (      my %limit_to = (
                     perlvar => {                      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($requested) eq 'HASH') {      if (ref($requested) eq 'HASH') {
Line 1663  sub read_lonnet_global { Line 2039  sub read_lonnet_global {
                 }                  }
                 if ($what eq 'perlvar') {                  if ($what eq 'perlvar') {
                     if (!exists($packagevars{$what}{'lonBalancer'})) {                      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');                              my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
                             if (ref($othervarref) eq 'HASH') {                              if (ref($othervarref) eq 'HASH') {
                                 $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};                                  $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
Line 1756  sub server_distarch_handler { Line 2132  sub server_distarch_handler {
 }  }
 &register_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);  &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  #   Process a reinit request.  Reinit requests that either
 #   lonc or lond be reinitialized so that an updated   #   lonc or lond be reinitialized so that an updated 
 #   host.tab or domain.tab can be processed.  #   host.tab or domain.tab can be processed.
Line 1888  sub authenticate_handler { Line 2274  sub authenticate_handler {
                 my ($remote,$hosted);                  my ($remote,$hosted);
                 my $remotesession = &get_usersession_config($udom,'remotesession');                  my $remotesession = &get_usersession_config($udom,'remotesession');
                 if (ref($remotesession) eq 'HASH') {                  if (ref($remotesession) eq 'HASH') {
                     $remote = $remotesession->{'remote'}                      $remote = $remotesession->{'remote'};
                 }                  }
                 my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');                  my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
                 if (ref($hostedsession) eq 'HASH') {                  if (ref($hostedsession) eq 'HASH') {
                     $hosted = $hostedsession->{'hosted'};                      $hosted = $hostedsession->{'hosted'};
                 }                  }
                 my $loncaparev = $clientversion;  
                 if ($loncaparev eq '') {  
                     $loncaparev = $Apache::lonnet::loncaparevs{$clientname};  
                 }  
                 $canhost = &Apache::lonnet::can_host_session($udom,$clientname,                  $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
                                                              $loncaparev,                                                               $clientversion,
                                                              $remote,$hosted);                                                               $remote,$hosted);
             }              }
         }          }
Line 1975  sub change_password_handler { Line 2357  sub change_password_handler {
     }      }
     if($validated) {      if($validated) {
  my $realpasswd  = &get_auth_type($udom, $uname); # Defined since authd.   my $realpasswd  = &get_auth_type($udom, $uname); # Defined since authd.
   
  my ($howpwd,$contentpwd)=split(/:/,$realpasswd);   my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
           my $notunique;
  if ($howpwd eq 'internal') {   if ($howpwd eq 'internal') {
     &Debug("internal auth");      &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";   my $msg="Result of password change for $uname: pwchange_success";
                 if ($lonhost) {                  if ($lonhost) {
                     $msg .= " - request originated from: $lonhost";                      $msg .= " - request originated from: $lonhost";
                 }                  }
                 &logthis($msg);                  &logthis($msg);
                   &update_passwd_history($uname,$udom,$howpwd,$context);
  &Reply($client, "ok\n", $userinput);   &Reply($client, "ok\n", $userinput);
     } else {      } else {
  &logthis("Unable to open $uname passwd "                  &logthis("Unable to open $uname passwd "               
Line 1996  sub change_password_handler { Line 2449  sub change_password_handler {
     }      }
  } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {   } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
     my $result = &change_unix_password($uname, $npass);      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: ".      &logthis("Result of password change for $uname: ".
      $result);       $result);
     &Reply($client, \$result, $userinput);      &Reply($client, \$result, $userinput);
Line 2006  sub change_password_handler { Line 2462  sub change_password_handler {
     #      #
     &Failure( $client, "auth_mode_error\n", $userinput);      &Failure( $client, "auth_mode_error\n", $userinput);
  }     }  
   
     } else {      } else {
  if ($failure eq '') {   if ($failure eq '') {
     $failure = 'non_authorized';      $failure = 'non_authorized';
Line 2018  sub change_password_handler { Line 2473  sub change_password_handler {
 }  }
 &register_handler("passwd", \&change_password_handler, 1, 1, 0);  &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.  #   Create a new user.  User in this case means a lon-capa user.
 #   The user must either already exist in some authentication realm  #   The user must either already exist in some authentication realm
Line 2061  sub add_user_handler { Line 2548  sub add_user_handler {
     ."makeuser";      ."makeuser";
     }      }
     unless ($fperror) {      unless ($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, $userinput);     #BUGBUG - could be fail   &Reply($client,\$result, $userinput);     #BUGBUG - could be fail
     } else {      } else {
  &Failure($client, \$fperror, $userinput);   &Failure($client, \$fperror, $userinput);
Line 2130  sub change_authentication_handler { Line 2618  sub change_authentication_handler {
  my $result = &change_unix_password($uname, $npass);   my $result = &change_unix_password($uname, $npass);
  &logthis("Result of password change for $uname: ".$result);   &logthis("Result of password change for $uname: ".$result);
  if ($result eq "ok") {   if ($result eq "ok") {
                       &update_passwd_history($uname,$udom,$umode,'changeuserauth'); 
     &Reply($client, \$result);      &Reply($client, \$result);
  } else {   } else {
     &Failure($client, \$result);      &Failure($client, \$result);
  }   }
     } else {      } 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   #  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,   #  unix, or krb*,  and the user is an author for this domain,
Line 2156  sub change_authentication_handler { Line 2646  sub change_authentication_handler {
 }  }
 &register_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);  &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;
   }
   
   sub inst_unamemap_check {
       my ($cmd, $tail, $client)   = @_;
       my $userinput               = "$cmd:$tail";
       my %rulecheck;
       my $outcome;
       my ($udom,$uname,@rules) = split(/:/,$tail);
       $udom = &unescape($udom);
       $uname = &unescape($uname);
       @rules = map {&unescape($_);} (@rules);
       eval {
           local($SIG{__DIE__})='DEFAULT';
           $outcome = &localenroll::unamemap_check($udom,$uname,\@rules,\%rulecheck);
       };
       if (!$@) {
           if ($outcome eq 'ok') {
               my $result='';
               foreach my $key (keys(%rulecheck)) {
                   $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
               }
               &Reply($client,\$result,$userinput);
           } else {
               &Reply($client,"error\n", $userinput);
           }
       } else {
           &Failure($client,"unknown_cmd\n",$userinput);
       }
   }
   &register_handler("instunamemapcheck",\&inst_unamemap_check,0,1,0);
   
   
 #  #
 #   Determines if this is the home server for a user.  The home server  #   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  #   for a user will have his/her lon-capa passwd file.  Therefore all we need
Line 2237  sub update_resource_handler { Line 2768  sub update_resource_handler {
  my $transname="$fname.in.transfer";   my $transname="$fname.in.transfer";
  my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");   my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
  my $response;   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 ($response->is_error()) {   if ($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;      my $message=$response->status_line;
     &logthis("LWP GET: $message for $fname ($remoteurl)");      &logthis("LWP GET: $message for $fname ($remoteurl)");
  } else {   } else {
     if ($remoteurl!~/\.meta$/) {      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                      # we successfully transfered, copy file over to real name
     rename($transname,$fname);      rename($transname,$fname);
Line 2334  sub fetch_user_file_handler { Line 2857  sub fetch_user_file_handler {
  my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;   my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
  my $response;   my $response;
  Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");   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()) {   if ($response->is_error()) {
     unlink($transname);      unlink($transname);
     my $message=$response->status_line;      my $message=$response->status_line;
Line 2407  sub remove_user_file_handler { Line 2930  sub remove_user_file_handler {
     if (-e $file) {      if (-e $file) {
  #   #
  #   If the file is a regular file unlink is fine...   #   If the file is a regular file unlink is fine...
  #   However it's possible the client wants a dir.   #   However it's possible the client wants a dir 
  #   removed, in which case rmdir is more approprate:   #   removed, in which case rmdir is more appropriate.
    #   Note: rmdir will only remove an empty directory.
  #   #
         if (-f $file){          if (-f $file){
     unlink($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;
                           if (-e $file.'.bak') {
                               unlink($file.'.bak');
                           }
                       }
  } elsif(-d $file) {   } elsif(-d $file) {
     rmdir($file);      rmdir($file);
  }   }
Line 2540  sub user_has_session_handler { Line 3072  sub user_has_session_handler {
 }  }
 &register_handler("userhassession", \&user_has_session_handler, 0,1,0);  &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   #  Authenticate access to a user file by checking that the token the user's 
 #  passed also exists in their session file  #  passed also exists in their session file
Line 2774  sub newput_user_profile_entry { Line 3354  sub newput_user_profile_entry {
     foreach my $pair (@pairs) {      foreach my $pair (@pairs) {
  my ($key,$value)=split(/=/,$pair);   my ($key,$value)=split(/=/,$pair);
  if (exists($hashref->{$key})) {   if (exists($hashref->{$key})) {
     &Failure($client, "key_exists: ".$key."\n",$userinput);              if (!&untie_user_hash($hashref)) {
     return 1;                  &logthis("error: ".($!+0)." untie (GDBM) failed ".
                            "while attempting newput - early out as key exists");
               }
               &Failure($client, "key_exists: ".$key."\n",$userinput);
               return 1;
  }   }
     }      }
   
Line 3025  sub get_profile_entry { Line 3609  sub get_profile_entry {
 #  #
 #  Parameters:  #  Parameters:
 #     $cmd               - Command keyword of request (eget).  #     $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.  #     $client            - File open on the client.
 #  Returns:  #  Returns:
 #     1      - Continue processing  #     1      - Continue processing
Line 3177  sub get_profile_keys { Line 3762  sub get_profile_keys {
 sub dump_profile_database {  sub dump_profile_database {
     my ($cmd, $tail, $client) = @_;      my ($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 $userinput = "$cmd:$tail";
         
     my ($udom,$uname,$namespace) = split(/:/,$tail);      my ($udom,$uname,$namespace) = split(/:/,$tail);
Line 3256  sub dump_with_regexp { Line 3852  sub dump_with_regexp {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
   
     my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);      my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
       
     if ($res =~ /^error:/) {      if ($res =~ /^error:/) {
         &Failure($client, \$res, "$cmd:$tail");          Failure($client, \$res, "$cmd:$tail");
     } else {      } else {
         &Reply($client, \$res, "$cmd:$tail");          Reply($client, \$res, "$cmd:$tail");
     }      }
   
     return 1;      return 1;
 }  }
 &register_handler("dump", \&dump_with_regexp, 0, 1, 0);  &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,
                                                            8)));
               }
               &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.  #  Store a set of key=value pairs associated with a versioned name.
 #  #
 #  Parameters:  #  Parameters:
Line 3277  sub dump_with_regexp { Line 3914  sub dump_with_regexp {
 #                          namespace   - Name of the database being modified  #                          namespace   - Name of the database being modified
 #                          rid         - Resource keyword to modify.  #                          rid         - Resource keyword to modify.
 #                          what        - new value associated with rid.  #                          what        - new value associated with rid.
   #                          laststore   - (optional) version=timestamp
   #                                        for most recent transaction for rid
   #                                        in namespace, when cstore was called
 #  #
 #    $client             - Socket open on the client.  #    $client             - Socket open on the client.
 #  #
Line 3285  sub dump_with_regexp { Line 3925  sub dump_with_regexp {
 #      1 (keep on processing).  #      1 (keep on processing).
 #  Side-Effects:  #  Side-Effects:
 #    Writes to the client  #    Writes to the client
   #    Successful storage will cause either 'ok', or, if $laststore was included
   #    in the tail of the request, and the version number for the last transaction
   #    is larger than the version in $laststore, delay:$numtrans , where $numtrans
   #    is the number of store evevnts recorded for rid in namespace since
   #    lonnet::store() was called by the client.
   #
 sub store_handler {  sub store_handler {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
     
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
       chomp($tail);
     my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);      my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
     if ($namespace ne 'roles') {      if ($namespace ne 'roles') {
   
  chomp($what);  
  my @pairs=split(/\&/,$what);   my @pairs=split(/\&/,$what);
  my $hashref  = &tie_user_hash($udom, $uname, $namespace,   my $hashref  = &tie_user_hash($udom, $uname, $namespace,
        &GDBM_WRCREAT(), "S",         &GDBM_WRCREAT(), "S",
        "$rid:$what");         "$rid:$what");
  if ($hashref) {   if ($hashref) {
     my $now = time;      my $now = time;
     my @previouskeys=split(/&/,$hashref->{"keys:$rid"});              my $numtrans;
     my $key;              if ($laststore) {
                   my ($previousversion,$previoustime) = split(/\=/,$laststore);
                   my ($lastversion,$lasttime) = (0,0);
                   $lastversion = $hashref->{"version:$rid"};
                   if ($lastversion) {
                       $lasttime = $hashref->{"$lastversion:$rid:timestamp"};
                   }
                   if (($previousversion) && ($previousversion !~ /\D/)) {
                       if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) {
                           $numtrans = $lastversion - $previousversion;
                       }
                   } elsif ($lastversion) {
                       $numtrans = $lastversion;
                   }
                   if ($numtrans) {
                       $numtrans =~ s/D//g;
                   }
               }
     $hashref->{"version:$rid"}++;      $hashref->{"version:$rid"}++;
     my $version=$hashref->{"version:$rid"};      my $version=$hashref->{"version:$rid"};
     my $allkeys='';       my $allkeys=''; 
Line 3314  sub store_handler { Line 3976  sub store_handler {
     $allkeys.='timestamp';      $allkeys.='timestamp';
     $hashref->{"$version:keys:$rid"}=$allkeys;      $hashref->{"$version:keys:$rid"}=$allkeys;
     if (&untie_user_hash($hashref)) {      if (&untie_user_hash($hashref)) {
  &Reply($client, "ok\n", $userinput);                  my $msg = 'ok';
                   if ($numtrans) {
                       $msg = 'delay:'.$numtrans;
                   }
    &Reply($client, "$msg\n", $userinput);
     } else {      } else {
  &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".   &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
  "while attempting store\n", $userinput);   "while attempting store\n", $userinput);
Line 3557  sub retrieve_chat_handler { Line 4223  sub retrieve_chat_handler {
 #  serviced.  #  serviced.
 #  #
 #  Parameters:  #  Parameters:
 #     $cmd       - COmmand keyword that initiated the request.  #     $cmd       - Command keyword that initiated the request.
 #     $tail      - Remainder of the command after the keyword.  #     $tail      - Remainder of the command after the keyword.
 #                  For this function, this consists of a query and  #                  For this function, this consists of a query and
 #                  3 arguments that are self-documentingly labelled  #                  3 arguments that are self-documentingly labelled
Line 3571  sub retrieve_chat_handler { Line 4237  sub retrieve_chat_handler {
 sub send_query_handler {  sub send_query_handler {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
   
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);      my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
     $query=~s/\n*$//g;      $query=~s/\n*$//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".      &Reply($client, "". &sql_reply("$clientname\&$query".
  "\&$arg1"."\&$arg2"."\&$arg3")."\n",   "\&$arg1"."\&$arg2"."\&$arg3")."\n",
   $userinput);    $userinput);
Line 3830  sub put_course_id_hash_handler { Line 4526  sub put_course_id_hash_handler {
 #                 creationcontext - include courses created in specified context   #                 creationcontext - include courses created in specified context 
 #  #
 #                 domcloner - flag to indicate if user can create CCs in course's domain.  #                 domcloner - flag to indicate if user can create CCs in course's domain.
 #                             If so, ability to clone course is automatic.   #                             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.  #     $client  - The socket open on the client.
 # Returns:  # Returns:
Line 3839  sub put_course_id_hash_handler { Line 4537  sub put_course_id_hash_handler {
 #   a reply is written to $client.  #   a reply is written to $client.
 sub dump_course_id_handler {  sub dump_course_id_handler {
     my ($cmd, $tail, $client) = @_;      my ($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 $userinput = "$cmd:$tail";
   
     my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,      my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
         $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,          $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
         $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,          $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
         $creationcontext,$domcloner) =split(/:/,$tail);          $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail);
     my $now = time;      my $now = time;
     my ($cloneruname,$clonerudom,%cc_clone);      my ($cloneruname,$clonerudom,%cc_clone);
     if (defined($description)) {      if (defined($description)) {
Line 3917  sub dump_course_id_handler { Line 4626  sub dump_course_id_handler {
     } else {      } else {
         $creationcontext = '.';          $creationcontext = '.';
     }      }
       unless ($hasuniquecode) {
           $hasuniquecode = '.';
       }
     my $unpack = 1;      my $unpack = 1;
     if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&       if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' && 
         $typefilter eq '.') {          $typefilter eq '.') {
Line 4005  sub dump_course_id_handler { Line 4717  sub dump_course_id_handler {
                 $selfenroll_end = $items->{'selfenroll_end_date'};                  $selfenroll_end = $items->{'selfenroll_end_date'};
                 $created = $items->{'created'};                  $created = $items->{'created'};
                 $context = $items->{'context'};                  $context = $items->{'context'};
                   if ($hasuniquecode ne '.') {
                       next unless ($items->{'uniquecode'});
                   }
                 if ($selfenrollonly) {                  if ($selfenrollonly) {
                     next if (!$selfenroll_types);                      next if (!$selfenroll_types);
                     if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {                      if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
Line 4237  sub course_lastaccess_handler { Line 4952  sub course_lastaccess_handler {
 }  }
 &register_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);  &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   # Puts an unencrypted entry in a namespace db file at the domain level 
 #  #
Line 4280  sub put_domain_handler { Line 5033  sub put_domain_handler {
 }  }
 &register_handler("putdom", \&put_domain_handler, 0, 1, 0);  &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.  # Unencrypted get from the namespace database file at the domain level.
 # This function retrieves a keyed item from a specific named database in the  # This function retrieves a keyed item from a specific named database in the
 # domain directory.  # domain directory.
 #  #
 # Parameters:  # Parameters:
 #   $cmd             - Command request keyword (get).  #   $cmd             - Command request keyword (getdom).
 #   $tail            - Tail of the command.  This is a colon separated list  #   $tail            - Tail of the command.  This is a colon separated list
 #                      consisting of the domain and the 'namespace'   #                      consisting of the domain and the 'namespace' 
 #                      which selects the gdbm file to do the lookup in,  #                      which selects the gdbm file to do the lookup in,
Line 4302  sub put_domain_handler { Line 5171  sub put_domain_handler {
 sub get_domain_handler {  sub get_domain_handler {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
   
       my $userinput = "$cmd:$tail";
     my $userinput = "$client:$tail";  
   
     my ($udom,$namespace,$what)=split(/:/,$tail,3);      my ($udom,$namespace,$what)=split(/:/,$tail,3);
     chomp($what);      if (($namespace =~ /^enc/) || ($namespace eq 'private')) {
     my @queries=split(/\&/,$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 {          } 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;      return 1;
Line 4331  sub get_domain_handler { Line 5190  sub get_domain_handler {
 &register_handler("getdom", \&get_domain_handler, 0, 1, 0);  &register_handler("getdom", \&get_domain_handler, 0, 1, 0);
   
 #  #
   # Encrypted 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 (egetdom).
   #   $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,
   #                      & separated list of keys to lookup.  Note that
   #                      the values are returned as an & separated list too.
   #   $client          - File descriptor open on the client.
   # Returns:
   #   1       - Continue processing.
   #   0       - Exit.
   #  Side effects:
   #     reply is encrypted before being written to $client.
   #
   sub encrypted_get_domain_handler {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput = "$cmd:$tail";
   
       my ($udom,$namespace,$what) = split(/:/,$tail,3);
       if ($namespace eq 'private') {
           &Failure( $client, "refused\n", $userinput);
       } else {
           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,
                                                                8)));
                   }
                   &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);
   
   #
   # Encrypted 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 (lti).
   #   $tail            - Tail of the command.  This is a colon-separated list
   #                      consisting of the domain, coursenum, if for LTI-
   #                      enabled deep-linking to course content using
   #                      link protection configured within a course,
   #                      context (=deeplink) if for LTI-enabled deep-linking
   #                      to course content using LTI Provider settings
   #                      configured within a course's domain, the (escaped)
   #                      launch URL, the (escaped) method (typically POST),
   #                      and a frozen hash of the LTI launch parameters
   #                      from the LTI payload.
   #   $client          - File descriptor open on the client.
   # Returns:
   #   1       - Continue processing.
   #   0       - Exit.
   #  Side effects:
   #     The reply will contain an LTI itemID, if the signed LTI payload
   #     could be verified using the consumer key and the shared secret 
   #     available for that key (for the itemID) for either the course or domain, 
   #     depending on values for cnum and context. The reply is encrypted before 
   #     being written to $client.
   #
   sub lti_handler {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput = "$cmd:$tail";
   
       my ($cdom,$cnum,$context,$escurl,$escmethod,$items) = split(/:/,$tail);
       my $url = &unescape($escurl);
       my $method = &unescape($escmethod);
       my $params = &Apache::lonnet::thaw_unescape($items);
       my $res;
       if ($cnum ne '') {
           $res = &LONCAPA::Lond::crslti_itemid($cdom,$cnum,$url,$method,$params,$perlvar{'lonVersion'});
       } else {
           $res = &LONCAPA::Lond::domlti_itemid($cdom,$context,$url,$method,$params,$perlvar{'lonVersion'});
       }
       if ($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,
                                                            8)));
               }
               &Reply( $client,"enc:$cmdlength:$encres\n",$userinput);
           } else {
               &Failure( $client, "error:no_key\n",$userinput);
           }
       }
       return 1;
   }
   &register_handler("lti", \&lti_handler, 1, 1, 0);
   
   #
 #  Puts an id to a domains id database.   #  Puts an id to a domains id database. 
 #  #
 #  Parameters:  #  Parameters:
Line 4439  sub get_id_handler { Line 5415  sub get_id_handler {
 # Returns:  # Returns:
 #     1   - Continue processing  #     1   - Continue processing
 #     0   - Exit server.  #     0   - Exit server.
 #  #     
 #  #
   
 sub del_id_handler {  sub del_id_handler {
Line 4755  sub tmp_put_handler { Line 5731  sub tmp_put_handler {
     }      }
     my ($id,$store);      my ($id,$store);
     $tmpsnum++;      $tmpsnum++;
     if (($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().$$.$tmpsnum));
               $numtries ++;
           }
     } else {      } else {
         $id = $$.'_'.$clientip.'_'.$tmpsnum;          $id = $$.'_'.$clientip.'_'.$tmpsnum;
     }      }
     $id=~s/\W/\_/g;      $id=~s/\W/\_/g;
     $record=~s/\n//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;   print $store $record;
  close $store;   close $store;
  &Reply($client, \$id, $userinput);   &Reply($client, \$id, $userinput);
Line 4846  sub tmp_del_handler { Line 5830  sub tmp_del_handler {
 &register_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);  &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  #   Processes the setannounce command.  This command
 #   creates a file named announce.txt in the top directory of  #   creates a file named announce.txt in the top directory of
 #   the documentn root and sets its contents.  The announce.txt file is  #   the documentn root and sets its contents.  The announce.txt file is
Line 5028  sub validate_instcode_handler { Line 6122  sub validate_instcode_handler {
 }  }
 &register_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);  &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.  #   Get the official sections for which auto-enrollment is possible.
 #   Since the admin people won't know about 'unofficial sections'   #   Since the admin people won't know about 'unofficial sections' 
 #   we cannot auto-enroll on them.  #   we cannot auto-enroll on them.
Line 5124  sub validate_course_section_handler { Line 6251  sub validate_course_section_handler {
 # Formal Parameters:  # Formal Parameters:
 #    $cmd     - The command request that got us dispatched.  #    $cmd     - The command request that got us dispatched.
 #    $tail    - The tail of the command.   In this case this is a colon separated  #    $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     #               $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  #               $cdom        - The domain of the course from the institution's
 #                              point of view.  #                              point of view.
 #    $client  - The socket open on the client.  #    $client  - The socket open on the client.
Line 5151  sub validate_class_access_handler { Line 6279  sub validate_class_access_handler {
 &register_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);  &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.  #   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  #   Only used for case where authentication method for new user is localauth
 #  #
Line 5185  sub create_auto_enroll_password_handler Line 6419  sub create_auto_enroll_password_handler
 &register_handler("autocreatepassword", \&create_auto_enroll_password_handler,   &register_handler("autocreatepassword", \&create_auto_enroll_password_handler, 
   0, 1, 0);    0, 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,
                                                                   8)));
                   }
                   &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, 1, 0);
   
 #   Retrieve and remove temporary files created by/during autoenrollment.  #   Retrieve and remove temporary files created by/during autoenrollment.
 #  #
 # Formal Parameters:  # Formal Parameters:
 #    $cmd      - The command that got us dispatched.  #    $cmd      - The command that got us dispatched.
 #    $tail     - The tail of the command.  In our case this is a colon   #    $tail     - The tail of the command.  In our case this is a colon 
 #                separated list that will be split into:  #                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 filename is given as a path relative to
 #                            the LonCAPA temp file directory.  #                            the LonCAPA temp file directory.
 #    $client   - Socket open on the client.  #    $client   - Socket open on the client.
Line 5205  sub retrieve_auto_file_handler { Line 6484  sub retrieve_auto_file_handler {
     my ($filename)   = split(/:/, $tail);      my ($filename)   = split(/:/, $tail);
   
     my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;      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 = '';   my $reply = '';
  if (open(my $fh,$source)) {   if (open(my $fh,$source)) {
     while (<$fh>) {      while (<$fh>) {
Line 5237  sub crsreq_checks_handler { Line 6521  sub crsreq_checks_handler {
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
     my $dom = $tail;      my $dom = $tail;
     my $result;      my $result;
     my @reqtypes = ('official','unofficial','community');      my @reqtypes = ('official','unofficial','community','textbook','placement');
     eval {      eval {
         local($SIG{__DIE__})='DEFAULT';          local($SIG{__DIE__})='DEFAULT';
         my %validations;          my %validations;
Line 5264  sub crsreq_checks_handler { Line 6548  sub crsreq_checks_handler {
 sub validate_crsreq_handler {  sub validate_crsreq_handler {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
     my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist) = split(/:/, $tail);      my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail);
     $instcode = &unescape($instcode);      $instcode = &unescape($instcode);
     $owner = &unescape($owner);      $owner = &unescape($owner);
     $crstype = &unescape($crstype);      $crstype = &unescape($crstype);
     $inststatuslist = &unescape($inststatuslist);      $inststatuslist = &unescape($inststatuslist);
     $instcode = &unescape($instcode);      $instcode = &unescape($instcode);
     $instseclist = &unescape($instseclist);      $instseclist = &unescape($instseclist);
       my $custominfo = &Apache::lonnet::thaw_unescape($customdata);
     my $outcome;      my $outcome;
     eval {      eval {
         local($SIG{__DIE__})='DEFAULT';          local($SIG{__DIE__})='DEFAULT';
         $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,          $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
                                                  $inststatuslist,$instcode,                                                   $inststatuslist,$instcode,
                                                  $instseclist);                                                   $instseclist,$custominfo);
     };      };
     if (!$@) {      if (!$@) {
         &Reply($client, \$outcome, $userinput);          &Reply($client, \$outcome, $userinput);
Line 5287  sub validate_crsreq_handler { Line 6572  sub validate_crsreq_handler {
 }  }
 &register_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);  &register_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
   
   sub crsreq_update_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
       my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code,
           $accessstart,$accessend,$infohashref) =
           split(/:/, $tail);
       $crstype = &unescape($crstype);
       $action = &unescape($action);
       $ownername = &unescape($ownername);
       $ownerdomain = &unescape($ownerdomain);
       $fullname = &unescape($fullname);
       $title = &unescape($title);
       $code = &unescape($code);
       $accessstart = &unescape($accessstart);
       $accessend = &unescape($accessend);
       my $incoming = &Apache::lonnet::thaw_unescape($infohashref);
       my ($result,$outcome);
       eval {
           local($SIG{__DIE__})='DEFAULT';
           my %rtnhash;
           $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action,
                                                   $ownername,$ownerdomain,$fullname,
                                                   $title,$code,$accessstart,$accessend,
                                                   $incoming,\%rtnhash);
           if ($outcome eq 'ok') {
               my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
               foreach my $key (keys(%rtnhash)) {
                   if (grep(/^\Q$key\E/,@posskeys)) {
                       $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
                   }
               }
               $result =~ s/\&$//;
           }
       };
       if (!$@) {
           if ($outcome eq 'ok') {
               &Reply($client, \$result, $userinput);
           } else {
               &Reply($client, "format_error\n", $userinput);
           }
       } else {
           &Failure($client,"unknown_cmd\n",$userinput);
       }
       return 1;
   }
   &register_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0);
   
 #  #
 #   Read and retrieve institutional code format (for support form).  #   Read and retrieve institutional code format (for support form).
 # Formal Parameters:  # Formal Parameters:
Line 5506  sub get_institutional_selfcreate_rules { Line 6838  sub get_institutional_selfcreate_rules {
 }  }
 &register_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);  &register_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0);
   
   sub get_unamemap_rules {
       my ($cmd, $tail, $client)   = @_;
       my $userinput               = "$cmd:$tail";
       my $dom = &unescape($tail);
       my (%rules_hash,@rules_order);
       my $outcome;
       eval {
           local($SIG{__DIE__})='DEFAULT';
           $outcome = &localenroll::unamemap_rules($dom,\%rules_hash,\@rules_order);
       };
       if (!$@) {
           if ($outcome eq 'ok') {
               my $result;
               foreach my $key (keys(%rules_hash)) {
                   $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
               }
               $result =~ s/\&$//;
               $result .= ':';
               if (@rules_order > 0) {
                   foreach my $item (@rules_order) {
                       $result .= &escape($item).'&';
                   }
               }
               $result =~ s/\&$//;
               &Reply($client,\$result,$userinput);
           } else {
               &Reply($client,"error\n", $userinput);
           }
       } else {
           &Failure($client,"unknown_cmd\n",$userinput);
       }
   }
   &register_handler("unamemaprules",\&get_unamemap_rules,0,1,0);
   
 sub institutional_username_check {  sub institutional_username_check {
     my ($cmd, $tail, $client)   = @_;      my ($cmd, $tail, $client)   = @_;
Line 5794  sub get_request { Line 7159  sub get_request {
 #  #
 # Parameters:  # Parameters:
 #    user_input   - The request received from the client (lonc).  #    user_input   - The request received from the client (lonc).
   #
 # Returns:  # Returns:
 #    true to keep processing, false if caller should exit.  #    true to keep processing, false if caller should exit.
 #  #
 sub process_request {  sub process_request {
     my ($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.      my $wasenc    = 0; # True if request was encrypted.
 # ------------------------------------------------------------ See if encrypted  # ------------------------------------------------------------ See if encrypted
     # for command      # for command
Line 5879  sub process_request { Line 7245  sub process_request {
     Debug("Client not privileged to do this operation");      Debug("Client not privileged to do this operation");
     $ok = 0;      $ok = 0;
  }   }
           if ($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($ok) {   if($ok) {
     Debug("Dispatching to handler $command $tail");      Debug("Dispatching to handler $command $tail");
Line 5889  sub process_request { Line 7311  sub process_request {
     Failure($client, "refused\n", $userinput);      Failure($client, "refused\n", $userinput);
     return 1;      return 1;
  }   }
       }
     }      
   
     print $client "unknown_cmd\n";      print $client "unknown_cmd\n";
 # -------------------------------------------------------------------- complete  # -------------------------------------------------------------------- complete
Line 6030  my $wwwid=getpwnam('www'); Line 7451  my $wwwid=getpwnam('www');
 if ($wwwid!=$<) {  if ($wwwid!=$<) {
    my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";     my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
    my $subj="LON: $currenthostid User ID mismatch";     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;     exit 1;
 }  }
   
Line 6147  sub UpdateHosts { Line 7568  sub UpdateHosts {
     #  will take care of new and changed hosts as connections come into being.      #  will take care of new and changed hosts as connections come into being.
   
     &Apache::lonnet::reset_hosts_info();      &Apache::lonnet::reset_hosts_info();
       my %active;
   
     foreach my $child (keys(%children)) {      foreach my $child (keys(%children)) {
  my $childip = $children{$child};   my $childip = $children{$child};
Line 6156  sub UpdateHosts { Line 7578  sub UpdateHosts {
     ." $child for ip $childip </font>");      ." $child for ip $childip </font>");
     kill('INT', $child);      kill('INT', $child);
  } else {   } else {
               $active{$child} = $childip;
     logthis('<font color="green"> keeping child for ip '      logthis('<font color="green"> keeping child for ip '
     ." $childip (pid=$child) </font>");      ." $childip (pid=$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;      ReloadApache;
     &status("Finished reloading hosts.tab");      &status("Finished reloading hosts.tab");
 }  }
   
   
 sub checkchildren {  sub checkchildren {
     &status("Checking on the children (sending signals)");      &status("Checking on the children (sending signals)");
     &initnewstatus();      &initnewstatus();
Line 6234  sub Debug { Line 7703  sub Debug {
 #     reply   - Text to send to client.  #     reply   - Text to send to client.
 #     request - Original request from 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 $reply is a string the caller has to ensure this.
 sub Reply {  sub Reply {
     my ($fd, $reply, $request) = @_;      my ($fd, $reply, $request) = @_;
     if (ref($reply)) {      if (ref($reply)) {
Line 6396  if ($arch eq 'unknown') { Line 7868  if ($arch eq 'unknown') {
     chomp($arch);      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  #   Accept connections.  When a connection comes in, it is validated
 #   and if good, a child process is created to process transactions  #   and if good, a child process is created to process transactions
Line 6479  sub make_new_child { Line 7955  sub make_new_child {
 #        my $tmpsnum=0;            # Now global  #        my $tmpsnum=0;            # Now global
 #---------------------------------------------------- kerberos 5 initialization  #---------------------------------------------------- kerberos 5 initialization
         &Authen::Krb5::init_context();          &Authen::Krb5::init_context();
  unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||    
  ($dist eq 'fedora6') || ($dist eq 'suse9.3') ||          my $no_ets;
                 ($dist eq 'suse12.2') || ($dist eq 'suse12.3')) {          if ($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) {
                   $no_ets = 1;
               }
           } elsif ($dist =~ /^fedora(\d+)$/) {
               if ($1 < 7) {
                   $no_ets = 1;
               }
           }
           unless ($no_ets) {
     &Authen::Krb5::init_ets();      &Authen::Krb5::init_ets();
  }   }
   
Line 6527  sub make_new_child { Line 8020  sub make_new_child {
  #  If the remote is attempting a local init... give that a try:   #  If the remote is attempting a local init... give that a try:
  #   #
  (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);   (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   # If the connection type is ssl, but I didn't get my
  # certificate files yet, then I'll drop  back to    # certificate files yet, then I'll drop  back to 
  # insecure (if allowed).   # 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($inittype eq "ssl") {   if($inittype eq "ssl") {
     my ($ca, $cert) = lonssl::CertificateFile;      my ($ca, $cert) = lonssl::CertificateFile;
     my $kfile       = lonssl::KeyFile;      my $kfile       = lonssl::KeyFile;
Line 6570  sub make_new_child { Line 8088  sub make_new_child {
  close $client;   close $client;
     }      }
  } elsif ($inittype eq "ssl") {   } elsif ($inittype eq "ssl") {
     my $key = SSLConnection($client);      my $key = SSLConnection($client,$clientname);
     if ($key) {      if ($key) {
  $clientok = 1;   $clientok = 1;
  my $cipherkey = pack("H32", $key);   my $cipherkey = pack("H32", $key);
Line 6597  sub make_new_child { Line 8115  sub make_new_child {
   ."Attempted insecure connection disallowed </font>");    ."Attempted insecure connection disallowed </font>");
  close $client;   close $client;
  $clientok = 0;   $clientok = 0;
   
     }      }
  }   }
     } else {      } else {
Line 6606  sub make_new_child { Line 8123  sub make_new_child {
  ."$clientip failed to initialize: >$remotereq< </font>");   ."$clientip failed to initialize: >$remotereq< </font>");
  &status('No init '.$clientip);   &status('No init '.$clientip);
     }      }
       
  } else {   } else {
     &logthis(      &logthis(
      "<font color='blue'>WARNING: Unknown client $clientip</font>");       "<font color='blue'>WARNING: Unknown client $clientip</font>");
Line 6624  sub make_new_child { Line 8140  sub make_new_child {
 # ------------------------------------------------------------ Process requests  # ------------------------------------------------------------ Process requests
     my $keep_going = 1;      my $keep_going = 1;
     my $user_input;      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) && $keep_going) {      while(($user_input = get_request) && $keep_going) {
  alarm(120);   alarm(120);
  Debug("Main: Got $user_input\n");   Debug("Main: Got $user_input\n");
  $keep_going = &process_request($user_input);   $keep_going = &process_request($user_input);
  alarm(0);   alarm(0);
  &status('Listening to '.$clientname." ($keymode)");      &status('Listening to '.$clientname." ($keymode)");
     }      }
   
 # --------------------------------------------- client unknown or fishy, refuse  # --------------------------------------------- client unknown or fishy, refuse
Line 6642  sub make_new_child { Line 8156  sub make_new_child {
     &logthis("<font color='blue'>WARNING: "      &logthis("<font color='blue'>WARNING: "
      ."Rejected client $clientip, closing connection</font>");       ."Rejected client $clientip, closing connection</font>");
  }   }
     }                  }
           
 # =============================================================================  # =============================================================================
           
     &logthis("<font color='red'>CRITICAL: "      &logthis("<font color='red'>CRITICAL: "
      ."Disconnect from $clientip ($clientname)</font>");           ."Disconnect from $clientip ($clientname)</font>");    
       
       
     # this exit is VERY important, otherwise the child will become      # this exit is VERY important, otherwise the child will become
     # a producer of more and more children, forking yourself into      # a producer of more and more children, forking yourself into
     # process death.      # process death.
     exit;      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.  #   Determine if a user is an author for the indicated domain.
 #  #
Line 6764  sub password_filename { Line 8347  sub password_filename {
 #    domain    - domain of the user.  #    domain    - domain of the user.
 #    name      - User's name.  #    name      - User's name.
 #    contents  - New contents of the file.  #    contents  - New contents of the file.
   #    saveold   - (optional). If true save old file in a passwd.bak file.
 # Returns:  # Returns:
 #   0    - Failed.  #   0    - Failed.
 #   1    - Success.  #   1    - Success.
 #  #
 sub rewrite_password_file {  sub rewrite_password_file {
     my ($domain, $user, $contents) = @_;      my ($domain, $user, $contents, $saveold) = @_;
   
     my $file = &password_filename($domain, $user);      my $file = &password_filename($domain, $user);
     if (defined $file) {      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");   my $pf = IO::File->new(">$file");
  if($pf) {   if($pf) {
     print $pf "$contents\n";      print $pf "$contents\n";
Line 6859  sub validate_user { Line 8452  sub validate_user {
             } elsif ((($domdefaults{'auth_def'} eq 'krb4') ||               } elsif ((($domdefaults{'auth_def'} eq 'krb4') || 
                       ($domdefaults{'auth_def'} eq 'krb5')) &&                        ($domdefaults{'auth_def'} eq 'krb5')) &&
                      ($domdefaults{'auth_arg_def'} ne '')) {                       ($domdefaults{'auth_arg_def'} ne '')) {
                 $howpwd = $domdefaults{'auth_def'};                  #
                 $contentpwd = $domdefaults{'auth_arg_def'};                   # Don't attempt authentication for username and password supplied
                   # for user without an account if uername contains @ to avoid
                   # call to &Authen::Krb5::parse_name() which will result in con_lost
                   #
                   unless ($user =~ /\@/) {
                       $howpwd = $domdefaults{'auth_def'};
                       $contentpwd = $domdefaults{'auth_arg_def'};
                   }
             }              }
         }          }
     }       }
     if ($howpwd ne 'nouser') {      if ($howpwd ne 'nouser') {
  if($howpwd eq "internal") { # Encrypted is in local password file.   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.   elsif ($howpwd eq "unix") { # User is a normal unix user.
     $contentpwd = (getpwnam($user))[1];      $contentpwd = (getpwnam($user))[1];
Line 6934  sub validate_user { Line 8552  sub validate_user {
     return $validated;      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 {  sub krb4_authen {
     my ($password,$null,$user,$contentpwd) = @_;      my ($password,$null,$user,$contentpwd) = @_;
     my $validated = 0;      my $validated = 0;
Line 7249  sub change_unix_password { Line 8911  sub change_unix_password {
   
   
 sub make_passwd_file {  sub make_passwd_file {
     my ($uname,$udom,$umode,$npass,$passfilename)=@_;      my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
     my $result="ok";      my $result="ok";
     if ($umode eq 'krb4' or $umode eq 'krb5') {      if ($umode eq 'krb4' or $umode eq 'krb5') {
  {   {
     my $pf = IO::File->new(">$passfilename");      my $pf = IO::File->new(">$passfilename");
     if ($pf) {      if ($pf) {
  print $pf "$umode:$npass\n";   print $pf "$umode:$npass\n";
                   &update_passwd_history($uname,$udom,$umode,$action);
     } else {      } else {
  $result = "pass_file_failed_error";   $result = "pass_file_failed_error";
     }      }
  }   }
     } elsif ($umode eq 'internal') {      } 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");      &Debug("Creating internal auth");
     my $pf = IO::File->new(">$passfilename");      my $pf = IO::File->new(">$passfilename");
     if($pf) {      if($pf) {
  print $pf "internal:$ncpass\n";    print $pf "internal:$ncpass\n";
                   &update_passwd_history($uname,$udom,$umode,$action); 
     } else {      } else {
  $result = "pass_file_failed_error";   $result = "pass_file_failed_error";
     }      }
Line 7278  sub make_passwd_file { Line 8940  sub make_passwd_file {
     my $pf = IO::File->new(">$passfilename");      my $pf = IO::File->new(">$passfilename");
     if($pf) {      if($pf) {
  print $pf "localauth:$npass\n";   print $pf "localauth:$npass\n";
                   &update_passwd_history($uname,$udom,$umode,$action);
     } else {      } else {
  $result = "pass_file_failed_error";   $result = "pass_file_failed_error";
     }      }
Line 7294  sub make_passwd_file { Line 8957  sub make_passwd_file {
  $result = "pass_file_failed_error";   $result = "pass_file_failed_error";
     }      }
  }   }
       } elsif ($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 {      } else {
  $result="auth_mode_error";   $result="auth_mode_error";
     }      }
Line 7318  sub sethost { Line 8989  sub sethost {
  eq &Apache::lonnet::get_host_ip($hostid)) {   eq &Apache::lonnet::get_host_ip($hostid)) {
  $currenthostid  =$hostid;   $currenthostid  =$hostid;
  $currentdomainid=&Apache::lonnet::host_domain($hostid);   $currentdomainid=&Apache::lonnet::host_domain($hostid);
           &set_client_info();
 # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");  # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
     } else {      } else {
  &logthis("Requested host id $hostid not an alias of ".   &logthis("Requested host id $hostid not an alias of ".
Line 7340  sub get_usersession_config { Line 9012  sub get_usersession_config {
         return $usersessionconf;          return $usersessionconf;
     } else {      } else {
         my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);          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;      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 {  sub distro_and_arch {
     return $dist.':'.$arch;      return $dist.':'.$arch;
Line 7532  Allow for a password to be set. Line 9275  Allow for a password to be set.
   
 Make a user.  Make a user.
   
 =item passwd  =item changeuserauth
   
 Allow for authentication mechanism and password to be changed.  Allow for authentication mechanism and password to be changed.
   
Line 7621  for each student, defined perhaps by the Line 9364  for each student, defined perhaps by the
 Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers  Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers
 for each student, defined perhaps by the institutional Registrar.)  for each student, defined perhaps by the institutional Registrar.)
   
   =item iddel
   
   Deletes one or more ids in a domain's id database.
   
 =item tmpput  =item tmpput
   
 Accept and store information in temporary space.  Accept and store information in temporary space.
Line 7670  IO::File Line 9417  IO::File
 Apache::File  Apache::File
 POSIX  POSIX
 Crypt::IDEA  Crypt::IDEA
 LWP::UserAgent()  
 GDBM_File  GDBM_File
 Authen::Krb4  Authen::Krb4
 Authen::Krb5  Authen::Krb5
   
 =head1 COREQUISITES  =head1 COREQUISITES
   
   none
   
 =head1 OSNAMES  =head1 OSNAMES
   
 linux  linux
Line 7750  is closed and the child exits. Line 9498  is closed and the child exits.
 =item Red CRITICAL Can't get key file <error>          =item Red CRITICAL Can't get key file <error>        
   
 SSL key negotiation is being attempted but the call to  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  configuration file is not correctly defining or protecting
 the directories/files lonCertificateDirectory or  the directories/files lonCertificateDirectory or
 lonnetPrivateKey  lonnetPrivateKey
Line 7764  or the CA's certificate in the call to l Line 9512  or the CA's certificate in the call to l
 <error> is the textual reason this failed.  Usual reasons:  <error> is the textual reason this failed.  Usual reasons:
   
 =over 2  =over 2
          
 =item Apache config file for loncapa  incorrect:  =item Apache config file for loncapa  incorrect:
    
 one of the variables   one of the variables 
 lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate  lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
 undefined or incorrect  undefined or incorrect
Line 7885  Could not rewrite the Line 9633  Could not rewrite the
 internal password file for a user  internal password file for a user
   
 =item Result of password change for <user> : <result>  =item Result of password change for <user> : <result>
                                                                        
 A unix password change for <user> was attempted   A unix password change for <user> was attempted 
 and the pipe returned <result>    and the pipe returned <result>  
   
Line 7914  lond has been asked to exit by its clien Line 9662  lond has been asked to exit by its clien
 client systemand <input> is the full exit command sent to the server.  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>].  =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  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,  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  <hostname> the host lond is working for, and <message> the reason the child died
Line 7998  file when sent it's USR1 signal.  That p Line 9746  file when sent it's USR1 signal.  That p
 assumed to be hung in some un-fixable way.  assumed to be hung in some un-fixable way.
   
 =item Finished checking children                     =item Finished checking children                   
    
 Master processs's USR1 processing is cojmplete.  Master processs's USR1 processing is cojmplete.
   
 =item (Red) CRITICAL: ------- Starting ------              =item (Red) CRITICAL: ------- Starting ------            
Line 8012  Started a new child process for <client> Line 9760  Started a new child process for <client>
 connected to the child.  This was as a result of a TCP/IP connection from a 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  =item Unable to determine who caller was, getpeername returned nothing
                                                     
 In child process initialization.  either getpeername returned undef or  In child process initialization.  either getpeername returned undef or
 a zero sized object was returned.  Processing continues, but in my opinion,  a zero sized object was returned.  Processing continues, but in my opinion,
 this should be cause for the child to exit.  this should be cause for the child to exit.
Line 8023  In child process initialization.  The pe Line 9771  In child process initialization.  The pe
 The client address is stored as "Unavailable" and processing continues.  The client address is stored as "Unavailable" and processing continues.
   
 =item (Yellow) INFO: Connection <ip> <name> connection type = <type>  =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
                                                     
 In child initialization.  A good connectionw as received from <ip>.  In child initialization.  A good connectionw as received from <ip>.
   
 =over 2  =over 2
Line 8073  The client (<client> is the peer's name Line 9821  The client (<client> is the peer's name
 negotiated an SSL connection with this child process.  negotiated an SSL connection with this child process.
   
 =item (Green) Successful insecure authentication with <client>  =item (Green) Successful insecure authentication with <client>
                                                      
   
 The client has successfully negotiated an  insecure connection withthe child process.  The client has successfully negotiated an  insecure connection withthe child process.
   

Removed from v.1.489.2.9  
changed lines
  Added in v.1.576


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