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Diff for /loncom/lond between versions 1.511 and 1.540

version 1.511, 2014/06/29 03:22:43 version 1.540, 2017/06/06 20:03:24
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;             # Client allowed to host domain's users.
                                   # (version constraints ignored), not set
                                   # if this host and client share "internet domain". 
   my %clientprohibited;           # Actions prohibited on client;
    
 my $server;  my $server;
   
 my $keymode;  my $keymode;
Line 93  my %managers;   # Ip -> manager names Line 105  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 $dist;  my $dist;
   
 #  #
Line 142  my @installerrors = ("ok", Line 157  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")
   # 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},
                  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},
                  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},
                  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
                  eget => {remote => 1, domroles => 1, enroll => 1}, #not used currently
                  egetdom => {remote => 1, domroles => 1, enroll => 1, },
                  ekey => {}, #not used currently
                  exit => {anywhere => 1},
                  fetchuserfile => {remote => 1, enroll => 1},
                  get => {remote => 1, domroles => 1, enroll => 1},
                  getdom => {anywhere => 1},
                  home => {anywhere => 1},
                  iddel => {remote => 1, enroll => 1},
                  idget => {remote => 1, enroll => 1},
                  idput => {remote => 1, domroles => 1, enroll => 1},
                  inc => {remote => 1, enroll => 1},
                  init => {anywhere => 1},
                  inst_usertypes => {remote => 1, domroles => 1, enroll => 1},
                  instemailrules => {remote => 1, domroles => 1},
                  instidrulecheck => {remote => 1, domroles => 1,},
                  instidrules => {remote => 1, domroles => 1,},
                  instrulecheck => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
                  instselfcreatecheck => {institutiononly => 1},
                  instuserrules => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
                  keys => {remote => 1,},
                  load => {anywhere => 1},
                  log => {anywhere => 1},
                  ls => {remote => 1, enroll => 1, content => 1,},
                  ls2 => {remote => 1, enroll => 1, content => 1,},
                  ls3 => {remote => 1, enroll => 1, content => 1,},
                  makeuser => {remote => 1, enroll => 1, domroles => 1,},
                  mkdiruserfile => {remote => 1, enroll => 1,},
                  newput => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1,},
                  passwd => {remote => 1},
                  ping => {anywhere => 1},
                  pong => {anywhere => 1},
                  pushfile => {manageronly => 1},
                  put => {remote => 1, enroll => 1, domroles => 1, msg => 1, content => 1, shared => 1},
                  putdom => {remote => 1, domroles => 1,},
                  putstore => {remote => 1, enroll => 1},
                  queryreply => {anywhere => 1},
                  querysend => {anywhere => 1},
                  querysend_activitylog => {remote => 1},
                  querysend_allusers => {remote => 1, domroles => 1},
                  querysend_courselog => {remote => 1},
                  querysend_fetchenrollment => {remote => 1},
                  querysend_getinstuser => {remote => 1},
                  querysend_getmultinstusers => {remote => 1},
                  querysend_instdirsearch => {remote => 1, domroles => 1, coaurem => 1},
                  querysend_institutionalphotos => {remote => 1},
                  querysend_portfolio_metadata => {remote => 1, content => 1},
                  querysend_userlog => {remote => 1, domroles => 1},
                  querysend_usersearch => {remote => 1, enroll => 1, coaurem => 1},
                  quit => {anywhere => 1},
                  readlonnetglobal => {institutiononly => 1},
                  reinit => {manageronly => 1}, #not used currently
                  removeuserfile => {remote => 1, enroll => 1},
                  renameuserfile => {remote => 1,},
                  restore => {remote => 1, enroll => 1, reqcrs => 1,},
                  rolesdel => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
                  rolesput => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
                  servercerts => {institutiononly => 1},
                  serverdistarch => {anywhere => 1},
                  serverhomeID => {anywhere => 1},
                  serverloncaparev => {anywhere => 1},
                  servertimezone => {remote => 1, enroll => 1},
                  setannounce => {remote => 1, domroles => 1},
                  sethost => {anywhere => 1},
                  store => {remote => 1, enroll => 1, reqcrs => 1,},
                  studentphoto => {remote => 1, enroll => 1},
                  sub => {content => 1,},
                  tmpdel => {anywhere => 1},
                  tmpget => {anywhere => 1},
                  tmpput => {anywhere => 1},
                  tokenauthuserfile => {anywhere => 1},
                  unsub => {content => 1,},
                  update => {shared => 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 297  sub InsecureConnection { Line 463  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 664  sub PushFile { Line 845  sub PushFile {
                 $clientprotocol = 'http' if ($clientprotocol ne 'https');                  $clientprotocol = 'http' if ($clientprotocol ne 'https');
                 my $url = '/adm/'.$filename;                  my $url = '/adm/'.$filename;
                 $url =~ s{_}{/};                  $url =~ s{_}{/};
                 my $ua=new LWP::UserAgent;  
                 $ua->timeout(60);  
                 my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");                  my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
                 my $response=$ua->request($request);                  my $response = LONCAPA::LWPReq::makerequest($clientname,$request,'',\%perlvar,60,0);
                 if ($response->is_error()) {                  if ($response->is_error()) {
                     &logthis('<font color="red"> Pushfile: unable to install '                      &logthis('<font color="red"> Pushfile: unable to install '
                             .$tablefile." - error attempting to pull data. </font>");                              .$tablefile." - error attempting to pull data. </font>");
Line 1422  sub du2_handler { Line 1601  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 1443  sub ls_handler { Line 1638  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 1468  sub ls_handler { Line 1672  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 1492  sub ls_handler { Line 1701  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 1512  sub ls2_handler { Line 1737  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 1538  sub ls2_handler { Line 1772  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 1554  sub ls2_handler { Line 1793  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 1593  sub ls3_handler { Line 1851  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 1621  sub ls3_handler { Line 1869  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;
     if (-e $ulsdir) {      if (-e $ulsdir) {
         if(-d $ulsdir) {          if(-d $ulsdir) {
               unless (($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",$userinput);
                   return 1;
               }
             if (opendir(LSDIR,$ulsdir)) {              if (opendir(LSDIR,$ulsdir)) {
                 while ($ulsfn=readdir(LSDIR)) {                  while ($ulsfn=readdir(LSDIR)) {
                     undef($obs);                      undef($obs);
Line 1651  sub ls3_handler { Line 1915  sub ls3_handler {
                 closedir(LSDIR);                  closedir(LSDIR);
             }              }
         } else {          } else {
               unless (($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 1674  sub read_lonnet_global { Line 1945  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 1794  sub server_distarch_handler { Line 2067  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 $result;
       my $result = &LONCAPA::Lond::server_certs(\%perlvar);
       &Reply($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 1926  sub authenticate_handler { Line 2209  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') {
Line 2013  sub change_password_handler { Line 2296  sub change_password_handler {
  my ($howpwd,$contentpwd)=split(/:/,$realpasswd);   my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
  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 $ncpass=crypt($npass,$salt);  
     if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {      if(&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 $uname passwd "               
Line 2030  sub change_password_handler { Line 2312  sub change_password_handler {
     }      }
  } elsif ($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 2052  sub change_password_handler { Line 2337  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 2095  sub add_user_handler { Line 2412  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 2164  sub change_authentication_handler { Line 2482  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 2190  sub change_authentication_handler { Line 2510  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;
   }
   
 #  #
 #   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 2271  sub update_resource_handler { Line 2602  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  # FIXME: we should probably clean up here instead of just whine
     unlink($transname);      unlink($transname);
Line 2288  sub update_resource_handler { Line 2613  sub update_resource_handler {
     &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 2368  sub fetch_user_file_handler { Line 2687  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 2441  sub remove_user_file_handler { Line 2760  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 2808  sub newput_user_profile_entry { Line 3136  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 3059  sub get_profile_entry { Line 3391  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 3322  sub dump_with_regexp { Line 3655  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 3330  sub dump_with_regexp { Line 3666  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 3359  sub store_handler { Line 3717  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 3602  sub retrieve_chat_handler { Line 3964  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.  #     $tail      - Remainder of the command after the keyword.
 #                  For this function, this consists of a query and  #                  For this function, this consists of a query and
 #                  3 arguments that are self-documentingly labelled  #                  3 arguments that are self-documentingly labelled
Line 3616  sub retrieve_chat_handler { Line 3978  sub retrieve_chat_handler {
 sub send_query_handler {  sub send_query_handler {
     my ($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 4344  sub put_domain_handler { Line 4736  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.
Line 4367  sub get_domain_handler { Line 4875  sub get_domain_handler {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
   
   
     my $userinput = "$client:$tail";      my $userinput = "$cmd:$tail";
   
       my ($udom,$namespace,$what)=split(/:/,$tail,3);
       chomp($what);
       if ($namespace =~ /^enc/) {
           &Failure( $client, "refused\n", $userinput);
       } else {
           my @queries=split(/\&/,$what);
           my $qresult='';
           my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
           if ($hashref) {
               for (my $i=0;$i<=$#queries;$i++) {
                   $qresult.="$hashref->{$queries[$i]}&";
               }
               if (&untie_domain_hash($hashref)) {
                   $qresult=~s/\&$//;
                   &Reply($client, \$qresult, $userinput);
               } else {
                   &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
                             "while attempting getdom\n",$userinput);
               }
           } else {
               &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                        "while attempting getdom\n",$userinput);
           }
       }
   
       return 1;
   }
   &register_handler("getdom", \&get_domain_handler, 0, 1, 0);
   
   sub encrypted_get_domain_handler {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput = "$cmd:$tail";
   
     my ($udom,$namespace,$what)=split(/:/,$tail,3);      my ($udom,$namespace,$what)=split(/:/,$tail,3);
     chomp($what);      chomp($what);
Line 4380  sub get_domain_handler { Line 4922  sub get_domain_handler {
         }          }
         if (&untie_domain_hash($hashref)) {          if (&untie_domain_hash($hashref)) {
             $qresult=~s/\&$//;              $qresult=~s/\&$//;
             &Reply($client, \$qresult, $userinput);              if ($cipher) {
                   my $cmdlength=length($qresult);
                   $qresult.="         ";
                   my $encqresult='';
                   for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
                       $encqresult.= unpack("H16",
                                            $cipher->encrypt(substr($qresult,
                                                                    $encidx,
                                                                    8)));
                   }
                   &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
               } else {
                   &Failure( $client, "error:no_key\n", $userinput);
               }
         } else {          } else {
             &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".              &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
                       "while attempting getdom\n",$userinput);                        "while attempting egetdom\n",$userinput);
         }          }
     } else {      } else {
         &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".          &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                  "while attempting getdom\n",$userinput);                   "while attempting egetdom\n",$userinput);
     }      }
   
     return 1;      return 1;
 }  }
 &register_handler("getdom", \&get_domain_handler, 0, 1, 0);  &register_handler("egetdom", \&encrypted_get_domain_handler, 1, 1, 0);
   
 #  #
 #  Puts an id to a domains id database.   #  Puts an id to a domains id database. 
Line 5249  sub create_auto_enroll_password_handler Line 5803  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.  #    $client   - Socket open on the client.
Line 5269  sub retrieve_auto_file_handler { Line 5868  sub retrieve_auto_file_handler {
     my ($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 5301  sub crsreq_checks_handler { Line 5905  sub crsreq_checks_handler {
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
     my $dom = $tail;      my $dom = $tail;
     my $result;      my $result;
     my @reqtypes = ('official','unofficial','community','textbook');      my @reqtypes = ('official','unofficial','community','textbook','placement');
     eval {      eval {
         local($SIG{__DIE__})='DEFAULT';          local($SIG{__DIE__})='DEFAULT';
         my %validations;          my %validations;
Line 5377  sub crsreq_update_handler { Line 5981  sub crsreq_update_handler {
                                                 $title,$code,$accessstart,$accessend,                                                  $title,$code,$accessstart,$accessend,
                                                 $incoming,\%rtnhash);                                                  $incoming,\%rtnhash);
         if ($outcome eq 'ok') {          if ($outcome eq 'ok') {
             my @posskeys = qw(createdweb createdmsg queuedweb queuedmsg formitems reviewweb);              my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
             foreach my $key (keys(%rtnhash)) {              foreach my $key (keys(%rtnhash)) {
                 if (grep(/^\Q$key\E/,@posskeys)) {                  if (grep(/^\Q$key\E/,@posskeys)) {
                     $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';                      $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
Line 5906  sub get_request { Line 6510  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 5991  sub process_request { Line 6596  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 $tail");
Line 6001  sub process_request { Line 6662  sub process_request {
     Failure($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 6259  sub UpdateHosts { Line 6919  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 6268  sub UpdateHosts { Line 6929  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) eq 'ok') {
           logthis('<font color="blue"> Reloaded SSL connection rules </font>');
       } else {
           logthis('<font color="yellow"> Failed to reload SSL connection rules </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 6511  if ($arch eq 'unknown') { Line 7219  if ($arch eq 'unknown') {
     chomp($arch);      chomp($arch);
 }  }
   
   unless (lonssl::Read_Connect_Config(\%secureconf,\%perlvar) 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 6596  sub make_new_child { Line 7308  sub make_new_child {
         &Authen::Krb5::init_context();          &Authen::Krb5::init_context();
   
         my $no_ets;          my $no_ets;
         if ($dist =~ /^(?:centos|rhes)(\d+)$/) {          if ($dist =~ /^(?:centos|rhes|scientific)(\d+)$/) {
             if ($1 >= 7) {              if ($1 >= 7) {
                 $no_ets = 1;                  $no_ets = 1;
             }              }
Line 6604  sub make_new_child { Line 7316  sub make_new_child {
             if (($1 eq '9.3') || ($1 >= 12.2)) {              if (($1 eq '9.3') || ($1 >= 12.2)) {
                 $no_ets = 1;                   $no_ets = 1; 
             }              }
           } elsif ($dist =~ /^sles(\d+)$/) {
               if ($1 > 11) {
                   $no_ets = 1;
               }
         } elsif ($dist =~ /^fedora(\d+)$/) {          } elsif ($dist =~ /^fedora(\d+)$/) {
             if ($1 < 7) {              if ($1 < 7) {
                 $no_ets = 1;                  $no_ets = 1;
Line 6637  sub make_new_child { Line 7353  sub make_new_child {
     $ConnectionType = "manager";      $ConnectionType = "manager";
     $clientname = $managers{$outsideip};      $clientname = $managers{$outsideip};
  }   }
  my $clientok;   my ($clientok,$clientinfoset);
   
  if ($clientrec || $ismanager) {   if ($clientrec || $ismanager) {
     &status("Waiting for init from $clientip $clientname");      &status("Waiting for init from $clientip $clientname");
Line 6654  sub make_new_child { Line 7370  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:
  #   #
         logthis("remotereq: $remotereq");  
  (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,
Line 6666  sub make_new_child { Line 7381  sub make_new_child {
  # 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 6699  sub make_new_child { Line 7439  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 6714  sub make_new_child { Line 7454  sub make_new_child {
     }      }
         
  } else {   } else {
                       $clientinfoset = &set_client_info();
     my $ok = InsecureConnection($client);      my $ok = InsecureConnection($client);
     if($ok) {      if($ok) {
  $clientok = 1;   $clientok = 1;
Line 6726  sub make_new_child { Line 7467  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 6735  sub make_new_child { Line 7475  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 6753  sub make_new_child { Line 7492  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);              unless ($clientinfoset) {
             my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);                  $clientinfoset = &set_client_info();
             $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);              }
               $clientremoteok = 0;
               unless ($clientsameinst) {
                   $clientremoteok = 1;
                   my $defdom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
                   %clientprohibited = &get_prohibited($defdom);
                   if ($clientintdom) {
                       my $remsessconf = &get_usersession_config($defdom,'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'}})) {
                                       $clientremoteok = 0;
                                   }
                               }
                               if (ref($remsessconf->{'remote'}->{'includedomain'}) eq 'ARRAY') {
                                   if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'includedomain'}})) {
                                       $clientremoteok = 1;
                                   } else {
                                       $clientremoteok = 0;
                                   }
                               }
                           }
                       }
                   }
               }
     while(($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");
Line 6771  sub make_new_child { Line 7535  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>");
  }   }
     }                  }
           
 # =============================================================================  # =============================================================================
           
Line 6785  sub make_new_child { Line 7549  sub make_new_child {
     exit;      exit;
           
 }  }
   
   #
   #  Used to determine if a particular client is from the same domain
   #  as the current server, or from the same internet 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.
   #
   #  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{'lonDefDom'} 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;
           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 6893  sub password_filename { Line 7711  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 6992  sub validate_user { Line 7820  sub validate_user {
                 $contentpwd = $domdefaults{'auth_arg_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 7063  sub validate_user { Line 7909  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 7378  sub change_unix_password { Line 8268  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 7407  sub make_passwd_file { Line 8297  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 7469  sub get_usersession_config { Line 8360  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;      return;
 }  }
   
   sub get_usersearch_config {
       my ($dom,$name) = @_;
       my ($usersearchconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
       if (defined($cached)) {
           return $usersearchconf;
       } else {
           my %domconfig = &Apache::lonnet::get_dom('configuration',['directorysrch'],$dom);
           &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'directorysrch'},600);
           return $domconfig{'directorysrch'};
       }
       return;
   }
   
   sub get_prohibited {
       my ($dom) = @_;
       my $name = 'trust';
       my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
       unless (defined($cached)) {
           my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$dom);
           &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'trust'},3600);
           $trustconfig = $domconfig{'trust'};
       }
       my %prohibited;
       if (ref($trustconfig)) {
           foreach my $prefix (keys(%{$trustconfig})) {
               if (ref($trustconfig->{$prefix}) eq 'HASH') {
                   my $reject;
                   if (ref($trustconfig->{$prefix}->{'exc'}) eq 'ARRAY') {
                       if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'exc'}})) {
                           $reject = 1;
                       }
                   }
                   if (ref($trustconfig->{$prefix}->{'inc'}) eq 'ARRAY') {
                       if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'inc'}})) {
                           $reject = 0;
                       } else {
                           $reject = 1;
                       }
                   }
                   if ($reject) {
                       $prohibited{$prefix} = 1;
                   }
               }
           }
       }
       return %prohibited;
   }
   
 sub distro_and_arch {  sub distro_and_arch {
     return $dist.':'.$arch;      return $dist.':'.$arch;
Line 7663  Allow for a password to be set. Line 8597  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 7752  for each student, defined perhaps by the Line 8686  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 7801  IO::File Line 8739  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
Removed from v.1.511  
changed lines
  Added in v.1.540

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