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Diff for /loncom/lond between versions 1.199 and 1.200

version 1.199, 2004/06/18 23:57:17 version 1.200, 2004/06/21 13:25:53
Line 48  use localauth; Line 48  use localauth;
 use localenroll;  use localenroll;
 use File::Copy;  use File::Copy;
 use LONCAPA::ConfigFileEdit;  use LONCAPA::ConfigFileEdit;
   use LONCAPA::lonlocal;
   use LONCAPA::lonssl;
   
 my $DEBUG = 0;       # Non zero to enable debug log entries.  my $DEBUG = 11;       # Non zero to enable debug log entries.
   
 my $status='';  my $status='';
 my $lastlog='';  my $lastlog='';
Line 60  my $currenthostid; Line 62  my $currenthostid;
 my $currentdomainid;  my $currentdomainid;
   
 my $client;  my $client;
 my $clientip;  my $clientip; # IP address of client.
 my $clientname;  my $clientdns; # DNS name of client.
   my $clientname; # LonCAPA name of client.
   
 my $server;  my $server;
 my $thisserver;  my $thisserver; # DNS of us.
   
   my $keymode;
   
 #   # 
 #   Connection type is:  #   Connection type is:
Line 75  my $thisserver; Line 80  my $thisserver;
   
 my $ConnectionType;  my $ConnectionType;
   
 my %hostid;  my %hostid; # ID's for hosts in cluster by ip.
 my %hostdom;  my %hostdom; # LonCAPA domain for hosts in cluster.
 my %hostip;  my %hostip; # IPs for hosts in cluster.
   my %hostdns; # ID's of hosts looked up by DNS name.
   
 my %managers; # Ip -> manager names  my %managers; # Ip -> manager names
   
Line 121  my @adderrors    = ("ok", Line 127  my @adderrors    = ("ok",
     "lcuseradd Password mismatch");      "lcuseradd Password mismatch");
   
   
   #------------------------------------------------------------------------
   #
   #   LocalConnection
   #     Completes the formation of a locally authenticated connection.
   #     This function will ensure that the 'remote' client is really the
   #     local host.  If not, the connection is closed, and the function fails.
   #     If so, initcmd is parsed for the name of a file containing the
   #     IDEA session key.  The fie is opened, read, deleted and the session
   #     key returned to the caller.
   #
   # Parameters:
   #   $Socket      - Socket open on client.
   #   $initcmd     - The full text of the init command.
   #
   # Implicit inputs:
   #    $clientdns  - The DNS name of the remote client.
   #    $thisserver - Our DNS name.
   #
   # Returns:
   #     IDEA session key on success.
   #     undef on failure.
   #
   sub LocalConnection {
       my ($Socket, $initcmd) = @_;
       Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");
       if($clientdns ne $thisserver) {
    &logthis('<font color="red"> LocalConnection rejecting non local: '
    ."$clientdns ne $thisserver </font>");
    close $Socket;
    return undef;
       } 
       else {
    chomp($initcmd); # Get rid of \n in filename.
    my ($init, $type, $name) = split(/:/, $initcmd);
    Debug(" Init command: $init $type $name ");
   
    # Require that $init = init, and $type = local:  Otherwise
    # the caller is insane:
   
    if(($init ne "init") && ($type ne "local")) {
       &logthis('<font color = "red"> LocalConnection: caller is insane! '
        ."init = $init, and type = $type </font>");
       close($Socket);;
       return undef;
   
    }
    #  Now get the key filename:
   
    my $IDEAKey = lonlocal::ReadKeyFile($name);
    return $IDEAKey;
       }
   }
   #------------------------------------------------------------------------------
   #
   #  SSLConnection
   #   Completes the formation of an ssh authenticated connection. The
   #   socket is promoted to an ssl socket.  If this promotion and the associated
   #   certificate exchange are successful, the IDEA key is generated and sent
   #   to the remote peer via the SSL tunnel. The IDEA key is also returned to
   #   the caller after the SSL tunnel is torn down.
   #
   # Parameters:
   #   Name              Type             Purpose
   #   $Socket          IO::Socket::INET  Plaintext socket.
   #
   # Returns:
   #    IDEA key on success.
   #    undef on failure.
   #
   sub SSLConnection {
       my $Socket   = shift;
   
       Debug("SSLConnection: ");
       my $KeyFile         = lonssl::KeyFile();
       if(!$KeyFile) {
    my $err = lonssl::LastError();
    &logthis("<font color=\"red\"> CRITICAL"
    ."Can't get key file $err </font>");
    return undef;
       }
       my ($CACertificate,
    $Certificate) = lonssl::CertificateFile();
   
   
       # If any of the key, certificate or certificate authority 
       # certificate filenames are not defined, this can't work.
   
       if((!$Certificate) || (!$CACertificate)) {
    my $err = lonssl::LastError();
    &logthis("<font color=\"red\"> CRITICAL"
    ."Can't get certificates: $err </font>");
   
    return undef;
       }
       Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
   
       # Indicate to our peer that we can procede with
       # a transition to ssl authentication:
   
       print $Socket "ok:ssl\n";
   
       Debug("Approving promotion -> ssl");
       #  And do so:
   
       my $SSLSocket = lonssl::PromoteServerSocket($Socket,
    $CACertificate,
    $Certificate,
    $KeyFile);
       if(! ($SSLSocket) ) { # SSL socket promotion failed.
    my $err = lonssl::LastError();
    &logthis("<font color=\"red\"> CRITICAL "
    ."SSL Socket promotion failed: $err </font>");
    return undef;
       }
       Debug("SSL Promotion successful");
   
       # 
       #  The only thing we'll use the socket for is to send the IDEA key
       #  to the peer:
   
       my $Key = lonlocal::CreateCipherKey();
       print $SSLSocket "$Key\n";
   
       lonssl::Close($SSLSocket); 
   
       Debug("Key exchange complete: $Key");
   
       return $Key;
   }
   #
   #     InsecureConnection: 
   #        If insecure connections are allowd,
   #        exchange a challenge with the client to 'validate' the
   #        client (not really, but that's the protocol):
   #        We produce a challenge string that's sent to the client.
   #        The client must then echo the challenge verbatim to us.
   #
   #  Parameter:
   #      Socket      - Socket open on the client.
   #  Returns:
   #      1           - success.
   #      0           - failure (e.g.mismatch or insecure not allowed).
   #
   sub InsecureConnection {
       my $Socket  =  shift;
   
       #   Don't even start if insecure connections are not allowed.
   
       if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
    return 0;
       }
   
       #   Fabricate a challenge string and send it..
   
       my $challenge = "$$".time; # pid + time.
       print $Socket "$challenge\n";
       &status("Waiting for challenge reply");
   
       my $answer = <$Socket>;
       $answer    =~s/\W//g;
       if($challenge eq $answer) {
    return 1;
       } 
       else {
    logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
    &status("No challenge reqply");
    return 0;
       }
       
   
   }
   
 #  #
 #   GetCertificate: Given a transaction that requires a certificate,  #   GetCertificate: Given a transaction that requires a certificate,
 #   this function will extract the certificate from the transaction  #   this function will extract the certificate from the transaction
Line 351  sub InstallFile { Line 529  sub InstallFile {
   
     return 1;      return 1;
 }  }
   
   
 #  #
 #   ConfigFileFromSelector: converts a configuration file selector  #   ConfigFileFromSelector: converts a configuration file selector
 #                 (one of host or domain at this point) into a   #                 (one of host or domain at this point) into a 
Line 864  sub HUPSMAN {                      # sig Line 1044  sub HUPSMAN {                      # sig
 #  #
 #    Kill off hashes that describe the host table prior to re-reading it.  #    Kill off hashes that describe the host table prior to re-reading it.
 #    Hashes affected are:  #    Hashes affected are:
 #       %hostid, %hostdom %hostip  #       %hostid, %hostdom %hostip %hostdns.
 #  #
 sub KillHostHashes {  sub KillHostHashes {
     foreach my $key (keys %hostid) {      foreach my $key (keys %hostid) {
Line 876  sub KillHostHashes { Line 1056  sub KillHostHashes {
     foreach my $key (keys %hostip) {      foreach my $key (keys %hostip) {
  delete $hostip{$key};   delete $hostip{$key};
     }      }
       foreach my $key (keys %hostdns) {
    delete $hostdns{$key};
       }
 }  }
 #  #
 #   Read in the host table from file and distribute it into the various hashes:  #   Read in the host table from file and distribute it into the various hashes:
Line 886  sub KillHostHashes { Line 1069  sub KillHostHashes {
 sub ReadHostTable {  sub ReadHostTable {
   
     open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";      open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
           my $myloncapaname = $perlvar{'lonHostID'};
       Debug("My loncapa name is : $myloncapaname");
     while (my $configline=<CONFIG>) {      while (my $configline=<CONFIG>) {
  if (!($configline =~ /^\s*\#/)) {   if (!($configline =~ /^\s*\#/)) {
     my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);      my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
     chomp($ip); $ip=~s/\D+$//;      chomp($ip); $ip=~s/\D+$//;
     $hostid{$ip}=$id;      $hostid{$ip}=$id;         # LonCAPA name of host by IP.
     $hostdom{$id}=$domain;      $hostdom{$id}=$domain;    # LonCAPA domain name of host. 
     $hostip{$id}=$ip;      $hostip{$id}=$ip;      # IP address of host.
     if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }      $hostdns{$name} = $id;    # LonCAPA name of host by DNS.
   
       if ($id eq $perlvar{'lonHostID'}) { 
    Debug("Found me in the host table: $name");
    $thisserver=$name; 
       }
  }   }
     }      }
     close(CONFIG);      close(CONFIG);
Line 1030  sub logstatus { Line 1219  sub logstatus {
     my $docdir=$perlvar{'lonDocRoot'};      my $docdir=$perlvar{'lonDocRoot'};
     {      {
     my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");      my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
     print $fh $$."\t".$clientname."\t".$currenthostid."\t".$status."\t".$lastlog."\n";      print $fh $$."\t".$clientname."\t".$currenthostid."\t"
    .$status."\t".$lastlog."\t $keymode\n";
     $fh->close();      $fh->close();
     }      }
     &status("Finished londstatus.txt");      &status("Finished londstatus.txt");
     {      {
  my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");   my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
         print $fh $status."\n".$lastlog."\n".time;          print $fh $status."\n".$lastlog."\n".time."\n$keymode";
         $fh->close();          $fh->close();
     }      }
     &status("Finished logging");      &status("Finished logging");
Line 1265  sub make_new_child { Line 1455  sub make_new_child {
  &logthis("Unable to determine who caller was, getpeername returned nothing");   &logthis("Unable to determine who caller was, getpeername returned nothing");
     }      }
     if (defined($iaddr)) {      if (defined($iaddr)) {
  $clientip=inet_ntoa($iaddr);   $clientip  = inet_ntoa($iaddr);
    Debug("Connected with $clientip");
    $clientdns = gethostbyaddr($iaddr, AF_INET);
    Debug("Connected with $clientdns by name");
     } else {      } else {
  &logthis("Unable to determine clinetip");   &logthis("Unable to determine clientip");
  $clientip='Unavailable';   $clientip='Unavailable';
     }      }
           
Line 1301  sub make_new_child { Line 1494  sub make_new_child {
 # =============================================================================  # =============================================================================
             # do something with the connection              # do something with the connection
 # -----------------------------------------------------------------------------  # -----------------------------------------------------------------------------
  # see if we know client and check for spoof IP by challenge   # see if we know client and 'check' for spoof IP by ineffective challenge
   
  ReadManagerTable; # May also be a manager!!   ReadManagerTable; # May also be a manager!!
   
Line 1319  sub make_new_child { Line 1512  sub make_new_child {
     $clientname = $managers{$clientip};      $clientname = $managers{$clientip};
  }   }
  my $clientok;   my $clientok;
   
  if ($clientrec || $ismanager) {   if ($clientrec || $ismanager) {
     &status("Waiting for init from $clientip $clientname");      &status("Waiting for init from $clientip $clientname");
     &logthis('<font color="yellow">INFO: Connection, '.      &logthis('<font color="yellow">INFO: Connection, '.
Line 1326  sub make_new_child { Line 1520  sub make_new_child {
   " ($clientname) connection type = $ConnectionType </font>" );    " ($clientname) connection type = $ConnectionType </font>" );
     &status("Connecting $clientip  ($clientname))");       &status("Connecting $clientip  ($clientname))"); 
     my $remotereq=<$client>;      my $remotereq=<$client>;
     $remotereq=~s/[^\w:]//g;      chomp($remotereq);
       Debug("Got init: $remotereq");
       my $inikeyword = split(/:/, $remotereq);
     if ($remotereq =~ /^init/) {      if ($remotereq =~ /^init/) {
  &sethost("sethost:$perlvar{'lonHostID'}");   &sethost("sethost:$perlvar{'lonHostID'}");
  my $challenge="$$".time;   #
  print $client "$challenge\n";   #  If the remote is attempting a local init... give that a try:
  &status(   #
  "Waiting for challenge reply from $clientip ($clientname)");    my ($i, $inittype) = split(/:/, $remotereq);
  $remotereq=<$client>;  
  $remotereq=~s/\W//g;   # If the connection type is ssl, but I didn't get my
  if ($challenge eq $remotereq) {   # certificate files yet, then I'll drop  back to 
     $clientok=1;   # insecure (if allowed).
     print $client "ok\n";  
    if($inittype eq "ssl") {
       my ($ca, $cert) = lonssl::CertificateFile;
       my $kfile       = lonssl::KeyFile;
       if((!$ca)   || 
          (!$cert) || 
          (!$kfile)) {
    $inittype = ""; # This forces insecure attempt.
    &logthis("<font color=\"blue\"> Certificates not "
    ."installed -- trying insecure auth</font>");
       }
       else { # SSL certificates are in place so
       } # Leave the inittype alone.
    }
   
    if($inittype eq "local") {
       my $key = LocalConnection($client, $remotereq);
       if($key) {
    Debug("Got local key $key");
    $clientok     = 1;
    my $cipherkey = pack("H32", $key);
    $cipher       = new IDEA($cipherkey);
    print $client "ok:local\n";
    &logthis('<font color="green"'
    . "Successful local authentication </font>");
    $keymode = "local"
       } else {
    Debug("Failed to get local key");
    $clientok = 0;
    shutdown($client, 3);
    close $client;
       }
    } elsif ($inittype eq "ssl") {
       my $key = SSLConnection($client);
       if ($key) {
    $clientok = 1;
    my $cipherkey = pack("H32", $key);
    $cipher       = new IDEA($cipherkey);
    &logthis('<font color="green">'
    ."Successfull ssl authentication with $clientname </font>");
    $keymode = "ssl";
        
       } else {
    $clientok = 0;
    close $client;
       }
      
  } else {   } else {
     &logthis(      my $ok = InsecureConnection($client);
      "<font color='blue'>WARNING: $clientip did not reply challenge</font>");      if($ok) {
     &status('No challenge reply '.$clientip);   $clientok = 1;
    &logthis('<font color="green">'
    ."Successful insecure authentication with $clientname </font>");
    print $client "ok\n";
    $keymode = "insecure";
       } else {
    &logthis('<font color="yellow">'
     ."Attempted insecure connection disallowed </font>");
    close $client;
    $clientok = 0;
   
       }
  }   }
     } else {      } else {
  &logthis(   &logthis(
Line 1349  sub make_new_child { Line 1602  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 $clientip</font>");
     &status('Hung up on '.$clientip);      &status('Hung up on '.$clientip);
  }   }
    
  if ($clientok) {   if ($clientok) {
 # ---------------- New known client connecting, could mean machine online again  # ---------------- New known client connecting, could mean machine online again
           
Line 2778  sub make_new_child { Line 3033  sub make_new_child {
  Reply($client, "refused\n", $userinput);   Reply($client, "refused\n", $userinput);
             
     }      }
 # ----------------------------------------------------------portfolio directory list (portls)  
  } elsif ($userinput =~ /^portls/) {  
     if(isClient) {  
  my ($cmd,$uname,$udom)=split(/:/,$userinput);  
  my $udir=propath($udom,$uname).'/userfiles/portfolio';  
      my $dirLine='';  
      my $dirContents='';  
      if (opendir(LSDIR,$udir.'/')){  
      while ($dirLine = readdir(LSDIR)){  
      $dirContents = $dirContents.$dirLine.'<br />';  
      }  
      }else{  
      $dirContents = "No directory found\n";  
      }  
  print $client $dirContents."\n";  
     } else {  
  Reply($client, "refused\n", $userinput);  
     }  
   
 # -------------------------------------------------------------------------- ls  # -------------------------------------------------------------------------- ls
  } elsif ($userinput =~ /^ls/) {   } elsif ($userinput =~ /^ls/) {
     if(isClient) {      if(isClient) {
Line 2884  sub make_new_child { Line 3120  sub make_new_child {
  print $client "refused\n";   print $client "refused\n";
     }      }
 #------------------------------- is auto-enrollment enabled?  #------------------------------- is auto-enrollment enabled?
                 } elsif ($userinput =~/^autorun/) {                  } elsif ($userinput =~/^autorun:/) {
                     if (isClient) {                      if (isClient) {
                         my $outcome = &localenroll::run();                          my ($cmd,$cdom) = split(/:/,$userinput);
                           my $outcome = &localenroll::run($cdom);
                         print $client "$outcome\n";                          print $client "$outcome\n";
                     } else {                      } else {
                         print $client "0\n";                          print $client "0\n";
                     }                      }
 #------------------------------- get official sections (for auto-enrollment).  #------------------------------- get official sections (for auto-enrollment).
                 } elsif ($userinput =~/^autogetsections/) {                  } elsif ($userinput =~/^autogetsections:/) {
                     if (isClient) {                      if (isClient) {
                         my ($cmd,$coursecode)=split(/:/,$userinput);                          my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
                         my @secs = &localenroll::get_sections($coursecode);                          my @secs = &localenroll::get_sections($coursecode,$cdom);
                         my $seclist = &escape(join(':',@secs));                          my $seclist = &escape(join(':',@secs));
                         print $client "$seclist\n";                          print $client "$seclist\n";
                     } else {                      } else {
                         print $client "refused\n";                          print $client "refused\n";
                     }                      }
 #----------------------- validate owner of new course section (for auto-enrollment).  #----------------------- validate owner of new course section (for auto-enrollment).
                 } elsif ($userinput =~/^autonewcourse/) {                  } elsif ($userinput =~/^autonewcourse:/) {
                     if (isClient) {                      if (isClient) {
                         my ($cmd,$course_id,$owner)=split(/:/,$userinput);                          my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
                         my $outcome = &localenroll::new_course($course_id,$owner);                          my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
                         print $client "$outcome\n";                          print $client "$outcome\n";
                     } else {                      } else {
                         print $client "refused\n";                          print $client "refused\n";
                     }                      }
 #-------------- validate course section in schedule of classes (for auto-enrollment).  #-------------- validate course section in schedule of classes (for auto-enrollment).
                 } elsif ($userinput =~/^autovalidatecourse/) {                  } elsif ($userinput =~/^autovalidatecourse:/) {
                     if (isClient) {                      if (isClient) {
                         my ($cmd,$course_id)=split(/:/,$userinput);                          my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
                         my $outcome=&localenroll::validate_courseID($course_id);                          my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
                         print $client "$outcome\n";                          print $client "$outcome\n";
                     } else {                      } else {
                         print $client "refused\n";                          print $client "refused\n";
                     }                      }
 #--------------------------- create password for new user (for auto-enrollment).  #--------------------------- create password for new user (for auto-enrollment).
                 } elsif ($userinput =~/^autocreatepassword/) {                  } elsif ($userinput =~/^autocreatepassword:/) {
                     if (isClient) {                      if (isClient) {
                         my ($cmd,$authparam)=split(/:/,$userinput);                          my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
                         my ($create_passwd,$authchk) = @_;                          my ($create_passwd,$authchk);
                         ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam);                          ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
                         print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";                          print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
                     } else {                      } else {
                         print $client "refused\n";                          print $client "refused\n";
                     }                      }
 #---------------------------  read and remove temporary files (for auto-enrollment).  #---------------------------  read and remove temporary files (for auto-enrollment).
                 } elsif ($userinput =~/^autoretrieve/) {                  } elsif ($userinput =~/^autoretrieve:/) {
                     if (isClient) {                      if (isClient) {
                         my ($cmd,$filename) = split(/:/,$userinput);                          my ($cmd,$filename) = split(/:/,$userinput);
                         my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;                          my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
Line 2963  sub make_new_child { Line 3200  sub make_new_child {
  }   }
 # -------------------------------------------------------------------- complete  # -------------------------------------------------------------------- complete
  alarm(0);   alarm(0);
  &status('Listening to '.$clientname);   &status('Listening to '.$clientname." ($keymode)");
     }      }
 # --------------------------------------------- client unknown or fishy, refuse  # --------------------------------------------- client unknown or fishy, refuse
  } else {   } else {
Line 3322  sub sethost { Line 3559  sub sethost {
     my (undef,$hostid)=split(/:/,$remotereq);      my (undef,$hostid)=split(/:/,$remotereq);
     if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }      if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
     if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {      if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
  $currenthostid=$hostid;   $currenthostid  =$hostid;
  $currentdomainid=$hostdom{$hostid};   $currentdomainid=$hostdom{$hostid};
  &logthis("Setting hostid to $hostid, and domain to $currentdomainid");   &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
     } else {      } else {
Line 3362  sub userload { Line 3599  sub userload {
     return $userloadpercent;      return $userloadpercent;
 }  }
   
   
 # ----------------------------------- POD (plain old documentation, CPAN style)  # ----------------------------------- POD (plain old documentation, CPAN style)
   
 =head1 NAME  =head1 NAME
Removed from v.1.199  
changed lines
  Added in v.1.200

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