--- loncom/lond	2011/07/28 15:12:03	1.476
+++ loncom/lond	2017/03/20 03:21:08	1.489.2.27
@@ -2,7 +2,7 @@
 # The LearningOnline Network
 # lond "LON Daemon" Server (port "LOND" 5663)
 #
-# $Id: lond,v 1.476 2011/07/28 15:12:03 raeburn Exp $
+# $Id: lond,v 1.489.2.27 2017/03/20 03:21:08 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -34,6 +34,7 @@ use strict;
 use lib '/home/httpd/lib/perl/';
 use LONCAPA;
 use LONCAPA::Configuration;
+use LONCAPA::Lond;
 
 use IO::Socket;
 use IO::File;
@@ -54,13 +55,16 @@ use LONCAPA::lonssl;
 use Fcntl qw(:flock);
 use Apache::lonnet;
 use Mail::Send;
+use Crypt::Eksblowfish::Bcrypt;
+use Digest::SHA;
+use Encode;
 
 my $DEBUG = 0;		       # Non zero to enable debug log entries.
 
 my $status='';
 my $lastlog='';
 
-my $VERSION='$Revision: 1.476 $'; #' stupid emacs
+my $VERSION='$Revision: 1.489.2.27 $'; #' stupid emacs
 my $remoteVERSION;
 my $currenthostid="default";
 my $currentdomainid;
@@ -92,6 +96,8 @@ my %managers;			# Ip -> manager names
 
 my %perlvar;			# Will have the apache conf defined perl vars.
 
+my $dist;
+
 #
 #   The hash below is used for command dispatching, and is therefore keyed on the request keyword.
 #    Each element of the hash contains a reference to an array that contains:
@@ -127,32 +133,13 @@ my @passwderrors = ("ok",
 		   "pwchange_failure - lcpasswd Error filename is invalid");
 
 
-#  The array below are lcuseradd error strings.:
-
-my $lastadderror = 13;
-my @adderrors    = ("ok",
-		    "User ID mismatch, lcuseradd must run as user www",
-		    "lcuseradd Incorrect number of command line parameters must be 3",
-		    "lcuseradd Incorrect number of stdinput lines, must be 3",
-		    "lcuseradd Too many other simultaneous pwd changes in progress",
-		    "lcuseradd User does not exist",
-		    "lcuseradd Unable to make www member of users's group",
-		    "lcuseradd Unable to su to root",
-		    "lcuseradd Unable to set password",
-		    "lcuseradd Username has invalid characters",
-		    "lcuseradd Password has an invalid character",
-		    "lcuseradd User already exists",
-		    "lcuseradd Could not add user.",
-		    "lcuseradd Password mismatch");
-
-
 # This array are the errors from lcinstallfile:
 
 my @installerrors = ("ok",
 		     "Initial user id of client not that of www",
 		     "Usage error, not enough command line arguments",
-		     "Source file name does not exist",
-		     "Destination file name does not exist",
+		     "Source filename does not exist",
+		     "Destination filename does not exist",
 		     "Some file operation failed",
 		     "Invalid table filename."
 		     );
@@ -637,7 +624,7 @@ sub ConfigFileFromSelector {
 #     String to send to client ("ok" or "refused" if bad file).
 #
 sub PushFile {
-    my $request = shift;    
+    my $request = shift;
     my ($command, $filename, $contents) = split(":", $request, 3);
     &Debug("PushFile");
     
@@ -667,6 +654,44 @@ sub PushFile {
 
     if($filename eq "host") {
 	$contents = AdjustHostContents($contents);
+    } elsif ($filename eq 'dns_host' || $filename eq 'dns_domain') {
+        if ($contents eq '') {
+            &logthis('<font color="red"> Pushfile: unable to install '
+                    .$tablefile." - no data received from push. </font>");
+            return 'error: push had no data';
+        }
+        if (&Apache::lonnet::get_host_ip($clientname)) {
+            my $clienthost = &Apache::lonnet::hostname($clientname);
+            if ($managers{$clientip} eq $clientname) {
+                my $clientprotocol = $Apache::lonnet::protocol{$clientname};
+                $clientprotocol = 'http' if ($clientprotocol ne 'https');
+                my $url = '/adm/'.$filename;
+                $url =~ s{_}{/};
+                my $ua=new LWP::UserAgent;
+                $ua->timeout(60);
+                my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
+                my $response=$ua->request($request);
+                if ($response->is_error()) {
+                    &logthis('<font color="red"> Pushfile: unable to install '
+                            .$tablefile." - error attempting to pull data. </font>");
+                    return 'error: pull failed';
+                } else {
+                    my $result = $response->content;
+                    chomp($result);
+                    unless ($result eq $contents) {
+                        &logthis('<font color="red"> Pushfile: unable to install '
+                                .$tablefile." - pushed data and pulled data differ. </font>");
+                        my $pushleng = length($contents);
+                        my $pullleng = length($result);
+                        if ($pushleng != $pullleng) {
+                            return "error: $pushleng vs $pullleng bytes";
+                        } else {
+                            return "error: mismatch push and pull";
+                        }
+                    }
+                }
+            }
+        }
     }
 
     #  Install the new file:
@@ -1400,6 +1425,20 @@ sub du2_handler {
 #    selected directory the filename followed by the full output of
 #    the stat function is returned.  The returned info for each
 #    file are separated by ':'.  The stat fields are separated by &'s.
+#
+#    If the requested path contains /../ or is:
+#
+#    1. for a directory, and the path does not begin with one of:
+#        (a) /home/httpd/html/res/<domain>
+#        (b) /home/httpd/html/res/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:
+#    /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
+#
+#    the response will be "refused".
+#
 # Parameters:
 #    $cmd        - The command that dispatched us (ls).
 #    $ulsdir     - The directory path to list... I'm not sure what this
@@ -1421,8 +1460,17 @@ sub ls_handler {
     my $rights;
     my $ulsout='';
     my $ulsfn;
+    if ($ulsdir =~m{/\.\./}) {
+        &Failure($client,"refused\n",$userinput);
+        return 1;
+    }
     if (-e $ulsdir) {
 	if(-d $ulsdir) {
+            unless (($ulsdir =~ m{/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
+                    ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/userfiles/})) {
+                &Failure($client,"refused\n",$userinput);
+                return 1;
+            }
 	    if (opendir(LSDIR,$ulsdir)) {
 		while ($ulsfn=readdir(LSDIR)) {
 		    undef($obs);
@@ -1446,6 +1494,10 @@ sub ls_handler {
 		closedir(LSDIR);
 	    }
 	} else {
+            unless ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/}) {
+                &Failure($client,"refused\n",$userinput);
+                return 1;
+            }
 	    my @ulsstats=stat($ulsdir);
 	    $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
 	}
@@ -1470,6 +1522,20 @@ sub ls_handler {
 #    selected directory the filename followed by the full output of
 #    the stat function is returned.  The returned info for each
 #    file are separated by ':'.  The stat fields are separated by &'s.
+#
+#    If the requested path contains /../ or is:
+#
+#    1. for a directory, and the path does not begin with one of:
+#        (a) /home/httpd/html/res/<domain>
+#        (b) /home/httpd/html/res/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:
+#    /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
+#
+#    the response will be "refused".
+#
 # Parameters:
 #    $cmd        - The command that dispatched us (ls).
 #    $ulsdir     - The directory path to list... I'm not sure what this
@@ -1490,8 +1556,17 @@ sub ls2_handler {
     my $rights;
     my $ulsout='';
     my $ulsfn;
+    if ($ulsdir =~m{/\.\./}) {
+        &Failure($client,"refused\n",$userinput);
+        return 1;
+    }
     if (-e $ulsdir) {
         if(-d $ulsdir) {
+            unless (($ulsdir =~ m{/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
+                    ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/userfiles/})) {
+                &Failure($client,"refused\n","$userinput");
+                return 1;
+            }
             if (opendir(LSDIR,$ulsdir)) {
                 while ($ulsfn=readdir(LSDIR)) {
                     undef($obs);
@@ -1516,6 +1591,10 @@ sub ls2_handler {
                 closedir(LSDIR);
             }
         } else {
+            unless ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/}) {
+                &Failure($client,"refused\n",$userinput);
+                return 1;
+            }
             my @ulsstats=stat($ulsdir);
             $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
         }
@@ -1532,6 +1611,22 @@ sub ls2_handler {
 #    selected directory the filename followed by the full output of
 #    the stat function is returned.  The returned info for each
 #    file are separated by ':'.  The stat fields are separated by &'s.
+#
+#    If the requested path (after prepending) contains /../ or is:
+#
+#    1. for a directory, and the path does not begin with one of:
+#        (a) /home/httpd/html/res/<domain>
+#        (b) /home/httpd/html/res/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:
+#    /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
+#
+#    the response will be "refused".
+#
 # Parameters:
 #    $cmd        - The command that dispatched us (ls).
 #    $tail       - The tail of the request that invoked us.
@@ -1571,22 +1666,12 @@ sub ls3_handler {
     }
 
     my $dir_root = $perlvar{'lonDocRoot'};
-    if ($getpropath) {
+    if (($getpropath) || ($getuserdir)) {
         if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
             $dir_root = &propath($udom,$uname);
             $dir_root =~ s/\/$//;
         } else {
-            &Failure($client,"refused\n","$cmd:$tail");
-            return 1;
-        }
-    } elsif ($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:$tail");
+            &Failure($client,"refused\n",$userinput);
             return 1;
         }
     } elsif ($alternate_root ne '') {
@@ -1599,12 +1684,28 @@ sub ls3_handler {
             $ulsdir = $dir_root.'/'.$ulsdir;
         }
     }
+    if ($ulsdir =~m{/\.\./}) {
+        &Failure($client,"refused\n",$userinput);
+        return 1;
+    }
+    my $islocal;
+    my @machine_ids = &Apache::lonnet::current_machine_ids();
+    if (grep(/^\Q$clientname\E$/,@machine_ids)) {
+        $islocal = 1;
+    }
     my $obs;
     my $rights;
     my $ulsout='';
     my $ulsfn;
     if (-e $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_username/userfiles/}) ||
+                    (($ulsdir =~ m{/home/httpd/html/priv/$LONCAPA::match_domain/}) && ($islocal))) {
+                &Failure($client,"refused\n",$userinput);
+                return 1;
+            }
             if (opendir(LSDIR,$ulsdir)) {
                 while ($ulsfn=readdir(LSDIR)) {
                     undef($obs);
@@ -1629,6 +1730,11 @@ sub ls3_handler {
                 closedir(LSDIR);
             }
         } else {
+            unless (($getpropath) || ($getuserdir) ||
+                    ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/})) {
+                &Failure($client,"refused\n",$userinput);
+                return 1;
+            }
             my @ulsstats=stat($ulsdir);
             $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
         }
@@ -1641,6 +1747,80 @@ sub ls3_handler {
 }
 &register_handler("ls3", \&ls3_handler, 0, 1, 0);
 
+sub read_lonnet_global {
+    my ($cmd,$tail,$client) = @_;
+    my $userinput = "$cmd:$tail";
+    my $requested = &Apache::lonnet::thaw_unescape($tail);
+    my $result;
+    my %packagevars = (
+                        spareid => \%Apache::lonnet::spareid,
+                        perlvar => \%Apache::lonnet::perlvar,
+                      );
+    my %limit_to = (
+                    perlvar => {
+                                 lonOtherAuthen => 1,
+                                 lonBalancer    => 1,
+                                 lonVersion     => 1,
+                                 lonSysEMail    => 1,
+                                 lonHostID      => 1,
+                                 lonRole        => 1,
+                                 lonDefDomain   => 1,
+                                 lonLoadLim     => 1,
+                                 lonUserLoadLim => 1,
+                               }
+                  );
+    if (ref($requested) eq 'HASH') {
+        foreach my $what (keys(%{$requested})) {
+            my $response;
+            my $items = {};
+            if (exists($packagevars{$what})) {
+                if (ref($limit_to{$what}) eq 'HASH') {
+                    foreach my $varname (keys(%{$packagevars{$what}})) {
+                        if ($limit_to{$what}{$varname}) {
+                            $items->{$varname} = $packagevars{$what}{$varname};
+                        }
+                    }
+                } else {
+                    $items = $packagevars{$what};
+                }
+                if ($what eq 'perlvar') {
+                    if (!exists($packagevars{$what}{'lonBalancer'})) {
+                        if ($dist =~ /^(centos|rhes|fedora|scientific)/) {
+                            my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
+                            if (ref($othervarref) eq 'HASH') {
+                                $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
+                            }
+                        }
+                    }
+                }
+                $response = &Apache::lonnet::freeze_escape($items);
+            }
+            $result .= &escape($what).'='.$response.'&';
+        }
+    }
+    $result =~ s/\&$//;
+    &Reply($client,\$result,$userinput);
+    return 1;
+}
+&register_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
+
+sub server_devalidatecache_handler {
+    my ($cmd,$tail,$client) = @_;
+    my $userinput = "$cmd:$tail";
+    my $items = &unescape($tail);
+    my @cached = split(/\&/,$items);
+    foreach my $key (@cached) {
+        if ($key =~ /:/) {
+            my ($name,$id) = map { &unescape($_); } split(/:/,$key);
+            &Apache::lonnet::devalidate_cache_new($name,$id);
+        }
+    }
+    my $result = 'ok';
+    &Reply($client,\$result,$userinput);
+    return 1;
+}
+&register_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
+
 sub server_timezone_handler {
     my ($cmd,$tail,$client) = @_;
     my $userinput = "$cmd:$tail";
@@ -1921,15 +2101,14 @@ sub change_password_handler {
 	my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
 	if ($howpwd eq 'internal') {
 	    &Debug("internal auth");
-	    my $salt=time;
-	    $salt=substr($salt,6,2);
-	    my $ncpass=crypt($npass,$salt);
+            my $ncpass = &hash_passwd($udom,$npass);
 	    if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
 		my $msg="Result of password change for $uname: pwchange_success";
                 if ($lonhost) {
                     $msg .= " - request originated from: $lonhost";
                 }
                 &logthis($msg);
+                &update_passwd_history($uname,$udom,$howpwd,$context);
 		&Reply($client, "ok\n", $userinput);
 	    } else {
 		&logthis("Unable to open $uname passwd "               
@@ -1938,6 +2117,9 @@ sub change_password_handler {
 	    }
 	} elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
 	    my $result = &change_unix_password($uname, $npass);
+            if ($result eq 'ok') {
+                &update_passwd_history($uname,$udom,$howpwd,$context);
+            }
 	    &logthis("Result of password change for $uname: ".
 		     $result);
 	    &Reply($client, \$result, $userinput);
@@ -1960,6 +2142,38 @@ sub change_password_handler {
 }
 &register_handler("passwd", \&change_password_handler, 1, 1, 0);
 
+sub hash_passwd {
+    my ($domain,$plainpass,@rest) = @_;
+    my ($salt,$cost);
+    if (@rest) {
+        $cost = $rest[0];
+        # salt is first 22 characters, base-64 encoded by bcrypt
+        my $plainsalt = substr($rest[1],0,22);
+        $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt);
+    } else {
+        my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
+        my $defaultcost = $domdefaults{'intauth_cost'};
+        if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
+            $cost = 10;
+        } else {
+            $cost = $defaultcost;
+        }
+        # Generate random 16-octet base64 salt
+        $salt = "";
+        $salt .= pack("C", int rand(256)) for 1..16;
+    }
+    my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({
+        key_nul => 1,
+        cost    => $cost,
+        salt    => $salt,
+    }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass)));
+
+    my $result = join("!", "", "bcrypt", sprintf("%02d",$cost),
+                &Crypt::Eksblowfish::Bcrypt::en_base64($salt).
+                &Crypt::Eksblowfish::Bcrypt::en_base64($hash));
+    return $result;
+}
+
 #
 #   Create a new user.  User in this case means a lon-capa user.
 #   The user must either already exist in some authentication realm
@@ -2003,7 +2217,8 @@ sub add_user_handler {
 		    ."makeuser";
 	    }
 	    unless ($fperror) {
-		my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
+		my $result=&make_passwd_file($uname,$udom,$umode,$npass,
+                                             $passfilename,'makeuser');
 		&Reply($client,\$result, $userinput);     #BUGBUG - could be fail
 	    } else {
 		&Failure($client, \$fperror, $userinput);
@@ -2064,36 +2279,30 @@ sub change_authentication_handler {
 	my $passfilename = &password_path($udom, $uname);
 	if ($passfilename) {	# Not allowed to create a new user!!
 	    # If just changing the unix passwd. need to arrange to run
-	    # passwd since otherwise make_passwd_file will run
-	    # lcuseradd which fails if an account already exists
-	    # (to prevent an unscrupulous LONCAPA admin from stealing
-	    # an existing account by overwriting it as a LonCAPA account).
+	    # passwd since otherwise make_passwd_file will fail as 
+	    # creation of unix authenticated users is no longer supported
+            # except from the command line, when running make_domain_coordinator.pl
 
 	    if(($oldauth =~/^unix/) && ($umode eq "unix")) {
 		my $result = &change_unix_password($uname, $npass);
 		&logthis("Result of password change for $uname: ".$result);
 		if ($result eq "ok") {
+                    &update_passwd_history($uname,$udom,$umode,'changeuserauth');
 		    &Reply($client, \$result);
 		} else {
 		    &Failure($client, \$result);
 		}
 	    } else {
-		my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
+		my $result=&make_passwd_file($uname,$udom,$umode,$npass,
+                                             $passfilename,'changeuserauth');
 		#
 		#  If the current auth mode is internal, and the old auth mode was
 		#  unix, or krb*,  and the user is an author for this domain,
 		#  re-run manage_permissions for that role in order to be able
 		#  to take ownership of the construction space back to www:www
 		#
-		
-		
-		if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
-		    (($oldauth =~ /^internal/) && ($umode eq "unix")) ) { 
-		    if(&is_author($udom, $uname)) {
-			&Debug(" Need to manage author permissions...");
-			&manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
-		    }
-		}
+
+
 		&Reply($client, \$result, $userinput);
 	    }
 	       
@@ -2106,6 +2315,17 @@ sub change_authentication_handler {
 }
 &register_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
 
+sub update_passwd_history {
+    my ($uname,$udom,$umode,$context) = @_;
+    my $proname=&propath($udom,$uname);
+    my $now = time;
+    if (open(my $fh,">>$proname/passwd.log")) {
+        print $fh "$now:$umode:$context\n";
+        close($fh);
+    }
+    return;
+}
+
 #
 #   Determines if this is the home server for a user.  The home server
 #   for a user will have his/her lon-capa passwd file.  Therefore all we need
@@ -2280,7 +2500,8 @@ sub fetch_user_file_handler {
 	my $transname=$udir.'/'.$ufile.'.in.transit';
         my $clientprotocol=$Apache::lonnet::protocol{$clientname};
         $clientprotocol = 'http' if ($clientprotocol ne 'https');
-	my $remoteurl=$clientprotocol.'://'.$clientip.'/userfiles/'.$fname;
+	my $clienthost = &Apache::lonnet::hostname($clientname);
+	my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
 	my $response;
 	Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
 	alarm(120);
@@ -2302,6 +2523,24 @@ sub fetch_user_file_handler {
 		unlink($transname);
 		&Failure($client, "failed\n", $userinput);
 	    } else {
+                if ($fname =~ /^default.+\.(page|sequence)$/) {
+                    my ($major,$minor) = split(/\./,$clientversion);
+                    if (($major < 2) || ($major == 2 && $minor < 11)) {
+                        my $now = time;
+                        &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
+                        my $key = &escape('internal.contentchange');
+                        my $what = "$key=$now";
+                        my $hashref = &tie_user_hash($udom,$uname,'environment',
+                                                     &GDBM_WRCREAT(),"P",$what);
+                        if ($hashref) {
+                            $hashref->{$key}=$now;
+                            if (!&untie_user_hash($hashref)) {
+                                &logthis("error: ".($!+0)." untie (GDBM) failed ".
+                                         "when updating internal.contentchange");
+                            }
+                        }
+                    }
+                }
 		&Reply($client, "ok\n", $userinput);
 	    }
 	}   
@@ -2338,11 +2577,20 @@ sub remove_user_file_handler {
 	    if (-e $file) {
 		#
 		#   If the file is a regular file unlink is fine...
-		#   However it's possible the client wants a dir.
-		#   removed, in which case rmdir is more approprate:
+		#   However it's possible the client wants a dir
+		#   removed, in which case rmdir is more appropriate
+	        #   Note: rmdir will only remove an empty directory.
 		#
 	        if (-f $file){
 		    unlink($file);
+                    # for html files remove the associated .bak file
+                    # which may have been created by the editor.
+                    if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) {
+                        my $path = $1;
+                        if (-e $file.'.bak') {
+                            unlink($file.'.bak');
+                        }
+                    }
 		} elsif(-d $file) {
 		    rmdir($file);
 		}
@@ -2705,6 +2953,10 @@ sub newput_user_profile_entry {
     foreach my $pair (@pairs) {
 	my ($key,$value)=split(/=/,$pair);
 	if (exists($hashref->{$key})) {
+            if (!&untie_user_hash($hashref)) {
+                &logthis("error: ".($!+0)." untie (GDBM) failed ".
+                         "while attempting newput - early out as key exists");
+            }
 	    &Failure($client, "key_exists: ".$key."\n",$userinput);
 	    return 1;
 	}
@@ -3174,6 +3426,9 @@ sub dump_profile_database {
 #                                             that is matched against
 #                                             database keywords to do
 #                                             selective dumps.
+#                               range       - optional range of entries
+#                                             e.g., 10-20 would return the
+#                                             10th to 19th items, etc.  
 #   $client                   - Channel open on the client.
 # Returns:
 #    1    - Continue processing.
@@ -3183,93 +3438,12 @@ sub dump_profile_database {
 sub dump_with_regexp {
     my ($cmd, $tail, $client) = @_;
 
+    my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
 
-    my $userinput = "$cmd:$tail";
-
-    my ($udom,$uname,$namespace,$regexp,$range,$extra)=split(/:/,$tail);
-    if (defined($regexp)) {
-	$regexp=&unescape($regexp);
-    } else {
-	$regexp='.';
-    }
-    my ($start,$end);
-    if (defined($range)) {
-	if ($range =~/^(\d+)\-(\d+)$/) {
-	    ($start,$end) = ($1,$2);
-	} elsif ($range =~/^(\d+)$/) {
-	    ($start,$end) = (0,$1);
-	} else {
-	    undef($range);
-	}
-    }
-    my $hashref = &tie_user_hash($udom, $uname, $namespace,
-				 &GDBM_READER());
-    my $skipcheck;
-    if ($hashref) {
-        my $qresult='';
-	my $count=0;
-        if ($extra ne '') {
-            $extra = &Apache::lonnet::thaw_unescape($extra);
-            $skipcheck = $extra->{'skipcheck'};
-        }
-        my @ids = &Apache::lonnet::current_machine_ids();
-        my (%homecourses,$major,$minor,$now);
-        if (($namespace eq 'roles') && (!$skipcheck)) {
-            my $loncaparev = $clientversion;
-            if ($loncaparev eq '') {
-                $loncaparev = $Apache::lonnet::loncaparevs{$clientname};
-            }
-            if ($loncaparev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?/) {
-                $major = $1;
-                $minor = $2;
-            }
-            $now = time;
-        }
-	while (my ($key,$value) = each(%$hashref)) {
-            if ($namespace eq 'roles') {
-                if ($key =~ m{^/($LONCAPA::match_domain)/($LONCAPA::match_courseid)(/?[^_]*)_(cc|co|in|ta|ep|ad|st|cr)$}) {
-                    my $cdom = $1;
-                    my $cnum = $2;
-                    unless ($skipcheck) {
-                        my ($role,$end,$start) = split(/\_/,$value);
-                        if (!$end || $end > $now) {
-                            next unless (&releasereqd_check($cnum,$cdom,$key,$value,$major,
-                                                            $minor,\%homecourses,\@ids));
-                        }
-                    }
-                }
-            }
-	    if ($regexp eq '.') {
-		$count++;
-		if (defined($range) && $count >= $end)   { last; }
-		if (defined($range) && $count <  $start) { next; }
-		$qresult.=$key.'='.$value.'&';
-	    } else {
-		my $unescapeKey = &unescape($key);
-		if (eval('$unescapeKey=~/$regexp/')) {
-		    $count++;
-		    if (defined($range) && $count >= $end)   { last; }
-		    if (defined($range) && $count <  $start) { next; }
-		    $qresult.="$key=$value&";
-		}
-	    }
-	}
-	if (&untie_user_hash($hashref)) {
-            if (($namespace eq 'roles') && (!$skipcheck)) {
-                if (keys(%homecourses) > 0) {
-                    $qresult .= &check_homecourses(\%homecourses,$udom,$regexp,$count,
-                                                   $range,$start,$end,$major,$minor);
-                }
-            }
-	    chop($qresult);
-	    &Reply($client, \$qresult, $userinput);
-	} else {
-	    &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
-		     "while attempting dump\n", $userinput);
-	}
+    if ($res =~ /^error:/) {
+        &Failure($client, \$res, "$cmd:$tail");
     } else {
-	&Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
-		"while attempting dump\n", $userinput);
+        &Reply($client, \$res, "$cmd:$tail");
     }
 
     return 1;
@@ -3286,6 +3460,9 @@ sub dump_with_regexp {
 #                          namespace   - Name of the database being modified
 #                          rid         - Resource keyword to modify.
 #                          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.
 #
@@ -3294,23 +3471,47 @@ sub dump_with_regexp {
 #      1 (keep on processing).
 #  Side-Effects:
 #    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 $numtrans
+#    is the number of store evevnts recorded for rid in namespace since
+#    lonnet::store() was called by the client.
+#
 sub store_handler {
     my ($cmd, $tail, $client) = @_;
  
     my $userinput = "$cmd:$tail";
 
-    my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
+    chomp($tail);
+    my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
     if ($namespace ne 'roles') {
 
-	chomp($what);
 	my @pairs=split(/\&/,$what);
 	my $hashref  = &tie_user_hash($udom, $uname, $namespace,
 				       &GDBM_WRCREAT(), "S",
 				       "$rid:$what");
 	if ($hashref) {
 	    my $now = time;
-	    my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
-	    my $key;
+            my $numtrans;
+            if ($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"}++;
 	    my $version=$hashref->{"version:$rid"};
 	    my $allkeys=''; 
@@ -3323,7 +3524,11 @@ sub store_handler {
 	    $allkeys.='timestamp';
 	    $hashref->{"$version:keys:$rid"}=$allkeys;
 	    if (&untie_user_hash($hashref)) {
-		&Reply($client, "ok\n", $userinput);
+                my $msg = 'ok';
+                if ($numtrans) {
+                    $msg = 'delay:'.$numtrans;
+                }
+                &Reply($client, "$msg\n", $userinput);
 	    } else {
 		&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
 			"while attempting store\n", $userinput);
@@ -3585,6 +3790,37 @@ sub send_query_handler {
 
     my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
     $query=~s/\n*$//g;
+    if (($query eq 'usersearch') || ($query eq 'instdirsearch')) {
+        my $usersearchconf = &get_usersearch_config($currentdomainid,'directorysrch');
+        my $earlyout;
+        if (ref($usersearchconf) eq 'HASH') {
+            if ($currentdomainid eq $clienthomedom) {
+                if ($query eq 'usersearch') {
+                    if ($usersearchconf->{'lcavailable'} eq '0') {
+                        $earlyout = 1;
+                    }
+                } else {
+                    if ($usersearchconf->{'available'} eq '0') {
+                        $earlyout = 1;
+                    }
+                }
+            } else {
+                if ($query eq 'usersearch') {
+                    if ($usersearchconf->{'lclocalonly'}) {
+                        $earlyout = 1;
+                    }
+                } else {
+                    if ($usersearchconf->{'localonly'}) {
+                        $earlyout = 1;
+                    }
+                }
+            }
+        }
+        if ($earlyout) {
+            &Reply($client, "query_not_authorized\n");
+            return 1;
+        }
+    }
     &Reply($client, "". &sql_reply("$clientname\&$query".
 				"\&$arg1"."\&$arg2"."\&$arg3")."\n",
 	  $userinput);
@@ -3839,7 +4075,9 @@ sub put_course_id_hash_handler {
 #                 creationcontext - include courses created in specified context 
 #
 #                 domcloner - flag to indicate if user can create CCs in course's domain.
-#                             If so, ability to clone course is automatic. 
+#                             If so, ability to clone course is automatic.
+#                 hasuniquecode - filter by courses for which a six character unique code has
+#                                 been set.
 #
 #     $client  - The socket open on the client.
 # Returns:
@@ -3853,7 +4091,7 @@ sub dump_course_id_handler {
     my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
         $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
         $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
-        $creationcontext,$domcloner) =split(/:/,$tail);
+        $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail);
     my $now = time;
     my ($cloneruname,$clonerudom,%cc_clone);
     if (defined($description)) {
@@ -3926,8 +4164,11 @@ sub dump_course_id_handler {
     } else {
         $creationcontext = '.';
     }
+    unless ($hasuniquecode) {
+        $hasuniquecode = '.';
+    }
     my $unpack = 1;
-    if ($description eq '.' && $instcodefilter eq '.' && $coursefilter eq '.' && 
+    if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' && 
         $typefilter eq '.') {
         $unpack = 0;
     }
@@ -4014,6 +4255,9 @@ sub dump_course_id_handler {
                 $selfenroll_end = $items->{'selfenroll_end_date'};
                 $created = $items->{'created'};
                 $context = $items->{'context'};
+                if ($hasuniquecode ne '.') {
+                    next unless ($items->{'uniquecode'});
+                }
                 if ($selfenrollonly) {
                     next if (!$selfenroll_types);
                     if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
@@ -4436,6 +4680,49 @@ sub get_id_handler {
 }
 &register_handler("idget", \&get_id_handler, 0, 1, 0);
 
+#   Deletes one or more ids in a domain's id database.
+#
+#   Parameters:
+#       $cmd                  - Command keyword (iddel).
+#       $tail                 - Command tail.  In this case a colon
+#                               separated list containing:
+#                               The domain for which we are deleting the id(s).
+#                               &-separated list of id(s) to delete.
+#       $client               - File open on client socket.
+# Returns:
+#     1   - Continue processing
+#     0   - Exit server.
+#
+#
+
+sub del_id_handler {
+    my ($cmd,$tail,$client) = @_;
+
+    my $userinput = "$cmd:$tail";
+
+    my ($udom,$what)=split(/:/,$tail);
+    chomp($what);
+    my $hashref = &tie_domain_hash($udom, "ids", &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 iddel\n", $userinput);
+        }
+    } else {
+        &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
+                 "while attempting iddel\n", $userinput);
+    }
+    return 1;
+}
+&register_handler("iddel", \&del_id_handler, 0, 1, 0);
+
 #
 # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database 
 #
@@ -4984,9 +5271,10 @@ sub validate_instcode_handler {
     my ($dom,$instcode,$owner) = split(/:/, $tail);
     $instcode = &unescape($instcode);
     $owner = &unescape($owner);
-    my ($outcome,$description) = 
+    my ($outcome,$description,$credits) = 
         &localenroll::validate_instcode($dom,$instcode,$owner);
-    my $result = &escape($outcome).'&'.&escape($description);
+    my $result = &escape($outcome).'&'.&escape($description).'&'.
+                 &escape($credits);
     &Reply($client, \$result, $userinput);
 
     return 1;
@@ -5150,13 +5438,59 @@ sub create_auto_enroll_password_handler
 &register_handler("autocreatepassword", \&create_auto_enroll_password_handler, 
 		  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,
+                  0, 1, 0);
+
+
 #   Retrieve and remove temporary files created by/during autoenrollment.
 #
 # Formal Parameters:
 #    $cmd      - The command that got us dispatched.
 #    $tail     - The tail of the command.  In our case this is a colon 
 #                separated list that will be split into:
-#                $filename - The name of the file to remove.
+#                $filename - The name of the file to retrieve.
 #                            The filename is given as a path relative to
 #                            the LonCAPA temp file directory.
 #    $client   - Socket open on the client.
@@ -5170,7 +5504,11 @@ sub retrieve_auto_file_handler {
     my ($filename)   = split(/:/, $tail);
 
     my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
-    if ( (-e $source) && ($filename ne '') ) {
+    if ($filename =~m{/\.\./}) {
+        &Failure($client, "refused\n", $userinput);
+    } elsif ($filename !~ /^$LONCAPA::match_domain\_$LONCAPA::match_courseid\_.+_classlist\.xml$/) {
+        &Failure($client, "refused\n", $userinput);
+    } elsif ( (-e $source) && ($filename ne '') ) {
 	my $reply = '';
 	if (open(my $fh,$source)) {
 	    while (<$fh>) {
@@ -5202,7 +5540,7 @@ sub crsreq_checks_handler {
     my $userinput = "$cmd:$tail";
     my $dom = $tail;
     my $result;
-    my @reqtypes = ('official','unofficial','community');
+    my @reqtypes = ('official','unofficial','community','textbook');
     eval {
         local($SIG{__DIE__})='DEFAULT';
         my %validations;
@@ -5229,19 +5567,20 @@ sub crsreq_checks_handler {
 sub validate_crsreq_handler {
     my ($cmd, $tail, $client) = @_;
     my $userinput = "$cmd:$tail";
-    my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist) = split(/:/, $tail);
+    my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail);
     $instcode = &unescape($instcode);
     $owner = &unescape($owner);
     $crstype = &unescape($crstype);
     $inststatuslist = &unescape($inststatuslist);
     $instcode = &unescape($instcode);
     $instseclist = &unescape($instseclist);
+    my $custominfo = &Apache::lonnet::thaw_unescape($customdata);
     my $outcome;
     eval {
         local($SIG{__DIE__})='DEFAULT';
         $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
                                                  $inststatuslist,$instcode,
-                                                 $instseclist);
+                                                 $instseclist,$custominfo);
     };
     if (!$@) {
         &Reply($client, \$outcome, $userinput);
@@ -5252,6 +5591,53 @@ sub validate_crsreq_handler {
 }
 &register_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
 
+sub crsreq_update_handler {
+    my ($cmd, $tail, $client) = @_;
+    my $userinput = "$cmd:$tail";
+    my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code,
+        $accessstart,$accessend,$infohashref) =
+        split(/:/, $tail);
+    $crstype = &unescape($crstype);
+    $action = &unescape($action);
+    $ownername = &unescape($ownername);
+    $ownerdomain = &unescape($ownerdomain);
+    $fullname = &unescape($fullname);
+    $title = &unescape($title);
+    $code = &unescape($code);
+    $accessstart = &unescape($accessstart);
+    $accessend = &unescape($accessend);
+    my $incoming = &Apache::lonnet::thaw_unescape($infohashref);
+    my ($result,$outcome);
+    eval {
+        local($SIG{__DIE__})='DEFAULT';
+        my %rtnhash;
+        $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action,
+                                                $ownername,$ownerdomain,$fullname,
+                                                $title,$code,$accessstart,$accessend,
+                                                $incoming,\%rtnhash);
+        if ($outcome eq 'ok') {
+            my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
+            foreach my $key (keys(%rtnhash)) {
+                if (grep(/^\Q$key\E/,@posskeys)) {
+                    $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
+                }
+            }
+            $result =~ s/\&$//;
+        }
+    };
+    if (!$@) {
+        if ($outcome eq 'ok') {
+            &Reply($client, \$result, $userinput);
+        } else {
+            &Reply($client, "format_error\n", $userinput);
+        }
+    } else {
+        &Failure($client,"unknown_cmd\n",$userinput);
+    }
+    return 1;
+}
+&register_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0);
+
 #
 #   Read and retrieve institutional code format (for support form).
 # Formal Parameters:
@@ -5959,18 +6345,6 @@ sub lcpasswdstrerror {
     }
 }
 
-#
-# Convert an error return code from lcuseradd to a string value:
-#
-sub lcuseraddstrerror {
-    my $ErrorCode = shift;
-    if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
-	return "lcuseradd - Unrecognized error code: ".$ErrorCode;
-    } else {
-	return $adderrors[$ErrorCode];
-    }
-}
-
 # grabs exception and records it to log before exiting
 sub catchexception {
     my ($error)=@_;
@@ -6364,7 +6738,7 @@ $SIG{USR2} = \&UpdateHosts;
 &Apache::lonnet::load_hosts_tab();
 my %iphost = &Apache::lonnet::get_iphost(1);
 
-my $dist=`$perlvar{'lonDaemons'}/distprobe`;
+$dist=`$perlvar{'lonDaemons'}/distprobe`;
 
 my $arch = `uname -i`;
 chomp($arch);
@@ -6456,10 +6830,28 @@ sub make_new_child {
 #        my $tmpsnum=0;            # Now global
 #---------------------------------------------------- kerberos 5 initialization
         &Authen::Krb5::init_context();
-	unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||  
-		($dist eq 'fedora6') || ($dist eq 'suse9.3')) {
-	    &Authen::Krb5::init_ets();
-	}
+
+        my $no_ets;
+        if ($dist =~ /^(?:centos|rhes|scientific)(\d+)$/) {
+            if ($1 >= 7) {
+                $no_ets = 1;
+            }
+        } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
+            if (($1 eq '9.3') || ($1 >= 12.2)) {
+                $no_ets = 1;
+            }
+        } elsif ($dist =~ /^sles(\d+)$/) {
+            if ($1 > 11) {
+                $no_ets = 1;
+            }
+        } elsif ($dist =~ /^fedora(\d+)$/) {
+            if ($1 < 7) {
+                $no_ets = 1;
+            }
+        }
+        unless ($no_ets) {
+            &Authen::Krb5::init_ets();
+        }
 
 	&status('Accepted connection');
 # =============================================================================
@@ -6503,6 +6895,12 @@ sub make_new_child {
 		#  If the remote is attempting a local init... give that a try:
 		#
 		(my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
+                # For LON-CAPA 2.9, the  client session will have sent its LON-CAPA
+                # version when initiating the connection. For LON-CAPA 2.8 and older,
+                # the version is retrieved from the global %loncaparevs in lonnet.pm.
+                # $clientversion contains path to keyfile if $inittype eq 'local'
+                # it's overridden below in this case
+                $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
 
 		# If the connection type is ssl, but I didn't get my
 		# certificate files yet, then I'll drop  back to 
@@ -6567,7 +6965,6 @@ sub make_new_child {
 				  ."Attempted insecure connection disallowed </font>");
 			close $client;
 			$clientok = 0;
-			
 		    }
 		}
 	    } else {
@@ -6576,7 +6973,6 @@ sub make_new_child {
 			 ."$clientip failed to initialize: >$remotereq< </font>");
 		&status('No init '.$clientip);
 	    }
-	    
 	} else {
 	    &logthis(
 		     "<font color='blue'>WARNING: Unknown client $clientip</font>");
@@ -6646,22 +7042,29 @@ sub is_author {
 
     #  Author role should show up as a key /domain/_au
 
-    my $key    = "/$domain/_au";
     my $value;
-    if (defined($hashref)) {
-	$value = $hashref->{$key};
-    }
+    if ($hashref) {
 
-    if(defined($value)) {
-	&Debug("$user @ $domain is an author");
+	my $key    = "/$domain/_au";
+	if (defined($hashref)) {
+	    $value = $hashref->{$key};
+	    if(!untie_user_hash($hashref)) {
+		return 'error: ' .  ($!+0)." untie (GDBM) Failed";
+	    }
+	}
+	
+	if(defined($value)) {
+	    &Debug("$user @ $domain is an author");
+	}
+    } else {
+	return 'error: '.($!+0)." tie (GDBM) Failed";
     }
 
     return defined($value);
 }
 #
 #   Checks to see if the input roleput request was to set
-# an author role.  If so, invokes the lchtmldir script to set
-# up a correct public_html 
+# an author role.  If so, creates construction space 
 # Parameters:
 #    request   - The request sent to the rolesput subchunk.
 #                We're looking for  /domain/_au
@@ -6671,16 +7074,15 @@ sub is_author {
 #
 sub manage_permissions {
     my ($request, $domain, $user, $authtype) = @_;
-
-    &Debug("manage_permissions: $request $domain $user $authtype");
-
     # See if the request is of the form /$domain/_au
     if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
-	my $execdir = $perlvar{'lonDaemons'};
-	my $userhome= "/home/$user" ;
-	&logthis("system $execdir/lchtmldir $userhome $user $authtype");
-	&Debug("Setting homedir permissions for $userhome");
-	system("$execdir/lchtmldir $userhome $user $authtype");
+        my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
+        unless (-e $path) {        
+           mkdir($path);
+        }
+        unless (-e $path.'/'.$user) {
+           mkdir($path.'/'.$user);
+        }
     }
 }
 
@@ -6728,15 +7130,25 @@ sub password_filename {
 #    domain    - domain of the user.
 #    name      - User's name.
 #    contents  - New contents of the file.
+#    saveold   - (optional). If true save old file in a passwd.bak file.
 # Returns:
 #   0    - Failed.
 #   1    - Success.
 #
 sub rewrite_password_file {
-    my ($domain, $user, $contents) = @_;
+    my ($domain, $user, $contents, $saveold) = @_;
 
     my $file = &password_filename($domain, $user);
     if (defined $file) {
+        if ($saveold) {
+            my $bakfile = $file.'.bak';
+            if (CopyFile($file,$bakfile)) {
+                chmod(0400,$bakfile);
+                &logthis("Old password saved in passwd.bak for internally authenticated user: $user:$domain");
+            } else {
+                &logthis("Failed to save old password in passwd.bak for internally authenticated user: $user:$domain");
+            }
+        }
 	my $pf = IO::File->new(">$file");
 	if($pf) {
 	    print $pf "$contents\n";
@@ -6827,10 +7239,28 @@ sub validate_user {
                 $contentpwd = $domdefaults{'auth_arg_def'}; 
             }
         }
-    } 
+    }
     if ($howpwd ne 'nouser') {
 	if($howpwd eq "internal") { # Encrypted is in local password file.
-	    $validated = (crypt($password, $contentpwd) eq $contentpwd);
+            if (length($contentpwd) == 13) {
+                $validated = (crypt($password,$contentpwd) eq $contentpwd);
+                if ($validated) {
+                    my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
+                    if ($domdefaults{'intauth_switch'}) {
+                        my $ncpass = &hash_passwd($domain,$password);
+                        my $saveold;
+                        if ($domdefaults{'intauth_switch'} == 2) {
+                            $saveold = 1;
+                        }
+                        if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass",$saveold)) {
+                            &update_passwd_history($user,$domain,$howpwd,'conversion');
+                            &logthis("Validated password hashed with bcrypt for $user:$domain");
+                        }
+                    }
+                }
+            } else {
+                $validated = &check_internal_passwd($password,$contentpwd,$domain,$user);
+            }
 	}
 	elsif ($howpwd eq "unix") { # User is a normal unix user.
 	    $contentpwd = (getpwnam($user))[1];
@@ -6898,6 +7328,50 @@ sub validate_user {
     return $validated;
 }
 
+sub check_internal_passwd {
+    my ($plainpass,$stored,$domain,$user) = @_;
+    my (undef,$method,@rest) = split(/!/,$stored);
+    if ($method eq 'bcrypt') {
+        my $result = &hash_passwd($domain,$plainpass,@rest);
+        if ($result ne $stored) {
+            return 0;
+        }
+        my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
+        if ($domdefaults{'intauth_check'}) {
+            # Upgrade to a larger number of rounds if necessary
+            my $defaultcost = $domdefaults{'intauth_cost'};
+            if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
+                $defaultcost = 10;
+            }
+            if (int($rest[0])<int($defaultcost)) {
+                if ($domdefaults{'intauth_check'} == 1) {
+                    my $ncpass = &hash_passwd($domain,$plainpass);
+                    if (&rewrite_password_file($domain,$user,"internal:$ncpass")) {
+                        &update_passwd_history($user,$domain,'internal','update cost');
+                        &logthis("Validated password hashed with bcrypt for $user:$domain");
+                    }
+                    return 1;
+                } elsif ($domdefaults{'intauth_check'} == 2) {
+                    return 0;
+                }
+            }
+        } else {
+            return 1;
+        }
+    }
+    return 0;
+}
+
+sub get_last_authchg {
+    my ($domain,$user) = @_;
+    my $lastmod;
+    my $logname = &propath($domain,$user).'/passwd.log';
+    if (-e "$logname") {
+        $lastmod = (stat("$logname"))[9];
+    }
+    return $lastmod;
+}
+
 sub krb4_authen {
     my ($password,$null,$user,$contentpwd) = @_;
     my $validated = 0;
@@ -7213,26 +7687,26 @@ sub change_unix_password {
 
 
 sub make_passwd_file {
-    my ($uname, $umode,$npass,$passfilename)=@_;
+    my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
     my $result="ok";
     if ($umode eq 'krb4' or $umode eq 'krb5') {
 	{
 	    my $pf = IO::File->new(">$passfilename");
 	    if ($pf) {
 		print $pf "$umode:$npass\n";
+                &update_passwd_history($uname,$udom,$umode,$action);
 	    } else {
 		$result = "pass_file_failed_error";
 	    }
 	}
     } elsif ($umode eq 'internal') {
-	my $salt=time;
-	$salt=substr($salt,6,2);
-	my $ncpass=crypt($npass,$salt);
+        my $ncpass = &hash_passwd($udom,$npass);
 	{
 	    &Debug("Creating internal auth");
 	    my $pf = IO::File->new(">$passfilename");
 	    if($pf) {
 		print $pf "internal:$ncpass\n"; 
+                &update_passwd_history($uname,$udom,$umode,$action);
 	    } else {
 		$result = "pass_file_failed_error";
 	    }
@@ -7242,60 +7716,14 @@ sub make_passwd_file {
 	    my $pf = IO::File->new(">$passfilename");
 	    if($pf) {
 		print $pf "localauth:$npass\n";
+                &update_passwd_history($uname,$udom,$umode,$action);
 	    } else {
 		$result = "pass_file_failed_error";
 	    }
 	}
     } elsif ($umode eq 'unix') {
-	{
-	    #
-	    #  Don't allow the creation of privileged accounts!!! that would
-	    #  be real bad!!!
-	    #
-	    my $uid = getpwnam($uname);
-	    if((defined $uid) && ($uid == 0)) {
-		&logthis(">>>Attempted to create privilged account blocked");
-		return "no_priv_account_error\n";
-	    }
-
-	    my $execpath       ="$perlvar{'lonDaemons'}/"."lcuseradd";
-
-	    my $lc_error_file  = $execdir."/tmp/lcuseradd".$$.".status";
-	    {
-		&Debug("Executing external: ".$execpath);
-		&Debug("user  = ".$uname.", Password =". $npass);
-		my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
-		print $se "$uname\n";
-		print $se "$npass\n";
-		print $se "$npass\n";
-		print $se "$lc_error_file\n"; # Status -> unique file.
-	    }
-	    if (-r $lc_error_file) {
-		&Debug("Opening error file: $lc_error_file");
-		my $error = IO::File->new("< $lc_error_file");
-		my $useraddok = <$error>;
-		$error->close;
-		unlink($lc_error_file);
-		
-		chomp $useraddok;
-	
-		if($useraddok > 0) {
-		    my $error_text = &lcuseraddstrerror($useraddok);
-		    &logthis("Failed lcuseradd: $error_text");
-		    $result = "lcuseradd_failed:$error_text";
-		}  else {
-		    my $pf = IO::File->new(">$passfilename");
-		    if($pf) {
-			print $pf "unix:\n";
-		    } else {
-			$result = "pass_file_failed_error";
-		    }
-		}
-	    }  else {
-		&Debug("Could not locate lcuseradd error: $lc_error_file");
-		$result="bug_lcuseradd_no_output_file";
-	    }
-	}
+	&logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users.");
+	$result="no_new_unix_accounts";
     } elsif ($umode eq 'none') {
 	{
 	    my $pf = IO::File->new("> $passfilename");
@@ -7359,168 +7787,19 @@ sub get_usersession_config {
     return;
 }
 
-sub releasereqd_check {
-    my ($cnum,$cdom,$key,$value,$major,$minor,$homecourses,$ids) = @_;
-    my $home = &Apache::lonnet::homeserver($cnum,$cdom);
-    return if ($home eq 'no_host');
-    my ($reqdmajor,$reqdminor,$displayrole);
-    if ($cnum =~ /$LONCAPA::match_community/) {
-        if ($major eq '' && $minor eq '') {
-            return unless ((ref($ids) eq 'ARRAY') && 
-                           (grep(/^\Q$home\E$/,@{$ids})));
-        } else {
-            $reqdmajor = 2;
-            $reqdminor = 9;
-            return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
-        }
-    }
-    my $hashid = $cdom.':'.$cnum;
-    my ($courseinfo,$cached) =
-        &Apache::lonnet::is_cached_new('courseinfo',$hashid);
+sub get_usersearch_config {
+    my ($dom,$name) = @_;
+    my ($usersearchconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
     if (defined($cached)) {
-        if (ref($courseinfo) eq 'HASH') {
-            if (exists($courseinfo->{'releaserequired'})) {
-                my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'});
-                return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
-            }
-        }
-    } else {
-        if (ref($ids) eq 'ARRAY') {
-            if (grep(/^\Q$home\E$/,@{$ids})) {
-                if (ref($homecourses) eq 'HASH') {
-                    if (ref($homecourses->{$hashid}) eq 'ARRAY') {
-                        push(@{$homecourses->{$hashid}},{$key=>$value});
-                    } else {
-                        $homecourses->{$hashid} = [{$key=>$value}];
-                    }
-                }
-                return;
-            }
-        }
-        my $courseinfo = &get_courseinfo_hash($cnum,$cdom,$home);
-        if (ref($courseinfo) eq 'HASH') {
-            if (exists($courseinfo->{'releaserequired'})) {
-                my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'});
-                return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor));
-            }
-        } else {
-            return;
-        }
-    }
-    return 1;
-}
-
-sub get_courseinfo_hash {
-    my ($cnum,$cdom,$home) = @_;
-    my %info;
-    eval {
-        local($SIG{ALRM}) = sub { die "timeout\n"; };
-        local($SIG{__DIE__})='DEFAULT';
-        alarm(3);
-        %info = &Apache::lonnet::courseiddump($cdom,'.',1,'.','.',$cnum,1,[$home],'.');
-        alarm(0);
-    };
-    if ($@) {
-        if ($@ eq "timeout\n") {
-            &logthis("<font color='blue'>WARNING courseiddump for $cnum:$cdom from $home timedout</font>");
-        } else {
-            &logthis("<font color='yellow'>WARNING unexpected error during eval of call for courseiddump from $home</font>");
-        }
+        return $usersearchconf;
     } else {
-        if (ref($info{$cdom.'_'.$cnum}) eq 'HASH') {
-            my $hashid = $cdom.':'.$cnum;
-            return &Apache::lonnet::do_cache_new('courseinfo',$hashid,$info{$cdom.'_'.$cnum},600);
-        }
+        my %domconfig = &Apache::lonnet::get_dom('configuration',['directorysrch'],$dom);
+        &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'directorysrch'},3600);
+        return $domconfig{'directorysrch'};
     }
     return;
 }
 
-sub check_homecourses {
-    my ($homecourses,$udom,$regexp,$count,$range,$start,$end,$major,$minor) = @_;
-    my ($result,%addtocache);
-    my $yesterday = time - 24*3600; 
-    if (ref($homecourses) eq 'HASH') {
-        my (%okcourses,%courseinfo,%recent);
-        my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
-        if ($hashref) {
-            while (my ($key,$value) = each(%$hashref)) {
-                my $unesc_key = &unescape($key);
-                if ($unesc_key =~ /^lasttime:(\w+)$/) {
-                    my $cid = $1;
-                    $cid =~ s/_/:/;
-                    if ($value > $yesterday ) {
-                        $recent{$cid} = 1;
-                    }
-                    next;
-                }
-                my $items = &Apache::lonnet::thaw_unescape($value);
-                if (ref($items) eq 'HASH') {
-                    my $hashid = $unesc_key;
-                    $hashid =~ s/_/:/;
-                    $courseinfo{$hashid} = $items;
-                    if (ref($homecourses->{$hashid}) eq 'ARRAY') {
-                        my ($reqdmajor,$reqdminor) = split(/\./,$items->{'releaserequired'});
-                        if (&useable_role($reqdmajor,$reqdminor,$major,$minor)) {
-                            $okcourses{$hashid} = 1;
-                        }
-                    }
-                }
-            }
-            unless (&untie_domain_hash($hashref)) {
-                &logthis('Failed to untie tied hash for nohist_courseids.db');
-            }
-        } else {
-            &logthis('Failed to tie hash for nohist_courseids.db');
-            return;
-        }
-        foreach my $hashid (keys(%recent)) {
-            my ($result,$cached)=&Apache::lonnet::is_cached_new('courseinfo',$hashid);
-            unless ($cached) {
-                &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
-            }
-        }
-        foreach my $hashid (keys(%{$homecourses})) {
-            next if ($recent{$hashid});
-            &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
-        }
-        foreach my $hashid (keys(%okcourses)) {
-            if (ref($homecourses->{$hashid}) eq 'ARRAY') {
-                foreach my $role (@{$homecourses->{$hashid}}) {
-                    if (ref($role) eq 'HASH') {
-                        while (my ($key,$value) = each(%{$role})) {
-                            if ($regexp eq '.') {
-                                $count++;
-                                if (defined($range) && $count >= $end)   { last; }
-                                if (defined($range) && $count <  $start) { next; }
-                                $result.=$key.'='.$value.'&';
-                            } else {
-                                my $unescapeKey = &unescape($key);
-                                if (eval('$unescapeKey=~/$regexp/')) {
-                                    $count++;
-                                    if (defined($range) && $count >= $end)   { last; }
-                                    if (defined($range) && $count <  $start) { next; }
-                                    $result.="$key=$value&";
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-    return $result;
-}
-
-sub useable_role {
-    my ($reqdmajor,$reqdminor,$major,$minor) = @_; 
-    if ($reqdmajor ne '' && $reqdminor ne '') {
-        return if (($major eq '' && $minor eq '') ||
-                   ($major < $reqdmajor) ||
-                   (($major == $reqdmajor) && ($minor < $reqdminor)));
-    }
-    return 1;
-}
-
 sub distro_and_arch {
     return $dist.':'.$arch;
 }
@@ -7732,7 +8011,7 @@ Place in B<logs/lond.log>
 
 stores hash in namespace
 
-=item rolesputy
+=item rolesput
 
 put a role into a user's environment