#! /usr/bin/perl

# $Id$
#
#  This code is part of LDAP Account Manager (http://www.sourceforge.net/projects/lam)
#  Copyright (C) 2003  Tilo Lutz
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#
#  LDAP Account Manager daemon to create and delete homedirecotries and quotas
######################################################
# Configure-Options
# change only variables starting from here
	# list of valid admins
@admins = ('cn=Manager,dc=my-domain,dc=com',
	    'uid=test,ou=people,dc=my-domain,dc=com');
$server_ldap="127.0.0.1"; # IP or DNS of ldap-server
$server_ssh="127.0.0.1"; # IP or DNS of host to create homedirs, quota, ....
$server_ssh_ident = "/var/lib/wwwrun/.ssh/id_dsa"; # SSH-Key to use
$path = "/srv/www/htdocs/lam/lib/lamdaemon.pl"; # path to ldap on remote-host
$server_ldap_port='389'; # Port used from ldap
$server_tls='no'; # Use TLS?
$server_tls_verify='require'; # none,optional or require a valid server certificated
$server_tls_clientcert=''; # path to client certificate
$server_tls_clientkey=''; # path to client certificate
$server_tls_decryptkey=''; # To to decrypt clientkey
$server_tls_cafile='/etc/certificates/ca.cert'; # Path to CA-File
$debug=true; # Show debug messages

# Don't change anything below this line
############################################################


use Quota; # Needed to get and set quotas
use Net::LDAP; # Needed to connect to ldap-server
#use strict; # Use strict for security reasons

@quota_grp;
@quota_usr; # Filesystems with enabled userquotas
@vals = @ARGV;
	# vals = DN, PAssword, user, home, (add|rem),
	#                            quota, (set|get),(u|g), (mountpoint,blocksoft,blockhard,filesoft,filehard)+
	#                            chown  options
$|=1; # Disable buffering

sub get_fs { # Load mountpoints from mtab if enabled quotas
	Quota::setmntent();
	my $i=0;
	my @args;
	while (my @temp = Quota::getmntent()) {
		$args[$i][0] = $temp[0];
		$args[$i][1] = $temp[1];
		$args[$i][2] = $temp[2];
		$args[$i][3] = $temp[3];
		$i++;
		}
	Quota::endmntent();
	my $j=0; my $k=0; $i=0;
	while ($args[$i][0]) {
		if ( $args[$i][3] =~ m/usrquota/ ) {
			$quota_usr[$j][0] = $args[$i][0];
			$quota_usr[$j][1] = $args[$i][1];
			$quota_usr[$j][2] = $args[$i][2];
			$quota_usr[$j][3] = $args[$i][3];
			$j++;
			}
		if ( $args[$i][3] =~ m/grpquota/ ) {
			$quota_grp[$k][0] = $args[$i][0];
			$quota_grp[$k][1] = $args[$i][1];
			$quota_grp[$k][2] = $args[$i][2];
			$quota_grp[$k][3] = $args[$i][3];
			$k++;
			}
		$i++;
		}
	}

# ***************** Check values



if ($( == 0 ) {
# Drop root Previleges
($<, $>) = ($>, $<);
foreach my $admin (@admins) { # Check if user is admin
	if ($admin eq $vals[0]) { $found=true; }
	}
if ($found==true) {
	# Connect to ldap-server and check if password is valid.
	$ldap = Net::LDAP->new($server_ldap, port => $server_ldap_port, version => 3) or die ('Can\'t connect to ldapserver.');
	if ($server_tls eq 'yes') {
	    $mesg = $ldap->start_tls(
		verify => $server_tls_verify,
		clientcert => $server_tls_clientcert,
		clientkey => $server_tls_clientkey,
		decrypte => sub { $server_tls_decryptkey; },
		cafile => $server_tls_cafile);
	    }
	$result = $ldap->bind (dn => $vals[0], password => $vals[1]) ;
	$ldap->unbind(); # Close ldap connection.
	if (!$result->code) { # password is valid
		switch: {
			# Get user information
			if (($vals[5] eq 'u') || ($vals[3] eq 'home')) { @user = getpwnam($vals[2]); }
				else { @user = getgrnam($vals[2]); }
			$vals[3] eq 'home' && do {
				switch2: {
					$vals[4] eq 'add' && do {
						# split homedir to set all directories below the last dir. to 755
						my $path = $user[7];
						$path =~ s,/(?:[^/]*)$,,;
						($<, $>) = ($>, $<); # Get root privileges
						if (! -e $path) {
    						    system 'mkdir', '-m 755', '-p', $path; # Create paths to homedir
						    }
						if (! -e $user[7]) {
						    system 'mkdir', '-m 755', $user[7]; # Create himdir itself
						    system "cp -a /etc/skel/* /etc/skel/.[^.]* $user[7]"; # Copy /etc/sekl into homedir
					    	    system 'chown', '-R', "$user[2]:$user[3]" , $user[7]; # Change owner to new user
						    system '/usr/sbin/useradd.local', $user[0]; # run useradd-script
						    }
						($<, $>) = ($>, $<); # Give up root previleges
						last switch2;
						};
					$vals[4] eq 'rem' && do {
						($<, $>) = ($>, $<); # Get root previliges
						if (-d $user[7]) {
						    system 'rm', '-R', $user[7]; # Delete Homedirectory
						    system '/usr/sbin/userdel.local', $user[0];
						    }
						($<, $>) = ($>, $<); # Give up root previleges
						last switch2;
						};
					}
				last switch;
				};
			$vals[3] eq 'quota' && do {
				get_fs(); # Load list of devices with enabled quotas
					# Store quota information in array
				@quota_temp1 = split (':', $vals[6]);
				$group=0;
				$i=0;
				while ($quota_temp1[$i]) {
					$j=0;
					@temp = split (',', $quota_temp1[$i]);
					while ($temp[$j]) {
						$quota[$i][$j] = $temp[$j];
						$j++;
						}
					$i++;
					}
				if ($vals[5] eq 'u') { $group=false; } else {
				    $group=1;
				    @quota_usr = @quota_grp;
				    }
				switch2: {
					$vals[4] eq 'rem' && do {
						$i=0;
						($<, $>) = ($>, $<); # Get root privileges
						while ($quota_usr[$i][0]) {
							$dev = Quota::getqcarg($quota_usr[$i][1]);
							$return = Quota::setqlim($dev,$user[2],0,0,0,0,1,$group);
							$i++;
							}
						($<, $>) = ($>, $<); # Give up root previleges
						last switch2;
						};
					$vals[4] eq 'set' && do {
						$i=0;
						($<, $>) = ($>, $<); # Get root privileges
						while ($quota_usr[$i][0]) {
							$dev = Quota::getqcarg($quota[$i][0]);
							$return = Quota::setqlim($dev,$user[2],$quota[$i][1],$quota[$i][2],$quota[$i][3],$quota[$i][4],1,$group);
							$i++;
							}
						($<, $>) = ($>, $<); # Give up root previleges
						last switch2;
						};
					$vals[4] eq 'get' && do {
						$i=0;
						($<, $>) = ($>, $<); # Get root privileges
						while ($quota_usr[$i][0]) {
							if ($vals[2]ne'+') {
								$dev = Quota::getqcarg($quota_usr[$i][1]);
								@temp = Quota::query($dev,$user[2],$group);
								if ($temp[0]ne'') {
    								    $return = "$quota_usr[$i][1],$temp[0],$temp[1],$temp[2],$temp[3],$temp[4],$temp[5],$temp[6],$temp[7]:$return";
								    }
								else { $return = "$quota_usr[$i][1],0,0,0,0,0,0,0,0:$return"; }
								}
							else { $return = "$quota_usr[$i][1],0,0,0,0,0,0,0,0:$return"; }
							$i++;
							}
						($<, $>) = ($>, $<); # Give up root previleges
						last switch2;
						};
					}
				last switch;
				};
			}
		}
	else { $return = "Invalid Password"; }
	}
else { $return = "Invalid User"; }
print "$return\n";
}
else {
    use Net::SSH::Perl;
    @username = split (',', $vals[0]);
    $username[0] =~ s/uid=//;
    my $ssh = Net::SSH::Perl->new($server_ssh, options=>[
	"IdentityFile $server_ssh_ident",
	"UserKnownHostsFile /dev/null"
	]);
    $ssh->login($username[0], $vals[1]);
    ($stdout, $stderr, $exit) = $ssh->cmd("sudo $path @ARGV");
    print "$stdout";
    }