#!/usr/bin/perl

use strict;

use warnings;

use DB_File;

use Net::LDAP;

use YAML;

open my $fp, "<", "/usr/local/etc/ssoinabox/webcreds.yml" or die "failed to open yaml";

my $config = YAML::LoadFile $fp;

close $fp;

# connect to LDAP

my $ldap = Net::LDAP->new($config->{'ldap_server'})

	or die "Failed to connect to LDAP: $!";

$ldap->bind($config->{'ldap_manager'}->{'dn'}, password => $config->{'ldap_manager'}->{'password'})

	or die "Failed to bind to LDAP: $!";

# search for POSIX groups

my $lr = $ldap->search(

		base => $config->{'LDAP_BASEDN'}

		, filter => '(objectClass=posixGroup)'

	);

die "Failed to search LDAP..." if ( $lr->code );

# Fetch each group from LDAP...

my %users;

foreach my $entry ($lr->entries)

{

	my $groupname = $entry->get_value('cn');

	my $attrs = $entry->get_value('memberUID', asref => 1);

	foreach my $member (@$attrs)

	{

		# Make this a user-based map, as that is what the DBM uses.

		$users{$member} = [] if !defined($users{$member});

		push @{$users{$member}}, $groupname;

	}

}

# We're done with LDAP

$ldap->unbind;

# Prepare to write database file

my $dbm_file = "/etc/apache2/ldap-groups";

my %dbm_hash;

my ($key, $value);

# Open database file

tie %dbm_hash, "DB_File", $dbm_file, O_WRONLY or

	die "Unable to open DBM file $dbm_file: $!";

# write everything out

while ( ($key, $value) = each(%users) )

{

	$dbm_hash{$key} = sprintf('*:%s', join(',', @{$users{$key}}));

}

# Save and close database

untie %dbm_hash;

exit 0;

# debug - for viewing contents of the map

tie %dbm_hash, "DB_File", $dbm_file, O_RDONLY or

	die "Unable to open DBM file $dbm_file: $!";

while ( ($key, $value) = each(%dbm_hash) )

{

	print "$key => $value\n";

}