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package security::msec;
use strict;
use vars qw($VERSION);
use MDK::Common::File;
$VERSION = "0.2";
=head1 NAME
msec - Perl functions to handle msec configuration files
=head1 SYNOPSYS
#!/usr/bin/perl
use strict;
use lib qw(/usr/lib/libDrakX);
require security::msec;
my $msec = new security::msec;
my (%options, %defaults);
my @functions = $msec->get_functions();
foreach (@functions) { $options{$_} = $msec->get_function_value($_) }
foreach (@functions) { $defaults{$_} = $msec->get_function_default($_) }
foreach (@functions) { $msec->config_function($_, $options{$_}) }
my @checks = $msec->get_default_checks;
foreach (@checks) { $options{$_} = $msec->get_check_value($_) }
foreach (@checks) { $defaults{$_} = $msec->get_check_default($_) }
foreach (@checks) { $msec->config_check($_, $options{$_}) }
=head1 DESCRIPTION
C<msec> is a perl module used by draksec to customize the different options
that can be set in msec's configuration files.
=head1 COPYRIGHT
Copyright (C) 2000-2002 MandrakeSoft <tvignaud@mandrakesoft.com>
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, 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.
=cut
use MDK::Common;
my $check_file = "$::prefix/etc/security/msec/security.conf";
# ***********************************************
# PRIVATE FUNCTIONS
# ***********************************************
my $num_level;
sub get_default {
my ($option, $category) = @_;
my $default_file = "";
my $default_value = "";
my $num_level = 0;
if ($category eq "functions") {
require security::level;
$num_level ||= security::level::get();
$default_file = "$::prefix/usr/share/msec/level.".$num_level;
}
elsif ($category eq "checks") { $default_file = "$::prefix/var/lib/msec/security.conf" }
foreach (cat_($default_file)) {
if ($category eq 'functions') {
(undef, $default_value) = split(/ /, $_) if /^$option/;
} elsif ($category eq 'checks') {
(undef, $default_value) = split(/=/, $_) if /^$option/;
}
}
chop $default_value;
$default_value;
}
sub get_value {
my ($item, $category) = @_;
my $value = '';
my $item_file =
$category eq 'functions' ? "$::prefix/etc/security/msec/level.local" :
$category eq 'checks' ? $check_file : '';
foreach (cat_($item_file)) {
/^$item/ or next;
if ($category eq 'functions') {
my $i = $_;
(undef, $_) = split /\(/;
s/[()]//g;
$value = $_;
$_ = $i;
} elsif ($category eq 'checks') {
(undef, $value) = split(/=/, $_);
}
chop $value;
return $value;
}
"default";
}
# ***********************************************
# SPECIFIC OPTIONS
# ***********************************************
# ***********************************************
# FUNCTIONS (level.local) RELATED
# ***********************************************
# get_functions() -
# return a list of functions handled by level.local (see
# man mseclib for more info).
sub get_functions {
shift;
my ($category) = @_;
my (@functions, @tmp_network_list, @tmp_system_list);
## TODO handle 3 last functions here so they can be removed from this list
my @ignore_list = qw(indirect commit_changes closelog error initlog log set_secure_level
set_security_conf set_server_level print_changes get_translation create_server_link);
my %options = (
'network' => [qw(accept_bogus_error_responses accept_broadcasted_icmp_echo accept_icmp_echo
enable_dns_spoofing_protection enable_ip_spoofing_protection
enable_log_strange_packets enable_promisc_check no_password_aging_for)],
'system' => [qw(allow_autologin allow_issues allow_reboot allow_remote_root_login
allow_root_login allow_user_list allow_x_connections allow_xserver_to_listen
authorize_services enable_at_crontab enable_console_log
enable_msec_cron enable_pam_wheel_for_su enable_password enable_security_check
enable_sulogin password_aging password_history password_length set_root_umask
set_shell_history_size set_shell_timeout set_user_umask)]);
my $file = "$::prefix/usr/share/msec/mseclib.py";
my $function;
# read mseclib.py to get each function's name and if it's
# not in the ignore list, add it to the returned list.
foreach (cat_($file)) {
if (/^def/) {
(undef, $function) = split(/ /, $_);
($function, undef) = split(/\(/, $function);
if (!member($function, @ignore_list) && member($function, @{$options{$category}})) {
push(@functions, $function)
}
}
}
@functions;
}
# get_function_value(function) -
# return the value of the function passed in argument. If no value is set,
# return "default".
sub get_function_value {
shift;
get_value(@_, 'functions');
}
# get_function_default(function) -
# return the default value of the function according to the security level
sub get_function_default {
shift;
return get_default(@_, "functions");
}
# config_function(function, value) -
# Apply the configuration to 'prefix'/etc/security/msec/level.local
sub config_function {
shift;
my ($function, $value) = @_;
my $options_file = "$::prefix/etc/security/msec/level.local";
substInFile { s/^$function.*\n// } $options_file;
append_to_file($options_file, "$function ($value)") if $value ne 'default';
}
# ***********************************************
# PERIODIC CHECKS (security.conf) RELATED
# ***********************************************
# get_default_checks() -
# return a list of periodic checks handled by security.conf
sub get_default_checks {
map { if(/(.*?)=/, $1) } cat_("$::prefix/var/lib/msec/security.conf");
}
# get_check_value(check)
# return the value of the check passed in argument
sub get_check_value {
shift;
get_value(@_, 'checks');
}
# get_check_default(check)
# Get the default value according to the security level
sub get_check_default {
my ($check) = @_;
return get_default($check, 'checks');
}
# config_check(check, value)
# Apply the configuration to "$::prefix"/etc/security/msec/security.conf
sub config_check {
my (undef, $check, $value) = @_;
if ($value eq 'default') {
substInFile { s/^$check.*\n// } $check_file;
} else {
setVarsInSh($check_file, { $check => $value });
}
}
sub new { shift }
1;
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