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 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 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" } local *F; open F, $default_file; local $_; while () { if ($category eq 'functions') { (undef, $default_value) = split(/ /, $_) if /^$option/; } elsif ($category eq 'checks') { (undef, $default_value) = split(/=/, $_) if /^$option/; } } close F; chop $default_value; $default_value; } sub get_value { my ($item, $category) = @_; my $value = ''; my $found = 0; my $item_file; $item_file = "$::prefix/etc/security/msec/level.local" if $category eq 'functions'; $item_file = $check_file if $category eq 'checks'; if (-e $item_file) { local *F; open F, $item_file; local $_; while () { if (/^$item/) { if ($category eq 'functions') { my $i = $_; (undef, $_) = split /\(/; tr/()//d; $value = $_; $_ = $i; } elsif ($category eq 'checks') { (undef, $value) = split(/=/, $_); } chop $value; $found = 1; close F; } } close F; $value = "default" if $found == 0; } else { $value = "default" } $value; } # *********************************************** # SPECIFIC OPTIONS # *********************************************** # *********************************************** # FUNCTIONS (level.local) RELATED # *********************************************** # get_functions() - # return a list of functions handled by level.local (see # man mseclib for more info). sub get_functions { shift; my ($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. local *F; open F, $file; local $_; while () { if (/^def/) { (undef, $function) = split(/ /, $_); ($function, undef) = split(/\(/, $function); if (!member($function, @ignore_list) && member($function, @{$options{$category}})) { push(@functions, $function) } } } close F; @functions; } # get_function_value(function) - # return the value of the function passed in argument. If no value is set, # return "default". sub get_function_value { shift; get_value(@_, 'functions'); } # get_function_default(function) - # return the default value of the function according to the security level sub get_function_default { shift; return get_default(@_, "functions"); } # config_function(function, value) - # Apply the configuration to 'prefix'/etc/security/msec/level.local sub config_function { shift; my ($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 $value ne 'default'; } # *********************************************** # PERIODIC CHECKS (security.conf) RELATED # *********************************************** # get_default_checks() - # return a list of periodic checks handled by security.conf sub get_default_checks { my ($check, @checks); my $check_file = "$::prefix/var/lib/msec/security.conf"; if (-e $check_file) { local *F; open F, $check_file; local $_; while () { ($check, undef) = split(/=/, $_); push @checks, $check unless member($check, qw(MAIL_USER)) } close F; } @checks; } # 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;