summaryrefslogtreecommitdiffstats
path: root/perl-install/security/msec.pm
blob: 791ad8ef0b22977fee2fd8bbdc4e8fef258cdc8e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
package security::msec;

use strict;
use MDK::Common::File;
use MDK::Common;


#-------------------------------------------------------------
# msec options managment methods


#-------------------------------------------------------------
# option defaults

sub load_defaults {
    my ($msec, $category) = @_;
    my $separator = $msec->{$category}{def_separator};
    map { 
        my ($opt, $val) = split(/$separator/, $_, 2);
        chop $val;
        if_($opt ne 'set_security_conf', $opt => $val);
    } cat_($msec->{$category}{defaults_file}), if_($category eq "checks", 'MAIL_USER');
}


# get_XXX_default(function) -
#   return the default of the function|check passed in argument.

sub get_check_default {
    my ($msec, $check) = @_;
    $msec->{checks}{default}{$check};
}

sub get_function_default {
    my ($msec, $function) = @_;
    $msec->{functions}{default}{$function};
}



#-------------------------------------------------------------
# option values

sub load_values {
    my ($msec, $category) = @_;
    my $separator = $msec->{$category}{val_separator};
    map {
        my ($opt, $val) = split /$separator/;
        chop $val;
        $val =~ s/[()]//g;
        chop $opt if $separator eq '\(';  # $opt =~ s/ //g if $separator eq '\(';
        if_($val, $opt => $val);
    } cat_($msec->{$category}{values_file});
}


# get_XXX_value(check|function) -
#   return the value of the function|check passed in argument.
#   If no value is set, return "default".

sub get_function_value {
    my ($msec, $function) = @_;
    $msec->{functions}{value}{$function} || "default";
}

sub get_check_value {
    my ($msec, $check) = @_;
    $msec->{checks}{value}{$check} || "default";
}



#-------------------------------------------------------------
# get list of check|functions

# list_(functions|checks) -
#   return a list of functions|checks handled by level.local|security.conf

sub raw_checks_list {
    my ($msec) = @_;
    keys %{$msec->{checks}{default}};
}

sub list_checks {
    my ($msec) = @_;
    grep { !member($_, qw(MAIL_WARN MAIL_USER)) } $msec->raw_checks_list;
}

sub list_functions {
    my ($msec, $category) = @_;

    ## 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)]);

    # get all function names; filter out those which are in the ignore
    # list, return what lefts.
    grep { !member($_, @ignore_list) && member($_, @{$options{$category}}) } keys %{$msec->{functions}{default}};
}


#-------------------------------------------------------------
# set back checks|functions values

sub set_function {
    my ($msec, $function, $value) = @_;
    $msec->{functions}{value}{$function} = $value;
}

sub set_check {
    my ($msec, $check, $value) = @_;
    $msec->{checks}{value}{$check} = $value;
}


#-------------------------------------------------------------
# apply configuration

# config_(check|function)(check|function, value) -
#   Apply the configuration to 'prefix'/etc/security/msec/security.conf||/etc/security/msec/level.local

sub apply_functions {
    my ($msec) = @_;
    my @list = sort($msec->list_functions('system'), $msec->list_functions('network'));
    substInFile {
        foreach my $function (@list) { s/^$function.*\n// }
        if (eof) {
            $_ .= join("\n", if_(!$_, ''), (map { 
                my $value = $msec->get_function_value($_);
                if_($value ne 'default', "$_ ($value)");
            } @list), "");
        }
    } $msec->{functions}{values_file};
}

sub apply_checks {
    my ($msec) = @_;
    my @list =  sort $msec->raw_checks_list;
    substInFile {
        foreach my $check (@list) { s/^$check.*\n// }
        if (eof) {
            print "\n", join("\n", map { 
                my $value = $msec->get_check_value($_);
                if_($value ne 'default', $_ . '=' . $value);
            } @list), "\n";
        }
    } $msec->{checks}{values_file};
}

sub reload {
    my ($msec) = @_;
    my $num_level = 0;
    require security::level;
    $num_level ||= security::level::get();
    $msec->{functions}{defaults_file} = "$::prefix/usr/share/msec/level.".$num_level;
    $msec->{functions}{default} = { $msec->load_defaults('functions') };
}

sub new { 
    my $type = shift;
    my $msec = bless {}, $type;

    $msec->{functions}{values_file}   = "$::prefix/etc/security/msec/level.local";
    $msec->{checks}{values_file}      = "$::prefix/etc/security/msec/security.conf";
    $msec->{checks}{defaults_file}    = "$::prefix/var/lib/msec/security.conf";
    $msec->{checks}{val_separator}    = '=';
    $msec->{functions}{val_separator} = '\(';
    $msec->{checks}{def_separator}    = '=';
    $msec->{functions}{def_separator} = ' ';
    $msec->reload;

    $msec->{checks}{default}    = { $msec->load_defaults('checks') };
    $msec->{functions}{value}   = { $msec->load_values('functions') };
    $msec->{checks}{value}      = { $msec->load_values('checks') };
    $msec;
}

1;