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#!/usr/bin/perl
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# 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.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2007 Vyatta, Inc.
# All Rights Reserved.
#
# **** End License ****
use strict;
use lib "/opt/vyatta/share/perl5";
use VyattaConfig;
# handle "user"
my $uconfig = new VyattaConfig;
$uconfig->setLevel("system login user");
my %users = $uconfig->listNodeStatus();
my @user_keys = sort keys %users;
if ( ( scalar(@user_keys) <= 0 )
|| !( grep /^root$/, @user_keys )
|| ( $users{'root'} eq 'deleted' ) )
{
# root is deleted
print STDERR "User \"root\" cannot be deleted\n";
exit 1;
}
# Exit codes form useradd.8 man page
my %reasons = (
0 => 'success',
1 => 'can´t update password file',
2 => 'invalid command syntax',
3 => 'invalid argument to option',
4 => 'UID already in use (and no -o)',
6 => 'specified group doesn´t exist',
9 => 'username already in use',
10 => 'can´t update group file',
12 => 'can´t create home directory',
13 => 'can´t create mail spool',
);
# Map of level to additional groups
my %level_map = (
'admin' => [ 'quaggavty', 'vyattacfg', 'sudo', 'adm', ],
'operator' => [ 'quaggavty', 'operator', 'adm', ],
);
# we have some users
for my $user (@user_keys) {
if ( $users{$user} eq 'deleted' ) {
system("sudo userdel -r '$user'");
die "userdel failed\n" if ( $? >> 8 );
}
elsif ( $users{$user} eq 'added' || $users{$user} eq 'changed' ) {
$uconfig->setLevel("system login user $user");
# See if this is a modification of existing account
my (undef, undef, $uid, undef, undef,
undef, undef, undef, $shell, undef) = getpwnam($user);
my $cmd;
# not found in existing passwd, must be new
if ( !defined $uid ) {
$cmd = 'useradd -s /bin/vbash -m';
}
# TODO Add checks for attempts to put system users
# in configuration file
# TODO Check if nothing changed and just skip
else {
$cmd = "usermod";
}
my $pwd = $uconfig->returnValue('authentication encrypted-password');
$pwd or die 'encrypted password not set';
$cmd .= " -p '$pwd'";
my $fname = $uconfig->returnValue('full-name');
$cmd .= " -c \"$fname\"" if ( defined $fname );
my $home = $uconfig->returnValue('home-directory');
$cmd .= " -d \"$home\"" if ( defined $home );
# map level to group membership
my $level = $uconfig->returnValue('level');
my $gref = $level_map{$level};
my @groups = @{$gref};
# add any additional groups from configuration
push( @groups, $uconfig->returnValues('group') );
$cmd .= ' -G ' . join( ',', @groups );
system("sudo $cmd $user");
if ( $? == -1 ) {
die "failed to exec $cmd";
}
elsif ( $? & 127 ) {
die "$cmd died with signal" . ( $? & 127 );
}
elsif ( $? != 0 ) {
my $reason = $reasons{ $? >> 8 };
die "$cmd failed: $reason\n";
}
}
}
my $PAM_RAD_CFG = '/etc/pam_radius_auth.conf';
my $PAM_RAD_BEGIN = '# BEGIN Vyatta Radius servers';
my $PAM_RAD_END = '# END Vyatta Radius servers';
sub is_pam_radius_present {
if ( !open( AUTH, '/etc/pam.d/common-auth' ) ) {
print STDERR "Cannot open /etc/pam.d/common-auth\n";
exit 1;
}
my $present = 0;
while (<AUTH>) {
if (/\ssufficient\spam_radius_auth\.so$/) {
$present = 1;
last;
}
}
close AUTH;
return $present;
}
sub remove_pam_radius {
return 1 if ( !is_pam_radius_present() );
my $cmd =
'sudo sh -c "'
. 'sed -i \'/\tsufficient\tpam_radius_auth\.so$/d;'
. '/\tpam_unix\.so /{s/ use_first_pass$//}\' '
. '/etc/pam.d/common-auth && '
. 'sed -i \'/\tsufficient\tpam_radius_auth\.so$/d\' '
. '/etc/pam.d/common-account"';
system($cmd);
return 0 if ( $? >> 8 );
return 1;
}
sub add_pam_radius {
return 1 if ( is_pam_radius_present() );
my $cmd =
'sudo sh -c "'
. 'sed -i \'s/^\(auth\trequired\tpam_unix\.so.*\)$'
. '/auth\tsufficient\tpam_radius_auth.so\n\1 use_first_pass/\' '
. '/etc/pam.d/common-auth && '
. 'sed -i \'s/^\(account\trequired\tpam_unix\.so.*\)$'
. '/account\tsufficient\tpam_radius_auth.so\n\1/\' '
. '/etc/pam.d/common-account"';
system($cmd);
return 0 if ( $? >> 8 );
return 1;
}
sub remove_radius_servers {
system( "sudo sed -i '/^$PAM_RAD_BEGIN\$/,/^$PAM_RAD_END\$/{d}' "
. "$PAM_RAD_CFG" );
return 0 if ( $? >> 8 );
return 1;
}
sub add_radius_servers {
my $str = shift;
system( "sudo sh -c \""
. "echo '$PAM_RAD_BEGIN\n$str$PAM_RAD_END\n' >> $PAM_RAD_CFG\"" );
return 0 if ( $? >> 8 );
return 1;
}
# handle "radius-server"
my $rconfig = new VyattaConfig;
$rconfig->setLevel("system login radius-server");
my %servers = $rconfig->listNodeStatus();
my @server_keys = sort keys %servers;
if ( scalar(@server_keys) <= 0 ) {
# all radius servers deleted
exit 1 if ( !remove_pam_radius() );
exit 0;
}
# we have some servers
my $all_deleted = 1;
my $server_str = '';
remove_radius_servers();
for my $server (@server_keys) {
if ( $servers{$server} ne 'deleted' ) {
$all_deleted = 0;
my $port = $rconfig->returnValue("$server port");
my $secret = $rconfig->returnValue("$server secret");
my $timeout = $rconfig->returnValue("$server timeout");
$server_str .= "$server:$port\t$secret\t$timeout\n";
}
}
if ($all_deleted) {
# all radius servers deleted
exit 1 if ( !remove_pam_radius() );
}
else {
exit 1 if ( !add_radius_servers($server_str) );
exit 1 if ( !add_pam_radius() );
}
exit 0;
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