/
install.pl
executable file
·2281 lines (2044 loc) · 76.9 KB
/
install.pl
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#!/usr/bin/perl -w
#
#########################################################################
#
# File: install.pl
#
# Purpose: install.pl is the installation script for psad. It is safe
# to execute install.pl even if psad has already been installed
# on a system since install.pl will preserve the existing
# config section.
#
# Credits: (see the CREDITS file)
#
# Copyright (C) 1999-2018 Michael Rash (mbr@cipherdyne.org)
#
# License (GNU Public License):
#
# 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
#
# TODO:
#
#########################################################################
#
use Cwd;
use File::Path;
use File::Copy;
use Sys::Hostname;
use IO::Socket;
use Getopt::Long;
use strict;
#============== config ===============
my $USRSBIN_DIR = '/usr/sbin'; ### consistent with FHS (Filesystem
### Hierarchy Standard)
my $USRBIN_DIR = '/usr/bin'; ### consistent with FHS
my $psad_conf_file = 'psad.conf';
### system binaries ###
my $chkconfigCmd = '/sbin/chkconfig';
my $rcupdateCmd = '/sbin/rc-update'; ### Gentoo
my $updatercdCmd = '/usr/sbin/update-rc.d'; ### Ubuntu
my $makeCmd = '/usr/bin/make';
my $perlCmd = '/usr/bin/perl';
my $wgetCmd = '/usr/bin/wget';
my $runlevelCmd = '/sbin/runlevel';
my $systemctlCmd = '/bin/systemctl';
my $install_root = '/';
my $answers_file = 'install.answers';
#============ end config ============
my %file_vars = (
'signatures' => 'SIGS_FILE',
'auto_dl' => 'AUTO_DL_FILE',
'icmp_types' => 'ICMP_TYPES_FILE',
'icmp6_types' => 'ICMP6_TYPES_FILE',
'posf' => 'POSF_FILE',
'pf.os' => 'P0F_FILE',
'snort_rule_dl' => 'SNORT_RULE_DL_FILE',
'ip_options' => 'IP_OPTS_FILE',
'protocols' => 'PROTOCOLS_FILE'
);
my %exclude_cmds = (
'wget' => '',
'netstat' => '',
'mail' => '',
'sendmail' => '',
'uname' => '',
'df' => '',
'psadwatchd' => '',
'kmsgsd' => '',
'psad' => '',
'whois' => '',
'fwcheck_psad' => ''
);
### map perl modules to versions
my %required_perl_modules = (
'Unix::Syslog' => {
'force-install' => 0,
'mod-dir' => 'Unix-Syslog'
},
'Bit::Vector' => {
'force-install' => 0,
'mod-dir' => 'Bit-Vector'
},
'Storable', => {
'force-install' => 0,
'mod-dir' => 'Storable'
},
'Carp::Clan', => {
'force-install' => 0,
'mod-dir' => 'Carp-Clan'
},
'Date::Calc', => {
'force-install' => 0,
'mod-dir' => 'Date-Calc'
},
'NetAddr::IP' => {
'force-install' => 0,
'mod-dir' => 'NetAddr-IP'
},
'IPTables::Parse' => {
'force-install' => 1,
'mod-dir' => 'IPTables-Parse'
},
'IPTables::ChainMgr' => {
'force-install' => 1,
'mod-dir' => 'IPTables-ChainMgr'
},
);
my @ordered_modules = (qw/
Unix::Syslog
Bit::Vector
Storable
Carp::Clan
Date::Calc
NetAddr::IP
IPTables::Parse
IPTables::ChainMgr
/);
my %config = ();
my %cmds = ();
my @cmd_search_paths = qw(
/bin
/sbin
/usr/bin
/usr/sbin
/usr/local/bin
/usr/local/sbin
);
### IP regex
my $ip_re = qr|(?:[0-2]?\d{1,2}\.){3}[0-2]?\d{1,2}|;
### get the hostname of the system
my $HOSTNAME = hostname();
my $src_dir = getcwd() or die "[*] Could not get current working directory.";
### for user answers
my $ACCEPT_YES_DEFAULT = 1;
my $ACCEPT_NO_DEFAULT = 2;
my $NO_ANS_DEFAULT = 0;
### set the default execution flags and command line args
my $noarchive = 0;
my $uninstall = 0;
my $help = 0;
my $archived_old = 0;
my $use_answers = 0;
my $no_write_answers = 0;
my %answers = ();
my $skip_module_install = 0;
my $cmdline_force_install = 0;
my $force_path_update = 0;
my $force_mod_re = '';
my $exclude_mod_re = '';
my $install_test_dir = 0;
my $no_rm_old_lib_dir = 0;
my $syslog_conf = '';
my $locale = 'C'; ### default LC_ALL env variable
my $no_locale = 0;
my $deps_dir = 'deps';
my $init_dir = '/etc/init.d';
my $systemd_init_dir = '/lib/systemd/system';
my $init_name = 'psad';
my $systemd_init_name = 'psad.service';
my $install_syslog_fifo = 0;
my $runlevel = -1;
my @installation_lines = ();
### make Getopts case sensitive
Getopt::Long::Configure('no_ignore_case');
&usage(1) unless (GetOptions(
'config=s' => \$psad_conf_file, ### specify path to psad.conf
'force-mod-install' => \$cmdline_force_install, ### force install of all modules
'Force-mod-regex=s' => \$force_mod_re, ### force specific mod install with regex
'Exclude-mod-regex=s' => \$exclude_mod_re, ### exclude a particular perl module
'path-update' => \$force_path_update, ### update command paths
'Skip-mod-install' => \$skip_module_install,
'Use-answers' => \$use_answers,
'answers-file=s' => \$answers_file,
'no-write-answers' => \$no_write_answers,
'no-rm-lib-dir' => \$no_rm_old_lib_dir, ### remove any old /usr/lib/psad dir
'no-preserve' => \$noarchive, ### Don't preserve existing configs.
'syslog-conf=s' => \$syslog_conf, ### specify path to syslog config file.
'uninstall' => \$uninstall, ### Uninstall psad.
'init-dir=s' => \$init_dir,
'systemd-init-dir=s' => \$systemd_init_dir,
'init-name=s' => \$init_name,
'install-syslog-fifo' => \$install_syslog_fifo,
'install-root=s' => \$install_root,
'install-test-dir' => \$install_test_dir,
'runlevel=i' => \$runlevel,
'LC_ALL=s' => \$locale,
'no-LC_ALL' => \$no_locale,
'help' => \$help ### Display help.
));
&usage(0) if $help;
### set LC_ALL env variable
$ENV{'LC_ALL'} = $locale unless $no_locale;
### make a copy of the original psad.conf file and restore at the end
copy $psad_conf_file, "${psad_conf_file}.orig" or die "[*] Could not ",
"copy $psad_conf_file -> $psad_conf_file.orig";
if ($install_test_dir) {
$install_root = getcwd() . '/test/psad-install';
$init_dir = $install_root . '/etc/init.d';
}
&import_answers() if $use_answers;
### import paths from default psad.conf
&import_config();
$force_mod_re = qr|$force_mod_re| if $force_mod_re;
$exclude_mod_re = qr|$exclude_mod_re| if $exclude_mod_re;
### see if the deps/ directory exists, and if not then we are installing
### from the -nodeps sources so don't install any perl modules
$skip_module_install = 1 unless -d $deps_dir;
$cmds{'make'} = $makeCmd;
$cmds{'perl'} = $perlCmd;
$cmds{'runlevel'} = $runlevelCmd;
my $distro = &get_distro();
### handle systems with systemd
my $is_systemd = &look_for_process(qr|/systemd|);
if ($is_systemd) {
$init_dir = $systemd_init_dir;
$init_name = $systemd_init_name;
$cmds{'systemctl'} = $systemctlCmd;
die "[*] systemd init directory $init_dir does not exist, ",
"use --systemd-init-dir <path>" unless -d $init_dir;
} else {
if ($distro eq 'redhat' or $distro eq 'fedora') {
### add chkconfig only if we are runing on a redhat distro
$cmds{'chkconfig'} = $chkconfigCmd;
} elsif ($distro eq 'gentoo') {
### add rc-update if we are running on a gentoo distro
$cmds{'rc-update'} = $rcupdateCmd;
} elsif ($distro eq 'ubuntu') {
### add update-rc.d if we are running on an ubuntu distro
$cmds{'update-rc.d'} = $updatercdCmd;
}
unless (-d $init_dir) {
if (-d '/etc/rc.d/init.d') {
$init_dir = '/etc/rc.d/init.d';
} elsif (-d '/etc/rc.d') { ### for Slackware
$init_dir = '/etc/rc.d';
} else {
die "[*] Cannot find the init script directory, use ",
"--init-dir <path>" unless $install_test_dir;
}
}
}
### need to make sure this exists before attempting to
### write anything to the install log.
&full_mkdir($config{'PSAD_DIR'}, 0700);
### make sure the system binaries are where we expect
### them to be.
&check_commands();
### occasionally things from old psad installations need to be
### dealt with separately.
&check_old_psad_installation();
if ($uninstall) {
&uninstall();
} else {
&install();
open F, "> $config{'INSTALL_LOG_FILE'}" or die $!;
print F for @installation_lines;
close F;
}
### restore the original psad.conf file (this is just the local one in the
### sources directory).
if (-e "${psad_conf_file}.orig") {
unlink $psad_conf_file if -e $psad_conf_file;
move "${psad_conf_file}.orig", $psad_conf_file;
}
exit 0;
#================= end main =================
sub install() {
### make sure install.pl is being called from the source directory
unless (-e 'psad') {
die "[*] install.pl can only be executed from the directory\n",
" that contains the psad sources! Exiting.";
}
&logr('[+] ' . localtime() . " Installing psad on hostname: $HOSTNAME\n");
### make sure another psad process is not running
if (&ask_to_stop_psad()) {
&stop_psad();
}
unless (-d $config{'PSAD_RUN_DIR'}) {
&logr("[+] Creating $config{'PSAD_RUN_DIR'}\n");
&full_mkdir($config{'PSAD_RUN_DIR'}, 0700);
}
unless (-d $config{'PSAD_FIFO_DIR'}) {
&logr("[+] Creating $config{'PSAD_FIFO_DIR'}\n");
&full_mkdir($config{'PSAD_FIFO_DIR'}, 0700);
}
### change any existing psad module directory to allow anyone to import
unless ($skip_module_install) {
my $dir_tmp = $config{'PSAD_LIBS_DIR'};
$dir_tmp =~ s|lib/|lib64/|;
for my $dir ($config{'PSAD_LIBS_DIR'}, $dir_tmp) {
if (-d $dir) {
chmod 0755, $dir;
unless ($no_rm_old_lib_dir) {
&logr("[+] Removing $dir/ directory from previous " .
"psad installation.\n");
rmtree $dir;
}
}
}
}
unless (-d $config{'PSAD_CONF_DIR'}) {
&logr("[+] Creating $config{'PSAD_CONF_DIR'}\n");
&full_mkdir($config{'PSAD_CONF_DIR'}, 0700);
}
unless (-d $config{'CONF_ARCHIVE_DIR'}) {
&logr("[+] Creating $config{'CONF_ARCHIVE_DIR'}\n");
&full_mkdir($config{'CONF_ARCHIVE_DIR'}, 0700);
}
if ($install_syslog_fifo) {
unless (-e $config{'PSAD_FIFO_FILE'}) {
&logr("[+] Creating named pipe $config{'PSAD_FIFO_FILE'}\n");
unless (&run_cmd("$cmds{'mknod'} -m 600 " .
"$config{'PSAD_FIFO_FILE'} p") == 0) {
&logr("[*] Could not create the named pipe " .
"\"$config{'PSAD_FIFO_FILE'}\"!\n" .
"[*] psad requires this file to exist! Aborting install.\n");
die;
}
unless (-p $config{'PSAD_FIFO_FILE'}) {
&logr("[*] Could not create the named pipe " .
"\"$config{'PSAD_FIFO_FILE'}\"!\n" .
"[*] psad requires this file to exist! Aborting " .
"install.\n");
die;
}
}
}
unless (-d $config{'PSAD_DIR'}) {
&logr("[+] Creating $config{'PSAD_DIR'}\n");
&full_mkdir($config{'PSAD_DIR'}, 0700);
}
unless (-d $config{'PSAD_TMP_DIR'}) {
&logr("[+] Creating $config{'PSAD_TMP_DIR'}\n");
&full_mkdir($config{'PSAD_TMP_DIR'}, 0700);
}
unless (-d $config{'PSAD_LIBS_DIR'}) {
&logr("[+] Creating $config{'PSAD_LIBS_DIR'}\n");
&full_mkdir($config{'PSAD_LIBS_DIR'}, 0755);
}
unless (-e $config{'FW_DATA_FILE'}) {
&logr("[+] Creating $config{'FW_DATA_FILE'} file\n");
open F, "> $config{'FW_DATA_FILE'}" or die "[*] Could not open ",
"$config{'FW_DATA_FILE'}: $!";
close F;
chmod 0600, "$config{'FW_DATA_FILE'}";
&perms_ownership("$config{'FW_DATA_FILE'}", 0600);
}
unless (-d $USRSBIN_DIR) {
&logr("[+] Creating $USRSBIN_DIR\n");
&full_mkdir($USRSBIN_DIR, 0755);
}
if (-d 'deps' and -d 'deps/whois') {
&logr("[+] Compiling Marco d'Itri's whois client\n");
&run_cmd("$cmds{'make'} -C deps/whois");
if (-e 'deps/whois/whois') {
### if an old whois process is still around ("text file
### busy" error), then it is ok to not be able to copy
### the new whois binary into place; the old one should
### work fine.
&logr("[+] Copying whois binary to $cmds{'whois'}\n");
copy 'deps/whois/whois', $cmds{'whois'};
die "[*] Could not copy deps/whois/whois -> $cmds{'whois'}: $!"
unless -e $cmds{'whois'};
} else {
die "[*] Could not compile whois";
}
}
&perms_ownership($cmds{'whois'}, 0755);
print "\n\n";
### install perl modules
unless ($skip_module_install) {
for my $module (@ordered_modules) {
&install_perl_module($module);
}
}
my $snort_dir = 'deps/snort_rules';
if (-d 'deps' and -d $snort_dir) {
&logr("[+] Installing Snort-2.3.3 signatures in " .
"$config{'SNORT_RULES_DIR'}\n");
unless (-d $config{'SNORT_RULES_DIR'}) {
&full_mkdir($config{'SNORT_RULES_DIR'}, 0700);
}
opendir D, $snort_dir or die "[*] Could not open ",
"the $snort_dir/ directory: $!";
my @files = readdir D;
closedir D;
for my $file (@files) {
next unless $file =~ /\.rules$/ or $file =~ /\.config$/;
&logr("[+] Installing ${snort_dir}/${file}\n");
copy "${snort_dir}/${file}",
"$config{'SNORT_RULES_DIR'}/${file}" or
die "[*] Could not copy ${snort_dir}/${file} -> ",
"$config{'SNORT_RULES_DIR'}/${file}: $!";
&perms_ownership("$config{'SNORT_RULES_DIR'}/${file}", 0600);
}
}
### reputation feed data
my $repu_dir = 'deps/reputation_feeds';
if (-d 'deps' and -d $repu_dir) {
&logr("[+] Installing reputation feed data in " .
"$config{'REPUTATION_FEEDS_DIR'}\n");
unless (-d $config{'REPUTATION_FEEDS_DIR'}) {
&full_mkdir($config{'REPUTATION_FEEDS_DIR'}, 0700);
}
opendir D, $repu_dir or die "[*] Could not open ",
"the $repu_dir directory: $!";
my @files = readdir D;
closedir D;
for my $file (@files) {
next if $file eq '.' or $file eq '..';
&logr("[+] Installing ${repu_dir}/${file}\n");
copy "${repu_dir}/${file}",
"$config{'REPUTATION_FEEDS_DIR'}/${file}" or
die "[*] Could not copy ${repu_dir}/${file} -> ",
"$config{'REPUTATION_FEEDS_DIR'}/${file}: $!";
&perms_ownership("$config{'REPUTATION_FEEDS_DIR'}/${file}", 0600);
}
}
print "\n\n";
&logr("[+] Compiling kmsgsd, and psadwatchd:\n");
### remove any previously compiled kmsgsd
unlink 'kmsgsd' if -e 'kmsgsd';
### remove any previously compiled psadwatchd
unlink 'psadwatchd' if -e 'psadwatchd';
### compile the C psad daemons
&run_cmd($cmds{'make'});
&logr("[-] Could not compile kmsgsd.c.\n") unless (-e 'kmsgsd');
&logr("[-] Could not compile psadwatchd.c.\n") unless (-e 'psadwatchd');
### install fwcheck_psad.pl
print "\n\n";
&logr("[+] Verifying compilation of fwcheck_psad.pl script:\n");
unless (&run_cmd("$cmds{'perl'} -c fwcheck_psad.pl") == 0) {
die "[*] fwcheck_psad.pl does not compile with \"perl -c\". Download ",
"the latest sources from:\n\nhttp://www.cipherdyne.org/"
unless $skip_module_install;
}
### make sure the psad (perl) daemon compiles. The other three
### daemons have all been re-written in C.
&logr("[+] Verifying compilation of psad perl daemon:\n");
unless (&run_cmd("$cmds{'perl'} -c psad") == 0) {
die "[*] psad does not compile with \"perl -c\". Download the",
" latest sources from:\n\nhttp://www.cipherdyne.org/"
unless $skip_module_install;
}
### install nf2csv
&logr("[+] Verifying compilation of nf2csv script:\n");
unless (&run_cmd("$cmds{'perl'} -c nf2csv") == 0) {
die "[*] nf2csv does not compile with \"perl -c\". Download ",
"the latest sources from:\n\nhttp://www.cipherdyne.org/"
unless $skip_module_install;
}
### put the nf2csv script in place
unlink '/usr/sbin/nf2csv' if -e '/usr/sbin/nf2csv'; ### old path
&logr("[+] Copying nf2csv -> ${USRBIN_DIR}/nf2csv\n");
unlink "${USRBIN_DIR}/nf2csv" if -e "${USRBIN_DIR}/nf2csv";
copy 'nf2csv', "${USRBIN_DIR}/nf2csv" or die "[*] Could ",
"not copy nf2csv -> ${USRBIN_DIR}/nf2csv: $!";
&perms_ownership("${USRBIN_DIR}/nf2csv", 0755);
### put the fwcheck_psad.pl script in place
&logr("[+] Copying fwcheck_psad.pl -> $cmds{'fwcheck_psad'}\n");
unlink $cmds{'fwcheck_psad'} if -e $cmds{'fwcheck_psad'};
copy 'fwcheck_psad.pl', $cmds{'fwcheck_psad'} or die "[*] Could ",
"not copy fwcheck_psad.pl -> $cmds{'fwcheck_psad'}: $!";
&perms_ownership($cmds{'fwcheck_psad'}, 0500);
### put the psad daemons in place
&logr("[+] Copying psad -> ${USRSBIN_DIR}/psad\n");
unlink "${USRSBIN_DIR}/psad" if -e "${USRSBIN_DIR}/psad";
copy 'psad', "${USRSBIN_DIR}/psad" or die "[*] Could not copy ",
"psad -> ${USRSBIN_DIR}/psad: $!";
&perms_ownership("${USRSBIN_DIR}/psad", 0500);
&logr("[+] Copying psadwatchd -> ${USRSBIN_DIR}/psadwatchd\n");
unlink "${USRSBIN_DIR}/psadwatchd" if -e "${USRSBIN_DIR}/psadwatchd";
copy 'psadwatchd', "${USRSBIN_DIR}/psadwatchd" or die "[*] Could not ",
"copy psadwatchd -> ${USRSBIN_DIR}/psadwatchd: $!";
&perms_ownership("${USRSBIN_DIR}/psadwatchd", 0500);
&logr("[+] Copying kmsgsd -> ${USRSBIN_DIR}/kmsgsd\n");
unlink "${USRSBIN_DIR}/kmsgsd" if -e "${USRSBIN_DIR}/kmsgsd";
copy 'kmsgsd', "${USRSBIN_DIR}/kmsgsd" or die "[*] Could not copy ",
"kmsgsd -> ${USRSBIN_DIR}/kmsgsd: $!";
&perms_ownership("${USRSBIN_DIR}/kmsgsd", 0500);
unless (-d $config{'PSAD_CONF_DIR'}) {
&logr("[+] Creating $config{'PSAD_CONF_DIR'}\n");
&full_mkdir($config{'PSAD_CONF_DIR'}, 0700);
}
my $syslog_str = '';
if ($install_syslog_fifo) {
### get syslog daemon (e.g. syslog, rsyslog syslog-ng, or metalog)
$syslog_str = &query_syslog();
} else {
print
"[+] psad by default parses iptables log messages from the /var/log/messages\n",
" file, but you can alter this with the IPT_SYSLOG_FILE variable in the\n",
" /etc/psad/psad.conf file.\n";
}
my $preserve_rv = 0;
if (-e "$config{'PSAD_CONF_DIR'}/psad.conf") {
$preserve_rv = &query_preserve_config();
}
### the order of the config files is important (legacy FW_MSG_SEARCH
### vars in psad.conf).
my $prod_file = "$config{'PSAD_CONF_DIR'}/psad.conf";
if (-e $prod_file) {
&archive($prod_file) unless $noarchive;
if ($preserve_rv) {
&preserve_config('psad.conf', $prod_file);
} else {
&logr("[+] Copying psad.conf -> $prod_file\n");
copy 'psad.conf', $prod_file or die "[*] Could not ",
"copy psad.conf -> $prod_file: $!";
}
} else {
&logr("[+] Copying psad.conf -> $prod_file\n");
copy 'psad.conf', $prod_file or die "[*] Could not copy ",
"psad.conf -> $prod_file: $!";
}
if ($force_path_update or not $preserve_rv) {
&update_command_paths($prod_file);
}
&perms_ownership($prod_file, 0600);
### install auto_dl, signatures, icmp_types, posf, and pf.os files
for my $filename (keys %file_vars) {
my $file = $config{$file_vars{$filename}};
if (-e $file) {
&archive($file) unless $noarchive;
### FIXME, need a real config preservation routine for these files.
unless (&query_preserve_sigs_autodl($file)) {
&logr("[+] Copying $filename -> $file\n");
copy $filename, $file or die "[*] Could not ",
"copy $filename -> $file: $!";
&perms_ownership($file, 0600);
}
} else {
&logr("[+] Copying $filename -> $file\n");
copy $filename, $file or die "[*] Could not ",
"copy $filename -> $file: $!";
&perms_ownership($file, 0600);
}
}
### archive and remove legacy config files
for my $filename (qw(kmsgsd.conf psadwatchd.conf alert.conf
fw_search.conf)) {
my $path = "$config{'PSAD_CONF_DIR'}/$filename";
if (-e $path) {
&archive($path);
unlink $path;
}
}
&logr("\n");
unless ($preserve_rv) { ### we want to preserve the existing config
### get email address(es)
my $email_str = &query_email();
if ($email_str) {
&put_var('EMAIL_ADDRESSES', $email_str,
"$config{'PSAD_CONF_DIR'}/psad.conf");
}
### Give the admin the opportunity to set the strings that are
### parsed out of iptables messages. This is useful since the
### admin may have configured the firewall to use a logging prefix
### of "Audit" or something else other than the default string
### "DROP".
my $fw_search_ar = &get_fw_search_strings();
if ($fw_search_ar) {
open F, "< $config{'PSAD_CONF_DIR'}/psad.conf"
or die "[*] Could not open ",
"$config{'PSAD_CONF_DIR'}/psad.conf: $!";
my @lines = <F>;
close F;
open T, "> $config{'PSAD_CONF_DIR'}/psad.conf.tmp"
or die "[*] Could not open ",
"$config{'PSAD_CONF_DIR'}/psad.conf.tmp: $!";
for my $line (@lines) {
if ($line =~ /^\s*FW_MSG_SEARCH\s/) {
for my $fw_str (@$fw_search_ar) {
&logr(qq{[+] Setting FW_MSG_SEARCH to "$fw_str" } .
"in $config{'PSAD_CONF_DIR'}/psad.conf\n");
printf T "%-28s%s;\n", 'FW_MSG_SEARCH', $fw_str;
}
} else {
print T $line unless $line =~ /^\s*FW_MSG_SEARCH\s/;
}
}
close T;
move "$config{'PSAD_CONF_DIR'}/psad.conf.tmp",
"$config{'PSAD_CONF_DIR'}/psad.conf"
or die "[*] Could not move ",
"$config{'PSAD_CONF_DIR'}/psad.conf.tmp -> ",
"$config{'PSAD_CONF_DIR'}/psad.conf: $!";
}
### Give the admin the opportunity to set the HOME_NET variable.
&set_home_net("$config{'PSAD_CONF_DIR'}/psad.conf");
### see if the admin would like to have psad send info to
### DShield
if (&query_dshield()) {
&put_var('ENABLE_DSHIELD_ALERTS', 'Y',
"$config{'PSAD_CONF_DIR'}/psad.conf");
}
### Set the hostname
my $file = "$config{'PSAD_CONF_DIR'}/psad.conf";
&logr("[+] Setting hostname to \"$HOSTNAME\" in $file\n");
&set_hostname($file);
}
if ($install_syslog_fifo) {
&put_var('SYSLOG_DAEMON', $syslog_str,
"$config{'PSAD_CONF_DIR'}/psad.conf");
if ($syslog_str ne 'ulogd') {
my $restarted_syslog = 0;
if ($syslog_str eq 'syslogd') {
if (-e $syslog_conf) {
&append_fifo_syslog($syslog_conf);
if (&run_cmd("$cmds{'pkill'} --signal HUP syslogd 2> /dev/null") == 0) {
&logr("[+] HUP signal sent to syslogd.\n");
$restarted_syslog = 1;
}
}
} elsif ($syslog_str eq 'rsyslogd') {
if (-e $syslog_conf) {
&append_fifo_syslog($syslog_conf);
if (&run_cmd("$cmds{'pkill'} --signal HUP rsyslogd 2> /dev/null") == 0) {
&logr("[+] HUP signal sent to rsyslogd.\n");
$restarted_syslog = 1;
}
}
} elsif ($syslog_str eq 'syslog-ng') {
if (-e $syslog_conf) {
&append_fifo_syslog_ng($syslog_conf);
if (&run_cmd("$cmds{'pkill'} --signal HUP syslog-ng 2> /dev/null") == 0) {
&logr("[+] HUP signal sent to syslog-ng.\n");
$restarted_syslog = 1;
}
}
} elsif ($syslog_str eq 'metalog') {
if (-e $syslog_conf) {
&config_metalog($syslog_conf);
&logr("[-] Metalog support is shaky in psad. " .
"Use at your own risk.\n");
### don't send warning about not restarting metalog daemon
$restarted_syslog = 1;
}
}
unless ($restarted_syslog) {
&logr("[-] Could not restart any syslog daemons.\n");
}
}
}
### download signatures?
&run_cmd("${USRSBIN_DIR}/psad --sig-update") if &query_signatures();
### update reputation feeds?
&run_cmd("${USRSBIN_DIR}/psad --reputation-feeds-update")
if &query_reputation_feeds();
&install_manpage('psad.8');
&install_manpage('psadwatchd.8');
&install_manpage('kmsgsd.8');
&install_manpage('nf2csv.1');
my $init_file = '';
my $installed_init_script = 0;
if ($is_systemd) {
$init_file = 'init-scripts/systemd/psad.service';
} else {
if ($distro eq 'redhat') {
$init_file = 'init-scripts/psad-init.redhat';
} elsif ($distro eq 'fedora') {
$init_file = 'init-scripts/psad-init.fedora';
} elsif ($distro eq 'gentoo') {
$init_file = 'init-scripts/psad-init.gentoo';
} else {
$init_file = 'init-scripts/psad-init.generic';
}
}
if ($init_dir and &is_root()) {
&logr("[+] Copying $init_file -> ${init_dir}/$init_name\n");
copy $init_file, "${init_dir}/$init_name" or die "[*] Could not copy ",
"$init_file -> ${init_dir}/$init_name: $!";
if ($is_systemd) {
&perms_ownership("${init_dir}/$init_name", 0644);
} else {
&perms_ownership("${init_dir}/$init_name", 0744);
}
&enable_psad_at_boot($distro);
$installed_init_script = 1;
}
&logr("\n========================================================\n");
if ($archived_old) {
&logr("[+] Copies of your original configs have been made " .
"in: $config{'CONF_ARCHIVE_DIR'}\n");
}
if ($preserve_rv) {
&logr("\n[+] psad has been installed (with your original config merged).\n");
} else {
&logr("\n[+] psad has been installed.\n");
}
if ($installed_init_script) {
if ($init_dir) {
if ($is_systemd) {
&logr("\n[+] To start psad, run \"$cmds{'systemctl'} start psad\"\n");
} else {
&logr("\n[+] To start psad, run \"${init_dir}/psad start\"\n");
}
} else {
&logr("\n[+] To start psad, run ${USRSBIN_DIR}/psad\"\n");
}
}
return;
}
sub import_config() {
open C, "< $psad_conf_file"
or die "[*] Could not open $psad_conf_file: $!";
while (<C>) {
next if /^\s*#/;
if (/^\s*(\S+)\s+(.*?)\;/) {
my $varname = $1;
my $val = $2;
next if $varname eq 'IP_INFO';
if ($val =~ m|/.+| and $varname =~ /^\s*(\S+)Cmd$/) {
### found a command
$cmds{$1} = $val;
} else {
$config{$varname} = $val;
}
}
}
close C;
### see if the install root is the same as the default in psad.conf and
### update if not
if ($install_root ne '/') {
$install_root = getcwd() . "/$install_root"
unless $install_root =~ m|^/|;
$config{'INSTALL_ROOT'} = $install_root;
$USRSBIN_DIR = $config{'INSTALL_ROOT'} . $USRSBIN_DIR;
$USRBIN_DIR = $config{'INSTALL_ROOT'} . $USRBIN_DIR;
&put_var('INSTALL_ROOT', $install_root, $psad_conf_file);
}
for my $dir ($install_root, $USRSBIN_DIR, $USRBIN_DIR) {
&full_mkdir($dir, 0755) unless -d $dir;
}
if ($install_test_dir) {
&full_mkdir($init_dir, 0755) unless -d $init_dir;
}
### resolve internal vars within variable values
&expand_vars();
&required_vars();
$exclude_cmds{'ifconfig'} = '' if $config{'IFCFGTYPE'} =~ /iproute2/i;
return;
}
sub expand_vars() {
my $has_sub_var = 1;
my $resolve_ctr = 0;
while ($has_sub_var) {
$resolve_ctr++;
$has_sub_var = 0;
if ($resolve_ctr >= 20) {
die "[*] Exceeded maximum variable resolution counter.";
}
for my $hr (\%config, \%cmds) {
for my $var (keys %$hr) {
next if $var eq 'REPUTATION_FEED'
or $var eq 'IP_INFO' or $var eq 'IP_INFO_URL';
my $val = $hr->{$var};
if ($val =~ m|\$(\w+)|) {
my $sub_var = $1;
die "[*] sub-ver $sub_var not allowed within same ",
"variable $var" if $sub_var eq $var;
if (defined $config{$sub_var}) {
if ($sub_var eq 'INSTALL_ROOT' and $config{$sub_var} eq '/') {
$val =~ s|\$$sub_var||;
} else {
$val =~ s|\$$sub_var|$config{$sub_var}|;
}
$hr->{$var} = $val;
} else {
die "[*] sub-var \"$sub_var\" not defined in ",
"config for var: $var."
}
$has_sub_var = 1;
}
}
}
}
return;
}
sub required_vars() {
my @vars = (qw(
INSTALL_LOG_FILE PSAD_DIR PSAD_RUN_DIR PSAD_LIBS_DIR
SIG_UPDATE_URL PSAD_FIFO_DIR PSAD_FIFO_FILE SNORT_RULES_DIR
IP_OPTS_FILE SIGS_FILE AUTO_DL_FILE SNORT_RULE_DL_FILE
POSF_FILE P0F_FILE IP_OPTS_FILE FW_DATA_FILE
));
for my $var (@vars) {
die "[*] Missing required var: $var in $psad_conf_file"
unless defined $config{$var};
}
return;
}
sub uninstall() {
&logr("\n[+] Uninstalling psad from $HOSTNAME: " . localtime() . "\n");
unless (&query_yes_no('[+] This will completely remove psad ' .
"from your system.\n Are you sure (y/n)? ",
$NO_ANS_DEFAULT)) {
&logr("[*] User aborted uninstall by answering \"n\" to the remove " .
"question! Exiting.\n");
exit 0;
}
### after this point, psad will really be uninstalled so stop writing stuff
### to the install.log file. Just print everything to STDOUT
if (-e $config{'PSAD_PID_FILE'}) {
open PID, "$config{'PSAD_PID_FILE'}" or die "[*] Could not open ",
"$config{'PSAD_PID_FILE'}: $!";
my $pid = <PID>;
close PID;
chomp $pid;
if (kill 0, $pid) {
print "[+] Stopping psad daemons!\n";
if (-e "${init_dir}/psad") { ### prefer this for old versions
&run_cmd("${init_dir}/psad stop");
} else {
&run_cmd("${USRSBIN_DIR}/psad --Kill");
}
}
}
if (-e $cmds{'fwcheck_psad'}) {
print "[+] Removing $cmds{'fwcheck_psad'}\n";
unlink $cmds{'fwcheck_psad'};
}
if (-e "${USRBIN_DIR}/nf2csv") {
print "[+] Removing ${USRBIN_DIR}/nf2csv\n";
unlink "${USRBIN_DIR}/nf2csv";
}
if (-e "${USRSBIN_DIR}/psad") {
print "[+] Removing psad daemons: ${USRSBIN_DIR}/",
"(psad, psadwatchd, kmsgsd)\n";
unlink "${USRSBIN_DIR}/psad" or
warn "[*] Could not remove ${USRSBIN_DIR}/psad!!!\n";
unlink "${USRSBIN_DIR}/psadwatchd" or
warn "[*] Could not remove ${USRSBIN_DIR}/psadwatchd!!!\n";
unlink "${USRSBIN_DIR}/kmsgsd" or
warn "[*] Could not remove ${USRSBIN_DIR}/kmsgsd!!!\n";
}
if (-e "${init_dir}/psad") {
print "[+] Removing ${init_dir}/$init_name\n";
unlink "${init_dir}/$init_name";
}
if (-d $config{'PSAD_CONF_DIR'}) {
print "[+] Removing configuration directory: $config{'PSAD_CONF_DIR'}";
rmtree($config{'PSAD_CONF_DIR'}, 1, 0);
}
if (-d $config{'PSAD_DIR'}) {
print "[+] Removing logging directory: $config{'PSAD_DIR'}\n";
rmtree($config{'PSAD_DIR'}, 1, 0);
}
if (-e $config{'PSAD_FIFO_FILE'}) {
print "[+] Removing named pipe: $config{'PSAD_FIFO_FILE'}\n";
unlink $config{'PSAD_FIFO_FILE'};
}
if (-e $cmds{'whois'}) {
print "[+] Removing $cmds{'whois'}\n";
unlink $cmds{'whois'};
}
if (-d $config{'PSAD_FIFO_DIR'}) {
print "[+] Removing $config{'PSAD_FIFO_DIR'}\n";
rmtree $config{'PSAD_FIFO_DIR'};
}
if (-d $config{'PSAD_RUN_DIR'}) {
print "[+] Removing $config{'PSAD_RUN_DIR'}\n";
rmtree $config{'PSAD_RUN_DIR'};
}
my $dir_tmp = $config{'PSAD_LIBS_DIR'};
$dir_tmp =~ s|lib/|lib64/|;
for my $dir ($config{'PSAD_LIBS_DIR'}, $dir_tmp) {
if (-d $dir) {
print "[+] Removing $dir\n";
rmtree $dir;
}
}
print "\n[+] psad has been uninstalled!\n";
return;
}
sub ask_to_stop_psad() {
if (-e $config{'PSAD_PID_FILE'}) {
open P, "< $config{'PSAD_PID_FILE'}" or die "[*] Could not open ",
"$config{'PSAD_PID_FILE'}: $!";
my $pid = <P>;
close P;
chomp $pid;
if (kill 0, $pid) {