--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/check_tlsa Mon May 02 23:07:41 2016 +0200
@@ -0,0 +1,228 @@
+#! /usr/bin/perl
+#dig TLSA _25._tcp.ssl.schlittermann.de +dnssec +m
+#dig TLSA _25._tcp.hh.schlittermann.de
+# http://search.cpan.org/~nierlein/Monitoring-Plugin-0.39/lib/Monitoring/Plugin.pm
+# http://perldoc.perl.org/File/Basename.html
+# needs debian packet: libmonitoring-plugin-perl
+#TLSA Record generieren
+# openssl x509 -in <servername>.crt -outform DER | openssl sha256
+# neben sha256 gibt's noch sha1 sha224 sha256 sha384 sha512
+# sowie md2 md5 rmd160 (wobei ich diese nicht in betracht ziehe)
+# ssl certifikat von einem remote server anfordern
+# openssl s_client -showcerts -connect ssl.schlittermann.de:443 < /dev/null
+# https://github.com/monitoring-plugins
+# https://github.com/monitoring-plugins/monitoring-plugin-perl/blob/master/t/check_stuff.pl
+
+#openssl s_client -starttls smtp -connect ssl.schlittermann.de:25 | openssl x509 -pubkey | openssl rsa -pubin -inform PEM -outform DER | openssl sha256
+#openssl s_client -starttls smtp -connect ssl.schlittermann.de:25 | openssl x509 -outform DER | openssl sha256
+
+use strict;
+use warnings;
+use feature qw(switch);
+use if $^V >= v5.020 => (experimental => qw(smartmatch));
+use experimental qw(smartmatch);
+use Monitoring::Plugin;
+use File::Basename;
+
+#devel
+use Data::Dumper;
+
+use constant LF => "\n";
+
+my $VERSION = '0.1';
+my $blurb = 'This Plugin is intendet to check TLSA Record';
+my $url = 'https://schlittermann.de';
+my $author = 'Heike Yvonne Pesch';
+my $email = '<pesch@schlittermann.de>';
+my $extra = LF.'Author: '.$author.' '.$email.LF
+ . 'For more information visit '.$url;
+my $license = 'GPLv3';
+my $usage = 'Usage: %s [ -v|--verbose ] [-H <host>] [-t <timeout>] '
+ . '[ -c|--critical=<critical threshold> ] '
+ . '[ -w|--warning=<warning threshold> ] '
+ . '[ -p|--port=<portnumber> ] '
+ . '[ -q|--queryserver=<DNS-Server-IP> ] ';
+
+my $check_tlsa = Monitoring::Plugin->new(
+ usage => $usage,
+ version => $VERSION,
+ blurb => $blurb,
+ extra => $extra,
+ url => $url,
+ license => $license,
+ plugin => basename $0,
+ timeout => 60,
+);
+
+$check_tlsa->add_arg(
+ spec => 'host|H=s',
+ help => q|Host/Domain to check|,
+ required => 0,
+);
+
+$check_tlsa->add_arg(
+ spec => 'hostlist|f=s',
+ help => q|Host/Domainlist in file to check|,
+ required => 0,
+);
+
+$check_tlsa->add_arg(
+ spec => 'expiry|e',
+ help => q|check expiry of Certificate|,
+ required => 0,
+);
+
+$check_tlsa->add_arg(
+ spec => 'port|p=i',
+ help => q|Port of Domain to check the TLSA (default: 443)|,
+ required => 0,
+ default => 443,
+);
+
+$check_tlsa->add_arg(
+ spec => 'queryserver|q=s',
+ help => q|DNS Server to ask to check the TLSA (default: defined in resolve.conf)|,
+ required => 0,
+ #default => '8.8.8.8',
+);
+
+$check_tlsa->add_arg(
+ spec => 'protocol|P=s',
+ help => q|DNS Server to ask to check the TLSA (default: tcp)|,
+ required => 0,
+ default => 'tcp',
+);
+
+$check_tlsa->getopts;
+
+my $domain = $check_tlsa->opts->host;
+my $domainlist = $check_tlsa->opts->hostlist;
+my $expiry = $check_tlsa->opts->expiry;
+
+if (!$domain && !$domainlist) {
+ my $script = basename $0;
+ my $excuse = "Please set -H <domain> or -f <domainlist>\n"
+ . "For all options try $script --help";
+
+ print $excuse,LF;
+ exit 1;
+}
+
+
+ my $port;
+ my $cert;
+ my $check_date;
+
+ if ( defined $domainlist && -e $domainlist){
+ print get_domains();
+ }
+ else { print check_tlsa(); }
+
+sub check_tlsa {
+ my $protocol = $check_tlsa->opts->protocol;
+
+ $port = $check_tlsa->opts->port unless $port ;
+
+ if ("$port" eq '25') {
+ $cert = "openssl s_client -starttls smtp -connect $domain:$port "
+ . '< /dev/null 2>/dev/null';
+ }
+ else {
+ #$port = $check_tlsa->opts->port;
+ $cert = "openssl s_client -connect $domain:$port "
+ . '< /dev/null 2>/dev/null';
+ }
+
+ my $digquery = "dig TLSA _$port._$protocol.$domain +short";
+ my $diganswer = qx($digquery);
+ my $dig = substr($diganswer, 6, );
+ $dig =~ s/(\S*)\s+(\S*)$/$1$2/;
+ my $tlsa_usage = substr($diganswer, 0, 1);
+ my $tlsa_selector = substr($diganswer, 2, 1);
+ my $tlsa_match_type = substr($diganswer, 4, 1);
+ my $hashit;
+
+ for ($tlsa_match_type) {
+ when('0') { die 'certs will be compared directly'}
+ when('1') {$hashit = 'sha256'}
+ when('2') {$hashit = 'sha512'}
+ default {$hashit = 'sha256'}
+ };
+
+ my $gentlsa = 'openssl x509 -pubkey | '
+ . 'openssl rsa -pubin -inform PEM -outform DER 2>/dev/null| '
+ . "openssl $hashit";
+ my $certtlsa = "$cert | $gentlsa";
+
+ $check_date = 'openssl x509 -noout -startdate -enddate';
+ $check_date = "$cert|$check_date";
+
+
+ my $return;
+
+ my $tlsa_record = qx($certtlsa) or die "nothing found!\n";
+ $tlsa_record =~ s/^.*= (.*$)/$1/gi;
+ $tlsa_record = uc($tlsa_record);
+
+ if (defined $expiry) {
+ print check_cert_expiry();
+ }
+
+ if ("$tlsa_record" eq "$dig") {
+ #$return = "TLSA record is $tlsa_record and valid";
+ #funktioniert nich nicht optimal mit hostliste
+ $return = $check_tlsa->plugin_exit(OK, "$domain: TLSA record is valid")
+ . "$domain: TLSA record is valid\n";
+ }
+ else {
+ $check_tlsa->plugin_exit(CRITICAL, "$domain: TLSA record NOT valid");
+ }
+ return $return;
+ #return $cert;
+}
+
+
+
+sub get_domains {
+ open(my $filehandle, '<', $domainlist);
+
+ my $pattern = '^(?<domain>\S*\.[a-z]{2,4}?):{0,1}(?<port>[0-9]*$)';
+ my %domain2check;
+ while(<$filehandle>) {
+ if (/$pattern/ig) {
+ $domain = $+{domain};
+ $port = $+{port};
+ #print "nunu,file ok",LF,"port: $+{port}",LF,"domain: $+{domain}",LF;
+ $domain2check{$domain} = $port;
+
+
+
+
+
+ #print check_tlsa();
+ }
+ else {
+ die "wrong content";
+ }
+
+ foreach my $key (%domain2check)
+ {
+ $domain = $key;
+ $port = $domain2check{$key};
+ print $domain, ' ', $port,"\n";
+
+
+ if ( "$port" =~ /^\s*$/) { $port = '443'; }
+ print $domain, ' ', $port,"\n";
+
+ check_tlsa($domain,$port);
+ }
+
+ }
+}
+
+sub check_cert_expiry {
+ my $return = qx($check_date);
+ return $return;
+}
+