From 2928b5fdbe64ce58b725308f2a443290ef4ecbce Mon Sep 17 00:00:00 2001
From: Daniel Berteaud <daniel@firewall-services.com>
Date: Wed, 19 Feb 2014 09:27:07 +0100
Subject: [PATCH] Add scripts to monitor PHPki certificates

---
 createlinks                                        |  3 +-
 .../zabbix_agentd.conf.d/phpki_certs.conf/10All    | 23 ++++++++++
 root/var/lib/zabbix/bin/check_certs_sudo           | 33 +++++++++++++++
 root/var/lib/zabbix/bin/disco_certs_sudo           | 49 ++++++++++++++++++++++
 4 files changed, 107 insertions(+), 1 deletion(-)
 create mode 100644 root/etc/e-smith/templates/etc/zabbix/zabbix_agentd.conf.d/phpki_certs.conf/10All
 create mode 100644 root/var/lib/zabbix/bin/check_certs_sudo
 create mode 100644 root/var/lib/zabbix/bin/disco_certs_sudo

diff --git a/createlinks b/createlinks
index c91aeb1..573ab65 100644
--- a/createlinks
+++ b/createlinks
@@ -6,7 +6,8 @@ use esmith::Build::CreateLinks  qw(:all);
 foreach my $conf (qw!zabbix_agent.conf zabbix_agentd.conf zabbix_agentd.conf.d/asterisk.conf
                      zabbix_agentd.conf.d/deprecated_cpunum.conf zabbix_agentd.conf.d/deprecated_memory.conf
                      zabbix_agentd.conf.d/deprecated_netstat.conf zabbix_agentd.conf.d/deprecated_swap.conf
-                     zabbix_agentd.conf.d/extip.conf zabbix_agentd.conf.d/mail.conf zabbix_agentd.conf.d/mysql.conf!){
+                     zabbix_agentd.conf.d/extip.conf zabbix_agentd.conf.d/mail.conf zabbix_agentd.conf.d/mysql.conf
+                     zabbix_agentd.conf.d/phpki_certs.conf!){
     templates2events("/etc/zabbix/$conf", qw(zabbix-agent-update bootstrap-console-save));
 }
 templates2events("/etc/sudoers", "zabbix-agent-update");
diff --git a/root/etc/e-smith/templates/etc/zabbix/zabbix_agentd.conf.d/phpki_certs.conf/10All b/root/etc/e-smith/templates/etc/zabbix/zabbix_agentd.conf.d/phpki_certs.conf/10All
new file mode 100644
index 0000000..4e8954b
--- /dev/null
+++ b/root/etc/e-smith/templates/etc/zabbix/zabbix_agentd.conf.d/phpki_certs.conf/10All
@@ -0,0 +1,23 @@
+{
+
+if (-e '/opt/phpki/phpki-store/CA/index.txt'){
+    $OUT .=<<'EOF';
+
+# Discovery of certificates and their status
+# Key: pki.certs.discovery
+# Macro: 
+# - {#CRTCN} : contains the common name
+# - {#CRTSERIAL} : the serial number
+# - {#CRTSTATUS} : the status, as a string (valid, revoked, expired)
+# Available arguments:
+# --index : path to the index file
+# --path : directory where certificatres are stored, certificates should be named $serial.pem (in PEM format)
+
+UserParameter=pki.certs.discovery,/usr/bin/sudo /var/lib/zabbix/bin/disco_certs_sudo --index=/opt/phpki/phpki-store/CA/index.txt --path=/opt/phpki/phpki-store/CA/newcerts/
+UserParameter=pki.certs[*],/usr/bin/sudo /var/lib/zabbix/bin/check_certs_sudo --what=$1 --cert=$2
+
+EOF
+}
+$OUT .= '';
+
+}
diff --git a/root/var/lib/zabbix/bin/check_certs_sudo b/root/var/lib/zabbix/bin/check_certs_sudo
new file mode 100644
index 0000000..5ae3641
--- /dev/null
+++ b/root/var/lib/zabbix/bin/check_certs_sudo
@@ -0,0 +1,33 @@
+#!/usr/bin/perl -w
+
+# Check a PEM certificate
+# --what: what to monitor. Only expire is supported for now, and returns the number of day before expiration
+# --cert: the path to the certificate you want to check
+
+use strict;
+use warnings;
+use Crypt::OpenSSL::X509;
+use Date::Parse;
+use Getopt::Long;
+
+my $what = 'expire';
+my $cert = '';
+
+GetOptions(
+    "cert=s" => \$cert,
+    "what=s"  => \$what
+);
+
+die "Usage: $0 --what=status --cert=/path/to/pem/certificate\n" unless
+    (-f $cert);
+
+$cert = Crypt::OpenSSL::X509->new_from_file( "$cert" );
+my $expire_in = int ((str2time($cert->notAfter())-time())/(3600*24));
+
+if ($what eq 'expire'){
+    print $expire_in;
+}
+else{
+    die "Only expire is supported for now";
+}
+
diff --git a/root/var/lib/zabbix/bin/disco_certs_sudo b/root/var/lib/zabbix/bin/disco_certs_sudo
new file mode 100644
index 0000000..88c1ecf
--- /dev/null
+++ b/root/var/lib/zabbix/bin/disco_certs_sudo
@@ -0,0 +1,49 @@
+#!/usr/bin/perl -w
+
+use strict;
+use warnings;
+use Crypt::OpenSSL::X509;
+use Date::Parse;
+use Getopt::Long;
+use JSON;
+
+my $index = '/opt/phpki/phpki-store/CA/index.txt';
+my $path = '/opt/phpki/phpki-store/CA/newcerts';
+
+GetOptions(
+    "index=s" => \$index,
+    "path=s"  => \$path
+);
+
+open INDEX, "$index" or die "Couldn't open $index\n";
+
+my $json;
+
+foreach my $l (<INDEX>){
+    next unless $l =~ m/^([VR])\t\d+Z\t(\d+Z)?\t(\w+)\tunknown\t.*/;
+    my $status = $1;
+    my $serial = $3;
+    my $cert = Crypt::OpenSSL::X509->new_from_file( "$path/$serial.pem" );
+
+    my $expire_in = int ((str2time($cert->notAfter())-time())/(3600*24));
+    if ($status eq 'V'){
+        $status = 'valid';
+    }
+    elsif ($expire_in lt 0){
+        $status = 'expired';
+    }
+    else{
+        $status = 'revoked';
+    }
+    my $subject = $cert->subject;
+    $subject =~ m/.*\sCN=(.*),/;
+    my $cn = $1;
+
+    push @{$json->{data}}, {
+          "{#CRTCN}" => $cn,
+          "{#CRTSERIAL}" => $serial,
+          "{#CRTSTATUS}" => $status,
+    };
+}
+close INDEX;
+print to_json($json);