#3298 - SSL monitoring script for icinga

check_ssl_cert.sh

Index: check_ssl_cert.sh
diff --git a/check_ssl_cert.sh b/check_ssl_cert.sh
new file mode 100755
index 0000000000000000000000000000000000000000..3553857bb6b67c196da6e64f82f2598dd290192c
--- /dev/null
+++ b/check_ssl_cert.sh
@@ -0,0 +1,88 @@
+#!/bin/sh
+
+# Icinga plugin that checks how many days are left until SSL certificate expires
+# Usage: <PluginDir>/check_ssl_cert -H <HOSTNAME> -P <PORT> -c <CRITICAL> -w <WARNING>
+
+PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin"
+export PATH
+PROGNAME=`basename $0`
+PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`
+
+. $PROGPATH/utils.sh
+
+CURRENT_DATE=`date +%y%m%d`
+HOST=$2
+PORT=$4
+CRITICAL=$6
+WARNING=$8
+
+DAY=`echo | openssl s_client -connect "$HOST":$PORT 2>/dev/null | openssl x509 -noout -enddate 2>/dev/null | awk '{print $2}'`
+
+if [ ! $DAY ]
+then
+  echo "UNKNOWN - Could not connect to $HOST via port $PORT"
+  exit $STATE_UNKNOWN
+fi
+
+MONTH=`echo | openssl s_client -connect "$HOST":$PORT 2>/dev/null | openssl x509 -noout -enddate | awk '{print $1}'`
+MONTH=`echo ${MONTH#*=}`
+YEAR=`echo | openssl s_client -connect "$HOST":$PORT 2>/dev/null | openssl x509 -noout -enddate | awk '{print $4}'`
+
+case $MONTH in
+  "Jan")
+    MONTH="01"
+    ;;
+  "Feb")
+    MONTH="02"
+    ;;
+  "Mar")
+    MONTH="03"
+    ;;
+  "Apr")
+    MONTH="04"
+    ;;
+  "May")
+    MONTH="05"
+    ;;
+  "Jun")
+    MONTH="06"
+    ;;
+  "Jul")
+    MONTH="07"
+    ;;
+  "Aug")
+    MONTH="08"
+    ;;
+  "Sep")
+    MONTH="09"
+    ;;
+  "Oct")
+    MONTH="10"
+    ;;
+  "Nov")
+    MONTH="11"
+    ;;
+  "Dec")
+    MONTH="12"
+    ;;
+  "*")
+esac
+
+DIFF=$(( ($(date --date="$YEAR$MONTH$DAY" +%s) - $(date --date="$CURRENT_DATE" +%s) )/(60*60*24) ))
+
+if [ $DIFF -le $CRITICAL ]
+then
+  echo "CRITICAL - $HOST: SSL certificate has been expired!"
+  exit $STATE_CRITICAL
+elif [ $DIFF -le $WARNING ] && [ $DIFF -gt $CRITICAL ]
+then
+  echo "WARNING - $HOST: SSL certificate will be expired in $DIFF days!"
+  exit $STATE_WARNING
+elif [ $DIFF -gt $WARNING ]
+then
+  echo "OK - $HOST: SSL certificate will be expired in $DIFF days"
+  exit $STATE_OK
+else
+  echo "UNKNOWN - $HOST: Could not retrieve data"
+  exit $STATE_UNKNOWN
+fi