141 lines
5.8 KiB
Bash
Executable File
141 lines
5.8 KiB
Bash
Executable File
#!/bin/sh
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set -eu
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trap error 0
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STATE_OK=0
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STATE_WARNING=1
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STATE_CRITICAL=2
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STATE_UNKNOWN=3
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STATE=$STATE_OK
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CERT_STATE=$STATE
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CA_STATE=$STATE
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CERT_ECHO=""
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CA_ECHO=""
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error() {
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if [ $? -eq 2 ] && [ "X$CERT_ECHO" = "X" ] && [ "X$CA_ECHO" = "X" ] ; then
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echo "CRITICAL - The check exited with an error. Is the conf_file var containing the real conf file location ?"
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fi
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}
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SYSTEM=$(uname | tr '[:upper:]' '[:lower:]')
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date_cmd=$(command -v date)
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# Dates in seconds
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_15_days="1296000"
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_30_days="2592000"
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current_date=$($date_cmd +"%s")
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# Trying to define the OpenVPN conf file location - default to /etc/openvpn/server.conf
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conf_file=$(ps auwwwx | grep openvpn | grep -- --config | grep -v sed | sed -e "s/.*config \(\/etc\/openvpn.*.conf\).*/\1/")
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[ "$SYSTEM" = "openbsd" ] && conf_file=${conf_file:-$(grep openvpn_flags /etc/rc.conf.local | sed -e "s/.*config \(\/etc\/openvpn.*.conf\).*/\1/")}
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conf_file=${conf_file:-"/etc/openvpn/server.conf"}
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# Get the cert and ca file location, based on the OpenVPN conf file location
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# Done in 2 times because sh does not support pipefail - needed in the case where $conf_file does not exist
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cert_file=$(grep -s "^cert " $conf_file)
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cert_file=$(echo $cert_file | sed -e "s/^cert *\//\//")
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ca_file=$(grep -s "^ca " $conf_file)
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ca_file=$(echo $ca_file | sed -e "s/^ca *\//\//")
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# Get expiration date of cert and ca certificates
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cert_expiration_date=$(grep "Not After" $cert_file | sed -e "s/.*Not After : //")
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ca_expiration_date=$(openssl x509 -enddate -noout -in $ca_file | cut -d '=' -f 2)
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test_cert_expiration() {
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# Already expired - Cert file
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if [ $current_date -ge $1 ]; then
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CERT_ECHO="CRITICAL - The server certificate has expired on $formatted_cert_expiration_date"
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CERT_STATE=$STATE_CRITICAL
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# Expiration in 15 days or less - Cert file
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elif [ $((current_date+_15_days)) -ge $1 ]; then
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CERT_ECHO="CRITICAL - The server certificate expires in 15 days or less : $formatted_cert_expiration_date"
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CERT_STATE=$STATE_CRITICAL
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# Expiration in 30 days or less - Cert file
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elif [ $((current_date+_30_days)) -ge $1 ]; then
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CERT_ECHO="WARNING - The server certificate expires in 30 days or less : $formatted_cert_expiration_date"
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CERT_STATE=$STATE_WARNING
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# Expiration in more than 30 days - Cert file
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else
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CERT_ECHO="OK - The server certificate expires on $formatted_cert_expiration_date"
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CERT_STATE=$STATE_OK
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fi
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}
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test_ca_expiration() {
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# Already expired - CA file
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if [ $current_date -ge $1 ]; then
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CA_ECHO="CRITICAL - The server CA has expired on $formatted_ca_expiration_date"
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CA_STATE=$STATE_CRITICAL
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# Expiration in 15 days or less - CA file
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elif [ $((current_date+_15_days)) -ge $1 ]; then
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CA_ECHO="CRITICAL - The server CA expires in 15 days or less : $formatted_ca_expiration_date"
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CA_STATE=$STATE_CRITICAL
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# Expiration in 30 days or less - CA file
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elif [ $((current_date+_30_days)) -ge $1 ]; then
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CA_ECHO="WARNING - The server CA expires in 30 days or less : $formatted_ca_expiration_date"
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CA_STATE=$STATE_WARNING
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# Expiration in more than 30 days - CA file
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else
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CA_ECHO="OK - The server CA expires on $formatted_ca_expiration_date"
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CA_STATE=$STATE_OK
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fi
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}
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# Linux and BSD systems do not implement 'date' the same way
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if [ "$SYSTEM" = "linux" ]; then
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# Cert expiration date human formated then in seconds
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formatted_cert_expiration_date=$(TZ="Europe/Paris" $date_cmd -d "$cert_expiration_date" +"%F %T %Z")
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seconds_cert_expiration_date=$(TZ="Europe/Paris" $date_cmd -d "$cert_expiration_date" +"%s")
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# CA expiration date human formated then in seconds
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formatted_ca_expiration_date=$(TZ="Europe/Paris" $date_cmd -d "$ca_expiration_date" +"%F %T %Z")
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seconds_ca_expiration_date=$(TZ="Europe/Paris" $date_cmd -d "$ca_expiration_date" +"%s")
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test_cert_expiration $seconds_cert_expiration_date
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test_ca_expiration $seconds_ca_expiration_date
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elif [ "$SYSTEM" = "openbsd" ]; then
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# Cert expiration date for POSIX date, human formated then in seconds
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posix_cert_expiration_date=$(echo "$cert_expiration_date" | awk '{ printf $4" "(index("JanFebMarAprMayJunJulAugSepOctNovDec",$1)+2)/3" "$2" ",split($3,time,":"); print time[1],time[2],time[3]}' | awk '{printf "%04d%02d%02d%02d%02d.%02d\n", $1, $2, $3, $4, $5, $6}')
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cert_zone=$(echo "$cert_expiration_date" | awk '{print $5}')
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formatted_cert_expiration_date=$(TZ=$cert_zone $date_cmd -j -z "Europe/Paris" "$posix_cert_expiration_date" +"%F %T %Z")
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seconds_cert_expiration_date=$(TZ=$cert_zone $date_cmd -j -z "Europe/Paris" "$posix_cert_expiration_date" +"%s")
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# CA expiration date for POSIX date, human formated then in seconds
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posix_ca_expiration_date=$(echo "$ca_expiration_date" | awk '{ printf $4" "(index("JanFebMarAprMayJunJulAugSepOctNovDec",$1)+2)/3" "$2" ",split($3,time,":"); print time[1],time[2],time[3]}' | awk '{printf "%04d%02d%02d%02d%02d.%02d\n", $1, $2, $3, $4, $5, $6}')
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ca_zone=$(echo "$ca_expiration_date" | awk '{print $5}')
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formatted_ca_expiration_date=$(TZ=$ca_zone $date_cmd -j -z "Europe/Paris" "$posix_ca_expiration_date" +"%F %T %Z")
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seconds_ca_expiration_date=$(TZ=$ca_zone $date_cmd -j -z "Europe/Paris" "$posix_ca_expiration_date" +"%s")
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test_cert_expiration $seconds_cert_expiration_date
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test_ca_expiration $seconds_ca_expiration_date
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# If neither Linux nor BSD
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else
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echo "CRITICAL - OS not supported"
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STATE=$STATE_CRITICAL
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exit $STATE
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fi
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# Display the first one that expires first
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if [ $CA_STATE -gt $CERT_STATE ]; then
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echo $CA_ECHO
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echo $CERT_ECHO
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exit $CA_STATE
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elif [ $CERT_STATE -gt $CA_STATE ]; then
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echo $CERT_ECHO
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echo $CA_ECHO
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exit $CERT_STATE
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else
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echo $CERT_ECHO
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echo $CA_ECHO
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exit $CERT_STATE
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fi
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