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Script to check SSL certificates for expiry. Slightly modified version of: http://prefetch.net/code/ssl-cert-check
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| #!/bin/bash | |
| # | |
| # Program: SSL Certificate Check <ssl-cert-check> | |
| # | |
| # Source code home: http://prefetch.net/code/ssl-cert-check | |
| # | |
| # Documentation: http://prefetch.net/articles/checkcertificate.html | |
| # | |
| # Author: Matty < matty91 at gmail dot com > | |
| # Modified: Laas Toom <laas dot toom at gmail dot com > | |
| # | |
| # Current Version: 3.28 | |
| # | |
| # Revision History: | |
| # | |
| # Version 3.28 | |
| # - Changed alert e-mail to be more informative for files. | |
| # | |
| # Version 3.27 | |
| # - Allow white spaces to exist in the certificate file list | |
| # - Add an additional check to pick up bad / non-existent certificates | |
| # - Add a check to look for the existence of a mail program. Error out if it's not present. | |
| # - Enable the TLS -servername extension by default - Juergen Knaack & Johan Denoyer | |
| # | |
| # Version 3.26 | |
| # - Allow the certificate type (PEM, DER, NET) to be passed on the command line | |
| # | |
| # Version 3.25 | |
| # - Check for "no route to host" errors -- Dan Doyle | |
| # - Set RETCODE to 3 (unknown) if a connection error occurs -- Dan Doyle | |
| # - Documentation fixes | |
| # | |
| # Version 3.24 | |
| # - Utilize the -clcerts option to limit the results to client certificates - Eitan Katznelson | |
| # | |
| # Version 3.23 | |
| # - Fixed typo in date2julian routine -- Ken Cook | |
| # | |
| # Version 3.22 | |
| # - Change the validation option to "-V" | |
| # - Add a "-v" option to specify a specific protocol version (ssl2, ssl3 or tls) | |
| # | |
| # Version 3.21 | |
| # - Adjust e-mail checking to avoid exiting if notifications aren't enabled -- Nick Anderson | |
| # - Added the number of days until expiration to the Nagios output -- Nick Anderson | |
| # | |
| # Version 3.20 | |
| # - Fixed a bug in certificate length checking -- Tim Nowaczyk | |
| # | |
| # Version 3.19 | |
| # - Added check to verify the certificate retrieved is valid | |
| # | |
| # Version 3.18 | |
| # - Add support for connecting to FTP servers -- Paul A Sand | |
| # | |
| # Version 3.17 | |
| # - Add support for connecting to imap servers -- Joerg Pareigis | |
| # | |
| # Version 3.16 | |
| # - Add support for connecting to the mail sbmission port -- Luis E. Munoz | |
| # | |
| # Version 3.15 | |
| # - Adjusted the file checking logic to use the correct certificate -- Maciej Szudejko | |
| # - Add sbin to the default search paths for OpenBSD compatibility -- Alex Popov | |
| # - Use cut instead of substring processing to ensure compatibility -- Alex Popov | |
| # | |
| # Version 3.14 | |
| # - Fixed the Common Name parser to handle DN's where the CN is not the last item | |
| # eg. EmailAddr -- Jason Brothers | |
| # - Added the ability to grab the serial number -- Jason Brothers | |
| # - Added the "-b" option to print results without a header -- Jason Brothers | |
| # - Added the "-v" option for certificate validation -- Jason Brothers | |
| # | |
| # Version 3.13 | |
| # - Updated the subject line to include the hostname as well as | |
| # the common name embedded in the X509 certificate (if it's | |
| # available) -- idea proposed by Mike Burns | |
| # | |
| # Version 3.12 | |
| # - Updated the license to allow redistribution and modification | |
| # | |
| # Version 3.11 | |
| # - Added ability to comment out lines in files passed | |
| # to the "-f" option -- Brett Stauner | |
| # - Fixed comment next to file processing logic | |
| # | |
| # Version 3.10 | |
| # - Fixed POP3 port -- Simon Matter | |
| # | |
| # Version 3.9 | |
| # - Switched binary location logic to use which utility | |
| # | |
| # Version 3.8 | |
| # - Fixed display on 80 column displays | |
| # - Cleaned up the formatting | |
| # | |
| # Version 3.7 | |
| # - Fixed bug in NAGIOS tests -- Ben Allen | |
| # | |
| # Version 3.6 | |
| # - Added support for certificates stored in PKCS#12 databases -- Ken Gallo | |
| # - Cleaned up comments | |
| # - Adjusted variables to be more consistent | |
| # | |
| # Version 3.5 | |
| # - Added support for NAGIOS -- Quanah Gibson-Mount | |
| # - Added additional checks for mail -- Quanah Gibson-Mount | |
| # - Convert tabs to spaces -- Quanah Gibson-Mount | |
| # - Cleaned up usage() routine | |
| # - Added additional checks for openssl | |
| # | |
| # Version 3.4 | |
| # - Added a missing "{" to line 364 -- Ken Gallo | |
| # - Move mktemp to the start of the main body to avoid errors | |
| # - Adjusted default binary paths to make sure the script just works | |
| # w/ Solaris, BSD and Linux hosts | |
| # | |
| # Version 3.3 | |
| # - Added common name from X.509 certificate file to E-mail body / header -- Doug Curtis | |
| # - Fixed several documentation errors | |
| # - Use mktemp to create temporary files | |
| # - Convert printf, sed and awk to variables | |
| # - Check for printf, sed, awk and mktemp binaries | |
| # - Add additional logic to make sure mktemp returned a valid temporary file | |
| # | |
| # Version 3.2 | |
| # - Added option to list certificates in the file passed to "-f". | |
| # | |
| # Version 3.1 | |
| # - Added handling for starttls for smtp -- Marco Amrein | |
| # - Added handling for starttls for pop3 (without s) -- Marco Amrein | |
| # - Removed extra spacing at end of script | |
| # | |
| # Version 3.0 | |
| # - Added "-i" option to print certificate issuer | |
| # - Removed $0 from Subject line of outbound e-mails | |
| # - Fixed some typographical errors | |
| # - Removed redundant "-b" option | |
| # | |
| # Version 2.0 | |
| # - Fixed an issue with e-mails formatting incorrectly | |
| # - Added additional space to host column -- Darren-Perot Spruell | |
| # - Replaced GNU date dependency with CHRIS F. A. JOHNSON's | |
| # date2julian shell function. This routine can be found on | |
| # page 170 of Chris's book "Shell Scripting Recipes: A | |
| # Problem-Solution Approach," ISBN #1590594711. Julian function | |
| # was created based on a post to comp.unix.shell by Tapani Tarvainen. | |
| # - Cleaned up function descriptions | |
| # - Removed several lines of redundant code | |
| # - Adjusted the help message | |
| # | |
| # Version 1.1 | |
| # - Added "-c" flag to report expiration status of a PEM encoded | |
| # certificate -- Hampus Lundqvist | |
| # - Updated the prints messages to display the reason a connection | |
| # failed (connection refused, connection timeout, bad cert, etc) | |
| # - Updated the GNU date checking routines | |
| # - Added checks for each binary required | |
| # - Added checks for connection timeouts | |
| # - Added checks for GNU date | |
| # - Added a "-h" option | |
| # - Cleaned up the documentation | |
| # | |
| # Version 1.0 | |
| # Initial Release | |
| # | |
| # Last Updated: 02-27-2013 | |
| # | |
| # Purpose: | |
| # ssl-cert-check checks to see if a digital certificate in X.509 format | |
| # has expired. ssl-cert-check can be run in interactive and batch mode, | |
| # and provides facilities to alarm if a certificate is about to expire. | |
| # | |
| # License: | |
| # This program is free software; you can redistribute it and/or modify | |
| # it under the terms of the GNU General Public License as published by | |
| # the Free Software Foundation; either version 2 of the License, or | |
| # (at your option) any later version. | |
| # | |
| # 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. | |
| # | |
| # Requirements: | |
| # Requires openssl | |
| # | |
| # Installation: | |
| # Copy the shell script to a suitable location | |
| # | |
| # Tested platforms: | |
| # -- Solaris 9 using /bin/bash | |
| # -- Solaris 10 using /bin/bash | |
| # -- OS X 10.4.2 using /bin/bash | |
| # -- OpenBSD using /bin/sh | |
| # -- FreeBSD using /bin/sh | |
| # -- Centos Linux 3, 4, 5 & 6 using /bin/bash | |
| # -- Redhat Enterprise Linux 3, 4, 5 & 6 using /bin/bash | |
| # | |
| # Usage: | |
| # Refer to the usage() sub-routine, or invoke ssl-cert-check | |
| # with the "-h" option. | |
| # | |
| # Examples: | |
| # Please refer to the following site for documentation and examples: | |
| # http://prefetch.net/articles/checkcertificate.html | |
| PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin:/usr/local/ssl/bin:/usr/sfw/bin | |
| export PATH | |
| # Who to page when an expired certificate is detected (cmdline: -e) | |
| ADMIN="root" | |
| # Number of days in the warning threshhold (cmdline: -x) | |
| WARNDAYS=30 | |
| # If QUIET is set to TRUE, don't print anything on the console (cmdline: -q) | |
| QUIET="FALSE" | |
| # Don't send E-mail by default (cmdline: -a) | |
| ALARM="FALSE" | |
| # Don't run as a Nagios plugin by default (cmdline: -n) | |
| NAGIOS="FALSE" | |
| # NULL out the PKCSDBPASSWD variable for later use (cmdline: -k) | |
| PKCSDBPASSWD="" | |
| # Type of certificate (PEM, DER, NET) (cmdline: -t) | |
| CERTTYPE="pem" | |
| # Protocol version to use (cmdline: -v) | |
| VERSION="" | |
| # Send along the servername when TLS is used | |
| TLSSERVERNAME="FALSE" | |
| # Location of system binaries | |
| AWK=$(which awk) | |
| DATE=$(which date) | |
| GREP=$(which grep) | |
| OPENSSL=$(which openssl) | |
| PRINTF=$(which printf) | |
| SED=$(which sed) | |
| MKTEMP=$(which mktemp) | |
| # Try to find a mail client | |
| if [ -f /usr/bin/mailx ] | |
| then | |
| MAIL="/usr/bin/mailx" | |
| elif [ -f /bin/mail ] | |
| then | |
| MAIL="/bin/mail" | |
| elif [ -f /usr/bin/mail ] | |
| then | |
| MAIL="/usr/bin/mail" | |
| elif [ -f /sbin/mail ] | |
| then | |
| MAIL="/sbin/mail" | |
| elif [ -f /usr/sbin/mail ] | |
| then | |
| MAIL="/usr/sbin/mail" | |
| else | |
| MAIL="cantfindit" | |
| fi | |
| # Return code used by nagios. Initialize to 0. | |
| RETCODE=0 | |
| # Set the default umask to be somewhat restrictive | |
| umask 077 | |
| ############################################################################# | |
| # Purpose: Convert a date from MONTH-DAY-YEAR to Julian format | |
| # Acknowledgements: Code was adapted from examples in the book | |
| # "Shell Scripting Recipes: A Problem-Solution Approach" | |
| # ( ISBN 1590594711 ) | |
| # Arguments: | |
| # $1 -> Month (e.g., 06) | |
| # $2 -> Day (e.g., 08) | |
| # $3 -> Year (e.g., 2006) | |
| ############################################################################# | |
| date2julian() { | |
| if [ "${1}" != "" ] && [ "${2}" != "" ] && [ "${3}" != "" ] | |
| then | |
| ## Since leap years add aday at the end of February, | |
| ## calculations are done from 1 March 0000 (a fictional year) | |
| d2j_tmpmonth=$((12 * ${3} + ${1} - 3)) | |
| ## If it is not yet March, the year is changed to the previous year | |
| d2j_tmpyear=$(( ${d2j_tmpmonth} / 12)) | |
| ## The number of days from 1 March 0000 is calculated | |
| ## and the number of days from 1 Jan. 4713BC is added | |
| echo $(( (734 * ${d2j_tmpmonth} + 15) / 24 | |
| - 2 * ${d2j_tmpyear} + ${d2j_tmpyear}/4 | |
| - ${d2j_tmpyear}/100 + ${d2j_tmpyear}/400 + $2 + 1721119 )) | |
| else | |
| echo 0 | |
| fi | |
| } | |
| ############################################################################# | |
| # Purpose: Convert a string month into an integer representation | |
| # Arguments: | |
| # $1 -> Month name (e.g., Sep) | |
| ############################################################################# | |
| getmonth() | |
| { | |
| case ${1} in | |
| Jan) echo 1 ;; | |
| Feb) echo 2 ;; | |
| Mar) echo 3 ;; | |
| Apr) echo 4 ;; | |
| May) echo 5 ;; | |
| Jun) echo 6 ;; | |
| Jul) echo 7 ;; | |
| Aug) echo 8 ;; | |
| Sep) echo 9 ;; | |
| Oct) echo 10 ;; | |
| Nov) echo 11 ;; | |
| Dec) echo 12 ;; | |
| *) echo 0 ;; | |
| esac | |
| } | |
| ############################################################################# | |
| # Purpose: Calculate the number of seconds between two dates | |
| # Arguments: | |
| # $1 -> Date #1 | |
| # $2 -> Date #2 | |
| ############################################################################# | |
| date_diff() | |
| { | |
| if [ "${1}" != "" ] && [ "${2}" != "" ] | |
| then | |
| echo $((${2} - ${1})) | |
| else | |
| echo 0 | |
| fi | |
| } | |
| ##################################################################### | |
| # Purpose: Print a line with the expiraton interval | |
| # Arguments: | |
| # $1 -> Hostname | |
| # $2 -> TCP Port | |
| # $3 -> Status of certification (e.g., expired or valid) | |
| # $4 -> Date when certificate will expire | |
| # $5 -> Days left until the certificate will expire | |
| # $6 -> Issuer of the certificate | |
| ##################################################################### | |
| prints() | |
| { | |
| if [ "${QUIET}" != "TRUE" ] && [ "${ISSUER}" = "TRUE" ] && [ "${VALIDATION}" != "TRUE" ] | |
| then | |
| MIN_DATE=$(echo $4 | ${AWK} '{ print $1, $2, $4 }') | |
| if [ "${NAGIOS}" == "TRUE" ] | |
| then | |
| ${PRINTF} "%-35s %-17s %-8s %-11s %-4s %-30s\n" "$1:$2" "$6" "$3" "$MIN_DATE" \|days="$5" | |
| else | |
| ${PRINTF} "%-35s %-17s %-8s %-11s %-4s %-30s\n" "$1:$2" "$6" "$3" "$MIN_DATE" "$5" | |
| fi | |
| elif [ "${QUIET}" != "TRUE" ] && [ "${ISSUER}" = "TRUE" ] && [ "${VALIDATION}" == "TRUE" ] | |
| then | |
| ${PRINTF} "%-35s %-35s %-32s %-17s\n" "$1:$2" "$7" "$8" "$6" | |
| elif [ "${QUIET}" != "TRUE" ] && [ "${VALIDATION}" != "TRUE" ] | |
| then | |
| MIN_DATE=$(echo $4 | ${AWK} '{ print $1, $2, $4 }') | |
| if [ "${NAGIOS}" == "TRUE" ] | |
| then | |
| ${PRINTF} "%-47s %-12s %-12s %-4s %-30s\n" "$1:$2" "$3" "$MIN_DATE" \|days="$5" | |
| else | |
| ${PRINTF} "%-47s %-12s %-12s %-4s %-30s\n" "$1:$2" "$3" "$MIN_DATE" "$5" | |
| fi | |
| elif [ "${QUIET}" != "TRUE" ] && [ "${VALIDATION}" == "TRUE" ] | |
| then | |
| ${PRINTF} "%-35s %-35s %-32s\n" "$1:$2" "$7" "$8" | |
| fi | |
| } | |
| #################################################### | |
| # Purpose: Print a heading with the relevant columns | |
| # Arguments: | |
| # None | |
| #################################################### | |
| print_heading() | |
| { | |
| if [ "${NOHEADER}" != "TRUE" ] | |
| then | |
| if [ "${QUIET}" != "TRUE" ] && [ "${ISSUER}" = "TRUE" ] && [ "${NAGIOS}" != "TRUE" ] && [ "${VALIDATION}" != "TRUE" ] | |
| then | |
| ${PRINTF} "\n%-35s %-17s %-8s %-11s %-4s\n" "Host" "Issuer" "Status" "Expires" "Days" | |
| echo "----------------------------------- ----------------- -------- ----------- ----" | |
| elif [ "${QUIET}" != "TRUE" ] && [ "${ISSUER}" = "TRUE" ] && [ "${NAGIOS}" != "TRUE" ] && [ "${VALIDATION}" == "TRUE" ] | |
| then | |
| ${PRINTF} "\n%-35s %-35s %-32s %-17s\n" "Host" "Common Name" "Serial #" "Issuer" | |
| echo "----------------------------------- ----------------------------------- -------------------------------- -----------------" | |
| elif [ "${QUIET}" != "TRUE" ] && [ "${NAGIOS}" != "TRUE" ] && [ "${VALIDATION}" != "TRUE" ] | |
| then | |
| ${PRINTF} "\n%-47s %-12s %-12s %-4s\n" "Host" "Status" "Expires" "Days" | |
| echo "----------------------------------------------- ------------ ------------ ----" | |
| elif [ "${QUIET}" != "TRUE" ] && [ "${NAGIOS}" != "TRUE" ] && [ "${VALIDATION}" == "TRUE" ] | |
| then | |
| ${PRINTF} "\n%-35s %-35s %-32s\n" "Host" "Common Name" "Serial #" | |
| echo "----------------------------------- ----------------------------------- --------------------------------" | |
| fi | |
| fi | |
| } | |
| ########################################## | |
| # Purpose: Describe how the script works | |
| # Arguments: | |
| # None | |
| ########################################## | |
| usage() | |
| { | |
| echo "Usage: $0 [ -e email address ] [ -x days ] [-q] [-a] [-b] [-h] [-i] [-n] [-v]" | |
| echo " { [ -s common_name ] && [ -p port] } || { [ -f cert_file ] } || { [ -c certificate file ] }" | |
| echo "" | |
| echo " -a : Send a warning message through E-mail" | |
| echo " -b : Will not print header" | |
| echo " -c cert file : Print the expiration date for the PEM or PKCS12 formatted certificate in cert file" | |
| echo " -e E-mail address : E-mail address to send expiration notices" | |
| echo " -f cert file : File with a list of FQDNs and ports" | |
| echo " -h : Print this screen" | |
| echo " -i : Print the issuer of the certificate" | |
| echo " -k password : PKCS12 file password" | |
| echo " -n : Run as a Nagios plugin" | |
| echo " -p port : Port to connect to (interactive mode)" | |
| echo " -s commmon name : Server to connect to (interactive mode)" | |
| echo " -t type : Specify the certificate type" | |
| echo " -q : Don't print anything on the console" | |
| echo " -v : Specify a specific protocol version to use (tls, ssl2, ssl3)" | |
| echo " -V : Only print validation data" | |
| echo " -x days : Certificate expiration interval (eg. if cert_date < days)" | |
| echo "" | |
| } | |
| ########################################################################## | |
| # Purpose: Connect to a server ($1) and port ($2) to see if a certificate | |
| # has expired | |
| # Arguments: | |
| # $1 -> Server name | |
| # $2 -> TCP port to connect to | |
| ########################################################################## | |
| check_server_status() { | |
| if [ "_${2}" = "_smtp" -o "_${2}" = "_25" ] | |
| then | |
| TLSFLAG="-starttls smtp" | |
| elif [ "_${2}" = "_ftp" -o "_${2}" = "_21" ] | |
| then | |
| TLSFLAG="-starttls ftp" | |
| elif [ "_${2}" = "_pop3" -o "_${2}" = "_110" ] | |
| then | |
| TLSFLAG="-starttls pop3" | |
| elif [ "_${2}" = "_imap" -o "_${2}" = "_143" ] | |
| then | |
| TLSFLAG="-starttls imap" | |
| elif [ "_${2}" = "_submission" -o "_${2}" = "_587" ] | |
| then | |
| TLSFLAG="-starttls smtp -port ${2}" | |
| else | |
| TLSFLAG="" | |
| fi | |
| if [ "${VERSION}" != "" ] | |
| then | |
| VER="-${VERSION}" | |
| fi | |
| if [ "${TLSSERVERNAME}" = "TRUE" ] | |
| then | |
| TLSFLAG="${TLSFLAG} -servername $1" | |
| fi | |
| echo "" | ${OPENSSL} s_client ${VER} -connect ${1}:${2} ${TLSFLAG} 2> ${ERROR_TMP} 1> ${CERT_TMP} | |
| if ${GREP} -i "Connection refused" ${ERROR_TMP} > /dev/null | |
| then | |
| prints ${1} ${2} "Connection refused" "Unknown" | |
| RETCODE=3 | |
| elif ${GREP} -i "No route to host" ${ERROR_TMP} > /dev/null | |
| then | |
| prints ${1} ${2} "No route to host" "Unknown" | |
| RETCODE=3 | |
| elif ${GREP} -i "gethostbyname failure" ${ERROR_TMP} > /dev/null | |
| then | |
| prints ${1} ${2} "Cannot resolve domain" "Unknown" | |
| RETCODE=3 | |
| elif ${GREP} -i "Operation timed out" ${ERROR_TMP} > /dev/null | |
| then | |
| prints ${1} ${2} "Operation timed out" "Unknown" | |
| RETCODE=3 | |
| elif ${GREP} -i "ssl handshake failure" ${ERROR_TMP} > /dev/null | |
| then | |
| prints ${1} ${2} "SSL handshake failed" "Unknown" | |
| RETCODE=3 | |
| elif ${GREP} -i "connect: Connection timed out" ${ERROR_TMP} > /dev/null | |
| then | |
| prints ${1} ${2} "Connection timed out" "Unknown" | |
| RETCODE=3 | |
| else | |
| check_file_status ${CERT_TMP} $1 $2 | |
| fi | |
| } | |
| ##################################################### | |
| ### Check the expiration status of a certificate file | |
| ### Accepts three parameters: | |
| ### $1 -> certificate file to process | |
| ### $2 -> Server name | |
| ### $3 -> Port number of certificate | |
| ##################################################### | |
| check_file_status() { | |
| CERTFILE=${1} | |
| HOST=${2} | |
| PORT=${3} | |
| ### Check to make sure the certificate file exists | |
| if [ ! -r ${CERTFILE} ] || [ ! -s ${CERTFILE} ] | |
| then | |
| echo "ERROR: The file named ${CERTFILE} is unreadable or doesn't exist" | |
| echo "ERROR: Please check to make sure the certificate for ${HOST}:${PORT} is valid" | |
| RETCODE=1 | |
| return | |
| fi | |
| ### Grab the expiration date from the X.509 certificate | |
| if [ "${PKCSDBPASSWD}" != "" ] | |
| then | |
| # Extract the certificate from the PKCS#12 database, and | |
| # send the informational message to /dev/null | |
| ${OPENSSL} pkcs12 -nokeys -in ${CERTFILE} \ | |
| -out ${CERT_TMP} -clcerts -password pass:${PKCSDBPASSWD} 2> /dev/null | |
| # Extract the expiration date from the certificate | |
| CERTDATE=$(${OPENSSL} x509 -in ${CERT_TMP} -enddate -noout | \ | |
| ${SED} 's/notAfter\=//') | |
| # Extract the issuer from the certificate | |
| CERTISSUER=$(${OPENSSL} x509 -in ${CERT_TMP} -issuer -noout | \ | |
| ${AWK} 'BEGIN {RS="/" } $0 ~ /^O=/ \ | |
| { print substr($0,3,17)}') | |
| ### Grab the common name (CN) from the X.509 certificate | |
| COMMONNAME=$(${OPENSSL} x509 -in ${CERT_TMP} -subject -noout | \ | |
| ${SED} -e 's/.*CN=//' | \ | |
| ${SED} -e 's/\/.*//') | |
| ### Grab the serial number from the X.509 certificate | |
| SERIAL=$(${OPENSSL} x509 -in ${CERT_TMP} -serial -noout | \ | |
| ${SED} -e 's/serial=//') | |
| else | |
| # Extract the expiration date from the ceriticate | |
| CERTDATE=$(${OPENSSL} x509 -in ${CERTFILE} -enddate -noout -inform ${CERTTYPE} | \ | |
| ${SED} 's/notAfter\=//') | |
| # Extract the issuer from the certificate | |
| CERTISSUER=$(${OPENSSL} x509 -in ${CERTFILE} -issuer -noout -inform ${CERTTYPE} | \ | |
| ${AWK} 'BEGIN {RS="/" } $0 ~ /^O=/ { print substr($0,3,17)}') | |
| ### Grab the common name (CN) from the X.509 certificate | |
| COMMONNAME=$(${OPENSSL} x509 -in ${CERTFILE} -subject -noout -inform ${CERTTYPE} | \ | |
| ${SED} -e 's/.*CN=//' | \ | |
| ${SED} -e 's/\/.*//') | |
| ### Grab the serial number from the X.509 certificate | |
| SERIAL=$(${OPENSSL} x509 -in ${CERTFILE} -serial -noout -inform ${CERTTYPE} | \ | |
| ${SED} -e 's/serial=//') | |
| fi | |
| ### Split the result into parameters, and pass the relevant pieces to date2julian | |
| set -- ${CERTDATE} | |
| MONTH=$(getmonth ${1}) | |
| # Convert the date to seconds, and get the diff between NOW and the expiration date | |
| CERTJULIAN=$(date2julian ${MONTH#0} ${2#0} ${4}) | |
| CERTDIFF=$(date_diff ${NOWJULIAN} ${CERTJULIAN}) | |
| if [ ${CERTDIFF} -lt 0 ] | |
| then | |
| if [ "${ALARM}" = "TRUE" ] | |
| then | |
| echo "The SSL certificate for ${HOST}:${PORT} \"(CN: ${COMMONNAME})\" has expired!" \ | |
| | ${MAIL} -s "Certificate for ${HOST}:${PORT} \"(CN: ${COMMONNAME})\" has expired!" ${ADMIN} | |
| fi | |
| prints ${HOST} ${PORT} "Expired" "${CERTDATE}" "${CERTDIFF}" "${CERTISSUER}" "${COMMONNAME}" "${SERIAL}" | |
| RETCODE=2 | |
| elif [ ${CERTDIFF} -lt ${WARNDAYS} ] | |
| then | |
| if [ "${ALARM}" = "TRUE" ] | |
| then | |
| echo "The SSL certificate for ${HOST}:${PORT} \"(CN: ${COMMONNAME})\" will expire on ${CERTDATE}" \ | |
| | ${MAIL} -s "Certificate for ${HOST}:${PORT} \"(CN: ${COMMONNAME})\" will expire in ${WARNDAYS}-days or less" ${ADMIN} | |
| fi | |
| prints ${HOST} ${PORT} "Expiring" "${CERTDATE}" "${CERTDIFF}" "${CERTISSUER}" "${COMMONNAME}" "${SERIAL}" | |
| RETCODE=1 | |
| else | |
| prints ${HOST} ${PORT} "Valid" "${CERTDATE}" "${CERTDIFF}" "${CERTISSUER}" "${COMMONNAME}" "${SERIAL}" | |
| RETCODE=0 | |
| fi | |
| } | |
| ################################# | |
| ### Start of main program | |
| ################################# | |
| while getopts abinv:e:f:c:hk:p:s:t:qx:V option | |
| do | |
| case "${option}" | |
| in | |
| a) ALARM="TRUE";; | |
| b) NOHEADER="TRUE";; | |
| c) CERTFILE=${OPTARG};; | |
| e) ADMIN=${OPTARG};; | |
| f) SERVERFILE=$OPTARG;; | |
| h) usage | |
| exit 1;; | |
| i) ISSUER="TRUE";; | |
| k) PKCSDBPASSWD=${OPTARG};; | |
| n) NAGIOS="TRUE";; | |
| p) PORT=$OPTARG;; | |
| s) HOST=$OPTARG;; | |
| t) CERTTYPE=$OPTARG;; | |
| q) QUIET="TRUE";; | |
| v) VERSION=$OPTARG;; | |
| V) VALIDATION="TRUE";; | |
| x) WARNDAYS=$OPTARG;; | |
| \?) usage | |
| exit 1;; | |
| esac | |
| done | |
| ### Check to make sure a openssl utility is available | |
| if [ ! -f ${OPENSSL} ] | |
| then | |
| echo "ERROR: The openssl binary does not exist in ${OPENSSL}." | |
| echo "FIX: Please modify the \${OPENSSL} variable in the program header." | |
| exit 1 | |
| fi | |
| ### Check to make sure a date utility is available | |
| if [ ! -f ${DATE} ] | |
| then | |
| echo "ERROR: The date binary does not exist in ${DATE} ." | |
| echo "FIX: Please modify the \${DATE} variable in the program header." | |
| exit 1 | |
| fi | |
| ### Check to make sure a grep utility is available | |
| if [ ! -f ${GREP} ] | |
| then | |
| echo "ERROR: The grep binary does not exist in ${GREP} ." | |
| echo "FIX: Please modify the \${GREP} variable in the program header." | |
| exit 1 | |
| fi | |
| ### Check to make sure the mktemp and printf utilities are available | |
| if [ ! -f ${MKTEMP} ] || [ ! -f ${PRINTF} ] | |
| then | |
| echo "ERROR: Unable to locate the mktemp or printf binary." | |
| echo "FIX: Please modify the \${MKTEMP} and \${PRINTF} variables in the program header." | |
| exit 1 | |
| fi | |
| ### Check to make sure the sed and awk binaries are available | |
| if [ ! -f ${SED} ] || [ ! -f ${AWK} ] | |
| then | |
| echo "ERROR: Unable to locate the sed or awk binary." | |
| echo "FIX: Please modify the \${SED} and \${AWK} variables in the program header." | |
| exit 1 | |
| fi | |
| ### Check to make sure a mail client is available it automated notifications are requested | |
| if [ "${ALARM}" = "TRUE" ] && [ ! -f ${MAIL} ] | |
| then | |
| echo "ERROR: You enabled automated alerts, but the mail binary could not be found." | |
| echo "FIX: Please modify the ${MAIL} variable in the program header." | |
| exit 1 | |
| fi | |
| # Place to stash temporary files | |
| CERT_TMP=$($MKTEMP /var/tmp/cert.XXXXXX) | |
| ERROR_TMP=$($MKTEMP /var/tmp/error.XXXXXX) | |
| ### Baseline the dates so we have something to compare to | |
| MONTH=$(${DATE} "+%m") | |
| DAY=$(${DATE} "+%d") | |
| YEAR=$(${DATE} "+%Y") | |
| NOWJULIAN=$(date2julian ${MONTH#0} ${DAY#0} ${YEAR}) | |
| ### Touch the files prior to using them | |
| if [ ! -z "${CERT_TMP}" ] && [ ! -z "${ERROR_TMP}" ] | |
| then | |
| touch ${CERT_TMP} ${ERROR_TMP} | |
| else | |
| echo "ERROR: Problem creating temporary files" | |
| echo "FIX: Check that mktemp works on your system" | |
| exit 1 | |
| fi | |
| ### If a HOST and PORT were passed on the cmdline, use those values | |
| if [ "${HOST}" != "" ] && [ "${PORT}" != "" ] | |
| then | |
| print_heading | |
| check_server_status "${HOST}" "${PORT}" | |
| ### If a file is passed to the "-f" option on the command line, check | |
| ### each certificate or server / port combination in the file to see if | |
| ### they are about to expire | |
| elif [ -f "${SERVERFILE}" ] | |
| then | |
| print_heading | |
| egrep -v '(^#|^$)' ${SERVERFILE} | while read HOST PORT | |
| do | |
| if [ "$PORT" = "FILE" ] | |
| then | |
| check_file_status ${HOST} "FILE" "${HOST}" | |
| else | |
| check_server_status "${HOST}" "${PORT}" | |
| fi | |
| done | |
| ### Check to see if the certificate in CERTFILE is about to expire | |
| elif [ "${CERTFILE}" != "" ] | |
| then | |
| print_heading | |
| check_file_status ${CERTFILE} $HOSTNAME "${CERTFILE}" | |
| ### There was an error, so print a detailed usage message and exit | |
| else | |
| usage | |
| exit 1 | |
| fi | |
| ### Remove the temporary files | |
| rm -f ${CERT_TMP} ${ERROR_TMP} | |
| ### Exit with a success indicator | |
| if [ "${NAGIOS}" = "TRUE" ]; then | |
| exit $RETCODE | |
| else | |
| exit 0 | |
| fi |
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