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#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2013, Michael Boelen
# Copyright 2007-2019, CISOfy
#
# Website : https://cisofy.com
# Blog : http://linux-audit.com
# GitHub : https://github.com/CISOfy/lynis
#
# Lynis comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
# welcome to redistribute it under the terms of the GNU General Public License.
# See LICENSE file for usage of this software.
#
#################################################################################
#
# Cryptography
#
#################################################################################
#
InsertSection "Cryptography"
#
#################################################################################
#
# Test : CRYP-7902
# Description : check for expired SSL certificates
if [ ! -z "${OPENSSLBINARY}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no CRYP-7902 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check expire date of SSL certificates"
if [ ${SKIPTEST} -eq 0 ]; then
COUNT_EXPIRED=0
COUNT_TOTAL=0
FOUNDPROBLEM=0
sSSL_PATHS=$(echo ${SSL_CERTIFICATE_PATHS} | ${SEDBINARY} 's/:/ /g')
sSSL_PATHS=$(echo ${sSSL_PATHS} | ${SEDBINARY} 's/^ //' | ${TRBINARY} " " "\n" | ${SORTBINARY} | uniq | ${TRBINARY} "\n" " ")
LogText "Paths to scan: ${sSSL_PATHS}"
for DIR in ${sSSL_PATHS}; do
COUNT_DIR=0
if [ -d ${DIR} ]; then
FileIsReadable ${DIR}
if [ ${CANREAD} -eq 1 ]; then
LogText "Result: found directory ${DIR}"
# Search for certificate files
FILES=$(${FINDBINARY} ${DIR} -type f 2> /dev/null | ${EGREPBINARY} ".crt$|.pem$|^cert" | ${SORTBINARY} | ${SEDBINARY} 's/ /:space:/g')
for FILE in ${FILES}; do
FILE=$(echo ${FILE} |${SEDBINARY} 's/:space:/ /g')
COUNT_DIR=$((COUNT_DIR + 1))
FileIsReadable "${FILE}"
if [ ${CANREAD} -eq 1 ]; then
# Only check the files that are not installed by a package
if ! FileInstalledByPackage "${FILE}"; then
LogText "Test: test if file is a certificate"
OUTPUT=$(${GREPBINARY} -q 'BEGIN CERT' "${FILE}")
if [ $? -eq 0 ]; then
LogText "Result: file is a certificate"
LogText "Test: checking certificate details"
FIND=$(${OPENSSLBINARY} x509 -noout -in "${FILE}" -enddate 2> /dev/null | ${GREPBINARY} "^notAfter")
if [ $? -eq 0 ]; then
# Check certificate where 'end date' has been expired
FIND=$(${OPENSSLBINARY} x509 -noout -checkend 0 -in "${FILE}" -enddate 2> /dev/null)
EXIT_CODE=$?
CERT_CN=$(${OPENSSLBINARY} x509 -noout -subject -in "${FILE}" 2> /dev/null | ${SEDBINARY} -e 's/^subject.*CN=\([a-zA-Z0-9\.\-\*]*\).*$/\1/')
CERT_NOTAFTER=$(${OPENSSLBINARY} x509 -noout -enddate -in "${FILE}" 2> /dev/null | ${AWKBINARY} -F= '{if ($1=="notAfter") { print $2 }}')
Report "certificate[]=${FILE}|${EXIT_CODE}|cn:${CERT_CN};notafter:${CERT_NOTAFTER};|"
if [ ${EXIT_CODE} -eq 0 ]; then
LogText "Result: certificate ${FILE} seems to be correct and still valid"
else
FOUNDPROBLEM=1
COUNT_EXPIRED=$((COUNT_EXPIRED + 1))
LogText "Result: certificate ${FILE} has been expired"
fi
else
LogText "Result: skipping tests for this file (${FILE}) as it is most likely not a certificate (a key file?)"
fi
else
LogText "Result: skipping test for this file (${FILE}) as we could not find 'BEGIN CERT'"
fi
fi
else
LogText "Result: can not read file ${FILE} (no permission)"
fi
done
COUNT_TOTAL=$((COUNT_TOTAL + COUNT_DIR))
LogText "Result: found ${COUNT_DIR} certificates in ${DIR}"
else
LogText "Result: can not read path ${DIR} (no permission)"
fi
else
LogText "Result: SSL path ${DIR} does not exist"
fi
done
Report "certificates=${COUNT_TOTAL}"
LogText "Result: found a total of ${COUNT_TOTAL} certificates"
if [ ${FOUNDPROBLEM} -eq 0 ]; then
Display --indent 2 --text "- Checking for expired SSL certificates [${COUNT_EXPIRED}/${COUNT_TOTAL}]" --result "${STATUS_NONE}" --color GREEN
else
Display --indent 2 --text "- Checking for expired SSL certificates [${COUNT_EXPIRED}/${COUNT_TOTAL}]" --result "${STATUS_FOUND}" --color RED
ReportSuggestion ${TEST_NO} "Check available certificates for expiration"
fi
fi
#
#################################################################################
#
WaitForKeyPress
#
#================================================================================
# Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com
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