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check_ssl_cert
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#!/bin/sh
#
# check_ssl_cert
#
# Checks an X.509 certificate:
# - checks if the server is running and delivers a valid certificate
# - checks if the CA matches a given pattern
# - checks the validity
#
# See the INSTALL file for installation instructions
#
# Copyright (c) 2007-2012 ETH Zurich.
# Copyright (c) 2007-2018 Matteo Corti <[email protected]>
#
# This module is free software; you can redistribute it and/or modify it
# under the terms of GNU general public license (gpl) version 3.
# See the LICENSE file for details.
################################################################################
# Constants
VERSION=1.68.0
SHORTNAME="SSL_CERT"
VALID_ATTRIBUTES=",startdate,enddate,subject,issuer,serial,modulus,serial,hash,email,ocsp_uri,fingerprint,"
################################################################################
# Functions
################################################################################
# Prints usage information
# Params
# $1 error message (optional)
usage() {
if [ -n "$1" ] ; then
echo "Error: $1" 1>&2
fi
#### The following line is 80 characters long (helps to fit the help text in a standard terminal)
######--------------------------------------------------------------------------------
echo
echo "Usage: check_ssl_cert -H host [OPTIONS]"
echo
echo "Arguments:"
echo " -H,--host host server"
echo
echo "Options:"
echo " -A,--noauth ignore authority warnings (expiration only)"
echo " --altnames matches the pattern specified in -n with alternate"
echo " names too"
echo " -C,--clientcert path use client certificate to authenticate"
echo " --clientpass phrase set passphrase for client certificate."
echo " -c,--critical days minimum number of days a certificate has to be valid"
echo " to issue a critical status"
echo " --curl-bin path path of the curl binary to be used"
echo " -d,--debug produces debugging output"
echo " --ecdsa cipher selection: force ECDSA authentication"
echo " -e,--email address pattern to match the email address contained in the"
echo " certificate"
echo " -f,--file file local file path (works with -H localhost only)"
echo " with -f you can not only pass a x509 certificate file"
echo " but also a certificate revocation list (CRL) to check"
echo " the validity period"
echo " --file-bin path path of the file binary to be used"
echo " --fingerprint SHA1 pattern to match the SHA1-Fingerprint"
echo " --force-perl-date force the usage of Perl for date computations"
echo " --format FORMAT format output template on success, for example"
echo " \"%SHORTNAME% OK %CN% from '%CA_ISSUER_MATCHED%'\""
echo " -h,--help,-? this help message"
echo " --ignore-exp ignore expiration date"
echo " --ignore-ocsp do not check revocation with OCSP"
echo " --ignore-sig-alg do not check if the certificate was signed with SHA1"
echo " or MD5"
echo " --ignore-ssl-labs-cache Forces a new check by SSL Labs (see -L)"
echo " -i,--issuer issuer pattern to match the issuer of the certificate"
echo " --issuer-cert-cache dir directory where to store issuer certificates cache"
echo " -L,--check-ssl-labs grade SSL Labs assessment"
echo " (please check https://www.ssllabs.com/about/terms.html)"
echo " --long-output list append the specified comma separated (no spaces) list"
echo " of attributes to the plugin output on additional lines"
echo " Valid attributes are:"
echo " enddate, startdate, subject, issuer, modulus,"
echo " serial, hash, email, ocsp_uri and fingerprint."
echo " 'all' will include all the available attributes."
echo " -n,--cn name pattern to match the CN of the certificate (can be"
echo " specified multiple times)"
echo " --no_ssl2 disable SSL version 2"
echo " --no_ssl3 disable SSL version 3"
echo " --no_tls1 disable TLS version 1"
echo " --no_tls1_1 disable TLS version 1.1"
echo " --no_tls1_2 disable TLS version 1.2"
echo " -N,--host-cn match CN with the host name"
echo " -o,--org org pattern to match the organization of the certificate"
echo " --openssl path path of the openssl binary to be used"
echo " -p,--port port TCP port"
echo " -P,--protocol protocol use the specific protocol"
echo " {http|smtp|pop3|imap|ftp|xmpp|irc|ldap}"
echo " http: default"
echo " smtp,pop3,imap,ftp,ldap: switch to TLS"
echo " -s,--selfsigned allows self-signed certificates"
echo " --serial serialnum pattern to match the serial number"
echo " --sni name sets the TLS SNI (Server Name Indication) extension"
echo " in the ClientHello message to 'name'"
echo " --ssl2 forces SSL version 2"
echo " --ssl3 forces SSL version 3"
echo " --require-san require the presence of a Subject Alternative Name"
echo " extension"
echo " -r,--rootcert path root certificate or directory to be used for"
echo " certificate validation"
echo " --rsa cipher selection: force RSA authentication"
echo " --temp dir directory where to store the temporary files"
echo " --terse terse output"
echo " -t,--timeout seconds timeout after the specified time"
echo " (defaults to 15 seconds)"
echo " --tls1 force TLS version 1"
echo " --tls1_1 force TLS version 1.1"
echo " --tls1_2 force TLS version 1.2"
echo " --tls1_3 force TLS version 1.3"
echo " -v,--verbose verbose output"
echo " -V,--version version"
echo " -w,--warning days minimum number of days a certificate has to be valid"
echo " to issue a warning status"
echo " --xmpphost name specifies the host for the 'to' attribute of the stream element"
echo
echo "Deprecated options:"
echo " --days days minimum number of days a certificate has to be valid"
echo " (see --critical and --warning)"
echo " --ocsp check revocation via OCSP"
echo " -S,--ssl version force SSL version (2,3)"
echo " (see: --ssl2 or --ssl3)"
echo
echo "Report bugs to https://github.com/matteocorti/check_ssl_cert/issues"
echo
exit 3
}
################################################################################
# Exits with a critical message
# Params
# $1 error message
critical() {
if [ -n "${HOST}" ] ; then
tmp=" ${HOST}"
fi
printf '%s CRITICAL%s: %s%s%s\n' "${SHORTNAME}" "${tmp}" "$1" "${PERFORMANCE_DATA}" "${LONG_OUTPUT}"
exit 2
}
################################################################################
# Exits with a warning message
# Param
# $1 warning message
warning() {
if [ -n "${HOST}" ] ; then
tmp=" ${HOST}"
fi
printf '%s WARN%s: %s%s%s\n' "${SHORTNAME}" "${tmp}" "$1" "${PERFORMANCE_DATA}" "${LONG_OUTPUT}"
exit 1
}
################################################################################
# Exits with an 'unknown' status
# Param
# $1 message
unknown() {
if [ -n "${HOST}" ] ; then
tmp=" ${HOST}"
fi
printf '%s UNKNOWN%s: %s\n' "${SHORTNAME}" "${tmp}" "$1"
exit 3
}
################################################################################
# Executes command with a timeout
# Params:
# $1 timeout in seconds
# $2 command
# Returns 1 if timed out 0 otherwise
exec_with_timeout() {
time=$1
# start the command in a subshell to avoid problem with pipes
# (spawn accepts one command)
command="/bin/sh -c \"$2\""
if [ -n "${DEBUG}" ] ; then
echo "[DBG] executing with timeout (${time}s): $2"
fi
if [ -n "${TIMEOUT_BIN}" ] ; then
if [ -n "${DEBUG}" ] ; then
echo "[DBG] ${TIMEOUT_BIN} $time $command"
fi
eval "${TIMEOUT_BIN} $time $command" > /dev/null 2>&1
if [ $? = 137 ] ; then
critical "Timeout after ${time} seconds"
fi
elif [ -n "${EXPECT}" ] ; then
expect -c "set echo \"-noecho\"; set timeout $time; spawn -noecho $command; expect timeout { exit 1 } eof { exit 0 }"
if [ $? = 1 ] ; then
critical "Timeout after ${time} seconds"
fi
else
eval "${command}"
fi
}
################################################################################
# Checks if a given program is available and executable
# Params
# $1 program name
# Returns 1 if the program exists and is executable
check_required_prog() {
PROG=$(command -v "$1" 2> /dev/null)
if [ -z "$PROG" ] ; then
critical "cannot find program: $1"
fi
if [ ! -x "$PROG" ] ; then
critical "$PROG is not executable"
fi
}
################################################################################
# Converts SSL Labs grades to a numeric value
# (see https://www.ssllabs.com/downloads/SSL_Server_Rating_Guide.pdf)
# Params
# $1 program name
# Sets NUMERIC_SSL_LAB_GRADE
convert_ssl_lab_grade() {
GRADE="$1"
unset NUMERIC_SSL_LAB_GRADE
case "${GRADE}" in
'A+'|'a+')
# Value not in documentation
NUMERIC_SSL_LAB_GRADE=85
shift
;;
A|a)
NUMERIC_SSL_LAB_GRADE=80
shift
;;
'A-'|'a-')
# Value not in documentation
NUMERIC_SSL_LAB_GRADE=75
shift
;;
B|b)
NUMERIC_SSL_LAB_GRADE=65
shift
;;
C|c)
NUMERIC_SSL_LAB_GRADE=50
shift
;;
D|d)
NUMERIC_SSL_LAB_GRADE=35
shift
;;
E|e)
NUMERIC_SSL_LAB_GRADE=20
shift
;;
F|f)
NUMERIC_SSL_LAB_GRADE=0
shift
;;
T|t)
# No trust: value not in documentation
NUMERIC_SSL_LAB_GRADE=0
shift
;;
M|m)
# Certificate name mismatch: value not in documentation
NUMERIC_SSL_LAB_GRADE=0
shift
;;
*)
unknown "Connot convert SSL Lab grade ${GRADE}"
;;
esac
}
################################################################################
# Tries to fetch the certificate
fetch_certificate() {
RET=0
# IPv6 addresses need brackets in a URI
if [ "${HOST}" != "${HOST#*[0-9].[0-9]}" ]; then
if [ -n "${DEBUG}" ] ; then
echo "[DBG] ${HOST} is an IPv4 address"
fi
elif [ "${HOST}" != "${HOST#*:[0-9a-fA-F]}" ]; then
if [ -n "${DEBUG}" ] ; then
echo "[DBG] ${HOST} is an IPv6 address"
fi
if [ -z "${HOST##*[*}" ] ; then
if [ -n "${DEBUG}" ] ; then
echo "[DBG] ${HOST} is already specified with brakcets"
fi
else
if [ -n "${DEBUG}" ] ; then
echo "[DBG] adding brackets to ${HOST}"
fi
HOST="[${HOST}]"
fi
else
if [ -n "${DEBUG}" ] ; then
echo "[DBG] ${HOST} is not an IP address"
fi
fi
# Check if a protocol was specified (if not HTTP switch to TLS)
if [ -n "${PROTOCOL}" ] && [ "${PROTOCOL}" != "http" ] && [ "${PROTOCOL}" != "https" ] ; then
case "${PROTOCOL}" in
smtp)
exec_with_timeout "$TIMEOUT" "echo -e 'QUIT\\r' | $OPENSSL s_client ${CLIENT} ${CLIENTPASS} -starttls ${PROTOCOL} -connect $HOST:$PORT ${SERVERNAME} -verify 6 ${ROOT_CA} ${SSL_VERSION} ${SSL_VERSION_DISABLED} ${SSL_AU} 2> ${ERROR} 1> ${CERT}"
RET=$?
;;
irc)
exec_with_timeout "$TIMEOUT" "echo -e 'QUIT\\r' | $OPENSSL s_client ${CLIENT} ${CLIENTPASS} -connect $HOST:$PORT ${SERVERNAME} -verify 6 ${ROOT_CA} ${SSL_VERSION} ${SSL_VERSION_DISABLED} ${SSL_AU} 2> ${ERROR} 1> ${CERT}"
RET=$?
;;
pop3|imap|ftp|ldap)
exec_with_timeout "$TIMEOUT" "echo 'Q' | $OPENSSL s_client ${CLIENT} ${CLIENTPASS} -starttls ${PROTOCOL} -connect $HOST:$PORT ${SERVERNAME} -verify 6 ${ROOT_CA} ${SSL_VERSION} ${SSL_VERSION_DISABLED} ${SSL_AU} 2> ${ERROR} 1> ${CERT}"
RET=$?
;;
xmpp)
exec_with_timeout "$TIMEOUT" "echo 'Q' | $OPENSSL s_client ${CLIENT} ${CLIENTPASS} -starttls ${PROTOCOL} -connect $HOST:$XMPPPORT ${XMPPHOST} -verify 6 ${ROOT_CA} ${SSL_VERSION} ${SSL_VERSION_DISABLED} ${SSL_AU} 2> ${ERROR} 1> ${CERT}"
RET=$?
;;
*)
unknown "Error: unsupported protocol ${PROTOCOL}"
;;
esac
elif [ -n "${FILE}" ] ; then
if [ "${HOST}" = "localhost" ] ; then
exec_with_timeout "$TIMEOUT" "/bin/cat '${FILE}' 2> ${ERROR} 1> ${CERT}"
RET=$?
else
unknown "Error: option 'file' works with -H localhost only"
fi
else
exec_with_timeout "$TIMEOUT" "echo 'Q' | $OPENSSL s_client ${CLIENT} ${CLIENTPASS} -connect $HOST:$PORT ${SERVERNAME} -verify 6 ${ROOT_CA} ${SSL_VERSION} ${SSL_VERSION_DISABLED} ${SSL_AU} 2> ${ERROR} 1> ${CERT}"
RET=$?
fi
if [ -n "${DEBUG}" ] ; then
echo "[DBG] storing a copy of the retrieved certificate in ${HOST}.crt"
cp "${CERT}" "${HOST}.crt"
echo "[DBG] storing a copy of the OpenSSL errors in ${HOST}.error"
cp "${ERROR}" "${HOST}.error"
fi
if [ "${RET}" -ne 0 ] ; then
if [ -n "${DEBUG}" ] ; then
sed 's/^/[DBG] SSL error: /' "${ERROR}"
fi
# s_client could verify the server certificate because the server requires a client certificate
if grep -q '^Acceptable client certificate CA names' "${CERT}" ; then
if [ -n "${VERBOSE}" ] ; then
echo "The server requires a client certificate"
fi
else
# Try to clean up the error message
# Remove the 'verify and depth' lines
# Take the 1st line (seems OK with the use cases I tested)
ERROR_MESSAGE=$(
grep -v '^depth' "${ERROR}" \
| grep -v '^verify' \
| head -n 1
)
critical "SSL error: ${ERROR_MESSAGE}"
fi
fi
}
################################################################################
# Adds metric to performance data
# Params
# $1 performance data in nagios plugin format,
# see https://nagios-plugins.org/doc/guidelines.html#AEN200
add_performance_data() {
if [ -z "${PERFORMANCE_DATA}" ]; then
PERFORMANCE_DATA="|${1}"
else
PERFORMANCE_DATA="${PERFORMANCE_DATA} $1"
fi
}
################################################################################
# Prepares sed-style command for variable replacement
# Params
# $1 variable name (e.g. SHORTNAME)
# $2 variable value (e.g. SSL_CERT)
var_for_sed() {
echo "s|%$1%|$( echo "$2" | sed -e 's#|#\\\\|#g' )|g"
}
################################################################################
# Main
################################################################################
main() {
# Default values
DEBUG=""
OPENSSL=""
FILE_BIN=""
CURL_BIN=""
IGNORE_SSL_LABS_CACHE=""
PORT="443"
XMPPPORT="5222"
XMPPHOST=""
SNI=""
TIMEOUT="15"
VERBOSE=""
FORCE_PERL_DATE=""
REQUIRE_SAN=""
OCSP="1" # enabled by default
FORMAT=""
# Set the default temp dir if not set
if [ -z "${TMPDIR}" ] ; then
TMPDIR="/tmp"
fi
################################################################################
# Process command line options
#
# We do no use getopts since it is unable to process long options
while true; do
case "$1" in
########################################
# Options without arguments
-A|--noauth)
NOAUTH=1
shift
;;
--altnames)
ALTNAMES=1
shift
;;
-d|--debug)
DEBUG=1
VERBOSE=1
shift
;;
-h|--help|-\?)
usage
exit 0
;;
--force-perl-date)
FORCE_PERL_DATE=1
shift
;;
--ignore-exp)
NOEXP=1
shift
;;
--ignore-sig-alg)
NOSIGALG=1
shift
;;
--ignore-ssl-labs-cache)
IGNORE_SSL_LABS_CACHE="&startNew=on"
shift
;;
--no_ssl2)
SSL_VERSION_DISABLED="${SSL_VERSION_DISABLED} -no_ssl2"
shift
;;
--no_ssl3)
SSL_VERSION_DISABLED="${SSL_VERSION_DISABLED} -no_ssl3"
shift
;;
--no_tls1)
SSL_VERSION_DISABLED="${SSL_VERSION_DISABLED} -no_tls1"
shift
;;
--no_tls1_1)
SSL_VERSION_DISABLED="${SSL_VERSION_DISABLED} -no_tls1_1"
shift
;;
--no_tls1_2)
SSL_VERSION_DISABLED="${SSL_VERSION_DISABLED} -no_tls1_2"
shift
;;
-N|--host-cn)
COMMON_NAME="__HOST__"
shift
;;
-s|--selfsigned)
SELFSIGNED=1
shift
;;
--rsa)
SSL_AU="-cipher aRSA"
shift
;;
--ecdsa)
SSL_AU="-cipher aECDSA"
shift
;;
--ssl2)
SSL_VERSION="-ssl2"
shift
;;
--ssl3)
SSL_VERSION="-ssl3"
shift
;;
--tls1)
SSL_VERSION="-tls1"
shift
;;
--tls1_1)
SSL_VERSION="-tls1_1"
shift
;;
--tls1_2)
SSL_VERSION="-tls1_2"
shift
;;
--tls1_3)
SSL_VERSION="-tls1_3"
shift
;;
--ocsp)
# deprecated
shift
;;
--ignore-ocsp)
OCSP=""
shift
;;
--terse)
TERSE=1
shift
;;
-v|--verbose)
VERBOSE=1
shift
;;
-V|--version)
echo "check_ssl_cert version ${VERSION}"
exit 3
;;
########################################
# Options with arguments
-c|--critical)
if [ $# -gt 1 ]; then
CRITICAL="$2"
shift 2
else
unknown "-c,--critical requires an argument"
fi
;;
--curl-bin)
if [ $# -gt 1 ]; then
CURL_BIN="$2"
shift 2
else
unknown "--curl-bin requires an argument"
fi
;;
# Deprecated option: used to be as --warning
--days)
if [ $# -gt 1 ]; then
WARNING="$2"
shift 2
else
unknown "-d,--days requires an argument"
fi
;;
-e|--email)
if [ $# -gt 1 ]; then
ADDR="$2"
shift 2
else
unknown "-e,--email requires an argument"
fi
;;
-f|--file)
if [ $# -gt 1 ]; then
FILE="$2"
shift 2
else
unknown "-f,--file requires an argument"
fi
;;
--file-bin)
if [ $# -gt 1 ]; then
FILE_BIN="$2"
shift 2
else
unknown "--file-bin requires an argument"
fi
;;
--format)
if [ $# -gt 1 ]; then
FORMAT="$2"
shift 2
else
unknown "-format requires an argument"
fi
;;
-H|--host)
if [ $# -gt 1 ]; then
HOST="$2"
shift 2
else
unknown "-H,--host requires an argument"
fi
;;
-i|--issuer)
if [ $# -gt 1 ]; then
ISSUER="$2"
shift 2
else
unknown "-i,--issuer requires an argument"s
fi
;;
--issuer-cert-cache)
if [ $# -gt 1 ]; then
ISSUER_CERT_CACHE="$2"
shift 2
else
unknown "--issuer-cert-cache requires an argument"
fi
;;
-L|--check-ssl-labs)
if [ $# -gt 1 ]; then
SSL_LAB_ASSESSMENT="$2"
shift 2
else
unknown "-L|--check-ssl-labs requires an argument"
fi
;;
--serial)
if [ $# -gt 1 ]; then
SERIAL_LOCK="$2"
shift 2
else
unknown "--serial requires an argument"
fi
;;
--fingerprint)
if [ $# -gt 1 ]; then
FINGERPRINT_LOCK="$2"
shift 2
else
unknown "--fingerprint requires an argument - SHA1 Fingerprint"
fi
;;
--long-output)
if [ $# -gt 1 ]; then
LONG_OUTPUT_ATTR="$2"
shift 2
else
unknown "--long-output requires an argument"
fi
;;
-n|--cn)
if [ $# -gt 1 ]; then
if [ -n "${COMMON_NAME}" ]; then
COMMON_NAME="${COMMON_NAME} ${2}"
else
COMMON_NAME="${2}"
fi
shift 2
else
unknown "-n,--cn requires an argument"
fi
;;
-o|--org)
if [ $# -gt 1 ]; then
ORGANIZATION="$2"
shift 2
else
unknown "-o,--org requires an argument"
fi
;;
--openssl)
if [ $# -gt 1 ]; then
OPENSSL="$2"
shift 2
else
unknown "--openssl requires an argument"
fi
;;
-p|--port)
if [ $# -gt 1 ]; then
PORT="$2"
XMPPPORT="$2"
shift 2
else
unknown "-p,--port requires an argument"
fi
;;
-P|--protocol)
if [ $# -gt 1 ]; then
PROTOCOL="$2"
shift 2
else
unknown "-P,--protocol requires an argument"
fi
;;
-r|--rootcert)
if [ $# -gt 1 ]; then
ROOT_CA="$2"
shift 2
else
unknown "-r,--rootcert requires an argument"
fi
;;
-C|--clientcert)
if [ $# -gt 1 ]; then
CLIENT_CERT="$2"
shift 2
else
unknown "-c,--clientcert requires an argument"
fi
;;
--clientpass)
if [ $# -gt 1 ]; then
CLIENT_PASS="$2"
shift 2
else
unknown "--clientpass requires an argument"
fi
;;
--require-san)
REQUIRE_SAN=1
shift
;;
--sni)
if [ $# -gt 1 ]; then
SNI="$2"
shift 2
else
unknown "--sni requires an argument"
fi
;;
-S|--ssl)
if [ $# -gt 1 ]; then
if [ "$2" = "2" ] || [ "$2" = "3" ] ; then
SSL_VERSION="-ssl${2}"
shift 2
else
unknown "invalid argument for --ssl"
fi
else
unknown "--ssl requires an argument"
fi
;;
-t|--timeout)
if [ $# -gt 1 ]; then
TIMEOUT="$2"
shift 2
else
unknown "-t,--timeout requires an argument"
fi
;;
--temp)
if [ $# -gt 1 ] ; then
# Override TMPDIR
TMPDIR="$2"
shift 2
else
unknown "--temp requires an argument"
fi
;;
-w|--warning)
if [ $# -gt 1 ]; then
WARNING="$2"
shift 2
else
unknown "-w,--warning requires an argument"
fi
;;
--xmpphost)
if [ $# -gt 1 ]; then
XMPPHOST="$2"
shift 2
else
unknown "--xmpphost requires an argument"
fi
;;
########################################
# Special
--)
shift
break
;;
-*)
unknown "invalid option: ${1}"
;;
*)
if [ -n "$1" ] ; then
unknown "invalid option: ${1}"
fi
break
;;
esac
done
################################################################################
# Set COMMON_NAME to hostname if -N was given as argument
if [ "$COMMON_NAME" = "__HOST__" ] ; then
COMMON_NAME="${HOST}"
fi
################################################################################
# Sanity checks
###############
# Check options
if [ -z "${HOST}" ] ; then
usage "No host specified"
fi
if [ -n "${ALTNAMES}" ] && [ -z "${COMMON_NAME}" ] ; then
unknown "--altnames requires a common name to match (--cn or --host-cn)"
fi
if [ -n "${ROOT_CA}" ] ; then
if [ ! -r "${ROOT_CA}" ] ; then
unknown "Cannot read root certificate ${ROOT_CA}"
fi
if [ -d "${ROOT_CA}" ] ; then
ROOT_CA="-CApath ${ROOT_CA}"
elif [ -f "${ROOT_CA}" ] ; then
ROOT_CA="-CAfile ${ROOT_CA}"
else
unknown "Root certificate of unknown type $(file "${ROOT_CA}" 2> /dev/null)"
fi
fi
if [ -n "${CLIENT_CERT}" ] ; then
if [ ! -r "${CLIENT_CERT}" ] ; then
unknown "Cannot read client certificate ${CLIENT_CERT}"
fi
fi
if [ -n "${CRITICAL}" ] ; then
if ! echo "${CRITICAL}" | grep -q '[0-9][0-9]*' ; then
unknown "invalid number of days ${CRITICAL}"
fi
fi
if [ -n "${WARNING}" ] ; then
if ! echo "${WARNING}" | grep -q '[0-9][0-9]*' ; then
unknown "invalid number of days ${WARNING}"
fi
fi
if [ -n "${CRITICAL}" ] && [ -n "${WARNING}" ] ; then
if [ "${WARNING}" -le "${CRITICAL}" ] ; then
unknown "--warning (${WARNING}) is less than or equal to --critical (${CRITICAL})"
fi
fi
if [ -n "${TMPDIR}" ] ; then
if [ ! -d "${TMPDIR}" ] ; then
unknown "${TMPDIR} is not a directory";
fi
if [ ! -w "${TMPDIR}" ] ; then
unknown "${TMPDIR} is not writable";
fi
fi
if [ -n "${OPENSSL}" ] ; then
if [ ! -x "${OPENSSL}" ] ; then
unknown "${OPENSSL} ist not an executable"
fi
#if ! "${OPENSSL}" list-standard-commands | grep -q s_client ; then
# unknown "${OPENSSL} ist not an openssl executable"
#fi
fi
if [ -n "${SSL_LAB_ASSESSMENT}" ] ; then
convert_ssl_lab_grade "${SSL_LAB_ASSESSMENT}"
SSL_LAB_ASSESSMENT_NUMERIC="${NUMERIC_SSL_LAB_GRADE}"
fi
if [ -n "${DEBUG}" ] ; then
echo "[DBG] ROOT_CA = ${ROOT_CA}"
fi
#######################
# Check needed programs
# OpenSSL
if [ -z "${OPENSSL}" ] ; then
check_required_prog openssl
OPENSSL=$PROG
fi
# file
if [ -z "${FILE_BIN}" ] ; then
check_required_prog file
FILE_BIN=$PROG
fi
# curl
if [ -z "${CURL_BIN}" ] ; then
if [ -n "${SSL_LAB_ASSESSMENT}" ] || [ -n "${OCSP}" ] ; then
if [ -n "${DEBUG}" ] ; then
echo "[DBG] cURL binary needed. SSL Labs = ${SSL_LAB_ASSESSMENT}, OCSP = ${OCSP}"
echo "[DBG] cURL binary not specified"
fi
check_required_prog curl
CURL_BIN=$PROG
if [ -n "${DEBUG}" ] ; then
echo "[DBG] cURL available: ${CURL_BIN}"
fi
else
if [ -n "${DEBUG}" ] ; then
echo "[DBG] cURL binary not needed. SSL Labs = ${SSL_LAB_ASSESSMENT}, OCSP = ${OCSP}"
fi
fi
fi
# Expect (optional)
EXPECT="$(command -v expect 2> /dev/null)"
test -x "${EXPECT}" || EXPECT=""
if [ -n "${VERBOSE}" ] ; then
if [ -z "${EXPECT}" ] ; then
echo "expect not available"
else
echo "expect available (${EXPECT})"
fi
fi
# Timeout (optional)