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  • cm.sh 23.67 KiB
    #!/usr/bin/env bash
    # ======================================================================
    #
    # WRAPPER FOR ACME.SH 
    # Let's Encrypt client
    #
    # requires
    # - bash
    # - openssl
    # - curl
    # - dig (opional)
    # - acme.sh client
    #
    # ----------------------------------------------------------------------
    # 2021-02-02  <axel.hahn@iml.unibe.ch>  first lines
    # 2021-02-10  <axel.hahn@iml.unibe.ch>  compare hashes, logging
    # 2021-02-12  <axel.hahn@iml.unibe.ch>  added self test
    # 2021-02-17  <axel.hahn@iml.unibe.ch>  ensure checks list of aliases; new: optional host filter before adding a cert
    # 2021-03-12  <axel.hahn@iml.unibe.ch>  create file for haproxy
    # 2021-03-22  <axel.hahn@iml.unibe.ch>  for haproxy: use chained cert instead of server cert
    # 2021-04-12  <axel.hahn@iml.unibe.ch>  reject multiple usage of fqdn in cli params
    # 2021-04-12  <axel.hahn@iml.unibe.ch>  optional: force excecution with a given user only
    # 2021-06-24  <axel.hahn@iml.unibe.ch>  added transfer command; delete files if acme.sh --install-cert ... failes
    # 2021-07-14  <axel.hahn@iml.unibe.ch>  added _wait_for_free_slot in cert actions to execute multiple processes sequentially
    # 2021-09-27  <axel.hahn@iml.unibe.ch>  softer behaviour: do not revoke changed certs (add does not stop; ensure does not delete)
    # 2021-12-23  <axel.hahn@iml.unibe.ch>  added param --trace as 1st param to generate a trace log 
    # 2022-01-10  <axel.hahn@iml.unibe.ch>  _wait_for_free_slot: exclude ssh calls 
    # 2022-03-30  <axel.hahn@iml.unibe.ch>  remove usage of csr and generation of key file
    # 2022-03-31  <axel.hahn@iml.unibe.ch>  dns authentication with alias domain
    # 2022-04-04  <axel.hahn@iml.unibe.ch>  Bugfix: copy key from csr folder to ~/.acme/
    # 2022-04-04  <axel.hahn@iml.unibe.ch>  added param "list-old"
    # ======================================================================
    
    
    # ----------------------------------------------------------------------
    #
    # CONFIG
    #
    # ----------------------------------------------------------------------
    
    logdir="./log"
    touchfile="$logdir/lastchange.txt"
    logfile="$logdir/certmanager.log"
    
    # CSR USAGE WAS REMOVED
    # csrfile="./templates/csr.txt"
    
    line="_______________________________________________________________________________"
    
    showdebug=1
    writelog=1
    
    
    # ----------------------------------------------------------------------
    #
    # INTERNAL FUNCTIONS
    #
    # ----------------------------------------------------------------------
    
    # internal function; list certificates incl. creation date and renew date
    function _listCerts(){
    	$ACME --list	
    }
    
    # internal function; get a list of fqdn of all existing certs
    function _listCertdomains(){
    	_listCerts | sed -n '2,$p' | awk '{ print $1 }'
    }
    
    # internal function; checks if a certificate for a given FQDN already exists
    # used in _certMustExist, _certMustNotExist
    # param  string  FQDN
    function _certExists(){
    	_listCertdomains | grep "^${CM_fqdn}$" >/dev/null
    }
    
    # internal function; a certificate of a given FQDN must exist - otherwise
    # the script will be aborted
    # param  string  FQDN
    function _certMustExist(){
    	_certExists
    	if [ $? -ne 0 ]; then
    		echo "ERROR: cert ${CM_fqdn} was not added yet."
    		exit 1
    	fi
    }
    
    # internal function; a certificate of a given FQDN must not exist - otherwise
    # the script will be aborted
    # param  string  FQDN
    function _certMustNotExist(){
    	if _certExists
    	then
    		echo "ERROR: cert ${CM_fqdn} was added already."
    		# exit 1
    		echo "Press Ctrl+C to abort within the next 10 sec..."
    		sleep 10
    	fi
    }
    
    # internal function: transfer generated/ updated cert data to a
    # known directory (based on CM_diracme - see inc_config.sh)
    # used in public_add and public_renew
    # used in ADD and RENEW action
    function _certTransfer(){
    	_wd "--- acme internal data - ~/.acme.sh/${CM_fqdn}"
    	ls -l ~/.acme.sh/${CM_fqdn}
    
    	_wd "--- delete current files in ${CM_dircerts}/ if they already exist."
        test -d ${CM_dircerts} && rm -f "${CM_dircerts}/*" 2>/dev/null
    
    	_wd "--- transfer acme.sh files to ${CM_dircerts}/"
    	if ! $ACME \
    		--install-cert \
    		-d "${CM_fqdn}" \
    		--key-file        "${CM_outfile_key}"   \
    		--cert-file       "${CM_outfile_cert}"  \
    		--fullchain-file  "${CM_outfile_chain}" \
    		--ca-file         "${CM_outfile_ca}"
        then
            echo "ERROR occured during acme transfer. Removing files in ${CM_dircerts} to prevent strange effects..."
            rm -f "${CM_dircerts}/*"
            exit 2
        fi
    	echo "OK."
    	
    	# _wd "--- copy key to ${CM_dircerts}"
    	# cp ${CM_filekey} ${CM_outfile_key}
    
    	_wd "--- create chained file for haproxy"
    	cat "${CM_outfile_chain}" "${CM_outfile_key}" > "${CM_outfile_haproxy}"
    
    	_wd "--- content of output dir $CM_dircerts:"
    	if ! ls -l "${CM_outfile_cert}" "${CM_outfile_chain}" "${CM_outfile_key}" "${CM_outfile_haproxy}"
        then
            echo "ERROR missing a file (or no access?)"
            rm -f "${CM_dircerts}/*"
            exit 2
        fi
    }
    
    # internal function; show md5 hashsums for certificate and key
    # for visual comparison if the match
    function _certMatching(){
    	# CSR USAGE WAS REMOVED
    	# local md5_csr=$(  test -f ${CM_filecsr}      && openssl req  -noout -modulus -in ${CM_filecsr}      | openssl md5 | cut -f 2 -d " " )
    	local md5_key=$(  test -f ${CM_outfile_key}  && openssl rsa  -noout -modulus -in ${CM_outfile_key}  | openssl md5 | cut -f 2 -d " " )
    	local md5_cert=$( test -f ${CM_outfile_cert} && openssl x509 -noout -modulus -in ${CM_outfile_cert} | openssl md5 | cut -f 2 -d " " )
    
    	echo
    	echo "--- compare hashes"
    	# CSR USAGE WAS REMOVED
    	# echo "csr  : $md5_csr (used for creation of cert)"
    	echo "key  : $md5_key"
    	echo "cert : $md5_cert"
    	if [ "$md5_key" = "$md5_cert" ]; then
    		echo "OK, key and cert match :-)"
    	else
    		echo "ERROR: key and cert do NOT MATCH!"
    	fi
    	echo
    }
    
    # internal function: dig for given fqdn.
    # Function stops if fqdn was not found in DNS.
    # If dig is not found the function skips the DNS check.
    # This function is used in _dnsCheck
    # param  string  fqdn to check
    # param  string  type of dns entry; one of a|cname
    # param  string  optional filter on output of dig (regex)
    function _checkDig(){
        local myfqdn=$1
    	local _type=${2:-"a"}
    	local _verify=${3:-"."}
    
        if which dig >/dev/null
        then
            # _wd "[$myfqdn] exists as type [$_type] in DNS?"
            if ! dig "${myfqdn}" "${_type}" | grep "^${myfqdn}" | grep -E "${_verify}"
            then
                echo "ERROR: [$myfqdn] was not found. Maybe there is a typo in the hostname or it does not exist in DNS."
                exit 2
            fi
            _wd "OK: [$myfqdn] exists in DNS."
        else
            _wd "SKIP: dig was not found"
        fi
        echo
    
    }
    
    # internal function: check DNS entries
    # - the hostname to be added in the certificate must exist
    # - if a hostname does not match and CM_challenge_alias was set:
    #   - _acme-challenge.FQDN must be a cname to _acme-challenge.${CM_challenge_alias}
    # Function stops if a fqdn was not found in DNS.
    # param  string  fqdn(s) that are part of the certificate
    function _dnsCheck(){
    	local altdns=
    	local _mydomain=
    	local _subdomain='_acme-challenge'
    
    	for _mydomain in $*
    	do
    		_wd "dig check - domain for cert"
    		_checkDig "$_mydomain" "a" "IN.*(A|CNAME)" # matches A and CNAME records
    
    		if [ -n "${CM_challenge_alias}" ] && ! echo "$_mydomain" | grep "${CM_certmatch}" >/dev/null
    		then
    			_wd "dig check - cname ${_subdomain}.${_mydomain} must exist"
    			_checkDig "${_subdomain}.${_mydomain}" "cname"
    			_wd "dig check - cname ${_subdomain}.${_mydomain} must point to ${_subdomain}.${CM_challenge_alias}"
    			_checkDig "${_subdomain}.${_mydomain}" "cname" "${_subdomain}.${CM_challenge_alias}"
    		fi
    	done
    
    }
    
    # CSR USAGE WAS REMOVED
    # internal function; generate a csr file before creating a new certifcate
    # this function is used in public_add
    # function _UNUSED_gencsr(){
    
    # 	local altdns=
    
    # 	for myalt in $*
    # 	do
    # 		altdns="${altdns}DNS:$myalt,"
    # 	done
    # 	altdns=$( echo $altdns | sed "s#,\$##" )
    #     _wd "--- $CM_fqdn"
    # 	_wd "DNS alternative names: $altdns"
    
    # 	rm -f $CM_filecnf $CM_filekey $CM_filecsr
    # 	mkdir -p "${CM_dircsr}" 2>/dev/null
    
    # 	cat $csrfile \
    # 		| sed "s#__FQDN__#$CM_fqdn#g"  		\
    # 		| sed "s#__ALTNAMES__#$altdns#g"	\
    # 		> $CM_filecnf || exit 1
    
    # 	# generate csr
    # 	_wd "creating key and csr"
    # 	openssl req -new -config $CM_filecnf -keyout $CM_filekey -out $CM_filecsr || exit 1
    
    # 	# view csr
    # 	# openssl req -noout -text -in $CM_filecsr
    # 	ls -ltr $CM_filecnf $CM_filekey $CM_filecsr
    # }
    
    # internal function; get a sorted list of DNS aliases in the current cert
    function _getAliases(){
    	_sortWords $(
    		openssl x509 -noout -text -in ${CM_outfile_cert} \
    			| grep -E "(DNS:)" \
    			| sed "s#^\ *##g"  \
    			| sed "s#DNS:##g"  \
    			| sed "s#,##g"
    	)
    }
    
    # internal function; check if a required 2nd CLI parameter was given
    # if not the script will abort
    function _requiresFqdn(){
    	if [ -z "$CM_fqdn" ]; then
    		echo "ERROR: 2nd parameter must be a FQDN for Main_Domain."
    		exit 1
    	fi
    }
    
    # internal function; it shows a message if the current instance uses a stage
    # server. It shows a message that it is allowed to test arround ... or to be 
    # careful with LE requests on a production system
    function _testStaging(){
    	echo $ACME_Params | grep "\-\-staging" >/dev/null
    	if [ $? -eq 0 ]; then
    		_wd "Using Let's Encrypt STAGE environment ..."
    		_wd "You can test and mess around. Do not use certs in production."
    	else
    		_wd "Using Let's Encrypt LIVE environment for production."
    		_wd "Be careful with count of connects to Let's Encrypt servers."
    	fi
    	echo
    }
    # internal function; if a user was set as CM_user then verify it with
    # current user
    function _testUser(){
    	if [ ! -z "$CM_user" ]; then
    		local _sUser=`id | cut -f 2 -d "(" | cut -f 1 -d ")"`
    		if [[ $_sUser != "$CM_user" ]]; then
    			echo "ERROR: Run this script under user [$CM_user] - not as $_sUser."
    			exit 1
    		fi
    	fi
    
    }
    
    # set update message in a file
    # param  string(s)  message
    function _update(){
    	echo "[$( date )] $*" > ${touchfile}
    	test ${writelog} && echo "[$( date )] $*" >> ${logfile}
    }
    
    # "neverending" loop that waits until the current process is
    # the one with lowest PID
    function _wait_for_free_slot(){
        local _bWait=true
        typeset -i local _iFirstPID=0
        _wd "--- Need to wait until own process PID $$ is on top ... "
        while [ $_bWait = true ];
        do
            _iFirstPID=$( ps -ef | grep "bash.*$0" | grep -v "ssh.*@" | grep -v "grep" | sort -k 2 -n | head -1 | awk '{ print $2}' )
            if [ $_iFirstPID -eq $$ ]; then
                _bWait=false
                _wd "OK. Go!"
            else
                _wd "- all instances"
                test ${showdebug} && ps -ef | grep "bash.*$0" | grep -v "ssh.*@" | grep -v "grep" | sort -k 2 -n
                sleep 10
            fi
        done
    }
    
    # write debug output if showdebug is set to 1
    function _wd(){
    	test ${showdebug} && echo "DEBUG: $*"
    }
    
    # set environment for a single certificate based on FQDN
    # param  string  FQDN
    function _setenv(){
    	CM_fqdn=$1
    	# CSR USAGE WAS REMOVED
    	# keeping vars to delete files of existing certs that used a csr
    	CM_filecsr="${CM_dircsr}/${CM_fqdn}.csr"
    	CM_filecnf="${CM_dircsr}/${CM_fqdn}.cnf"
    	CM_filekey="${CM_dircsr}/${CM_fqdn}.key"
    
    	CM_dircerts="${CM_diracme}/${CM_fqdn}"
    	CM_outfile_cert=${CM_dircerts}/${CM_fqdn}.cert.cer
    	CM_outfile_chain=${CM_dircerts}/${CM_fqdn}.fullchain.cer
    	CM_outfile_key=${CM_dircerts}/${CM_fqdn}.key.pem
    	CM_outfile_haproxy=${CM_dircerts}/${CM_fqdn}.haproxy.pem
    	CM_outfile_ca=${CM_dircerts}/${CM_fqdn}.ca.cer
    
    	# echo $CM_fqdn; set | grep "^CM_"; echo
    
    }
    # internal function; helper: sort words in alphabetic order
    function _sortWords(){
    	echo $* | tr " " "\n" | sort | tr "\n" " "
    }
    
    # internal function; verify fqdn in cli params - each fqdn is allowed only once.
    # on error it shows the count of usage of each fqdn
    function _testFqdncount(){
    	typeset -i local iHostsInParam=$( echo $* | wc -w )
    	typeset -i iHostsUniq=$( echo $* | tr " " "\n" | sort -u | wc -w )
    	if [ $iHostsInParam -ne $iHostsUniq ]; then
    		echo "ERROR: each given FQDN is allowed only once. You need to remove double entries."
    		
    		for myhost in $( echo $* | tr " " "\n" | sort -u )
    		do
    			typeset -i iHostcount=$( echo $* | tr " " "\n" | grep "^$myhost$" | wc -l )
    			test $iHostcount -gt 1 && echo "  $iHostcount x $myhost"
    		done
    		echo
    		exit 1
    	fi
    }
    # ----------------------------------------------------------------------
    #
    # PUBLIC FUNCTIONS
    #
    # ----------------------------------------------------------------------
    
    #
    # pulic function ADD certificate
    # 
    function public_add(){
    	local _params=""
    
    	_wait_for_free_slot
    	_requiresFqdn
        _certMustNotExist
    
    	_dnsCheck $CM_fqdn $*
    
    	for _mydomain in $CM_fqdn $*
    	do
    		_params+="-d $_mydomain "
    
    		if [ -n "${CM_challenge_alias}" ] && ! echo "$_mydomain" | grep "${CM_certmatch}" >/dev/null
    		then
    			_params+="--challenge-alias ${CM_challenge_alias}"
    		fi
    	done
    
    	_wd "--- create output dir $dircerts"
    	mkdir -p "${CM_dircerts}" 2>/dev/null
    
    	_wd "--- create certificate"
    	echo $ACME --issue $_params $ACME_Params 
    	if ! $ACME --issue $_params $ACME_Params 
    	then
    		echo "ERROR: adding cert failed. Trying to delete internal data ..."
    		public_delete $CM_fqdn
    		exit 1
    	fi
    	# $ACME --issue -d $CM_fqdn $ACME_Params || exit 1
    
    	_certTransfer
    	_certMatching
    
    	_update "added $CM_fqdn $*"
    }
    
    # CSR USAGE WAS REMOVED
    # function OLD__public_add(){
    # 	_wait_for_free_slot
    # 	_requiresFqdn
    #     _certMustNotExist
    
    # 	for myhost in $( echo $CM_fqdn $*)
    # 	do 
    # 		echo $myhost | grep "$CM_certmatch" >/dev/null
    # 		if [ $? -ne 0 ]; then
    # 			echo "ERROR: host $myhost does not match [$CM_certmatch]."
    # 			exit 1
    # 		fi
    # 	done
    # 	_gencsr $CM_fqdn $*
    
    # 	_wd "--- create output dir $dircerts"
    # 	mkdir -p "${CM_dircerts}" 2>/dev/null
    
    # 	_wd "--- csr data"
    # 	$ACME --showcsr  --csr $CM_filecsr || exit 1
    
    # 	_wd "--- create certificate"
    # 	echo $ACME --signcsr --csr $CM_filecsr $ACME_Params 
    # 	$ACME --signcsr --csr $CM_filecsr $ACME_Params 
    # 	if [ $? -ne 0 ]; then
    # 		echo "ERROR: adding cert failed. Trying to delete internal data ..."
    # 		public_delete $CM_fqdn
    # 		exit 1
    # 	fi
    # 	# $ACME --issue -d $CM_fqdn $ACME_Params || exit 1
    
    # 	_certTransfer
    # 	_certMatching
    
    # 	_update "added $CM_fqdn $*"
    # }
    
    #
    # pulic function ADD OR RENEW certificate
    # 
    function public_ensure(){
    	_wait_for_free_slot
    	_requiresFqdn
    	_certExists
    	if [ $? -eq 0 ]; then
    		_wd "--- cert $CM_fqdn was found ... compare aliases"
    		local _newAliases=$( _sortWords $CM_fqdn $* )
    		local _certAliases=$( _getAliases )
    
    		_wd "from params: $_newAliases"
    		_wd "inside cert: $_certAliases"
    		if [ "$_newAliases" = "$_certAliases" ]; then
    			_wd "--- DNS aliases match ... renew it (ignore --force - it comes from acme.sh)"
    			public_renew $*
    		else
    			# _wd "--- DNS aliases do NOT match ... deleting cert and create a new one"
    			# public_delete $*
    			_wd "--- DNS aliases do NOT match ... creating a new one"
    			public_add $*
    		fi
    	else
    		_wd "--- cert does mot exist ... add it"
    		public_add $*
    	fi
    }
    
    #
    # public function to delete a cert
    #
    function public_delete(){
    	_wait_for_free_slot
    	_requiresFqdn
    	_certMustExist
    
    	# TODO: revoke it too??
    	_wd "--- revoke cert"
    	$ACME --revoke -d ${CM_fqdn} $ACME_Params
    	_wd "--- delete ACME.SH data"
    	$ACME --remove -d ${CM_fqdn} $ACME_Params
    	_wd "--- delete local data"
    
    	# CSR USAGE WAS REMOVED
    	rm -rf ${CM_dircerts} ${CM_filecnf} ${CM_filekey} ${CM_filecsr} ~/.acme.sh/${CM_fqdn} && echo OK
    	_update "deleted ${CM_fqdn}"
    }
    
    
    #
    # public function; list certificates incl. creation date and renew date
    # 
    function public_list(){
    	_listCerts
    
    }
    #
    # public function; list old / outdated certificates
    # 
    function public_list-old(){
    
    	local _iRuntime=90
    	local _iWarn=65
    	typeset -i local _rc=0
    
    	cd "${CM_dircerts}"  || exit 1
    
    	echo
    	echo "Cert dir is $( pwd )"
    	echo
    	echo "---- Certificates expiring soon - with age $_iWarn ... $_iRuntime days:"
    	if find -type f -name "*.cert.cer" -mtime +$_iWarn -mtime -$_iRuntime | grep . >/dev/null
    	then
    		find -type f -name "*.cert.cer" -mtime +$_iWarn -mtime -$_iRuntime  -exec ls -ld {} \; | nl
    		_rc=1
    	else 
    		echo "     NONE."
    	fi
    	echo
    	echo "---- Certificate list ... older $_iRuntime days:"
    	if find -type f -name "*.cert.cer" -mtime +$_iRuntime | grep . >/dev/null
    	then
    		find -type f -name "*.cert.cer" -mtime +$_iRuntime -exec ls -ld {} \; | nl
    		_rc=2
    	else
    		echo "     NONE."
    	fi
    
    	echo	
    	cd - >/dev/null
    
    	_wd "Exiting with rc=$_rc"
    	exit $_rc
    }
    
    #
    # public function - renew a certificate
    # param  string  fqdn of domain to renew
    function public_renew(){
    	_wait_for_free_slot
    	_requiresFqdn
    	_certMustExist
    
    	# BUGFIX: acme.sh does not create a new key file on renew.
    	# After switching from csr method to pram -d we got a 0 byte Keyfile
    	local _acme_keyfile=~/.acme.sh/${CM_fqdn}/${CM_fqdn}.key
    	if test ! -f "$_acme_keyfile"
    	then
    		echo "FIX: copy key from csr folder $CM_filekey to $_acme_keyfile"
    		if ! cp "$CM_filekey" "$_acme_keyfile"
    		then
    			exit 1
    		fi
    	fi
    	# /BUGFIX
    
    	$ACME --renew -d ${CM_fqdn} $ACME_Params
    	local _rc=$?
    
    	case $_rc in
    		0)
    			_certTransfer
    			_certMatching
    			_update "renewed ${CM_fqdn}"
    			;;
    		2)
    			_wd "renew was skipped ... we need to wait a while."
    			;;
    		*)
    			_wd "Error ocured."
    			exit $_rc
    	esac
    }
    
    #
    # public function - renew all certificates (to be used in a cronjob)
    # no params
    function public_renew-all(){
    
    	_listCertdomains | while read mydomain
    	do
    		_wd "--- renew $mydomain"
    		_setenv ${mydomain}
    		public_renew
    	done
    
    }
    
    
    # internal function; helper for selftest to handle a single selftest
    # if a given command is successful it shows "OK" or "ERROR" followed
    # by the label inparam 2.
    # The value _iErrors will be incremented by 1 if an error occured.
    # param  string  command to verify
    # param  string  output label
    function _selftestItem(){
    	local _check=$1
    	local _label=$2
    	local _status="OK:"
    
    	eval "$_check"
    	if [ $? -ne 0 ]; then
    		_status="ERROR: the check failed for the test of -"
    		_iErrors=$_iErrors+1
    	fi
    
    	echo "$_status $_label"
    }
    
    #
    # list existing certs
    # no params
    function public_selftest(){
    
    	typeset -i _iErrors=0
    
    	echo
    	echo --- dependencies
    	_selftestItem "which openssl" "openssl was found"
    	_selftestItem "which curl" "curl was found"
    	echo
    
    	echo --- acme.sh client
    	_selftestItem "ls -ld ${ACME}" "${ACME} exits"
    	_selftestItem "test -x ${ACME}" "${ACME} is executable"
    	echo
    
    	echo --- acme.sh installation \(may fail in future releases of acme.sh\)
    	_selftestItem "ls -ld ~/.acme.sh" "internal acme data were found = [acme.sh --install] was done"
    	_selftestItem "test -w ~/.acme.sh/" "it is writable"
    	echo
    
    	# CSR USAGE WAS REMOVED
    	# echo --- csr template
    	# _selftestItem "ls -ld ${csrfile}"  "csr base template exists"
    	# _selftestItem "test -r ${csrfile}" "it is readable"
    	# echo
        #
    	# echo --- output directory for csr and key
    	# _selftestItem "ls -ld ${CM_dircsr}"  "data dir for csr exists"
    	# _selftestItem "test -w ${CM_dircsr}" "it is writable"
    	# echo
    
    	echo --- output dir for centralized place of certificates
    	_selftestItem "ls -ld ${CM_diracme}"  "central output dir for certificate data exists"
    	_selftestItem "test -w ${CM_diracme}" "it is writable"
    	echo
    
    
    	echo --- logs
    	_selftestItem "ls -ld ./log/" "Logdir exists"
    	_selftestItem "test -w" "Logdir is writable"
    	test -f $logfile    &&  _selftestItem  "test -w $logfile" "Logfile $logfile is writable"
    	test -f $touchfile  && _selftestItem "test -w $touchfile" "Logfile $touchfile is writable"
    	echo
    
    	echo --- Errors: $_iErrors
    	test $_iErrors -eq 0 && echo "OK, this looks fine."
    	echo
    	exit $_iErrors
    }
    
    #
    # list existing certs
    # no params
    function public_show(){
    	_requiresFqdn
    	_certMustExist
    
    	# CSR USAGE WAS REMOVED
    	# ls -l ${CM_filecsr} ${CM_dircerts}/*
    	ls -l ${CM_dircerts}/*
    	_certMatching
    
    	# CSR USAGE WAS REMOVED
    	# echo $line
    	# echo CSR $CM_filecsr
    	# openssl req -noout -text -in $CM_filecsr | grep -E "(Subject:|DNS:)" | sed "s#^\ *##g"
    
    	for myfile in ${CM_outfile_cert} ${CM_outfile_haproxy}
    	do
            echo $line
            echo Cert ${myfile}
            # openssl x509 -noout -text -in ${CM_outfile_cert}
            openssl x509 -noout -text -in ${myfile} | grep -E "(Issuer:|Subject:|Not\ |DNS:)"| sed "s#^\ *##g"
        done
    }
    
    # Transfer cert from acme.sh internal cache to our output dir again
    function public_transfer(){
    	_wait_for_free_slot
    	_requiresFqdn
    	_certExists
    
    	_certTransfer
    }
    
    # ----------------------------------------------------------------------
    #
    # main
    #
    # ----------------------------------------------------------------------
    
    cd $( dirname $0 )
    
    if [ "$1" = "--trace" ]; then
    	tracelog="$logdir/trace__$2__$3__`date +%Y-%m-%d__%H-%M-%S`.log"
    	exec  > >(tee -a ${tracelog}    )
    	exec 2> >(tee -a ${tracelog} >&2)
    	echo "TRACELOG was triggered."
    	echo "TIME   : $(date)"
    	echo "COMMAND: $0 $*"
    	echo "LOG    : $tracelog"
    
    	# set -vx
    	shift 1
    fi
    
    cat <<ENDOFHEADER
    $line
    
    
                 	- - - ---===>>> CERT MANAGER <<<===--- - - -
    
    $line
    
    ENDOFHEADER
    
    which openssl >/dev/null || exit 1
    
    . ./inc_config.sh
    if [ $? -ne 0 ]; then
    	echo "ERROR: loading the config failed."
    	echo "Copy the inc_config.sh.dist to inc_config.sh and make your settings in it."
    	echo
    	exit 1
    fi
    
    _testUser
    _testStaging
    
    test -z "${CM_diracme}" && CM_diracme=./certs
    test -z "${CM_dircsr}"  && CM_dircsr=./csr
    
    grep "function\ public_$1" $( basename $0 ) >/dev/null 
    if [ $# -gt 0 -a $? -eq 0 ]; then
    	# _wd $*
    	action=$1
    	CM_fqdn=$2
    	shift 2
    
    	_testFqdncount $CM_fqdn $*
    
    	test -z "${ACME}" && ACME=$( which acme.sh )
    	if [ ! -x "${ACME}" ]; then
    		echo "ERROR: acme.sh not found. You need to install acme.sh client and configure it in inc_config.sh."
    		exit 1
    	fi
    
    	_setenv $CM_fqdn
    
    	_wd "A C T I O N -->> $action <<--"
    	eval "public_$action $*"
    else
    	self=$( basename $0 )
    	cat <<EOF
    
    HELP
    
    The basic syntax is
    $self [--trace] ACTION [FQDN] [ALIAS_1 [.. ALIAS_N]]
    
    The ACTIONs for SINGLE certificate handlings are:
    
            add FQDN [.. FQDN-N] 
                    create new certificate
                    The first FQDN is a hostname to generate the certificate for. 
                    Following multiple hostnames will be used as DNS aliases in the 
                    same certificate.
                    It updates files in ${CM_diracme}
    
            ensure FQDN [.. FQDN-N] 
                    It ensures that a certificate with given aliases exists and is up to date.
                    This param is for simple usage in automation tools like Ansible or Puppet.
                    It is required to add all aliases as parameters what is unhandy for
                    direct usage on cli.
    
                    If the cert does not exist it will be created (see "add").
                    If fqdn and aliases are the same like in the certificate it performs a renew.
                    If fqdn and aliases differ:
                    - the current certificate will be rejected + deleted (see "delete")
                    - a new certificate will be added ()
    
            delete FQDN
                    delete all files of a given certificate
    
            renew FQDN
                    renew (an already added) certificate
                    and update files in ${CM_diracme}
    
            show FQDN
                    show place of certificate data and show basic certificate data
                    (issuer, subject, aliases, ending date)
    
            transfer FQDN
                    Transfer cert from acme.sh internal cache to our output dir again.
                    It is done during add or renew. With transfer command you can repeat it.
    
    ACTIONs for ALL certs
    
            list
                    list all certificates including creation and renew date
    
            list-old
                    list all certificates older 65 and older 90 days and exit.
    				Exitcodes:
    				  0 - all certs are up to date.
    				  1 - certificates to renew were found
    				  2 - outdatedt certificates were found
    
            renew-all
                    renew all certificates (fast mode - without --force)
                    and update files in ${CM_diracme}
                    It is useful for a cronjob.
    
    other ACTIONs
    
            selftest
                    check of health with current setup and requirements.
                    This command is helpful for initial setups.
    
    OPTIONS
            --trace (it must be the 1st parameter) 
                    the output additionally will be written into a tracelog file 
                    below $logdir.
    
    EOF
    fi
    
    echo
    _testStaging