3 # letsencrypt.sh by lukas2511
4 # Source: https://github.com/lukas2511/letsencrypt.sh
9 umask 077 # paranoid umask, we're creating private keys
11 # Get the directory in which this script is stored
12 SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
13 BASEDIR="${SCRIPTDIR}"
15 # Check for script dependencies
16 check_dependencies() {
17 # just execute some dummy and/or version commands to see if required tools exist and are actually usable
18 openssl version > /dev/null 2>&1 || _exiterr "This script requires an openssl binary."
19 _sed "" < /dev/null > /dev/null 2>&1 || _exiterr "This script requires sed with support for extended (modern) regular expressions."
20 grep -V > /dev/null 2>&1 || _exiterr "This script requires grep."
21 mktemp -u -t XXXXXX > /dev/null 2>&1 || _exiterr "This script requires mktemp."
23 # curl returns with an error code in some ancient versions so we have to catch that
25 curl -V > /dev/null 2>&1
28 if [[ ! "${retcode}" = "0" ]] && [[ ! "${retcode}" = "2" ]]; then
29 _exiterr "This script requires curl."
33 # Setup default config values, search for and load configuration files
35 # Check for config in various locations
36 if [[ -z "${CONFIG:-}" ]]; then
37 for check_config in "/etc/letsencrypt.sh" "/usr/local/etc/letsencrypt.sh" "${PWD}" "${SCRIPTDIR}"; do
38 if [[ -e "${check_config}/config.sh" ]]; then
39 BASEDIR="${check_config}"
40 CONFIG="${check_config}/config.sh"
47 CA="https://acme-v01.api.letsencrypt.org/directory"
48 LICENSE="https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf"
49 CHALLENGETYPE="http-01"
52 PRIVATE_KEY="${BASEDIR}/private_key.pem"
54 WELLKNOWN="${BASEDIR}/.acme-challenges"
55 PRIVATE_KEY_RENEW="no"
57 OPENSSL_CNF="$(openssl version -d | cut -d'"' -f2)/openssl.cnf"
59 LOCKFILE="${BASEDIR}/lock"
61 if [[ -z "${CONFIG:-}" ]]; then
63 echo "# !! WARNING !! No config file found, using default config!" >&2
65 elif [[ -e "${CONFIG}" ]]; then
66 echo "# INFO: Using config file ${CONFIG}"
67 BASEDIR="$(dirname "${CONFIG}")"
68 # shellcheck disable=SC1090
71 _exiterr "Specified config file doesn't exist."
74 # Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality.
75 BASEDIR="${BASEDIR%%/}"
77 # Check BASEDIR and set default variables
78 [[ -d "${BASEDIR}" ]] || _exiterr "BASEDIR does not exist: ${BASEDIR}"
80 [[ -n "${PARAM_HOOK:-}" ]] && HOOK="${PARAM_HOOK}"
81 [[ -n "${PARAM_CHALLENGETYPE:-}" ]] && CHALLENGETYPE="${PARAM_CHALLENGETYPE}"
82 [[ -n "${PARAM_KEY_ALGO:-}" ]] && KEY_ALGO="${PARAM_KEY_ALGO}"
84 [[ "${CHALLENGETYPE}" =~ (http-01|dns-01) ]] || _exiterr "Unknown challenge type ${CHALLENGETYPE}... can not continue."
85 if [[ "${CHALLENGETYPE}" = "dns-01" ]] && [[ -z "${HOOK}" ]]; then
86 _exiterr "Challenge type dns-01 needs a hook script for deployment... can not continue."
88 [[ "${KEY_ALGO}" =~ ^(rsa|prime256v1|secp384r1)$ ]] || _exiterr "Unknown public key algorithm ${KEY_ALGO}... can not continue."
95 # Lockfile handling (prevents concurrent access)
96 LOCKDIR="$(dirname "${LOCKFILE}")"
97 [[ -w "${LOCKDIR}" ]] || _exiterr "Directory ${LOCKDIR} for LOCKFILE ${LOCKFILE} is not writable, aborting."
98 ( set -C; date > "${LOCKFILE}" ) 2>/dev/null || _exiterr "Lock file '${LOCKFILE}' present, aborting."
99 remove_lock() { rm -f "${LOCKFILE}"; }
100 trap 'remove_lock' EXIT
103 CA_DIRECTORY="$(http_request get "${CA}")"
104 CA_NEW_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-cert)" &&
105 CA_NEW_AUTHZ="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-authz)" &&
106 CA_NEW_REG="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-reg)" &&
107 # shellcheck disable=SC2015
108 CA_REVOKE_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value revoke-cert)" ||
109 _exiterr "Problem retrieving ACME/CA-URLs, check if your configured CA points to the directory entrypoint."
111 # Export some environment variables to be used in hook script
112 export WELLKNOWN BASEDIR CONFIG
114 # Checking for private key ...
115 register_new_key="no"
116 if [[ -n "${PARAM_PRIVATE_KEY:-}" ]]; then
117 # a private key was specified from the command line so use it for this run
118 echo "Using private key ${PARAM_PRIVATE_KEY} instead of account key"
119 PRIVATE_KEY="${PARAM_PRIVATE_KEY}"
121 # Check if private account key exists, if it doesn't exist yet generate a new one (rsa key)
122 if [[ ! -e "${PRIVATE_KEY}" ]]; then
123 echo "+ Generating account key..."
124 _openssl genrsa -out "${PRIVATE_KEY}" "${KEYSIZE}"
125 register_new_key="yes"
128 openssl rsa -in "${PRIVATE_KEY}" -check 2>/dev/null > /dev/null || _exiterr "Private key is not valid, can not continue."
130 # Get public components from private key and calculate thumbprint
131 pubExponent64="$(openssl rsa -in "${PRIVATE_KEY}" -noout -text | grep publicExponent | grep -oE "0x[a-f0-9]+" | cut -d'x' -f2 | hex2bin | urlbase64)"
132 pubMod64="$(openssl rsa -in "${PRIVATE_KEY}" -noout -modulus | cut -d'=' -f2 | hex2bin | urlbase64)"
134 thumbprint="$(printf '{"e":"%s","kty":"RSA","n":"%s"}' "${pubExponent64}" "${pubMod64}" | openssl sha -sha256 -binary | urlbase64)"
136 # If we generated a new private key in the step above we have to register it with the acme-server
137 if [[ "${register_new_key}" = "yes" ]]; then
138 echo "+ Registering account key with letsencrypt..."
139 [[ ! -z "${CA_NEW_REG}" ]] || _exiterr "Certificate authority doesn't allow registrations."
140 # If an email for the contact has been provided then adding it to the registration request
141 if [[ -n "${CONTACT_EMAIL}" ]]; then
142 signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > /dev/null
144 signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > /dev/null
148 if [[ "${CHALLENGETYPE}" = "http-01" && ! -d "${WELLKNOWN}" ]]; then
149 _exiterr "WELLKNOWN directory doesn't exist, please create ${WELLKNOWN} and set appropriate permissions."
153 # Different sed version for different os types...
155 if [[ "${OSTYPE}" = "Linux" ]]; then
162 # Print error message and exit with error
164 echo "ERROR: ${1}" >&2
168 # Encode data as url-safe formatted base64
170 # urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_'
171 openssl base64 -e | tr -d '\n\r' | _sed -e 's:=*$::g' -e 'y:+/:-_:'
174 # Convert hex string to binary data
176 # Remove spaces, add leading zero, escape as hex string and parse with printf
177 printf -- "$(cat | _sed -e 's/[[:space:]]//g' -e 's/^(.(.{2})*)$/0\1/' -e 's/(.{2})/\\x\1/g')"
180 # Get string value from json dictionary
181 get_json_string_value() {
182 grep -Eo '"'"${1}"'":[[:space:]]*"[^"]*"' | cut -d'"' -f4
185 # OpenSSL writes to stderr/stdout even when there are no errors. So just
186 # display the output if the exit code was != 0 to simplify debugging.
189 out="$(openssl "${@}" 2>&1)"
192 if [[ $res -ne 0 ]]; then
193 echo " + ERROR: failed to run $* (Exitcode: $res)" >&2
201 # Send http(s) request with specified method
203 tempcont="$(mktemp -t XXXXXX)"
205 if [[ "${1}" = "head" ]]; then
206 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)"
207 elif [[ "${1}" = "get" ]]; then
208 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}")"
209 elif [[ "${1}" = "post" ]]; then
210 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")"
212 _exiterr "Unknown request method: ${1}"
215 if [[ ! "${statuscode:0:1}" = "2" ]]; then
216 echo " + ERROR: An error occurred while sending ${1}-request to ${2} (Status ${statuscode})" >&2
219 cat "${tempcont}" >&2
222 # Wait for hook script to clean the challenge if used
223 if [[ -n "${HOOK}" ]] && [[ -n "${challenge_token:+set}" ]]; then
224 ${HOOK} "clean_challenge" '' "${challenge_token}" "${keyauth}"
227 # remove temporary domains.txt file if used
228 [[ -n "${PARAM_DOMAIN:-}" ]] && rm "${DOMAINS_TXT}"
236 # Send signed request
238 # Encode payload as urlbase64
239 payload64="$(printf '%s' "${2}" | urlbase64)"
241 # Retrieve nonce from acme-server
242 nonce="$(http_request head "${CA}" | grep Replay-Nonce: | awk -F ': ' '{print $2}' | tr -d '\n\r')"
244 # Build header with just our public key and algorithm information
245 header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}'
247 # Build another header which also contains the previously received nonce and encode it as urlbase64
248 protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}'
249 protected64="$(printf '%s' "${protected}" | urlbase64)"
251 # Sign header with nonce and our payload with our private key and encode signature as urlbase64
252 signed64="$(printf '%s' "${protected64}.${payload64}" | openssl dgst -sha256 -sign "${PRIVATE_KEY}" | urlbase64)"
254 # Send header + extended header + payload + signature to the acme-server
255 data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
257 http_request post "${1}" "${data}"
260 # Create certificate for domain(s) and outputs it FD 3
262 csr="${1}" # the CSR itself (not a file)
264 if { true >&3; } 2>/dev/null; then
267 _exiterr "sign_csr: FD 3 not open"
273 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
274 _exiterr "Certificate authority doesn't allow certificate signing"
277 # Request and respond to challenges
278 for altname in ${altnames}; do
279 # Ask the acme-server for new challenge token and extract them from the resulting json block
280 echo " + Requesting challenge for ${altname}..."
281 response="$(signed_request "${CA_NEW_AUTHZ}" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}')"
283 challenges="$(printf '%s\n' "${response}" | grep -Eo '"challenges":[^\[]*\[[^]]*]')"
284 repl=$'\n''{' # fix syntax highlighting in Vim
285 challenge="$(printf "%s" "${challenges//\{/${repl}}" | grep \""${CHALLENGETYPE}"\")"
286 challenge_token="$(printf '%s' "${challenge}" | get_json_string_value token | _sed 's/[^A-Za-z0-9_\-]/_/g')"
287 challenge_uri="$(printf '%s' "${challenge}" | get_json_string_value uri)"
289 if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then
290 _exiterr "Can't retrieve challenges (${response})"
293 # Challenge response consists of the challenge token and the thumbprint of our public certificate
294 keyauth="${challenge_token}.${thumbprint}"
296 case "${CHALLENGETYPE}" in
298 # Store challenge response in well-known location and make world-readable (so that a webserver can access it)
299 printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}"
300 chmod a+r "${WELLKNOWN}/${challenge_token}"
301 keyauth_hook="${keyauth}"
304 # Generate DNS entry content for dns-01 validation
305 keyauth_hook="$(printf '%s' "${keyauth}" | openssl sha -sha256 -binary | urlbase64)"
309 # Wait for hook script to deploy the challenge if used
310 [[ -n "${HOOK}" ]] && ${HOOK} "deploy_challenge" "${altname}" "${challenge_token}" "${keyauth_hook}"
312 # Ask the acme-server to verify our challenge and wait until it is no longer pending
313 echo " + Responding to challenge for ${altname}..."
314 result="$(signed_request "${challenge_uri}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}')"
316 status="$(printf '%s\n' "${result}" | get_json_string_value status)"
318 while [[ "${status}" = "pending" ]]; do
320 status="$(http_request get "${challenge_uri}" | get_json_string_value status)"
323 [[ "${CHALLENGETYPE}" = "http-01" ]] && rm -f "${WELLKNOWN}/${challenge_token}"
325 # Wait for hook script to clean the challenge if used
326 if [[ -n "${HOOK}" ]] && [[ -n "${challenge_token}" ]]; then
327 ${HOOK} "clean_challenge" "${altname}" "${challenge_token}" "${keyauth_hook}"
330 if [[ "${status}" = "valid" ]]; then
331 echo " + Challenge is valid!"
333 _exiterr "Challenge is invalid! (returned: ${status})"
337 # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem
338 echo " + Requesting certificate..."
339 csr64="$( <<<"${csr}" openssl req -outform DER | urlbase64)"
340 crt64="$(signed_request "${CA_NEW_CERT}" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)"
341 crt="$( printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" )"
343 # Try to load the certificate to detect corruption
344 echo " + Checking certificate..."
345 _openssl x509 -text <<<"${crt}"
349 unset challenge_token
353 # Create certificate for domain(s)
357 timestamp="$(date +%s)"
359 echo " + Signing domains..."
360 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
361 _exiterr "Certificate authority doesn't allow certificate signing"
364 # If there is no existing certificate directory => make it
365 if [[ ! -e "${BASEDIR}/certs/${domain}" ]]; then
366 echo " + Creating new directory ${BASEDIR}/certs/${domain} ..."
367 mkdir -p "${BASEDIR}/certs/${domain}"
370 privkey="privkey.pem"
371 # generate a new private key if we need or want one
372 if [[ ! -f "${BASEDIR}/certs/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
373 echo " + Generating private key..."
374 privkey="privkey-${timestamp}.pem"
375 case "${KEY_ALGO}" in
376 rsa) _openssl genrsa -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}";;
377 prime256v1|secp384r1) _openssl ecparam -genkey -name "${KEY_ALGO}" -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem";;
381 # Generate signing request config and the actual signing request
382 echo " + Generating signing request..."
384 for altname in ${altnames}; do
385 SAN+="DNS:${altname}, "
388 local tmp_openssl_cnf
389 tmp_openssl_cnf="$(mktemp -t XXXXXX)"
390 cat "${OPENSSL_CNF}" > "${tmp_openssl_cnf}"
391 printf "[SAN]\nsubjectAltName=%s" "${SAN}" >> "${tmp_openssl_cnf}"
392 openssl req -new -sha256 -key "${BASEDIR}/certs/${domain}/${privkey}" -out "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" -subj "/CN=${domain}/" -reqexts SAN -config "${tmp_openssl_cnf}"
393 rm -f "${tmp_openssl_cnf}"
395 crt_path="${BASEDIR}/certs/${domain}/cert-${timestamp}.pem"
396 sign_csr "$(< "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" )" ${altnames} 3>"${crt_path}"
398 # Create fullchain.pem
399 echo " + Creating fullchain.pem..."
400 cat "${crt_path}" > "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
401 http_request get "$(openssl x509 -in "${BASEDIR}/certs/${domain}/cert-${timestamp}.pem" -noout -text | grep 'CA Issuers - URI:' | cut -d':' -f2-)" > "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem"
402 if ! grep -q "BEGIN CERTIFICATE" "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem"; then
403 openssl x509 -in "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" -inform DER -out "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" -outform PEM
405 cat "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" >> "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
408 [[ "${privkey}" = "privkey.pem" ]] || ln -sf "privkey-${timestamp}.pem" "${BASEDIR}/certs/${domain}/privkey.pem"
410 ln -sf "chain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/chain.pem"
411 ln -sf "fullchain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/fullchain.pem"
412 ln -sf "cert-${timestamp}.csr" "${BASEDIR}/certs/${domain}/cert.csr"
413 ln -sf "cert-${timestamp}.pem" "${BASEDIR}/certs/${domain}/cert.pem"
415 # Wait for hook script to clean the challenge and to deploy cert if used
416 [[ -n "${HOOK}" ]] && ${HOOK} "deploy_cert" "${domain}" "${BASEDIR}/certs/${domain}/privkey.pem" "${BASEDIR}/certs/${domain}/cert.pem" "${BASEDIR}/certs/${domain}/fullchain.pem"
418 unset challenge_token
423 # Description: Sign/renew non-existant/changed/expiring certificates.
424 command_sign_domains() {
427 if [[ -n "${PARAM_DOMAIN:-}" ]]; then
428 DOMAINS_TXT="$(mktemp -t XXXXXX)"
429 printf -- "${PARAM_DOMAIN}" > "${DOMAINS_TXT}"
430 elif [[ -e "${BASEDIR}/domains.txt" ]]; then
431 DOMAINS_TXT="${BASEDIR}/domains.txt"
433 _exiterr "domains.txt not found and --domain not given"
436 # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire
437 <"${DOMAINS_TXT}" _sed -e 's/^[[:space:]]*//g' -e 's/[[:space:]]*$//g' -e 's/[[:space:]]+/ /g' | (grep -vE '^(#|$)' || true) | while read -r line; do
438 domain="$(printf '%s\n' "${line}" | cut -d' ' -f1)"
439 morenames="$(printf '%s\n' "${line}" | cut -s -d' ' -f2-)"
440 cert="${BASEDIR}/certs/${domain}/cert.pem"
442 force_renew="${PARAM_FORCE:-no}"
444 if [[ -z "${morenames}" ]];then
445 echo "Processing ${domain}"
447 echo "Processing ${domain} with alternative names: ${morenames}"
450 if [[ -e "${cert}" ]]; then
451 printf " + Checking domain name(s) of existing cert..."
453 certnames="$(openssl x509 -in "${cert}" -text -noout | grep DNS: | _sed 's/DNS://g' | tr -d ' ' | tr ',' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//')"
454 givennames="$(echo "${domain}" "${morenames}"| tr ' ' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//' | _sed 's/^ //')"
456 if [[ "${certnames}" = "${givennames}" ]]; then
460 echo " + Domain name(s) are not matching!"
461 echo " + Names in old certificate: ${certnames}"
462 echo " + Configured names: ${givennames}"
463 echo " + Forcing renew."
468 if [[ -e "${cert}" ]]; then
469 echo " + Checking expire date of existing cert..."
470 valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )"
472 printf " + Valid till %s " "${valid}"
473 if openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; then
474 printf "(Longer than %d days). " "${RENEW_DAYS}"
475 if [[ "${force_renew}" = "yes" ]]; then
476 echo "Ignoring because renew was forced!"
482 echo "(Less than ${RENEW_DAYS} days). Renewing!"
486 # shellcheck disable=SC2086
490 # remove temporary domains.txt file if used
491 [[ -n "${PARAM_DOMAIN:-}" ]] && rm -f "${DOMAINS_TXT}"
496 # Usage: --revoke (-r) path/to/cert.pem
497 # Description: Revoke specified certificate
501 [[ -n "${CA_REVOKE_CERT}" ]] || _exiterr "Certificate authority doesn't allow certificate revocation."
504 if [[ -L "${cert}" ]]; then
505 # follow symlink and use real certificate name (so we move the real file and not the symlink at the end)
507 link_target="$(readlink -n "${cert}")"
508 if [[ "${link_target}" =~ ^/ ]]; then
509 cert="${link_target}"
511 cert="$(dirname "${cert}")/${link_target}"
514 [[ -f "${cert}" ]] || _exiterr "Could not find certificate ${cert}"
516 echo "Revoking ${cert}"
518 cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)"
519 response="$(signed_request "${CA_REVOKE_CERT}" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}')"
520 # if there is a problem with our revoke request _request (via signed_request) will report this and "exit 1" out
521 # so if we are here, it is safe to assume the request was successful
523 echo " + Renaming certificate to ${cert}-revoked"
524 mv -f "${cert}" "${cert}-revoked"
528 # Description: Show help text
530 printf "Usage: %s [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...\n\n" "${0}"
531 printf "Default command: help\n\n"
533 grep -e '^[[:space:]]*# Usage:' -e '^[[:space:]]*# Description:' -e '^command_.*()[[:space:]]*{' "${0}" | while read -r usage; read -r description; read -r command; do
534 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]] || [[ ! "${command}" =~ ^command_ ]]; then
535 _exiterr "Error generating help text."
537 printf " %-32s %s\n" "${usage##"# Usage: "}" "${description##"# Description: "}"
539 printf -- "\nParameters:\n"
540 grep -E -e '^[[:space:]]*# PARAM_Usage:' -e '^[[:space:]]*# PARAM_Description:' "${0}" | while read -r usage; read -r description; do
541 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]]; then
542 _exiterr "Error generating help text."
544 printf " %-32s %s\n" "${usage##"# PARAM_Usage: "}" "${description##"# PARAM_Description: "}"
549 # Description: Output configuration variables for use in other scripts
551 echo "# letsencrypt.sh configuration"
553 typeset -p CA LICENSE CHALLENGETYPE HOOK RENEW_DAYS PRIVATE_KEY KEYSIZE WELLKNOWN PRIVATE_KEY_RENEW OPENSSL_CNF CONTACT_EMAIL LOCKFILE
556 # Main method (parses script arguments and calls command_* methods)
560 [[ -z "${COMMAND}" ]] || _exiterr "Only one command can be executed at a time. See help (-h) for more information."
565 if [[ -z "${1:-}" ]]; then
566 echo "The specified command requires additional parameters. See help:" >&2
570 elif [[ "${1:0:1}" = "-" ]]; then
571 _exiterr "Invalid argument: ${1}"
575 [[ -z "${@}" ]] && eval set -- "--help"
577 while (( "${#}" )); do
589 set_command sign_domains
595 check_parameters "${1:-}"
596 PARAM_REVOKECERT="${1}"
599 # PARAM_Usage: --domain (-d) domain.tld
600 # PARAM_Description: Use specified domain name(s) instead of domains.txt entry (one certificate!)
603 check_parameters "${1:-}"
604 if [[ -z "${PARAM_DOMAIN:-}" ]]; then
607 PARAM_DOMAIN="${PARAM_DOMAIN} ${1}"
612 # PARAM_Usage: --force (-x)
613 # PARAM_Description: Force renew of certificate even if it is longer valid than value in RENEW_DAYS
618 # PARAM_Usage: --privkey (-p) path/to/key.pem
619 # PARAM_Description: Use specified private key instead of account key (useful for revocation)
622 check_parameters "${1:-}"
623 PARAM_PRIVATE_KEY="${1}"
626 # PARAM_Usage: --config (-f) path/to/config.sh
627 # PARAM_Description: Use specified config file
630 check_parameters "${1:-}"
634 # PARAM_Usage: --hook (-k) path/to/hook.sh
635 # PARAM_Description: Use specified script for hooks
638 check_parameters "${1:-}"
642 # PARAM_Usage: --challenge (-t) http-01|dns-01
643 # PARAM_Description: Which challenge should be used? Currently http-01 and dns-01 are supported
646 check_parameters "${1:-}"
647 PARAM_CHALLENGETYPE="${1}"
650 # PARAM_Usage: --algo (-a) rsa|prime256v1|secp384r1
651 # PARAM_Description: Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
654 check_parameters "${1:-}"
655 PARAM_KEY_ALGO="${1}"
659 echo "Unknown parameter detected: ${1}" >&2
671 sign_domains) command_sign_domains;;
672 revoke) command_revoke "${PARAM_REVOKECERT}";;
673 *) command_help; exit 1;;
680 # Check for missing dependencies