3 # letsencrypt.sh by lukas2511
4 # Source: https://github.com/lukas2511/letsencrypt.sh
9 umask 077 # paranoid umask, we're creating private keys
11 # duplicate scripts IO handles
14 # Get the directory in which this script is stored
15 SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
16 BASEDIR="${SCRIPTDIR}"
18 # Check for script dependencies
19 check_dependencies() {
20 # just execute some dummy and/or version commands to see if required tools exist and are actually usable
21 openssl version > /dev/null 2>&1 || _exiterr "This script requires an openssl binary."
22 _sed "" < /dev/null > /dev/null 2>&1 || _exiterr "This script requires sed with support for extended (modern) regular expressions."
23 grep -V > /dev/null 2>&1 || _exiterr "This script requires grep."
24 mktemp -u -t XXXXXX > /dev/null 2>&1 || _exiterr "This script requires mktemp."
26 # curl returns with an error code in some ancient versions so we have to catch that
28 curl -V > /dev/null 2>&1
31 if [[ ! "${retcode}" = "0" ]] && [[ ! "${retcode}" = "2" ]]; then
32 _exiterr "This script requires curl."
36 # Setup default config values, search for and load configuration files
38 # Check for config in various locations
39 if [[ -z "${CONFIG:-}" ]]; then
40 for check_config in "/etc/letsencrypt.sh" "/usr/local/etc/letsencrypt.sh" "${PWD}" "${SCRIPTDIR}"; do
41 if [[ -e "${check_config}/config.sh" ]]; then
42 BASEDIR="${check_config}"
43 CONFIG="${check_config}/config.sh"
50 CA="https://acme-v01.api.letsencrypt.org/directory"
51 LICENSE="https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf"
52 CHALLENGETYPE="http-01"
59 PRIVATE_KEY_RENEW="no"
61 OPENSSL_CNF="$(openssl version -d | cut -d\" -f2)/openssl.cnf"
65 if [[ -z "${CONFIG:-}" ]]; then
67 echo "# !! WARNING !! No main config file found, using default config!" >&2
69 elif [[ -e "${CONFIG}" ]]; then
70 echo "# INFO: Using main config file ${CONFIG}"
71 BASEDIR="$(dirname "${CONFIG}")"
72 # shellcheck disable=SC1090
75 _exiterr "Specified config file doesn't exist."
78 if [[ -n "${CONFIG_D}" ]]; then
79 if [[ ! -d "${CONFIG_D}" ]]; then
80 _exiterr "The path ${CONFIG_D} specified for CONFIG_D does not point to a directory." >&2
83 for check_config_d in ${CONFIG_D}/*.sh; do
84 if [[ ! -e "${check_config_d}" ]]; then
85 echo "# !! WARNING !! Extra configuration directory ${CONFIG_D} exists, but no configuration found in it." >&2
87 elif [[ -f "${check_config_d}" ]] && [[ -r "${check_config_d}" ]]; then
88 echo "# INFO: Using additional config file ${check_config_d}"
91 _exiterr "Specified additional config ${check_config_d} is not readable or not a file at all." >&2
96 # Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality.
97 BASEDIR="${BASEDIR%%/}"
99 # Check BASEDIR and set default variables
100 [[ -d "${BASEDIR}" ]] || _exiterr "BASEDIR does not exist: ${BASEDIR}"
102 [[ -z "${PRIVATE_KEY}" ]] && PRIVATE_KEY="${BASEDIR}/private_key.pem"
103 [[ -z "${WELLKNOWN}" ]] && WELLKNOWN="${BASEDIR}/.acme-challenges"
104 [[ -z "${LOCKFILE}" ]] && LOCKFILE="${BASEDIR}/lock"
106 [[ -n "${PARAM_HOOK:-}" ]] && HOOK="${PARAM_HOOK}"
107 [[ -n "${PARAM_CHALLENGETYPE:-}" ]] && CHALLENGETYPE="${PARAM_CHALLENGETYPE}"
108 [[ -n "${PARAM_KEY_ALGO:-}" ]] && KEY_ALGO="${PARAM_KEY_ALGO}"
110 [[ "${CHALLENGETYPE}" =~ (http-01|dns-01) ]] || _exiterr "Unknown challenge type ${CHALLENGETYPE}... can not continue."
111 if [[ "${CHALLENGETYPE}" = "dns-01" ]] && [[ -z "${HOOK}" ]]; then
112 _exiterr "Challenge type dns-01 needs a hook script for deployment... can not continue."
114 [[ "${KEY_ALGO}" =~ ^(rsa|prime256v1|secp384r1)$ ]] || _exiterr "Unknown public key algorithm ${KEY_ALGO}... can not continue."
121 # Lockfile handling (prevents concurrent access)
122 LOCKDIR="$(dirname "${LOCKFILE}")"
123 [[ -w "${LOCKDIR}" ]] || _exiterr "Directory ${LOCKDIR} for LOCKFILE ${LOCKFILE} is not writable, aborting."
124 ( set -C; date > "${LOCKFILE}" ) 2>/dev/null || _exiterr "Lock file '${LOCKFILE}' present, aborting."
125 remove_lock() { rm -f "${LOCKFILE}"; }
126 trap 'remove_lock' EXIT
129 CA_DIRECTORY="$(http_request get "${CA}")"
130 CA_NEW_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-cert)" &&
131 CA_NEW_AUTHZ="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-authz)" &&
132 CA_NEW_REG="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-reg)" &&
133 # shellcheck disable=SC2015
134 CA_REVOKE_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value revoke-cert)" ||
135 _exiterr "Problem retrieving ACME/CA-URLs, check if your configured CA points to the directory entrypoint."
137 # Export some environment variables to be used in hook script
138 export WELLKNOWN BASEDIR CONFIG
140 # Checking for private key ...
141 register_new_key="no"
142 if [[ -n "${PARAM_PRIVATE_KEY:-}" ]]; then
143 # a private key was specified from the command line so use it for this run
144 echo "Using private key ${PARAM_PRIVATE_KEY} instead of account key"
145 PRIVATE_KEY="${PARAM_PRIVATE_KEY}"
147 # Check if private account key exists, if it doesn't exist yet generate a new one (rsa key)
148 if [[ ! -e "${PRIVATE_KEY}" ]]; then
149 echo "+ Generating account key..."
150 _openssl genrsa -out "${PRIVATE_KEY}" "${KEYSIZE}"
151 register_new_key="yes"
154 openssl rsa -in "${PRIVATE_KEY}" -check 2>/dev/null > /dev/null || _exiterr "Private key is not valid, can not continue."
156 # Get public components from private key and calculate thumbprint
157 pubExponent64="$(openssl rsa -in "${PRIVATE_KEY}" -noout -text | grep publicExponent | grep -oE "0x[a-f0-9]+" | cut -d'x' -f2 | hex2bin | urlbase64)"
158 pubMod64="$(openssl rsa -in "${PRIVATE_KEY}" -noout -modulus | cut -d'=' -f2 | hex2bin | urlbase64)"
160 thumbprint="$(printf '{"e":"%s","kty":"RSA","n":"%s"}' "${pubExponent64}" "${pubMod64}" | openssl sha -sha256 -binary | urlbase64)"
162 # If we generated a new private key in the step above we have to register it with the acme-server
163 if [[ "${register_new_key}" = "yes" ]]; then
164 echo "+ Registering account key with letsencrypt..."
165 [[ ! -z "${CA_NEW_REG}" ]] || _exiterr "Certificate authority doesn't allow registrations."
166 # If an email for the contact has been provided then adding it to the registration request
167 if [[ -n "${CONTACT_EMAIL}" ]]; then
168 signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > /dev/null
170 signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > /dev/null
174 if [[ "${CHALLENGETYPE}" = "http-01" && ! -d "${WELLKNOWN}" ]]; then
175 _exiterr "WELLKNOWN directory doesn't exist, please create ${WELLKNOWN} and set appropriate permissions."
179 # Different sed version for different os types...
181 if [[ "${OSTYPE}" = "Linux" ]]; then
188 # Print error message and exit with error
190 echo "ERROR: ${1}" >&2
194 # Encode data as url-safe formatted base64
196 # urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_'
197 openssl base64 -e | tr -d '\n\r' | _sed -e 's:=*$::g' -e 'y:+/:-_:'
200 # Convert hex string to binary data
202 # Remove spaces, add leading zero, escape as hex string and parse with printf
203 printf -- "$(cat | _sed -e 's/[[:space:]]//g' -e 's/^(.(.{2})*)$/0\1/' -e 's/(.{2})/\\x\1/g')"
206 # Get string value from json dictionary
207 get_json_string_value() {
208 grep -Eo '"'"${1}"'":[[:space:]]*"[^"]*"' | cut -d'"' -f4
211 # OpenSSL writes to stderr/stdout even when there are no errors. So just
212 # display the output if the exit code was != 0 to simplify debugging.
215 out="$(openssl "${@}" 2>&1)"
218 if [[ $res -ne 0 ]]; then
219 echo " + ERROR: failed to run $* (Exitcode: $res)" >&2
227 # Send http(s) request with specified method
229 tempcont="$(mktemp -t XXXXXX)"
231 if [[ "${1}" = "head" ]]; then
232 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)"
233 elif [[ "${1}" = "get" ]]; then
234 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}")"
235 elif [[ "${1}" = "post" ]]; then
236 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")"
238 _exiterr "Unknown request method: ${1}"
241 if [[ ! "${statuscode:0:1}" = "2" ]]; then
242 echo " + ERROR: An error occurred while sending ${1}-request to ${2} (Status ${statuscode})" >&2
245 cat "${tempcont}" >&2
248 # Wait for hook script to clean the challenge if used
249 if [[ -n "${HOOK}" ]] && [[ -n "${challenge_token:+set}" ]]; then
250 ${HOOK} "clean_challenge" '' "${challenge_token}" "${keyauth}" <&4 >&5 2>&6
253 # remove temporary domains.txt file if used
254 [[ -n "${PARAM_DOMAIN:-}" ]] && rm "${DOMAINS_TXT}"
262 # Send signed request
264 # Encode payload as urlbase64
265 payload64="$(printf '%s' "${2}" | urlbase64)"
267 # Retrieve nonce from acme-server
268 nonce="$(http_request head "${CA}" | grep Replay-Nonce: | awk -F ': ' '{print $2}' | tr -d '\n\r')"
270 # Build header with just our public key and algorithm information
271 header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}'
273 # Build another header which also contains the previously received nonce and encode it as urlbase64
274 protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}'
275 protected64="$(printf '%s' "${protected}" | urlbase64)"
277 # Sign header with nonce and our payload with our private key and encode signature as urlbase64
278 signed64="$(printf '%s' "${protected64}.${payload64}" | openssl dgst -sha256 -sign "${PRIVATE_KEY}" | urlbase64)"
280 # Send header + extended header + payload + signature to the acme-server
281 data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
283 http_request post "${1}" "${data}"
286 # Extracts all subject names from a CSR
287 # Outputs either the CN, or the SANs, one per line
289 csr="${1}" # the CSR itself (not a file)
291 if ! <<<"${csr}" openssl req -verify -noout 2>/dev/null; then
292 _exiterr "Certificate signing request isn't valid"
295 reqtext="$( <<<"${csr}" openssl req -noout -text )"
296 if <<<"$reqtext" grep -q '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$'; then
297 # SANs used, extract these
298 altnames="$( <<<"${reqtext}" grep -A1 '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$' | tail -n1 )"
299 # split to one per line:
300 altnames="$( <<<"${altnames}" _sed -e 's/^[[:space:]]*//; s/, /\'$'\n''/' )"
301 # we can only get DNS: ones signed
302 if [ -n "$( <<<"${altnames}" grep -v '^DNS:' )" ]; then
303 _exiterr "Certificate signing request contains non-DNS Subject Alternative Names"
305 # strip away the DNS: prefix
306 altnames="$( <<<"${altnames}" _sed -e 's/^DNS://' )"
310 # No SANs, extract CN
311 altnames="$( <<<"${reqtext}" grep '^[[:space:]]*Subject:' | _sed -e 's/.* CN=([^ /,]*).*/\1/' )"
316 # Create certificate for domain(s) and outputs it FD 3
318 csr="${1}" # the CSR itself (not a file)
320 if { true >&3; } 2>/dev/null; then
323 _exiterr "sign_csr: FD 3 not open"
328 if [ -z "$altnames" ]; then
329 altnames="$( extract_altnames "$csr" )"
332 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
333 _exiterr "Certificate authority doesn't allow certificate signing"
336 # Request and respond to challenges
337 for altname in ${altnames}; do
338 # Ask the acme-server for new challenge token and extract them from the resulting json block
339 echo " + Requesting challenge for ${altname}..."
340 response="$(signed_request "${CA_NEW_AUTHZ}" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}')"
342 challenges="$(printf '%s\n' "${response}" | grep -Eo '"challenges":[^\[]*\[[^]]*]')"
343 repl=$'\n''{' # fix syntax highlighting in Vim
344 challenge="$(printf "%s" "${challenges//\{/${repl}}" | grep \""${CHALLENGETYPE}"\")"
345 challenge_token="$(printf '%s' "${challenge}" | get_json_string_value token | _sed 's/[^A-Za-z0-9_\-]/_/g')"
346 challenge_uri="$(printf '%s' "${challenge}" | get_json_string_value uri)"
348 if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then
349 _exiterr "Can't retrieve challenges (${response})"
352 # Challenge response consists of the challenge token and the thumbprint of our public certificate
353 keyauth="${challenge_token}.${thumbprint}"
355 case "${CHALLENGETYPE}" in
357 # Store challenge response in well-known location and make world-readable (so that a webserver can access it)
358 printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}"
359 chmod a+r "${WELLKNOWN}/${challenge_token}"
360 keyauth_hook="${keyauth}"
363 # Generate DNS entry content for dns-01 validation
364 keyauth_hook="$(printf '%s' "${keyauth}" | openssl sha -sha256 -binary | urlbase64)"
368 # Wait for hook script to deploy the challenge if used
369 [[ -n "${HOOK}" ]] && ${HOOK} "deploy_challenge" "${altname}" "${challenge_token}" "${keyauth_hook}" <&4 >&5 2>&6
371 # Ask the acme-server to verify our challenge and wait until it is no longer pending
372 echo " + Responding to challenge for ${altname}..."
373 result="$(signed_request "${challenge_uri}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}')"
375 status="$(printf '%s\n' "${result}" | get_json_string_value status)"
377 while [[ "${status}" = "pending" ]]; do
379 result="$(http_request get "${challenge_uri}")"
380 status="$(printf '%s\n' "${result}" | get_json_string_value status)"
383 [[ "${CHALLENGETYPE}" = "http-01" ]] && rm -f "${WELLKNOWN}/${challenge_token}"
385 # Wait for hook script to clean the challenge if used
386 if [[ -n "${HOOK}" ]] && [[ -n "${challenge_token}" ]]; then
387 ${HOOK} "clean_challenge" "${altname}" "${challenge_token}" "${keyauth_hook}" <&4 >&5 2>&6
390 if [[ "${status}" = "valid" ]]; then
391 echo " + Challenge is valid!"
393 _exiterr "Challenge is invalid! (returned: ${status}) (result: ${result})"
397 # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem
398 echo " + Requesting certificate..."
399 csr64="$( <<<"${csr}" openssl req -outform DER | urlbase64)"
400 crt64="$(signed_request "${CA_NEW_CERT}" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)"
401 crt="$( printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" )"
403 # Try to load the certificate to detect corruption
404 echo " + Checking certificate..."
405 _openssl x509 -text <<<"${crt}"
409 unset challenge_token
413 # Create certificate for domain(s)
417 timestamp="$(date +%s)"
419 echo " + Signing domains..."
420 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
421 _exiterr "Certificate authority doesn't allow certificate signing"
424 # If there is no existing certificate directory => make it
425 if [[ ! -e "${BASEDIR}/certs/${domain}" ]]; then
426 echo " + Creating new directory ${BASEDIR}/certs/${domain} ..."
427 mkdir -p "${BASEDIR}/certs/${domain}"
430 privkey="privkey.pem"
431 # generate a new private key if we need or want one
432 if [[ ! -f "${BASEDIR}/certs/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
433 echo " + Generating private key..."
434 privkey="privkey-${timestamp}.pem"
435 case "${KEY_ALGO}" in
436 rsa) _openssl genrsa -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}";;
437 prime256v1|secp384r1) _openssl ecparam -genkey -name "${KEY_ALGO}" -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem";;
441 # Generate signing request config and the actual signing request
442 echo " + Generating signing request..."
444 for altname in ${altnames}; do
445 SAN+="DNS:${altname}, "
448 local tmp_openssl_cnf
449 tmp_openssl_cnf="$(mktemp -t XXXXXX)"
450 cat "${OPENSSL_CNF}" > "${tmp_openssl_cnf}"
451 printf "[SAN]\nsubjectAltName=%s" "${SAN}" >> "${tmp_openssl_cnf}"
452 openssl req -new -sha256 -key "${BASEDIR}/certs/${domain}/${privkey}" -out "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" -subj "/CN=${domain}/" -reqexts SAN -config "${tmp_openssl_cnf}"
453 rm -f "${tmp_openssl_cnf}"
455 crt_path="${BASEDIR}/certs/${domain}/cert-${timestamp}.pem"
456 sign_csr "$(< "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" )" ${altnames} 3>"${crt_path}"
458 # Create fullchain.pem
459 echo " + Creating fullchain.pem..."
460 cat "${crt_path}" > "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
461 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-${timestamp}.pem"
462 if ! grep -q "BEGIN CERTIFICATE" "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem"; then
463 openssl x509 -in "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" -inform DER -out "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" -outform PEM
465 cat "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" >> "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
468 [[ "${privkey}" = "privkey.pem" ]] || ln -sf "privkey-${timestamp}.pem" "${BASEDIR}/certs/${domain}/privkey.pem"
470 ln -sf "chain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/chain.pem"
471 ln -sf "fullchain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/fullchain.pem"
472 ln -sf "cert-${timestamp}.csr" "${BASEDIR}/certs/${domain}/cert.csr"
473 ln -sf "cert-${timestamp}.pem" "${BASEDIR}/certs/${domain}/cert.pem"
475 # Wait for hook script to clean the challenge and to deploy cert if used
476 [[ -n "${HOOK}" ]] && ${HOOK} "deploy_cert" "${domain}" "${BASEDIR}/certs/${domain}/privkey.pem" "${BASEDIR}/certs/${domain}/cert.pem" "${BASEDIR}/certs/${domain}/fullchain.pem" <&4 >&5 2>&6
478 unset challenge_token
483 # Description: Sign/renew non-existant/changed/expiring certificates.
484 command_sign_domains() {
487 if [[ -n "${PARAM_DOMAIN:-}" ]]; then
488 DOMAINS_TXT="$(mktemp -t XXXXXX)"
489 printf -- "${PARAM_DOMAIN}" > "${DOMAINS_TXT}"
490 elif [[ -e "${BASEDIR}/domains.txt" ]]; then
491 DOMAINS_TXT="${BASEDIR}/domains.txt"
493 _exiterr "domains.txt not found and --domain not given"
496 # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire
497 <"${DOMAINS_TXT}" _sed -e 's/^[[:space:]]*//g' -e 's/[[:space:]]*$//g' -e 's/[[:space:]]+/ /g' | (grep -vE '^(#|$)' || true) | while read -r line; do
498 domain="$(printf '%s\n' "${line}" | cut -d' ' -f1)"
499 morenames="$(printf '%s\n' "${line}" | cut -s -d' ' -f2-)"
500 cert="${BASEDIR}/certs/${domain}/cert.pem"
502 force_renew="${PARAM_FORCE:-no}"
504 if [[ -z "${morenames}" ]];then
505 echo "Processing ${domain}"
507 echo "Processing ${domain} with alternative names: ${morenames}"
510 if [[ -e "${cert}" ]]; then
511 printf " + Checking domain name(s) of existing cert..."
513 certnames="$(openssl x509 -in "${cert}" -text -noout | grep DNS: | _sed 's/DNS://g' | tr -d ' ' | tr ',' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//')"
514 givennames="$(echo "${domain}" "${morenames}"| tr ' ' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//' | _sed 's/^ //')"
516 if [[ "${certnames}" = "${givennames}" ]]; then
520 echo " + Domain name(s) are not matching!"
521 echo " + Names in old certificate: ${certnames}"
522 echo " + Configured names: ${givennames}"
523 echo " + Forcing renew."
528 if [[ -e "${cert}" ]]; then
529 echo " + Checking expire date of existing cert..."
530 valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )"
532 printf " + Valid till %s " "${valid}"
533 if openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; then
534 printf "(Longer than %d days). " "${RENEW_DAYS}"
535 if [[ "${force_renew}" = "yes" ]]; then
536 echo "Ignoring because renew was forced!"
542 echo "(Less than ${RENEW_DAYS} days). Renewing!"
546 # shellcheck disable=SC2086
550 # remove temporary domains.txt file if used
551 [[ -n "${PARAM_DOMAIN:-}" ]] && rm -f "${DOMAINS_TXT}"
556 # Usage: --signcsr (-s) path/to/csr.pem
557 # Description: Sign a given CSR, output CRT on stdout (advanced usage)
559 # redirect stdout to stderr
560 # leave stdout over at fd 3 to output the cert
566 if [ ! -r "${csrfile}" ]; then
567 _exiterr "Could not read certificate signing request ${csrfile}"
570 sign_csr "$(< "${csrfile}" )"
575 # Usage: --revoke (-r) path/to/cert.pem
576 # Description: Revoke specified certificate
580 [[ -n "${CA_REVOKE_CERT}" ]] || _exiterr "Certificate authority doesn't allow certificate revocation."
583 if [[ -L "${cert}" ]]; then
584 # follow symlink and use real certificate name (so we move the real file and not the symlink at the end)
586 link_target="$(readlink -n "${cert}")"
587 if [[ "${link_target}" =~ ^/ ]]; then
588 cert="${link_target}"
590 cert="$(dirname "${cert}")/${link_target}"
593 [[ -f "${cert}" ]] || _exiterr "Could not find certificate ${cert}"
595 echo "Revoking ${cert}"
597 cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)"
598 response="$(signed_request "${CA_REVOKE_CERT}" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}')"
599 # if there is a problem with our revoke request _request (via signed_request) will report this and "exit 1" out
600 # so if we are here, it is safe to assume the request was successful
602 echo " + Renaming certificate to ${cert}-revoked"
603 mv -f "${cert}" "${cert}-revoked"
607 # Description: Show help text
609 printf "Usage: %s [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...\n\n" "${0}"
610 printf "Default command: help\n\n"
612 grep -e '^[[:space:]]*# Usage:' -e '^[[:space:]]*# Description:' -e '^command_.*()[[:space:]]*{' "${0}" | while read -r usage; read -r description; read -r command; do
613 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]] || [[ ! "${command}" =~ ^command_ ]]; then
614 _exiterr "Error generating help text."
616 printf " %-32s %s\n" "${usage##"# Usage: "}" "${description##"# Description: "}"
618 printf -- "\nParameters:\n"
619 grep -E -e '^[[:space:]]*# PARAM_Usage:' -e '^[[:space:]]*# PARAM_Description:' "${0}" | while read -r usage; read -r description; do
620 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]]; then
621 _exiterr "Error generating help text."
623 printf " %-32s %s\n" "${usage##"# PARAM_Usage: "}" "${description##"# PARAM_Description: "}"
628 # Description: Output configuration variables for use in other scripts
630 echo "# letsencrypt.sh configuration"
632 typeset -p CA LICENSE CHALLENGETYPE HOOK RENEW_DAYS PRIVATE_KEY KEYSIZE WELLKNOWN PRIVATE_KEY_RENEW OPENSSL_CNF CONTACT_EMAIL LOCKFILE
635 # Main method (parses script arguments and calls command_* methods)
639 [[ -z "${COMMAND}" ]] || _exiterr "Only one command can be executed at a time. See help (-h) for more information."
644 if [[ -z "${1:-}" ]]; then
645 echo "The specified command requires additional parameters. See help:" >&2
649 elif [[ "${1:0:1}" = "-" ]]; then
650 _exiterr "Invalid argument: ${1}"
654 [[ -z "${@}" ]] && eval set -- "--help"
656 while (( "${#}" )); do
668 set_command sign_domains
674 check_parameters "${1:-}"
681 check_parameters "${1:-}"
682 PARAM_REVOKECERT="${1}"
685 # PARAM_Usage: --domain (-d) domain.tld
686 # PARAM_Description: Use specified domain name(s) instead of domains.txt entry (one certificate!)
689 check_parameters "${1:-}"
690 if [[ -z "${PARAM_DOMAIN:-}" ]]; then
693 PARAM_DOMAIN="${PARAM_DOMAIN} ${1}"
698 # PARAM_Usage: --force (-x)
699 # PARAM_Description: Force renew of certificate even if it is longer valid than value in RENEW_DAYS
704 # PARAM_Usage: --privkey (-p) path/to/key.pem
705 # PARAM_Description: Use specified private key instead of account key (useful for revocation)
708 check_parameters "${1:-}"
709 PARAM_PRIVATE_KEY="${1}"
712 # PARAM_Usage: --config (-f) path/to/config.sh
713 # PARAM_Description: Use specified config file
716 check_parameters "${1:-}"
720 # PARAM_Usage: --hook (-k) path/to/hook.sh
721 # PARAM_Description: Use specified script for hooks
724 check_parameters "${1:-}"
728 # PARAM_Usage: --challenge (-t) http-01|dns-01
729 # PARAM_Description: Which challenge should be used? Currently http-01 and dns-01 are supported
732 check_parameters "${1:-}"
733 PARAM_CHALLENGETYPE="${1}"
736 # PARAM_Usage: --algo (-a) rsa|prime256v1|secp384r1
737 # PARAM_Description: Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
740 check_parameters "${1:-}"
741 PARAM_KEY_ALGO="${1}"
745 echo "Unknown parameter detected: ${1}" >&2
757 sign_domains) command_sign_domains;;
758 sign_csr) command_sign_csr "${PARAM_CSR}";;
759 revoke) command_revoke "${PARAM_REVOKECERT}";;
760 *) command_help; exit 1;;
767 # Check for missing dependencies