3 # letsencrypt.sh by lukas2511
4 # Source: https://github.com/lukas2511/letsencrypt.sh
6 # This script is licensed under The MIT License (see LICENSE for more information).
11 [[ -n "${ZSH_VERSION:-}" ]] && set -o SH_WORD_SPLIT && set +o FUNCTION_ARGZERO
12 umask 077 # paranoid umask, we're creating private keys
14 # Find directory in which this script is stored by traversing all symbolic links
16 while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
17 DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
18 SOURCE="$(readlink "$SOURCE")"
19 [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
21 SCRIPTDIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
23 BASEDIR="${SCRIPTDIR}"
25 # Check for script dependencies
26 check_dependencies() {
27 # just execute some dummy and/or version commands to see if required tools exist and are actually usable
28 openssl version > /dev/null 2>&1 || _exiterr "This script requires an openssl binary."
29 _sed "" < /dev/null > /dev/null 2>&1 || _exiterr "This script requires sed with support for extended (modern) regular expressions."
30 command -v grep > /dev/null 2>&1 || _exiterr "This script requires grep."
31 mktemp -u -t XXXXXX > /dev/null 2>&1 || _exiterr "This script requires mktemp."
33 # curl returns with an error code in some ancient versions so we have to catch that
35 curl -V > /dev/null 2>&1
38 if [[ ! "${retcode}" = "0" ]] && [[ ! "${retcode}" = "2" ]]; then
39 _exiterr "This script requires curl."
43 # Setup default config values, search for and load configuration files
45 # Check for config in various locations
46 if [[ -z "${CONFIG:-}" ]]; then
47 for check_config in "/etc/letsencrypt.sh" "/usr/local/etc/letsencrypt.sh" "${PWD}" "${SCRIPTDIR}"; do
48 if [[ -e "${check_config}/config.sh" ]]; then
49 BASEDIR="${check_config}"
50 CONFIG="${check_config}/config.sh"
57 CA="https://acme-v01.api.letsencrypt.org/directory"
58 LICENSE="https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf"
59 CHALLENGETYPE="http-01"
68 PRIVATE_KEY_RENEW="no"
70 OPENSSL_CNF="$(openssl version -d | cut -d\" -f2)/openssl.cnf"
74 if [[ -z "${CONFIG:-}" ]]; then
76 echo "# !! WARNING !! No main config file found, using default config!" >&2
78 elif [[ -e "${CONFIG}" ]]; then
79 echo "# INFO: Using main config file ${CONFIG}"
80 BASEDIR="$(dirname "${CONFIG}")"
81 # shellcheck disable=SC1090
84 _exiterr "Specified config file doesn't exist."
87 if [[ -n "${CONFIG_D}" ]]; then
88 if [[ ! -d "${CONFIG_D}" ]]; then
89 _exiterr "The path ${CONFIG_D} specified for CONFIG_D does not point to a directory." >&2
92 for check_config_d in "${CONFIG_D}"/*.sh; do
93 if [[ ! -e "${check_config_d}" ]]; then
94 echo "# !! WARNING !! Extra configuration directory ${CONFIG_D} exists, but no configuration found in it." >&2
96 elif [[ -f "${check_config_d}" ]] && [[ -r "${check_config_d}" ]]; then
97 echo "# INFO: Using additional config file ${check_config_d}"
98 # shellcheck disable=SC1090
101 _exiterr "Specified additional config ${check_config_d} is not readable or not a file at all." >&2
106 # Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality.
107 BASEDIR="${BASEDIR%%/}"
109 # Check BASEDIR and set default variables
110 [[ -d "${BASEDIR}" ]] || _exiterr "BASEDIR does not exist: ${BASEDIR}"
112 [[ -z "${PRIVATE_KEY}" ]] && PRIVATE_KEY="${BASEDIR}/private_key.pem"
113 [[ -z "${PRIVATE_KEY_JSON}" ]] && PRIVATE_KEY_JSON="${BASEDIR}/private_key.json"
114 [[ -z "${WELLKNOWN}" ]] && WELLKNOWN="${BASEDIR}/.acme-challenges"
115 [[ -z "${LOCKFILE}" ]] && LOCKFILE="${BASEDIR}/lock"
117 [[ -n "${PARAM_HOOK:-}" ]] && HOOK="${PARAM_HOOK}"
118 [[ -n "${PARAM_CHALLENGETYPE:-}" ]] && CHALLENGETYPE="${PARAM_CHALLENGETYPE}"
119 [[ -n "${PARAM_KEY_ALGO:-}" ]] && KEY_ALGO="${PARAM_KEY_ALGO}"
121 [[ "${CHALLENGETYPE}" =~ (http-01|dns-01) ]] || _exiterr "Unknown challenge type ${CHALLENGETYPE}... can not continue."
122 if [[ "${CHALLENGETYPE}" = "dns-01" ]] && [[ -z "${HOOK}" ]]; then
123 _exiterr "Challenge type dns-01 needs a hook script for deployment... can not continue."
125 [[ "${KEY_ALGO}" =~ ^(rsa|prime256v1|secp384r1)$ ]] || _exiterr "Unknown public key algorithm ${KEY_ALGO}... can not continue."
132 # Lockfile handling (prevents concurrent access)
133 LOCKDIR="$(dirname "${LOCKFILE}")"
134 [[ -w "${LOCKDIR}" ]] || _exiterr "Directory ${LOCKDIR} for LOCKFILE ${LOCKFILE} is not writable, aborting."
135 ( set -C; date > "${LOCKFILE}" ) 2>/dev/null || _exiterr "Lock file '${LOCKFILE}' present, aborting."
136 remove_lock() { rm -f "${LOCKFILE}"; }
137 trap 'remove_lock' EXIT
140 CA_DIRECTORY="$(http_request get "${CA}")"
141 CA_NEW_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-cert)" &&
142 CA_NEW_AUTHZ="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-authz)" &&
143 CA_NEW_REG="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-reg)" &&
144 # shellcheck disable=SC2015
145 CA_REVOKE_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value revoke-cert)" ||
146 _exiterr "Problem retrieving ACME/CA-URLs, check if your configured CA points to the directory entrypoint."
148 # Export some environment variables to be used in hook script
149 export WELLKNOWN BASEDIR CONFIG
151 # Checking for private key ...
152 register_new_key="no"
153 if [[ -n "${PARAM_PRIVATE_KEY:-}" ]]; then
154 # a private key was specified from the command line so use it for this run
155 echo "Using private key ${PARAM_PRIVATE_KEY} instead of account key"
156 PRIVATE_KEY="${PARAM_PRIVATE_KEY}"
158 # Check if private account key exists, if it doesn't exist yet generate a new one (rsa key)
159 if [[ ! -e "${PRIVATE_KEY}" ]]; then
160 echo "+ Generating account key..."
161 _openssl genrsa -out "${PRIVATE_KEY}" "${KEYSIZE}"
162 register_new_key="yes"
165 openssl rsa -in "${PRIVATE_KEY}" -check 2>/dev/null > /dev/null || _exiterr "Private key is not valid, can not continue."
167 # Get public components from private key and calculate thumbprint
168 pubExponent64="$(printf '%x' "$(openssl rsa -in "${PRIVATE_KEY}" -noout -text | awk '/publicExponent/ {print $2}')" | hex2bin | urlbase64)"
169 pubMod64="$(openssl rsa -in "${PRIVATE_KEY}" -noout -modulus | cut -d'=' -f2 | hex2bin | urlbase64)"
171 thumbprint="$(printf '{"e":"%s","kty":"RSA","n":"%s"}' "${pubExponent64}" "${pubMod64}" | openssl dgst -sha256 -binary | urlbase64)"
173 # If we generated a new private key in the step above we have to register it with the acme-server
174 if [[ "${register_new_key}" = "yes" ]]; then
175 echo "+ Registering account key with letsencrypt..."
176 [[ ! -z "${CA_NEW_REG}" ]] || _exiterr "Certificate authority doesn't allow registrations."
177 # If an email for the contact has been provided then adding it to the registration request
178 if [[ -n "${CONTACT_EMAIL}" ]]; then
179 signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > "${PRIVATE_KEY_JSON}"
181 signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > "${PRIVATE_KEY_JSON}"
185 if [[ "${CHALLENGETYPE}" = "http-01" && ! -d "${WELLKNOWN}" ]]; then
186 _exiterr "WELLKNOWN directory doesn't exist, please create ${WELLKNOWN} and set appropriate permissions."
190 # Different sed version for different os types...
192 if [[ "${OSTYPE}" = "Linux" ]]; then
199 # Print error message and exit with error
201 echo "ERROR: ${1}" >&2
205 # Encode data as url-safe formatted base64
207 # urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_'
208 openssl base64 -e | tr -d '\n\r' | _sed -e 's:=*$::g' -e 'y:+/:-_:'
211 # Convert hex string to binary data
213 # Remove spaces, add leading zero, escape as hex string and parse with printf
214 printf -- "$(cat | _sed -e 's/[[:space:]]//g' -e 's/^(.(.{2})*)$/0\1/' -e 's/(.{2})/\\x\1/g')"
217 # Get string value from json dictionary
218 get_json_string_value() {
220 filter=$(printf 's/.*"%s": *"\([^"]*\)".*/\\1/p' "$1")
224 # OpenSSL writes to stderr/stdout even when there are no errors. So just
225 # display the output if the exit code was != 0 to simplify debugging.
228 out="$(openssl "${@}" 2>&1)"
231 if [[ ${res} -ne 0 ]]; then
232 echo " + ERROR: failed to run $* (Exitcode: ${res})" >&2
241 # Send http(s) request with specified method
243 tempcont="$(mktemp -t XXXXXX)"
246 if [[ "${1}" = "head" ]]; then
247 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)"
249 elif [[ "${1}" = "get" ]]; then
250 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}")"
252 elif [[ "${1}" = "post" ]]; then
253 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")"
257 _exiterr "Unknown request method: ${1}"
261 if [[ ! "${curlret}" = "0" ]]; then
262 _exiterr "Problem connecting to server (curl returned with ${curlret})"
265 if [[ ! "${statuscode:0:1}" = "2" ]]; then
266 echo " + ERROR: An error occurred while sending ${1}-request to ${2} (Status ${statuscode})" >&2
269 cat "${tempcont}" >&2
272 # Wait for hook script to clean the challenge if used
273 if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token:+set}" ]]; then
274 "${HOOK}" "clean_challenge" '' "${challenge_token}" "${keyauth}"
277 # remove temporary domains.txt file if used
278 [[ -n "${PARAM_DOMAIN:-}" && -n "${DOMAINS_TXT:-}" ]] && rm "${DOMAINS_TXT}"
286 # Send signed request
288 # Encode payload as urlbase64
289 payload64="$(printf '%s' "${2}" | urlbase64)"
291 # Retrieve nonce from acme-server
292 nonce="$(http_request head "${CA}" | grep Replay-Nonce: | awk -F ': ' '{print $2}' | tr -d '\n\r')"
294 # Build header with just our public key and algorithm information
295 header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}'
297 # Build another header which also contains the previously received nonce and encode it as urlbase64
298 protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}'
299 protected64="$(printf '%s' "${protected}" | urlbase64)"
301 # Sign header with nonce and our payload with our private key and encode signature as urlbase64
302 signed64="$(printf '%s' "${protected64}.${payload64}" | openssl dgst -sha256 -sign "${PRIVATE_KEY}" | urlbase64)"
304 # Send header + extended header + payload + signature to the acme-server
305 data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
307 http_request post "${1}" "${data}"
310 # Extracts all subject names from a CSR
311 # Outputs either the CN, or the SANs, one per line
313 csr="${1}" # the CSR itself (not a file)
315 if ! <<<"${csr}" openssl req -verify -noout 2>/dev/null; then
316 _exiterr "Certificate signing request isn't valid"
319 reqtext="$( <<<"${csr}" openssl req -noout -text )"
320 if <<<"${reqtext}" grep -q '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$'; then
321 # SANs used, extract these
322 altnames="$( <<<"${reqtext}" grep -A1 '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$' | tail -n1 )"
323 # split to one per line:
324 # shellcheck disable=SC1003
325 altnames="$( <<<"${altnames}" _sed -e 's/^[[:space:]]*//; s/, /\'$'\n''/g' )"
326 # we can only get DNS: ones signed
327 if grep -qv '^DNS:' <<<"${altnames}"; then
328 _exiterr "Certificate signing request contains non-DNS Subject Alternative Names"
330 # strip away the DNS: prefix
331 altnames="$( <<<"${altnames}" _sed -e 's/^DNS://' )"
335 # No SANs, extract CN
336 altnames="$( <<<"${reqtext}" grep '^[[:space:]]*Subject:' | _sed -e 's/.* CN=([^ /,]*).*/\1/' )"
341 # Create certificate for domain(s) and outputs it FD 3
343 csr="${1}" # the CSR itself (not a file)
345 if { true >&3; } 2>/dev/null; then
348 _exiterr "sign_csr: FD 3 not open"
353 if [ -z "${altnames}" ]; then
354 altnames="$( extract_altnames "${csr}" )"
357 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
358 _exiterr "Certificate authority doesn't allow certificate signing"
362 if [[ -n "${ZSH_VERSION:-}" ]]; then
363 local -A challenge_uris challenge_tokens keyauths deploy_args
365 local -a challenge_uris challenge_tokens keyauths deploy_args
369 for altname in ${altnames}; do
370 # Ask the acme-server for new challenge token and extract them from the resulting json block
371 echo " + Requesting challenge for ${altname}..."
372 response="$(signed_request "${CA_NEW_AUTHZ}" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}')"
374 challenges="$(printf '%s\n' "${response}" | sed -n 's/.*\("challenges":[^\[]*\[[^]]*]\).*/\1/p')"
375 repl=$'\n''{' # fix syntax highlighting in Vim
376 challenge="$(printf "%s" "${challenges//\{/${repl}}" | grep \""${CHALLENGETYPE}"\")"
377 challenge_token="$(printf '%s' "${challenge}" | get_json_string_value token | _sed 's/[^A-Za-z0-9_\-]/_/g')"
378 challenge_uri="$(printf '%s' "${challenge}" | get_json_string_value uri)"
380 if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then
381 _exiterr "Can't retrieve challenges (${response})"
384 # Challenge response consists of the challenge token and the thumbprint of our public certificate
385 keyauth="${challenge_token}.${thumbprint}"
387 case "${CHALLENGETYPE}" in
389 # Store challenge response in well-known location and make world-readable (so that a webserver can access it)
390 printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}"
391 chmod a+r "${WELLKNOWN}/${challenge_token}"
392 keyauth_hook="${keyauth}"
395 # Generate DNS entry content for dns-01 validation
396 keyauth_hook="$(printf '%s' "${keyauth}" | openssl dgst -sha256 -binary | urlbase64)"
400 challenge_uris[${idx}]="${challenge_uri}"
401 keyauths[${idx}]="${keyauth}"
402 challenge_tokens[${idx}]="${challenge_token}"
403 # Note: assumes args will never have spaces!
404 deploy_args[${idx}]="${altname} ${challenge_token} ${keyauth_hook}"
408 # Wait for hook script to deploy the challenges if used
409 # shellcheck disable=SC2068
410 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[@]}
412 # Respond to challenges
414 for altname in ${altnames}; do
415 challenge_token="${challenge_tokens[${idx}]}"
416 keyauth="${keyauths[${idx}]}"
418 # Wait for hook script to deploy the challenge if used
419 # shellcheck disable=SC2086
420 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[${idx}]}
422 # Ask the acme-server to verify our challenge and wait until it is no longer pending
423 echo " + Responding to challenge for ${altname}..."
424 result="$(signed_request "${challenge_uris[${idx}]}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}')"
426 reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
428 while [[ "${reqstatus}" = "pending" ]]; do
430 result="$(http_request get "${challenge_uris[${idx}]}")"
431 reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
434 [[ "${CHALLENGETYPE}" = "http-01" ]] && rm -f "${WELLKNOWN}/${challenge_token}"
436 # Wait for hook script to clean the challenge if used
437 if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token}" ]]; then
438 # shellcheck disable=SC2086
439 "${HOOK}" "clean_challenge" ${deploy_args[${idx}]}
443 if [[ "${reqstatus}" = "valid" ]]; then
444 echo " + Challenge is valid!"
450 # Wait for hook script to clean the challenges if used
451 # shellcheck disable=SC2068
452 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "clean_challenge" ${deploy_args[@]}
454 if [[ "${reqstatus}" != "valid" ]]; then
455 # Clean up any remaining challenge_tokens if we stopped early
456 if [[ "${CHALLENGETYPE}" = "http-01" ]]; then
457 while [ ${idx} -lt ${#challenge_tokens[@]} ]; do
458 rm -f "${WELLKNOWN}/${challenge_tokens[${idx}]}"
463 _exiterr "Challenge is invalid! (returned: ${reqstatus}) (result: ${result})"
466 # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem
467 echo " + Requesting certificate..."
468 csr64="$( <<<"${csr}" openssl req -outform DER | urlbase64)"
469 crt64="$(signed_request "${CA_NEW_CERT}" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)"
470 crt="$( printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" )"
472 # Try to load the certificate to detect corruption
473 echo " + Checking certificate..."
474 _openssl x509 -text <<<"${crt}"
478 unset challenge_token
482 # Create certificate for domain(s)
486 timestamp="$(date +%s)"
488 echo " + Signing domains..."
489 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
490 _exiterr "Certificate authority doesn't allow certificate signing"
493 # If there is no existing certificate directory => make it
494 if [[ ! -e "${BASEDIR}/certs/${domain}" ]]; then
495 echo " + Creating new directory ${BASEDIR}/certs/${domain} ..."
496 mkdir -p "${BASEDIR}/certs/${domain}"
499 privkey="privkey.pem"
500 # generate a new private key if we need or want one
501 if [[ ! -r "${BASEDIR}/certs/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
502 echo " + Generating private key..."
503 privkey="privkey-${timestamp}.pem"
504 case "${KEY_ALGO}" in
505 rsa) _openssl genrsa -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}";;
506 prime256v1|secp384r1) _openssl ecparam -genkey -name "${KEY_ALGO}" -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem";;
510 # Generate signing request config and the actual signing request
511 echo " + Generating signing request..."
513 for altname in ${altnames}; do
514 SAN+="DNS:${altname}, "
517 local tmp_openssl_cnf
518 tmp_openssl_cnf="$(mktemp -t XXXXXX)"
519 cat "${OPENSSL_CNF}" > "${tmp_openssl_cnf}"
520 printf "[SAN]\nsubjectAltName=%s" "${SAN}" >> "${tmp_openssl_cnf}"
521 openssl req -new -sha256 -key "${BASEDIR}/certs/${domain}/${privkey}" -out "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" -subj "/CN=${domain}/" -reqexts SAN -config "${tmp_openssl_cnf}"
522 rm -f "${tmp_openssl_cnf}"
524 crt_path="${BASEDIR}/certs/${domain}/cert-${timestamp}.pem"
525 # shellcheck disable=SC2086
526 sign_csr "$(< "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" )" ${altnames} 3>"${crt_path}"
528 # Create fullchain.pem
529 echo " + Creating fullchain.pem..."
530 cat "${crt_path}" > "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
531 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-${timestamp}.pem"
532 if ! grep -q "BEGIN CERTIFICATE" "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem"; then
533 openssl x509 -in "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" -inform DER -out "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" -outform PEM
535 cat "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" >> "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
538 [[ "${privkey}" = "privkey.pem" ]] || ln -sf "privkey-${timestamp}.pem" "${BASEDIR}/certs/${domain}/privkey.pem"
540 ln -sf "chain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/chain.pem"
541 ln -sf "fullchain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/fullchain.pem"
542 ln -sf "cert-${timestamp}.csr" "${BASEDIR}/certs/${domain}/cert.csr"
543 ln -sf "cert-${timestamp}.pem" "${BASEDIR}/certs/${domain}/cert.pem"
545 # Wait for hook script to clean the challenge and to deploy cert if used
546 [[ -n "${HOOK}" ]] && "${HOOK}" "deploy_cert" "${domain}" "${BASEDIR}/certs/${domain}/privkey.pem" "${BASEDIR}/certs/${domain}/cert.pem" "${BASEDIR}/certs/${domain}/fullchain.pem" "${BASEDIR}/certs/${domain}/chain.pem"
548 unset challenge_token
553 # Description: Sign/renew non-existant/changed/expiring certificates.
554 command_sign_domains() {
557 if [[ -n "${PARAM_DOMAIN:-}" ]]; then
558 DOMAINS_TXT="$(mktemp -t XXXXXX)"
559 printf -- "${PARAM_DOMAIN}" > "${DOMAINS_TXT}"
560 elif [[ -e "${BASEDIR}/domains.txt" ]]; then
561 DOMAINS_TXT="${BASEDIR}/domains.txt"
563 _exiterr "domains.txt not found and --domain not given"
566 # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire
569 for line in $(<"${DOMAINS_TXT}" tr -d '\r' | _sed -e 's/^[[:space:]]*//g' -e 's/[[:space:]]*$//g' -e 's/[[:space:]]+/ /g' | (grep -vE '^(#|$)' || true)); do
571 domain="$(printf '%s\n' "${line}" | cut -d' ' -f1)"
572 morenames="$(printf '%s\n' "${line}" | cut -s -d' ' -f2-)"
573 cert="${BASEDIR}/certs/${domain}/cert.pem"
575 force_renew="${PARAM_FORCE:-no}"
577 if [[ -z "${morenames}" ]];then
578 echo "Processing ${domain}"
580 echo "Processing ${domain} with alternative names: ${morenames}"
583 if [[ -e "${cert}" ]]; then
584 printf " + Checking domain name(s) of existing cert..."
586 certnames="$(openssl x509 -in "${cert}" -text -noout | grep DNS: | _sed 's/DNS://g' | tr -d ' ' | tr ',' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//')"
587 givennames="$(echo "${domain}" "${morenames}"| tr ' ' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//' | _sed 's/^ //')"
589 if [[ "${certnames}" = "${givennames}" ]]; then
593 echo " + Domain name(s) are not matching!"
594 echo " + Names in old certificate: ${certnames}"
595 echo " + Configured names: ${givennames}"
596 echo " + Forcing renew."
601 if [[ -e "${cert}" ]]; then
602 echo " + Checking expire date of existing cert..."
603 valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )"
605 printf " + Valid till %s " "${valid}"
606 if openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; then
607 printf "(Longer than %d days). " "${RENEW_DAYS}"
608 if [[ "${force_renew}" = "yes" ]]; then
609 echo "Ignoring because renew was forced!"
611 # Certificate-Names unchanged and cert is still valid
612 echo "Skipping renew!"
613 [[ -n "${HOOK}" ]] && "${HOOK}" "unchanged_cert" "${domain}" "${BASEDIR}/certs/${domain}/privkey.pem" "${BASEDIR}/certs/${domain}/cert.pem" "${BASEDIR}/certs/${domain}/fullchain.pem" "${BASEDIR}/certs/${domain}/chain.pem"
617 echo "(Less than ${RENEW_DAYS} days). Renewing!"
621 # shellcheck disable=SC2086
625 # remove temporary domains.txt file if used
626 [[ -n "${PARAM_DOMAIN:-}" ]] && rm -f "${DOMAINS_TXT}"
631 # Usage: --signcsr (-s) path/to/csr.pem
632 # Description: Sign a given CSR, output CRT on stdout (advanced usage)
634 # redirect stdout to stderr
635 # leave stdout over at fd 3 to output the cert
641 if [ ! -r "${csrfile}" ]; then
642 _exiterr "Could not read certificate signing request ${csrfile}"
645 sign_csr "$(< "${csrfile}" )"
650 # Usage: --revoke (-r) path/to/cert.pem
651 # Description: Revoke specified certificate
655 [[ -n "${CA_REVOKE_CERT}" ]] || _exiterr "Certificate authority doesn't allow certificate revocation."
658 if [[ -L "${cert}" ]]; then
659 # follow symlink and use real certificate name (so we move the real file and not the symlink at the end)
661 link_target="$(readlink -n "${cert}")"
662 if [[ "${link_target}" =~ ^/ ]]; then
663 cert="${link_target}"
665 cert="$(dirname "${cert}")/${link_target}"
668 [[ -f "${cert}" ]] || _exiterr "Could not find certificate ${cert}"
670 echo "Revoking ${cert}"
672 cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)"
673 response="$(signed_request "${CA_REVOKE_CERT}" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}')"
674 # if there is a problem with our revoke request _request (via signed_request) will report this and "exit 1" out
675 # so if we are here, it is safe to assume the request was successful
677 echo " + Renaming certificate to ${cert}-revoked"
678 mv -f "${cert}" "${cert}-revoked"
681 # Usage: --cleanup (-gc)
682 # Description: Move unused certificate files to archive directory
686 # Create global archive directory if not existant
687 if [[ ! -e "${BASEDIR}/archive" ]]; then
688 mkdir "${BASEDIR}/archive"
691 # Loop over all certificate directories
692 for certdir in "${BASEDIR}/certs/"*; do
693 # Skip if entry is not a folder
694 [[ -d "${certdir}" ]] || continue
696 # Get certificate name
697 certname="$(basename "${certdir}")"
699 # Create certitifaces archive directory if not existant
700 archivedir="${BASEDIR}/archive/${certname}"
701 if [[ ! -e "${archivedir}" ]]; then
702 mkdir "${archivedir}"
705 # Loop over file-types (certificates, keys, signing-requests, ...)
706 for filetype in cert.csr cert.pem chain.pem fullchain.pem privkey.pem; do
707 # Skip if symlink is broken
708 [[ -r "${certdir}/${filetype}" ]] || continue
710 # Look up current file in use
711 current="$(basename "$(readlink "${certdir}/${filetype}")")"
713 # Split filetype into name and extension
714 filebase="$(echo "${filetype}" | cut -d. -f1)"
715 fileext="$(echo "${filetype}" | cut -d. -f2)"
717 # Loop over all files of this type
718 for file in "${certdir}/${filebase}-"*".${fileext}"; do
719 # Handle case where no files match the wildcard
720 [[ -f "${file}" ]] || break
722 # Check if current file is in use, if unused move to archive directory
723 filename="$(basename "${file}")"
724 if [[ ! "${filename}" = "${current}" ]]; then
725 echo "Moving unused file to archive directory: ${certname}/${filename}"
726 mv "${certdir}/${filename}" "${archivedir}/${filename}"
736 # Description: Show help text
738 printf "Usage: %s [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...\n\n" "${0}"
739 printf "Default command: help\n\n"
741 grep -e '^[[:space:]]*# Usage:' -e '^[[:space:]]*# Description:' -e '^command_.*()[[:space:]]*{' "${0}" | while read -r usage; read -r description; read -r command; do
742 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]] || [[ ! "${command}" =~ ^command_ ]]; then
743 _exiterr "Error generating help text."
745 printf " %-32s %s\n" "${usage##"# Usage: "}" "${description##"# Description: "}"
747 printf -- "\nParameters:\n"
748 grep -E -e '^[[:space:]]*# PARAM_Usage:' -e '^[[:space:]]*# PARAM_Description:' "${0}" | while read -r usage; read -r description; do
749 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]]; then
750 _exiterr "Error generating help text."
752 printf " %-32s %s\n" "${usage##"# PARAM_Usage: "}" "${description##"# PARAM_Description: "}"
757 # Description: Output configuration variables for use in other scripts
759 echo "# letsencrypt.sh configuration"
761 typeset -p CA LICENSE CHALLENGETYPE HOOK HOOK_CHAIN RENEW_DAYS PRIVATE_KEY KEYSIZE WELLKNOWN PRIVATE_KEY_RENEW OPENSSL_CNF CONTACT_EMAIL LOCKFILE
764 # Main method (parses script arguments and calls command_* methods)
768 [[ -z "${COMMAND}" ]] || _exiterr "Only one command can be executed at a time. See help (-h) for more information."
773 if [[ -z "${1:-}" ]]; then
774 echo "The specified command requires additional parameters. See help:" >&2
778 elif [[ "${1:0:1}" = "-" ]]; then
779 _exiterr "Invalid argument: ${1}"
783 [[ -z "${@}" ]] && eval set -- "--help"
797 set_command sign_domains
803 check_parameters "${1:-}"
810 check_parameters "${1:-}"
811 PARAM_REVOKECERT="${1}"
818 # PARAM_Usage: --domain (-d) domain.tld
819 # PARAM_Description: Use specified domain name(s) instead of domains.txt entry (one certificate!)
822 check_parameters "${1:-}"
823 if [[ -z "${PARAM_DOMAIN:-}" ]]; then
826 PARAM_DOMAIN="${PARAM_DOMAIN} ${1}"
831 # PARAM_Usage: --force (-x)
832 # PARAM_Description: Force renew of certificate even if it is longer valid than value in RENEW_DAYS
837 # PARAM_Usage: --privkey (-p) path/to/key.pem
838 # PARAM_Description: Use specified private key instead of account key (useful for revocation)
841 check_parameters "${1:-}"
842 PARAM_PRIVATE_KEY="${1}"
845 # PARAM_Usage: --config (-f) path/to/config.sh
846 # PARAM_Description: Use specified config file
849 check_parameters "${1:-}"
853 # PARAM_Usage: --hook (-k) path/to/hook.sh
854 # PARAM_Description: Use specified script for hooks
857 check_parameters "${1:-}"
861 # PARAM_Usage: --challenge (-t) http-01|dns-01
862 # PARAM_Description: Which challenge should be used? Currently http-01 and dns-01 are supported
865 check_parameters "${1:-}"
866 PARAM_CHALLENGETYPE="${1}"
869 # PARAM_Usage: --algo (-a) rsa|prime256v1|secp384r1
870 # PARAM_Description: Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
873 check_parameters "${1:-}"
874 PARAM_KEY_ALGO="${1}"
878 echo "Unknown parameter detected: ${1}" >&2
890 sign_domains) command_sign_domains;;
891 sign_csr) command_sign_csr "${PARAM_CSR}";;
892 revoke) command_revoke "${PARAM_REVOKECERT}";;
893 cleanup) command_cleanup;;
894 *) command_help; exit 1;;
901 # Check for missing dependencies