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 # Create (identifiable) temporary files
27 # shellcheck disable=SC2068
28 mktemp ${@:-} "${TMPDIR:-/tmp}/letsencrypt.sh-XXXXXX"
31 # Check for script dependencies
32 check_dependencies() {
33 # just execute some dummy and/or version commands to see if required tools exist and are actually usable
34 openssl version > /dev/null 2>&1 || _exiterr "This script requires an openssl binary."
35 _sed "" < /dev/null > /dev/null 2>&1 || _exiterr "This script requires sed with support for extended (modern) regular expressions."
36 command -v grep > /dev/null 2>&1 || _exiterr "This script requires grep."
37 _mktemp -u > /dev/null 2>&1 || _exiterr "This script requires mktemp."
39 # curl returns with an error code in some ancient versions so we have to catch that
41 curl -V > /dev/null 2>&1
44 if [[ ! "${retcode}" = "0" ]] && [[ ! "${retcode}" = "2" ]]; then
45 _exiterr "This script requires curl."
49 # Setup default config values, search for and load configuration files
51 # Check for config in various locations
52 if [[ -z "${CONFIG:-}" ]]; then
53 for check_config in "/etc/letsencrypt.sh" "/usr/local/etc/letsencrypt.sh" "${PWD}" "${SCRIPTDIR}"; do
54 if [[ -e "${check_config}/config" ]]; then
55 BASEDIR="${check_config}"
56 CONFIG="${check_config}/config"
63 CA="https://acme-v01.api.letsencrypt.org/directory"
64 LICENSE="https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf"
65 CHALLENGETYPE="http-01"
75 PRIVATE_KEY_RENEW="yes"
77 OPENSSL_CNF="$(openssl version -d | cut -d\" -f2)/openssl.cnf"
81 if [[ -z "${CONFIG:-}" ]]; then
83 echo "# !! WARNING !! No main config file found, using default config!" >&2
85 elif [[ -e "${CONFIG}" ]]; then
86 echo "# INFO: Using main config file ${CONFIG}"
87 BASEDIR="$(dirname "${CONFIG}")"
88 # shellcheck disable=SC1090
91 _exiterr "Specified config file doesn't exist."
94 if [[ -n "${CONFIG_D}" ]]; then
95 if [[ ! -d "${CONFIG_D}" ]]; then
96 _exiterr "The path ${CONFIG_D} specified for CONFIG_D does not point to a directory." >&2
99 for check_config_d in "${CONFIG_D}"/*.sh; do
100 if [[ ! -e "${check_config_d}" ]]; then
101 echo "# !! WARNING !! Extra configuration directory ${CONFIG_D} exists, but no configuration found in it." >&2
103 elif [[ -f "${check_config_d}" ]] && [[ -r "${check_config_d}" ]]; then
104 echo "# INFO: Using additional config file ${check_config_d}"
105 # shellcheck disable=SC1090
106 . "${check_config_d}"
108 _exiterr "Specified additional config ${check_config_d} is not readable or not a file at all." >&2
113 # Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality.
114 BASEDIR="${BASEDIR%%/}"
116 # Check BASEDIR and set default variables
117 [[ -d "${BASEDIR}" ]] || _exiterr "BASEDIR does not exist: ${BASEDIR}"
119 [[ -z "${ACCOUNT_KEY}" ]] && ACCOUNT_KEY="${BASEDIR}/private_key.pem"
120 [[ -z "${ACCOUNT_KEY_JSON}" ]] && ACCOUNT_KEY_JSON="${BASEDIR}/private_key.json"
121 [[ -z "${DOMAINS_TXT}" ]] && DOMAINS_TXT="${BASEDIR}/domains.txt"
122 [[ -z "${WELLKNOWN}" ]] && WELLKNOWN="${BASEDIR}/.acme-challenges"
123 [[ -z "${LOCKFILE}" ]] && LOCKFILE="${BASEDIR}/lock"
125 [[ -n "${PARAM_HOOK:-}" ]] && HOOK="${PARAM_HOOK}"
126 [[ -n "${PARAM_CHALLENGETYPE:-}" ]] && CHALLENGETYPE="${PARAM_CHALLENGETYPE}"
127 [[ -n "${PARAM_KEY_ALGO:-}" ]] && KEY_ALGO="${PARAM_KEY_ALGO}"
129 [[ "${CHALLENGETYPE}" =~ (http-01|dns-01) ]] || _exiterr "Unknown challenge type ${CHALLENGETYPE}... can not continue."
130 if [[ "${CHALLENGETYPE}" = "dns-01" ]] && [[ -z "${HOOK}" ]]; then
131 _exiterr "Challenge type dns-01 needs a hook script for deployment... can not continue."
133 [[ "${KEY_ALGO}" =~ ^(rsa|prime256v1|secp384r1)$ ]] || _exiterr "Unknown public key algorithm ${KEY_ALGO}... can not continue."
140 # Lockfile handling (prevents concurrent access)
141 LOCKDIR="$(dirname "${LOCKFILE}")"
142 [[ -w "${LOCKDIR}" ]] || _exiterr "Directory ${LOCKDIR} for LOCKFILE ${LOCKFILE} is not writable, aborting."
143 ( set -C; date > "${LOCKFILE}" ) 2>/dev/null || _exiterr "Lock file '${LOCKFILE}' present, aborting."
144 remove_lock() { rm -f "${LOCKFILE}"; }
145 trap 'remove_lock' EXIT
148 CA_DIRECTORY="$(http_request get "${CA}")"
149 CA_NEW_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-cert)" &&
150 CA_NEW_AUTHZ="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-authz)" &&
151 CA_NEW_REG="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-reg)" &&
152 # shellcheck disable=SC2015
153 CA_REVOKE_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value revoke-cert)" ||
154 _exiterr "Problem retrieving ACME/CA-URLs, check if your configured CA points to the directory entrypoint."
156 # Export some environment variables to be used in hook script
157 export WELLKNOWN BASEDIR CONFIG
159 # Checking for private key ...
160 register_new_key="no"
161 if [[ -n "${PARAM_ACCOUNT_KEY:-}" ]]; then
162 # a private key was specified from the command line so use it for this run
163 echo "Using private key ${PARAM_ACCOUNT_KEY} instead of account key"
164 ACCOUNT_KEY="${PARAM_ACCOUNT_KEY}"
165 ACCOUNT_KEY_JSON="${PARAM_ACCOUNT_KEY}.json"
167 # Check if private account key exists, if it doesn't exist yet generate a new one (rsa key)
168 if [[ ! -e "${ACCOUNT_KEY}" ]]; then
169 echo "+ Generating account key..."
170 _openssl genrsa -out "${ACCOUNT_KEY}" "${KEYSIZE}"
171 register_new_key="yes"
174 openssl rsa -in "${ACCOUNT_KEY}" -check 2>/dev/null > /dev/null || _exiterr "Account key is not valid, can not continue."
176 # Get public components from private key and calculate thumbprint
177 pubExponent64="$(printf '%x' "$(openssl rsa -in "${ACCOUNT_KEY}" -noout -text | awk '/publicExponent/ {print $2}')" | hex2bin | urlbase64)"
178 pubMod64="$(openssl rsa -in "${ACCOUNT_KEY}" -noout -modulus | cut -d'=' -f2 | hex2bin | urlbase64)"
180 thumbprint="$(printf '{"e":"%s","kty":"RSA","n":"%s"}' "${pubExponent64}" "${pubMod64}" | openssl dgst -sha256 -binary | urlbase64)"
182 # If we generated a new private key in the step above we have to register it with the acme-server
183 if [[ "${register_new_key}" = "yes" ]]; then
184 echo "+ Registering account key with letsencrypt..."
185 [[ ! -z "${CA_NEW_REG}" ]] || _exiterr "Certificate authority doesn't allow registrations."
186 # If an email for the contact has been provided then adding it to the registration request
187 if [[ -n "${CONTACT_EMAIL}" ]]; then
188 signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > "${ACCOUNT_KEY_JSON}"
190 signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > "${ACCOUNT_KEY_JSON}"
194 if [[ "${CHALLENGETYPE}" = "http-01" && ! -d "${WELLKNOWN}" ]]; then
195 _exiterr "WELLKNOWN directory doesn't exist, please create ${WELLKNOWN} and set appropriate permissions."
199 # Different sed version for different os types...
201 if [[ "${OSTYPE}" = "Linux" ]]; then
208 # Print error message and exit with error
210 echo "ERROR: ${1}" >&2
214 # Remove newlines and whitespace from json
216 tr -d '\r\n' | _sed -e 's/ +/ /g' -e 's/\{ /{/g' -e 's/ \}/}/g' -e 's/\[ /[/g' -e 's/ \]/]/g'
219 # Encode data as url-safe formatted base64
221 # urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_'
222 openssl base64 -e | tr -d '\n\r' | _sed -e 's:=*$::g' -e 'y:+/:-_:'
225 # Convert hex string to binary data
227 # Remove spaces, add leading zero, escape as hex string and parse with printf
228 printf -- "$(cat | _sed -e 's/[[:space:]]//g' -e 's/^(.(.{2})*)$/0\1/' -e 's/(.{2})/\\x\1/g')"
231 # Get string value from json dictionary
232 get_json_string_value() {
234 filter=$(printf 's/.*"%s": *"\([^"]*\)".*/\\1/p' "$1")
238 # OpenSSL writes to stderr/stdout even when there are no errors. So just
239 # display the output if the exit code was != 0 to simplify debugging.
242 out="$(openssl "${@}" 2>&1)"
245 if [[ ${res} -ne 0 ]]; then
246 echo " + ERROR: failed to run $* (Exitcode: ${res})" >&2
255 # Send http(s) request with specified method
257 tempcont="$(_mktemp)"
260 if [[ "${1}" = "head" ]]; then
261 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)"
263 elif [[ "${1}" = "get" ]]; then
264 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}")"
266 elif [[ "${1}" = "post" ]]; then
267 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")"
271 _exiterr "Unknown request method: ${1}"
275 if [[ ! "${curlret}" = "0" ]]; then
276 _exiterr "Problem connecting to server (curl returned with ${curlret})"
279 if [[ ! "${statuscode:0:1}" = "2" ]]; then
280 echo " + ERROR: An error occurred while sending ${1}-request to ${2} (Status ${statuscode})" >&2
283 cat "${tempcont}" >&2
286 # Wait for hook script to clean the challenge if used
287 if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token:+set}" ]]; then
288 "${HOOK}" "clean_challenge" '' "${challenge_token}" "${keyauth}"
291 # remove temporary domains.txt file if used
292 [[ -n "${PARAM_DOMAIN:-}" && -n "${DOMAINS_TXT:-}" ]] && rm "${DOMAINS_TXT}"
300 # Send signed request
302 # Encode payload as urlbase64
303 payload64="$(printf '%s' "${2}" | urlbase64)"
305 # Retrieve nonce from acme-server
306 nonce="$(http_request head "${CA}" | grep Replay-Nonce: | awk -F ': ' '{print $2}' | tr -d '\n\r')"
308 # Build header with just our public key and algorithm information
309 header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}'
311 # Build another header which also contains the previously received nonce and encode it as urlbase64
312 protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}'
313 protected64="$(printf '%s' "${protected}" | urlbase64)"
315 # Sign header with nonce and our payload with our private key and encode signature as urlbase64
316 signed64="$(printf '%s' "${protected64}.${payload64}" | openssl dgst -sha256 -sign "${ACCOUNT_KEY}" | urlbase64)"
318 # Send header + extended header + payload + signature to the acme-server
319 data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
321 http_request post "${1}" "${data}"
324 # Extracts all subject names from a CSR
325 # Outputs either the CN, or the SANs, one per line
327 csr="${1}" # the CSR itself (not a file)
329 if ! <<<"${csr}" openssl req -verify -noout 2>/dev/null; then
330 _exiterr "Certificate signing request isn't valid"
333 reqtext="$( <<<"${csr}" openssl req -noout -text )"
334 if <<<"${reqtext}" grep -q '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$'; then
335 # SANs used, extract these
336 altnames="$( <<<"${reqtext}" grep -A1 '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$' | tail -n1 )"
337 # split to one per line:
338 # shellcheck disable=SC1003
339 altnames="$( <<<"${altnames}" _sed -e 's/^[[:space:]]*//; s/, /\'$'\n''/g' )"
340 # we can only get DNS: ones signed
341 if grep -qv '^DNS:' <<<"${altnames}"; then
342 _exiterr "Certificate signing request contains non-DNS Subject Alternative Names"
344 # strip away the DNS: prefix
345 altnames="$( <<<"${altnames}" _sed -e 's/^DNS://' )"
349 # No SANs, extract CN
350 altnames="$( <<<"${reqtext}" grep '^[[:space:]]*Subject:' | _sed -e 's/.* CN=([^ /,]*).*/\1/' )"
355 # Create certificate for domain(s) and outputs it FD 3
357 csr="${1}" # the CSR itself (not a file)
359 if { true >&3; } 2>/dev/null; then
362 _exiterr "sign_csr: FD 3 not open"
367 if [ -z "${altnames}" ]; then
368 altnames="$( extract_altnames "${csr}" )"
371 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
372 _exiterr "Certificate authority doesn't allow certificate signing"
376 if [[ -n "${ZSH_VERSION:-}" ]]; then
377 local -A challenge_uris challenge_tokens keyauths deploy_args
379 local -a challenge_uris challenge_tokens keyauths deploy_args
383 for altname in ${altnames}; do
384 # Ask the acme-server for new challenge token and extract them from the resulting json block
385 echo " + Requesting challenge for ${altname}..."
386 response="$(signed_request "${CA_NEW_AUTHZ}" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}' | clean_json)"
388 challenges="$(printf '%s\n' "${response}" | sed -n 's/.*\("challenges":[^\[]*\[[^]]*]\).*/\1/p')"
389 repl=$'\n''{' # fix syntax highlighting in Vim
390 challenge="$(printf "%s" "${challenges//\{/${repl}}" | grep \""${CHALLENGETYPE}"\")"
391 challenge_token="$(printf '%s' "${challenge}" | get_json_string_value token | _sed 's/[^A-Za-z0-9_\-]/_/g')"
392 challenge_uri="$(printf '%s' "${challenge}" | get_json_string_value uri)"
394 if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then
395 _exiterr "Can't retrieve challenges (${response})"
398 # Challenge response consists of the challenge token and the thumbprint of our public certificate
399 keyauth="${challenge_token}.${thumbprint}"
401 case "${CHALLENGETYPE}" in
403 # Store challenge response in well-known location and make world-readable (so that a webserver can access it)
404 printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}"
405 chmod a+r "${WELLKNOWN}/${challenge_token}"
406 keyauth_hook="${keyauth}"
409 # Generate DNS entry content for dns-01 validation
410 keyauth_hook="$(printf '%s' "${keyauth}" | openssl dgst -sha256 -binary | urlbase64)"
414 challenge_uris[${idx}]="${challenge_uri}"
415 keyauths[${idx}]="${keyauth}"
416 challenge_tokens[${idx}]="${challenge_token}"
417 # Note: assumes args will never have spaces!
418 deploy_args[${idx}]="${altname} ${challenge_token} ${keyauth_hook}"
422 # Wait for hook script to deploy the challenges if used
423 # shellcheck disable=SC2068
424 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[@]}
426 # Respond to challenges
428 for altname in ${altnames}; do
429 challenge_token="${challenge_tokens[${idx}]}"
430 keyauth="${keyauths[${idx}]}"
432 # Wait for hook script to deploy the challenge if used
433 # shellcheck disable=SC2086
434 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[${idx}]}
436 # Ask the acme-server to verify our challenge and wait until it is no longer pending
437 echo " + Responding to challenge for ${altname}..."
438 result="$(signed_request "${challenge_uris[${idx}]}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}' | clean_json)"
440 reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
442 while [[ "${reqstatus}" = "pending" ]]; do
444 result="$(http_request get "${challenge_uris[${idx}]}")"
445 reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
448 [[ "${CHALLENGETYPE}" = "http-01" ]] && rm -f "${WELLKNOWN}/${challenge_token}"
450 # Wait for hook script to clean the challenge if used
451 if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token}" ]]; then
452 # shellcheck disable=SC2086
453 "${HOOK}" "clean_challenge" ${deploy_args[${idx}]}
457 if [[ "${reqstatus}" = "valid" ]]; then
458 echo " + Challenge is valid!"
464 # Wait for hook script to clean the challenges if used
465 # shellcheck disable=SC2068
466 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "clean_challenge" ${deploy_args[@]}
468 if [[ "${reqstatus}" != "valid" ]]; then
469 # Clean up any remaining challenge_tokens if we stopped early
470 if [[ "${CHALLENGETYPE}" = "http-01" ]]; then
471 while [ ${idx} -lt ${#challenge_tokens[@]} ]; do
472 rm -f "${WELLKNOWN}/${challenge_tokens[${idx}]}"
477 _exiterr "Challenge is invalid! (returned: ${reqstatus}) (result: ${result})"
480 # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem
481 echo " + Requesting certificate..."
482 csr64="$( <<<"${csr}" openssl req -outform DER | urlbase64)"
483 crt64="$(signed_request "${CA_NEW_CERT}" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)"
484 crt="$( printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" )"
486 # Try to load the certificate to detect corruption
487 echo " + Checking certificate..."
488 _openssl x509 -text <<<"${crt}"
492 unset challenge_token
496 # Create certificate for domain(s)
500 timestamp="$(date +%s)"
502 echo " + Signing domains..."
503 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
504 _exiterr "Certificate authority doesn't allow certificate signing"
507 # If there is no existing certificate directory => make it
508 if [[ ! -e "${BASEDIR}/certs/${domain}" ]]; then
509 echo " + Creating new directory ${BASEDIR}/certs/${domain} ..."
510 mkdir -p "${BASEDIR}/certs/${domain}"
513 privkey="privkey.pem"
514 # generate a new private key if we need or want one
515 if [[ ! -r "${BASEDIR}/certs/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
516 echo " + Generating private key..."
517 privkey="privkey-${timestamp}.pem"
518 case "${KEY_ALGO}" in
519 rsa) _openssl genrsa -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}";;
520 prime256v1|secp384r1) _openssl ecparam -genkey -name "${KEY_ALGO}" -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem";;
524 # Generate signing request config and the actual signing request
525 echo " + Generating signing request..."
527 for altname in ${altnames}; do
528 SAN+="DNS:${altname}, "
531 local tmp_openssl_cnf
532 tmp_openssl_cnf="$(_mktemp)"
533 cat "${OPENSSL_CNF}" > "${tmp_openssl_cnf}"
534 printf "[SAN]\nsubjectAltName=%s" "${SAN}" >> "${tmp_openssl_cnf}"
535 openssl req -new -sha256 -key "${BASEDIR}/certs/${domain}/${privkey}" -out "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" -subj "/CN=${domain}/" -reqexts SAN -config "${tmp_openssl_cnf}"
536 rm -f "${tmp_openssl_cnf}"
538 crt_path="${BASEDIR}/certs/${domain}/cert-${timestamp}.pem"
539 # shellcheck disable=SC2086
540 sign_csr "$(< "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" )" ${altnames} 3>"${crt_path}"
542 # Create fullchain.pem
543 echo " + Creating fullchain.pem..."
544 cat "${crt_path}" > "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
545 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-${timestamp}.pem"
546 if ! grep -q "BEGIN CERTIFICATE" "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem"; then
547 openssl x509 -in "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" -inform DER -out "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" -outform PEM
549 cat "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" >> "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
552 [[ "${privkey}" = "privkey.pem" ]] || ln -sf "privkey-${timestamp}.pem" "${BASEDIR}/certs/${domain}/privkey.pem"
554 ln -sf "chain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/chain.pem"
555 ln -sf "fullchain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/fullchain.pem"
556 ln -sf "cert-${timestamp}.csr" "${BASEDIR}/certs/${domain}/cert.csr"
557 ln -sf "cert-${timestamp}.pem" "${BASEDIR}/certs/${domain}/cert.pem"
559 # Wait for hook script to clean the challenge and to deploy cert if used
561 [[ -n "${HOOK}" ]] && "${HOOK}" "deploy_cert" "${domain}" "${BASEDIR}/certs/${domain}/privkey.pem" "${BASEDIR}/certs/${domain}/cert.pem" "${BASEDIR}/certs/${domain}/fullchain.pem" "${BASEDIR}/certs/${domain}/chain.pem" "${timestamp}"
563 unset challenge_token
568 # Description: Sign/renew non-existant/changed/expiring certificates.
569 command_sign_domains() {
572 if [[ -n "${PARAM_DOMAIN:-}" ]]; then
573 DOMAINS_TXT="$(_mktemp)"
574 printf -- "${PARAM_DOMAIN}" > "${DOMAINS_TXT}"
575 elif [[ -e "${DOMAINS_TXT}" ]]; then
576 if [[ ! -r "${DOMAINS_TXT}" ]]; then
577 _exiterr "domains.txt found but not readable"
580 _exiterr "domains.txt not found and --domain not given"
583 # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire
586 for line in $(<"${DOMAINS_TXT}" tr -d '\r' | tr '[:upper:]' '[:lower:]' | _sed -e 's/^[[:space:]]*//g' -e 's/[[:space:]]*$//g' -e 's/[[:space:]]+/ /g' | (grep -vE '^(#|$)' || true)); do
588 domain="$(printf '%s\n' "${line}" | cut -d' ' -f1)"
589 morenames="$(printf '%s\n' "${line}" | cut -s -d' ' -f2-)"
590 cert="${BASEDIR}/certs/${domain}/cert.pem"
592 force_renew="${PARAM_FORCE:-no}"
594 if [[ -z "${morenames}" ]];then
595 echo "Processing ${domain}"
597 echo "Processing ${domain} with alternative names: ${morenames}"
600 if [[ -e "${cert}" ]]; then
601 printf " + Checking domain name(s) of existing cert..."
603 certnames="$(openssl x509 -in "${cert}" -text -noout | grep DNS: | _sed 's/DNS://g' | tr -d ' ' | tr ',' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//')"
604 givennames="$(echo "${domain}" "${morenames}"| tr ' ' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//' | _sed 's/^ //')"
606 if [[ "${certnames}" = "${givennames}" ]]; then
610 echo " + Domain name(s) are not matching!"
611 echo " + Names in old certificate: ${certnames}"
612 echo " + Configured names: ${givennames}"
613 echo " + Forcing renew."
618 if [[ -e "${cert}" ]]; then
619 echo " + Checking expire date of existing cert..."
620 valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )"
622 printf " + Valid till %s " "${valid}"
623 if openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; then
624 printf "(Longer than %d days). " "${RENEW_DAYS}"
625 if [[ "${force_renew}" = "yes" ]]; then
626 echo "Ignoring because renew was forced!"
628 # Certificate-Names unchanged and cert is still valid
629 echo "Skipping renew!"
630 [[ -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"
634 echo "(Less than ${RENEW_DAYS} days). Renewing!"
638 # shellcheck disable=SC2086
642 # remove temporary domains.txt file if used
643 [[ -n "${PARAM_DOMAIN:-}" ]] && rm -f "${DOMAINS_TXT}"
648 # Usage: --signcsr (-s) path/to/csr.pem
649 # Description: Sign a given CSR, output CRT on stdout (advanced usage)
651 # redirect stdout to stderr
652 # leave stdout over at fd 3 to output the cert
658 if [ ! -r "${csrfile}" ]; then
659 _exiterr "Could not read certificate signing request ${csrfile}"
662 sign_csr "$(< "${csrfile}" )"
667 # Usage: --revoke (-r) path/to/cert.pem
668 # Description: Revoke specified certificate
672 [[ -n "${CA_REVOKE_CERT}" ]] || _exiterr "Certificate authority doesn't allow certificate revocation."
675 if [[ -L "${cert}" ]]; then
676 # follow symlink and use real certificate name (so we move the real file and not the symlink at the end)
678 link_target="$(readlink -n "${cert}")"
679 if [[ "${link_target}" =~ ^/ ]]; then
680 cert="${link_target}"
682 cert="$(dirname "${cert}")/${link_target}"
685 [[ -f "${cert}" ]] || _exiterr "Could not find certificate ${cert}"
687 echo "Revoking ${cert}"
689 cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)"
690 response="$(signed_request "${CA_REVOKE_CERT}" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}' | clean_json)"
691 # if there is a problem with our revoke request _request (via signed_request) will report this and "exit 1" out
692 # so if we are here, it is safe to assume the request was successful
694 echo " + Renaming certificate to ${cert}-revoked"
695 mv -f "${cert}" "${cert}-revoked"
698 # Usage: --cleanup (-gc)
699 # Description: Move unused certificate files to archive directory
703 # Create global archive directory if not existant
704 if [[ ! -e "${BASEDIR}/archive" ]]; then
705 mkdir "${BASEDIR}/archive"
708 # Loop over all certificate directories
709 for certdir in "${BASEDIR}/certs/"*; do
710 # Skip if entry is not a folder
711 [[ -d "${certdir}" ]] || continue
713 # Get certificate name
714 certname="$(basename "${certdir}")"
716 # Create certitifaces archive directory if not existant
717 archivedir="${BASEDIR}/archive/${certname}"
718 if [[ ! -e "${archivedir}" ]]; then
719 mkdir "${archivedir}"
722 # Loop over file-types (certificates, keys, signing-requests, ...)
723 for filetype in cert.csr cert.pem chain.pem fullchain.pem privkey.pem; do
724 # Skip if symlink is broken
725 [[ -r "${certdir}/${filetype}" ]] || continue
727 # Look up current file in use
728 current="$(basename "$(readlink "${certdir}/${filetype}")")"
730 # Split filetype into name and extension
731 filebase="$(echo "${filetype}" | cut -d. -f1)"
732 fileext="$(echo "${filetype}" | cut -d. -f2)"
734 # Loop over all files of this type
735 for file in "${certdir}/${filebase}-"*".${fileext}"; do
736 # Handle case where no files match the wildcard
737 [[ -f "${file}" ]] || break
739 # Check if current file is in use, if unused move to archive directory
740 filename="$(basename "${file}")"
741 if [[ ! "${filename}" = "${current}" ]]; then
742 echo "Moving unused file to archive directory: ${certname}/${filename}"
743 mv "${certdir}/${filename}" "${archivedir}/${filename}"
753 # Description: Show help text
755 printf "Usage: %s [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...\n\n" "${0}"
756 printf "Default command: help\n\n"
758 grep -e '^[[:space:]]*# Usage:' -e '^[[:space:]]*# Description:' -e '^command_.*()[[:space:]]*{' "${0}" | while read -r usage; read -r description; read -r command; do
759 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]] || [[ ! "${command}" =~ ^command_ ]]; then
760 _exiterr "Error generating help text."
762 printf " %-32s %s\n" "${usage##"# Usage: "}" "${description##"# Description: "}"
764 printf -- "\nParameters:\n"
765 grep -E -e '^[[:space:]]*# PARAM_Usage:' -e '^[[:space:]]*# PARAM_Description:' "${0}" | while read -r usage; read -r description; do
766 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]]; then
767 _exiterr "Error generating help text."
769 printf " %-32s %s\n" "${usage##"# PARAM_Usage: "}" "${description##"# PARAM_Description: "}"
774 # Description: Output configuration variables for use in other scripts
776 echo "# letsencrypt.sh configuration"
778 typeset -p CA LICENSE CHALLENGETYPE DOMAINS_TXT HOOK HOOK_CHAIN RENEW_DAYS ACCOUNT_KEY ACCOUNT_KEY_JSON KEYSIZE WELLKNOWN PRIVATE_KEY_RENEW OPENSSL_CNF CONTACT_EMAIL LOCKFILE
781 # Main method (parses script arguments and calls command_* methods)
785 [[ -z "${COMMAND}" ]] || _exiterr "Only one command can be executed at a time. See help (-h) for more information."
790 if [[ -z "${1:-}" ]]; then
791 echo "The specified command requires additional parameters. See help:" >&2
795 elif [[ "${1:0:1}" = "-" ]]; then
796 _exiterr "Invalid argument: ${1}"
800 [[ -z "${@}" ]] && eval set -- "--help"
814 set_command sign_domains
820 check_parameters "${1:-}"
827 check_parameters "${1:-}"
828 PARAM_REVOKECERT="${1}"
835 # PARAM_Usage: --domain (-d) domain.tld
836 # PARAM_Description: Use specified domain name(s) instead of domains.txt entry (one certificate!)
839 check_parameters "${1:-}"
840 if [[ -z "${PARAM_DOMAIN:-}" ]]; then
843 PARAM_DOMAIN="${PARAM_DOMAIN} ${1}"
848 # PARAM_Usage: --force (-x)
849 # PARAM_Description: Force renew of certificate even if it is longer valid than value in RENEW_DAYS
854 # PARAM_Usage: --privkey (-p) path/to/key.pem
855 # PARAM_Description: Use specified private key instead of account key (useful for revocation)
858 check_parameters "${1:-}"
859 PARAM_ACCOUNT_KEY="${1}"
862 # PARAM_Usage: --config (-f) path/to/config
863 # PARAM_Description: Use specified config file
866 check_parameters "${1:-}"
870 # PARAM_Usage: --hook (-k) path/to/hook.sh
871 # PARAM_Description: Use specified script for hooks
874 check_parameters "${1:-}"
878 # PARAM_Usage: --challenge (-t) http-01|dns-01
879 # PARAM_Description: Which challenge should be used? Currently http-01 and dns-01 are supported
882 check_parameters "${1:-}"
883 PARAM_CHALLENGETYPE="${1}"
886 # PARAM_Usage: --algo (-a) rsa|prime256v1|secp384r1
887 # PARAM_Description: Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
890 check_parameters "${1:-}"
891 PARAM_KEY_ALGO="${1}"
895 echo "Unknown parameter detected: ${1}" >&2
907 sign_domains) command_sign_domains;;
908 sign_csr) command_sign_csr "${PARAM_CSR}";;
909 revoke) command_revoke "${PARAM_REVOKECERT}";;
910 cleanup) command_cleanup;;
911 *) command_help; exit 1;;
918 # Check for missing dependencies