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."
38 diff -u /dev/null /dev/null || _exiterr "This script requires diff."
40 # curl returns with an error code in some ancient versions so we have to catch that
42 curl -V > /dev/null 2>&1
45 if [[ ! "${retcode}" = "0" ]] && [[ ! "${retcode}" = "2" ]]; then
46 _exiterr "This script requires curl."
51 __KEY_ALGO="${KEY_ALGO}"
52 __OCSP_MUST_STAPLE="${OCSP_MUST_STAPLE}"
53 __PRIVATE_KEY_RENEW="${PRIVATE_KEY_RENEW}"
54 __KEYSIZE="${KEYSIZE}"
55 __CHALLENGETYPE="${CHALLENGETYPE}"
57 __WELLKNOWN="${WELLKNOWN}"
58 __HOOK_CHAIN="${HOOK_CHAIN}"
59 __OPENSSL_CNF="${OPENSSL_CNF}"
60 __RENEW_DAYS="${RENEW_DAYS}"
61 __IP_VERSION="${IP_VERSION}"
65 KEY_ALGO="${__KEY_ALGO}"
66 OCSP_MUST_STAPLE="${__OCSP_MUST_STAPLE}"
67 PRIVATE_KEY_RENEW="${__PRIVATE_KEY_RENEW}"
68 KEYSIZE="${__KEYSIZE}"
69 CHALLENGETYPE="${__CHALLENGETYPE}"
71 WELLKNOWN="${__WELLKNOWN}"
72 HOOK_CHAIN="${__HOOK_CHAIN}"
73 OPENSSL_CNF="${__OPENSSL_CNF}"
74 RENEW_DAYS="${__RENEW_DAYS}"
75 IP_VERSION="${__IP_VERSION}"
78 # verify configuration values
80 [[ "${CHALLENGETYPE}" =~ (http-01|dns-01) ]] || _exiterr "Unknown challenge type ${CHALLENGETYPE}... can not continue."
81 if [[ "${CHALLENGETYPE}" = "dns-01" ]] && [[ -z "${HOOK}" ]]; then
82 _exiterr "Challenge type dns-01 needs a hook script for deployment... can not continue."
84 if [[ "${CHALLENGETYPE}" = "http-01" && ! -d "${WELLKNOWN}" ]]; then
85 _exiterr "WELLKNOWN directory doesn't exist, please create ${WELLKNOWN} and set appropriate permissions."
87 [[ "${KEY_ALGO}" =~ ^(rsa|prime256v1|secp384r1)$ ]] || _exiterr "Unknown public key algorithm ${KEY_ALGO}... can not continue."
88 if [[ -n "${IP_VERSION}" ]]; then
89 [[ "${IP_VERSION}" = "4" || "${IP_VERSION}" = "6" ]] || _exiterr "Unknown IP version ${IP_VERSION}... can not continue."
93 # Setup default config values, search for and load configuration files
95 # Check for config in various locations
96 if [[ -z "${CONFIG:-}" ]]; then
97 for check_config in "/etc/letsencrypt.sh" "/usr/local/etc/letsencrypt.sh" "${PWD}" "${SCRIPTDIR}"; do
98 if [[ -f "${check_config}/config" ]]; then
99 BASEDIR="${check_config}"
100 CONFIG="${check_config}/config"
107 CA="https://acme-v01.api.letsencrypt.org/directory"
108 LICENSE="https://letsencrypt.org/documents/LE-SA-v1.1.1-August-1-2016.pdf"
111 CHALLENGETYPE="http-01"
120 PRIVATE_KEY_RENEW="yes"
122 OPENSSL_CNF="$(openssl version -d | cut -d\" -f2)/openssl.cnf"
125 OCSP_MUST_STAPLE="no"
128 if [[ -z "${CONFIG:-}" ]]; then
130 echo "# !! WARNING !! No main config file found, using default config!" >&2
132 elif [[ -f "${CONFIG}" ]]; then
133 echo "# INFO: Using main config file ${CONFIG}"
134 BASEDIR="$(dirname "${CONFIG}")"
135 # shellcheck disable=SC1090
138 _exiterr "Specified config file doesn't exist."
141 if [[ -n "${CONFIG_D}" ]]; then
142 if [[ ! -d "${CONFIG_D}" ]]; then
143 _exiterr "The path ${CONFIG_D} specified for CONFIG_D does not point to a directory." >&2
146 for check_config_d in "${CONFIG_D}"/*.sh; do
147 if [[ ! -e "${check_config_d}" ]]; then
148 echo "# !! WARNING !! Extra configuration directory ${CONFIG_D} exists, but no configuration found in it." >&2
150 elif [[ -f "${check_config_d}" ]] && [[ -r "${check_config_d}" ]]; then
151 echo "# INFO: Using additional config file ${check_config_d}"
152 # shellcheck disable=SC1090
153 . "${check_config_d}"
155 _exiterr "Specified additional config ${check_config_d} is not readable or not a file at all." >&2
160 # Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality.
161 BASEDIR="${BASEDIR%%/}"
163 # Check BASEDIR and set default variables
164 [[ -d "${BASEDIR}" ]] || _exiterr "BASEDIR does not exist: ${BASEDIR}"
166 CAHASH="$(echo "${CA}" | urlbase64)"
167 [[ -z "${ACCOUNTDIR}" ]] && ACCOUNTDIR="${BASEDIR}/accounts"
168 mkdir -p "${ACCOUNTDIR}/${CAHASH}"
169 [[ -f "${ACCOUNTDIR}/${CAHASH}/config" ]] && . "${ACCOUNTDIR}/${CAHASH}/config"
170 ACCOUNT_KEY="${ACCOUNTDIR}/${CAHASH}/account_key.pem"
171 ACCOUNT_KEY_JSON="${ACCOUNTDIR}/${CAHASH}/registration_info.json"
173 if [[ -f "${BASEDIR}/private_key.pem" ]] && [[ ! -f "${ACCOUNT_KEY}" ]]; then
174 echo "! Moving private_key.pem to ${ACCOUNT_KEY}"
175 mv "${BASEDIR}/private_key.pem" "${ACCOUNT_KEY}"
177 if [[ -f "${BASEDIR}/private_key.json" ]] && [[ ! -f "${ACCOUNT_KEY_JSON}" ]]; then
178 echo "! Moving private_key.json to ${ACCOUNT_KEY_JSON}"
179 mv "${BASEDIR}/private_key.json" "${ACCOUNT_KEY_JSON}"
182 [[ -z "${CERTDIR}" ]] && CERTDIR="${BASEDIR}/certs"
183 [[ -z "${DOMAINS_TXT}" ]] && DOMAINS_TXT="${BASEDIR}/domains.txt"
184 [[ -z "${WELLKNOWN}" ]] && WELLKNOWN="/var/www/letsencrypt"
185 [[ -z "${LOCKFILE}" ]] && LOCKFILE="${BASEDIR}/lock"
186 [[ -n "${PARAM_NO_LOCK:-}" ]] && LOCKFILE=""
188 [[ -n "${PARAM_HOOK:-}" ]] && HOOK="${PARAM_HOOK}"
189 [[ -n "${PARAM_CERTDIR:-}" ]] && CERTDIR="${PARAM_CERTDIR}"
190 [[ -n "${PARAM_CHALLENGETYPE:-}" ]] && CHALLENGETYPE="${PARAM_CHALLENGETYPE}"
191 [[ -n "${PARAM_KEY_ALGO:-}" ]] && KEY_ALGO="${PARAM_KEY_ALGO}"
192 [[ -n "${PARAM_OCSP_MUST_STAPLE:-}" ]] && OCSP_MUST_STAPLE="${PARAM_OCSP_MUST_STAPLE}"
193 [[ -n "${PARAM_IP_VERSION:-}" ]] && IP_VERSION="${PARAM_IP_VERSION}"
203 # Lockfile handling (prevents concurrent access)
204 if [[ -n "${LOCKFILE}" ]]; then
205 LOCKDIR="$(dirname "${LOCKFILE}")"
206 [[ -w "${LOCKDIR}" ]] || _exiterr "Directory ${LOCKDIR} for LOCKFILE ${LOCKFILE} is not writable, aborting."
207 ( set -C; date > "${LOCKFILE}" ) 2>/dev/null || _exiterr "Lock file '${LOCKFILE}' present, aborting."
208 remove_lock() { rm -f "${LOCKFILE}"; }
209 trap 'remove_lock' EXIT
213 CA_DIRECTORY="$(http_request get "${CA}")"
214 CA_NEW_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-cert)" &&
215 CA_NEW_AUTHZ="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-authz)" &&
216 CA_NEW_REG="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-reg)" &&
217 # shellcheck disable=SC2015
218 CA_REVOKE_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value revoke-cert)" ||
219 _exiterr "Problem retrieving ACME/CA-URLs, check if your configured CA points to the directory entrypoint."
221 # Export some environment variables to be used in hook script
222 export WELLKNOWN BASEDIR CERTDIR CONFIG
224 # Checking for private key ...
225 register_new_key="no"
226 if [[ -n "${PARAM_ACCOUNT_KEY:-}" ]]; then
227 # a private key was specified from the command line so use it for this run
228 echo "Using private key ${PARAM_ACCOUNT_KEY} instead of account key"
229 ACCOUNT_KEY="${PARAM_ACCOUNT_KEY}"
230 ACCOUNT_KEY_JSON="${PARAM_ACCOUNT_KEY}.json"
232 # Check if private account key exists, if it doesn't exist yet generate a new one (rsa key)
233 if [[ ! -e "${ACCOUNT_KEY}" ]]; then
234 echo "+ Generating account key..."
235 _openssl genrsa -out "${ACCOUNT_KEY}" "${KEYSIZE}"
236 register_new_key="yes"
239 openssl rsa -in "${ACCOUNT_KEY}" -check 2>/dev/null > /dev/null || _exiterr "Account key is not valid, can not continue."
241 # Get public components from private key and calculate thumbprint
242 pubExponent64="$(printf '%x' "$(openssl rsa -in "${ACCOUNT_KEY}" -noout -text | awk '/publicExponent/ {print $2}')" | hex2bin | urlbase64)"
243 pubMod64="$(openssl rsa -in "${ACCOUNT_KEY}" -noout -modulus | cut -d'=' -f2 | hex2bin | urlbase64)"
245 thumbprint="$(printf '{"e":"%s","kty":"RSA","n":"%s"}' "${pubExponent64}" "${pubMod64}" | openssl dgst -sha256 -binary | urlbase64)"
247 # If we generated a new private key in the step above we have to register it with the acme-server
248 if [[ "${register_new_key}" = "yes" ]]; then
249 echo "+ Registering account key with letsencrypt..."
250 [[ ! -z "${CA_NEW_REG}" ]] || _exiterr "Certificate authority doesn't allow registrations."
251 # If an email for the contact has been provided then adding it to the registration request
253 if [[ -n "${CONTACT_EMAIL}" ]]; then
254 (signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > "${ACCOUNT_KEY_JSON}") || FAILED=true
256 (signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > "${ACCOUNT_KEY_JSON}") || FAILED=true
258 if [[ "${FAILED}" = "true" ]]; then
261 echo "Error registering account key. See message above for more information."
262 rm "${ACCOUNT_KEY}" "${ACCOUNT_KEY_JSON}"
269 # Different sed version for different os types...
271 if [[ "${OSTYPE}" = "Linux" ]]; then
278 # Print error message and exit with error
280 echo "ERROR: ${1}" >&2
284 # Remove newlines and whitespace from json
286 tr -d '\r\n' | _sed -e 's/ +/ /g' -e 's/\{ /{/g' -e 's/ \}/}/g' -e 's/\[ /[/g' -e 's/ \]/]/g'
289 # Encode data as url-safe formatted base64
291 # urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_'
292 openssl base64 -e | tr -d '\n\r' | _sed -e 's:=*$::g' -e 'y:+/:-_:'
295 # Convert hex string to binary data
297 # Remove spaces, add leading zero, escape as hex string and parse with printf
298 printf -- "$(cat | _sed -e 's/[[:space:]]//g' -e 's/^(.(.{2})*)$/0\1/' -e 's/(.{2})/\\x\1/g')"
301 # Get string value from json dictionary
302 get_json_string_value() {
304 filter=$(printf 's/.*"%s": *"\([^"]*\)".*/\\1/p' "$1")
308 # OpenSSL writes to stderr/stdout even when there are no errors. So just
309 # display the output if the exit code was != 0 to simplify debugging.
312 out="$(openssl "${@}" 2>&1)"
315 if [[ ${res} -ne 0 ]]; then
316 echo " + ERROR: failed to run $* (Exitcode: ${res})" >&2
325 # Send http(s) request with specified method
327 tempcont="$(_mktemp)"
329 if [[ -n "${IP_VERSION:-}" ]]; then
330 ip_version="-${IP_VERSION}"
334 if [[ "${1}" = "head" ]]; then
335 statuscode="$(curl ${ip_version:-} -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)"
337 elif [[ "${1}" = "get" ]]; then
338 statuscode="$(curl ${ip_version:-} -s -w "%{http_code}" -o "${tempcont}" "${2}")"
340 elif [[ "${1}" = "post" ]]; then
341 statuscode="$(curl ${ip_version:-} -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")"
345 _exiterr "Unknown request method: ${1}"
349 if [[ ! "${curlret}" = "0" ]]; then
350 _exiterr "Problem connecting to server (${1} for ${2}; curl returned with ${curlret})"
353 if [[ ! "${statuscode:0:1}" = "2" ]]; then
354 echo " + ERROR: An error occurred while sending ${1}-request to ${2} (Status ${statuscode})" >&2
357 cat "${tempcont}" >&2
360 # Wait for hook script to clean the challenge if used
361 if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token:+set}" ]]; then
362 "${HOOK}" "clean_challenge" '' "${challenge_token}" "${keyauth}"
365 # remove temporary domains.txt file if used
366 [[ -n "${PARAM_DOMAIN:-}" && -n "${DOMAINS_TXT:-}" ]] && rm "${DOMAINS_TXT}"
374 # Send signed request
376 # Encode payload as urlbase64
377 payload64="$(printf '%s' "${2}" | urlbase64)"
379 # Retrieve nonce from acme-server
380 nonce="$(http_request head "${CA}" | grep Replay-Nonce: | awk -F ': ' '{print $2}' | tr -d '\n\r')"
382 # Build header with just our public key and algorithm information
383 header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}'
385 # Build another header which also contains the previously received nonce and encode it as urlbase64
386 protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}'
387 protected64="$(printf '%s' "${protected}" | urlbase64)"
389 # Sign header with nonce and our payload with our private key and encode signature as urlbase64
390 signed64="$(printf '%s' "${protected64}.${payload64}" | openssl dgst -sha256 -sign "${ACCOUNT_KEY}" | urlbase64)"
392 # Send header + extended header + payload + signature to the acme-server
393 data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
395 http_request post "${1}" "${data}"
398 # Extracts all subject names from a CSR
399 # Outputs either the CN, or the SANs, one per line
401 csr="${1}" # the CSR itself (not a file)
403 if ! <<<"${csr}" openssl req -verify -noout 2>/dev/null; then
404 _exiterr "Certificate signing request isn't valid"
407 reqtext="$( <<<"${csr}" openssl req -noout -text )"
408 if <<<"${reqtext}" grep -q '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$'; then
409 # SANs used, extract these
410 altnames="$( <<<"${reqtext}" grep -A1 '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$' | tail -n1 )"
411 # split to one per line:
412 # shellcheck disable=SC1003
413 altnames="$( <<<"${altnames}" _sed -e 's/^[[:space:]]*//; s/, /\'$'\n''/g' )"
414 # we can only get DNS: ones signed
415 if grep -qv '^DNS:' <<<"${altnames}"; then
416 _exiterr "Certificate signing request contains non-DNS Subject Alternative Names"
418 # strip away the DNS: prefix
419 altnames="$( <<<"${altnames}" _sed -e 's/^DNS://' )"
423 # No SANs, extract CN
424 altnames="$( <<<"${reqtext}" grep '^[[:space:]]*Subject:' | _sed -e 's/.* CN=([^ /,]*).*/\1/' )"
429 # Create certificate for domain(s) and outputs it FD 3
431 csr="${1}" # the CSR itself (not a file)
433 if { true >&3; } 2>/dev/null; then
436 _exiterr "sign_csr: FD 3 not open"
441 if [ -z "${altnames}" ]; then
442 altnames="$( extract_altnames "${csr}" )"
445 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
446 _exiterr "Certificate authority doesn't allow certificate signing"
450 if [[ -n "${ZSH_VERSION:-}" ]]; then
451 local -A challenge_uris challenge_tokens keyauths deploy_args
453 local -a challenge_uris challenge_tokens keyauths deploy_args
457 for altname in ${altnames}; do
458 # Ask the acme-server for new challenge token and extract them from the resulting json block
459 echo " + Requesting challenge for ${altname}..."
460 response="$(signed_request "${CA_NEW_AUTHZ}" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}' | clean_json)"
462 challenges="$(printf '%s\n' "${response}" | sed -n 's/.*\("challenges":[^\[]*\[[^]]*]\).*/\1/p')"
463 repl=$'\n''{' # fix syntax highlighting in Vim
464 challenge="$(printf "%s" "${challenges//\{/${repl}}" | grep \""${CHALLENGETYPE}"\")"
465 challenge_token="$(printf '%s' "${challenge}" | get_json_string_value token | _sed 's/[^A-Za-z0-9_\-]/_/g')"
466 challenge_uri="$(printf '%s' "${challenge}" | get_json_string_value uri)"
468 if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then
469 _exiterr "Can't retrieve challenges (${response})"
472 # Challenge response consists of the challenge token and the thumbprint of our public certificate
473 keyauth="${challenge_token}.${thumbprint}"
475 case "${CHALLENGETYPE}" in
477 # Store challenge response in well-known location and make world-readable (so that a webserver can access it)
478 printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}"
479 chmod a+r "${WELLKNOWN}/${challenge_token}"
480 keyauth_hook="${keyauth}"
483 # Generate DNS entry content for dns-01 validation
484 keyauth_hook="$(printf '%s' "${keyauth}" | openssl dgst -sha256 -binary | urlbase64)"
488 challenge_uris[${idx}]="${challenge_uri}"
489 keyauths[${idx}]="${keyauth}"
490 challenge_tokens[${idx}]="${challenge_token}"
491 # Note: assumes args will never have spaces!
492 deploy_args[${idx}]="${altname} ${challenge_token} ${keyauth_hook}"
496 # Wait for hook script to deploy the challenges if used
497 # shellcheck disable=SC2068
498 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[@]}
500 # Respond to challenges
502 for altname in ${altnames}; do
503 challenge_token="${challenge_tokens[${idx}]}"
504 keyauth="${keyauths[${idx}]}"
506 # Wait for hook script to deploy the challenge if used
507 # shellcheck disable=SC2086
508 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[${idx}]}
510 # Ask the acme-server to verify our challenge and wait until it is no longer pending
511 echo " + Responding to challenge for ${altname}..."
512 result="$(signed_request "${challenge_uris[${idx}]}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}' | clean_json)"
514 reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
516 while [[ "${reqstatus}" = "pending" ]]; do
518 result="$(http_request get "${challenge_uris[${idx}]}")"
519 reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
522 [[ "${CHALLENGETYPE}" = "http-01" ]] && rm -f "${WELLKNOWN}/${challenge_token}"
524 # Wait for hook script to clean the challenge if used
525 if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token}" ]]; then
526 # shellcheck disable=SC2086
527 "${HOOK}" "clean_challenge" ${deploy_args[${idx}]}
531 if [[ "${reqstatus}" = "valid" ]]; then
532 echo " + Challenge is valid!"
538 # Wait for hook script to clean the challenges if used
539 # shellcheck disable=SC2068
540 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "clean_challenge" ${deploy_args[@]}
542 if [[ "${reqstatus}" != "valid" ]]; then
543 # Clean up any remaining challenge_tokens if we stopped early
544 if [[ "${CHALLENGETYPE}" = "http-01" ]]; then
545 while [ ${idx} -lt ${#challenge_tokens[@]} ]; do
546 rm -f "${WELLKNOWN}/${challenge_tokens[${idx}]}"
551 _exiterr "Challenge is invalid! (returned: ${reqstatus}) (result: ${result})"
554 # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem
555 echo " + Requesting certificate..."
556 csr64="$( <<<"${csr}" openssl req -outform DER | urlbase64)"
557 crt64="$(signed_request "${CA_NEW_CERT}" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)"
558 crt="$( printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" )"
560 # Try to load the certificate to detect corruption
561 echo " + Checking certificate..."
562 _openssl x509 -text <<<"${crt}"
566 unset challenge_token
570 # Create certificate for domain(s)
574 timestamp="$(date +%s)"
576 echo " + Signing domains..."
577 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
578 _exiterr "Certificate authority doesn't allow certificate signing"
581 # If there is no existing certificate directory => make it
582 if [[ ! -e "${CERTDIR}/${domain}" ]]; then
583 echo " + Creating new directory ${CERTDIR}/${domain} ..."
584 mkdir -p "${CERTDIR}/${domain}" || _exiterr "Unable to create directory ${CERTDIR}/${domain}"
587 privkey="privkey.pem"
588 # generate a new private key if we need or want one
589 if [[ ! -r "${CERTDIR}/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
590 echo " + Generating private key..."
591 privkey="privkey-${timestamp}.pem"
592 case "${KEY_ALGO}" in
593 rsa) _openssl genrsa -out "${CERTDIR}/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}";;
594 prime256v1|secp384r1) _openssl ecparam -genkey -name "${KEY_ALGO}" -out "${CERTDIR}/${domain}/privkey-${timestamp}.pem";;
598 # Generate signing request config and the actual signing request
599 echo " + Generating signing request..."
601 for altname in ${altnames}; do
602 SAN+="DNS:${altname}, "
605 local tmp_openssl_cnf
606 tmp_openssl_cnf="$(_mktemp)"
607 cat "${OPENSSL_CNF}" > "${tmp_openssl_cnf}"
608 printf "[SAN]\nsubjectAltName=%s" "${SAN}" >> "${tmp_openssl_cnf}"
609 if [ "${OCSP_MUST_STAPLE}" = "yes" ]; then
610 printf "\n1.3.6.1.5.5.7.1.24=DER:30:03:02:01:05" >> "${tmp_openssl_cnf}"
612 openssl req -new -sha256 -key "${CERTDIR}/${domain}/${privkey}" -out "${CERTDIR}/${domain}/cert-${timestamp}.csr" -subj "/CN=${domain}/" -reqexts SAN -config "${tmp_openssl_cnf}"
613 rm -f "${tmp_openssl_cnf}"
615 crt_path="${CERTDIR}/${domain}/cert-${timestamp}.pem"
616 # shellcheck disable=SC2086
617 sign_csr "$(< "${CERTDIR}/${domain}/cert-${timestamp}.csr" )" ${altnames} 3>"${crt_path}"
619 # Create fullchain.pem
620 echo " + Creating fullchain.pem..."
621 cat "${crt_path}" > "${CERTDIR}/${domain}/fullchain-${timestamp}.pem"
622 http_request get "$(openssl x509 -in "${CERTDIR}/${domain}/cert-${timestamp}.pem" -noout -text | grep 'CA Issuers - URI:' | cut -d':' -f2-)" > "${CERTDIR}/${domain}/chain-${timestamp}.pem"
623 if ! grep -q "BEGIN CERTIFICATE" "${CERTDIR}/${domain}/chain-${timestamp}.pem"; then
624 openssl x509 -in "${CERTDIR}/${domain}/chain-${timestamp}.pem" -inform DER -out "${CERTDIR}/${domain}/chain-${timestamp}.pem" -outform PEM
626 cat "${CERTDIR}/${domain}/chain-${timestamp}.pem" >> "${CERTDIR}/${domain}/fullchain-${timestamp}.pem"
629 [[ "${privkey}" = "privkey.pem" ]] || ln -sf "privkey-${timestamp}.pem" "${CERTDIR}/${domain}/privkey.pem"
631 ln -sf "chain-${timestamp}.pem" "${CERTDIR}/${domain}/chain.pem"
632 ln -sf "fullchain-${timestamp}.pem" "${CERTDIR}/${domain}/fullchain.pem"
633 ln -sf "cert-${timestamp}.csr" "${CERTDIR}/${domain}/cert.csr"
634 ln -sf "cert-${timestamp}.pem" "${CERTDIR}/${domain}/cert.pem"
636 # Wait for hook script to clean the challenge and to deploy cert if used
638 [[ -n "${HOOK}" ]] && "${HOOK}" "deploy_cert" "${domain}" "${CERTDIR}/${domain}/privkey.pem" "${CERTDIR}/${domain}/cert.pem" "${CERTDIR}/${domain}/fullchain.pem" "${CERTDIR}/${domain}/chain.pem" "${timestamp}"
640 unset challenge_token
645 # Description: Sign/renew non-existant/changed/expiring certificates.
646 command_sign_domains() {
649 if [[ -n "${PARAM_DOMAIN:-}" ]]; then
650 DOMAINS_TXT="$(_mktemp)"
651 printf -- "${PARAM_DOMAIN}" > "${DOMAINS_TXT}"
652 elif [[ -e "${DOMAINS_TXT}" ]]; then
653 if [[ ! -r "${DOMAINS_TXT}" ]]; then
654 _exiterr "domains.txt found but not readable"
657 _exiterr "domains.txt not found and --domain not given"
660 # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire
663 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
666 domain="$(printf '%s\n' "${line}" | cut -d' ' -f1)"
667 morenames="$(printf '%s\n' "${line}" | cut -s -d' ' -f2-)"
668 cert="${CERTDIR}/${domain}/cert.pem"
670 force_renew="${PARAM_FORCE:-no}"
672 if [[ -z "${morenames}" ]];then
673 echo "Processing ${domain}"
675 echo "Processing ${domain} with alternative names: ${morenames}"
679 # for now this loads the certificate specific config in a subshell and parses a diff of set variables.
680 # we could just source the config file but i decided to go this way to protect people from accidentally overriding
681 # variables used internally by this script itself.
682 if [[ -n "${DOMAINS_D}" ]]; then
683 certconfig="${DOMAINS_D}/${domain}"
685 certconfig="${CERTDIR}/${domain}/config"
688 if [ -f "${certconfig}" ]; then
689 echo " + Using certificate specific config file!"
693 beforevars="$(_mktemp)"
694 aftervars="$(_mktemp)"
695 set > "${beforevars}"
696 # shellcheck disable=SC1090
699 diff -u "${beforevars}" "${aftervars}" | grep -E '^\+[^+]'
703 config_var="$(echo "${cfgline:1}" | cut -d'=' -f1)"
704 config_value="$(echo "${cfgline:1}" | cut -d'=' -f2-)"
705 case "${config_var}" in
706 KEY_ALGO|OCSP_MUST_STAPLE|PRIVATE_KEY_RENEW|KEYSIZE|CHALLENGETYPE|HOOK|WELLKNOWN|HOOK_CHAIN|OPENSSL_CNF|RENEW_DAYS)
707 echo " + ${config_var} = ${config_value}"
708 declare -- "${config_var}=${config_value}"
711 *) echo " ! Setting ${config_var} on a per-certificate base is not (yet) supported"
718 if [[ -e "${cert}" ]]; then
719 printf " + Checking domain name(s) of existing cert..."
721 certnames="$(openssl x509 -in "${cert}" -text -noout | grep DNS: | _sed 's/DNS://g' | tr -d ' ' | tr ',' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//')"
722 givennames="$(echo "${domain}" "${morenames}"| tr ' ' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//' | _sed 's/^ //')"
724 if [[ "${certnames}" = "${givennames}" ]]; then
728 echo " + Domain name(s) are not matching!"
729 echo " + Names in old certificate: ${certnames}"
730 echo " + Configured names: ${givennames}"
731 echo " + Forcing renew."
736 if [[ -e "${cert}" ]]; then
737 echo " + Checking expire date of existing cert..."
738 valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )"
740 printf " + Valid till %s " "${valid}"
741 if openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; then
742 printf "(Longer than %d days). " "${RENEW_DAYS}"
743 if [[ "${force_renew}" = "yes" ]]; then
744 echo "Ignoring because renew was forced!"
746 # Certificate-Names unchanged and cert is still valid
747 echo "Skipping renew!"
748 [[ -n "${HOOK}" ]] && "${HOOK}" "unchanged_cert" "${domain}" "${CERTDIR}/${domain}/privkey.pem" "${CERTDIR}/${domain}/cert.pem" "${CERTDIR}/${domain}/fullchain.pem" "${CERTDIR}/${domain}/chain.pem"
752 echo "(Less than ${RENEW_DAYS} days). Renewing!"
756 # shellcheck disable=SC2086
757 if [[ "${PARAM_KEEP_GOING:-}" = "yes" ]]; then
758 sign_domain ${line} &
765 # remove temporary domains.txt file if used
766 [[ -n "${PARAM_DOMAIN:-}" ]] && rm -f "${DOMAINS_TXT}"
771 # Usage: --signcsr (-s) path/to/csr.pem
772 # Description: Sign a given CSR, output CRT on stdout (advanced usage)
774 # redirect stdout to stderr
775 # leave stdout over at fd 3 to output the cert
781 if [ ! -r "${csrfile}" ]; then
782 _exiterr "Could not read certificate signing request ${csrfile}"
786 certfile="$(_mktemp)"
787 sign_csr "$(< "${csrfile}" )" 3> "${certfile}"
789 # get and convert ca cert
790 chainfile="$(_mktemp)"
791 http_request get "$(openssl x509 -in "${certfile}" -noout -text | grep 'CA Issuers - URI:' | cut -d':' -f2-)" > "${chainfile}"
793 if ! grep -q "BEGIN CERTIFICATE" "${chainfile}"; then
794 openssl x509 -inform DER -in "${chainfile}" -outform PEM -out "${chainfile}"
799 cat "${certfile}" >&3
802 cat "${chainfile}" >&3
811 # Usage: --revoke (-r) path/to/cert.pem
812 # Description: Revoke specified certificate
816 [[ -n "${CA_REVOKE_CERT}" ]] || _exiterr "Certificate authority doesn't allow certificate revocation."
819 if [[ -L "${cert}" ]]; then
820 # follow symlink and use real certificate name (so we move the real file and not the symlink at the end)
822 link_target="$(readlink -n "${cert}")"
823 if [[ "${link_target}" =~ ^/ ]]; then
824 cert="${link_target}"
826 cert="$(dirname "${cert}")/${link_target}"
829 [[ -f "${cert}" ]] || _exiterr "Could not find certificate ${cert}"
831 echo "Revoking ${cert}"
833 cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)"
834 response="$(signed_request "${CA_REVOKE_CERT}" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}' | clean_json)"
835 # if there is a problem with our revoke request _request (via signed_request) will report this and "exit 1" out
836 # so if we are here, it is safe to assume the request was successful
838 echo " + Renaming certificate to ${cert}-revoked"
839 mv -f "${cert}" "${cert}-revoked"
842 # Usage: --cleanup (-gc)
843 # Description: Move unused certificate files to archive directory
847 # Create global archive directory if not existant
848 if [[ ! -e "${BASEDIR}/archive" ]]; then
849 mkdir "${BASEDIR}/archive"
852 # Loop over all certificate directories
853 for certdir in "${CERTDIR}/"*; do
854 # Skip if entry is not a folder
855 [[ -d "${certdir}" ]] || continue
857 # Get certificate name
858 certname="$(basename "${certdir}")"
860 # Create certitifaces archive directory if not existant
861 archivedir="${BASEDIR}/archive/${certname}"
862 if [[ ! -e "${archivedir}" ]]; then
863 mkdir "${archivedir}"
866 # Loop over file-types (certificates, keys, signing-requests, ...)
867 for filetype in cert.csr cert.pem chain.pem fullchain.pem privkey.pem; do
868 # Skip if symlink is broken
869 [[ -r "${certdir}/${filetype}" ]] || continue
871 # Look up current file in use
872 current="$(basename "$(readlink "${certdir}/${filetype}")")"
874 # Split filetype into name and extension
875 filebase="$(echo "${filetype}" | cut -d. -f1)"
876 fileext="$(echo "${filetype}" | cut -d. -f2)"
878 # Loop over all files of this type
879 for file in "${certdir}/${filebase}-"*".${fileext}"; do
880 # Handle case where no files match the wildcard
881 [[ -f "${file}" ]] || break
883 # Check if current file is in use, if unused move to archive directory
884 filename="$(basename "${file}")"
885 if [[ ! "${filename}" = "${current}" ]]; then
886 echo "Moving unused file to archive directory: ${certname}/${filename}"
887 mv "${certdir}/${filename}" "${archivedir}/${filename}"
897 # Description: Show help text
899 printf "Usage: %s [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...\n\n" "${0}"
900 printf "Default command: help\n\n"
902 grep -e '^[[:space:]]*# Usage:' -e '^[[:space:]]*# Description:' -e '^command_.*()[[:space:]]*{' "${0}" | while read -r usage; read -r description; read -r command; do
903 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]] || [[ ! "${command}" =~ ^command_ ]]; then
904 _exiterr "Error generating help text."
906 printf " %-32s %s\n" "${usage##"# Usage: "}" "${description##"# Description: "}"
908 printf -- "\nParameters:\n"
909 grep -E -e '^[[:space:]]*# PARAM_Usage:' -e '^[[:space:]]*# PARAM_Description:' "${0}" | while read -r usage; read -r description; do
910 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]]; then
911 _exiterr "Error generating help text."
913 printf " %-32s %s\n" "${usage##"# PARAM_Usage: "}" "${description##"# PARAM_Description: "}"
918 # Description: Output configuration variables for use in other scripts
920 echo "# letsencrypt.sh configuration"
922 typeset -p CA LICENSE CERTDIR CHALLENGETYPE DOMAINS_D DOMAINS_TXT HOOK HOOK_CHAIN RENEW_DAYS ACCOUNT_KEY ACCOUNT_KEY_JSON KEYSIZE WELLKNOWN PRIVATE_KEY_RENEW OPENSSL_CNF CONTACT_EMAIL LOCKFILE
925 # Main method (parses script arguments and calls command_* methods)
929 [[ -z "${COMMAND}" ]] || _exiterr "Only one command can be executed at a time. See help (-h) for more information."
934 if [[ -z "${1:-}" ]]; then
935 echo "The specified command requires additional parameters. See help:" >&2
939 elif [[ "${1:0:1}" = "-" ]]; then
940 _exiterr "Invalid argument: ${1}"
944 [[ -z "${@}" ]] && eval set -- "--help"
958 set_command sign_domains
964 check_parameters "${1:-}"
971 check_parameters "${1:-}"
972 PARAM_REVOKECERT="${1}"
979 # PARAM_Usage: --ipv4 (-4)
980 # PARAM_Description: Resolve names to IPv4 addresses only
985 # PARAM_Usage: --ipv6 (-6)
986 # PARAM_Description: Resolve names to IPv6 addresses only
991 # PARAM_Usage: --domain (-d) domain.tld
992 # PARAM_Description: Use specified domain name(s) instead of domains.txt entry (one certificate!)
995 check_parameters "${1:-}"
996 if [[ -z "${PARAM_DOMAIN:-}" ]]; then
999 PARAM_DOMAIN="${PARAM_DOMAIN} ${1}"
1003 # PARAM_Usage: --keep-going (-g)
1004 # PARAM_Description: Keep going after encountering an error while creating/renewing multiple certificates in cron mode
1006 PARAM_KEEP_GOING="yes"
1009 # PARAM_Usage: --force (-x)
1010 # PARAM_Description: Force renew of certificate even if it is longer valid than value in RENEW_DAYS
1015 # PARAM_Usage: --no-lock (-n)
1016 # PARAM_Description: Don't use lockfile (potentially dangerous!)
1021 # PARAM_Usage: --ocsp
1022 # PARAM_Description: Sets option in CSR indicating OCSP stapling to be mandatory
1024 PARAM_OCSP_MUST_STAPLE="yes"
1027 # PARAM_Usage: --privkey (-p) path/to/key.pem
1028 # PARAM_Description: Use specified private key instead of account key (useful for revocation)
1031 check_parameters "${1:-}"
1032 PARAM_ACCOUNT_KEY="${1}"
1035 # PARAM_Usage: --config (-f) path/to/config
1036 # PARAM_Description: Use specified config file
1039 check_parameters "${1:-}"
1043 # PARAM_Usage: --hook (-k) path/to/hook.sh
1044 # PARAM_Description: Use specified script for hooks
1047 check_parameters "${1:-}"
1051 # PARAM_Usage: --out (-o) certs/directory
1052 # PARAM_Description: Output certificates into the specified directory
1055 check_parameters "${1:-}"
1056 PARAM_CERTDIR="${1}"
1059 # PARAM_Usage: --challenge (-t) http-01|dns-01
1060 # PARAM_Description: Which challenge should be used? Currently http-01 and dns-01 are supported
1063 check_parameters "${1:-}"
1064 PARAM_CHALLENGETYPE="${1}"
1067 # PARAM_Usage: --algo (-a) rsa|prime256v1|secp384r1
1068 # PARAM_Description: Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
1071 check_parameters "${1:-}"
1072 PARAM_KEY_ALGO="${1}"
1076 echo "Unknown parameter detected: ${1}" >&2
1086 case "${COMMAND}" in
1088 sign_domains) command_sign_domains;;
1089 sign_csr) command_sign_csr "${PARAM_CSR}";;
1090 revoke) command_revoke "${PARAM_REVOKECERT}";;
1091 cleanup) command_cleanup;;
1092 *) command_help; exit 1;;
1099 # Check for missing dependencies