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="${check_config}/config"
107 CA="https://acme-v01.api.letsencrypt.org/directory"
108 LICENSE="https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf"
111 CHALLENGETYPE="http-01"
120 PRIVATE_KEY_RENEW="yes"
122 OPENSSL_CNF="$(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="${BASEDIR}/.acme-challenges"
185 [[ -z "${LOCKFILE}" ]] && LOCKFILE="${BASEDIR}/lock"
187 [[ -n "${PARAM_HOOK:-}" ]] && HOOK="${PARAM_HOOK}"
188 [[ -n "${PARAM_CERTDIR:-}" ]] && CERTDIR="${PARAM_CERTDIR}"
189 [[ -n "${PARAM_CHALLENGETYPE:-}" ]] && CHALLENGETYPE="${PARAM_CHALLENGETYPE}"
190 [[ -n "${PARAM_KEY_ALGO:-}" ]] && KEY_ALGO="${PARAM_KEY_ALGO}"
191 [[ -n "${PARAM_OCSP_MUST_STAPLE:-}" ]] && OCSP_MUST_STAPLE="${PARAM_OCSP_MUST_STAPLE}"
192 [[ -n "${PARAM_IP_VERSION:-}" ]] && IP_VERSION="${PARAM_IP_VERSION}"
202 # Lockfile handling (prevents concurrent access)
203 LOCKDIR="$(dirname "${LOCKFILE}")"
204 [[ -w "${LOCKDIR}" ]] || _exiterr "Directory ${LOCKDIR} for LOCKFILE ${LOCKFILE} is not writable, aborting."
205 ( set -C; date > "${LOCKFILE}" ) 2>/dev/null || _exiterr "Lock file '${LOCKFILE}' present, aborting."
206 remove_lock() { rm -f "${LOCKFILE}"; }
207 trap 'remove_lock' EXIT
210 CA_DIRECTORY="$(http_request get "${CA}")"
211 CA_NEW_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-cert)" &&
212 CA_NEW_AUTHZ="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-authz)" &&
213 CA_NEW_REG="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-reg)" &&
214 # shellcheck disable=SC2015
215 CA_REVOKE_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value revoke-cert)" ||
216 _exiterr "Problem retrieving ACME/CA-URLs, check if your configured CA points to the directory entrypoint."
218 # Export some environment variables to be used in hook script
219 export WELLKNOWN BASEDIR CERTDIR CONFIG
221 # Checking for private key ...
222 register_new_key="no"
223 if [[ -n "${PARAM_ACCOUNT_KEY:-}" ]]; then
224 # a private key was specified from the command line so use it for this run
225 echo "Using private key ${PARAM_ACCOUNT_KEY} instead of account key"
226 ACCOUNT_KEY="${PARAM_ACCOUNT_KEY}"
227 ACCOUNT_KEY_JSON="${PARAM_ACCOUNT_KEY}.json"
229 # Check if private account key exists, if it doesn't exist yet generate a new one (rsa key)
230 if [[ ! -e "${ACCOUNT_KEY}" ]]; then
231 echo "+ Generating account key..."
232 _openssl genrsa -out "${ACCOUNT_KEY}" "${KEYSIZE}"
233 register_new_key="yes"
236 openssl rsa -in "${ACCOUNT_KEY}" -check 2>/dev/null > /dev/null || _exiterr "Account key is not valid, can not continue."
238 # Get public components from private key and calculate thumbprint
239 pubExponent64="$(printf '%x' "$(openssl rsa -in "${ACCOUNT_KEY}" -noout -text | awk '/publicExponent/ {print $2}')" | hex2bin | urlbase64)"
240 pubMod64="$(openssl rsa -in "${ACCOUNT_KEY}" -noout -modulus | cut -d'=' -f2 | hex2bin | urlbase64)"
242 thumbprint="$(printf '{"e":"%s","kty":"RSA","n":"%s"}' "${pubExponent64}" "${pubMod64}" | openssl dgst -sha256 -binary | urlbase64)"
244 # If we generated a new private key in the step above we have to register it with the acme-server
245 if [[ "${register_new_key}" = "yes" ]]; then
246 echo "+ Registering account key with letsencrypt..."
247 [[ ! -z "${CA_NEW_REG}" ]] || _exiterr "Certificate authority doesn't allow registrations."
248 # If an email for the contact has been provided then adding it to the registration request
250 if [[ -n "${CONTACT_EMAIL}" ]]; then
251 (signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > "${ACCOUNT_KEY_JSON}") || FAILED=true
253 (signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > "${ACCOUNT_KEY_JSON}") || FAILED=true
255 if [[ "${FAILED}" = "true" ]]; then
258 echo "Error registering account key. See message above for more information."
259 rm "${ACCOUNT_KEY}" "${ACCOUNT_KEY_JSON}"
266 # Different sed version for different os types...
268 if [[ "${OSTYPE}" = "Linux" ]]; then
275 # Print error message and exit with error
277 echo "ERROR: ${1}" >&2
281 # Remove newlines and whitespace from json
283 tr -d '\r\n' | _sed -e 's/ +/ /g' -e 's/\{ /{/g' -e 's/ \}/}/g' -e 's/\[ /[/g' -e 's/ \]/]/g'
286 # Encode data as url-safe formatted base64
288 # urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_'
289 openssl base64 -e | tr -d '\n\r' | _sed -e 's:=*$::g' -e 'y:+/:-_:'
292 # Convert hex string to binary data
294 # Remove spaces, add leading zero, escape as hex string and parse with printf
295 printf -- "$(cat | _sed -e 's/[[:space:]]//g' -e 's/^(.(.{2})*)$/0\1/' -e 's/(.{2})/\\x\1/g')"
298 # Get string value from json dictionary
299 get_json_string_value() {
301 filter=$(printf 's/.*"%s": *"\([^"]*\)".*/\\1/p' "$1")
305 # OpenSSL writes to stderr/stdout even when there are no errors. So just
306 # display the output if the exit code was != 0 to simplify debugging.
309 out="$(openssl "${@}" 2>&1)"
312 if [[ ${res} -ne 0 ]]; then
313 echo " + ERROR: failed to run $* (Exitcode: ${res})" >&2
322 # Send http(s) request with specified method
324 tempcont="$(_mktemp)"
326 if [[ -n "${IP_VERSION:-}" ]]; then
327 ip_version="-${IP_VERSION}"
331 if [[ "${1}" = "head" ]]; then
332 statuscode="$(curl ${ip_version:-} -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)"
334 elif [[ "${1}" = "get" ]]; then
335 statuscode="$(curl ${ip_version:-} -s -w "%{http_code}" -o "${tempcont}" "${2}")"
337 elif [[ "${1}" = "post" ]]; then
338 statuscode="$(curl ${ip_version:-} -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")"
342 _exiterr "Unknown request method: ${1}"
346 if [[ ! "${curlret}" = "0" ]]; then
347 _exiterr "Problem connecting to server (${1} for ${2}; curl returned with ${curlret})"
350 if [[ ! "${statuscode:0:1}" = "2" ]]; then
351 echo " + ERROR: An error occurred while sending ${1}-request to ${2} (Status ${statuscode})" >&2
354 cat "${tempcont}" >&2
357 # Wait for hook script to clean the challenge if used
358 if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token:+set}" ]]; then
359 "${HOOK}" "clean_challenge" '' "${challenge_token}" "${keyauth}"
362 # remove temporary domains.txt file if used
363 [[ -n "${PARAM_DOMAIN:-}" && -n "${DOMAINS_TXT:-}" ]] && rm "${DOMAINS_TXT}"
371 # Send signed request
373 # Encode payload as urlbase64
374 payload64="$(printf '%s' "${2}" | urlbase64)"
376 # Retrieve nonce from acme-server
377 nonce="$(http_request head "${CA}" | grep Replay-Nonce: | awk -F ': ' '{print $2}' | tr -d '\n\r')"
379 # Build header with just our public key and algorithm information
380 header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}'
382 # Build another header which also contains the previously received nonce and encode it as urlbase64
383 protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}'
384 protected64="$(printf '%s' "${protected}" | urlbase64)"
386 # Sign header with nonce and our payload with our private key and encode signature as urlbase64
387 signed64="$(printf '%s' "${protected64}.${payload64}" | openssl dgst -sha256 -sign "${ACCOUNT_KEY}" | urlbase64)"
389 # Send header + extended header + payload + signature to the acme-server
390 data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
392 http_request post "${1}" "${data}"
395 # Extracts all subject names from a CSR
396 # Outputs either the CN, or the SANs, one per line
398 csr="${1}" # the CSR itself (not a file)
400 if ! <<<"${csr}" openssl req -verify -noout 2>/dev/null; then
401 _exiterr "Certificate signing request isn't valid"
404 reqtext="$( <<<"${csr}" openssl req -noout -text )"
405 if <<<"${reqtext}" grep -q '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$'; then
406 # SANs used, extract these
407 altnames="$( <<<"${reqtext}" grep -A1 '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$' | tail -n1 )"
408 # split to one per line:
409 # shellcheck disable=SC1003
410 altnames="$( <<<"${altnames}" _sed -e 's/^[[:space:]]*//; s/, /\'$'\n''/g' )"
411 # we can only get DNS: ones signed
412 if grep -qv '^DNS:' <<<"${altnames}"; then
413 _exiterr "Certificate signing request contains non-DNS Subject Alternative Names"
415 # strip away the DNS: prefix
416 altnames="$( <<<"${altnames}" _sed -e 's/^DNS://' )"
420 # No SANs, extract CN
421 altnames="$( <<<"${reqtext}" grep '^[[:space:]]*Subject:' | _sed -e 's/.* CN=([^ /,]*).*/\1/' )"
426 # Create certificate for domain(s) and outputs it FD 3
428 csr="${1}" # the CSR itself (not a file)
430 if { true >&3; } 2>/dev/null; then
433 _exiterr "sign_csr: FD 3 not open"
438 if [ -z "${altnames}" ]; then
439 altnames="$( extract_altnames "${csr}" )"
442 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
443 _exiterr "Certificate authority doesn't allow certificate signing"
447 if [[ -n "${ZSH_VERSION:-}" ]]; then
448 local -A challenge_uris challenge_tokens keyauths deploy_args
450 local -a challenge_uris challenge_tokens keyauths deploy_args
454 for altname in ${altnames}; do
455 # Ask the acme-server for new challenge token and extract them from the resulting json block
456 echo " + Requesting challenge for ${altname}..."
457 response="$(signed_request "${CA_NEW_AUTHZ}" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}' | clean_json)"
459 challenges="$(printf '%s\n' "${response}" | sed -n 's/.*\("challenges":[^\[]*\[[^]]*]\).*/\1/p')"
460 repl=$'\n''{' # fix syntax highlighting in Vim
461 challenge="$(printf "%s" "${challenges//\{/${repl}}" | grep \""${CHALLENGETYPE}"\")"
462 challenge_token="$(printf '%s' "${challenge}" | get_json_string_value token | _sed 's/[^A-Za-z0-9_\-]/_/g')"
463 challenge_uri="$(printf '%s' "${challenge}" | get_json_string_value uri)"
465 if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then
466 _exiterr "Can't retrieve challenges (${response})"
469 # Challenge response consists of the challenge token and the thumbprint of our public certificate
470 keyauth="${challenge_token}.${thumbprint}"
472 case "${CHALLENGETYPE}" in
474 # Store challenge response in well-known location and make world-readable (so that a webserver can access it)
475 printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}"
476 chmod a+r "${WELLKNOWN}/${challenge_token}"
477 keyauth_hook="${keyauth}"
480 # Generate DNS entry content for dns-01 validation
481 keyauth_hook="$(printf '%s' "${keyauth}" | openssl dgst -sha256 -binary | urlbase64)"
485 challenge_uris[${idx}]="${challenge_uri}"
486 keyauths[${idx}]="${keyauth}"
487 challenge_tokens[${idx}]="${challenge_token}"
488 # Note: assumes args will never have spaces!
489 deploy_args[${idx}]="${altname} ${challenge_token} ${keyauth_hook}"
493 # Wait for hook script to deploy the challenges if used
494 # shellcheck disable=SC2068
495 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[@]}
497 # Respond to challenges
499 for altname in ${altnames}; do
500 challenge_token="${challenge_tokens[${idx}]}"
501 keyauth="${keyauths[${idx}]}"
503 # Wait for hook script to deploy the challenge if used
504 # shellcheck disable=SC2086
505 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[${idx}]}
507 # Ask the acme-server to verify our challenge and wait until it is no longer pending
508 echo " + Responding to challenge for ${altname}..."
509 result="$(signed_request "${challenge_uris[${idx}]}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}' | clean_json)"
511 reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
513 while [[ "${reqstatus}" = "pending" ]]; do
515 result="$(http_request get "${challenge_uris[${idx}]}")"
516 reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
519 [[ "${CHALLENGETYPE}" = "http-01" ]] && rm -f "${WELLKNOWN}/${challenge_token}"
521 # Wait for hook script to clean the challenge if used
522 if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token}" ]]; then
523 # shellcheck disable=SC2086
524 "${HOOK}" "clean_challenge" ${deploy_args[${idx}]}
528 if [[ "${reqstatus}" = "valid" ]]; then
529 echo " + Challenge is valid!"
535 # Wait for hook script to clean the challenges if used
536 # shellcheck disable=SC2068
537 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "clean_challenge" ${deploy_args[@]}
539 if [[ "${reqstatus}" != "valid" ]]; then
540 # Clean up any remaining challenge_tokens if we stopped early
541 if [[ "${CHALLENGETYPE}" = "http-01" ]]; then
542 while [ ${idx} -lt ${#challenge_tokens[@]} ]; do
543 rm -f "${WELLKNOWN}/${challenge_tokens[${idx}]}"
548 _exiterr "Challenge is invalid! (returned: ${reqstatus}) (result: ${result})"
551 # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem
552 echo " + Requesting certificate..."
553 csr64="$( <<<"${csr}" openssl req -outform DER | urlbase64)"
554 crt64="$(signed_request "${CA_NEW_CERT}" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)"
555 crt="$( printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" )"
557 # Try to load the certificate to detect corruption
558 echo " + Checking certificate..."
559 _openssl x509 -text <<<"${crt}"
563 unset challenge_token
567 # Create certificate for domain(s)
571 timestamp="$(date +%s)"
573 echo " + Signing domains..."
574 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
575 _exiterr "Certificate authority doesn't allow certificate signing"
578 # If there is no existing certificate directory => make it
579 if [[ ! -e "${CERTDIR}/${domain}" ]]; then
580 echo " + Creating new directory ${CERTDIR}/${domain} ..."
581 mkdir -p "${CERTDIR}/${domain}" || _exiterr "Unable to create directory ${CERTDIR}/${domain}"
584 privkey="privkey.pem"
585 # generate a new private key if we need or want one
586 if [[ ! -r "${CERTDIR}/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
587 echo " + Generating private key..."
588 privkey="privkey-${timestamp}.pem"
589 case "${KEY_ALGO}" in
590 rsa) _openssl genrsa -out "${CERTDIR}/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}";;
591 prime256v1|secp384r1) _openssl ecparam -genkey -name "${KEY_ALGO}" -out "${CERTDIR}/${domain}/privkey-${timestamp}.pem";;
595 # Generate signing request config and the actual signing request
596 echo " + Generating signing request..."
598 for altname in ${altnames}; do
599 SAN+="DNS:${altname}, "
602 local tmp_openssl_cnf
603 tmp_openssl_cnf="$(_mktemp)"
604 cat "${OPENSSL_CNF}" > "${tmp_openssl_cnf}"
605 printf "[SAN]\nsubjectAltName=%s" "${SAN}" >> "${tmp_openssl_cnf}"
606 if [ "${OCSP_MUST_STAPLE}" = "yes" ]; then
607 printf "\n1.3.6.1.5.5.7.1.24=DER:30:03:02:01:05" >> "${tmp_openssl_cnf}"
609 openssl req -new -sha256 -key "${CERTDIR}/${domain}/${privkey}" -out "${CERTDIR}/${domain}/cert-${timestamp}.csr" -subj "/CN=${domain}/" -reqexts SAN -config "${tmp_openssl_cnf}"
610 rm -f "${tmp_openssl_cnf}"
612 crt_path="${CERTDIR}/${domain}/cert-${timestamp}.pem"
613 # shellcheck disable=SC2086
614 sign_csr "$(< "${CERTDIR}/${domain}/cert-${timestamp}.csr" )" ${altnames} 3>"${crt_path}"
616 # Create fullchain.pem
617 echo " + Creating fullchain.pem..."
618 cat "${crt_path}" > "${CERTDIR}/${domain}/fullchain-${timestamp}.pem"
619 http_request get "$(openssl x509 -in "${CERTDIR}/${domain}/cert-${timestamp}.pem" -noout -text | grep 'CA Issuers - URI:' | cut -d':' -f2-)" > "${CERTDIR}/${domain}/chain-${timestamp}.pem"
620 if ! grep -q "BEGIN CERTIFICATE" "${CERTDIR}/${domain}/chain-${timestamp}.pem"; then
621 openssl x509 -in "${CERTDIR}/${domain}/chain-${timestamp}.pem" -inform DER -out "${CERTDIR}/${domain}/chain-${timestamp}.pem" -outform PEM
623 cat "${CERTDIR}/${domain}/chain-${timestamp}.pem" >> "${CERTDIR}/${domain}/fullchain-${timestamp}.pem"
626 [[ "${privkey}" = "privkey.pem" ]] || ln -sf "privkey-${timestamp}.pem" "${CERTDIR}/${domain}/privkey.pem"
628 ln -sf "chain-${timestamp}.pem" "${CERTDIR}/${domain}/chain.pem"
629 ln -sf "fullchain-${timestamp}.pem" "${CERTDIR}/${domain}/fullchain.pem"
630 ln -sf "cert-${timestamp}.csr" "${CERTDIR}/${domain}/cert.csr"
631 ln -sf "cert-${timestamp}.pem" "${CERTDIR}/${domain}/cert.pem"
633 # Wait for hook script to clean the challenge and to deploy cert if used
635 [[ -n "${HOOK}" ]] && "${HOOK}" "deploy_cert" "${domain}" "${CERTDIR}/${domain}/privkey.pem" "${CERTDIR}/${domain}/cert.pem" "${CERTDIR}/${domain}/fullchain.pem" "${CERTDIR}/${domain}/chain.pem" "${timestamp}"
637 unset challenge_token
642 # Description: Sign/renew non-existant/changed/expiring certificates.
643 command_sign_domains() {
646 if [[ -n "${PARAM_DOMAIN:-}" ]]; then
647 DOMAINS_TXT="$(_mktemp)"
648 printf -- "${PARAM_DOMAIN}" > "${DOMAINS_TXT}"
649 elif [[ -e "${DOMAINS_TXT}" ]]; then
650 if [[ ! -r "${DOMAINS_TXT}" ]]; then
651 _exiterr "domains.txt found but not readable"
654 _exiterr "domains.txt not found and --domain not given"
657 # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire
660 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
663 domain="$(printf '%s\n' "${line}" | cut -d' ' -f1)"
664 morenames="$(printf '%s\n' "${line}" | cut -s -d' ' -f2-)"
665 cert="${CERTDIR}/${domain}/cert.pem"
667 force_renew="${PARAM_FORCE:-no}"
669 if [[ -z "${morenames}" ]];then
670 echo "Processing ${domain}"
672 echo "Processing ${domain} with alternative names: ${morenames}"
676 # for now this loads the certificate specific config in a subshell and parses a diff of set variables.
677 # we could just source the config file but i decided to go this way to protect people from accidentally overriding
678 # variables used internally by this script itself.
679 if [[ -n "${DOMAINS_D}" ]]; then
680 certconfig="${DOMAINS_D}/${domain}"
682 certconfig="${CERTDIR}/${domain}/config"
685 if [ -f "${certconfig}" ]; then
686 echo " + Using certificate specific config file!"
690 beforevars="$(_mktemp)"
691 aftervars="$(_mktemp)"
692 set > "${beforevars}"
693 # shellcheck disable=SC1090
696 diff -u "${beforevars}" "${aftervars}" | grep -E '^\+[^+]'
700 config_var="$(echo "${cfgline:1}" | cut -d'=' -f1)"
701 config_value="$(echo "${cfgline:1}" | cut -d'=' -f2-)"
702 case "${config_var}" in
703 KEY_ALGO|OCSP_MUST_STAPLE|PRIVATE_KEY_RENEW|KEYSIZE|CHALLENGETYPE|HOOK|WELLKNOWN|HOOK_CHAIN|OPENSSL_CNF|RENEW_DAYS)
704 echo " + ${config_var} = ${config_value}"
705 declare -- "${config_var}=${config_value}"
708 *) echo " ! Setting ${config_var} on a per-certificate base is not (yet) supported"
715 if [[ -e "${cert}" ]]; then
716 printf " + Checking domain name(s) of existing cert..."
718 certnames="$(openssl x509 -in "${cert}" -text -noout | grep DNS: | _sed 's/DNS://g' | tr -d ' ' | tr ',' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//')"
719 givennames="$(echo "${domain}" "${morenames}"| tr ' ' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//' | _sed 's/^ //')"
721 if [[ "${certnames}" = "${givennames}" ]]; then
725 echo " + Domain name(s) are not matching!"
726 echo " + Names in old certificate: ${certnames}"
727 echo " + Configured names: ${givennames}"
728 echo " + Forcing renew."
733 if [[ -e "${cert}" ]]; then
734 echo " + Checking expire date of existing cert..."
735 valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )"
737 printf " + Valid till %s " "${valid}"
738 if openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; then
739 printf "(Longer than %d days). " "${RENEW_DAYS}"
740 if [[ "${force_renew}" = "yes" ]]; then
741 echo "Ignoring because renew was forced!"
743 # Certificate-Names unchanged and cert is still valid
744 echo "Skipping renew!"
745 [[ -n "${HOOK}" ]] && "${HOOK}" "unchanged_cert" "${domain}" "${CERTDIR}/${domain}/privkey.pem" "${CERTDIR}/${domain}/cert.pem" "${CERTDIR}/${domain}/fullchain.pem" "${CERTDIR}/${domain}/chain.pem"
749 echo "(Less than ${RENEW_DAYS} days). Renewing!"
753 # shellcheck disable=SC2086
757 # remove temporary domains.txt file if used
758 [[ -n "${PARAM_DOMAIN:-}" ]] && rm -f "${DOMAINS_TXT}"
763 # Usage: --signcsr (-s) path/to/csr.pem
764 # Description: Sign a given CSR, output CRT on stdout (advanced usage)
766 # redirect stdout to stderr
767 # leave stdout over at fd 3 to output the cert
773 if [ ! -r "${csrfile}" ]; then
774 _exiterr "Could not read certificate signing request ${csrfile}"
778 certfile="$(_mktemp)"
779 sign_csr "$(< "${csrfile}" )" 3> "${certfile}"
781 # get and convert ca cert
782 chainfile="$(_mktemp)"
783 http_request get "$(openssl x509 -in "${certfile}" -noout -text | grep 'CA Issuers - URI:' | cut -d':' -f2-)" > "${chainfile}"
785 if ! grep -q "BEGIN CERTIFICATE" "${chainfile}"; then
786 openssl x509 -inform DER -in "${chainfile}" -outform PEM -out "${chainfile}"
791 cat "${certfile}" >&3
794 cat "${chainfile}" >&3
803 # Usage: --revoke (-r) path/to/cert.pem
804 # Description: Revoke specified certificate
808 [[ -n "${CA_REVOKE_CERT}" ]] || _exiterr "Certificate authority doesn't allow certificate revocation."
811 if [[ -L "${cert}" ]]; then
812 # follow symlink and use real certificate name (so we move the real file and not the symlink at the end)
814 link_target="$(readlink -n "${cert}")"
815 if [[ "${link_target}" =~ ^/ ]]; then
816 cert="${link_target}"
818 cert="$(dirname "${cert}")/${link_target}"
821 [[ -f "${cert}" ]] || _exiterr "Could not find certificate ${cert}"
823 echo "Revoking ${cert}"
825 cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)"
826 response="$(signed_request "${CA_REVOKE_CERT}" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}' | clean_json)"
827 # if there is a problem with our revoke request _request (via signed_request) will report this and "exit 1" out
828 # so if we are here, it is safe to assume the request was successful
830 echo " + Renaming certificate to ${cert}-revoked"
831 mv -f "${cert}" "${cert}-revoked"
834 # Usage: --cleanup (-gc)
835 # Description: Move unused certificate files to archive directory
839 # Create global archive directory if not existant
840 if [[ ! -e "${BASEDIR}/archive" ]]; then
841 mkdir "${BASEDIR}/archive"
844 # Loop over all certificate directories
845 for certdir in "${CERTDIR}/"*; do
846 # Skip if entry is not a folder
847 [[ -d "${certdir}" ]] || continue
849 # Get certificate name
850 certname="$(basename "${certdir}")"
852 # Create certitifaces archive directory if not existant
853 archivedir="${BASEDIR}/archive/${certname}"
854 if [[ ! -e "${archivedir}" ]]; then
855 mkdir "${archivedir}"
858 # Loop over file-types (certificates, keys, signing-requests, ...)
859 for filetype in cert.csr cert.pem chain.pem fullchain.pem privkey.pem; do
860 # Skip if symlink is broken
861 [[ -r "${certdir}/${filetype}" ]] || continue
863 # Look up current file in use
864 current="$(basename "$(readlink "${certdir}/${filetype}")")"
866 # Split filetype into name and extension
867 filebase="$(echo "${filetype}" | cut -d. -f1)"
868 fileext="$(echo "${filetype}" | cut -d. -f2)"
870 # Loop over all files of this type
871 for file in "${certdir}/${filebase}-"*".${fileext}"; do
872 # Handle case where no files match the wildcard
873 [[ -f "${file}" ]] || break
875 # Check if current file is in use, if unused move to archive directory
876 filename="$(basename "${file}")"
877 if [[ ! "${filename}" = "${current}" ]]; then
878 echo "Moving unused file to archive directory: ${certname}/${filename}"
879 mv "${certdir}/${filename}" "${archivedir}/${filename}"
889 # Description: Show help text
891 printf "Usage: %s [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...\n\n" "${0}"
892 printf "Default command: help\n\n"
894 grep -e '^[[:space:]]*# Usage:' -e '^[[:space:]]*# Description:' -e '^command_.*()[[:space:]]*{' "${0}" | while read -r usage; read -r description; read -r command; do
895 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]] || [[ ! "${command}" =~ ^command_ ]]; then
896 _exiterr "Error generating help text."
898 printf " %-32s %s\n" "${usage##"# Usage: "}" "${description##"# Description: "}"
900 printf -- "\nParameters:\n"
901 grep -E -e '^[[:space:]]*# PARAM_Usage:' -e '^[[:space:]]*# PARAM_Description:' "${0}" | while read -r usage; read -r description; do
902 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]]; then
903 _exiterr "Error generating help text."
905 printf " %-32s %s\n" "${usage##"# PARAM_Usage: "}" "${description##"# PARAM_Description: "}"
910 # Description: Output configuration variables for use in other scripts
912 echo "# letsencrypt.sh configuration"
914 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
917 # Main method (parses script arguments and calls command_* methods)
921 [[ -z "${COMMAND}" ]] || _exiterr "Only one command can be executed at a time. See help (-h) for more information."
926 if [[ -z "${1:-}" ]]; then
927 echo "The specified command requires additional parameters. See help:" >&2
931 elif [[ "${1:0:1}" = "-" ]]; then
932 _exiterr "Invalid argument: ${1}"
936 [[ -z "${@}" ]] && eval set -- "--help"
950 set_command sign_domains
956 check_parameters "${1:-}"
963 check_parameters "${1:-}"
964 PARAM_REVOKECERT="${1}"
971 # PARAM_Usage: --ipv4 (-4)
972 # PARAM_Description: Resolve names to IPv4 addresses only
977 # PARAM_Usage: --ipv6 (-6)
978 # PARAM_Description: Resolve names to IPv6 addresses only
983 # PARAM_Usage: --domain (-d) domain.tld
984 # PARAM_Description: Use specified domain name(s) instead of domains.txt entry (one certificate!)
987 check_parameters "${1:-}"
988 if [[ -z "${PARAM_DOMAIN:-}" ]]; then
991 PARAM_DOMAIN="${PARAM_DOMAIN} ${1}"
996 # PARAM_Usage: --force (-x)
997 # PARAM_Description: Force renew of certificate even if it is longer valid than value in RENEW_DAYS
1002 # PARAM_Usage: --ocsp
1003 # PARAM_Description: Sets option in CSR indicating OCSP stapling to be mandatory
1005 PARAM_OCSP_MUST_STAPLE="yes"
1008 # PARAM_Usage: --privkey (-p) path/to/key.pem
1009 # PARAM_Description: Use specified private key instead of account key (useful for revocation)
1012 check_parameters "${1:-}"
1013 PARAM_ACCOUNT_KEY="${1}"
1016 # PARAM_Usage: --config (-f) path/to/config
1017 # PARAM_Description: Use specified config file
1020 check_parameters "${1:-}"
1024 # PARAM_Usage: --hook (-k) path/to/hook.sh
1025 # PARAM_Description: Use specified script for hooks
1028 check_parameters "${1:-}"
1032 # PARAM_Usage: --out (-o) certs/directory
1033 # PARAM_Description: Output certificates into the specified directory
1036 check_parameters "${1:-}"
1037 PARAM_CERTDIR="${1}"
1040 # PARAM_Usage: --challenge (-t) http-01|dns-01
1041 # PARAM_Description: Which challenge should be used? Currently http-01 and dns-01 are supported
1044 check_parameters "${1:-}"
1045 PARAM_CHALLENGETYPE="${1}"
1048 # PARAM_Usage: --algo (-a) rsa|prime256v1|secp384r1
1049 # PARAM_Description: Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
1052 check_parameters "${1:-}"
1053 PARAM_KEY_ALGO="${1}"
1057 echo "Unknown parameter detected: ${1}" >&2
1067 case "${COMMAND}" in
1069 sign_domains) command_sign_domains;;
1070 sign_csr) command_sign_csr "${PARAM_CSR}";;
1071 revoke) command_revoke "${PARAM_REVOKECERT}";;
1072 cleanup) command_cleanup;;
1073 *) command_help; exit 1;;
1080 # Check for missing dependencies