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.sh" ]]; then
55 BASEDIR="${check_config}"
56 CONFIG="${check_config}/config.sh"
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"
74 PRIVATE_KEY_RENEW="yes"
76 OPENSSL_CNF="$(openssl version -d | cut -d\" -f2)/openssl.cnf"
80 if [[ -z "${CONFIG:-}" ]]; then
82 echo "# !! WARNING !! No main config file found, using default config!" >&2
84 elif [[ -e "${CONFIG}" ]]; then
85 echo "# INFO: Using main config file ${CONFIG}"
86 BASEDIR="$(dirname "${CONFIG}")"
87 # shellcheck disable=SC1090
90 _exiterr "Specified config file doesn't exist."
93 if [[ -n "${CONFIG_D}" ]]; then
94 if [[ ! -d "${CONFIG_D}" ]]; then
95 _exiterr "The path ${CONFIG_D} specified for CONFIG_D does not point to a directory." >&2
98 for check_config_d in "${CONFIG_D}"/*.sh; do
99 if [[ ! -e "${check_config_d}" ]]; then
100 echo "# !! WARNING !! Extra configuration directory ${CONFIG_D} exists, but no configuration found in it." >&2
102 elif [[ -f "${check_config_d}" ]] && [[ -r "${check_config_d}" ]]; then
103 echo "# INFO: Using additional config file ${check_config_d}"
104 # shellcheck disable=SC1090
105 . "${check_config_d}"
107 _exiterr "Specified additional config ${check_config_d} is not readable or not a file at all." >&2
112 # Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality.
113 BASEDIR="${BASEDIR%%/}"
115 # Check BASEDIR and set default variables
116 [[ -d "${BASEDIR}" ]] || _exiterr "BASEDIR does not exist: ${BASEDIR}"
118 [[ -z "${ACCOUNT_KEY}" ]] && ACCOUNT_KEY="${BASEDIR}/private_key.pem"
119 [[ -z "${ACCOUNT_KEY_JSON}" ]] && ACCOUNT_KEY_JSON="${BASEDIR}/private_key.json"
120 [[ -z "${WELLKNOWN}" ]] && WELLKNOWN="${BASEDIR}/.acme-challenges"
121 [[ -z "${LOCKFILE}" ]] && LOCKFILE="${BASEDIR}/lock"
123 [[ -n "${PARAM_HOOK:-}" ]] && HOOK="${PARAM_HOOK}"
124 [[ -n "${PARAM_CHALLENGETYPE:-}" ]] && CHALLENGETYPE="${PARAM_CHALLENGETYPE}"
125 [[ -n "${PARAM_KEY_ALGO:-}" ]] && KEY_ALGO="${PARAM_KEY_ALGO}"
127 [[ "${CHALLENGETYPE}" =~ (http-01|dns-01) ]] || _exiterr "Unknown challenge type ${CHALLENGETYPE}... can not continue."
128 if [[ "${CHALLENGETYPE}" = "dns-01" ]] && [[ -z "${HOOK}" ]]; then
129 _exiterr "Challenge type dns-01 needs a hook script for deployment... can not continue."
131 [[ "${KEY_ALGO}" =~ ^(rsa|prime256v1|secp384r1)$ ]] || _exiterr "Unknown public key algorithm ${KEY_ALGO}... can not continue."
138 # Lockfile handling (prevents concurrent access)
139 LOCKDIR="$(dirname "${LOCKFILE}")"
140 [[ -w "${LOCKDIR}" ]] || _exiterr "Directory ${LOCKDIR} for LOCKFILE ${LOCKFILE} is not writable, aborting."
141 ( set -C; date > "${LOCKFILE}" ) 2>/dev/null || _exiterr "Lock file '${LOCKFILE}' present, aborting."
142 remove_lock() { rm -f "${LOCKFILE}"; }
143 trap 'remove_lock' EXIT
146 CA_DIRECTORY="$(http_request get "${CA}")"
147 CA_NEW_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-cert)" &&
148 CA_NEW_AUTHZ="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-authz)" &&
149 CA_NEW_REG="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-reg)" &&
150 # shellcheck disable=SC2015
151 CA_REVOKE_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value revoke-cert)" ||
152 _exiterr "Problem retrieving ACME/CA-URLs, check if your configured CA points to the directory entrypoint."
154 # Export some environment variables to be used in hook script
155 export WELLKNOWN BASEDIR CONFIG
157 # Checking for private key ...
158 register_new_key="no"
159 if [[ -n "${PARAM_ACCOUNT_KEY:-}" ]]; then
160 # a private key was specified from the command line so use it for this run
161 echo "Using private key ${PARAM_ACCOUNT_KEY} instead of account key"
162 ACCOUNT_KEY="${PARAM_ACCOUNT_KEY}"
163 ACCOUNT_KEY_JSON="${PARAM_ACCOUNT_KEY}.json"
165 # Check if private account key exists, if it doesn't exist yet generate a new one (rsa key)
166 if [[ ! -e "${ACCOUNT_KEY}" ]]; then
167 echo "+ Generating account key..."
168 _openssl genrsa -out "${ACCOUNT_KEY}" "${KEYSIZE}"
169 register_new_key="yes"
172 openssl rsa -in "${ACCOUNT_KEY}" -check 2>/dev/null > /dev/null || _exiterr "Account key is not valid, can not continue."
174 # Get public components from private key and calculate thumbprint
175 pubExponent64="$(printf '%x' "$(openssl rsa -in "${ACCOUNT_KEY}" -noout -text | awk '/publicExponent/ {print $2}')" | hex2bin | urlbase64)"
176 pubMod64="$(openssl rsa -in "${ACCOUNT_KEY}" -noout -modulus | cut -d'=' -f2 | hex2bin | urlbase64)"
178 thumbprint="$(printf '{"e":"%s","kty":"RSA","n":"%s"}' "${pubExponent64}" "${pubMod64}" | openssl dgst -sha256 -binary | urlbase64)"
180 # If we generated a new private key in the step above we have to register it with the acme-server
181 if [[ "${register_new_key}" = "yes" ]]; then
182 echo "+ Registering account key with letsencrypt..."
183 [[ ! -z "${CA_NEW_REG}" ]] || _exiterr "Certificate authority doesn't allow registrations."
184 # If an email for the contact has been provided then adding it to the registration request
185 if [[ -n "${CONTACT_EMAIL}" ]]; then
186 signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > "${ACCOUNT_KEY_JSON}"
188 signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > "${ACCOUNT_KEY_JSON}"
192 if [[ "${CHALLENGETYPE}" = "http-01" && ! -d "${WELLKNOWN}" ]]; then
193 _exiterr "WELLKNOWN directory doesn't exist, please create ${WELLKNOWN} and set appropriate permissions."
197 # Different sed version for different os types...
199 if [[ "${OSTYPE}" = "Linux" ]]; then
206 # Print error message and exit with error
208 echo "ERROR: ${1}" >&2
212 # Remove newlines and whitespace from json
214 tr -d '\r\n' | _sed -e 's/ +/ /g' -e 's/\{ /{/g' -e 's/ \}/}/g' -e 's/\[ /[/g' -e 's/ \]/]/g'
217 # Encode data as url-safe formatted base64
219 # urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_'
220 openssl base64 -e | tr -d '\n\r' | _sed -e 's:=*$::g' -e 'y:+/:-_:'
223 # Convert hex string to binary data
225 # Remove spaces, add leading zero, escape as hex string and parse with printf
226 printf -- "$(cat | _sed -e 's/[[:space:]]//g' -e 's/^(.(.{2})*)$/0\1/' -e 's/(.{2})/\\x\1/g')"
229 # Get string value from json dictionary
230 get_json_string_value() {
232 filter=$(printf 's/.*"%s": *"\([^"]*\)".*/\\1/p' "$1")
236 # OpenSSL writes to stderr/stdout even when there are no errors. So just
237 # display the output if the exit code was != 0 to simplify debugging.
240 out="$(openssl "${@}" 2>&1)"
243 if [[ ${res} -ne 0 ]]; then
244 echo " + ERROR: failed to run $* (Exitcode: ${res})" >&2
253 # Send http(s) request with specified method
255 tempcont="$(_mktemp)"
258 if [[ "${1}" = "head" ]]; then
259 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)"
261 elif [[ "${1}" = "get" ]]; then
262 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}")"
264 elif [[ "${1}" = "post" ]]; then
265 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")"
269 _exiterr "Unknown request method: ${1}"
273 if [[ ! "${curlret}" = "0" ]]; then
274 _exiterr "Problem connecting to server (curl returned with ${curlret})"
277 if [[ ! "${statuscode:0:1}" = "2" ]]; then
278 echo " + ERROR: An error occurred while sending ${1}-request to ${2} (Status ${statuscode})" >&2
281 cat "${tempcont}" >&2
284 # Wait for hook script to clean the challenge if used
285 if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token:+set}" ]]; then
286 "${HOOK}" "clean_challenge" '' "${challenge_token}" "${keyauth}"
289 # remove temporary domains.txt file if used
290 [[ -n "${PARAM_DOMAIN:-}" && -n "${DOMAINS_TXT:-}" ]] && rm "${DOMAINS_TXT}"
298 # Send signed request
300 # Encode payload as urlbase64
301 payload64="$(printf '%s' "${2}" | urlbase64)"
303 # Retrieve nonce from acme-server
304 nonce="$(http_request head "${CA}" | grep Replay-Nonce: | awk -F ': ' '{print $2}' | tr -d '\n\r')"
306 # Build header with just our public key and algorithm information
307 header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}'
309 # Build another header which also contains the previously received nonce and encode it as urlbase64
310 protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}'
311 protected64="$(printf '%s' "${protected}" | urlbase64)"
313 # Sign header with nonce and our payload with our private key and encode signature as urlbase64
314 signed64="$(printf '%s' "${protected64}.${payload64}" | openssl dgst -sha256 -sign "${ACCOUNT_KEY}" | urlbase64)"
316 # Send header + extended header + payload + signature to the acme-server
317 data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
319 http_request post "${1}" "${data}"
322 # Extracts all subject names from a CSR
323 # Outputs either the CN, or the SANs, one per line
325 csr="${1}" # the CSR itself (not a file)
327 if ! <<<"${csr}" openssl req -verify -noout 2>/dev/null; then
328 _exiterr "Certificate signing request isn't valid"
331 reqtext="$( <<<"${csr}" openssl req -noout -text )"
332 if <<<"${reqtext}" grep -q '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$'; then
333 # SANs used, extract these
334 altnames="$( <<<"${reqtext}" grep -A1 '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$' | tail -n1 )"
335 # split to one per line:
336 # shellcheck disable=SC1003
337 altnames="$( <<<"${altnames}" _sed -e 's/^[[:space:]]*//; s/, /\'$'\n''/g' )"
338 # we can only get DNS: ones signed
339 if grep -qv '^DNS:' <<<"${altnames}"; then
340 _exiterr "Certificate signing request contains non-DNS Subject Alternative Names"
342 # strip away the DNS: prefix
343 altnames="$( <<<"${altnames}" _sed -e 's/^DNS://' )"
347 # No SANs, extract CN
348 altnames="$( <<<"${reqtext}" grep '^[[:space:]]*Subject:' | _sed -e 's/.* CN=([^ /,]*).*/\1/' )"
353 # Create certificate for domain(s) and outputs it FD 3
355 csr="${1}" # the CSR itself (not a file)
357 if { true >&3; } 2>/dev/null; then
360 _exiterr "sign_csr: FD 3 not open"
365 if [ -z "${altnames}" ]; then
366 altnames="$( extract_altnames "${csr}" )"
369 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
370 _exiterr "Certificate authority doesn't allow certificate signing"
374 if [[ -n "${ZSH_VERSION:-}" ]]; then
375 local -A challenge_uris challenge_tokens keyauths deploy_args
377 local -a challenge_uris challenge_tokens keyauths deploy_args
381 for altname in ${altnames}; do
382 # Ask the acme-server for new challenge token and extract them from the resulting json block
383 echo " + Requesting challenge for ${altname}..."
384 response="$(signed_request "${CA_NEW_AUTHZ}" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}' | clean_json)"
386 challenges="$(printf '%s\n' "${response}" | sed -n 's/.*\("challenges":[^\[]*\[[^]]*]\).*/\1/p')"
387 repl=$'\n''{' # fix syntax highlighting in Vim
388 challenge="$(printf "%s" "${challenges//\{/${repl}}" | grep \""${CHALLENGETYPE}"\")"
389 challenge_token="$(printf '%s' "${challenge}" | get_json_string_value token | _sed 's/[^A-Za-z0-9_\-]/_/g')"
390 challenge_uri="$(printf '%s' "${challenge}" | get_json_string_value uri)"
392 if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then
393 _exiterr "Can't retrieve challenges (${response})"
396 # Challenge response consists of the challenge token and the thumbprint of our public certificate
397 keyauth="${challenge_token}.${thumbprint}"
399 case "${CHALLENGETYPE}" in
401 # Store challenge response in well-known location and make world-readable (so that a webserver can access it)
402 printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}"
403 chmod a+r "${WELLKNOWN}/${challenge_token}"
404 keyauth_hook="${keyauth}"
407 # Generate DNS entry content for dns-01 validation
408 keyauth_hook="$(printf '%s' "${keyauth}" | openssl dgst -sha256 -binary | urlbase64)"
412 challenge_uris[${idx}]="${challenge_uri}"
413 keyauths[${idx}]="${keyauth}"
414 challenge_tokens[${idx}]="${challenge_token}"
415 # Note: assumes args will never have spaces!
416 deploy_args[${idx}]="${altname} ${challenge_token} ${keyauth_hook}"
420 # Wait for hook script to deploy the challenges if used
421 # shellcheck disable=SC2068
422 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[@]}
424 # Respond to challenges
426 for altname in ${altnames}; do
427 challenge_token="${challenge_tokens[${idx}]}"
428 keyauth="${keyauths[${idx}]}"
430 # Wait for hook script to deploy the challenge if used
431 # shellcheck disable=SC2086
432 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[${idx}]}
434 # Ask the acme-server to verify our challenge and wait until it is no longer pending
435 echo " + Responding to challenge for ${altname}..."
436 result="$(signed_request "${challenge_uris[${idx}]}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}' | clean_json)"
438 reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
440 while [[ "${reqstatus}" = "pending" ]]; do
442 result="$(http_request get "${challenge_uris[${idx}]}")"
443 reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
446 [[ "${CHALLENGETYPE}" = "http-01" ]] && rm -f "${WELLKNOWN}/${challenge_token}"
448 # Wait for hook script to clean the challenge if used
449 if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token}" ]]; then
450 # shellcheck disable=SC2086
451 "${HOOK}" "clean_challenge" ${deploy_args[${idx}]}
455 if [[ "${reqstatus}" = "valid" ]]; then
456 echo " + Challenge is valid!"
462 # Wait for hook script to clean the challenges if used
463 # shellcheck disable=SC2068
464 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "clean_challenge" ${deploy_args[@]}
466 if [[ "${reqstatus}" != "valid" ]]; then
467 # Clean up any remaining challenge_tokens if we stopped early
468 if [[ "${CHALLENGETYPE}" = "http-01" ]]; then
469 while [ ${idx} -lt ${#challenge_tokens[@]} ]; do
470 rm -f "${WELLKNOWN}/${challenge_tokens[${idx}]}"
475 _exiterr "Challenge is invalid! (returned: ${reqstatus}) (result: ${result})"
478 # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem
479 echo " + Requesting certificate..."
480 csr64="$( <<<"${csr}" openssl req -outform DER | urlbase64)"
481 crt64="$(signed_request "${CA_NEW_CERT}" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)"
482 crt="$( printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" )"
484 # Try to load the certificate to detect corruption
485 echo " + Checking certificate..."
486 _openssl x509 -text <<<"${crt}"
490 unset challenge_token
494 # Create certificate for domain(s)
498 timestamp="$(date +%s)"
500 echo " + Signing domains..."
501 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
502 _exiterr "Certificate authority doesn't allow certificate signing"
505 # If there is no existing certificate directory => make it
506 if [[ ! -e "${BASEDIR}/certs/${domain}" ]]; then
507 echo " + Creating new directory ${BASEDIR}/certs/${domain} ..."
508 mkdir -p "${BASEDIR}/certs/${domain}"
511 privkey="privkey.pem"
512 # generate a new private key if we need or want one
513 if [[ ! -r "${BASEDIR}/certs/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
514 echo " + Generating private key..."
515 privkey="privkey-${timestamp}.pem"
516 case "${KEY_ALGO}" in
517 rsa) _openssl genrsa -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}";;
518 prime256v1|secp384r1) _openssl ecparam -genkey -name "${KEY_ALGO}" -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem";;
522 # Generate signing request config and the actual signing request
523 echo " + Generating signing request..."
525 for altname in ${altnames}; do
526 SAN+="DNS:${altname}, "
529 local tmp_openssl_cnf
530 tmp_openssl_cnf="$(_mktemp)"
531 cat "${OPENSSL_CNF}" > "${tmp_openssl_cnf}"
532 printf "[SAN]\nsubjectAltName=%s" "${SAN}" >> "${tmp_openssl_cnf}"
533 openssl req -new -sha256 -key "${BASEDIR}/certs/${domain}/${privkey}" -out "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" -subj "/CN=${domain}/" -reqexts SAN -config "${tmp_openssl_cnf}"
534 rm -f "${tmp_openssl_cnf}"
536 crt_path="${BASEDIR}/certs/${domain}/cert-${timestamp}.pem"
537 # shellcheck disable=SC2086
538 sign_csr "$(< "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" )" ${altnames} 3>"${crt_path}"
540 # Create fullchain.pem
541 echo " + Creating fullchain.pem..."
542 cat "${crt_path}" > "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
543 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-${timestamp}.pem"
544 if ! grep -q "BEGIN CERTIFICATE" "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem"; then
545 openssl x509 -in "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" -inform DER -out "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" -outform PEM
547 cat "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" >> "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
550 [[ "${privkey}" = "privkey.pem" ]] || ln -sf "privkey-${timestamp}.pem" "${BASEDIR}/certs/${domain}/privkey.pem"
552 ln -sf "chain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/chain.pem"
553 ln -sf "fullchain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/fullchain.pem"
554 ln -sf "cert-${timestamp}.csr" "${BASEDIR}/certs/${domain}/cert.csr"
555 ln -sf "cert-${timestamp}.pem" "${BASEDIR}/certs/${domain}/cert.pem"
557 # Wait for hook script to clean the challenge and to deploy cert if used
559 [[ -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}"
561 unset challenge_token
566 # Description: Sign/renew non-existant/changed/expiring certificates.
567 command_sign_domains() {
570 if [[ -n "${PARAM_DOMAIN:-}" ]]; then
571 DOMAINS_TXT="$(_mktemp)"
572 printf -- "${PARAM_DOMAIN}" > "${DOMAINS_TXT}"
573 elif [[ -e "${BASEDIR}/domains.txt" ]]; then
574 DOMAINS_TXT="${BASEDIR}/domains.txt"
576 _exiterr "domains.txt not found and --domain not given"
579 # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire
582 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
584 domain="$(printf '%s\n' "${line}" | cut -d' ' -f1)"
585 morenames="$(printf '%s\n' "${line}" | cut -s -d' ' -f2-)"
586 cert="${BASEDIR}/certs/${domain}/cert.pem"
588 force_renew="${PARAM_FORCE:-no}"
590 if [[ -z "${morenames}" ]];then
591 echo "Processing ${domain}"
593 echo "Processing ${domain} with alternative names: ${morenames}"
596 if [[ -e "${cert}" ]]; then
597 printf " + Checking domain name(s) of existing cert..."
599 certnames="$(openssl x509 -in "${cert}" -text -noout | grep DNS: | _sed 's/DNS://g' | tr -d ' ' | tr ',' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//')"
600 givennames="$(echo "${domain}" "${morenames}"| tr ' ' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//' | _sed 's/^ //')"
602 if [[ "${certnames}" = "${givennames}" ]]; then
606 echo " + Domain name(s) are not matching!"
607 echo " + Names in old certificate: ${certnames}"
608 echo " + Configured names: ${givennames}"
609 echo " + Forcing renew."
614 if [[ -e "${cert}" ]]; then
615 echo " + Checking expire date of existing cert..."
616 valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )"
618 printf " + Valid till %s " "${valid}"
619 if openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; then
620 printf "(Longer than %d days). " "${RENEW_DAYS}"
621 if [[ "${force_renew}" = "yes" ]]; then
622 echo "Ignoring because renew was forced!"
624 # Certificate-Names unchanged and cert is still valid
625 echo "Skipping renew!"
626 [[ -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"
630 echo "(Less than ${RENEW_DAYS} days). Renewing!"
634 # shellcheck disable=SC2086
638 # remove temporary domains.txt file if used
639 [[ -n "${PARAM_DOMAIN:-}" ]] && rm -f "${DOMAINS_TXT}"
644 # Usage: --signcsr (-s) path/to/csr.pem
645 # Description: Sign a given CSR, output CRT on stdout (advanced usage)
647 # redirect stdout to stderr
648 # leave stdout over at fd 3 to output the cert
654 if [ ! -r "${csrfile}" ]; then
655 _exiterr "Could not read certificate signing request ${csrfile}"
658 sign_csr "$(< "${csrfile}" )"
663 # Usage: --revoke (-r) path/to/cert.pem
664 # Description: Revoke specified certificate
668 [[ -n "${CA_REVOKE_CERT}" ]] || _exiterr "Certificate authority doesn't allow certificate revocation."
671 if [[ -L "${cert}" ]]; then
672 # follow symlink and use real certificate name (so we move the real file and not the symlink at the end)
674 link_target="$(readlink -n "${cert}")"
675 if [[ "${link_target}" =~ ^/ ]]; then
676 cert="${link_target}"
678 cert="$(dirname "${cert}")/${link_target}"
681 [[ -f "${cert}" ]] || _exiterr "Could not find certificate ${cert}"
683 echo "Revoking ${cert}"
685 cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)"
686 response="$(signed_request "${CA_REVOKE_CERT}" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}' | clean_json)"
687 # if there is a problem with our revoke request _request (via signed_request) will report this and "exit 1" out
688 # so if we are here, it is safe to assume the request was successful
690 echo " + Renaming certificate to ${cert}-revoked"
691 mv -f "${cert}" "${cert}-revoked"
694 # Usage: --cleanup (-gc)
695 # Description: Move unused certificate files to archive directory
699 # Create global archive directory if not existant
700 if [[ ! -e "${BASEDIR}/archive" ]]; then
701 mkdir "${BASEDIR}/archive"
704 # Loop over all certificate directories
705 for certdir in "${BASEDIR}/certs/"*; do
706 # Skip if entry is not a folder
707 [[ -d "${certdir}" ]] || continue
709 # Get certificate name
710 certname="$(basename "${certdir}")"
712 # Create certitifaces archive directory if not existant
713 archivedir="${BASEDIR}/archive/${certname}"
714 if [[ ! -e "${archivedir}" ]]; then
715 mkdir "${archivedir}"
718 # Loop over file-types (certificates, keys, signing-requests, ...)
719 for filetype in cert.csr cert.pem chain.pem fullchain.pem privkey.pem; do
720 # Skip if symlink is broken
721 [[ -r "${certdir}/${filetype}" ]] || continue
723 # Look up current file in use
724 current="$(basename "$(readlink "${certdir}/${filetype}")")"
726 # Split filetype into name and extension
727 filebase="$(echo "${filetype}" | cut -d. -f1)"
728 fileext="$(echo "${filetype}" | cut -d. -f2)"
730 # Loop over all files of this type
731 for file in "${certdir}/${filebase}-"*".${fileext}"; do
732 # Handle case where no files match the wildcard
733 [[ -f "${file}" ]] || break
735 # Check if current file is in use, if unused move to archive directory
736 filename="$(basename "${file}")"
737 if [[ ! "${filename}" = "${current}" ]]; then
738 echo "Moving unused file to archive directory: ${certname}/${filename}"
739 mv "${certdir}/${filename}" "${archivedir}/${filename}"
749 # Description: Show help text
751 printf "Usage: %s [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...\n\n" "${0}"
752 printf "Default command: help\n\n"
754 grep -e '^[[:space:]]*# Usage:' -e '^[[:space:]]*# Description:' -e '^command_.*()[[:space:]]*{' "${0}" | while read -r usage; read -r description; read -r command; do
755 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]] || [[ ! "${command}" =~ ^command_ ]]; then
756 _exiterr "Error generating help text."
758 printf " %-32s %s\n" "${usage##"# Usage: "}" "${description##"# Description: "}"
760 printf -- "\nParameters:\n"
761 grep -E -e '^[[:space:]]*# PARAM_Usage:' -e '^[[:space:]]*# PARAM_Description:' "${0}" | while read -r usage; read -r description; do
762 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]]; then
763 _exiterr "Error generating help text."
765 printf " %-32s %s\n" "${usage##"# PARAM_Usage: "}" "${description##"# PARAM_Description: "}"
770 # Description: Output configuration variables for use in other scripts
772 echo "# letsencrypt.sh configuration"
774 typeset -p CA LICENSE CHALLENGETYPE HOOK HOOK_CHAIN RENEW_DAYS ACCOUNT_KEY ACCOUNT_KEY_JSON KEYSIZE WELLKNOWN PRIVATE_KEY_RENEW OPENSSL_CNF CONTACT_EMAIL LOCKFILE
777 # Main method (parses script arguments and calls command_* methods)
781 [[ -z "${COMMAND}" ]] || _exiterr "Only one command can be executed at a time. See help (-h) for more information."
786 if [[ -z "${1:-}" ]]; then
787 echo "The specified command requires additional parameters. See help:" >&2
791 elif [[ "${1:0:1}" = "-" ]]; then
792 _exiterr "Invalid argument: ${1}"
796 [[ -z "${@}" ]] && eval set -- "--help"
810 set_command sign_domains
816 check_parameters "${1:-}"
823 check_parameters "${1:-}"
824 PARAM_REVOKECERT="${1}"
831 # PARAM_Usage: --domain (-d) domain.tld
832 # PARAM_Description: Use specified domain name(s) instead of domains.txt entry (one certificate!)
835 check_parameters "${1:-}"
836 if [[ -z "${PARAM_DOMAIN:-}" ]]; then
839 PARAM_DOMAIN="${PARAM_DOMAIN} ${1}"
844 # PARAM_Usage: --force (-x)
845 # PARAM_Description: Force renew of certificate even if it is longer valid than value in RENEW_DAYS
850 # PARAM_Usage: --privkey (-p) path/to/key.pem
851 # PARAM_Description: Use specified private key instead of account key (useful for revocation)
854 check_parameters "${1:-}"
855 PARAM_ACCOUNT_KEY="${1}"
858 # PARAM_Usage: --config (-f) path/to/config.sh
859 # PARAM_Description: Use specified config file
862 check_parameters "${1:-}"
866 # PARAM_Usage: --hook (-k) path/to/hook.sh
867 # PARAM_Description: Use specified script for hooks
870 check_parameters "${1:-}"
874 # PARAM_Usage: --challenge (-t) http-01|dns-01
875 # PARAM_Description: Which challenge should be used? Currently http-01 and dns-01 are supported
878 check_parameters "${1:-}"
879 PARAM_CHALLENGETYPE="${1}"
882 # PARAM_Usage: --algo (-a) rsa|prime256v1|secp384r1
883 # PARAM_Description: Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
886 check_parameters "${1:-}"
887 PARAM_KEY_ALGO="${1}"
891 echo "Unknown parameter detected: ${1}" >&2
903 sign_domains) command_sign_domains;;
904 sign_csr) command_sign_csr "${PARAM_CSR}";;
905 revoke) command_revoke "${PARAM_REVOKECERT}";;
906 cleanup) command_cleanup;;
907 *) command_help; exit 1;;
914 # Check for missing dependencies