3 # letsencrypt.sh by lukas2511
4 # Source: https://github.com/lukas2511/letsencrypt.sh
9 [[ -n "${ZSH_VERSION:-}" ]] && set -o SH_WORD_SPLIT && set +o FUNCTION_ARGZERO
10 umask 077 # paranoid umask, we're creating private keys
12 # Find directory in which this script is stored by traversing all symbolic links
14 while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
15 DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
16 SOURCE="$(readlink "$SOURCE")"
17 [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
19 SCRIPTDIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
21 BASEDIR="${SCRIPTDIR}"
23 # Check for script dependencies
24 check_dependencies() {
25 # just execute some dummy and/or version commands to see if required tools exist and are actually usable
26 openssl version > /dev/null 2>&1 || _exiterr "This script requires an openssl binary."
27 _sed "" < /dev/null > /dev/null 2>&1 || _exiterr "This script requires sed with support for extended (modern) regular expressions."
28 command -v grep > /dev/null 2>&1 || _exiterr "This script requires grep."
29 mktemp -u -t XXXXXX > /dev/null 2>&1 || _exiterr "This script requires mktemp."
31 # curl returns with an error code in some ancient versions so we have to catch that
33 curl -V > /dev/null 2>&1
36 if [[ ! "${retcode}" = "0" ]] && [[ ! "${retcode}" = "2" ]]; then
37 _exiterr "This script requires curl."
41 # Setup default config values, search for and load configuration files
43 # Check for config in various locations
44 if [[ -z "${CONFIG:-}" ]]; then
45 for check_config in "/etc/letsencrypt.sh" "/usr/local/etc/letsencrypt.sh" "${PWD}" "${SCRIPTDIR}"; do
46 if [[ -e "${check_config}/config.sh" ]]; then
47 BASEDIR="${check_config}"
48 CONFIG="${check_config}/config.sh"
55 CA="https://acme-v01.api.letsencrypt.org/directory"
56 LICENSE="https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf"
57 CHALLENGETYPE="http-01"
65 PRIVATE_KEY_RENEW="no"
67 OPENSSL_CNF="$(openssl version -d | cut -d\" -f2)/openssl.cnf"
71 if [[ -z "${CONFIG:-}" ]]; then
73 echo "# !! WARNING !! No main config file found, using default config!" >&2
75 elif [[ -e "${CONFIG}" ]]; then
76 echo "# INFO: Using main config file ${CONFIG}"
77 BASEDIR="$(dirname "${CONFIG}")"
78 # shellcheck disable=SC1090
81 _exiterr "Specified config file doesn't exist."
84 if [[ -n "${CONFIG_D}" ]]; then
85 if [[ ! -d "${CONFIG_D}" ]]; then
86 _exiterr "The path ${CONFIG_D} specified for CONFIG_D does not point to a directory." >&2
89 for check_config_d in "${CONFIG_D}"/*.sh; do
90 if [[ ! -e "${check_config_d}" ]]; then
91 echo "# !! WARNING !! Extra configuration directory ${CONFIG_D} exists, but no configuration found in it." >&2
93 elif [[ -f "${check_config_d}" ]] && [[ -r "${check_config_d}" ]]; then
94 echo "# INFO: Using additional config file ${check_config_d}"
95 # shellcheck disable=SC1090
98 _exiterr "Specified additional config ${check_config_d} is not readable or not a file at all." >&2
103 # Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality.
104 BASEDIR="${BASEDIR%%/}"
106 # Check BASEDIR and set default variables
107 [[ -d "${BASEDIR}" ]] || _exiterr "BASEDIR does not exist: ${BASEDIR}"
109 [[ -z "${PRIVATE_KEY}" ]] && PRIVATE_KEY="${BASEDIR}/private_key.pem"
110 [[ -z "${WELLKNOWN}" ]] && WELLKNOWN="${BASEDIR}/.acme-challenges"
111 [[ -z "${LOCKFILE}" ]] && LOCKFILE="${BASEDIR}/lock"
113 [[ -n "${PARAM_HOOK:-}" ]] && HOOK="${PARAM_HOOK}"
114 [[ -n "${PARAM_CHALLENGETYPE:-}" ]] && CHALLENGETYPE="${PARAM_CHALLENGETYPE}"
115 [[ -n "${PARAM_KEY_ALGO:-}" ]] && KEY_ALGO="${PARAM_KEY_ALGO}"
117 [[ "${CHALLENGETYPE}" =~ (http-01|dns-01) ]] || _exiterr "Unknown challenge type ${CHALLENGETYPE}... can not continue."
118 if [[ "${CHALLENGETYPE}" = "dns-01" ]] && [[ -z "${HOOK}" ]]; then
119 _exiterr "Challenge type dns-01 needs a hook script for deployment... can not continue."
121 [[ "${KEY_ALGO}" =~ ^(rsa|prime256v1|secp384r1)$ ]] || _exiterr "Unknown public key algorithm ${KEY_ALGO}... can not continue."
128 # Lockfile handling (prevents concurrent access)
129 LOCKDIR="$(dirname "${LOCKFILE}")"
130 [[ -w "${LOCKDIR}" ]] || _exiterr "Directory ${LOCKDIR} for LOCKFILE ${LOCKFILE} is not writable, aborting."
131 ( set -C; date > "${LOCKFILE}" ) 2>/dev/null || _exiterr "Lock file '${LOCKFILE}' present, aborting."
132 remove_lock() { rm -f "${LOCKFILE}"; }
133 trap 'remove_lock' EXIT
136 CA_DIRECTORY="$(http_request get "${CA}")"
137 CA_NEW_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-cert)" &&
138 CA_NEW_AUTHZ="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-authz)" &&
139 CA_NEW_REG="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-reg)" &&
140 # shellcheck disable=SC2015
141 CA_REVOKE_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value revoke-cert)" ||
142 _exiterr "Problem retrieving ACME/CA-URLs, check if your configured CA points to the directory entrypoint."
144 # Export some environment variables to be used in hook script
145 export WELLKNOWN BASEDIR CONFIG
147 # Checking for private key ...
148 register_new_key="no"
149 if [[ -n "${PARAM_PRIVATE_KEY:-}" ]]; then
150 # a private key was specified from the command line so use it for this run
151 echo "Using private key ${PARAM_PRIVATE_KEY} instead of account key"
152 PRIVATE_KEY="${PARAM_PRIVATE_KEY}"
154 # Check if private account key exists, if it doesn't exist yet generate a new one (rsa key)
155 if [[ ! -e "${PRIVATE_KEY}" ]]; then
156 echo "+ Generating account key..."
157 _openssl genrsa -out "${PRIVATE_KEY}" "${KEYSIZE}"
158 register_new_key="yes"
161 openssl rsa -in "${PRIVATE_KEY}" -check 2>/dev/null > /dev/null || _exiterr "Private key is not valid, can not continue."
163 # Get public components from private key and calculate thumbprint
164 pubExponent64="$(printf '%x' "$(openssl rsa -in "${PRIVATE_KEY}" -noout -text | awk '/publicExponent/ {print $2}')" | hex2bin | urlbase64)"
165 pubMod64="$(openssl rsa -in "${PRIVATE_KEY}" -noout -modulus | cut -d'=' -f2 | hex2bin | urlbase64)"
167 thumbprint="$(printf '{"e":"%s","kty":"RSA","n":"%s"}' "${pubExponent64}" "${pubMod64}" | openssl dgst -sha256 -binary | urlbase64)"
169 # If we generated a new private key in the step above we have to register it with the acme-server
170 if [[ "${register_new_key}" = "yes" ]]; then
171 echo "+ Registering account key with letsencrypt..."
172 [[ ! -z "${CA_NEW_REG}" ]] || _exiterr "Certificate authority doesn't allow registrations."
173 # If an email for the contact has been provided then adding it to the registration request
174 if [[ -n "${CONTACT_EMAIL}" ]]; then
175 signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > /dev/null
177 signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > /dev/null
181 if [[ "${CHALLENGETYPE}" = "http-01" && ! -d "${WELLKNOWN}" ]]; then
182 _exiterr "WELLKNOWN directory doesn't exist, please create ${WELLKNOWN} and set appropriate permissions."
186 # Different sed version for different os types...
188 if [[ "${OSTYPE}" = "Linux" ]]; then
195 # Print error message and exit with error
197 echo "ERROR: ${1}" >&2
201 # Encode data as url-safe formatted base64
203 # urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_'
204 openssl base64 -e | tr -d '\n\r' | _sed -e 's:=*$::g' -e 'y:+/:-_:'
207 # Convert hex string to binary data
209 # Remove spaces, add leading zero, escape as hex string and parse with printf
210 printf -- "$(cat | _sed -e 's/[[:space:]]//g' -e 's/^(.(.{2})*)$/0\1/' -e 's/(.{2})/\\x\1/g')"
213 # Get string value from json dictionary
214 get_json_string_value() {
216 filter=$(printf 's/.*"%s": *"\([^"]*\)".*/\\1/p' "$1")
220 # OpenSSL writes to stderr/stdout even when there are no errors. So just
221 # display the output if the exit code was != 0 to simplify debugging.
224 out="$(openssl "${@}" 2>&1)"
227 if [[ ${res} -ne 0 ]]; then
228 echo " + ERROR: failed to run $* (Exitcode: ${res})" >&2
237 # Send http(s) request with specified method
239 tempcont="$(mktemp -t XXXXXX)"
242 if [[ "${1}" = "head" ]]; then
243 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)"
245 elif [[ "${1}" = "get" ]]; then
246 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}")"
248 elif [[ "${1}" = "post" ]]; then
249 statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")"
253 _exiterr "Unknown request method: ${1}"
257 if [[ ! "${curlret}" = "0" ]]; then
258 _exiterr "Problem connecting to server (curl returned with ${curlret})"
261 if [[ ! "${statuscode:0:1}" = "2" ]]; then
262 echo " + ERROR: An error occurred while sending ${1}-request to ${2} (Status ${statuscode})" >&2
265 cat "${tempcont}" >&2
268 # Wait for hook script to clean the challenge if used
269 if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token:+set}" ]]; then
270 "${HOOK}" "clean_challenge" '' "${challenge_token}" "${keyauth}"
273 # remove temporary domains.txt file if used
274 [[ -n "${PARAM_DOMAIN:-}" && -n "${DOMAINS_TXT:-}" ]] && rm "${DOMAINS_TXT}"
282 # Send signed request
284 # Encode payload as urlbase64
285 payload64="$(printf '%s' "${2}" | urlbase64)"
287 # Retrieve nonce from acme-server
288 nonce="$(http_request head "${CA}" | grep Replay-Nonce: | awk -F ': ' '{print $2}' | tr -d '\n\r')"
290 # Build header with just our public key and algorithm information
291 header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}'
293 # Build another header which also contains the previously received nonce and encode it as urlbase64
294 protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}'
295 protected64="$(printf '%s' "${protected}" | urlbase64)"
297 # Sign header with nonce and our payload with our private key and encode signature as urlbase64
298 signed64="$(printf '%s' "${protected64}.${payload64}" | openssl dgst -sha256 -sign "${PRIVATE_KEY}" | urlbase64)"
300 # Send header + extended header + payload + signature to the acme-server
301 data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
303 http_request post "${1}" "${data}"
306 # Extracts all subject names from a CSR
307 # Outputs either the CN, or the SANs, one per line
309 csr="${1}" # the CSR itself (not a file)
311 if ! <<<"${csr}" openssl req -verify -noout 2>/dev/null; then
312 _exiterr "Certificate signing request isn't valid"
315 reqtext="$( <<<"${csr}" openssl req -noout -text )"
316 if <<<"${reqtext}" grep -q '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$'; then
317 # SANs used, extract these
318 altnames="$( <<<"${reqtext}" grep -A1 '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$' | tail -n1 )"
319 # split to one per line:
320 # shellcheck disable=SC1003
321 altnames="$( <<<"${altnames}" _sed -e 's/^[[:space:]]*//; s/, /\'$'\n''/g' )"
322 # we can only get DNS: ones signed
323 if grep -qv '^DNS:' <<<"${altnames}"; then
324 _exiterr "Certificate signing request contains non-DNS Subject Alternative Names"
326 # strip away the DNS: prefix
327 altnames="$( <<<"${altnames}" _sed -e 's/^DNS://' )"
331 # No SANs, extract CN
332 altnames="$( <<<"${reqtext}" grep '^[[:space:]]*Subject:' | _sed -e 's/.* CN=([^ /,]*).*/\1/' )"
337 # Create certificate for domain(s) and outputs it FD 3
339 csr="${1}" # the CSR itself (not a file)
341 if { true >&3; } 2>/dev/null; then
344 _exiterr "sign_csr: FD 3 not open"
349 if [ -z "${altnames}" ]; then
350 altnames="$( extract_altnames "${csr}" )"
353 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
354 _exiterr "Certificate authority doesn't allow certificate signing"
358 if [[ -n "${ZSH_VERSION:-}" ]]; then
359 local -A challenge_uris challenge_tokens keyauths deploy_args
361 local -a challenge_uris challenge_tokens keyauths deploy_args
365 for altname in ${altnames}; do
366 # Ask the acme-server for new challenge token and extract them from the resulting json block
367 echo " + Requesting challenge for ${altname}..."
368 response="$(signed_request "${CA_NEW_AUTHZ}" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}')"
370 challenges="$(printf '%s\n' "${response}" | sed -n 's/.*\("challenges":[^\[]*\[[^]]*]\).*/\1/p')"
371 repl=$'\n''{' # fix syntax highlighting in Vim
372 challenge="$(printf "%s" "${challenges//\{/${repl}}" | grep \""${CHALLENGETYPE}"\")"
373 challenge_token="$(printf '%s' "${challenge}" | get_json_string_value token | _sed 's/[^A-Za-z0-9_\-]/_/g')"
374 challenge_uri="$(printf '%s' "${challenge}" | get_json_string_value uri)"
376 if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then
377 _exiterr "Can't retrieve challenges (${response})"
380 # Challenge response consists of the challenge token and the thumbprint of our public certificate
381 keyauth="${challenge_token}.${thumbprint}"
383 case "${CHALLENGETYPE}" in
385 # Store challenge response in well-known location and make world-readable (so that a webserver can access it)
386 printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}"
387 chmod a+r "${WELLKNOWN}/${challenge_token}"
388 keyauth_hook="${keyauth}"
391 # Generate DNS entry content for dns-01 validation
392 keyauth_hook="$(printf '%s' "${keyauth}" | openssl dgst -sha256 -binary | urlbase64)"
396 challenge_uris[${idx}]="${challenge_uri}"
397 keyauths[${idx}]="${keyauth}"
398 challenge_tokens[${idx}]="${challenge_token}"
399 # Note: assumes args will never have spaces!
400 deploy_args[${idx}]="${altname} ${challenge_token} ${keyauth_hook}"
404 # Wait for hook script to deploy the challenges if used
405 # shellcheck disable=SC2068
406 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[@]}
408 # Respond to challenges
410 for altname in ${altnames}; do
411 challenge_token="${challenge_tokens[${idx}]}"
412 keyauth="${keyauths[${idx}]}"
414 # Wait for hook script to deploy the challenge if used
415 # shellcheck disable=SC2086
416 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[${idx}]}
418 # Ask the acme-server to verify our challenge and wait until it is no longer pending
419 echo " + Responding to challenge for ${altname}..."
420 result="$(signed_request "${challenge_uris[${idx}]}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}')"
422 reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
424 while [[ "${reqstatus}" = "pending" ]]; do
426 result="$(http_request get "${challenge_uris[${idx}]}")"
427 reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
430 [[ "${CHALLENGETYPE}" = "http-01" ]] && rm -f "${WELLKNOWN}/${challenge_token}"
432 # Wait for hook script to clean the challenge if used
433 if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token}" ]]; then
434 # shellcheck disable=SC2086
435 "${HOOK}" "clean_challenge" ${deploy_args[${idx}]}
439 if [[ "${reqstatus}" = "valid" ]]; then
440 echo " + Challenge is valid!"
446 # Wait for hook script to clean the challenges if used
447 # shellcheck disable=SC2068
448 [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "clean_challenge" ${deploy_args[@]}
450 if [[ "${reqstatus}" != "valid" ]]; then
451 # Clean up any remaining challenge_tokens if we stopped early
452 if [[ "${CHALLENGETYPE}" = "http-01" ]]; then
453 while [ ${idx} -lt ${#challenge_tokens[@]} ]; do
454 rm -f "${WELLKNOWN}/${challenge_tokens[${idx}]}"
459 _exiterr "Challenge is invalid! (returned: ${reqstatus}) (result: ${result})"
462 # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem
463 echo " + Requesting certificate..."
464 csr64="$( <<<"${csr}" openssl req -outform DER | urlbase64)"
465 crt64="$(signed_request "${CA_NEW_CERT}" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)"
466 crt="$( printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" )"
468 # Try to load the certificate to detect corruption
469 echo " + Checking certificate..."
470 _openssl x509 -text <<<"${crt}"
474 unset challenge_token
478 # Create certificate for domain(s)
482 timestamp="$(date +%s)"
484 echo " + Signing domains..."
485 if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
486 _exiterr "Certificate authority doesn't allow certificate signing"
489 # If there is no existing certificate directory => make it
490 if [[ ! -e "${BASEDIR}/certs/${domain}" ]]; then
491 echo " + Creating new directory ${BASEDIR}/certs/${domain} ..."
492 mkdir -p "${BASEDIR}/certs/${domain}"
495 privkey="privkey.pem"
496 # generate a new private key if we need or want one
497 if [[ ! -r "${BASEDIR}/certs/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
498 echo " + Generating private key..."
499 privkey="privkey-${timestamp}.pem"
500 case "${KEY_ALGO}" in
501 rsa) _openssl genrsa -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}";;
502 prime256v1|secp384r1) _openssl ecparam -genkey -name "${KEY_ALGO}" -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem";;
506 # Generate signing request config and the actual signing request
507 echo " + Generating signing request..."
509 for altname in ${altnames}; do
510 SAN+="DNS:${altname}, "
513 local tmp_openssl_cnf
514 tmp_openssl_cnf="$(mktemp -t XXXXXX)"
515 cat "${OPENSSL_CNF}" > "${tmp_openssl_cnf}"
516 printf "[SAN]\nsubjectAltName=%s" "${SAN}" >> "${tmp_openssl_cnf}"
517 openssl req -new -sha256 -key "${BASEDIR}/certs/${domain}/${privkey}" -out "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" -subj "/CN=${domain}/" -reqexts SAN -config "${tmp_openssl_cnf}"
518 rm -f "${tmp_openssl_cnf}"
520 crt_path="${BASEDIR}/certs/${domain}/cert-${timestamp}.pem"
521 # shellcheck disable=SC2086
522 sign_csr "$(< "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" )" ${altnames} 3>"${crt_path}"
524 # Create fullchain.pem
525 echo " + Creating fullchain.pem..."
526 cat "${crt_path}" > "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
527 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-${timestamp}.pem"
528 if ! grep -q "BEGIN CERTIFICATE" "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem"; then
529 openssl x509 -in "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" -inform DER -out "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" -outform PEM
531 cat "${BASEDIR}/certs/${domain}/chain-${timestamp}.pem" >> "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
534 [[ "${privkey}" = "privkey.pem" ]] || ln -sf "privkey-${timestamp}.pem" "${BASEDIR}/certs/${domain}/privkey.pem"
536 ln -sf "chain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/chain.pem"
537 ln -sf "fullchain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/fullchain.pem"
538 ln -sf "cert-${timestamp}.csr" "${BASEDIR}/certs/${domain}/cert.csr"
539 ln -sf "cert-${timestamp}.pem" "${BASEDIR}/certs/${domain}/cert.pem"
541 # Wait for hook script to clean the challenge and to deploy cert if used
542 [[ -n "${HOOK}" ]] && "${HOOK}" "deploy_cert" "${domain}" "${BASEDIR}/certs/${domain}/privkey.pem" "${BASEDIR}/certs/${domain}/cert.pem" "${BASEDIR}/certs/${domain}/fullchain.pem" "${BASEDIR}/certs/${domain}/chain.pem"
544 unset challenge_token
549 # Description: Sign/renew non-existant/changed/expiring certificates.
550 command_sign_domains() {
553 if [[ -n "${PARAM_DOMAIN:-}" ]]; then
554 DOMAINS_TXT="$(mktemp -t XXXXXX)"
555 printf -- "${PARAM_DOMAIN}" > "${DOMAINS_TXT}"
556 elif [[ -e "${BASEDIR}/domains.txt" ]]; then
557 DOMAINS_TXT="${BASEDIR}/domains.txt"
559 _exiterr "domains.txt not found and --domain not given"
562 # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire
565 for line in $(<"${DOMAINS_TXT}" tr -d '\r' | _sed -e 's/^[[:space:]]*//g' -e 's/[[:space:]]*$//g' -e 's/[[:space:]]+/ /g' | (grep -vE '^(#|$)' || true)); do
567 domain="$(printf '%s\n' "${line}" | cut -d' ' -f1)"
568 morenames="$(printf '%s\n' "${line}" | cut -s -d' ' -f2-)"
569 cert="${BASEDIR}/certs/${domain}/cert.pem"
571 force_renew="${PARAM_FORCE:-no}"
573 if [[ -z "${morenames}" ]];then
574 echo "Processing ${domain}"
576 echo "Processing ${domain} with alternative names: ${morenames}"
579 if [[ -e "${cert}" ]]; then
580 printf " + Checking domain name(s) of existing cert..."
582 certnames="$(openssl x509 -in "${cert}" -text -noout | grep DNS: | _sed 's/DNS://g' | tr -d ' ' | tr ',' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//')"
583 givennames="$(echo "${domain}" "${morenames}"| tr ' ' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//' | _sed 's/^ //')"
585 if [[ "${certnames}" = "${givennames}" ]]; then
589 echo " + Domain name(s) are not matching!"
590 echo " + Names in old certificate: ${certnames}"
591 echo " + Configured names: ${givennames}"
592 echo " + Forcing renew."
597 if [[ -e "${cert}" ]]; then
598 echo " + Checking expire date of existing cert..."
599 valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )"
601 printf " + Valid till %s " "${valid}"
602 if openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; then
603 printf "(Longer than %d days). " "${RENEW_DAYS}"
604 if [[ "${force_renew}" = "yes" ]]; then
605 echo "Ignoring because renew was forced!"
607 # Certificate-Names unchanged and cert is still valid
608 echo "Skipping renew!"
609 [[ -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"
613 echo "(Less than ${RENEW_DAYS} days). Renewing!"
617 # shellcheck disable=SC2086
621 # remove temporary domains.txt file if used
622 [[ -n "${PARAM_DOMAIN:-}" ]] && rm -f "${DOMAINS_TXT}"
627 # Usage: --signcsr (-s) path/to/csr.pem
628 # Description: Sign a given CSR, output CRT on stdout (advanced usage)
630 # redirect stdout to stderr
631 # leave stdout over at fd 3 to output the cert
637 if [ ! -r "${csrfile}" ]; then
638 _exiterr "Could not read certificate signing request ${csrfile}"
641 sign_csr "$(< "${csrfile}" )"
646 # Usage: --revoke (-r) path/to/cert.pem
647 # Description: Revoke specified certificate
651 [[ -n "${CA_REVOKE_CERT}" ]] || _exiterr "Certificate authority doesn't allow certificate revocation."
654 if [[ -L "${cert}" ]]; then
655 # follow symlink and use real certificate name (so we move the real file and not the symlink at the end)
657 link_target="$(readlink -n "${cert}")"
658 if [[ "${link_target}" =~ ^/ ]]; then
659 cert="${link_target}"
661 cert="$(dirname "${cert}")/${link_target}"
664 [[ -f "${cert}" ]] || _exiterr "Could not find certificate ${cert}"
666 echo "Revoking ${cert}"
668 cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)"
669 response="$(signed_request "${CA_REVOKE_CERT}" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}')"
670 # if there is a problem with our revoke request _request (via signed_request) will report this and "exit 1" out
671 # so if we are here, it is safe to assume the request was successful
673 echo " + Renaming certificate to ${cert}-revoked"
674 mv -f "${cert}" "${cert}-revoked"
677 # Usage: --cleanup (-gc)
678 # Description: Move unused certificate files to archive directory
682 # Create global archive directory if not existant
683 if [[ ! -e "${BASEDIR}/archive" ]]; then
684 mkdir "${BASEDIR}/archive"
687 # Loop over all certificate directories
688 for certdir in "${BASEDIR}/certs/"*; do
689 # Skip if entry is not a folder
690 [[ -d "${certdir}" ]] || continue
692 # Get certificate name
693 certname="$(basename "${certdir}")"
695 # Create certitifaces archive directory if not existant
696 archivedir="${BASEDIR}/archive/${certname}"
697 if [[ ! -e "${archivedir}" ]]; then
698 mkdir "${archivedir}"
701 # Loop over file-types (certificates, keys, signing-requests, ...)
702 for filetype in cert.csr cert.pem chain.pem fullchain.pem privkey.pem; do
703 # Skip if symlink is broken
704 [[ -r "${certdir}/${filetype}" ]] || continue
706 # Look up current file in use
707 current="$(basename "$(readlink "${certdir}/${filetype}")")"
709 # Split filetype into name and extension
710 filebase="$(echo "${filetype}" | cut -d. -f1)"
711 fileext="$(echo "${filetype}" | cut -d. -f2)"
713 # Loop over all files of this type
714 for file in "${certdir}/${filebase}-"*".${fileext}"; do
715 # Handle case where no files match the wildcard
716 [[ -f "${file}" ]] || break
718 # Check if current file is in use, if unused move to archive directory
719 filename="$(basename "${file}")"
720 if [[ ! "${filename}" = "${current}" ]]; then
721 echo "Moving unused file to archive directory: ${certname}/${filename}"
722 mv "${certdir}/${filename}" "${archivedir}/${filename}"
732 # Description: Show help text
734 printf "Usage: %s [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...\n\n" "${0}"
735 printf "Default command: help\n\n"
737 grep -e '^[[:space:]]*# Usage:' -e '^[[:space:]]*# Description:' -e '^command_.*()[[:space:]]*{' "${0}" | while read -r usage; read -r description; read -r command; do
738 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]] || [[ ! "${command}" =~ ^command_ ]]; then
739 _exiterr "Error generating help text."
741 printf " %-32s %s\n" "${usage##"# Usage: "}" "${description##"# Description: "}"
743 printf -- "\nParameters:\n"
744 grep -E -e '^[[:space:]]*# PARAM_Usage:' -e '^[[:space:]]*# PARAM_Description:' "${0}" | while read -r usage; read -r description; do
745 if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]]; then
746 _exiterr "Error generating help text."
748 printf " %-32s %s\n" "${usage##"# PARAM_Usage: "}" "${description##"# PARAM_Description: "}"
753 # Description: Output configuration variables for use in other scripts
755 echo "# letsencrypt.sh configuration"
757 typeset -p CA LICENSE CHALLENGETYPE HOOK HOOK_CHAIN RENEW_DAYS PRIVATE_KEY KEYSIZE WELLKNOWN PRIVATE_KEY_RENEW OPENSSL_CNF CONTACT_EMAIL LOCKFILE
760 # Main method (parses script arguments and calls command_* methods)
764 [[ -z "${COMMAND}" ]] || _exiterr "Only one command can be executed at a time. See help (-h) for more information."
769 if [[ -z "${1:-}" ]]; then
770 echo "The specified command requires additional parameters. See help:" >&2
774 elif [[ "${1:0:1}" = "-" ]]; then
775 _exiterr "Invalid argument: ${1}"
779 [[ -z "${@}" ]] && eval set -- "--help"
793 set_command sign_domains
799 check_parameters "${1:-}"
806 check_parameters "${1:-}"
807 PARAM_REVOKECERT="${1}"
814 # PARAM_Usage: --domain (-d) domain.tld
815 # PARAM_Description: Use specified domain name(s) instead of domains.txt entry (one certificate!)
818 check_parameters "${1:-}"
819 if [[ -z "${PARAM_DOMAIN:-}" ]]; then
822 PARAM_DOMAIN="${PARAM_DOMAIN} ${1}"
827 # PARAM_Usage: --force (-x)
828 # PARAM_Description: Force renew of certificate even if it is longer valid than value in RENEW_DAYS
833 # PARAM_Usage: --privkey (-p) path/to/key.pem
834 # PARAM_Description: Use specified private key instead of account key (useful for revocation)
837 check_parameters "${1:-}"
838 PARAM_PRIVATE_KEY="${1}"
841 # PARAM_Usage: --config (-f) path/to/config.sh
842 # PARAM_Description: Use specified config file
845 check_parameters "${1:-}"
849 # PARAM_Usage: --hook (-k) path/to/hook.sh
850 # PARAM_Description: Use specified script for hooks
853 check_parameters "${1:-}"
857 # PARAM_Usage: --challenge (-t) http-01|dns-01
858 # PARAM_Description: Which challenge should be used? Currently http-01 and dns-01 are supported
861 check_parameters "${1:-}"
862 PARAM_CHALLENGETYPE="${1}"
865 # PARAM_Usage: --algo (-a) rsa|prime256v1|secp384r1
866 # PARAM_Description: Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
869 check_parameters "${1:-}"
870 PARAM_KEY_ALGO="${1}"
874 echo "Unknown parameter detected: ${1}" >&2
886 sign_domains) command_sign_domains;;
887 sign_csr) command_sign_csr "${PARAM_CSR}";;
888 revoke) command_revoke "${PARAM_REVOKECERT}";;
889 cleanup) command_cleanup;;
890 *) command_help; exit 1;;
897 # Check for missing dependencies