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Commit | Line | Data |
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2e8454b4 | 1 | #!/usr/bin/env bash |
61f0b7ed | 2 | |
69f3e78b LS |
3 | set -e |
4 | set -u | |
5 | set -o pipefail | |
61f0b7ed | 6 | |
401f5f75 | 7 | # Default config values |
f11bb1db | 8 | CA="https://acme-v01.api.letsencrypt.org" |
00a0937c | 9 | LICENSE="https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf" |
c24843c6 | 10 | HOOK= |
e300c0a1 | 11 | RENEW_DAYS="14" |
5a213f5f | 12 | KEYSIZE="4096" |
ff3dbc58 | 13 | WELLKNOWN=".acme-challenges" |
3dbbb461 | 14 | PRIVATE_KEY_RENEW=no |
1f08fda7 LS |
15 | SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )" |
16 | BASEDIR="${SCRIPTDIR}" | |
474f33d2 | 17 | OPENSSL_CNF="$(openssl version -d | cut -d'"' -f2)/openssl.cnf" |
329acb58 | 18 | ROOTCERT="lets-encrypt-x1-cross-signed.pem" |
ea5b70a3 | 19 | CONTACT_EMAIL= |
f11bb1db | 20 | |
401f5f75 LS |
21 | # If exists load config from same directory as this script |
22 | if [[ -e "${BASEDIR}/config.sh" ]]; then | |
219b3e9d | 23 | # shellcheck disable=SC1090 |
401f5f75 | 24 | . "${BASEDIR}/config.sh" |
440dc30d | 25 | fi |
61f0b7ed | 26 | |
401f5f75 LS |
27 | # Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality. |
28 | BASEDIR="${BASEDIR%%/}" | |
29 | ||
181dd0ff SR |
30 | umask 077 # paranoid umask, we're creating private keys |
31 | ||
c24843c6 | 32 | # Export some environment variables to be used in hook script |
33 | export WELLKNOWN | |
34 | export BASEDIR | |
35 | ||
c6e60302 LS |
36 | anti_newline() { |
37 | tr -d '\n\r' | |
38 | } | |
181dd0ff | 39 | |
61f0b7ed | 40 | urlbase64() { |
c6e60302 | 41 | # urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_' |
81cb6ac7 | 42 | openssl base64 -e | anti_newline | sed 's/=*$//g' | tr '+/' '-_' |
61f0b7ed | 43 | } |
91ce50af | 44 | |
9fe313d8 | 45 | hex2bin() { |
c6e60302 | 46 | # Store hex string from stdin |
20e7d9d7 LS |
47 | tmphex="$(cat)" |
48 | ||
c6e60302 | 49 | # Remove spaces |
20e7d9d7 LS |
50 | hex='' |
51 | for ((i=0; i<${#tmphex}; i+=1)); do | |
52 | test "${tmphex:$i:1}" == " " || hex="${hex}${tmphex:$i:1}" | |
53 | done | |
54 | ||
c6e60302 | 55 | # Add leading zero |
20e7d9d7 LS |
56 | test $((${#hex} & 1)) == 0 || hex="0${hex}" |
57 | ||
c6e60302 | 58 | # Convert to escaped string |
20e7d9d7 LS |
59 | escapedhex='' |
60 | for ((i=0; i<${#hex}; i+=2)); do | |
61 | escapedhex=$escapedhex\\x${hex:$i:2} | |
62 | done | |
63 | ||
c6e60302 | 64 | # Convert to binary data |
219b3e9d | 65 | printf -- "${escapedhex}" |
9fe313d8 | 66 | } |
61f0b7ed | 67 | |
91ce50af | 68 | _request() { |
3cb292cb LS |
69 | tempcont="$(mktemp)" |
70 | ||
dd5f36e5 | 71 | if [[ "${1}" = "head" ]]; then |
3cb292cb | 72 | statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)" |
dd5f36e5 | 73 | elif [[ "${1}" = "get" ]]; then |
3cb292cb | 74 | statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}")" |
dd5f36e5 | 75 | elif [[ "${1}" = "post" ]]; then |
3cb292cb | 76 | statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")" |
91ce50af | 77 | fi |
dd5f36e5 | 78 | |
3cb292cb LS |
79 | if [[ ! "${statuscode:0:1}" = "2" ]]; then |
80 | echo " + ERROR: An error occured while sending ${1}-request to ${2} (Status ${statuscode})" >&2 | |
81 | echo >&2 | |
82 | echo "Details:" >&2 | |
83 | echo "$(<"${tempcont}"))" >&2 | |
84 | rm -f "${tempcont}" | |
c24843c6 | 85 | |
86 | # Wait for hook script to clean the challenge if used | |
87 | if [[ -n "${HOOK}" ]]; then | |
88 | ${HOOK} "clean_challenge" "${challenge_token}" "${keyauth}" | |
89 | fi | |
90 | ||
dd5f36e5 | 91 | exit 1 |
130ea6ab | 92 | fi |
dd5f36e5 | 93 | |
3cb292cb LS |
94 | cat "${tempcont}" |
95 | rm -f "${tempcont}" | |
91ce50af LS |
96 | } |
97 | ||
61f0b7ed | 98 | signed_request() { |
c6e60302 | 99 | # Encode payload as urlbase64 |
4aa48d33 | 100 | payload64="$(printf '%s' "${2}" | urlbase64)" |
61f0b7ed | 101 | |
c6e60302 LS |
102 | # Retrieve nonce from acme-server |
103 | nonce="$(_request head "${CA}/directory" | grep Replay-Nonce: | awk -F ': ' '{print $2}' | anti_newline)" | |
61f0b7ed | 104 | |
c6e60302 | 105 | # Build header with just our public key and algorithm information |
61f0b7ed LS |
106 | header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}' |
107 | ||
c6e60302 | 108 | # Build another header which also contains the previously received nonce and encode it as urlbase64 |
61f0b7ed | 109 | protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}' |
4aa48d33 | 110 | protected64="$(printf '%s' "${protected}" | urlbase64)" |
61f0b7ed | 111 | |
c6e60302 | 112 | # Sign header with nonce and our payload with our private key and encode signature as urlbase64 |
5b29db97 | 113 | signed64="$(printf '%s' "${protected64}.${payload64}" | openssl dgst -sha256 -sign "${BASEDIR}/private_key.pem" | urlbase64)" |
61f0b7ed | 114 | |
c6e60302 | 115 | # Send header + extended header + payload + signature to the acme-server |
61f0b7ed LS |
116 | data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}' |
117 | ||
91ce50af | 118 | _request post "${1}" "${data}" |
61f0b7ed LS |
119 | } |
120 | ||
063d28a6 MG |
121 | revoke_cert() { |
122 | cert="${1}" | |
123 | cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)" | |
124 | response="$(signed_request "${CA}/acme/revoke-cert" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}')" | |
125 | # if there is a problem with our revoke request _request (via signed_request) will report this and "exit 1" out | |
126 | # so if we are here, it is safe to assume the request was successful | |
127 | echo " + SUCCESS" | |
128 | echo " + renaming certificate to ${cert}-revoked" | |
129 | mv -f "${cert}" "${cert}-revoked" | |
130 | } | |
131 | ||
61f0b7ed LS |
132 | sign_domain() { |
133 | domain="${1}" | |
1f65a335 | 134 | altnames="${*}" |
579e2316 | 135 | echo " + Signing domains..." |
61f0b7ed | 136 | |
3cc587c2 LS |
137 | timestamp="$(date +%s)" |
138 | ||
3dbbb461 | 139 | # If there is no existing certificate directory => make it |
5b29db97 AJM |
140 | if [[ ! -e "${BASEDIR}/certs/${domain}" ]]; then |
141 | echo " + make directory ${BASEDIR}/certs/${domain} ..." | |
142 | mkdir -p "${BASEDIR}/certs/${domain}" | |
3dbbb461 MG |
143 | fi |
144 | ||
f343dc11 | 145 | privkey="privkey.pem" |
3dbbb461 | 146 | # generate a new private key if we need or want one |
5b29db97 | 147 | if [[ ! -f "${BASEDIR}/certs/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then |
579e2316 | 148 | echo " + Generating private key..." |
f343dc11 | 149 | privkey="privkey-${timestamp}.pem" |
5b29db97 | 150 | openssl genrsa -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}" 2> /dev/null > /dev/null |
61f0b7ed LS |
151 | fi |
152 | ||
c6e60302 LS |
153 | # Generate signing request config and the actual signing request |
154 | SAN="" | |
61f0b7ed | 155 | for altname in $altnames; do |
c6e60302 LS |
156 | SAN+="DNS:${altname}, " |
157 | done | |
cd13a9c2 | 158 | SAN="${SAN%%, }" |
579e2316 | 159 | echo " + Generating signing request..." |
f343dc11 | 160 | openssl req -new -sha256 -key "${BASEDIR}/certs/${domain}/${privkey}" -out "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" -subj "/CN=${domain}/" -reqexts SAN -config <(cat "${OPENSSL_CNF}" <(printf "[SAN]\nsubjectAltName=%s" "${SAN}")) > /dev/null |
c6e60302 LS |
161 | |
162 | # Request and respond to challenges | |
163 | for altname in $altnames; do | |
164 | # Ask the acme-server for new challenge token and extract them from the resulting json block | |
579e2316 | 165 | echo " + Requesting challenge for ${altname}..." |
61f0b7ed LS |
166 | response="$(signed_request "${CA}/acme/new-authz" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}')" |
167 | ||
98a6c549 LS |
168 | challenges="$(printf '%s\n' "${response}" | grep -Eo '"challenges":[^\[]*\[[^]]*]')" |
169 | challenge="$(printf "%s" "${challenges//\{/$'\n'{}" | grep 'http-01')" | |
170 | challenge_token="$(printf '%s' "${challenge}" | grep -Eo '"token":\s*"[^"]*"' | cut -d'"' -f4 | sed 's/[^A-Za-z0-9_\-]/_/g')" | |
171 | challenge_uri="$(printf '%s' "${challenge}" | grep -Eo '"uri":\s*"[^"]*"' | cut -d'"' -f4)" | |
61f0b7ed | 172 | |
dd5f36e5 | 173 | if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then |
a1621214 | 174 | echo " + Error: Can't retrieve challenges (${response})" |
abb95693 LS |
175 | exit 1 |
176 | fi | |
177 | ||
c6e60302 | 178 | # Challenge response consists of the challenge token and the thumbprint of our public certificate |
61f0b7ed LS |
179 | keyauth="${challenge_token}.${thumbprint}" |
180 | ||
c6e60302 | 181 | # Store challenge response in well-known location and make world-readable (so that a webserver can access it) |
4aa48d33 | 182 | printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}" |
2b5df371 | 183 | chmod a+r "${WELLKNOWN}/${challenge_token}" |
61f0b7ed | 184 | |
b33f1288 | 185 | # Wait for hook script to deploy the challenge if used |
c24843c6 | 186 | if [[ -n "${HOOK}" ]]; then |
187 | ${HOOK} "deploy_challenge" "${challenge_token}" "${keyauth}" | |
b33f1288 SR |
188 | fi |
189 | ||
c6e60302 | 190 | # Ask the acme-server to verify our challenge and wait until it becomes valid |
579e2316 | 191 | echo " + Responding to challenge for ${altname}..." |
61f0b7ed LS |
192 | result="$(signed_request "${challenge_uri}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}')" |
193 | ||
4aa48d33 | 194 | status="$(printf '%s\n' "${result}" | grep -Eo '"status":\s*"[^"]*"' | cut -d'"' -f4)" |
61f0b7ed | 195 | |
76a37834 | 196 | # get status until it a result is reached => not pending anymore |
dd5f36e5 | 197 | while [[ "${status}" = "pending" ]]; do |
c6e60302 | 198 | sleep 1 |
76a37834 | 199 | status="$(_request get "${challenge_uri}" | grep -Eo '"status":\s*"[^"]*"' | cut -d'"' -f4)" |
61f0b7ed LS |
200 | done |
201 | ||
00837b86 LS |
202 | rm -f "${WELLKNOWN}/${challenge_token}" |
203 | ||
76a37834 | 204 | if [[ "${status}" = "valid" ]]; then |
579e2316 | 205 | echo " + Challenge is valid!" |
76a37834 | 206 | else |
579e2316 | 207 | echo " + Challenge is invalid! (returned: ${status})" |
c24843c6 | 208 | |
209 | # Wait for hook script to clean the challenge if used | |
210 | if [[ -n "${HOOK}" ]] && [[ -n "${challenge_token}" ]]; then | |
211 | ${HOOK} "clean_challenge" "${challenge_token}" "${keyauth}" | |
212 | fi | |
213 | ||
76a37834 MG |
214 | exit 1 |
215 | fi | |
216 | ||
61f0b7ed LS |
217 | done |
218 | ||
b7439a83 | 219 | # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem |
579e2316 | 220 | echo " + Requesting certificate..." |
f343dc11 | 221 | csr64="$(openssl req -in "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" -outform DER | urlbase64)" |
c6e60302 | 222 | crt64="$(signed_request "${CA}/acme/new-cert" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)" |
5b29db97 | 223 | printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" > "${BASEDIR}/certs/${domain}/cert-${timestamp}.pem" |
329acb58 LS |
224 | |
225 | # Create fullchain.pem | |
226 | if [[ -e "${BASEDIR}/certs/${ROOTCERT}" ]] || [[ -e "${SCRIPTDIR}/certs/${ROOTCERT}" ]]; then | |
227 | echo " + Creating fullchain.pem..." | |
15accf90 | 228 | cat "${BASEDIR}/certs/${domain}/cert-${timestamp}.pem" > "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem" |
329acb58 | 229 | if [[ -e "${BASEDIR}/certs/${ROOTCERT}" ]]; then |
15accf90 | 230 | cat "${BASEDIR}/certs/${ROOTCERT}" >> "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem" |
329acb58 | 231 | else |
15accf90 | 232 | cat "${SCRIPTDIR}/certs/${ROOTCERT}" >> "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem" |
329acb58 | 233 | fi |
329acb58 LS |
234 | rm -f "${BASEDIR}/certs/${domain}/fullchain.pem" |
235 | ln -s "fullchain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/fullchain.pem" | |
236 | fi | |
237 | ||
f343dc11 LS |
238 | # Update remaining symlinks |
239 | if [ ! "${privkey}" = "privkey.pem" ]; then | |
240 | rm -f "${BASEDIR}/certs/${domain}/privkey.pem" | |
241 | ln -s "privkey-${timestamp}.pem" "${BASEDIR}/certs/${domain}/privkey.pem" | |
242 | fi | |
243 | ||
244 | rm -f "${BASEDIR}/certs/${domain}/cert.csr" | |
245 | ln -s "cert-${timestamp}.csr" "${BASEDIR}/certs/${domain}/cert.csr" | |
246 | ||
247 | rm -f "${BASEDIR}/certs/${domain}/cert.pem" | |
248 | ln -s "cert-${timestamp}.pem" "${BASEDIR}/certs/${domain}/cert.pem" | |
249 | ||
c24843c6 | 250 | # Wait for hook script to clean the challenge and to deploy cert if used |
251 | if [[ -n "${HOOK}" ]]; then | |
252 | ${HOOK} "deploy_cert" "${BASEDIR}/certs/${domain}/privkey.pem" "${BASEDIR}/certs/${domain}/cert.pem" "${BASEDIR}/certs/${domain}/fullchain.pem" | |
253 | fi | |
254 | ||
255 | unset challenge_token | |
579e2316 | 256 | echo " + Done!" |
61f0b7ed LS |
257 | } |
258 | ||
5a213f5f | 259 | # Check if private key exists, if it doesn't exist yet generate a new one (rsa key) |
8221727a | 260 | register="0" |
5b29db97 | 261 | if [[ ! -e "${BASEDIR}/private_key.pem" ]]; then |
f13eaa7f | 262 | echo "+ Generating account key..." |
5b29db97 | 263 | openssl genrsa -out "${BASEDIR}/private_key.pem" "${KEYSIZE}" 2> /dev/null > /dev/null |
8221727a LS |
264 | register="1" |
265 | fi | |
266 | ||
c6e60302 | 267 | # Get public components from private key and calculate thumbprint |
5b29db97 AJM |
268 | pubExponent64="$(printf "%06x" "$(openssl rsa -in "${BASEDIR}/private_key.pem" -noout -text | grep publicExponent | head -1 | cut -d' ' -f2)" | hex2bin | urlbase64)" |
269 | pubMod64="$(printf '%s' "$(openssl rsa -in "${BASEDIR}/private_key.pem" -noout -modulus | cut -d'=' -f2)" | hex2bin | urlbase64)" | |
8221727a | 270 | |
c6e60302 | 271 | thumbprint="$(printf '%s' "$(printf '%s' '{"e":"'"${pubExponent64}"'","kty":"RSA","n":"'"${pubMod64}"'"}' | shasum -a 256 | awk '{print $1}')" | hex2bin | urlbase64)" |
8221727a | 272 | |
c6e60302 | 273 | # If we generated a new private key in the step above we have to register it with the acme-server |
dd5f36e5 | 274 | if [[ "${register}" = "1" ]]; then |
f13eaa7f | 275 | echo "+ Registering account key with letsencrypt..." |
ea5b70a3 | 276 | # if an email for the contact has been provided then adding it to the registration request |
277 | if [ -n "${CONTACT_EMAIL}" ]; then | |
278 | signed_request "${CA}/acme/new-reg" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > /dev/null | |
279 | else | |
280 | signed_request "${CA}/acme/new-reg" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > /dev/null | |
281 | fi | |
f13eaa7f LS |
282 | fi |
283 | ||
1f08fda7 LS |
284 | if [[ -e "${BASEDIR}/domains.txt" ]]; then |
285 | DOMAINS_TXT="${BASEDIR}/domains.txt" | |
286 | elif [[ -e "${SCRIPTDIR}/domains.txt" ]]; then | |
287 | DOMAINS_TXT="${SCRIPTDIR}/domains.txt" | |
288 | else | |
440dc30d LS |
289 | echo "You have to create a domains.txt file listing the domains you want certificates for. Have a look at domains.txt.example." |
290 | exit 1 | |
291 | fi | |
292 | ||
3390080c LS |
293 | if [[ ! -e "${WELLKNOWN}" ]]; then |
294 | mkdir -p "${WELLKNOWN}" | |
295 | fi | |
296 | ||
063d28a6 MG |
297 | # revoke certificate by user request |
298 | if [[ "${1:-}" = "revoke" ]]; then | |
299 | if [[ -z "{2:-}" ]] || [[ ! -f "${2}" ]]; then | |
ead15632 | 300 | echo "Usage: ${0} revoke path/to/cert.pem" |
063d28a6 MG |
301 | exit 1 |
302 | fi | |
c24843c6 | 303 | |
063d28a6 MG |
304 | echo "Revoking ${2}" |
305 | revoke_cert "${2}" | |
306 | ||
307 | exit 0 | |
308 | fi | |
309 | ||
1f08fda7 LS |
310 | # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire |
311 | <"${DOMAINS_TXT}" sed 's/^\s*//g;s/\s*$//g' | grep -v '^#' | grep -v '^$' | while read -r line; do | |
219b3e9d | 312 | domain="$(echo "${line}" | cut -d' ' -f1)" |
5b29db97 | 313 | cert="${BASEDIR}/certs/${domain}/cert.pem" |
579e2316 MG |
314 | |
315 | echo "Processing ${domain}" | |
316 | if [[ -e "${cert}" ]]; then | |
317 | echo " + Found existing cert..." | |
318 | ||
319 | # Turning off exit on non-zero status for cert validation | |
219b3e9d | 320 | set +e; openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; expiring=$?; set -e |
5b29db97 | 321 | valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )" |
579e2316 MG |
322 | |
323 | echo -n " + Valid till ${valid} " | |
5060dea0 | 324 | if [[ ${expiring} -eq 0 ]]; then |
579e2316 MG |
325 | echo "(Longer than ${RENEW_DAYS} days). Skipping!" |
326 | continue | |
5060dea0 | 327 | fi |
579e2316 | 328 | echo "(Less than ${RENEW_DAYS} days). Renewing!" |
5060dea0 MG |
329 | fi |
330 | ||
219b3e9d | 331 | # shellcheck disable=SC2086 |
6221526d | 332 | sign_domain $line |
61f0b7ed | 333 | done |