]>
Commit | Line | Data |
---|---|---|
2e8454b4 | 1 | #!/usr/bin/env bash |
61f0b7ed | 2 | |
69f3e78b LS |
3 | set -e |
4 | set -u | |
5 | set -o pipefail | |
61f0b7ed | 6 | |
16943702 LS |
7 | # Get the directory in which this script is stored |
8 | SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )" | |
9 | ||
401f5f75 | 10 | # Default config values |
f11bb1db | 11 | CA="https://acme-v01.api.letsencrypt.org" |
00a0937c | 12 | LICENSE="https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf" |
c24843c6 | 13 | HOOK= |
e300c0a1 | 14 | RENEW_DAYS="14" |
5a213f5f | 15 | KEYSIZE="4096" |
16943702 LS |
16 | WELLKNOWN="${SCRIPTDIR}/.acme-challenges" |
17 | PRIVATE_KEY_RENEW="no" | |
1f08fda7 | 18 | BASEDIR="${SCRIPTDIR}" |
474f33d2 | 19 | OPENSSL_CNF="$(openssl version -d | cut -d'"' -f2)/openssl.cnf" |
329acb58 | 20 | ROOTCERT="lets-encrypt-x1-cross-signed.pem" |
ea5b70a3 | 21 | CONTACT_EMAIL= |
f11bb1db | 22 | |
401f5f75 LS |
23 | # If exists load config from same directory as this script |
24 | if [[ -e "${BASEDIR}/config.sh" ]]; then | |
219b3e9d | 25 | # shellcheck disable=SC1090 |
401f5f75 | 26 | . "${BASEDIR}/config.sh" |
440dc30d | 27 | fi |
61f0b7ed | 28 | |
401f5f75 LS |
29 | # Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality. |
30 | BASEDIR="${BASEDIR%%/}" | |
31 | ||
181dd0ff SR |
32 | umask 077 # paranoid umask, we're creating private keys |
33 | ||
c24843c6 | 34 | # Export some environment variables to be used in hook script |
35 | export WELLKNOWN | |
36 | export BASEDIR | |
37 | ||
c6e60302 LS |
38 | anti_newline() { |
39 | tr -d '\n\r' | |
40 | } | |
181dd0ff | 41 | |
61f0b7ed | 42 | urlbase64() { |
c6e60302 | 43 | # urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_' |
81cb6ac7 | 44 | openssl base64 -e | anti_newline | sed 's/=*$//g' | tr '+/' '-_' |
61f0b7ed | 45 | } |
91ce50af | 46 | |
9fe313d8 | 47 | hex2bin() { |
c6e60302 | 48 | # Store hex string from stdin |
20e7d9d7 LS |
49 | tmphex="$(cat)" |
50 | ||
c6e60302 | 51 | # Remove spaces |
20e7d9d7 LS |
52 | hex='' |
53 | for ((i=0; i<${#tmphex}; i+=1)); do | |
54 | test "${tmphex:$i:1}" == " " || hex="${hex}${tmphex:$i:1}" | |
55 | done | |
56 | ||
c6e60302 | 57 | # Add leading zero |
20e7d9d7 LS |
58 | test $((${#hex} & 1)) == 0 || hex="0${hex}" |
59 | ||
c6e60302 | 60 | # Convert to escaped string |
20e7d9d7 LS |
61 | escapedhex='' |
62 | for ((i=0; i<${#hex}; i+=2)); do | |
63 | escapedhex=$escapedhex\\x${hex:$i:2} | |
64 | done | |
65 | ||
c6e60302 | 66 | # Convert to binary data |
219b3e9d | 67 | printf -- "${escapedhex}" |
9fe313d8 | 68 | } |
61f0b7ed | 69 | |
91ce50af | 70 | _request() { |
3cb292cb LS |
71 | tempcont="$(mktemp)" |
72 | ||
dd5f36e5 | 73 | if [[ "${1}" = "head" ]]; then |
3cb292cb | 74 | statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)" |
dd5f36e5 | 75 | elif [[ "${1}" = "get" ]]; then |
3cb292cb | 76 | statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}")" |
dd5f36e5 | 77 | elif [[ "${1}" = "post" ]]; then |
3cb292cb | 78 | statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")" |
91ce50af | 79 | fi |
dd5f36e5 | 80 | |
3cb292cb LS |
81 | if [[ ! "${statuscode:0:1}" = "2" ]]; then |
82 | echo " + ERROR: An error occured while sending ${1}-request to ${2} (Status ${statuscode})" >&2 | |
83 | echo >&2 | |
84 | echo "Details:" >&2 | |
85 | echo "$(<"${tempcont}"))" >&2 | |
86 | rm -f "${tempcont}" | |
c24843c6 | 87 | |
88 | # Wait for hook script to clean the challenge if used | |
89 | if [[ -n "${HOOK}" ]]; then | |
90 | ${HOOK} "clean_challenge" "${challenge_token}" "${keyauth}" | |
91 | fi | |
92 | ||
dd5f36e5 | 93 | exit 1 |
130ea6ab | 94 | fi |
dd5f36e5 | 95 | |
3cb292cb LS |
96 | cat "${tempcont}" |
97 | rm -f "${tempcont}" | |
91ce50af LS |
98 | } |
99 | ||
61f0b7ed | 100 | signed_request() { |
c6e60302 | 101 | # Encode payload as urlbase64 |
4aa48d33 | 102 | payload64="$(printf '%s' "${2}" | urlbase64)" |
61f0b7ed | 103 | |
c6e60302 LS |
104 | # Retrieve nonce from acme-server |
105 | nonce="$(_request head "${CA}/directory" | grep Replay-Nonce: | awk -F ': ' '{print $2}' | anti_newline)" | |
61f0b7ed | 106 | |
c6e60302 | 107 | # Build header with just our public key and algorithm information |
61f0b7ed LS |
108 | header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}' |
109 | ||
c6e60302 | 110 | # Build another header which also contains the previously received nonce and encode it as urlbase64 |
61f0b7ed | 111 | protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}' |
4aa48d33 | 112 | protected64="$(printf '%s' "${protected}" | urlbase64)" |
61f0b7ed | 113 | |
c6e60302 | 114 | # Sign header with nonce and our payload with our private key and encode signature as urlbase64 |
5b29db97 | 115 | signed64="$(printf '%s' "${protected64}.${payload64}" | openssl dgst -sha256 -sign "${BASEDIR}/private_key.pem" | urlbase64)" |
61f0b7ed | 116 | |
c6e60302 | 117 | # Send header + extended header + payload + signature to the acme-server |
61f0b7ed LS |
118 | data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}' |
119 | ||
91ce50af | 120 | _request post "${1}" "${data}" |
61f0b7ed LS |
121 | } |
122 | ||
063d28a6 MG |
123 | revoke_cert() { |
124 | cert="${1}" | |
125 | cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)" | |
126 | response="$(signed_request "${CA}/acme/revoke-cert" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}')" | |
127 | # if there is a problem with our revoke request _request (via signed_request) will report this and "exit 1" out | |
128 | # so if we are here, it is safe to assume the request was successful | |
129 | echo " + SUCCESS" | |
130 | echo " + renaming certificate to ${cert}-revoked" | |
131 | mv -f "${cert}" "${cert}-revoked" | |
132 | } | |
133 | ||
61f0b7ed LS |
134 | sign_domain() { |
135 | domain="${1}" | |
1f65a335 | 136 | altnames="${*}" |
579e2316 | 137 | echo " + Signing domains..." |
61f0b7ed | 138 | |
3cc587c2 LS |
139 | timestamp="$(date +%s)" |
140 | ||
3dbbb461 | 141 | # If there is no existing certificate directory => make it |
5b29db97 AJM |
142 | if [[ ! -e "${BASEDIR}/certs/${domain}" ]]; then |
143 | echo " + make directory ${BASEDIR}/certs/${domain} ..." | |
144 | mkdir -p "${BASEDIR}/certs/${domain}" | |
3dbbb461 MG |
145 | fi |
146 | ||
f343dc11 | 147 | privkey="privkey.pem" |
3dbbb461 | 148 | # generate a new private key if we need or want one |
5b29db97 | 149 | if [[ ! -f "${BASEDIR}/certs/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then |
579e2316 | 150 | echo " + Generating private key..." |
f343dc11 | 151 | privkey="privkey-${timestamp}.pem" |
5b29db97 | 152 | openssl genrsa -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}" 2> /dev/null > /dev/null |
61f0b7ed LS |
153 | fi |
154 | ||
c6e60302 LS |
155 | # Generate signing request config and the actual signing request |
156 | SAN="" | |
61f0b7ed | 157 | for altname in $altnames; do |
c6e60302 LS |
158 | SAN+="DNS:${altname}, " |
159 | done | |
cd13a9c2 | 160 | SAN="${SAN%%, }" |
579e2316 | 161 | echo " + Generating signing request..." |
f343dc11 | 162 | openssl req -new -sha256 -key "${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 |
163 | |
164 | # Request and respond to challenges | |
165 | for altname in $altnames; do | |
166 | # Ask the acme-server for new challenge token and extract them from the resulting json block | |
579e2316 | 167 | echo " + Requesting challenge for ${altname}..." |
61f0b7ed LS |
168 | response="$(signed_request "${CA}/acme/new-authz" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}')" |
169 | ||
98a6c549 LS |
170 | challenges="$(printf '%s\n' "${response}" | grep -Eo '"challenges":[^\[]*\[[^]]*]')" |
171 | challenge="$(printf "%s" "${challenges//\{/$'\n'{}" | grep 'http-01')" | |
172 | challenge_token="$(printf '%s' "${challenge}" | grep -Eo '"token":\s*"[^"]*"' | cut -d'"' -f4 | sed 's/[^A-Za-z0-9_\-]/_/g')" | |
173 | challenge_uri="$(printf '%s' "${challenge}" | grep -Eo '"uri":\s*"[^"]*"' | cut -d'"' -f4)" | |
61f0b7ed | 174 | |
dd5f36e5 | 175 | if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then |
a1621214 | 176 | echo " + Error: Can't retrieve challenges (${response})" |
abb95693 LS |
177 | exit 1 |
178 | fi | |
179 | ||
c6e60302 | 180 | # Challenge response consists of the challenge token and the thumbprint of our public certificate |
61f0b7ed LS |
181 | keyauth="${challenge_token}.${thumbprint}" |
182 | ||
c6e60302 | 183 | # Store challenge response in well-known location and make world-readable (so that a webserver can access it) |
4aa48d33 | 184 | printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}" |
2b5df371 | 185 | chmod a+r "${WELLKNOWN}/${challenge_token}" |
61f0b7ed | 186 | |
b33f1288 | 187 | # Wait for hook script to deploy the challenge if used |
c24843c6 | 188 | if [[ -n "${HOOK}" ]]; then |
189 | ${HOOK} "deploy_challenge" "${challenge_token}" "${keyauth}" | |
b33f1288 SR |
190 | fi |
191 | ||
c6e60302 | 192 | # Ask the acme-server to verify our challenge and wait until it becomes valid |
579e2316 | 193 | echo " + Responding to challenge for ${altname}..." |
61f0b7ed LS |
194 | result="$(signed_request "${challenge_uri}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}')" |
195 | ||
4aa48d33 | 196 | status="$(printf '%s\n' "${result}" | grep -Eo '"status":\s*"[^"]*"' | cut -d'"' -f4)" |
61f0b7ed | 197 | |
76a37834 | 198 | # get status until it a result is reached => not pending anymore |
dd5f36e5 | 199 | while [[ "${status}" = "pending" ]]; do |
c6e60302 | 200 | sleep 1 |
76a37834 | 201 | status="$(_request get "${challenge_uri}" | grep -Eo '"status":\s*"[^"]*"' | cut -d'"' -f4)" |
61f0b7ed LS |
202 | done |
203 | ||
00837b86 LS |
204 | rm -f "${WELLKNOWN}/${challenge_token}" |
205 | ||
76a37834 | 206 | if [[ "${status}" = "valid" ]]; then |
579e2316 | 207 | echo " + Challenge is valid!" |
76a37834 | 208 | else |
579e2316 | 209 | echo " + Challenge is invalid! (returned: ${status})" |
c24843c6 | 210 | |
211 | # Wait for hook script to clean the challenge if used | |
212 | if [[ -n "${HOOK}" ]] && [[ -n "${challenge_token}" ]]; then | |
213 | ${HOOK} "clean_challenge" "${challenge_token}" "${keyauth}" | |
214 | fi | |
215 | ||
76a37834 MG |
216 | exit 1 |
217 | fi | |
218 | ||
61f0b7ed LS |
219 | done |
220 | ||
b7439a83 | 221 | # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem |
579e2316 | 222 | echo " + Requesting certificate..." |
f343dc11 | 223 | csr64="$(openssl req -in "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" -outform DER | urlbase64)" |
c6e60302 | 224 | crt64="$(signed_request "${CA}/acme/new-cert" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)" |
5b29db97 | 225 | printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" > "${BASEDIR}/certs/${domain}/cert-${timestamp}.pem" |
329acb58 LS |
226 | |
227 | # Create fullchain.pem | |
228 | if [[ -e "${BASEDIR}/certs/${ROOTCERT}" ]] || [[ -e "${SCRIPTDIR}/certs/${ROOTCERT}" ]]; then | |
229 | echo " + Creating fullchain.pem..." | |
15accf90 | 230 | cat "${BASEDIR}/certs/${domain}/cert-${timestamp}.pem" > "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem" |
329acb58 | 231 | if [[ -e "${BASEDIR}/certs/${ROOTCERT}" ]]; then |
15accf90 | 232 | cat "${BASEDIR}/certs/${ROOTCERT}" >> "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem" |
329acb58 | 233 | else |
15accf90 | 234 | cat "${SCRIPTDIR}/certs/${ROOTCERT}" >> "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem" |
329acb58 | 235 | fi |
329acb58 LS |
236 | rm -f "${BASEDIR}/certs/${domain}/fullchain.pem" |
237 | ln -s "fullchain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/fullchain.pem" | |
238 | fi | |
239 | ||
f343dc11 LS |
240 | # Update remaining symlinks |
241 | if [ ! "${privkey}" = "privkey.pem" ]; then | |
242 | rm -f "${BASEDIR}/certs/${domain}/privkey.pem" | |
243 | ln -s "privkey-${timestamp}.pem" "${BASEDIR}/certs/${domain}/privkey.pem" | |
244 | fi | |
245 | ||
246 | rm -f "${BASEDIR}/certs/${domain}/cert.csr" | |
247 | ln -s "cert-${timestamp}.csr" "${BASEDIR}/certs/${domain}/cert.csr" | |
248 | ||
249 | rm -f "${BASEDIR}/certs/${domain}/cert.pem" | |
250 | ln -s "cert-${timestamp}.pem" "${BASEDIR}/certs/${domain}/cert.pem" | |
251 | ||
c24843c6 | 252 | # Wait for hook script to clean the challenge and to deploy cert if used |
253 | if [[ -n "${HOOK}" ]]; then | |
254 | ${HOOK} "deploy_cert" "${BASEDIR}/certs/${domain}/privkey.pem" "${BASEDIR}/certs/${domain}/cert.pem" "${BASEDIR}/certs/${domain}/fullchain.pem" | |
255 | fi | |
256 | ||
257 | unset challenge_token | |
579e2316 | 258 | echo " + Done!" |
61f0b7ed LS |
259 | } |
260 | ||
5a213f5f | 261 | # Check if private key exists, if it doesn't exist yet generate a new one (rsa key) |
8221727a | 262 | register="0" |
5b29db97 | 263 | if [[ ! -e "${BASEDIR}/private_key.pem" ]]; then |
f13eaa7f | 264 | echo "+ Generating account key..." |
5b29db97 | 265 | openssl genrsa -out "${BASEDIR}/private_key.pem" "${KEYSIZE}" 2> /dev/null > /dev/null |
8221727a LS |
266 | register="1" |
267 | fi | |
268 | ||
c6e60302 | 269 | # Get public components from private key and calculate thumbprint |
5b29db97 AJM |
270 | pubExponent64="$(printf "%06x" "$(openssl rsa -in "${BASEDIR}/private_key.pem" -noout -text | grep publicExponent | head -1 | cut -d' ' -f2)" | hex2bin | urlbase64)" |
271 | pubMod64="$(printf '%s' "$(openssl rsa -in "${BASEDIR}/private_key.pem" -noout -modulus | cut -d'=' -f2)" | hex2bin | urlbase64)" | |
8221727a | 272 | |
c6e60302 | 273 | thumbprint="$(printf '%s' "$(printf '%s' '{"e":"'"${pubExponent64}"'","kty":"RSA","n":"'"${pubMod64}"'"}' | shasum -a 256 | awk '{print $1}')" | hex2bin | urlbase64)" |
8221727a | 274 | |
c6e60302 | 275 | # If we generated a new private key in the step above we have to register it with the acme-server |
dd5f36e5 | 276 | if [[ "${register}" = "1" ]]; then |
f13eaa7f | 277 | echo "+ Registering account key with letsencrypt..." |
ea5b70a3 | 278 | # if an email for the contact has been provided then adding it to the registration request |
279 | if [ -n "${CONTACT_EMAIL}" ]; then | |
280 | signed_request "${CA}/acme/new-reg" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > /dev/null | |
281 | else | |
282 | signed_request "${CA}/acme/new-reg" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > /dev/null | |
283 | fi | |
f13eaa7f LS |
284 | fi |
285 | ||
1f08fda7 LS |
286 | if [[ -e "${BASEDIR}/domains.txt" ]]; then |
287 | DOMAINS_TXT="${BASEDIR}/domains.txt" | |
288 | elif [[ -e "${SCRIPTDIR}/domains.txt" ]]; then | |
289 | DOMAINS_TXT="${SCRIPTDIR}/domains.txt" | |
290 | else | |
440dc30d LS |
291 | echo "You have to create a domains.txt file listing the domains you want certificates for. Have a look at domains.txt.example." |
292 | exit 1 | |
293 | fi | |
294 | ||
3390080c LS |
295 | if [[ ! -e "${WELLKNOWN}" ]]; then |
296 | mkdir -p "${WELLKNOWN}" | |
297 | fi | |
298 | ||
063d28a6 MG |
299 | # revoke certificate by user request |
300 | if [[ "${1:-}" = "revoke" ]]; then | |
301 | if [[ -z "{2:-}" ]] || [[ ! -f "${2}" ]]; then | |
ead15632 | 302 | echo "Usage: ${0} revoke path/to/cert.pem" |
063d28a6 MG |
303 | exit 1 |
304 | fi | |
c24843c6 | 305 | |
063d28a6 MG |
306 | echo "Revoking ${2}" |
307 | revoke_cert "${2}" | |
308 | ||
309 | exit 0 | |
310 | fi | |
311 | ||
1f08fda7 LS |
312 | # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire |
313 | <"${DOMAINS_TXT}" sed 's/^\s*//g;s/\s*$//g' | grep -v '^#' | grep -v '^$' | while read -r line; do | |
219b3e9d | 314 | domain="$(echo "${line}" | cut -d' ' -f1)" |
5b29db97 | 315 | cert="${BASEDIR}/certs/${domain}/cert.pem" |
579e2316 MG |
316 | |
317 | echo "Processing ${domain}" | |
318 | if [[ -e "${cert}" ]]; then | |
319 | echo " + Found existing cert..." | |
320 | ||
321 | # Turning off exit on non-zero status for cert validation | |
219b3e9d | 322 | set +e; openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; expiring=$?; set -e |
5b29db97 | 323 | valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )" |
579e2316 MG |
324 | |
325 | echo -n " + Valid till ${valid} " | |
5060dea0 | 326 | if [[ ${expiring} -eq 0 ]]; then |
579e2316 MG |
327 | echo "(Longer than ${RENEW_DAYS} days). Skipping!" |
328 | continue | |
5060dea0 | 329 | fi |
579e2316 | 330 | echo "(Less than ${RENEW_DAYS} days). Renewing!" |
5060dea0 MG |
331 | fi |
332 | ||
219b3e9d | 333 | # shellcheck disable=SC2086 |
6221526d | 334 | sign_domain $line |
61f0b7ed | 335 | done |