set -u
set -o pipefail
-. ./config.sh
+# Get the directory in which this script is stored
+SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+# Default config values
+CA="https://acme-v01.api.letsencrypt.org"
+LICENSE="https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf"
+HOOK=
+RENEW_DAYS="14"
+KEYSIZE="4096"
+WELLKNOWN="${SCRIPTDIR}/.acme-challenges"
+PRIVATE_KEY_RENEW="no"
+BASEDIR="${SCRIPTDIR}"
+OPENSSL_CNF="$(openssl version -d | cut -d'"' -f2)/openssl.cnf"
+ROOTCERT="lets-encrypt-x1-cross-signed.pem"
+CONTACT_EMAIL=
+
+# Check for config in various locations
+CONFIG=""
+for check_config in "${SCRIPTDIR}" "${HOME}/.letsencrypt.sh" "/usr/local/etc/letsencrypt.sh" "/etc/letsencrypt.sh" "${PWD}"; do
+ if [[ -e "${check_config}/config.sh" ]]; then
+ BASEDIR="${check_config}"
+ CONFIG="${check_config}/config.sh"
+ break
+ fi
+done
+
+if [[ -z "${CONFIG}" ]]; then
+ echo "WARNING: No config file found, using default config!"
+ sleep 2
+else
+ echo "Using config file ${check_config}"
+ # shellcheck disable=SC1090
+ . "${CONFIG}"
+fi
+
+# Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality.
+BASEDIR="${BASEDIR%%/}"
umask 077 # paranoid umask, we're creating private keys
+# Export some environment variables to be used in hook script
+export WELLKNOWN
+export BASEDIR
+export CONFIG
+
anti_newline() {
tr -d '\n\r'
}
urlbase64() {
# urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_'
- openssl base64 -e | anti_newline | sed -r 's/=*$//g' | tr '+/' '-_'
+ openssl base64 -e | anti_newline | sed 's/=*$//g' | tr '+/' '-_'
}
hex2bin() {
done
# Convert to binary data
- printf "${escapedhex}"
+ printf -- "${escapedhex}"
}
_request() {
- temperr="$(mktemp)"
- if [ "${1}" = "head" ]; then
- curl -sSf -I "${2}" 2>"${temperr}"
- elif [ "${1}" = "get" ]; then
- curl -sSf "${2}" 2>"${temperr}"
- elif [ "${1}" = "post" ]; then
- curl -sSf "${2}" -d "${3}" 2>"${temperr}"
+ tempcont="$(mktemp)"
+
+ if [[ "${1}" = "head" ]]; then
+ statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)"
+ elif [[ "${1}" = "get" ]]; then
+ statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}")"
+ elif [[ "${1}" = "post" ]]; then
+ statuscode="$(curl -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")"
+ fi
+
+ if [[ ! "${statuscode:0:1}" = "2" ]]; then
+ echo " + ERROR: An error occured while sending ${1}-request to ${2} (Status ${statuscode})" >&2
+ echo >&2
+ echo "Details:" >&2
+ echo "$(<"${tempcont}"))" >&2
+ rm -f "${tempcont}"
+
+ # Wait for hook script to clean the challenge if used
+ if [[ -n "${HOOK}" ]]; then
+ ${HOOK} "clean_challenge" "${challenge_token}" "${keyauth}"
+ fi
+
+ exit 1
fi
- if [ ! -z "$(<${temperr})" ]; then echo " + ERROR: An error occured while sending ${1}-request to ${2} ($(<"${temperr}"))" >&2; exit 1; fi
- rm -f "${temperr}"
+
+ cat "${tempcont}"
+ rm -f "${tempcont}"
}
signed_request() {
protected64="$(printf '%s' "${protected}" | urlbase64)"
# Sign header with nonce and our payload with our private key and encode signature as urlbase64
- signed64="$(printf '%s' "${protected64}.${payload64}" | openssl dgst -sha256 -sign private_key.pem | urlbase64)"
+ signed64="$(printf '%s' "${protected64}.${payload64}" | openssl dgst -sha256 -sign "${BASEDIR}/private_key.pem" | urlbase64)"
# Send header + extended header + payload + signature to the acme-server
data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
_request post "${1}" "${data}"
}
+revoke_cert() {
+ cert="${1}"
+ cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)"
+ response="$(signed_request "${CA}/acme/revoke-cert" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}')"
+ # if there is a problem with our revoke request _request (via signed_request) will report this and "exit 1" out
+ # so if we are here, it is safe to assume the request was successful
+ echo " + SUCCESS"
+ echo " + renaming certificate to ${cert}-revoked"
+ mv -f "${cert}" "${cert}-revoked"
+}
+
sign_domain() {
domain="${1}"
altnames="${*}"
- echo "Signing domain ${1} (${*})..."
+ echo " + Signing domains..."
- # If there is no existing certificate directory we need a new private key
- if [ ! -e "certs/${domain}" ]; then
- mkdir "certs/${domain}"
- echo " + Generating private key..."
- openssl genrsa -out "certs/${domain}/privkey.pem" 4096 2> /dev/null > /dev/null
+ timestamp="$(date +%s)"
+
+ # If there is no existing certificate directory => make it
+ if [[ ! -e "${BASEDIR}/certs/${domain}" ]]; then
+ echo " + make directory ${BASEDIR}/certs/${domain} ..."
+ mkdir -p "${BASEDIR}/certs/${domain}"
+ fi
+
+ privkey="privkey.pem"
+ # generate a new private key if we need or want one
+ if [[ ! -f "${BASEDIR}/certs/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
+ echo " + Generating private key..."
+ privkey="privkey-${timestamp}.pem"
+ openssl genrsa -out "${BASEDIR}/certs/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}" 2> /dev/null > /dev/null
fi
# Generate signing request config and the actual signing request
for altname in $altnames; do
SAN+="DNS:${altname}, "
done
- SAN="$(printf '%s' "${SAN}" | sed 's/,\s*$//g')"
- echo " + Generating signing request..."
- openssl req -new -sha256 -key "certs/${domain}/privkey.pem" -out "certs/${domain}/cert.csr" -subj "/CN=${domain}/" -reqexts SAN -config <(cat /etc/ssl/openssl.cnf <(printf "[SAN]\nsubjectAltName=%s" "${SAN}")) > /dev/null
+ SAN="${SAN%%, }"
+ echo " + Generating signing request..."
+ 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
# Request and respond to challenges
for altname in $altnames; do
# Ask the acme-server for new challenge token and extract them from the resulting json block
- echo " + Requesting challenge for ${altname}..."
+ echo " + Requesting challenge for ${altname}..."
response="$(signed_request "${CA}/acme/new-authz" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}')"
- challenge_token="$(printf '%s\n' "${response}" | grep -Eo '"challenges":[^\[]*\[[^]]*]' | sed 's/{/\n{/g' | grep 'http-01' | grep -Eo '"token":\s*"[^"]*"' | cut -d'"' -f4 | sed 's/[^A-Za-z0-9_\-]/_/g')"
- challenge_uri="$(printf '%s\n' "${response}" | grep -Eo '"challenges":[^\[]*\[[^]]*]' | sed 's/{/\n{/g' | grep 'http-01' | grep -Eo '"uri":\s*"[^"]*"' | cut -d'"' -f4)"
+ challenges="$(printf '%s\n' "${response}" | grep -Eo '"challenges":[^\[]*\[[^]]*]')"
+ challenge="$(printf "%s" "${challenges//\{/$'\n'{}" | grep 'http-01')"
+ challenge_token="$(printf '%s' "${challenge}" | grep -Eo '"token":\s*"[^"]*"' | cut -d'"' -f4 | sed 's/[^A-Za-z0-9_\-]/_/g')"
+ challenge_uri="$(printf '%s' "${challenge}" | grep -Eo '"uri":\s*"[^"]*"' | cut -d'"' -f4)"
- if [ -z "${challenge_token}" ] || [ -z "${challenge_uri}" ]; then
+ if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then
echo " + Error: Can't retrieve challenges (${response})"
exit 1
fi
printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}"
chmod a+r "${WELLKNOWN}/${challenge_token}"
+ # Wait for hook script to deploy the challenge if used
+ if [[ -n "${HOOK}" ]]; then
+ ${HOOK} "deploy_challenge" "${challenge_token}" "${keyauth}"
+ fi
+
# Ask the acme-server to verify our challenge and wait until it becomes valid
- echo " + Responding to challenge for ${altname}..."
+ echo " + Responding to challenge for ${altname}..."
result="$(signed_request "${challenge_uri}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}')"
status="$(printf '%s\n' "${result}" | grep -Eo '"status":\s*"[^"]*"' | cut -d'"' -f4)"
- if [ ! "${status}" = "pending" ] && [ ! "${status}" = "valid" ]; then
- echo " + Challenge is invalid! (${result})"
- exit 1
- fi
- while [ "${status}" = "pending" ]; do
- status="$(_request get "${challenge_uri}" | grep -Eo '"status":\s*"[^"]*"' | cut -d'"' -f4)"
+ # get status until a result is reached => not pending anymore
+ while [[ "${status}" = "pending" ]]; do
sleep 1
+ status="$(_request get "${challenge_uri}" | grep -Eo '"status":\s*"[^"]*"' | cut -d'"' -f4)"
done
- echo " + Challenge is valid!"
+ rm -f "${WELLKNOWN}/${challenge_token}"
+
+ if [[ "${status}" = "valid" ]]; then
+ echo " + Challenge is valid!"
+ else
+ echo " + Challenge is invalid! (returned: ${status})"
+
+ # Wait for hook script to clean the challenge if used
+ if [[ -n "${HOOK}" ]] && [[ -n "${challenge_token}" ]]; then
+ ${HOOK} "clean_challenge" "${challenge_token}" "${keyauth}"
+ fi
+
+ exit 1
+ fi
+
done
- # Finally request certificate from the acme-server and store it in cert.pem
- echo " + Requesting certificate..."
- csr64="$(openssl req -in "certs/${domain}/cert.csr" -outform DER | urlbase64)"
+ # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem
+ echo " + Requesting certificate..."
+ csr64="$(openssl req -in "${BASEDIR}/certs/${domain}/cert-${timestamp}.csr" -outform DER | urlbase64)"
crt64="$(signed_request "${CA}/acme/new-cert" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)"
- printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" > "certs/${domain}/cert.pem"
- echo " + Done!"
+ printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" > "${BASEDIR}/certs/${domain}/cert-${timestamp}.pem"
+
+ # Create fullchain.pem
+ if [[ -e "${BASEDIR}/certs/${ROOTCERT}" ]] || [[ -e "${SCRIPTDIR}/certs/${ROOTCERT}" ]]; then
+ echo " + Creating fullchain.pem..."
+ cat "${BASEDIR}/certs/${domain}/cert-${timestamp}.pem" > "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
+ if [[ -e "${BASEDIR}/certs/${ROOTCERT}" ]]; then
+ cat "${BASEDIR}/certs/${ROOTCERT}" >> "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
+ else
+ cat "${SCRIPTDIR}/certs/${ROOTCERT}" >> "${BASEDIR}/certs/${domain}/fullchain-${timestamp}.pem"
+ fi
+ ln -sf "fullchain-${timestamp}.pem" "${BASEDIR}/certs/${domain}/fullchain.pem"
+ fi
+
+ # Update remaining symlinks
+ if [ ! "${privkey}" = "privkey.pem" ]; then
+ ln -sf "privkey-${timestamp}.pem" "${BASEDIR}/certs/${domain}/privkey.pem"
+ fi
+
+ ln -sf "cert-${timestamp}.csr" "${BASEDIR}/certs/${domain}/cert.csr"
+ ln -sf "cert-${timestamp}.pem" "${BASEDIR}/certs/${domain}/cert.pem"
+
+ # Wait for hook script to clean the challenge and to deploy cert if used
+ if [[ -n "${HOOK}" ]]; then
+ ${HOOK} "deploy_cert" "${BASEDIR}/certs/${domain}/privkey.pem" "${BASEDIR}/certs/${domain}/cert.pem" "${BASEDIR}/certs/${domain}/fullchain.pem"
+ fi
+
+ unset challenge_token
+ echo " + Done!"
}
-# Check if private key exists, if it doesn't exist yet generate a new one (4096bit rsa key)
+# Check if private key exists, if it doesn't exist yet generate a new one (rsa key)
register="0"
-if [ ! -e "private_key.pem" ]; then
+if [[ ! -e "${BASEDIR}/private_key.pem" ]]; then
echo "+ Generating account key..."
- openssl genrsa -out "private_key.pem" 4096 2> /dev/null > /dev/null
+ openssl genrsa -out "${BASEDIR}/private_key.pem" "${KEYSIZE}" 2> /dev/null > /dev/null
register="1"
fi
# Get public components from private key and calculate thumbprint
-pubExponent64="$(printf "%06x" "$(openssl rsa -in private_key.pem -noout -text | grep publicExponent | head -1 | cut -d' ' -f2)" | hex2bin | urlbase64)"
-pubMod64="$(printf '%s' "$(openssl rsa -in private_key.pem -noout -modulus | cut -d'=' -f2)" | hex2bin | urlbase64)"
+pubExponent64="$(printf "%06x" "$(openssl rsa -in "${BASEDIR}/private_key.pem" -noout -text | grep publicExponent | head -1 | cut -d' ' -f2)" | hex2bin | urlbase64)"
+pubMod64="$(printf '%s' "$(openssl rsa -in "${BASEDIR}/private_key.pem" -noout -modulus | cut -d'=' -f2)" | hex2bin | urlbase64)"
thumbprint="$(printf '%s' "$(printf '%s' '{"e":"'"${pubExponent64}"'","kty":"RSA","n":"'"${pubMod64}"'"}' | shasum -a 256 | awk '{print $1}')" | hex2bin | urlbase64)"
# If we generated a new private key in the step above we have to register it with the acme-server
-if [ "${register}" = "1" ]; then
+if [[ "${register}" = "1" ]]; then
echo "+ Registering account key with letsencrypt..."
- signed_request "${CA}/acme/new-reg" '{"resource": "new-reg", "agreement": "https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf"}' > /dev/null
+ # if an email for the contact has been provided then adding it to the registration request
+ if [ -n "${CONTACT_EMAIL}" ]; then
+ signed_request "${CA}/acme/new-reg" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > /dev/null
+ else
+ signed_request "${CA}/acme/new-reg" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > /dev/null
+ fi
+fi
+
+if [[ -e "${BASEDIR}/domains.txt" ]]; then
+ DOMAINS_TXT="${BASEDIR}/domains.txt"
+elif [[ -e "${SCRIPTDIR}/domains.txt" ]]; then
+ DOMAINS_TXT="${SCRIPTDIR}/domains.txt"
+else
+ echo "You have to create a domains.txt file listing the domains you want certificates for. Have a look at domains.txt.example."
+ exit 1
fi
-# Generate certificates for all domains found in domain.txt (TODO: check if certificate already exists and is about to expire)
-<domains.txt sed 's/^\s*//g;s/\s*$//g' | grep -v '^#' | grep -v '^$' | while read line; do
+if [[ ! -e "${WELLKNOWN}" ]]; then
+ mkdir -p "${WELLKNOWN}"
+fi
+
+# revoke certificate by user request
+if [[ "${1:-}" = "revoke" ]]; then
+ if [[ -z "{2:-}" ]] || [[ ! -f "${2}" ]]; then
+ echo "Usage: ${0} revoke path/to/cert.pem"
+ exit 1
+ fi
+
+ echo "Revoking ${2}"
+ revoke_cert "${2}"
+
+ exit 0
+fi
+
+# Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire
+<"${DOMAINS_TXT}" sed 's/^\s*//g;s/\s*$//g' | grep -v '^#' | grep -v '^$' | while read -r line; do
+ domain="$(echo "${line}" | cut -d' ' -f1)"
+ cert="${BASEDIR}/certs/${domain}/cert.pem"
+
+ echo "Processing ${domain}"
+ if [[ -e "${cert}" ]]; then
+ echo " + Found existing cert..."
+
+ valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )"
+
+ echo -n " + Valid till ${valid} "
+ if openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; then
+ echo "(Longer than ${RENEW_DAYS} days). Skipping!"
+ continue
+ fi
+ echo "(Less than ${RENEW_DAYS} days). Renewing!"
+ fi
+
+ # shellcheck disable=SC2086
sign_domain $line
done
projects / andy / dehydrated.git / blobdiff