131 lines
4.6 KiB
Bash
131 lines
4.6 KiB
Bash
#!/bin/bash
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# Return values / exit codes
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# 0 = cert created successfully
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# 1 = cert renewed successfully
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# 2 = cert not due for renewal
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# * = errors
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source /srv/functions.sh
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CERT_DOMAINS=(${DOMAINS[@]})
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CERT_DOMAIN=${CERT_DOMAINS[0]}
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ACME_BASE=/var/lib/acme
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TYPE=${1}
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PREFIX=""
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# only support rsa certificates for now
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if [[ "${TYPE}" != "rsa" ]]; then
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log_f "Unknown certificate type '${TYPE}' requested"
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exit 5
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fi
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DOMAINS_FILE=${ACME_BASE}/${CERT_DOMAIN}/domains
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CERT=${ACME_BASE}/${CERT_DOMAIN}/${PREFIX}cert.pem
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SHARED_KEY=${ACME_BASE}/acme/${PREFIX}key.pem # must already exist
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KEY=${ACME_BASE}/${CERT_DOMAIN}/${PREFIX}key.pem
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CSR=${ACME_BASE}/${CERT_DOMAIN}/${PREFIX}acme.csr
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if [[ -z ${CERT_DOMAINS[*]} ]]; then
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log_f "Missing CERT_DOMAINS to obtain a certificate"
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exit 3
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fi
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if [[ "${LE_STAGING}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then
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if [[ ! -z "${DIRECTORY_URL}" ]]; then
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log_f "Cannot use DIRECTORY_URL with LE_STAGING=y - ignoring DIRECTORY_URL"
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fi
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log_f "Using Let's Encrypt staging servers"
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DIRECTORY_URL='--directory-url https://acme-staging-v02.api.letsencrypt.org/directory'
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elif [[ ! -z "${DIRECTORY_URL}" ]]; then
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log_f "Using custom directory URL ${DIRECTORY_URL}"
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DIRECTORY_URL="--directory-url ${DIRECTORY_URL}"
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fi
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if [[ -f ${DOMAINS_FILE} && "$(cat ${DOMAINS_FILE})" == "${CERT_DOMAINS[*]}" ]]; then
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if [[ ! -f ${CERT} || ! -f "${KEY}" || -f "${ACME_BASE}/force_renew" ]]; then
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log_f "Certificate ${CERT} doesn't exist yet or forced renewal - start obtaining"
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# Certificate exists and did not change but could be due for renewal (30 days)
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elif ! openssl x509 -checkend 2592000 -noout -in ${CERT} > /dev/null; then
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log_f "Certificate ${CERT} is due for renewal (< 30 days) - start renewing"
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else
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log_f "Certificate ${CERT} validation done, neither changed nor due for renewal."
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exit 2
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fi
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else
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log_f "Certificate ${CERT} missing or changed domains '${CERT_DOMAINS[*]}' - start obtaining"
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fi
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# Make backup
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if [[ -f ${CERT} ]]; then
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DATE=$(date +%Y-%m-%d_%H_%M_%S)
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BACKUP_DIR=${ACME_BASE}/backups/${CERT_DOMAIN}/${PREFIX}${DATE}
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log_f "Creating backups in ${BACKUP_DIR} ..."
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mkdir -p ${BACKUP_DIR}/
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[[ -f ${DOMAINS_FILE} ]] && cp ${DOMAINS_FILE} ${BACKUP_DIR}/
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[[ -f ${CERT} ]] && cp ${CERT} ${BACKUP_DIR}/
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[[ -f ${KEY} ]] && cp ${KEY} ${BACKUP_DIR}/
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[[ -f ${CSR} ]] && cp ${CSR} ${BACKUP_DIR}/
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fi
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mkdir -p ${ACME_BASE}/${CERT_DOMAIN}
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if [[ ! -f ${KEY} ]]; then
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log_f "Copying shared private key for this certificate..."
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cp ${SHARED_KEY} ${KEY}
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chmod 600 ${KEY}
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fi
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# Generating CSR
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printf "[SAN]\nsubjectAltName=" > /tmp/_SAN
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printf "DNS:%s," "${CERT_DOMAINS[@]}" >> /tmp/_SAN
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sed -i '$s/,$//' /tmp/_SAN
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openssl req -new -sha256 -key ${KEY} -subj "/" -reqexts SAN -config <(cat "$(openssl version -d | sed 's/.*"\(.*\)"/\1/g')/openssl.cnf" /tmp/_SAN) > ${CSR}
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# acme-tiny writes info to stderr and ceritifcate to stdout
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# The redirects will do the following:
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# - redirect stdout to temp certificate file
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# - redirect acme-tiny stderr to stdout (logs to variable ACME_RESPONSE)
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# - tee stderr to get live output and log to dockerd
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log_f "Checking resolver..."
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until dig letsencrypt.org +time=3 +tries=1 @unbound > /dev/null; do
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sleep 2
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done
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log_f "Resolver OK"
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log_f "Using command acme-tiny ${DIRECTORY_URL} ${ACME_CONTACT_PARAMETER} --account-key ${ACME_BASE}/acme/account.pem --disable-check --csr ${CSR} --acme-dir /var/www/acme/"
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ACME_RESPONSE=$(acme-tiny ${DIRECTORY_URL} ${ACME_CONTACT_PARAMETER} \
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--account-key ${ACME_BASE}/acme/account.pem \
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--disable-check \
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--csr ${CSR} \
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--acme-dir /var/www/acme/ 2>&1 > /tmp/_cert.pem | tee /dev/fd/5; exit ${PIPESTATUS[0]})
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SUCCESS="$?"
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ACME_RESPONSE_B64=$(echo "${ACME_RESPONSE}" | openssl enc -e -A -base64)
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log_f "${ACME_RESPONSE_B64}" redis_only b64
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case "$SUCCESS" in
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0) # cert requested
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log_f "Deploying certificate ${CERT}..."
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# Deploy the new certificate and key
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# Moving temp cert to {domain} folder
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if verify_hash_match /tmp/_cert.pem ${KEY}; then
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RETURN=0 # certificate created
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if [[ -f ${CERT} ]]; then
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RETURN=1 # certificate renewed
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fi
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mv -f /tmp/_cert.pem ${CERT}
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echo -n ${CERT_DOMAINS[*]} > ${DOMAINS_FILE}
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rm /var/www/acme/* 2> /dev/null
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log_f "Certificate successfully obtained"
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exit ${RETURN}
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else
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log_f "Certificate was successfully requested, but key and certificate have non-matching hashes, ignoring certificate"
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exit 4
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fi
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;;
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*) # non-zero is non-fun
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log_f "Failed to obtain certificate ${CERT} for domains '${CERT_DOMAINS[*]}'"
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redis-cli -h redis SET ACME_FAIL_TIME "$(date +%s)"
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exit 100${SUCCESS}
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;;
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esac
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