certs: Add support for an ACME certificate provider

Add a service which will acquire certificates from an ACME cert
provider, such as LetsEncrypt (), to allow an openBalena instance
to use a publicly trusted certificate instead of the self-signed
one it wil generate on setup.

Change-type: patch
Signed-off-by: Rich Bayliss <rich@balena.io>

cert-provider/Dockerfile

@@ -0,0 +1,20 @@
+FROM alpine
+
+EXPOSE 80
+WORKDIR /usr/src/app
+VOLUME [ "/usr/src/app/certs" ]
+
+RUN apk add --update bash curl git openssl ncurses socat
+
+RUN git clone https://github.com/Neilpang/acme.sh.git && \
+    cd acme.sh && \
+    git checkout 08357e3cb0d80c84bdaf3e42ce0e439665387f57 . && \
+    ./acme.sh --install  \
+    --cert-home /usr/src/app/certs
+
+COPY entry.sh /entry.sh
+COPY cert-provider.sh ./cert-provider.sh
+COPY fake-le-bundle.pem ./
+
+ENTRYPOINT [ "/entry.sh" ]
+CMD [ "/usr/src/app/cert-provider.sh" ]

cert-provider/cert-provider.sh

@@ -0,0 +1,181 @@
+#!/bin/bash
+
+# the acme.sh client script, installed via Git in the Dockerfile...
+ACME_BIN="$(realpath ~/.acme.sh/acme.sh)"
+
+# the path to a bundle of certs to verify a LetsEncrypt staging certificate until Apr 2036...
+ACME_STAGING_CA="/usr/src/app/fake-le-bundle.pem"
+
+# the path to a file which stores the last successful mode of certificate we acquired...
+ACME_MODE_FILE="/usr/src/app/certs/last_run_mode"
+
+# colour output helpers...
+reset=$(tput -T xterm sgr0)
+red=$(tput -T xterm setaf 1)
+green=$(tput -T xterm setaf 2)
+yellow=$(tput -T xterm setaf 3)
+blue=$(tput -T xterm setaf 4)
+
+logError() {
+    echo "${red}[Error]${reset} $1"
+}
+
+logWarn() {
+    echo "${yellow}[Warn]${reset} $1"
+}
+
+logInfo() {
+    echo "${blue}[Info]${reset} $1"
+}
+
+logSuccess() {
+    echo "${green}[Success]${reset} $1"
+}
+
+logErrorAndStop() {
+    logError "$1 [Stopping]"
+    while true; do
+        # do nothing forever...
+        sleep 60
+    done
+}
+
+retryWithDelay() {
+    RETRIES=${2:-3}
+    DELAY=${3:-5}
+
+    local ATTEMPT=0
+    while [ $RETRIES -gt $ATTEMPT ]; do
+        let "ATTEMPT++"
+        if $1; then
+            return $?
+        fi
+
+        echo "($ATTEMPT/$RETRIES) Retrying in ${DELAY} seconds..."
+        sleep $DELAY
+    done
+
+    return 1
+}
+
+waitForOnline() {
+    ADDRESS="${1,,}"
+
+    logInfo "Waiting for ${ADDRESS} to be available via HTTP..."
+    retryWithDelay "curl --output /dev/null --silent --head --fail http://${ADDRESS}" 6 5
+}
+
+isUsingStagingCert() {
+    HOST="${1,,}"
+    echo "" | openssl s_client -host "$HOST" -port 443 -showcerts 2>/dev/null | awk '/BEGIN CERT/ {p=1} ; p==1; /END CERT/ {p=0}' | openssl verify -CAfile "$ACME_STAGING_CA" > /dev/null 2>&1
+}
+
+pre-flight() {
+    case "$ACTIVE" in
+        "true"|"yes")
+            ;;
+        *)
+            logError "ACTIVE variable is not enabled. Value should be \"true\" or \"yes\" to continue."
+            return 1
+            ;;
+    esac
+
+    if [ -z "$DOMAINS" ]; then
+        logError "DOMAINS must be set. Value should be a comma-delimited string of domains."
+        return 1
+    else
+        IFS=, read -r -a ACME_DOMAINS <<< "$DOMAINS"
+        IFS=' ' read -r -a ACME_DOMAIN_ARGS <<< "${ACME_DOMAINS[@]/#/-d }"
+    fi
+
+    if [ -z "$VALIDATION" ]; then
+        logInfo "VALIDATION not set. Using default: http-01"
+        VALIDATION="http-01"
+    else
+        case "$VALIDATION" in
+            "http-01")
+                logInfo "Using validation method: $VALIDATION"
+                ;;
+            *)
+                logError "VALIDATION is invalid. Use a valid value: http-01"
+                return 1
+                ;;
+        esac
+    fi
+
+    if [ -z "$OUTPUT_PEM" ]; then
+        logError "OUTPUT_PEM must be set. Value should be the path to install your certificate to."
+        return 1
+    fi
+}
+
+waitToSeeStagingCert() {
+    logInfo "Waiting for ${ACME_DOMAINS[0]} to use a staging certificate..."
+    retryWithDelay "isUsingStagingCert ${ACME_DOMAINS[0]}" 3 5
+}
+
+lastAcquiredCertFor() {
+    ACME_MODE="${1:-none}"
+    ACME_LAST_MODE="$(cat $ACME_MODE_FILE || echo '')"
+    logInfo "Last acquired certificate for ${ACME_LAST_MODE^^}"
+    [ "${ACME_LAST_MODE,,}" == "${ACME_MODE,,}" ]
+}
+
+acquireCertificate() {
+    ACME_MODE="${1:-staging}"
+    ACME_FORCE="${2:-false}"
+    ACME_OPTS=()
+
+    if [ "${ACME_FORCE,,}" == "true" ];then ACME_OPTS+=("--force"); fi
+    case "$ACME_MODE" in
+        "production")
+            logInfo "Using PRODUCTION mode"
+            ;;
+        *)
+            logInfo "Using STAGING mode"
+            ACME_OPTS+=("--staging")
+            ;;
+    esac
+
+    case "$VALIDATION" in
+        "http-01")
+            ACME_OPTS+=("--standalone")
+            ;;
+        *)
+            logError "VALIDATION is invalid. Use a valid value: http-01"
+            return 1
+            ;;
+    esac
+
+    if ! waitForOnline "${ACME_DOMAINS[0]}"; then
+        logError "Unable to access site over HTTP"
+        return 1
+    fi
+
+    logInfo "Issuing certificates..."
+    "$ACME_BIN" --issue "${ACME_OPTS[@]}" "${ACME_DOMAIN_ARGS[@]}"
+
+    logInfo "Installing certificates..." && \
+    "$ACME_BIN" --install-cert "${ACME_DOMAIN_ARGS[@]}" \
+    --cert-file      /tmp/cert.pem  \
+    --key-file       /tmp/key.pem  \
+    --fullchain-file /tmp/fullchain.pem \
+    --reloadcmd     "cat /tmp/fullchain.pem /tmp/key.pem > $OUTPUT_PEM" && \
+
+    echo "${ACME_MODE}" > "${ACME_MODE_FILE}"
+}
+
+pre-flight || logErrorAndStop "Unable to continue due to misconfiguration. See errors above."
+
+waitForOnline "${ACME_DOMAINS[0]}" || logErrorAndStop "Unable to access ${ACME_DOMAINS[0]} on port 80. This is needed for certificate validation."
+
+if ! lastAcquiredCertFor "production"; then
+    acquireCertificate "staging" || logErrorAndStop "Unable to acquire a staging certificate."
+    waitToSeeStagingCert || logErrorAndStop "Unable to detect certificate change over. Cannot issue a production certificate."
+    acquireCertificate "production" "true" || logErrorAndStop "Unable to acquire a production certificate."
+fi
+
+logSuccess "Done!"
+
+logInfo "Running cron..."
+crond -f -d 7

cert-provider/entry.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+exec "$@"

cert-provider/fake-le-bundle.pem

@@ -0,0 +1,56 @@
+-----BEGIN CERTIFICATE-----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+Kk055nJLMV9yPUdig8othUKrRfSxli946AEV1eEOhxddfEwBE3Lt2xn0hhiIedbb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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----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+SVuvdDM5zGv2f9ltNWUiYZHJ1mmO97jSY/6YfdOUH66iRtQtDkHBRdkNBsMbD+Em
+2TgBldtHNSJBfB3pm9FblgOcJ0FSWcUDWJ7vO0+NTXlgrRofRT6pVywzxVo6dND0
+WzYlTWeUVsO40xJqhgUQRER9YLOLxJ0O6C8i0xFxAMKOtSdodMB3RIwt7RFQ0uyt
+n5Z5MqkYhlMI3J1tPRTp1nEt9fyGspBOO05gi148Qasp+3N+svqKomoQglNoAxU=
+-----END CERTIFICATE-----

compose/services.yml

@@ -1,10 +1,12 @@
-version: '2.1'
+version: "2.1"
 
 volumes:
-  db:
+  certs: {}
-  registry:
+  cert-provider: {}
-  s3:
+  db: {}
-  redis:
+  redis: {}
+  registry: {}
+  s3: {}
 
 services:
   api:
@@ -20,7 +22,7 @@ services:
       API_VPN_SERVICE_API_KEY: ${OPENBALENA_API_VPN_SERVICE_API_KEY}
       BALENA_ROOT_CA: ${OPENBALENA_ROOT_CA}
       COOKIE_SESSION_SECRET: ${OPENBALENA_COOKIE_SESSION_SECRET}
-      DB_HOST: db.${OPENBALENA_HOST_NAME}
+      DB_HOST: db
       DB_PASSWORD: docker
       DB_PORT: 5432
       DB_USER: docker
@@ -36,10 +38,10 @@ services:
       JSON_WEB_TOKEN_EXPIRY_MINUTES: 10080
       JSON_WEB_TOKEN_SECRET: ${OPENBALENA_JWT_SECRET}
       MIXPANEL_TOKEN: __unused__
-      PRODUCTION_MODE: '${OPENBALENA_PRODUCTION_MODE}'
+      PRODUCTION_MODE: "${OPENBALENA_PRODUCTION_MODE}"
       PUBNUB_PUBLISH_KEY: __unused__
       PUBNUB_SUBSCRIBE_KEY: __unused__
-      REDIS_HOST: redis.${OPENBALENA_HOST_NAME}
+      REDIS_HOST: redis
       REDIS_PORT: 6379
       REGISTRY2_HOST: registry.${OPENBALENA_HOST_NAME}
       REGISTRY_HOST: registry.${OPENBALENA_HOST_NAME}
@@ -49,7 +51,7 @@ services:
       TOKEN_AUTH_CERT_KEY: ${OPENBALENA_TOKEN_AUTH_KEY}
       TOKEN_AUTH_CERT_KID: ${OPENBALENA_TOKEN_AUTH_KID}
       TOKEN_AUTH_CERT_PUB: ${OPENBALENA_TOKEN_AUTH_PUB}
-      TOKEN_AUTH_JWT_ALGO: 'ES256'
+      TOKEN_AUTH_JWT_ALGO: "ES256"
       VPN_HOST: vpn.${OPENBALENA_HOST_NAME}
       VPN_PORT: 443
       VPN_SERVICE_API_KEY: ${OPENBALENA_VPN_SERVICE_API_KEY}
@@ -73,10 +75,10 @@ services:
       BALENA_ROOT_CA: ${OPENBALENA_ROOT_CA}
       BALENA_TOKEN_AUTH_ISSUER: api.${OPENBALENA_HOST_NAME}
       BALENA_TOKEN_AUTH_REALM: https://api.${OPENBALENA_HOST_NAME}/auth/v1/token
-      COMMON_REGION: 
+      COMMON_REGION:
-      REGISTRY2_S3_BUCKET: 
+      REGISTRY2_S3_BUCKET:
-      REGISTRY2_S3_KEY: 
+      REGISTRY2_S3_KEY:
-      REGISTRY2_S3_SECRET: 
+      REGISTRY2_S3_SECRET:
       REGISTRY2_SECRETKEY: ${OPENBALENA_REGISTRY_SECRET_KEY}
       REGISTRY2_STORAGEPATH: /data
 
@@ -94,10 +96,10 @@ services:
       BALENA_API_HOST: api.${OPENBALENA_HOST_NAME}
       BALENA_ROOT_CA: ${OPENBALENA_ROOT_CA}
       BALENA_VPN_PORT: 443
-      PRODUCTION_MODE: '${OPENBALENA_PRODUCTION_MODE}'
+      PRODUCTION_MODE: "${OPENBALENA_PRODUCTION_MODE}"
       RESIN_VPN_GATEWAY: 10.2.0.1
-      SENTRY_DSN: 
+      SENTRY_DSN:
-      VPN_HAPROXY_USEPROXYPROTOCOL: 'true'
+      VPN_HAPROXY_USEPROXYPROTOCOL: "true"
       VPN_OPENVPN_CA_CRT: ${OPENBALENA_VPN_CA}
       VPN_OPENVPN_SERVER_CRT: ${OPENBALENA_VPN_SERVER_CRT}
       VPN_OPENVPN_SERVER_DH: ${OPENBALENA_VPN_SERVER_DH}
@@ -135,11 +137,12 @@ services:
     build: ../haproxy
     depends_on:
       - api
-      - registry
+      - cert-provider
-      - vpn
       - db
       - s3
       - redis
+      - registry
+      - vpn
     ports:
       - "80:80"
       - "443:443"
@@ -162,3 +165,15 @@ services:
       BALENA_HAPROXY_KEY: ${OPENBALENA_ROOT_KEY}
       BALENA_ROOT_CA: ${OPENBALENA_ROOT_CA}
       HAPROXY_HOSTNAME: ${OPENBALENA_HOST_NAME}
+    volumes:
+      - certs:/certs:ro
+
+  cert-provider:
+    build: ../cert-provider
+    volumes:
+      - certs:/certs
+      - cert-provider:/usr/src/app/certs
+    environment:
+      ACTIVE: ${OPENBALENA_ACME_CERT_ENABLED}
+      DOMAINS: "api.${OPENBALENA_HOST_NAME},registry.${OPENBALENA_HOST_NAME},s3.${OPENBALENA_HOST_NAME},vpn.${OPENBALENA_HOST_NAME}"
+      OUTPUT_PEM: /certs/open-balena.pem

haproxy/Dockerfile

@@ -1,6 +1,10 @@
-FROM haproxy:1.8-alpine
+FROM haproxy:1.9-alpine
+
+VOLUME [ "/certs" ]
+
+RUN apk add --update inotify-tools
 
 COPY haproxy.cfg /usr/local/etc/haproxy/haproxy.cfg
-COPY entry.sh /open-balena-entry
+COPY start-haproxy.sh /start-haproxy
 
-CMD /open-balena-entry
+CMD /start-haproxy

haproxy/entry.sh

@@ -1,11 +0,0 @@
-#!/bin/sh
-set -e
-
-HAPROXY_CHAIN=/etc/ssl/private/open-balena.pem
-mkdir -p "$(dirname "${HAPROXY_CHAIN}")"
-(
-    echo "${BALENA_HAPROXY_CRT}" | base64 -d
-    echo "${BALENA_HAPROXY_KEY}" | base64 -d
-    echo "${BALENA_ROOT_CA}" | base64 -d
-) > "${HAPROXY_CHAIN}"
-exec haproxy -f /usr/local/etc/haproxy/haproxy.cfg

haproxy/haproxy.cfg

@@ -12,6 +12,9 @@ frontend http-in
   bind *:80
   reqadd X-Forwarded-Proto:\ http
 
+  acl is_cert_validation path -i -m beg "/.well-known/acme-challenge/"
+  use_backend cert-provider if is_cert_validation
+
   acl host_api hdr_dom(host) -i "api.${HAPROXY_HOSTNAME}"
   use_backend backend_api if host_api
 
@@ -80,6 +83,12 @@ backend backend_s3
   option forwardfor
   balance roundrobin
 
+backend cert-provider
+  mode http
+  option forwardfor
+  balance roundrobin
+  server resin_cert-provider_1 cert-provider:80 no-check
+
 backend vpn-devices
   mode tcp
   server resin_vpn_1 vpn:443 send-proxy-v2 check-send-proxy port 443

haproxy/start-haproxy.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+OPENBALENA_CERT=/etc/ssl/private/open-balena.pem
+mkdir -p "$(dirname "${OPENBALENA_CERT}")"
+
+if [ -f "/certs/open-balena.pem" ]; then
+    echo "Using certificate from cert-provider..."
+    cp /certs/open-balena.pem "${OPENBALENA_CERT}"
+else
+    echo "Building certificate from environment variables..."
+    (
+        echo "${BALENA_HAPROXY_CRT}" | base64 -d
+        echo "${BALENA_HAPROXY_KEY}" | base64 -d
+        echo "${BALENA_ROOT_CA}" | base64 -d
+    ) > "${OPENBALENA_CERT}"
+fi
+
+haproxy -f /usr/local/etc/haproxy/haproxy.cfg -W &
+HAPROXY_PID=$!
+
+while true; do
+    inotifywait -r -e create -e modify -e delete /certs
+    
+    if [ -f "/certs/open-balena.pem" ]; then
+        echo "Updating certificate from cert-provider..."
+        cp /certs/open-balena.pem "${OPENBALENA_CERT}"
+    fi
+    
+    echo "Certificate change detected. Reloading..."
+    kill -SIGUSR2 $HAPROXY_PID
+    sleep 1;
+done

scripts/make-env

@@ -94,4 +94,5 @@ export OPENBALENA_REGISTRY_SECRET_KEY=$(randstr 32)
 export OPENBALENA_SSH_AUTHORIZED_KEYS=
 export OPENBALENA_SUPERUSER_EMAIL=$SUPERUSER_EMAIL
 export OPENBALENA_SUPERUSER_PASSWORD=$(printf "%q" "${SUPERUSER_PASSWORD}")
+export OPENBALENA_ACME_CERT_ENABLED=${ACME_CERT_ENABLED:-false}
 STR

scripts/quickstart

@@ -21,6 +21,10 @@ fi
 
 source "${BASH_SOURCE%/*}/_realpath"
 
+domainResolves() {
+  getent hosts "$1" > /dev/null 2>&1
+}
+
 CMD="$(realpath "$0")"
 DIR="$(dirname "${CMD}")"
 BASE_DIR="$(dirname "${DIR}")"
@@ -30,8 +34,9 @@ CERTS_DIR="${CONFIG_DIR}/certs"
 DOMAIN=openbalena.local
 
 usage() {
-  echo "usage: $0 [-h] [-p] [-d DOMAIN] -U EMAIL -P PASSWORD"
+  echo "usage: $0 [-c] [-h] [-p] [-d DOMAIN] -U EMAIL -P PASSWORD"
   echo
+  echo "  -c           enable the ACME certificate service in staging or production mode."
   echo "  -p           patch hosts - patch the host /etc/hosts file"
   echo "  -d DOMAIN    the domain name this deployment will run as, eg. example.com. Default is 'openbalena.local'"
   echo "  -U EMAIL     the email address of the superuser account, used to login to your install from the Balena CLI"
@@ -41,7 +46,7 @@ usage() {
 
 show_help=false
 patch_hosts=false
-while getopts ":hpxd:U:P:" opt; do
+while getopts ":chpxd:U:P:" opt; do
   case "${opt}" in
     h) show_help=true;;
     p) patch_hosts=true;;
@@ -49,6 +54,7 @@ while getopts ":hpxd:U:P:" opt; do
     d) DOMAIN="${OPTARG}";;
     U) SUPERUSER_EMAIL="${OPTARG}";;
     P) SUPERUSER_PASSWORD="${OPTARG}";;
+    c) ACME_CERT_ENABLED="true";;
     *)
       echo "Invalid argument: -${OPTARG}"
       usage
@@ -68,8 +74,17 @@ if [ "$show_help" = "true" ]; then
   exit 1
 fi
 
+if [ ! -z "$ACME_CERT_ENABLED" ]; then
+  echo "${BLUE}[INFO]${RESET} ACME Certificate request is ${BOLD}ENABLED${RESET}."
+  
+  if ! domainResolves "api.${DOMAIN}"; then
+    echo "${YELLOW}[WARN]${RESET} Unable to resolve \"api.${DOMAIN}\"!"
+    echo "${YELLOW}[WARN]${RESET} This might mean that you cannot use an ACME issued certificate."
+  fi
+fi
+
 echo_bold() {
-  printf "\\033[1m%s\\033[0m\\n" "${@}"
+  echo "${BOLD}${@}${RESET}"
 }
 
 echo_bold "==> Creating new configuration at: $CONFIG_DIR"
@@ -110,5 +125,7 @@ fi
 echo_bold "==> Success!"
 echo '  - Start the instance with: ./scripts/compose up -d'
 echo '  - Stop the instance with: ./scripts/compose stop'
-echo '  - To create the superuser, see: ./scripts/create-superuser -h'
+
-echo "  - Use the following certificate with Balena CLI: ${CERTS_DIR}/root/ca.crt"
+if [ -z "${ACME_CERT_ENABLED}" ]; then
+  echo "  - Use the following certificate with Balena CLI: ${CERTS_DIR}/root/ca.crt"
+fi