From: Lukas Schauer <lukas@schauer.so>
Date: Tue, 13 Sep 2016 17:57:14 +0000 (+0200)
Subject: fixed a few things after project rename
X-Git-Url: https://git.street.me.uk/andy/dehydrated.git/commitdiff_plain/ec49a4433b48a7bc8f178d06dad3f55cff24bdf3

fixed a few things after project rename
---

diff --git a/CHANGELOG b/CHANGELOG
index 00bef9d..1273cf7 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,5 @@
 # Change Log
-This file contains a log of major changes in dehydrated.sh
+This file contains a log of major changes in dehydrated
 
 ## [x.x.x] - xxxx-xx-xx
 ## Changed
@@ -7,7 +7,7 @@ This file contains a log of major changes in dehydrated.sh
 
 ## [0.3.1] - 2016-09-13
 ## Changed
-- Renamed project to `dehydrated` and main script to `dehydrated.sh`.
+- Renamed project to `dehydrated`.
 - Default WELLKNOWN location is now `/var/www/dehydrated`
 - Config location is renamed to `dehydrated` (e.g. `/etc/dehydrated`)
 
diff --git a/README.md b/README.md
index 6c17b7d..227274d 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ If you have any problems take a look at our [Troubleshooting](docs/troubleshooti
 ## Usage:
 
 ```text
-Usage: ./dehydrated.sh [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...
+Usage: ./dehydrated [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...
 
 Default command: help
 
diff --git a/dehydrated b/dehydrated
new file mode 100755
index 0000000..4cc2a66
--- /dev/null
+++ b/dehydrated
@@ -0,0 +1,1116 @@
+#!/usr/bin/env bash
+
+# dehydrated by lukas2511
+# Source: https://github.com/lukas2511/dehydrated
+#
+# This script is licensed under The MIT License (see LICENSE for more information).
+
+set -e
+set -u
+set -o pipefail
+[[ -n "${ZSH_VERSION:-}" ]] && set -o SH_WORD_SPLIT && set +o FUNCTION_ARGZERO
+umask 077 # paranoid umask, we're creating private keys
+
+# Find directory in which this script is stored by traversing all symbolic links
+SOURCE="${0}"
+while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
+  DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
+  SOURCE="$(readlink "$SOURCE")"
+  [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
+done
+SCRIPTDIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
+
+BASEDIR="${SCRIPTDIR}"
+
+# Create (identifiable) temporary files
+_mktemp() {
+  # shellcheck disable=SC2068
+  mktemp ${@:-} "${TMPDIR:-/tmp}/dehydrated-XXXXXX"
+}
+
+# Check for script dependencies
+check_dependencies() {
+  # just execute some dummy and/or version commands to see if required tools exist and are actually usable
+  openssl version > /dev/null 2>&1 || _exiterr "This script requires an openssl binary."
+  _sed "" < /dev/null > /dev/null 2>&1 || _exiterr "This script requires sed with support for extended (modern) regular expressions."
+  command -v grep > /dev/null 2>&1 || _exiterr "This script requires grep."
+  _mktemp -u > /dev/null 2>&1 || _exiterr "This script requires mktemp."
+  diff -u /dev/null /dev/null || _exiterr "This script requires diff."
+
+  # curl returns with an error code in some ancient versions so we have to catch that
+  set +e
+  curl -V > /dev/null 2>&1
+  retcode="$?"
+  set -e
+  if [[ ! "${retcode}" = "0" ]] && [[ ! "${retcode}" = "2" ]]; then
+    _exiterr "This script requires curl."
+  fi
+}
+
+store_configvars() {
+  __KEY_ALGO="${KEY_ALGO}"
+  __OCSP_MUST_STAPLE="${OCSP_MUST_STAPLE}"
+  __PRIVATE_KEY_RENEW="${PRIVATE_KEY_RENEW}"
+  __KEYSIZE="${KEYSIZE}"
+  __CHALLENGETYPE="${CHALLENGETYPE}"
+  __HOOK="${HOOK}"
+  __WELLKNOWN="${WELLKNOWN}"
+  __HOOK_CHAIN="${HOOK_CHAIN}"
+  __OPENSSL_CNF="${OPENSSL_CNF}"
+  __RENEW_DAYS="${RENEW_DAYS}"
+  __IP_VERSION="${IP_VERSION}"
+}
+
+reset_configvars() {
+  KEY_ALGO="${__KEY_ALGO}"
+  OCSP_MUST_STAPLE="${__OCSP_MUST_STAPLE}"
+  PRIVATE_KEY_RENEW="${__PRIVATE_KEY_RENEW}"
+  KEYSIZE="${__KEYSIZE}"
+  CHALLENGETYPE="${__CHALLENGETYPE}"
+  HOOK="${__HOOK}"
+  WELLKNOWN="${__WELLKNOWN}"
+  HOOK_CHAIN="${__HOOK_CHAIN}"
+  OPENSSL_CNF="${__OPENSSL_CNF}"
+  RENEW_DAYS="${__RENEW_DAYS}"
+  IP_VERSION="${__IP_VERSION}"
+}
+
+# verify configuration values
+verify_config() {
+  [[ "${CHALLENGETYPE}" =~ (http-01|dns-01) ]] || _exiterr "Unknown challenge type ${CHALLENGETYPE}... can not continue."
+  if [[ "${CHALLENGETYPE}" = "dns-01" ]] && [[ -z "${HOOK}" ]]; then
+    _exiterr "Challenge type dns-01 needs a hook script for deployment... can not continue."
+  fi
+  if [[ "${CHALLENGETYPE}" = "http-01" && ! -d "${WELLKNOWN}" ]]; then
+    _exiterr "WELLKNOWN directory doesn't exist, please create ${WELLKNOWN} and set appropriate permissions."
+  fi
+  [[ "${KEY_ALGO}" =~ ^(rsa|prime256v1|secp384r1)$ ]] || _exiterr "Unknown public key algorithm ${KEY_ALGO}... can not continue."
+  if [[ -n "${IP_VERSION}" ]]; then
+    [[ "${IP_VERSION}" = "4" || "${IP_VERSION}" = "6" ]] || _exiterr "Unknown IP version ${IP_VERSION}... can not continue."
+  fi
+}
+
+# Setup default config values, search for and load configuration files
+load_config() {
+  # Check for config in various locations
+  if [[ -z "${CONFIG:-}" ]]; then
+    for check_config in "/etc/dehydrated" "/usr/local/etc/dehydrated" "${PWD}" "${SCRIPTDIR}"; do
+      if [[ -f "${check_config}/config" ]]; then
+        BASEDIR="${check_config}"
+        CONFIG="${check_config}/config"
+        break
+      fi
+    done
+  fi
+
+  # Default values
+  CA="https://acme-v01.api.letsencrypt.org/directory"
+  LICENSE="https://letsencrypt.org/documents/LE-SA-v1.1.1-August-1-2016.pdf"
+  CERTDIR=
+  ACCOUNTDIR=
+  CHALLENGETYPE="http-01"
+  CONFIG_D=
+  DOMAINS_D=
+  DOMAINS_TXT=
+  HOOK=
+  HOOK_CHAIN="no"
+  RENEW_DAYS="30"
+  KEYSIZE="4096"
+  WELLKNOWN=
+  PRIVATE_KEY_RENEW="yes"
+  KEY_ALGO=rsa
+  OPENSSL_CNF="$(openssl version -d | cut -d\" -f2)/openssl.cnf"
+  CONTACT_EMAIL=
+  LOCKFILE=
+  OCSP_MUST_STAPLE="no"
+  IP_VERSION=
+
+  if [[ -z "${CONFIG:-}" ]]; then
+    echo "#" >&2
+    echo "# !! WARNING !! No main config file found, using default config!" >&2
+    echo "#" >&2
+  elif [[ -f "${CONFIG}" ]]; then
+    echo "# INFO: Using main config file ${CONFIG}"
+    BASEDIR="$(dirname "${CONFIG}")"
+    # shellcheck disable=SC1090
+    . "${CONFIG}"
+  else
+    _exiterr "Specified config file doesn't exist."
+  fi
+
+  if [[ -n "${CONFIG_D}" ]]; then
+    if [[ ! -d "${CONFIG_D}" ]]; then
+      _exiterr "The path ${CONFIG_D} specified for CONFIG_D does not point to a directory." >&2
+    fi
+
+    for check_config_d in "${CONFIG_D}"/*.sh; do
+      if [[ ! -e "${check_config_d}" ]]; then
+        echo "# !! WARNING !! Extra configuration directory ${CONFIG_D} exists, but no configuration found in it." >&2
+        break
+      elif [[ -f "${check_config_d}" ]] && [[ -r "${check_config_d}" ]]; then
+        echo "# INFO: Using additional config file ${check_config_d}"
+        # shellcheck disable=SC1090
+        . "${check_config_d}"
+      else
+        _exiterr "Specified additional config ${check_config_d} is not readable or not a file at all." >&2
+      fi
+   done
+  fi
+
+  # Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality.
+  BASEDIR="${BASEDIR%%/}"
+
+  # Check BASEDIR and set default variables
+  [[ -d "${BASEDIR}" ]] || _exiterr "BASEDIR does not exist: ${BASEDIR}"
+
+  CAHASH="$(echo "${CA}" | urlbase64)"
+  [[ -z "${ACCOUNTDIR}" ]] && ACCOUNTDIR="${BASEDIR}/accounts"
+  mkdir -p "${ACCOUNTDIR}/${CAHASH}"
+  [[ -f "${ACCOUNTDIR}/${CAHASH}/config" ]] && . "${ACCOUNTDIR}/${CAHASH}/config"
+  ACCOUNT_KEY="${ACCOUNTDIR}/${CAHASH}/account_key.pem"
+  ACCOUNT_KEY_JSON="${ACCOUNTDIR}/${CAHASH}/registration_info.json"
+
+  if [[ -f "${BASEDIR}/private_key.pem" ]] && [[ ! -f "${ACCOUNT_KEY}" ]]; then
+    echo "! Moving private_key.pem to ${ACCOUNT_KEY}"
+    mv "${BASEDIR}/private_key.pem" "${ACCOUNT_KEY}"
+  fi
+  if [[ -f "${BASEDIR}/private_key.json" ]] && [[ ! -f "${ACCOUNT_KEY_JSON}" ]]; then
+    echo "! Moving private_key.json to ${ACCOUNT_KEY_JSON}"
+    mv "${BASEDIR}/private_key.json" "${ACCOUNT_KEY_JSON}"
+  fi
+
+  [[ -z "${CERTDIR}" ]] && CERTDIR="${BASEDIR}/certs"
+  [[ -z "${DOMAINS_TXT}" ]] && DOMAINS_TXT="${BASEDIR}/domains.txt"
+  [[ -z "${WELLKNOWN}" ]] && WELLKNOWN="/var/www/dehydrated"
+  [[ -z "${LOCKFILE}" ]] && LOCKFILE="${BASEDIR}/lock"
+  [[ -n "${PARAM_NO_LOCK:-}" ]] && LOCKFILE=""
+
+  [[ -n "${PARAM_HOOK:-}" ]] && HOOK="${PARAM_HOOK}"
+  [[ -n "${PARAM_CERTDIR:-}" ]] && CERTDIR="${PARAM_CERTDIR}"
+  [[ -n "${PARAM_CHALLENGETYPE:-}" ]] && CHALLENGETYPE="${PARAM_CHALLENGETYPE}"
+  [[ -n "${PARAM_KEY_ALGO:-}" ]] && KEY_ALGO="${PARAM_KEY_ALGO}"
+  [[ -n "${PARAM_OCSP_MUST_STAPLE:-}" ]] && OCSP_MUST_STAPLE="${PARAM_OCSP_MUST_STAPLE}"
+  [[ -n "${PARAM_IP_VERSION:-}" ]] && IP_VERSION="${PARAM_IP_VERSION}"
+
+  verify_config
+  store_configvars
+}
+
+# Initialize system
+init_system() {
+  load_config
+
+  # Lockfile handling (prevents concurrent access)
+  if [[ -n "${LOCKFILE}" ]]; then
+    LOCKDIR="$(dirname "${LOCKFILE}")"
+    [[ -w "${LOCKDIR}" ]] || _exiterr "Directory ${LOCKDIR} for LOCKFILE ${LOCKFILE} is not writable, aborting."
+    ( set -C; date > "${LOCKFILE}" ) 2>/dev/null || _exiterr "Lock file '${LOCKFILE}' present, aborting."
+    remove_lock() { rm -f "${LOCKFILE}"; }
+    trap 'remove_lock' EXIT
+  fi
+
+  # Get CA URLs
+  CA_DIRECTORY="$(http_request get "${CA}")"
+  CA_NEW_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-cert)" &&
+  CA_NEW_AUTHZ="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-authz)" &&
+  CA_NEW_REG="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-reg)" &&
+  # shellcheck disable=SC2015
+  CA_REVOKE_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value revoke-cert)" ||
+  _exiterr "Problem retrieving ACME/CA-URLs, check if your configured CA points to the directory entrypoint."
+
+  # Export some environment variables to be used in hook script
+  export WELLKNOWN BASEDIR CERTDIR CONFIG
+
+  # Checking for private key ...
+  register_new_key="no"
+  if [[ -n "${PARAM_ACCOUNT_KEY:-}" ]]; then
+    # a private key was specified from the command line so use it for this run
+    echo "Using private key ${PARAM_ACCOUNT_KEY} instead of account key"
+    ACCOUNT_KEY="${PARAM_ACCOUNT_KEY}"
+    ACCOUNT_KEY_JSON="${PARAM_ACCOUNT_KEY}.json"
+  else
+    # Check if private account key exists, if it doesn't exist yet generate a new one (rsa key)
+    if [[ ! -e "${ACCOUNT_KEY}" ]]; then
+      echo "+ Generating account key..."
+      _openssl genrsa -out "${ACCOUNT_KEY}" "${KEYSIZE}"
+      register_new_key="yes"
+    fi
+  fi
+  openssl rsa -in "${ACCOUNT_KEY}" -check 2>/dev/null > /dev/null || _exiterr "Account key is not valid, can not continue."
+
+  # Get public components from private key and calculate thumbprint
+  pubExponent64="$(printf '%x' "$(openssl rsa -in "${ACCOUNT_KEY}" -noout -text | awk '/publicExponent/ {print $2}')" | hex2bin | urlbase64)"
+  pubMod64="$(openssl rsa -in "${ACCOUNT_KEY}" -noout -modulus | cut -d'=' -f2 | hex2bin | urlbase64)"
+
+  thumbprint="$(printf '{"e":"%s","kty":"RSA","n":"%s"}' "${pubExponent64}" "${pubMod64}" | openssl dgst -sha256 -binary | urlbase64)"
+
+  # If we generated a new private key in the step above we have to register it with the acme-server
+  if [[ "${register_new_key}" = "yes" ]]; then
+    echo "+ Registering account key with ACME server..."
+    [[ ! -z "${CA_NEW_REG}" ]] || _exiterr "Certificate authority doesn't allow registrations."
+    # If an email for the contact has been provided then adding it to the registration request
+    FAILED=false
+    if [[ -n "${CONTACT_EMAIL}" ]]; then
+      (signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > "${ACCOUNT_KEY_JSON}") || FAILED=true
+    else
+      (signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > "${ACCOUNT_KEY_JSON}") || FAILED=true
+    fi
+    if [[ "${FAILED}" = "true" ]]; then
+      echo
+      echo
+      echo "Error registering account key. See message above for more information."
+      rm "${ACCOUNT_KEY}" "${ACCOUNT_KEY_JSON}"
+      exit 1
+    fi
+  fi
+
+}
+
+# Different sed version for different os types...
+_sed() {
+  if [[ "${OSTYPE}" = "Linux" ]]; then
+    sed -r "${@}"
+  else
+    sed -E "${@}"
+  fi
+}
+
+# Print error message and exit with error
+_exiterr() {
+  echo "ERROR: ${1}" >&2
+  exit 1
+}
+
+# Remove newlines and whitespace from json
+clean_json() {
+  tr -d '\r\n' | _sed -e 's/ +/ /g' -e 's/\{ /{/g' -e 's/ \}/}/g' -e 's/\[ /[/g' -e 's/ \]/]/g'
+}
+
+# Encode data as url-safe formatted base64
+urlbase64() {
+  # urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_'
+  openssl base64 -e | tr -d '\n\r' | _sed -e 's:=*$::g' -e 'y:+/:-_:'
+}
+
+# Convert hex string to binary data
+hex2bin() {
+  # Remove spaces, add leading zero, escape as hex string and parse with printf
+  printf -- "$(cat | _sed -e 's/[[:space:]]//g' -e 's/^(.(.{2})*)$/0\1/' -e 's/(.{2})/\\x\1/g')"
+}
+
+# Get string value from json dictionary
+get_json_string_value() {
+  local filter
+  filter=$(printf 's/.*"%s": *"\([^"]*\)".*/\\1/p' "$1")
+  sed -n "${filter}"
+}
+
+# OpenSSL writes to stderr/stdout even when there are no errors. So just
+# display the output if the exit code was != 0 to simplify debugging.
+_openssl() {
+  set +e
+  out="$(openssl "${@}" 2>&1)"
+  res=$?
+  set -e
+  if [[ ${res} -ne 0 ]]; then
+    echo "  + ERROR: failed to run $* (Exitcode: ${res})" >&2
+    echo >&2
+    echo "Details:" >&2
+    echo "${out}" >&2
+    echo >&2
+    exit ${res}
+  fi
+}
+
+# Send http(s) request with specified method
+http_request() {
+  tempcont="$(_mktemp)"
+
+  if [[ -n "${IP_VERSION:-}" ]]; then
+      ip_version="-${IP_VERSION}"
+  fi
+
+  set +e
+  if [[ "${1}" = "head" ]]; then
+    statuscode="$(curl ${ip_version:-} -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)"
+    curlret="${?}"
+  elif [[ "${1}" = "get" ]]; then
+    statuscode="$(curl ${ip_version:-} -s -w "%{http_code}" -o "${tempcont}" "${2}")"
+    curlret="${?}"
+  elif [[ "${1}" = "post" ]]; then
+    statuscode="$(curl ${ip_version:-} -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")"
+    curlret="${?}"
+  else
+    set -e
+    _exiterr "Unknown request method: ${1}"
+  fi
+  set -e
+
+  if [[ ! "${curlret}" = "0" ]]; then
+    _exiterr "Problem connecting to server (${1} for ${2}; curl returned with ${curlret})"
+  fi
+
+  if [[ ! "${statuscode:0:1}" = "2" ]]; then
+    echo "  + ERROR: An error occurred while sending ${1}-request to ${2} (Status ${statuscode})" >&2
+    echo >&2
+    echo "Details:" >&2
+    cat "${tempcont}" >&2
+    echo >&2
+    echo >&2
+    rm -f "${tempcont}"
+
+    # Wait for hook script to clean the challenge if used
+    if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token:+set}" ]]; then
+      "${HOOK}" "clean_challenge" '' "${challenge_token}" "${keyauth}"
+    fi
+
+    # remove temporary domains.txt file if used
+    [[ -n "${PARAM_DOMAIN:-}" && -n "${DOMAINS_TXT:-}" ]] && rm "${DOMAINS_TXT}"
+    exit 1
+  fi
+
+  cat "${tempcont}"
+  rm -f "${tempcont}"
+}
+
+# Send signed request
+signed_request() {
+  # Encode payload as urlbase64
+  payload64="$(printf '%s' "${2}" | urlbase64)"
+
+  # Retrieve nonce from acme-server
+  nonce="$(http_request head "${CA}" | grep Replay-Nonce: | awk -F ': ' '{print $2}' | tr -d '\n\r')"
+
+  # Build header with just our public key and algorithm information
+  header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}'
+
+  # Build another header which also contains the previously received nonce and encode it as urlbase64
+  protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}'
+  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}.${payload64}" | openssl dgst -sha256 -sign "${ACCOUNT_KEY}" | urlbase64)"
+
+  # Send header + extended header + payload + signature to the acme-server
+  data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
+
+  http_request post "${1}" "${data}"
+}
+
+# Extracts all subject names from a CSR
+# Outputs either the CN, or the SANs, one per line
+extract_altnames() {
+  csr="${1}" # the CSR itself (not a file)
+
+  if ! <<<"${csr}" openssl req -verify -noout 2>/dev/null; then
+    _exiterr "Certificate signing request isn't valid"
+  fi
+
+  reqtext="$( <<<"${csr}" openssl req -noout -text )"
+  if <<<"${reqtext}" grep -q '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$'; then
+    # SANs used, extract these
+    altnames="$( <<<"${reqtext}" grep -A1 '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$' | tail -n1 )"
+    # split to one per line:
+    # shellcheck disable=SC1003
+    altnames="$( <<<"${altnames}" _sed -e 's/^[[:space:]]*//; s/, /\'$'\n''/g' )"
+    # we can only get DNS: ones signed
+    if grep -qv '^DNS:' <<<"${altnames}"; then
+      _exiterr "Certificate signing request contains non-DNS Subject Alternative Names"
+    fi
+    # strip away the DNS: prefix
+    altnames="$( <<<"${altnames}" _sed -e 's/^DNS://' )"
+    echo "${altnames}"
+
+  else
+    # No SANs, extract CN
+    altnames="$( <<<"${reqtext}" grep '^[[:space:]]*Subject:' | _sed -e 's/.* CN=([^ /,]*).*/\1/' )"
+    echo "${altnames}"
+  fi
+}
+
+# Create certificate for domain(s) and outputs it FD 3
+sign_csr() {
+  csr="${1}" # the CSR itself (not a file)
+
+  if { true >&3; } 2>/dev/null; then
+    : # fd 3 looks OK
+  else
+    _exiterr "sign_csr: FD 3 not open"
+  fi
+
+  shift 1 || true
+  altnames="${*:-}"
+  if [ -z "${altnames}" ]; then
+    altnames="$( extract_altnames "${csr}" )"
+  fi
+
+  if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
+    _exiterr "Certificate authority doesn't allow certificate signing"
+  fi
+
+  local idx=0
+  if [[ -n "${ZSH_VERSION:-}" ]]; then
+    local -A challenge_uris challenge_tokens keyauths deploy_args
+  else
+    local -a challenge_uris challenge_tokens keyauths deploy_args
+  fi
+
+  # Request 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 ${altname}..."
+    response="$(signed_request "${CA_NEW_AUTHZ}" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}' | clean_json)"
+
+    challenges="$(printf '%s\n' "${response}" | sed -n 's/.*\("challenges":[^\[]*\[[^]]*]\).*/\1/p')"
+    repl=$'\n''{' # fix syntax highlighting in Vim
+    challenge="$(printf "%s" "${challenges//\{/${repl}}" | grep \""${CHALLENGETYPE}"\")"
+    challenge_token="$(printf '%s' "${challenge}" | get_json_string_value token | _sed 's/[^A-Za-z0-9_\-]/_/g')"
+    challenge_uri="$(printf '%s' "${challenge}" | get_json_string_value uri)"
+
+    if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then
+      _exiterr "Can't retrieve challenges (${response})"
+    fi
+
+    # Challenge response consists of the challenge token and the thumbprint of our public certificate
+    keyauth="${challenge_token}.${thumbprint}"
+
+    case "${CHALLENGETYPE}" in
+      "http-01")
+        # Store challenge response in well-known location and make world-readable (so that a webserver can access it)
+        printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}"
+        chmod a+r "${WELLKNOWN}/${challenge_token}"
+        keyauth_hook="${keyauth}"
+        ;;
+      "dns-01")
+        # Generate DNS entry content for dns-01 validation
+        keyauth_hook="$(printf '%s' "${keyauth}" | openssl dgst -sha256 -binary | urlbase64)"
+        ;;
+    esac
+
+    challenge_uris[${idx}]="${challenge_uri}"
+    keyauths[${idx}]="${keyauth}"
+    challenge_tokens[${idx}]="${challenge_token}"
+    # Note: assumes args will never have spaces!
+    deploy_args[${idx}]="${altname} ${challenge_token} ${keyauth_hook}"
+    idx=$((idx+1))
+  done
+
+  # Wait for hook script to deploy the challenges if used
+  # shellcheck disable=SC2068
+  [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[@]}
+
+  # Respond to challenges
+  idx=0
+  for altname in ${altnames}; do
+    challenge_token="${challenge_tokens[${idx}]}"
+    keyauth="${keyauths[${idx}]}"
+
+    # Wait for hook script to deploy the challenge if used
+    # shellcheck disable=SC2086
+    [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[${idx}]}
+
+    # Ask the acme-server to verify our challenge and wait until it is no longer pending
+    echo " + Responding to challenge for ${altname}..."
+    result="$(signed_request "${challenge_uris[${idx}]}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}' | clean_json)"
+
+    reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
+
+    while [[ "${reqstatus}" = "pending" ]]; do
+      sleep 1
+      result="$(http_request get "${challenge_uris[${idx}]}")"
+      reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
+    done
+
+    [[ "${CHALLENGETYPE}" = "http-01" ]] && rm -f "${WELLKNOWN}/${challenge_token}"
+
+    # Wait for hook script to clean the challenge if used
+    if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token}" ]]; then
+      # shellcheck disable=SC2086
+      "${HOOK}" "clean_challenge" ${deploy_args[${idx}]}
+    fi
+    idx=$((idx+1))
+
+    if [[ "${reqstatus}" = "valid" ]]; then
+      echo " + Challenge is valid!"
+    else
+      break
+    fi
+  done
+
+  # Wait for hook script to clean the challenges if used
+  # shellcheck disable=SC2068
+  [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "clean_challenge" ${deploy_args[@]}
+
+  if [[ "${reqstatus}" != "valid" ]]; then
+    # Clean up any remaining challenge_tokens if we stopped early
+    if [[ "${CHALLENGETYPE}" = "http-01" ]]; then
+      while [ ${idx} -lt ${#challenge_tokens[@]} ]; do
+        rm -f "${WELLKNOWN}/${challenge_tokens[${idx}]}"
+        idx=$((idx+1))
+      done
+    fi
+
+    _exiterr "Challenge is invalid! (returned: ${reqstatus}) (result: ${result})"
+  fi
+
+  # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem
+  echo " + Requesting certificate..."
+  csr64="$( <<<"${csr}" openssl req -outform DER | urlbase64)"
+  crt64="$(signed_request "${CA_NEW_CERT}" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)"
+  crt="$( printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" )"
+
+  # Try to load the certificate to detect corruption
+  echo " + Checking certificate..."
+  _openssl x509 -text <<<"${crt}"
+
+  echo "${crt}" >&3
+
+  unset challenge_token
+  echo " + Done!"
+}
+
+# Create certificate for domain(s)
+sign_domain() {
+  domain="${1}"
+  altnames="${*}"
+  timestamp="$(date +%s)"
+
+  echo " + Signing domains..."
+  if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
+    _exiterr "Certificate authority doesn't allow certificate signing"
+  fi
+
+  # If there is no existing certificate directory => make it
+  if [[ ! -e "${CERTDIR}/${domain}" ]]; then
+    echo " + Creating new directory ${CERTDIR}/${domain} ..."
+    mkdir -p "${CERTDIR}/${domain}" || _exiterr "Unable to create directory ${CERTDIR}/${domain}"
+  fi
+
+  privkey="privkey.pem"
+  # generate a new private key if we need or want one
+  if [[ ! -r "${CERTDIR}/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
+    echo " + Generating private key..."
+    privkey="privkey-${timestamp}.pem"
+    case "${KEY_ALGO}" in
+      rsa) _openssl genrsa -out "${CERTDIR}/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}";;
+      prime256v1|secp384r1) _openssl ecparam -genkey -name "${KEY_ALGO}" -out "${CERTDIR}/${domain}/privkey-${timestamp}.pem";;
+    esac
+  fi
+
+  # Generate signing request config and the actual signing request
+  echo " + Generating signing request..."
+  SAN=""
+  for altname in ${altnames}; do
+    SAN+="DNS:${altname}, "
+  done
+  SAN="${SAN%%, }"
+  local tmp_openssl_cnf
+  tmp_openssl_cnf="$(_mktemp)"
+  cat "${OPENSSL_CNF}" > "${tmp_openssl_cnf}"
+  printf "[SAN]\nsubjectAltName=%s" "${SAN}" >> "${tmp_openssl_cnf}"
+  if [ "${OCSP_MUST_STAPLE}" = "yes" ]; then
+    printf "\n1.3.6.1.5.5.7.1.24=DER:30:03:02:01:05" >> "${tmp_openssl_cnf}"
+  fi
+  openssl req -new -sha256 -key "${CERTDIR}/${domain}/${privkey}" -out "${CERTDIR}/${domain}/cert-${timestamp}.csr" -subj "/CN=${domain}/" -reqexts SAN -config "${tmp_openssl_cnf}"
+  rm -f "${tmp_openssl_cnf}"
+
+  crt_path="${CERTDIR}/${domain}/cert-${timestamp}.pem"
+  # shellcheck disable=SC2086
+  sign_csr "$(< "${CERTDIR}/${domain}/cert-${timestamp}.csr" )" ${altnames} 3>"${crt_path}"
+
+  # Create fullchain.pem
+  echo " + Creating fullchain.pem..."
+  cat "${crt_path}" > "${CERTDIR}/${domain}/fullchain-${timestamp}.pem"
+  http_request get "$(openssl x509 -in "${CERTDIR}/${domain}/cert-${timestamp}.pem" -noout -text | grep 'CA Issuers - URI:' | cut -d':' -f2-)" > "${CERTDIR}/${domain}/chain-${timestamp}.pem"
+  if ! grep -q "BEGIN CERTIFICATE" "${CERTDIR}/${domain}/chain-${timestamp}.pem"; then
+    openssl x509 -in "${CERTDIR}/${domain}/chain-${timestamp}.pem" -inform DER -out "${CERTDIR}/${domain}/chain-${timestamp}.pem" -outform PEM
+  fi
+  cat "${CERTDIR}/${domain}/chain-${timestamp}.pem" >> "${CERTDIR}/${domain}/fullchain-${timestamp}.pem"
+
+  # Update symlinks
+  [[ "${privkey}" = "privkey.pem" ]] || ln -sf "privkey-${timestamp}.pem" "${CERTDIR}/${domain}/privkey.pem"
+
+  ln -sf "chain-${timestamp}.pem" "${CERTDIR}/${domain}/chain.pem"
+  ln -sf "fullchain-${timestamp}.pem" "${CERTDIR}/${domain}/fullchain.pem"
+  ln -sf "cert-${timestamp}.csr" "${CERTDIR}/${domain}/cert.csr"
+  ln -sf "cert-${timestamp}.pem" "${CERTDIR}/${domain}/cert.pem"
+
+  # Wait for hook script to clean the challenge and to deploy cert if used
+  export KEY_ALGO
+  [[ -n "${HOOK}" ]] && "${HOOK}" "deploy_cert" "${domain}" "${CERTDIR}/${domain}/privkey.pem" "${CERTDIR}/${domain}/cert.pem" "${CERTDIR}/${domain}/fullchain.pem" "${CERTDIR}/${domain}/chain.pem" "${timestamp}"
+
+  unset challenge_token
+  echo " + Done!"
+}
+
+# Usage: --cron (-c)
+# Description: Sign/renew non-existant/changed/expiring certificates.
+command_sign_domains() {
+  init_system
+
+  if [[ -n "${PARAM_DOMAIN:-}" ]]; then
+    DOMAINS_TXT="$(_mktemp)"
+    printf -- "${PARAM_DOMAIN}" > "${DOMAINS_TXT}"
+  elif [[ -e "${DOMAINS_TXT}" ]]; then
+    if [[ ! -r "${DOMAINS_TXT}" ]]; then
+      _exiterr "domains.txt found but not readable"
+    fi
+  else
+    _exiterr "domains.txt not found and --domain not given"
+  fi
+
+  # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire
+  ORIGIFS="${IFS}"
+  IFS=$'\n'
+  for line in $(<"${DOMAINS_TXT}" tr -d '\r' | tr '[:upper:]' '[:lower:]' | _sed -e 's/^[[:space:]]*//g' -e 's/[[:space:]]*$//g' -e 's/[[:space:]]+/ /g' | (grep -vE '^(#|$)' || true)); do
+    reset_configvars
+    IFS="${ORIGIFS}"
+    domain="$(printf '%s\n' "${line}" | cut -d' ' -f1)"
+    morenames="$(printf '%s\n' "${line}" | cut -s -d' ' -f2-)"
+    cert="${CERTDIR}/${domain}/cert.pem"
+
+    force_renew="${PARAM_FORCE:-no}"
+
+    if [[ -z "${morenames}" ]];then
+      echo "Processing ${domain}"
+    else
+      echo "Processing ${domain} with alternative names: ${morenames}"
+    fi
+
+    # read cert config
+    # for now this loads the certificate specific config in a subshell and parses a diff of set variables.
+    # we could just source the config file but i decided to go this way to protect people from accidentally overriding
+    # variables used internally by this script itself.
+    if [[ -n "${DOMAINS_D}" ]]; then
+      certconfig="${DOMAINS_D}/${domain}"
+    else
+      certconfig="${CERTDIR}/${domain}/config"
+    fi
+
+    if [ -f "${certconfig}" ]; then
+      echo " + Using certificate specific config file!"
+      ORIGIFS="${IFS}"
+      IFS=$'\n'
+      for cfgline in $(
+        beforevars="$(_mktemp)"
+        aftervars="$(_mktemp)"
+        set > "${beforevars}"
+        # shellcheck disable=SC1090
+        . "${certconfig}"
+        set > "${aftervars}"
+        diff -u "${beforevars}" "${aftervars}" | grep -E '^\+[^+]'
+        rm "${beforevars}"
+        rm "${aftervars}"
+      ); do
+        config_var="$(echo "${cfgline:1}" | cut -d'=' -f1)"
+        config_value="$(echo "${cfgline:1}" | cut -d'=' -f2-)"
+        case "${config_var}" in
+          KEY_ALGO|OCSP_MUST_STAPLE|PRIVATE_KEY_RENEW|KEYSIZE|CHALLENGETYPE|HOOK|WELLKNOWN|HOOK_CHAIN|OPENSSL_CNF|RENEW_DAYS)
+            echo "   + ${config_var} = ${config_value}"
+            declare -- "${config_var}=${config_value}"
+            ;;
+          _) ;;
+          *) echo "   ! Setting ${config_var} on a per-certificate base is not (yet) supported"
+        esac
+      done
+      IFS="${ORIGIFS}"
+    fi
+    verify_config
+
+    if [[ -e "${cert}" ]]; then
+      printf " + Checking domain name(s) of existing cert..."
+
+      certnames="$(openssl x509 -in "${cert}" -text -noout | grep DNS: | _sed 's/DNS://g' | tr -d ' ' | tr ',' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//')"
+      givennames="$(echo "${domain}" "${morenames}"| tr ' ' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//' | _sed 's/^ //')"
+
+      if [[ "${certnames}" = "${givennames}" ]]; then
+        echo " unchanged."
+      else
+        echo " changed!"
+        echo " + Domain name(s) are not matching!"
+        echo " + Names in old certificate: ${certnames}"
+        echo " + Configured names: ${givennames}"
+        echo " + Forcing renew."
+        force_renew="yes"
+      fi
+    fi
+
+    if [[ -e "${cert}" ]]; then
+      echo " + Checking expire date of existing cert..."
+      valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )"
+
+      printf " + Valid till %s " "${valid}"
+      if openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; then
+        printf "(Longer than %d days). " "${RENEW_DAYS}"
+        if [[ "${force_renew}" = "yes" ]]; then
+          echo "Ignoring because renew was forced!"
+        else
+          # Certificate-Names unchanged and cert is still valid
+          echo "Skipping renew!"
+          [[ -n "${HOOK}" ]] && "${HOOK}" "unchanged_cert" "${domain}" "${CERTDIR}/${domain}/privkey.pem" "${CERTDIR}/${domain}/cert.pem" "${CERTDIR}/${domain}/fullchain.pem" "${CERTDIR}/${domain}/chain.pem"
+          continue
+        fi
+      else
+        echo "(Less than ${RENEW_DAYS} days). Renewing!"
+      fi
+    fi
+
+    # shellcheck disable=SC2086
+    if [[ "${PARAM_KEEP_GOING:-}" = "yes" ]]; then
+      sign_domain ${line} &
+      wait $! || true
+    else
+      sign_domain ${line}
+    fi
+  done
+
+  # remove temporary domains.txt file if used
+  [[ -n "${PARAM_DOMAIN:-}" ]] && rm -f "${DOMAINS_TXT}"
+
+  exit 0
+}
+
+# Usage: --signcsr (-s) path/to/csr.pem
+# Description: Sign a given CSR, output CRT on stdout (advanced usage)
+command_sign_csr() {
+  # redirect stdout to stderr
+  # leave stdout over at fd 3 to output the cert
+  exec 3>&1 1>&2
+
+  init_system
+
+  csrfile="${1}"
+  if [ ! -r "${csrfile}" ]; then
+    _exiterr "Could not read certificate signing request ${csrfile}"
+  fi
+
+  # gen cert
+  certfile="$(_mktemp)"
+  sign_csr "$(< "${csrfile}" )" 3> "${certfile}"
+
+  # print cert
+  echo "# CERT #" >&3
+  cat "${certfile}" >&3
+  echo >&3
+
+  # print chain
+  if [ -n "${PARAM_FULL_CHAIN:-}" ]; then
+    # get and convert ca cert
+    chainfile="$(_mktemp)"
+    http_request get "$(openssl x509 -in "${certfile}" -noout -text | grep 'CA Issuers - URI:' | cut -d':' -f2-)" > "${chainfile}"
+
+    if ! grep -q "BEGIN CERTIFICATE" "${chainfile}"; then
+      openssl x509 -inform DER -in "${chainfile}" -outform PEM -out "${chainfile}"
+    fi
+
+    echo "# CHAIN #" >&3
+    cat "${chainfile}" >&3
+
+    rm "${chainfile}"
+  fi
+
+  # cleanup
+  rm "${certfile}"
+
+  exit 0
+}
+
+# Usage: --revoke (-r) path/to/cert.pem
+# Description: Revoke specified certificate
+command_revoke() {
+  init_system
+
+  [[ -n "${CA_REVOKE_CERT}" ]] || _exiterr "Certificate authority doesn't allow certificate revocation."
+
+  cert="${1}"
+  if [[ -L "${cert}" ]]; then
+    # follow symlink and use real certificate name (so we move the real file and not the symlink at the end)
+    local link_target
+    link_target="$(readlink -n "${cert}")"
+    if [[ "${link_target}" =~ ^/ ]]; then
+      cert="${link_target}"
+    else
+      cert="$(dirname "${cert}")/${link_target}"
+    fi
+  fi
+  [[ -f "${cert}" ]] || _exiterr "Could not find certificate ${cert}"
+
+  echo "Revoking ${cert}"
+
+  cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)"
+  response="$(signed_request "${CA_REVOKE_CERT}" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}' | clean_json)"
+  # 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 " + Done."
+  echo " + Renaming certificate to ${cert}-revoked"
+  mv -f "${cert}" "${cert}-revoked"
+}
+
+# Usage: --cleanup (-gc)
+# Description: Move unused certificate files to archive directory
+command_cleanup() {
+  load_config
+
+  # Create global archive directory if not existant
+  if [[ ! -e "${BASEDIR}/archive" ]]; then
+    mkdir "${BASEDIR}/archive"
+  fi
+
+  # Loop over all certificate directories
+  for certdir in "${CERTDIR}/"*; do
+    # Skip if entry is not a folder
+    [[ -d "${certdir}" ]] || continue
+
+    # Get certificate name
+    certname="$(basename "${certdir}")"
+
+    # Create certitifaces archive directory if not existant
+    archivedir="${BASEDIR}/archive/${certname}"
+    if [[ ! -e "${archivedir}" ]]; then
+      mkdir "${archivedir}"
+    fi
+
+    # Loop over file-types (certificates, keys, signing-requests, ...)
+    for filetype in cert.csr cert.pem chain.pem fullchain.pem privkey.pem; do
+      # Skip if symlink is broken
+      [[ -r "${certdir}/${filetype}" ]] || continue
+
+      # Look up current file in use
+      current="$(basename "$(readlink "${certdir}/${filetype}")")"
+
+      # Split filetype into name and extension
+      filebase="$(echo "${filetype}" | cut -d. -f1)"
+      fileext="$(echo "${filetype}" | cut -d. -f2)"
+
+      # Loop over all files of this type
+      for file in "${certdir}/${filebase}-"*".${fileext}"; do
+        # Handle case where no files match the wildcard
+        [[ -f "${file}" ]] || break
+
+        # Check if current file is in use, if unused move to archive directory
+        filename="$(basename "${file}")"
+        if [[ ! "${filename}" = "${current}" ]]; then
+          echo "Moving unused file to archive directory: ${certname}/${filename}"
+          mv "${certdir}/${filename}" "${archivedir}/${filename}"
+        fi
+      done
+    done
+  done
+
+  exit 0
+}
+
+# Usage: --help (-h)
+# Description: Show help text
+command_help() {
+  printf "Usage: %s [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...\n\n" "${0}"
+  printf "Default command: help\n\n"
+  echo "Commands:"
+  grep -e '^[[:space:]]*# Usage:' -e '^[[:space:]]*# Description:' -e '^command_.*()[[:space:]]*{' "${0}" | while read -r usage; read -r description; read -r command; do
+    if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]] || [[ ! "${command}" =~ ^command_ ]]; then
+      _exiterr "Error generating help text."
+    fi
+    printf " %-32s %s\n" "${usage##"# Usage: "}" "${description##"# Description: "}"
+  done
+  printf -- "\nParameters:\n"
+  grep -E -e '^[[:space:]]*# PARAM_Usage:' -e '^[[:space:]]*# PARAM_Description:' "${0}" | while read -r usage; read -r description; do
+    if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]]; then
+      _exiterr "Error generating help text."
+    fi
+    printf " %-32s %s\n" "${usage##"# PARAM_Usage: "}" "${description##"# PARAM_Description: "}"
+  done
+}
+
+# Usage: --env (-e)
+# Description: Output configuration variables for use in other scripts
+command_env() {
+  echo "# dehydrated configuration"
+  load_config
+  typeset -p CA LICENSE CERTDIR CHALLENGETYPE DOMAINS_D DOMAINS_TXT HOOK HOOK_CHAIN RENEW_DAYS ACCOUNT_KEY ACCOUNT_KEY_JSON KEYSIZE WELLKNOWN PRIVATE_KEY_RENEW OPENSSL_CNF CONTACT_EMAIL LOCKFILE
+}
+
+# Main method (parses script arguments and calls command_* methods)
+main() {
+  COMMAND=""
+  set_command() {
+    [[ -z "${COMMAND}" ]] || _exiterr "Only one command can be executed at a time. See help (-h) for more information."
+    COMMAND="${1}"
+  }
+
+  check_parameters() {
+    if [[ -z "${1:-}" ]]; then
+      echo "The specified command requires additional parameters. See help:" >&2
+      echo >&2
+      command_help >&2
+      exit 1
+    elif [[ "${1:0:1}" = "-" ]]; then
+      _exiterr "Invalid argument: ${1}"
+    fi
+  }
+
+  [[ -z "${@}" ]] && eval set -- "--help"
+
+  while (( ${#} )); do
+    case "${1}" in
+      --help|-h)
+        command_help
+        exit 0
+        ;;
+
+      --env|-e)
+        set_command env
+        ;;
+
+      --cron|-c)
+        set_command sign_domains
+        ;;
+
+      --signcsr|-s)
+        shift 1
+        set_command sign_csr
+        check_parameters "${1:-}"
+        PARAM_CSR="${1}"
+        ;;
+
+      --revoke|-r)
+        shift 1
+        set_command revoke
+        check_parameters "${1:-}"
+        PARAM_REVOKECERT="${1}"
+        ;;
+
+      --cleanup|-gc)
+        set_command cleanup
+        ;;
+
+      # PARAM_Usage: --full-chain (-fc)
+      # PARAM_Description: Print full chain when using --signcsr
+      --full-chain|-fc)
+        PARAM_FULL_CHAIN="1"
+        ;;
+
+      # PARAM_Usage: --ipv4 (-4)
+      # PARAM_Description: Resolve names to IPv4 addresses only
+      --ipv4|-4)
+        PARAM_IP_VERSION="4"
+        ;;
+
+      # PARAM_Usage: --ipv6 (-6)
+      # PARAM_Description: Resolve names to IPv6 addresses only
+      --ipv6|-6)
+        PARAM_IP_VERSION="6"
+        ;;
+
+      # PARAM_Usage: --domain (-d) domain.tld
+      # PARAM_Description: Use specified domain name(s) instead of domains.txt entry (one certificate!)
+      --domain|-d)
+        shift 1
+        check_parameters "${1:-}"
+        if [[ -z "${PARAM_DOMAIN:-}" ]]; then
+          PARAM_DOMAIN="${1}"
+        else
+          PARAM_DOMAIN="${PARAM_DOMAIN} ${1}"
+         fi
+        ;;
+
+      # PARAM_Usage: --keep-going (-g)
+      # PARAM_Description: Keep going after encountering an error while creating/renewing multiple certificates in cron mode
+      --keep-going|-g)
+        PARAM_KEEP_GOING="yes"
+        ;;
+
+      # PARAM_Usage: --force (-x)
+      # PARAM_Description: Force renew of certificate even if it is longer valid than value in RENEW_DAYS
+      --force|-x)
+        PARAM_FORCE="yes"
+        ;;
+
+      # PARAM_Usage: --no-lock (-n)
+      # PARAM_Description: Don't use lockfile (potentially dangerous!)
+      --no-lock|-n)
+        PARAM_NO_LOCK="yes"
+        ;;
+
+      # PARAM_Usage: --ocsp
+      # PARAM_Description: Sets option in CSR indicating OCSP stapling to be mandatory
+      --ocsp)
+        PARAM_OCSP_MUST_STAPLE="yes"
+        ;;
+
+      # PARAM_Usage: --privkey (-p) path/to/key.pem
+      # PARAM_Description: Use specified private key instead of account key (useful for revocation)
+      --privkey|-p)
+        shift 1
+        check_parameters "${1:-}"
+        PARAM_ACCOUNT_KEY="${1}"
+        ;;
+
+      # PARAM_Usage: --config (-f) path/to/config
+      # PARAM_Description: Use specified config file
+      --config|-f)
+        shift 1
+        check_parameters "${1:-}"
+        CONFIG="${1}"
+        ;;
+
+      # PARAM_Usage: --hook (-k) path/to/hook.sh
+      # PARAM_Description: Use specified script for hooks
+      --hook|-k)
+        shift 1
+        check_parameters "${1:-}"
+        PARAM_HOOK="${1}"
+        ;;
+
+      # PARAM_Usage: --out (-o) certs/directory
+      # PARAM_Description: Output certificates into the specified directory
+      --out|-o)
+        shift 1
+        check_parameters "${1:-}"
+        PARAM_CERTDIR="${1}"
+        ;;
+
+      # PARAM_Usage: --challenge (-t) http-01|dns-01
+      # PARAM_Description: Which challenge should be used? Currently http-01 and dns-01 are supported
+      --challenge|-t)
+        shift 1
+        check_parameters "${1:-}"
+        PARAM_CHALLENGETYPE="${1}"
+        ;;
+
+      # PARAM_Usage: --algo (-a) rsa|prime256v1|secp384r1
+      # PARAM_Description: Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
+      --algo|-a)
+        shift 1
+        check_parameters "${1:-}"
+        PARAM_KEY_ALGO="${1}"
+        ;;
+
+      *)
+        echo "Unknown parameter detected: ${1}" >&2
+        echo >&2
+        command_help >&2
+        exit 1
+        ;;
+    esac
+
+    shift 1
+  done
+
+  case "${COMMAND}" in
+    env) command_env;;
+    sign_domains) command_sign_domains;;
+    sign_csr) command_sign_csr "${PARAM_CSR}";;
+    revoke) command_revoke "${PARAM_REVOKECERT}";;
+    cleanup) command_cleanup;;
+    *) command_help; exit 1;;
+  esac
+}
+
+# Determine OS type
+OSTYPE="$(uname)"
+
+# Check for missing dependencies
+check_dependencies
+
+# Run script
+main "${@:-}"
diff --git a/dehydrated.sh b/dehydrated.sh
deleted file mode 100755
index 4e2a563..0000000
--- a/dehydrated.sh
+++ /dev/null
@@ -1,1116 +0,0 @@
-#!/usr/bin/env bash
-
-# dehydrated.sh by lukas2511
-# Source: https://github.com/lukas2511/dehydrated
-#
-# This script is licensed under The MIT License (see LICENSE for more information).
-
-set -e
-set -u
-set -o pipefail
-[[ -n "${ZSH_VERSION:-}" ]] && set -o SH_WORD_SPLIT && set +o FUNCTION_ARGZERO
-umask 077 # paranoid umask, we're creating private keys
-
-# Find directory in which this script is stored by traversing all symbolic links
-SOURCE="${0}"
-while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
-  DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
-  SOURCE="$(readlink "$SOURCE")"
-  [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
-done
-SCRIPTDIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
-
-BASEDIR="${SCRIPTDIR}"
-
-# Create (identifiable) temporary files
-_mktemp() {
-  # shellcheck disable=SC2068
-  mktemp ${@:-} "${TMPDIR:-/tmp}/dehydrated.sh-XXXXXX"
-}
-
-# Check for script dependencies
-check_dependencies() {
-  # just execute some dummy and/or version commands to see if required tools exist and are actually usable
-  openssl version > /dev/null 2>&1 || _exiterr "This script requires an openssl binary."
-  _sed "" < /dev/null > /dev/null 2>&1 || _exiterr "This script requires sed with support for extended (modern) regular expressions."
-  command -v grep > /dev/null 2>&1 || _exiterr "This script requires grep."
-  _mktemp -u > /dev/null 2>&1 || _exiterr "This script requires mktemp."
-  diff -u /dev/null /dev/null || _exiterr "This script requires diff."
-
-  # curl returns with an error code in some ancient versions so we have to catch that
-  set +e
-  curl -V > /dev/null 2>&1
-  retcode="$?"
-  set -e
-  if [[ ! "${retcode}" = "0" ]] && [[ ! "${retcode}" = "2" ]]; then
-    _exiterr "This script requires curl."
-  fi
-}
-
-store_configvars() {
-  __KEY_ALGO="${KEY_ALGO}"
-  __OCSP_MUST_STAPLE="${OCSP_MUST_STAPLE}"
-  __PRIVATE_KEY_RENEW="${PRIVATE_KEY_RENEW}"
-  __KEYSIZE="${KEYSIZE}"
-  __CHALLENGETYPE="${CHALLENGETYPE}"
-  __HOOK="${HOOK}"
-  __WELLKNOWN="${WELLKNOWN}"
-  __HOOK_CHAIN="${HOOK_CHAIN}"
-  __OPENSSL_CNF="${OPENSSL_CNF}"
-  __RENEW_DAYS="${RENEW_DAYS}"
-  __IP_VERSION="${IP_VERSION}"
-}
-
-reset_configvars() {
-  KEY_ALGO="${__KEY_ALGO}"
-  OCSP_MUST_STAPLE="${__OCSP_MUST_STAPLE}"
-  PRIVATE_KEY_RENEW="${__PRIVATE_KEY_RENEW}"
-  KEYSIZE="${__KEYSIZE}"
-  CHALLENGETYPE="${__CHALLENGETYPE}"
-  HOOK="${__HOOK}"
-  WELLKNOWN="${__WELLKNOWN}"
-  HOOK_CHAIN="${__HOOK_CHAIN}"
-  OPENSSL_CNF="${__OPENSSL_CNF}"
-  RENEW_DAYS="${__RENEW_DAYS}"
-  IP_VERSION="${__IP_VERSION}"
-}
-
-# verify configuration values
-verify_config() {
-  [[ "${CHALLENGETYPE}" =~ (http-01|dns-01) ]] || _exiterr "Unknown challenge type ${CHALLENGETYPE}... can not continue."
-  if [[ "${CHALLENGETYPE}" = "dns-01" ]] && [[ -z "${HOOK}" ]]; then
-    _exiterr "Challenge type dns-01 needs a hook script for deployment... can not continue."
-  fi
-  if [[ "${CHALLENGETYPE}" = "http-01" && ! -d "${WELLKNOWN}" ]]; then
-    _exiterr "WELLKNOWN directory doesn't exist, please create ${WELLKNOWN} and set appropriate permissions."
-  fi
-  [[ "${KEY_ALGO}" =~ ^(rsa|prime256v1|secp384r1)$ ]] || _exiterr "Unknown public key algorithm ${KEY_ALGO}... can not continue."
-  if [[ -n "${IP_VERSION}" ]]; then
-    [[ "${IP_VERSION}" = "4" || "${IP_VERSION}" = "6" ]] || _exiterr "Unknown IP version ${IP_VERSION}... can not continue."
-  fi
-}
-
-# Setup default config values, search for and load configuration files
-load_config() {
-  # Check for config in various locations
-  if [[ -z "${CONFIG:-}" ]]; then
-    for check_config in "/etc/dehydrated.sh" "/usr/local/etc/dehydrated.sh" "${PWD}" "${SCRIPTDIR}"; do
-      if [[ -f "${check_config}/config" ]]; then
-        BASEDIR="${check_config}"
-        CONFIG="${check_config}/config"
-        break
-      fi
-    done
-  fi
-
-  # Default values
-  CA="https://acme-v01.api.letsencrypt.org/directory"
-  LICENSE="https://letsencrypt.org/documents/LE-SA-v1.1.1-August-1-2016.pdf"
-  CERTDIR=
-  ACCOUNTDIR=
-  CHALLENGETYPE="http-01"
-  CONFIG_D=
-  DOMAINS_D=
-  DOMAINS_TXT=
-  HOOK=
-  HOOK_CHAIN="no"
-  RENEW_DAYS="30"
-  KEYSIZE="4096"
-  WELLKNOWN=
-  PRIVATE_KEY_RENEW="yes"
-  KEY_ALGO=rsa
-  OPENSSL_CNF="$(openssl version -d | cut -d\" -f2)/openssl.cnf"
-  CONTACT_EMAIL=
-  LOCKFILE=
-  OCSP_MUST_STAPLE="no"
-  IP_VERSION=
-
-  if [[ -z "${CONFIG:-}" ]]; then
-    echo "#" >&2
-    echo "# !! WARNING !! No main config file found, using default config!" >&2
-    echo "#" >&2
-  elif [[ -f "${CONFIG}" ]]; then
-    echo "# INFO: Using main config file ${CONFIG}"
-    BASEDIR="$(dirname "${CONFIG}")"
-    # shellcheck disable=SC1090
-    . "${CONFIG}"
-  else
-    _exiterr "Specified config file doesn't exist."
-  fi
-
-  if [[ -n "${CONFIG_D}" ]]; then
-    if [[ ! -d "${CONFIG_D}" ]]; then
-      _exiterr "The path ${CONFIG_D} specified for CONFIG_D does not point to a directory." >&2
-    fi
-
-    for check_config_d in "${CONFIG_D}"/*.sh; do
-      if [[ ! -e "${check_config_d}" ]]; then
-        echo "# !! WARNING !! Extra configuration directory ${CONFIG_D} exists, but no configuration found in it." >&2
-        break
-      elif [[ -f "${check_config_d}" ]] && [[ -r "${check_config_d}" ]]; then
-        echo "# INFO: Using additional config file ${check_config_d}"
-        # shellcheck disable=SC1090
-        . "${check_config_d}"
-      else
-        _exiterr "Specified additional config ${check_config_d} is not readable or not a file at all." >&2
-      fi
-   done
-  fi
-
-  # Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality.
-  BASEDIR="${BASEDIR%%/}"
-
-  # Check BASEDIR and set default variables
-  [[ -d "${BASEDIR}" ]] || _exiterr "BASEDIR does not exist: ${BASEDIR}"
-
-  CAHASH="$(echo "${CA}" | urlbase64)"
-  [[ -z "${ACCOUNTDIR}" ]] && ACCOUNTDIR="${BASEDIR}/accounts"
-  mkdir -p "${ACCOUNTDIR}/${CAHASH}"
-  [[ -f "${ACCOUNTDIR}/${CAHASH}/config" ]] && . "${ACCOUNTDIR}/${CAHASH}/config"
-  ACCOUNT_KEY="${ACCOUNTDIR}/${CAHASH}/account_key.pem"
-  ACCOUNT_KEY_JSON="${ACCOUNTDIR}/${CAHASH}/registration_info.json"
-
-  if [[ -f "${BASEDIR}/private_key.pem" ]] && [[ ! -f "${ACCOUNT_KEY}" ]]; then
-    echo "! Moving private_key.pem to ${ACCOUNT_KEY}"
-    mv "${BASEDIR}/private_key.pem" "${ACCOUNT_KEY}"
-  fi
-  if [[ -f "${BASEDIR}/private_key.json" ]] && [[ ! -f "${ACCOUNT_KEY_JSON}" ]]; then
-    echo "! Moving private_key.json to ${ACCOUNT_KEY_JSON}"
-    mv "${BASEDIR}/private_key.json" "${ACCOUNT_KEY_JSON}"
-  fi
-
-  [[ -z "${CERTDIR}" ]] && CERTDIR="${BASEDIR}/certs"
-  [[ -z "${DOMAINS_TXT}" ]] && DOMAINS_TXT="${BASEDIR}/domains.txt"
-  [[ -z "${WELLKNOWN}" ]] && WELLKNOWN="/var/www/dehydrated"
-  [[ -z "${LOCKFILE}" ]] && LOCKFILE="${BASEDIR}/lock"
-  [[ -n "${PARAM_NO_LOCK:-}" ]] && LOCKFILE=""
-
-  [[ -n "${PARAM_HOOK:-}" ]] && HOOK="${PARAM_HOOK}"
-  [[ -n "${PARAM_CERTDIR:-}" ]] && CERTDIR="${PARAM_CERTDIR}"
-  [[ -n "${PARAM_CHALLENGETYPE:-}" ]] && CHALLENGETYPE="${PARAM_CHALLENGETYPE}"
-  [[ -n "${PARAM_KEY_ALGO:-}" ]] && KEY_ALGO="${PARAM_KEY_ALGO}"
-  [[ -n "${PARAM_OCSP_MUST_STAPLE:-}" ]] && OCSP_MUST_STAPLE="${PARAM_OCSP_MUST_STAPLE}"
-  [[ -n "${PARAM_IP_VERSION:-}" ]] && IP_VERSION="${PARAM_IP_VERSION}"
-
-  verify_config
-  store_configvars
-}
-
-# Initialize system
-init_system() {
-  load_config
-
-  # Lockfile handling (prevents concurrent access)
-  if [[ -n "${LOCKFILE}" ]]; then
-    LOCKDIR="$(dirname "${LOCKFILE}")"
-    [[ -w "${LOCKDIR}" ]] || _exiterr "Directory ${LOCKDIR} for LOCKFILE ${LOCKFILE} is not writable, aborting."
-    ( set -C; date > "${LOCKFILE}" ) 2>/dev/null || _exiterr "Lock file '${LOCKFILE}' present, aborting."
-    remove_lock() { rm -f "${LOCKFILE}"; }
-    trap 'remove_lock' EXIT
-  fi
-
-  # Get CA URLs
-  CA_DIRECTORY="$(http_request get "${CA}")"
-  CA_NEW_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-cert)" &&
-  CA_NEW_AUTHZ="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-authz)" &&
-  CA_NEW_REG="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value new-reg)" &&
-  # shellcheck disable=SC2015
-  CA_REVOKE_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value revoke-cert)" ||
-  _exiterr "Problem retrieving ACME/CA-URLs, check if your configured CA points to the directory entrypoint."
-
-  # Export some environment variables to be used in hook script
-  export WELLKNOWN BASEDIR CERTDIR CONFIG
-
-  # Checking for private key ...
-  register_new_key="no"
-  if [[ -n "${PARAM_ACCOUNT_KEY:-}" ]]; then
-    # a private key was specified from the command line so use it for this run
-    echo "Using private key ${PARAM_ACCOUNT_KEY} instead of account key"
-    ACCOUNT_KEY="${PARAM_ACCOUNT_KEY}"
-    ACCOUNT_KEY_JSON="${PARAM_ACCOUNT_KEY}.json"
-  else
-    # Check if private account key exists, if it doesn't exist yet generate a new one (rsa key)
-    if [[ ! -e "${ACCOUNT_KEY}" ]]; then
-      echo "+ Generating account key..."
-      _openssl genrsa -out "${ACCOUNT_KEY}" "${KEYSIZE}"
-      register_new_key="yes"
-    fi
-  fi
-  openssl rsa -in "${ACCOUNT_KEY}" -check 2>/dev/null > /dev/null || _exiterr "Account key is not valid, can not continue."
-
-  # Get public components from private key and calculate thumbprint
-  pubExponent64="$(printf '%x' "$(openssl rsa -in "${ACCOUNT_KEY}" -noout -text | awk '/publicExponent/ {print $2}')" | hex2bin | urlbase64)"
-  pubMod64="$(openssl rsa -in "${ACCOUNT_KEY}" -noout -modulus | cut -d'=' -f2 | hex2bin | urlbase64)"
-
-  thumbprint="$(printf '{"e":"%s","kty":"RSA","n":"%s"}' "${pubExponent64}" "${pubMod64}" | openssl dgst -sha256 -binary | urlbase64)"
-
-  # If we generated a new private key in the step above we have to register it with the acme-server
-  if [[ "${register_new_key}" = "yes" ]]; then
-    echo "+ Registering account key with ACME server..."
-    [[ ! -z "${CA_NEW_REG}" ]] || _exiterr "Certificate authority doesn't allow registrations."
-    # If an email for the contact has been provided then adding it to the registration request
-    FAILED=false
-    if [[ -n "${CONTACT_EMAIL}" ]]; then
-      (signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"$LICENSE"'"}' > "${ACCOUNT_KEY_JSON}") || FAILED=true
-    else
-      (signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "agreement": "'"$LICENSE"'"}' > "${ACCOUNT_KEY_JSON}") || FAILED=true
-    fi
-    if [[ "${FAILED}" = "true" ]]; then
-      echo
-      echo
-      echo "Error registering account key. See message above for more information."
-      rm "${ACCOUNT_KEY}" "${ACCOUNT_KEY_JSON}"
-      exit 1
-    fi
-  fi
-
-}
-
-# Different sed version for different os types...
-_sed() {
-  if [[ "${OSTYPE}" = "Linux" ]]; then
-    sed -r "${@}"
-  else
-    sed -E "${@}"
-  fi
-}
-
-# Print error message and exit with error
-_exiterr() {
-  echo "ERROR: ${1}" >&2
-  exit 1
-}
-
-# Remove newlines and whitespace from json
-clean_json() {
-  tr -d '\r\n' | _sed -e 's/ +/ /g' -e 's/\{ /{/g' -e 's/ \}/}/g' -e 's/\[ /[/g' -e 's/ \]/]/g'
-}
-
-# Encode data as url-safe formatted base64
-urlbase64() {
-  # urlbase64: base64 encoded string with '+' replaced with '-' and '/' replaced with '_'
-  openssl base64 -e | tr -d '\n\r' | _sed -e 's:=*$::g' -e 'y:+/:-_:'
-}
-
-# Convert hex string to binary data
-hex2bin() {
-  # Remove spaces, add leading zero, escape as hex string and parse with printf
-  printf -- "$(cat | _sed -e 's/[[:space:]]//g' -e 's/^(.(.{2})*)$/0\1/' -e 's/(.{2})/\\x\1/g')"
-}
-
-# Get string value from json dictionary
-get_json_string_value() {
-  local filter
-  filter=$(printf 's/.*"%s": *"\([^"]*\)".*/\\1/p' "$1")
-  sed -n "${filter}"
-}
-
-# OpenSSL writes to stderr/stdout even when there are no errors. So just
-# display the output if the exit code was != 0 to simplify debugging.
-_openssl() {
-  set +e
-  out="$(openssl "${@}" 2>&1)"
-  res=$?
-  set -e
-  if [[ ${res} -ne 0 ]]; then
-    echo "  + ERROR: failed to run $* (Exitcode: ${res})" >&2
-    echo >&2
-    echo "Details:" >&2
-    echo "${out}" >&2
-    echo >&2
-    exit ${res}
-  fi
-}
-
-# Send http(s) request with specified method
-http_request() {
-  tempcont="$(_mktemp)"
-
-  if [[ -n "${IP_VERSION:-}" ]]; then
-      ip_version="-${IP_VERSION}"
-  fi
-
-  set +e
-  if [[ "${1}" = "head" ]]; then
-    statuscode="$(curl ${ip_version:-} -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)"
-    curlret="${?}"
-  elif [[ "${1}" = "get" ]]; then
-    statuscode="$(curl ${ip_version:-} -s -w "%{http_code}" -o "${tempcont}" "${2}")"
-    curlret="${?}"
-  elif [[ "${1}" = "post" ]]; then
-    statuscode="$(curl ${ip_version:-} -s -w "%{http_code}" -o "${tempcont}" "${2}" -d "${3}")"
-    curlret="${?}"
-  else
-    set -e
-    _exiterr "Unknown request method: ${1}"
-  fi
-  set -e
-
-  if [[ ! "${curlret}" = "0" ]]; then
-    _exiterr "Problem connecting to server (${1} for ${2}; curl returned with ${curlret})"
-  fi
-
-  if [[ ! "${statuscode:0:1}" = "2" ]]; then
-    echo "  + ERROR: An error occurred while sending ${1}-request to ${2} (Status ${statuscode})" >&2
-    echo >&2
-    echo "Details:" >&2
-    cat "${tempcont}" >&2
-    echo >&2
-    echo >&2
-    rm -f "${tempcont}"
-
-    # Wait for hook script to clean the challenge if used
-    if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token:+set}" ]]; then
-      "${HOOK}" "clean_challenge" '' "${challenge_token}" "${keyauth}"
-    fi
-
-    # remove temporary domains.txt file if used
-    [[ -n "${PARAM_DOMAIN:-}" && -n "${DOMAINS_TXT:-}" ]] && rm "${DOMAINS_TXT}"
-    exit 1
-  fi
-
-  cat "${tempcont}"
-  rm -f "${tempcont}"
-}
-
-# Send signed request
-signed_request() {
-  # Encode payload as urlbase64
-  payload64="$(printf '%s' "${2}" | urlbase64)"
-
-  # Retrieve nonce from acme-server
-  nonce="$(http_request head "${CA}" | grep Replay-Nonce: | awk -F ': ' '{print $2}' | tr -d '\n\r')"
-
-  # Build header with just our public key and algorithm information
-  header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}'
-
-  # Build another header which also contains the previously received nonce and encode it as urlbase64
-  protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}'
-  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}.${payload64}" | openssl dgst -sha256 -sign "${ACCOUNT_KEY}" | urlbase64)"
-
-  # Send header + extended header + payload + signature to the acme-server
-  data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
-
-  http_request post "${1}" "${data}"
-}
-
-# Extracts all subject names from a CSR
-# Outputs either the CN, or the SANs, one per line
-extract_altnames() {
-  csr="${1}" # the CSR itself (not a file)
-
-  if ! <<<"${csr}" openssl req -verify -noout 2>/dev/null; then
-    _exiterr "Certificate signing request isn't valid"
-  fi
-
-  reqtext="$( <<<"${csr}" openssl req -noout -text )"
-  if <<<"${reqtext}" grep -q '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$'; then
-    # SANs used, extract these
-    altnames="$( <<<"${reqtext}" grep -A1 '^[[:space:]]*X509v3 Subject Alternative Name:[[:space:]]*$' | tail -n1 )"
-    # split to one per line:
-    # shellcheck disable=SC1003
-    altnames="$( <<<"${altnames}" _sed -e 's/^[[:space:]]*//; s/, /\'$'\n''/g' )"
-    # we can only get DNS: ones signed
-    if grep -qv '^DNS:' <<<"${altnames}"; then
-      _exiterr "Certificate signing request contains non-DNS Subject Alternative Names"
-    fi
-    # strip away the DNS: prefix
-    altnames="$( <<<"${altnames}" _sed -e 's/^DNS://' )"
-    echo "${altnames}"
-
-  else
-    # No SANs, extract CN
-    altnames="$( <<<"${reqtext}" grep '^[[:space:]]*Subject:' | _sed -e 's/.* CN=([^ /,]*).*/\1/' )"
-    echo "${altnames}"
-  fi
-}
-
-# Create certificate for domain(s) and outputs it FD 3
-sign_csr() {
-  csr="${1}" # the CSR itself (not a file)
-
-  if { true >&3; } 2>/dev/null; then
-    : # fd 3 looks OK
-  else
-    _exiterr "sign_csr: FD 3 not open"
-  fi
-
-  shift 1 || true
-  altnames="${*:-}"
-  if [ -z "${altnames}" ]; then
-    altnames="$( extract_altnames "${csr}" )"
-  fi
-
-  if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
-    _exiterr "Certificate authority doesn't allow certificate signing"
-  fi
-
-  local idx=0
-  if [[ -n "${ZSH_VERSION:-}" ]]; then
-    local -A challenge_uris challenge_tokens keyauths deploy_args
-  else
-    local -a challenge_uris challenge_tokens keyauths deploy_args
-  fi
-
-  # Request 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 ${altname}..."
-    response="$(signed_request "${CA_NEW_AUTHZ}" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${altname}"'"}}' | clean_json)"
-
-    challenges="$(printf '%s\n' "${response}" | sed -n 's/.*\("challenges":[^\[]*\[[^]]*]\).*/\1/p')"
-    repl=$'\n''{' # fix syntax highlighting in Vim
-    challenge="$(printf "%s" "${challenges//\{/${repl}}" | grep \""${CHALLENGETYPE}"\")"
-    challenge_token="$(printf '%s' "${challenge}" | get_json_string_value token | _sed 's/[^A-Za-z0-9_\-]/_/g')"
-    challenge_uri="$(printf '%s' "${challenge}" | get_json_string_value uri)"
-
-    if [[ -z "${challenge_token}" ]] || [[ -z "${challenge_uri}" ]]; then
-      _exiterr "Can't retrieve challenges (${response})"
-    fi
-
-    # Challenge response consists of the challenge token and the thumbprint of our public certificate
-    keyauth="${challenge_token}.${thumbprint}"
-
-    case "${CHALLENGETYPE}" in
-      "http-01")
-        # Store challenge response in well-known location and make world-readable (so that a webserver can access it)
-        printf '%s' "${keyauth}" > "${WELLKNOWN}/${challenge_token}"
-        chmod a+r "${WELLKNOWN}/${challenge_token}"
-        keyauth_hook="${keyauth}"
-        ;;
-      "dns-01")
-        # Generate DNS entry content for dns-01 validation
-        keyauth_hook="$(printf '%s' "${keyauth}" | openssl dgst -sha256 -binary | urlbase64)"
-        ;;
-    esac
-
-    challenge_uris[${idx}]="${challenge_uri}"
-    keyauths[${idx}]="${keyauth}"
-    challenge_tokens[${idx}]="${challenge_token}"
-    # Note: assumes args will never have spaces!
-    deploy_args[${idx}]="${altname} ${challenge_token} ${keyauth_hook}"
-    idx=$((idx+1))
-  done
-
-  # Wait for hook script to deploy the challenges if used
-  # shellcheck disable=SC2068
-  [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[@]}
-
-  # Respond to challenges
-  idx=0
-  for altname in ${altnames}; do
-    challenge_token="${challenge_tokens[${idx}]}"
-    keyauth="${keyauths[${idx}]}"
-
-    # Wait for hook script to deploy the challenge if used
-    # shellcheck disable=SC2086
-    [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && "${HOOK}" "deploy_challenge" ${deploy_args[${idx}]}
-
-    # Ask the acme-server to verify our challenge and wait until it is no longer pending
-    echo " + Responding to challenge for ${altname}..."
-    result="$(signed_request "${challenge_uris[${idx}]}" '{"resource": "challenge", "keyAuthorization": "'"${keyauth}"'"}' | clean_json)"
-
-    reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
-
-    while [[ "${reqstatus}" = "pending" ]]; do
-      sleep 1
-      result="$(http_request get "${challenge_uris[${idx}]}")"
-      reqstatus="$(printf '%s\n' "${result}" | get_json_string_value status)"
-    done
-
-    [[ "${CHALLENGETYPE}" = "http-01" ]] && rm -f "${WELLKNOWN}/${challenge_token}"
-
-    # Wait for hook script to clean the challenge if used
-    if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && [[ -n "${challenge_token}" ]]; then
-      # shellcheck disable=SC2086
-      "${HOOK}" "clean_challenge" ${deploy_args[${idx}]}
-    fi
-    idx=$((idx+1))
-
-    if [[ "${reqstatus}" = "valid" ]]; then
-      echo " + Challenge is valid!"
-    else
-      break
-    fi
-  done
-
-  # Wait for hook script to clean the challenges if used
-  # shellcheck disable=SC2068
-  [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "clean_challenge" ${deploy_args[@]}
-
-  if [[ "${reqstatus}" != "valid" ]]; then
-    # Clean up any remaining challenge_tokens if we stopped early
-    if [[ "${CHALLENGETYPE}" = "http-01" ]]; then
-      while [ ${idx} -lt ${#challenge_tokens[@]} ]; do
-        rm -f "${WELLKNOWN}/${challenge_tokens[${idx}]}"
-        idx=$((idx+1))
-      done
-    fi
-
-    _exiterr "Challenge is invalid! (returned: ${reqstatus}) (result: ${result})"
-  fi
-
-  # Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem
-  echo " + Requesting certificate..."
-  csr64="$( <<<"${csr}" openssl req -outform DER | urlbase64)"
-  crt64="$(signed_request "${CA_NEW_CERT}" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | openssl base64 -e)"
-  crt="$( printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" )"
-
-  # Try to load the certificate to detect corruption
-  echo " + Checking certificate..."
-  _openssl x509 -text <<<"${crt}"
-
-  echo "${crt}" >&3
-
-  unset challenge_token
-  echo " + Done!"
-}
-
-# Create certificate for domain(s)
-sign_domain() {
-  domain="${1}"
-  altnames="${*}"
-  timestamp="$(date +%s)"
-
-  echo " + Signing domains..."
-  if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
-    _exiterr "Certificate authority doesn't allow certificate signing"
-  fi
-
-  # If there is no existing certificate directory => make it
-  if [[ ! -e "${CERTDIR}/${domain}" ]]; then
-    echo " + Creating new directory ${CERTDIR}/${domain} ..."
-    mkdir -p "${CERTDIR}/${domain}" || _exiterr "Unable to create directory ${CERTDIR}/${domain}"
-  fi
-
-  privkey="privkey.pem"
-  # generate a new private key if we need or want one
-  if [[ ! -r "${CERTDIR}/${domain}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
-    echo " + Generating private key..."
-    privkey="privkey-${timestamp}.pem"
-    case "${KEY_ALGO}" in
-      rsa) _openssl genrsa -out "${CERTDIR}/${domain}/privkey-${timestamp}.pem" "${KEYSIZE}";;
-      prime256v1|secp384r1) _openssl ecparam -genkey -name "${KEY_ALGO}" -out "${CERTDIR}/${domain}/privkey-${timestamp}.pem";;
-    esac
-  fi
-
-  # Generate signing request config and the actual signing request
-  echo " + Generating signing request..."
-  SAN=""
-  for altname in ${altnames}; do
-    SAN+="DNS:${altname}, "
-  done
-  SAN="${SAN%%, }"
-  local tmp_openssl_cnf
-  tmp_openssl_cnf="$(_mktemp)"
-  cat "${OPENSSL_CNF}" > "${tmp_openssl_cnf}"
-  printf "[SAN]\nsubjectAltName=%s" "${SAN}" >> "${tmp_openssl_cnf}"
-  if [ "${OCSP_MUST_STAPLE}" = "yes" ]; then
-    printf "\n1.3.6.1.5.5.7.1.24=DER:30:03:02:01:05" >> "${tmp_openssl_cnf}"
-  fi
-  openssl req -new -sha256 -key "${CERTDIR}/${domain}/${privkey}" -out "${CERTDIR}/${domain}/cert-${timestamp}.csr" -subj "/CN=${domain}/" -reqexts SAN -config "${tmp_openssl_cnf}"
-  rm -f "${tmp_openssl_cnf}"
-
-  crt_path="${CERTDIR}/${domain}/cert-${timestamp}.pem"
-  # shellcheck disable=SC2086
-  sign_csr "$(< "${CERTDIR}/${domain}/cert-${timestamp}.csr" )" ${altnames} 3>"${crt_path}"
-
-  # Create fullchain.pem
-  echo " + Creating fullchain.pem..."
-  cat "${crt_path}" > "${CERTDIR}/${domain}/fullchain-${timestamp}.pem"
-  http_request get "$(openssl x509 -in "${CERTDIR}/${domain}/cert-${timestamp}.pem" -noout -text | grep 'CA Issuers - URI:' | cut -d':' -f2-)" > "${CERTDIR}/${domain}/chain-${timestamp}.pem"
-  if ! grep -q "BEGIN CERTIFICATE" "${CERTDIR}/${domain}/chain-${timestamp}.pem"; then
-    openssl x509 -in "${CERTDIR}/${domain}/chain-${timestamp}.pem" -inform DER -out "${CERTDIR}/${domain}/chain-${timestamp}.pem" -outform PEM
-  fi
-  cat "${CERTDIR}/${domain}/chain-${timestamp}.pem" >> "${CERTDIR}/${domain}/fullchain-${timestamp}.pem"
-
-  # Update symlinks
-  [[ "${privkey}" = "privkey.pem" ]] || ln -sf "privkey-${timestamp}.pem" "${CERTDIR}/${domain}/privkey.pem"
-
-  ln -sf "chain-${timestamp}.pem" "${CERTDIR}/${domain}/chain.pem"
-  ln -sf "fullchain-${timestamp}.pem" "${CERTDIR}/${domain}/fullchain.pem"
-  ln -sf "cert-${timestamp}.csr" "${CERTDIR}/${domain}/cert.csr"
-  ln -sf "cert-${timestamp}.pem" "${CERTDIR}/${domain}/cert.pem"
-
-  # Wait for hook script to clean the challenge and to deploy cert if used
-  export KEY_ALGO
-  [[ -n "${HOOK}" ]] && "${HOOK}" "deploy_cert" "${domain}" "${CERTDIR}/${domain}/privkey.pem" "${CERTDIR}/${domain}/cert.pem" "${CERTDIR}/${domain}/fullchain.pem" "${CERTDIR}/${domain}/chain.pem" "${timestamp}"
-
-  unset challenge_token
-  echo " + Done!"
-}
-
-# Usage: --cron (-c)
-# Description: Sign/renew non-existant/changed/expiring certificates.
-command_sign_domains() {
-  init_system
-
-  if [[ -n "${PARAM_DOMAIN:-}" ]]; then
-    DOMAINS_TXT="$(_mktemp)"
-    printf -- "${PARAM_DOMAIN}" > "${DOMAINS_TXT}"
-  elif [[ -e "${DOMAINS_TXT}" ]]; then
-    if [[ ! -r "${DOMAINS_TXT}" ]]; then
-      _exiterr "domains.txt found but not readable"
-    fi
-  else
-    _exiterr "domains.txt not found and --domain not given"
-  fi
-
-  # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire
-  ORIGIFS="${IFS}"
-  IFS=$'\n'
-  for line in $(<"${DOMAINS_TXT}" tr -d '\r' | tr '[:upper:]' '[:lower:]' | _sed -e 's/^[[:space:]]*//g' -e 's/[[:space:]]*$//g' -e 's/[[:space:]]+/ /g' | (grep -vE '^(#|$)' || true)); do
-    reset_configvars
-    IFS="${ORIGIFS}"
-    domain="$(printf '%s\n' "${line}" | cut -d' ' -f1)"
-    morenames="$(printf '%s\n' "${line}" | cut -s -d' ' -f2-)"
-    cert="${CERTDIR}/${domain}/cert.pem"
-
-    force_renew="${PARAM_FORCE:-no}"
-
-    if [[ -z "${morenames}" ]];then
-      echo "Processing ${domain}"
-    else
-      echo "Processing ${domain} with alternative names: ${morenames}"
-    fi
-
-    # read cert config
-    # for now this loads the certificate specific config in a subshell and parses a diff of set variables.
-    # we could just source the config file but i decided to go this way to protect people from accidentally overriding
-    # variables used internally by this script itself.
-    if [[ -n "${DOMAINS_D}" ]]; then
-      certconfig="${DOMAINS_D}/${domain}"
-    else
-      certconfig="${CERTDIR}/${domain}/config"
-    fi
-
-    if [ -f "${certconfig}" ]; then
-      echo " + Using certificate specific config file!"
-      ORIGIFS="${IFS}"
-      IFS=$'\n'
-      for cfgline in $(
-        beforevars="$(_mktemp)"
-        aftervars="$(_mktemp)"
-        set > "${beforevars}"
-        # shellcheck disable=SC1090
-        . "${certconfig}"
-        set > "${aftervars}"
-        diff -u "${beforevars}" "${aftervars}" | grep -E '^\+[^+]'
-        rm "${beforevars}"
-        rm "${aftervars}"
-      ); do
-        config_var="$(echo "${cfgline:1}" | cut -d'=' -f1)"
-        config_value="$(echo "${cfgline:1}" | cut -d'=' -f2-)"
-        case "${config_var}" in
-          KEY_ALGO|OCSP_MUST_STAPLE|PRIVATE_KEY_RENEW|KEYSIZE|CHALLENGETYPE|HOOK|WELLKNOWN|HOOK_CHAIN|OPENSSL_CNF|RENEW_DAYS)
-            echo "   + ${config_var} = ${config_value}"
-            declare -- "${config_var}=${config_value}"
-            ;;
-          _) ;;
-          *) echo "   ! Setting ${config_var} on a per-certificate base is not (yet) supported"
-        esac
-      done
-      IFS="${ORIGIFS}"
-    fi
-    verify_config
-
-    if [[ -e "${cert}" ]]; then
-      printf " + Checking domain name(s) of existing cert..."
-
-      certnames="$(openssl x509 -in "${cert}" -text -noout | grep DNS: | _sed 's/DNS://g' | tr -d ' ' | tr ',' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//')"
-      givennames="$(echo "${domain}" "${morenames}"| tr ' ' '\n' | sort -u | tr '\n' ' ' | _sed 's/ $//' | _sed 's/^ //')"
-
-      if [[ "${certnames}" = "${givennames}" ]]; then
-        echo " unchanged."
-      else
-        echo " changed!"
-        echo " + Domain name(s) are not matching!"
-        echo " + Names in old certificate: ${certnames}"
-        echo " + Configured names: ${givennames}"
-        echo " + Forcing renew."
-        force_renew="yes"
-      fi
-    fi
-
-    if [[ -e "${cert}" ]]; then
-      echo " + Checking expire date of existing cert..."
-      valid="$(openssl x509 -enddate -noout -in "${cert}" | cut -d= -f2- )"
-
-      printf " + Valid till %s " "${valid}"
-      if openssl x509 -checkend $((RENEW_DAYS * 86400)) -noout -in "${cert}"; then
-        printf "(Longer than %d days). " "${RENEW_DAYS}"
-        if [[ "${force_renew}" = "yes" ]]; then
-          echo "Ignoring because renew was forced!"
-        else
-          # Certificate-Names unchanged and cert is still valid
-          echo "Skipping renew!"
-          [[ -n "${HOOK}" ]] && "${HOOK}" "unchanged_cert" "${domain}" "${CERTDIR}/${domain}/privkey.pem" "${CERTDIR}/${domain}/cert.pem" "${CERTDIR}/${domain}/fullchain.pem" "${CERTDIR}/${domain}/chain.pem"
-          continue
-        fi
-      else
-        echo "(Less than ${RENEW_DAYS} days). Renewing!"
-      fi
-    fi
-
-    # shellcheck disable=SC2086
-    if [[ "${PARAM_KEEP_GOING:-}" = "yes" ]]; then
-      sign_domain ${line} &
-      wait $! || true
-    else
-      sign_domain ${line}
-    fi
-  done
-
-  # remove temporary domains.txt file if used
-  [[ -n "${PARAM_DOMAIN:-}" ]] && rm -f "${DOMAINS_TXT}"
-
-  exit 0
-}
-
-# Usage: --signcsr (-s) path/to/csr.pem
-# Description: Sign a given CSR, output CRT on stdout (advanced usage)
-command_sign_csr() {
-  # redirect stdout to stderr
-  # leave stdout over at fd 3 to output the cert
-  exec 3>&1 1>&2
-
-  init_system
-
-  csrfile="${1}"
-  if [ ! -r "${csrfile}" ]; then
-    _exiterr "Could not read certificate signing request ${csrfile}"
-  fi
-
-  # gen cert
-  certfile="$(_mktemp)"
-  sign_csr "$(< "${csrfile}" )" 3> "${certfile}"
-
-  # print cert
-  echo "# CERT #" >&3
-  cat "${certfile}" >&3
-  echo >&3
-
-  # print chain
-  if [ -n "${PARAM_FULL_CHAIN:-}" ]; then
-    # get and convert ca cert
-    chainfile="$(_mktemp)"
-    http_request get "$(openssl x509 -in "${certfile}" -noout -text | grep 'CA Issuers - URI:' | cut -d':' -f2-)" > "${chainfile}"
-
-    if ! grep -q "BEGIN CERTIFICATE" "${chainfile}"; then
-      openssl x509 -inform DER -in "${chainfile}" -outform PEM -out "${chainfile}"
-    fi
-
-    echo "# CHAIN #" >&3
-    cat "${chainfile}" >&3
-
-    rm "${chainfile}"
-  fi
-
-  # cleanup
-  rm "${certfile}"
-
-  exit 0
-}
-
-# Usage: --revoke (-r) path/to/cert.pem
-# Description: Revoke specified certificate
-command_revoke() {
-  init_system
-
-  [[ -n "${CA_REVOKE_CERT}" ]] || _exiterr "Certificate authority doesn't allow certificate revocation."
-
-  cert="${1}"
-  if [[ -L "${cert}" ]]; then
-    # follow symlink and use real certificate name (so we move the real file and not the symlink at the end)
-    local link_target
-    link_target="$(readlink -n "${cert}")"
-    if [[ "${link_target}" =~ ^/ ]]; then
-      cert="${link_target}"
-    else
-      cert="$(dirname "${cert}")/${link_target}"
-    fi
-  fi
-  [[ -f "${cert}" ]] || _exiterr "Could not find certificate ${cert}"
-
-  echo "Revoking ${cert}"
-
-  cert64="$(openssl x509 -in "${cert}" -inform PEM -outform DER | urlbase64)"
-  response="$(signed_request "${CA_REVOKE_CERT}" '{"resource": "revoke-cert", "certificate": "'"${cert64}"'"}' | clean_json)"
-  # 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 " + Done."
-  echo " + Renaming certificate to ${cert}-revoked"
-  mv -f "${cert}" "${cert}-revoked"
-}
-
-# Usage: --cleanup (-gc)
-# Description: Move unused certificate files to archive directory
-command_cleanup() {
-  load_config
-
-  # Create global archive directory if not existant
-  if [[ ! -e "${BASEDIR}/archive" ]]; then
-    mkdir "${BASEDIR}/archive"
-  fi
-
-  # Loop over all certificate directories
-  for certdir in "${CERTDIR}/"*; do
-    # Skip if entry is not a folder
-    [[ -d "${certdir}" ]] || continue
-
-    # Get certificate name
-    certname="$(basename "${certdir}")"
-
-    # Create certitifaces archive directory if not existant
-    archivedir="${BASEDIR}/archive/${certname}"
-    if [[ ! -e "${archivedir}" ]]; then
-      mkdir "${archivedir}"
-    fi
-
-    # Loop over file-types (certificates, keys, signing-requests, ...)
-    for filetype in cert.csr cert.pem chain.pem fullchain.pem privkey.pem; do
-      # Skip if symlink is broken
-      [[ -r "${certdir}/${filetype}" ]] || continue
-
-      # Look up current file in use
-      current="$(basename "$(readlink "${certdir}/${filetype}")")"
-
-      # Split filetype into name and extension
-      filebase="$(echo "${filetype}" | cut -d. -f1)"
-      fileext="$(echo "${filetype}" | cut -d. -f2)"
-
-      # Loop over all files of this type
-      for file in "${certdir}/${filebase}-"*".${fileext}"; do
-        # Handle case where no files match the wildcard
-        [[ -f "${file}" ]] || break
-
-        # Check if current file is in use, if unused move to archive directory
-        filename="$(basename "${file}")"
-        if [[ ! "${filename}" = "${current}" ]]; then
-          echo "Moving unused file to archive directory: ${certname}/${filename}"
-          mv "${certdir}/${filename}" "${archivedir}/${filename}"
-        fi
-      done
-    done
-  done
-
-  exit 0
-}
-
-# Usage: --help (-h)
-# Description: Show help text
-command_help() {
-  printf "Usage: %s [-h] [command [argument]] [parameter [argument]] [parameter [argument]] ...\n\n" "${0}"
-  printf "Default command: help\n\n"
-  echo "Commands:"
-  grep -e '^[[:space:]]*# Usage:' -e '^[[:space:]]*# Description:' -e '^command_.*()[[:space:]]*{' "${0}" | while read -r usage; read -r description; read -r command; do
-    if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]] || [[ ! "${command}" =~ ^command_ ]]; then
-      _exiterr "Error generating help text."
-    fi
-    printf " %-32s %s\n" "${usage##"# Usage: "}" "${description##"# Description: "}"
-  done
-  printf -- "\nParameters:\n"
-  grep -E -e '^[[:space:]]*# PARAM_Usage:' -e '^[[:space:]]*# PARAM_Description:' "${0}" | while read -r usage; read -r description; do
-    if [[ ! "${usage}" =~ Usage ]] || [[ ! "${description}" =~ Description ]]; then
-      _exiterr "Error generating help text."
-    fi
-    printf " %-32s %s\n" "${usage##"# PARAM_Usage: "}" "${description##"# PARAM_Description: "}"
-  done
-}
-
-# Usage: --env (-e)
-# Description: Output configuration variables for use in other scripts
-command_env() {
-  echo "# dehydrated.sh configuration"
-  load_config
-  typeset -p CA LICENSE CERTDIR CHALLENGETYPE DOMAINS_D DOMAINS_TXT HOOK HOOK_CHAIN RENEW_DAYS ACCOUNT_KEY ACCOUNT_KEY_JSON KEYSIZE WELLKNOWN PRIVATE_KEY_RENEW OPENSSL_CNF CONTACT_EMAIL LOCKFILE
-}
-
-# Main method (parses script arguments and calls command_* methods)
-main() {
-  COMMAND=""
-  set_command() {
-    [[ -z "${COMMAND}" ]] || _exiterr "Only one command can be executed at a time. See help (-h) for more information."
-    COMMAND="${1}"
-  }
-
-  check_parameters() {
-    if [[ -z "${1:-}" ]]; then
-      echo "The specified command requires additional parameters. See help:" >&2
-      echo >&2
-      command_help >&2
-      exit 1
-    elif [[ "${1:0:1}" = "-" ]]; then
-      _exiterr "Invalid argument: ${1}"
-    fi
-  }
-
-  [[ -z "${@}" ]] && eval set -- "--help"
-
-  while (( ${#} )); do
-    case "${1}" in
-      --help|-h)
-        command_help
-        exit 0
-        ;;
-
-      --env|-e)
-        set_command env
-        ;;
-
-      --cron|-c)
-        set_command sign_domains
-        ;;
-
-      --signcsr|-s)
-        shift 1
-        set_command sign_csr
-        check_parameters "${1:-}"
-        PARAM_CSR="${1}"
-        ;;
-
-      --revoke|-r)
-        shift 1
-        set_command revoke
-        check_parameters "${1:-}"
-        PARAM_REVOKECERT="${1}"
-        ;;
-
-      --cleanup|-gc)
-        set_command cleanup
-        ;;
-
-      # PARAM_Usage: --full-chain (-fc)
-      # PARAM_Description: Print full chain when using --signcsr
-      --full-chain|-fc)
-        PARAM_FULL_CHAIN="1"
-        ;;
-
-      # PARAM_Usage: --ipv4 (-4)
-      # PARAM_Description: Resolve names to IPv4 addresses only
-      --ipv4|-4)
-        PARAM_IP_VERSION="4"
-        ;;
-
-      # PARAM_Usage: --ipv6 (-6)
-      # PARAM_Description: Resolve names to IPv6 addresses only
-      --ipv6|-6)
-        PARAM_IP_VERSION="6"
-        ;;
-
-      # PARAM_Usage: --domain (-d) domain.tld
-      # PARAM_Description: Use specified domain name(s) instead of domains.txt entry (one certificate!)
-      --domain|-d)
-        shift 1
-        check_parameters "${1:-}"
-        if [[ -z "${PARAM_DOMAIN:-}" ]]; then
-          PARAM_DOMAIN="${1}"
-        else
-          PARAM_DOMAIN="${PARAM_DOMAIN} ${1}"
-         fi
-        ;;
-
-      # PARAM_Usage: --keep-going (-g)
-      # PARAM_Description: Keep going after encountering an error while creating/renewing multiple certificates in cron mode
-      --keep-going|-g)
-        PARAM_KEEP_GOING="yes"
-        ;;
-
-      # PARAM_Usage: --force (-x)
-      # PARAM_Description: Force renew of certificate even if it is longer valid than value in RENEW_DAYS
-      --force|-x)
-        PARAM_FORCE="yes"
-        ;;
-
-      # PARAM_Usage: --no-lock (-n)
-      # PARAM_Description: Don't use lockfile (potentially dangerous!)
-      --no-lock|-n)
-        PARAM_NO_LOCK="yes"
-        ;;
-
-      # PARAM_Usage: --ocsp
-      # PARAM_Description: Sets option in CSR indicating OCSP stapling to be mandatory
-      --ocsp)
-        PARAM_OCSP_MUST_STAPLE="yes"
-        ;;
-
-      # PARAM_Usage: --privkey (-p) path/to/key.pem
-      # PARAM_Description: Use specified private key instead of account key (useful for revocation)
-      --privkey|-p)
-        shift 1
-        check_parameters "${1:-}"
-        PARAM_ACCOUNT_KEY="${1}"
-        ;;
-
-      # PARAM_Usage: --config (-f) path/to/config
-      # PARAM_Description: Use specified config file
-      --config|-f)
-        shift 1
-        check_parameters "${1:-}"
-        CONFIG="${1}"
-        ;;
-
-      # PARAM_Usage: --hook (-k) path/to/hook.sh
-      # PARAM_Description: Use specified script for hooks
-      --hook|-k)
-        shift 1
-        check_parameters "${1:-}"
-        PARAM_HOOK="${1}"
-        ;;
-
-      # PARAM_Usage: --out (-o) certs/directory
-      # PARAM_Description: Output certificates into the specified directory
-      --out|-o)
-        shift 1
-        check_parameters "${1:-}"
-        PARAM_CERTDIR="${1}"
-        ;;
-
-      # PARAM_Usage: --challenge (-t) http-01|dns-01
-      # PARAM_Description: Which challenge should be used? Currently http-01 and dns-01 are supported
-      --challenge|-t)
-        shift 1
-        check_parameters "${1:-}"
-        PARAM_CHALLENGETYPE="${1}"
-        ;;
-
-      # PARAM_Usage: --algo (-a) rsa|prime256v1|secp384r1
-      # PARAM_Description: Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
-      --algo|-a)
-        shift 1
-        check_parameters "${1:-}"
-        PARAM_KEY_ALGO="${1}"
-        ;;
-
-      *)
-        echo "Unknown parameter detected: ${1}" >&2
-        echo >&2
-        command_help >&2
-        exit 1
-        ;;
-    esac
-
-    shift 1
-  done
-
-  case "${COMMAND}" in
-    env) command_env;;
-    sign_domains) command_sign_domains;;
-    sign_csr) command_sign_csr "${PARAM_CSR}";;
-    revoke) command_revoke "${PARAM_REVOKECERT}";;
-    cleanup) command_cleanup;;
-    *) command_help; exit 1;;
-  esac
-}
-
-# Determine OS type
-OSTYPE="$(uname)"
-
-# Check for missing dependencies
-check_dependencies
-
-# Run script
-main "${@:-}"
diff --git a/docs/domains_txt.md b/docs/domains_txt.md
index ed6b453..d8110fe 100644
--- a/docs/domains_txt.md
+++ b/docs/domains_txt.md
@@ -1,6 +1,6 @@
 ### domains.txt
 
-dehydrated.sh uses the file `domains.txt` as configuration for which certificates should be requested.
+dehydrated uses the file `domains.txt` as configuration for which certificates should be requested.
 
 The file should have the following format:
 
diff --git a/docs/examples/config b/docs/examples/config
index 96a2161..17621d2 100644
--- a/docs/examples/config
+++ b/docs/examples/config
@@ -1,5 +1,5 @@
 ########################################################
-# This is the main config file for dehydrated.sh       #
+# This is the main config file for dehydrated          #
 #                                                      #
 # This file is looked for in the following locations:  #
 # $SCRIPTDIR/config (next to this script)              #
diff --git a/docs/per-certificate-config.md b/docs/per-certificate-config.md
index 708346e..9e1b25a 100644
--- a/docs/per-certificate-config.md
+++ b/docs/per-certificate-config.md
@@ -1,6 +1,6 @@
 # Config on per-certificate base
 
-dehydrated.sh allows a few configuration variables to be set on a per-certificate base.
+dehydrated allows a few configuration variables to be set on a per-certificate base.
 
 To use this feature create a `config` file in the certificates output directory (e.g. `certs/example.org/config`).
 
diff --git a/docs/troubleshooting.md b/docs/troubleshooting.md
index ec50571..4823fe9 100644
--- a/docs/troubleshooting.md
+++ b/docs/troubleshooting.md
@@ -6,7 +6,7 @@ Generally if the following information doesn't provide a solution to your proble
 
 You probably changed from staging-CA to production-CA (or the other way).
 
-Currently dehydrated.sh doesn't detect a missing registration on the selected CA,
+Currently dehydrated doesn't detect a missing registration on the selected CA,
 the current workaround is to move `private_key.pem` (and, if you care, `private_key.json`) out of the way so the scripts generates and registers a new one.
 
 This will hopefully be fixed in the future.
@@ -19,7 +19,7 @@ LICENSE1 and LICENSE2 are just placeholders for the real values in this troubles
 
 ## "Error creating new cert :: Too many certificates already issued for: [...]"
 
-This is not an issue with dehydrated.sh but an API limit with boulder (the ACME server).
+This is not an issue with dehydrated but an API limit with boulder (the ACME server).
 
 At the time of writing this you can only create 5 certificates per domain in a sliding window of 7 days.
 
diff --git a/docs/wellknown.md b/docs/wellknown.md
index 4456181..e29c487 100644
--- a/docs/wellknown.md
+++ b/docs/wellknown.md
@@ -5,7 +5,7 @@ It will do that for any (sub-)domain you want to sign a certificate for.
 
 At the moment you'll need to have that location available over normal HTTP on port 80 (redirect to HTTPS will work, but starting point is always HTTP!).
 
-dehydrated.sh has a config variable called `WELLKNOWN`, which corresponds to the directory which should be served under `/.well-known/acme-challenge` on your domain. So in the above example the token would have been saved as `$WELLKNOWN/m4g1C-t0k3n`.
+dehydrated has a config variable called `WELLKNOWN`, which corresponds to the directory which should be served under `/.well-known/acme-challenge` on your domain. So in the above example the token would have been saved as `$WELLKNOWN/m4g1C-t0k3n`.
 
 If you only have one docroot on your server you could easily do something like `WELLKNOWN=/var/www/.well-known/acme-challenge`, for anything else look at the example below.
 
diff --git a/test.sh b/test.sh
index 93ddb50..430dd1d 100755
--- a/test.sh
+++ b/test.sh
@@ -84,7 +84,7 @@ TMP_URL="$(grep -Eo "Hostname:[a-z0-9]+.ngrok.io" tmp.log | head -1 | cut -d':'
 TMP2_URL="$(grep -Eo "Hostname:[a-z0-9]+.ngrok.io" tmp2.log | head -1 | cut -d':' -f2)"
 TMP3_URL="$(grep -Eo "Hostname:[a-z0-9]+.ngrok.io" tmp3.log | head -1 | cut -d':' -f2)"
 if [[ -z "${TMP_URL}" ]] || [[ -z "${TMP2_URL}" ]] || [[ -z "${TMP3_URL}" ]]; then
-  echo "Couldn't get an url from ngrok, not a dehydrated.sh bug, tests can't continue."
+  echo "Couldn't get an url from ngrok, not a dehydrated bug, tests can't continue."
   exit 1
 fi
 
@@ -104,7 +104,7 @@ touch domains.txt
 
 # Check if help command is working
 _TEST "Checking if help command is working..."
-./dehydrated.sh --help > tmplog 2> errorlog || _FAIL "Script execution failed"
+./dehydrated --help > tmplog 2> errorlog || _FAIL "Script execution failed"
 _CHECK_LOG "Default command: help"
 _CHECK_LOG "--help (-h)"
 _CHECK_LOG "--domain (-d) domain.tld"
@@ -112,7 +112,7 @@ _CHECK_ERRORLOG
 
 # Run in cron mode with empty domains.txt (should only generate private key and exit)
 _TEST "First run in cron mode, checking if private key is generated and registered"
-./dehydrated.sh --cron > tmplog 2> errorlog || _FAIL "Script execution failed"
+./dehydrated --cron > tmplog 2> errorlog || _FAIL "Script execution failed"
 _CHECK_LOG "Registering account key"
 _CHECK_FILE accounts/*/account_key.pem
 _CHECK_ERRORLOG
@@ -120,7 +120,7 @@ _CHECK_ERRORLOG
 # Temporarily move config out of the way and try signing certificate by using temporary config location
 _TEST "Try signing using temporary config location and with domain as command line parameter"
 mv config tmp_config
-./dehydrated.sh --cron --domain "${TMP_URL}" --domain "${TMP2_URL}" -f tmp_config > tmplog 2> errorlog || _FAIL "Script execution failed"
+./dehydrated --cron --domain "${TMP_URL}" --domain "${TMP2_URL}" -f tmp_config > tmplog 2> errorlog || _FAIL "Script execution failed"
 _CHECK_NOT_LOG "Checking domain name(s) of existing cert"
 _CHECK_LOG "Generating private key"
 _CHECK_LOG "Requesting challenge for ${TMP_URL}"
@@ -133,7 +133,7 @@ mv tmp_config config
 
 # Add third domain to command-lime, should force renewal.
 _TEST "Run in cron mode again, this time adding third domain, should force renewal."
-./dehydrated.sh --cron --domain "${TMP_URL}" --domain "${TMP2_URL}" --domain "${TMP3_URL}" > tmplog 2> errorlog || _FAIL "Script execution failed"
+./dehydrated --cron --domain "${TMP_URL}" --domain "${TMP2_URL}" --domain "${TMP3_URL}" > tmplog 2> errorlog || _FAIL "Script execution failed"
 _CHECK_LOG "Domain name(s) are not matching!"
 _CHECK_LOG "Forcing renew."
 _CHECK_LOG "Generating private key"
@@ -151,7 +151,7 @@ echo "${TMP_URL} ${TMP2_URL} $(tr 'a-z' 'A-Z' <<<"${TMP3_URL}")" >> domains.txt
 
 # Run in cron mode again (should find a non-expiring certificate and do nothing)
 _TEST "Run in cron mode again, this time with domain in domains.txt, should find non-expiring certificate"
-./dehydrated.sh --cron > tmplog 2> errorlog || _FAIL "Script execution failed"
+./dehydrated --cron > tmplog 2> errorlog || _FAIL "Script execution failed"
 _CHECK_LOG "Checking domain name(s) of existing cert... unchanged."
 _CHECK_LOG "Skipping renew"
 _CHECK_ERRORLOG
@@ -161,7 +161,7 @@ echo 'PRIVATE_KEY_RENEW="no"' >> config
 
 # Run in cron mode one last time, with domain in domains.txt and force-resign (should find certificate, resign anyway, and not generate private key)
 _TEST "Run in cron mode one last time, with domain in domains.txt and force-resign"
-./dehydrated.sh --cron --force > tmplog 2> errorlog || _FAIL "Script execution failed"
+./dehydrated --cron --force > tmplog 2> errorlog || _FAIL "Script execution failed"
 _CHECK_LOG "Checking domain name(s) of existing cert... unchanged."
 _CHECK_LOG "Ignoring because renew was forced!"
 _CHECK_NOT_LOG "Generating private key"
@@ -175,7 +175,7 @@ _CHECK_ERRORLOG
 
 # Check if signcsr command is working
 _TEST "Running signcsr command"
-./dehydrated.sh --signcsr certs/${TMP_URL}/cert.csr > tmplog 2> errorlog || _FAIL "Script execution failed"
+./dehydrated --signcsr certs/${TMP_URL}/cert.csr > tmplog 2> errorlog || _FAIL "Script execution failed"
 _CHECK_LOG "BEGIN CERTIFICATE"
 _CHECK_LOG "END CERTIFICATE"
 _CHECK_NOT_LOG "ERROR"
@@ -183,7 +183,7 @@ _CHECK_NOT_LOG "ERROR"
 # Check if renewal works
 _TEST "Run in cron mode again, to check if renewal works"
 echo 'RENEW_DAYS="300"' >> config
-./dehydrated.sh --cron > tmplog 2> errorlog || _FAIL "Script execution failed"
+./dehydrated --cron > tmplog 2> errorlog || _FAIL "Script execution failed"
 _CHECK_LOG "Checking domain name(s) of existing cert... unchanged."
 _CHECK_LOG "Renewing!"
 _CHECK_ERRORLOG
@@ -202,7 +202,7 @@ _CHECK_ERRORLOG
 
 # Revoke certificate using certificate key
 _TEST "Revoking certificate..."
-./dehydrated.sh --revoke "certs/${TMP_URL}/cert.pem" --privkey "certs/${TMP_URL}/privkey.pem" > tmplog 2> errorlog || _FAIL "Script execution failed"
+./dehydrated --revoke "certs/${TMP_URL}/cert.pem" --privkey "certs/${TMP_URL}/privkey.pem" > tmplog 2> errorlog || _FAIL "Script execution failed"
 REAL_CERT="$(readlink -n "certs/${TMP_URL}/cert.pem")"
 _CHECK_LOG "Revoking certs/${TMP_URL}/${REAL_CERT}"
 _CHECK_LOG "Done."
@@ -211,7 +211,7 @@ _CHECK_ERRORLOG
 
 # Test cleanup command
 _TEST "Cleaning up certificates"
-./dehydrated.sh --cleanup > tmplog 2> errorlog || _FAIL "Script execution failed"
+./dehydrated --cleanup > tmplog 2> errorlog || _FAIL "Script execution failed"
 _CHECK_LOG "Moving unused file to archive directory: ${TMP_URL}/cert-"
 _CHECK_LOG "Moving unused file to archive directory: ${TMP_URL}/chain-"
 _CHECK_LOG "Moving unused file to archive directory: ${TMP_URL}/fullchain-"