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dehydrated
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dehydrated
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#!/usr/bin/env bash
# dehydrated by lukas2511
# Source: https://dehydrated.io
#
# This script is licensed under The MIT License (see LICENSE for more information).
set -e
set -u
set -o pipefail
[[ -n "${ZSH_VERSION:-}" ]] && set -o SH_WORD_SPLIT && set +o FUNCTION_ARGZERO && set -o NULL_GLOB && set -o noglob
[[ -z "${ZSH_VERSION:-}" ]] && shopt -s nullglob && set -f
umask 077 # paranoid umask, we're creating private keys
# Close weird external file descriptors
exec 3>&-
exec 4>&-
VERSION="git-master-after-0.6.2"
# 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="${SCRIPTDIR}"
ORIGARGS="$@"
# 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
"${OPENSSL}" version > /dev/null 2>&1 || _exiterr "This script requires an openssl binary."
_sed "" < /dev/null > /dev/null 2>&1 || _exiterr "This script requires sed with support for extended (modern) regular expressions."
command -v grep > /dev/null 2>&1 || _exiterr "This script requires grep."
command -v mktemp > /dev/null 2>&1 || _exiterr "This script requires mktemp."
command -v diff > /dev/null 2>&1 || _exiterr "This script requires diff."
# curl returns with an error code in some ancient versions so we have to catch that
set +e
CURL_VERSION="$(curl -V 2>&1 | head -n1 | awk '{print $2}')"
retcode="$?"
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}"
__PFX_PASSWORD="${PFX_PASSWORD}"
__PFX_OUTPUT="${PFX_OUTPUT}"
__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="${__OCSP_MUST_STAPLE}"
PFX_PASSWORD="${__PFX_PASSWORD}"
PFX_OUTPUT="${__PFX_OUTPUT}"
PRIVATE_KEY_RENEW="${__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}"
}
hookscript_bricker_hook() {
# Hook scripts should ignore any hooks they don't know.
# Calling a random hook to make this clear to the hook script authors...
if [[ -n "${HOOK}" ]]; then
"${HOOK}" "this_hookscript_is_broken__dehydrated_is_working_fine__please_ignore_unknown_hooks_in_your_script"
fi
}
# verify configuration values
verify_config() {
[[ "${CHALLENGETYPE}" == "http-01" || "${CHALLENGETYPE}" == "dns-01" || "${CHALLENGETYPE}" == "tls-alpn-01" ]] || _exiterr "Unknown challenge type ${CHALLENGETYPE}... cannot continue."
if [[ "${CHALLENGETYPE}" = "dns-01" ]] && [[ -z "${HOOK}" ]]; then
_exiterr "Challenge type dns-01 needs a hook script for deployment... cannot continue."
fi
if [[ "${CHALLENGETYPE}" = "http-01" && ! -d "${WELLKNOWN}" && ! "${COMMAND:-}" = "register" ]]; then
_exiterr "WELLKNOWN directory doesn't exist, please create ${WELLKNOWN} and set appropriate permissions."
fi
[[ "${KEY_ALGO}" == "rsa" || "${KEY_ALGO}" == "prime256v1" || "${KEY_ALGO}" == "secp384r1" ]] || _exiterr "Unknown public key algorithm ${KEY_ALGO}... cannot continue."
if [[ -n "${IP_VERSION}" ]]; then
[[ "${IP_VERSION}" = "4" || "${IP_VERSION}" = "6" ]] || _exiterr "Unknown IP version ${IP_VERSION}... cannot continue."
fi
[[ "${API}" == "auto" || "${API}" == "1" || "${API}" == "2" ]] || _exiterr "Unsupported API version defined in config: ${API}"
[[ "${OCSP_DAYS}" =~ ^[0-9]+$ ]] || _exiterr "OCSP_DAYS must be a number"
}
# 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-v02.api.letsencrypt.org/directory"
OLDCA=
CERTDIR=
ALPNCERTDIR=
ACCOUNTDIR=
CHALLENGETYPE="http-01"
CONFIG_D=
CURL_OPTS=
DOMAINS_D=
DOMAINS_TXT=
HOOK=
HOOK_CHAIN="no"
RENEW_DAYS="30"
KEYSIZE="4096"
WELLKNOWN=
PFX_PASSWORD=
PFX_OUTPUT="no"
PRIVATE_KEY_RENEW="yes"
PRIVATE_KEY_ROLLOVER="no"
KEY_ALGO=rsa
OPENSSL=openssl
OPENSSL_CNF=
CONTACT_EMAIL=
LOCKFILE=
OCSP_MUST_STAPLE="no"
OCSP_FETCH="no"
OCSP_DAYS=5
IP_VERSION=
CHAINCACHE=
AUTO_CLEANUP="no"
DEHYDRATED_USER=
DEHYDRATED_GROUP=
API="auto"
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 ${CONFIG_D} specified for CONFIG_D does not point to a directory."
fi
# Allow globbing
[[ -n "${ZSH_VERSION:-}" ]] && set +o noglob || set +f
for check_config_d in "${CONFIG_D}"/*.sh; do
if [[ -f "${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 ${check_config_d} is not readable or not a file at all."
fi
done
# Disable globbing
[[ -n "${ZSH_VERSION:-}" ]] && set -o noglob || set -f
fi
# Check if we are running & are allowed to run as root
if [[ -n "$DEHYDRATED_USER" ]]; then
command -v sudo > /dev/null 2>&1 || _exiterr "DEHYDRATED_USER set but sudo not available. Please install sudo."
command -v getent > /dev/null 2>&1 || _exiterr "DEHYDRATED_USER set but getent not available. Please install getent."
TARGET_UID="$(getent passwd "${DEHYDRATED_USER}" | cut -d':' -f3)"
if [[ -z "${DEHYDRATED_GROUP}" ]]; then
if [[ "${EUID}" != "${TARGET_UID}" ]]; then
echo "# INFO: Running $0 as ${DEHYDRATED_USER}"
exec sudo -u "${DEHYDRATED_USER}" "${0}" ${ORIGARGS}
fi
else
TARGET_GID="$(getent group "${DEHYDRATED_GROUP}" | cut -d':' -f3)"
if [[ -z "${EGID:-}" ]]; then
command -v id > /dev/null 2>&1 || _exiterr "DEHYDRATED_GROUP set, don't know current gid and 'id' not available... Please provide 'id' binary."
EGID="$(id -g)"
fi
if [[ "${EUID}" != "${TARGET_UID}" ]] || [[ "${EGID}" != "${TARGET_GID}" ]]; then
echo "# INFO: Running $0 as ${DEHYDRATED_USER}/${DEHYDRATED_GROUP}"
exec sudo -u "${DEHYDRATED_USER}" -g "${DEHYDRATED_GROUP}" "${0}" ${ORIGARGS}
fi
fi
elif [[ -n "${DEHYDRATED_GROUP}" ]]; then
_exiterr "DEHYDRATED_GROUP can only be used in combination with DEHYDRATED_USER."
fi
# Check for missing dependencies
check_dependencies
# Remove slash from end of BASEDIR. Mostly for cleaner outputs, doesn't change functionality.
[[ "$BASEDIR" != "/" ]] && BASEDIR="${BASEDIR%%/}"
# Check BASEDIR and set default variables
[[ -d "${BASEDIR}" ]] || _exiterr "BASEDIR does not exist: ${BASEDIR}"
if [[ -z "${OLDCA}" ]] && [[ "${CA}" = "https://acme-v02.api.letsencrypt.org/directory" ]]; then
OLDCA="https://acme-v01.api.letsencrypt.org/directory"
fi
# Create new account directory or symlink to account directory from old CA
CAHASH="$(echo "${CA}" | urlbase64)"
[[ -z "${ACCOUNTDIR}" ]] && ACCOUNTDIR="${BASEDIR}/accounts"
if [[ ! -e "${ACCOUNTDIR}/${CAHASH}" ]]; then
OLDCAHASH="$(echo "${OLDCA}" | urlbase64)"
mkdir -p "${ACCOUNTDIR}"
if [[ -n "${OLDCA}" ]] && [[ -e "${ACCOUNTDIR}/${OLDCAHASH}" ]]; then
echo "! Reusing account from ${OLDCA}"
ln -s "${OLDCAHASH}" "${ACCOUNTDIR}/${CAHASH}"
else
mkdir "${ACCOUNTDIR}/${CAHASH}"
fi
fi
[[ -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="${BASEDIR}/certs"
[[ -z "${ALPNCERTDIR}" ]] && ALPNCERTDIR="${BASEDIR}/alpn-certs"
[[ -z "${CHAINCACHE}" ]] && CHAINCACHE="${BASEDIR}/chains"
[[ -z "${DOMAINS_TXT}" ]] && DOMAINS_TXT="${BASEDIR}/domains.txt"
[[ -z "${WELLKNOWN}" ]] && WELLKNOWN="/var/www/dehydrated"
[[ -z "${LOCKFILE}" ]] && LOCKFILE="${BASEDIR}/lock"
[[ -z "${OPENSSL_CNF}" ]] && OPENSSL_CNF="$("${OPENSSL}" version -d | cut -d\" -f2)/openssl.cnf"
[[ -n "${PARAM_LOCKFILE_SUFFIX:-}" ]] && LOCKFILE="${LOCKFILE}-${PARAM_LOCKFILE_SUFFIX}"
[[ -n "${PARAM_NO_LOCK:-}" ]] && LOCKFILE=""
[[ -n "${PARAM_HOOK:-}" ]] && HOOK="${PARAM_HOOK}"
[[ -n "${PARAM_CERTDIR:-}" ]] && CERTDIR="${PARAM_CERTDIR}"
[[ -n "${PARAM_ALPNCERTDIR:-}" ]] && ALPNCERTDIR="${PARAM_ALPNCERTDIR}"
[[ -n "${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="${PARAM_IP_VERSION}"
[[ -n "${PARAM_PFX_PASSWORD:-}" ]] && PFX_PASSWORD="${PARAM_PFX_PASSWORD}"
[[ -n "${PARAM_PFX_OUTPUT:-}" ]] && PFX_OUTPUT="${PARAM_PFX_OUTPUT}"
if [ ! "${1:-}" = "noverify" ]; then
verify_config
fi
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}")"
# Automatic discovery of API version
if [[ "${API}" = "auto" ]]; then
grep -q newOrder <<< "${CA_DIRECTORY}" && API=2 || API=1
fi
if [[ ${API} -eq 1 ]]; then
# shellcheck disable=SC2015
CA_NEW_CERT="$(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" "${CA_DIRECTORY}" | get_json_string_value new-reg)" &&
CA_TERMS="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value terms-of-service)" &&
CA_REVOKE_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value revoke-cert)" ||
_exiterr "Problem retrieving ACME/CA-URLs, check if your configured CA points to the directory entrypoint."
# Since reg URI is missing from directory we will assume it is the same as CA_NEW_REG without the new part
CA_REG=${CA_NEW_REG/new-reg/reg}
else
# shellcheck disable=SC2015
CA_NEW_ORDER="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value newOrder)" &&
CA_NEW_NONCE="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value newNonce)" &&
CA_NEW_ACCOUNT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value newAccount)" &&
CA_TERMS="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value termsOfService)" &&
CA_REVOKE_CERT="$(printf "%s" "${CA_DIRECTORY}" | get_json_string_value revokeCert)" ||
_exiterr "Problem retrieving ACME/CA-URLs, check if your configured CA points to the directory entrypoint."
# Since acct URI is missing from directory we will assume it is the same as CA_NEW_ACCOUNT without the new part
CA_ACCOUNT=${CA_NEW_ACCOUNT/new-acct/acct}
fi
# Export some environment variables to be used in hook script
export WELLKNOWN BASEDIR CERTDIR ALPNCERTDIR CONFIG COMMAND
# Checking for private key ...
register_new_key="no"
if [[ -n "${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="${PARAM_ACCOUNT_KEY}.json"
[ "${COMMAND:-}" = "register" ] && register_new_key="yes"
else
# Check if private account key exists, if it doesn't exist yet generate a new one (rsa key)
if [[ ! -e "${ACCOUNT_KEY}" ]]; then
if [[ ! "${PARAM_ACCEPT_TERMS:-}" = "yes" ]]; then
printf '\n' >&2
printf 'To use dehydrated with this certificate authority you have to agree to their terms of service which you can find here: %s\n\n' "${CA_TERMS}" >&2
printf 'To accept these terms of service run `%s --register --accept-terms`.\n' "${0}" >&2
exit 1
fi
echo "+ Generating account key..."
local tmp_account_key="$(_mktemp)"
_openssl genrsa -out "${tmp_account_key}" "${KEYSIZE}"
cat "${tmp_account_key}" > "${ACCOUNT_KEY}"
rm "${tmp_account_key}"
register_new_key="yes"
fi
fi
"${OPENSSL}" rsa -in "${ACCOUNT_KEY}" -check 2>/dev/null > /dev/null || _exiterr "Account key is not valid, cannot 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..."
FAILED=false
if [[ ${API} -eq 1 && -z "${CA_NEW_REG}" ]] || [[ ${API} -eq 2 && -z "${CA_NEW_ACCOUNT}" ]]; then
echo "Certificate authority doesn't allow registrations."
FAILED=true
fi
# If an email for the contact has been provided then adding it to the registration request
if [[ "${FAILED}" = "false" ]]; then
if [[ ${API} -eq 1 ]]; then
if [[ -n "${CONTACT_EMAIL}" ]]; then
(signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "contact":["mailto:'"${CONTACT_EMAIL}"'"], "agreement": "'"${CA_TERMS}"'"}' > "${ACCOUNT_KEY_JSON}") || FAILED=true
else
(signed_request "${CA_NEW_REG}" '{"resource": "new-reg", "agreement": "'"${CA_TERMS}"'"}' > "${ACCOUNT_KEY_JSON}") || FAILED=true
fi
else
if [[ -n "${CONTACT_EMAIL}" ]]; then
(signed_request "${CA_NEW_ACCOUNT}" '{"contact":["mailto:'"${CONTACT_EMAIL}"'"], "termsOfServiceAgreed": true}' > "${ACCOUNT_KEY_JSON}") || FAILED=true
else
(signed_request "${CA_NEW_ACCOUNT}" '{"termsOfServiceAgreed": true}' > "${ACCOUNT_KEY_JSON}") || FAILED=true
fi
fi
fi
if [[ "${FAILED}" = "true" ]]; then
echo >&2
echo >&2
echo "Error registering account key. See message above for more information." >&2
rm "${ACCOUNT_KEY}" "${ACCOUNT_KEY_JSON}"
exit 1
fi
elif [[ "${COMMAND:-}" = "register" ]]; then
echo "+ Account already registered!"
exit 0
fi
# Read account information or request from CA if missing
if [[ -e "${ACCOUNT_KEY_JSON}" ]]; then
ACCOUNT_ID="$(cat "${ACCOUNT_KEY_JSON}" | get_json_int_value id)"
if [[ ${API} -eq 1 ]]; then
ACCOUNT_URL="${CA_REG}/${ACCOUNT_ID}"
else
ACCOUNT_URL="${CA_ACCOUNT}/${ACCOUNT_ID}"
fi
else
echo "Fetching missing account information from CA..."
if [[ ${API} -eq 1 ]]; then
_exiterr "This is not implemented for ACMEv1! Consider switching to ACMEv2 :)"
else
ACCOUNT_URL="$(signed_request "${CA_NEW_ACCOUNT}" '{"onlyReturnExisting": true}' 4>&1 | grep -i ^Location: | awk '{print $2}' | tr -d '\r\n')"
ACCOUNT_INFO="$(signed_request "${ACCOUNT_URL}" '{}')"
fi
ACCOUNT_ID="${ACCOUNT_URL##*/}"
echo "${ACCOUNT_INFO}" > "${ACCOUNT_KEY_JSON}"
fi
}
# Different sed version for different os types...
_sed() {
if [[ "${OSTYPE}" = "Linux" || "${OSTYPE:0:5}" = "MINGW" ]]; 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}"
}
# Get array value from json dictionary
get_json_array_value() {
local filter
filter=$(printf 's/.*"%s": *\\[\([^]]*\)\\].*/\\1/p' "$1")
sed -n "${filter}"
}
# Get sub-dictionary from json
get_json_dict_value() {
local filter
filter=$(printf 's/.*"%s": *{\([^}]*\)}.*/\\1/p' "$1")
sed -n "${filter}"
}
# Get integer value from json
get_json_int_value() {
local filter
filter=$(printf 's/.*"%s": *\([0-9]*\).*/\\1/p' "$1")
sed -n "${filter}"
}
rm_json_arrays() {
local filter
filter='s/\[[^][]*\]/null/g'
# remove three levels of nested arrays
sed -e "${filter}" -e "${filter}" -e "${filter}"
}
# OpenSSL writes to stderr/stdout even when there are no errors. So just
# display the output if the exit code was != 0 to simplify debugging.
_openssl() {
set +e
out="$("${OPENSSL}" "${@}" 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)"
tempheaders="$(_mktemp)"
if [[ -n "${IP_VERSION:-}" ]]; then
ip_version="-${IP_VERSION}"
fi
set +e
if [[ "${1}" = "head" ]]; then
statuscode="$(curl ${ip_version:-} ${CURL_OPTS} -A "dehydrated/${VERSION} curl/${CURL_VERSION}" -s -w "%{http_code}" -o "${tempcont}" "${2}" -I)"
touch "${tempheaders}"
curlret="${?}"
elif [[ "${1}" = "get" ]]; then
statuscode="$(curl ${ip_version:-} ${CURL_OPTS} -A "dehydrated/${VERSION} curl/${CURL_VERSION}" -L -s -w "%{http_code}" -o "${tempcont}" -D "${tempheaders}" "${2}")"
curlret="${?}"
elif [[ "${1}" = "post" ]]; then
statuscode="$(curl ${ip_version:-} ${CURL_OPTS} -A "dehydrated/${VERSION} curl/${CURL_VERSION}" -s -w "%{http_code}" -o "${tempcont}" "${2}" -D "${tempheaders}" -H 'Content-Type: application/jose+json' -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
# check for existing registration warning
if [[ "${API}" = "1" ]] && [[ -n "${CA_NEW_REG:-}" ]] && [[ "${2}" = "${CA_NEW_REG:-}" ]] && [[ "${statuscode}" = "409" ]] && grep -q "Registration key is already in use" "${tempcont}"; then
# do nothing
:
# check for already-revoked warning
elif [[ -n "${CA_REVOKE_CERT:-}" ]] && [[ "${2}" = "${CA_REVOKE_CERT:-}" ]] && [[ "${statuscode}" = "409" ]]; then
grep -q "Certificate already revoked" "${tempcont}" && return
else
echo " + ERROR: An error occurred while sending ${1}-request to ${2} (Status ${statuscode})" >&2
echo >&2
echo "Details:" >&2
cat "${tempheaders}" >&2
cat "${tempcont}" >&2
echo >&2
echo >&2
# An exclusive hook for the {1}-request error might be useful (e.g., for sending an e-mail to admins)
if [[ -n "${HOOK}" ]]; then
errtxt="$(cat ${tempcont})"
errheaders="$(cat ${tempheaders})"
"${HOOK}" "request_failure" "${statuscode}" "${errtxt}" "${1}" "${errheaders}"
fi
rm -f "${tempcont}"
rm -f "${tempheaders}"
# remove temporary domains.txt file if used
[[ -n "${PARAM_DOMAIN:-}" && -n "${DOMAINS_TXT:-}" ]] && rm "${DOMAINS_TXT}"
exit 1
fi
fi
if { true >&4; } 2>/dev/null; then
cat "${tempheaders}" >&4
fi
cat "${tempcont}"
rm -f "${tempcont}"
rm -f "${tempheaders}"
}
# Send signed request
signed_request() {
# Encode payload as urlbase64
payload64="$(printf '%s' "${2}" | urlbase64)"
# Retrieve nonce from acme-server
if [[ ${API} -eq 1 ]]; then
nonce="$(http_request head "${CA}" | grep -i ^Replay-Nonce: | awk -F ': ' '{print $2}' | tr -d '\n\r')"
else
nonce="$(http_request head "${CA_NEW_NONCE}" | grep -i ^Replay-Nonce: | awk -F ': ' '{print $2}' | tr -d '\n\r')"
fi
# Build header with just our public key and algorithm information
header='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}}'
if [[ ${API} -eq 1 ]]; then
# Build another header which also contains the previously received nonce and encode it as urlbase64
protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "nonce": "'"${nonce}"'"}'
protected64="$(printf '%s' "${protected}" | urlbase64)"
else
# Build another header which also contains the previously received nonce and url and encode it as urlbase64
if [[ -n "${ACCOUNT_URL:-}" ]]; then
protected='{"alg": "RS256", "kid": "'"${ACCOUNT_URL}"'", "url": "'"${1}"'", "nonce": "'"${nonce}"'"}'
else
protected='{"alg": "RS256", "jwk": {"e": "'"${pubExponent64}"'", "kty": "RSA", "n": "'"${pubMod64}"'"}, "url": "'"${1}"'", "nonce": "'"${nonce}"'"}'
fi
protected64="$(printf '%s' "${protected}" | urlbase64)"
fi
# 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)"
if [[ ${API} -eq 1 ]]; then
# Send header + extended header + payload + signature to the acme-server
data='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
else
# Send extended header + payload + signature to the acme-server
data='{"protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
fi
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}" awk '/X509v3 Subject Alternative Name:/{print;getline;print;}' | tail -n1 )"
# split to one per line:
# shellcheck disable=SC1003
altnames="$( <<<"${altnames}" _sed -e 's/^[[:space:]]*//; s/, /\'$'\n''/g' )"
# we can only get DNS: ones signed
if grep -qEv '^(DNS|othername):' <<<"${altnames}"; then
_exiterr "Certificate signing request contains non-DNS Subject Alternative Names"
fi
# strip away the DNS: prefix
altnames="$( <<<"${altnames}" _sed -e 's/^(DNS:|othername:<unsupported>)//' )"
printf "%s" "${altnames}" | tr '\n' ' '
else
# No SANs, extract CN
altnames="$( <<<"${reqtext}" grep '^[[:space:]]*Subject:' | _sed -e 's/.* CN ?= ?([^ /,]*).*/\1/' )"
printf "%s" "${altnames}"
fi
}
# Create certificate for domain(s) and outputs it FD 3
sign_csr() {
csr="${1}" # the CSR itself (not a file)
if { true >&3; } 2>/dev/null; then
: # fd 3 looks OK
else
_exiterr "sign_csr: FD 3 not open"
fi
shift 1 || true
export altnames="${*}"
if [[ ${API} -eq 1 ]]; then
if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
_exiterr "Certificate authority doesn't allow certificate signing"
fi
elif [[ ${API} -eq 2 ]] && [[ -z "${CA_NEW_ORDER}" ]]; then
_exiterr "Certificate authority doesn't allow certificate signing"
fi
if [[ -n "${ZSH_VERSION:-}" ]]; then
local -A challenge_names challenge_uris challenge_tokens authorizations keyauths deploy_args
else
local -a challenge_names challenge_uris challenge_tokens authorizations keyauths deploy_args
fi
# Initial step: Find which authorizations we're dealing with
if [[ ${API} -eq 2 ]]; then
# Request new order and store authorization URIs
local challenge_identifiers=""
for altname in ${altnames}; do
challenge_identifiers+="$(printf '{"type": "dns", "value": "%s"}, ' "${altname}")"
done
challenge_identifiers="[${challenge_identifiers%, }]"
echo " + Requesting new certificate order from CA..."
result="$(signed_request "${CA_NEW_ORDER}" '{"identifiers": '"${challenge_identifiers}"'}')"
order_authorizations="$(echo ${result} | get_json_array_value authorizations)"
finalize="$(echo "${result}" | get_json_string_value finalize)"
local idx=0
for uri in ${order_authorizations}; do
authorizations[${idx}]="$(echo "${uri}" | _sed -e 's/\"(.*)".*/\1/')"
idx=$((idx+1))
done
echo " + Received ${idx} authorizations URLs from the CA"
else
# Copy $altnames to $authorizations (just doing this to reduce duplicate code later on)
local idx=0
for altname in ${altnames}; do
authorizations[${idx}]="${altname}"
idx=$((idx+1))
done
fi
# Check if authorizations are valid and gather challenge information for pending authorizations
local idx=0
for authorization in ${authorizations[*]}; do
if [[ "${API}" -eq 2 ]]; then
# Receive authorization ($authorization is authz uri)
response="$(http_request get "$(echo "${authorization}" | _sed -e 's/\"(.*)".*/\1/')" | clean_json)"
identifier="$(echo "${response}" | get_json_dict_value identifier | get_json_string_value value)"
echo " + Handling authorization for ${identifier}"
else
# Request new authorization ($authorization is altname)
identifier="${authorization}"
echo " + Requesting authorization for ${identifier}..."
response="$(signed_request "${CA_NEW_AUTHZ}" '{"resource": "new-authz", "identifier": {"type": "dns", "value": "'"${identifier}"'"}}' | clean_json)"
fi
# Check if authorization has already been validated
if [ "$(echo "${response}" | _sed 's/"challenges": \[\{.*\}\]//' | get_json_string_value status)" = "valid" ] && [ ! "${PARAM_FORCE:-no}" = "yes" ]; then
echo " + Found valid authorization for ${identifier}"
continue
fi
# Find challenge in authorization
challenges="$(echo "${response}" | _sed 's/.*"challenges": \[(\{.*\})\].*/\1/')"
challenge="$(<<<"${challenges}" _sed -e 's/^[^\[]+\[(.+)\]$/\1/' -e 's/\}(, (\{)|(\]))/}\'$'\n''\2/g' | grep \""${CHALLENGETYPE}"\" || true)"
if [ -z "${challenge}" ]; then
allowed_validations="$(grep -Eo '"type": "[^"]+"' <<< "${challenges}" | grep -Eo ' "[^"]+"' | _sed -e 's/"//g' -e 's/^ //g')"
_exiterr "Validating this certificate is not possible using ${CHALLENGETYPE}. Possible validation methods are: ${allowed_validations}"
fi
# Gather challenge information
challenge_names[${idx}]="${identifier}"
challenge_tokens[${idx}]="$(echo "${challenge}" | get_json_string_value token)"
if [[ ${API} -eq 2 ]]; then
challenge_uris[${idx}]="$(echo "${challenge}" | _sed 's/"validationRecord": ?\[[^]]+\]//g' | get_json_string_value url)"
else
challenge_uris[${idx}]="$(echo "${challenge}" | _sed 's/"validationRecord": ?\[[^]]+\]//g' | get_json_string_value uri)"
fi
# Prepare challenge tokens and deployment parameters
keyauth="${challenge_tokens[${idx}]}.${thumbprint}"
case "${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}/${challenge_tokens[${idx}]}"
chmod a+r "${WELLKNOWN}/${challenge_tokens[${idx}]}"
keyauth_hook="${keyauth}"
;;
"dns-01")
# Generate DNS entry content for dns-01 validation
keyauth_hook="$(printf '%s' "${keyauth}" | "${OPENSSL}" dgst -sha256 -binary | urlbase64)"
;;
"tls-alpn-01")
keyauth_hook="$(printf '%s' "${keyauth}" | "${OPENSSL}" dgst -sha256 -c -hex | awk '{print $2}')"
generate_alpn_certificate "${identifier}" "${keyauth_hook}"
;;
esac
keyauths[${idx}]="${keyauth}"
deploy_args[${idx}]="${identifier} ${challenge_tokens[${idx}]} ${keyauth_hook}"
idx=$((idx+1))
done
local num_pending_challenges=${idx}
echo " + ${num_pending_challenges} pending challenge(s)"
# Deploy challenge tokens
if [[ ${num_pending_challenges} -ne 0 ]]; then
echo " + Deploying challenge tokens..."
if [[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]]; then
"${HOOK}" "deploy_challenge" ${deploy_args[@]}
elif [[ -n "${HOOK}" ]]; then
# Run hook script to deploy the challenge token
local idx=0
while [ ${idx} -lt ${num_pending_challenges} ]; do
"${HOOK}" "deploy_challenge" ${deploy_args[${idx}]}
idx=$((idx+1))
done
fi
fi
# Validate pending challenges
local idx=0
while [ ${idx} -lt ${num_pending_challenges} ]; do
echo " + Responding to challenge for ${challenge_names[${idx}]} authorization..."
# Ask the acme-server to verify our challenge and wait until it is no longer pending
if [[ ${API} -eq 1 ]]; then
result="$(signed_request "${challenge_uris[${idx}]}" '{"resource": "challenge", "keyAuthorization": "'"${keyauths[${idx}]}"'"}' | clean_json)"
else
result="$(signed_request "${challenge_uris[${idx}]}" '{"keyAuthorization": "'"${keyauths[${idx}]}"'"}' | clean_json)"
fi
reqstatus="$(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_tokens[${idx}]}"
[[ "${CHALLENGETYPE}" = "tls-alpn-01" ]] && rm -f "${ALPNCERTDIR}/${challenge_names[${idx}]}.crt.pem" "${ALPNCERTDIR}/${challenge_names[${idx}]}.key.pem"
if [[ "${reqstatus}" = "valid" ]]; then
echo " + Challenge is valid!"
else
[[ -n "${HOOK}" ]] && "${HOOK}" "invalid_challenge" "${altname}" "${result}"
break
fi
idx=$((idx+1))
done
if [[ ${num_pending_challenges} -ne 0 ]]; then
echo " + Cleaning challenge tokens..."
# Clean challenge tokens using chained hook
[[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" = "yes" ]] && "${HOOK}" "clean_challenge" ${deploy_args[@]}
# Clean remaining challenge tokens if validation has failed
local idx=0
while [ ${idx} -lt ${num_pending_challenges} ]; do
# Delete challenge file
[[ "${CHALLENGETYPE}" = "http-01" ]] && rm -f "${WELLKNOWN}/${challenge_tokens[${idx}]}"
# Delete alpn verification certificates
[[ "${CHALLENGETYPE}" = "tls-alpn-01" ]] && rm -f "${ALPNCERTDIR}/${challenge_names[${idx}]}.crt.pem" "${ALPNCERTDIR}/${challenge_names[${idx}]}.key.pem"
# Clean challenge token using non-chained hook
[[ -n "${HOOK}" ]] && [[ "${HOOK_CHAIN}" != "yes" ]] && "${HOOK}" "clean_challenge" ${deploy_args[${idx}]}
idx=$((idx+1))
done
if [[ "${reqstatus}" != "valid" ]]; then
echo " + Challenge validation has failed :("
_exiterr "Challenge is invalid! (returned: ${reqstatus}) (result: ${result})"
fi
fi
# Finally request certificate from the acme-server and store it in cert-${timestamp}.pem and link from cert.pem
echo " + Requesting certificate..."
csr64="$( <<<"${csr}" "${OPENSSL}" req -config "${OPENSSL_CNF}" -outform DER | urlbase64)"
if [[ ${API} -eq 1 ]]; then
crt64="$(signed_request "${CA_NEW_CERT}" '{"resource": "new-cert", "csr": "'"${csr64}"'"}' | "${OPENSSL}" base64 -e)"
crt="$( printf -- '-----BEGIN CERTIFICATE-----\n%s\n-----END CERTIFICATE-----\n' "${crt64}" )"
else
result="$(signed_request "${finalize}" '{"csr": "'"${csr64}"'"}' | clean_json | get_json_string_value certificate)"
crt="$(http_request get "${result}")"
fi
# Try to load the certificate to detect corruption
echo " + Checking certificate..."
_openssl x509 -text <<<"${crt}"
echo "${crt}" >&3
unset challenge_token
echo " + Done!"
}
# grep issuer cert uri from certificate
get_issuer_cert_uri() {
certificate="${1}"
"${OPENSSL}" x509 -in "${certificate}" -noout -text | (grep 'CA Issuers - URI:' | cut -d':' -f2-) || true
}
get_issuer_hash() {
certificate="${1}"
"${OPENSSL}" x509 -in "${certificate}" -noout -issuer_hash
}
get_ocsp_url() {
certificate="${1}"
"${OPENSSL}" x509 -in "${certificate}" -noout -ocsp_uri
}
# walk certificate chain, retrieving all intermediate certificates
walk_chain() {
local certificate
certificate="${1}"
local issuer_cert_uri
issuer_cert_uri="${2:-}"
if [[ -z "${issuer_cert_uri}" ]]; then issuer_cert_uri="$(get_issuer_cert_uri "${certificate}")"; fi
if [[ -n "${issuer_cert_uri}" ]]; then
# create temporary files
local tmpcert
local tmpcert_raw
tmpcert_raw="$(_mktemp)"
tmpcert="$(_mktemp)"
# download certificate
http_request get "${issuer_cert_uri}" > "${tmpcert_raw}"
# PEM
if grep -q "BEGIN CERTIFICATE" "${tmpcert_raw}"; then mv "${tmpcert_raw}" "${tmpcert}"
# DER
elif "${OPENSSL}" x509 -in "${tmpcert_raw}" -inform DER -out "${tmpcert}" -outform PEM 2> /dev/null > /dev/null; then :
# PKCS7
elif "${OPENSSL}" pkcs7 -in "${tmpcert_raw}" -inform DER -out "${tmpcert}" -outform PEM -print_certs 2> /dev/null > /dev/null; then :
# Unknown certificate type
else _exiterr "Unknown certificate type in chain"
fi
local next_issuer_cert_uri
next_issuer_cert_uri="$(get_issuer_cert_uri "${tmpcert}")"
if [[ -n "${next_issuer_cert_uri}" ]]; then
printf "\n%s\n" "${issuer_cert_uri}"
cat "${tmpcert}"
walk_chain "${tmpcert}" "${next_issuer_cert_uri}"
fi
rm -f "${tmpcert}" "${tmpcert_raw}"
fi
}
# Generate ALPN verification certificate
generate_alpn_certificate() {
local altname="${1}"
local acmevalidation="${2}"
local alpncertdir="${ALPNCERTDIR}"
if [[ ! -e "${alpncertdir}" ]]; then
echo " + Creating new directory ${alpncertdir} ..."
mkdir -p "${alpncertdir}" || _exiterr "Unable to create directory ${alpncertdir}"
fi
echo " + Generating ALPN certificate and key for ${1}..."
tmp_openssl_cnf="$(_mktemp)"
cat "${OPENSSL_CNF}" > "${tmp_openssl_cnf}"
printf "[SAN]\nsubjectAltName=DNS:%s\n" "${altname}" >> "${tmp_openssl_cnf}"
printf "1.3.6.1.5.5.7.1.30.1=critical,DER:04:20:${acmevalidation}\n" >> "${tmp_openssl_cnf}"
SUBJ="/CN=${altname}/"
[[ "${OSTYPE:0:5}" = "MINGW" ]] && SUBJ="/${SUBJ}"
_openssl req -x509 -new -sha256 -nodes -newkey rsa:2048 -keyout "${alpncertdir}/${altname}.key.pem" -out "${alpncertdir}/${altname}.crt.pem" -subj "${SUBJ}" -extensions SAN -config "${tmp_openssl_cnf}"
}
# Create certificate for domain(s)
sign_domain() {
local certdir="${1}"
shift
timestamp="${1}"
shift
domain="${1}"
altnames="${*}"
export altnames
echo " + Signing domains..."
if [[ ${API} -eq 1 ]]; then
if [[ -z "${CA_NEW_AUTHZ}" ]] || [[ -z "${CA_NEW_CERT}" ]]; then
_exiterr "Certificate authority doesn't allow certificate signing"
fi
elif [[ ${API} -eq 2 ]] && [[ -z "${CA_NEW_ORDER}" ]]; then
_exiterr "Certificate authority doesn't allow certificate signing"
fi
local privkey="privkey.pem"
if [[ ! -e "${certdir}/cert-${timestamp}.csr" ]]; then
# generate a new private key if we need or want one
if [[ ! -r "${certdir}/privkey.pem" ]] || [[ "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
echo " + Generating private key..."
privkey="privkey-${timestamp}.pem"
local tmp_privkey="$(_mktemp)"
case "${KEY_ALGO}" in
rsa) _openssl genrsa -out "${tmp_privkey}" "${KEYSIZE}";;
prime256v1|secp384r1) _openssl ecparam -genkey -name "${KEY_ALGO}" -out "${tmp_privkey}";;
esac
cat "${tmp_privkey}" > "${certdir}/privkey-${timestamp}.pem"
rm "${tmp_privkey}"
fi
# move rolloverkey into position (if any)
if [[ -r "${certdir}/privkey.pem" && -r "${certdir}/privkey.roll.pem" && "${PRIVATE_KEY_RENEW}" = "yes" && "${PRIVATE_KEY_ROLLOVER}" = "yes" ]]; then
echo " + Moving Rolloverkey into position.... "
mv "${certdir}/privkey.roll.pem" "${certdir}/privkey-tmp.pem"
mv "${certdir}/privkey-${timestamp}.pem" "${certdir}/privkey.roll.pem"
mv "${certdir}/privkey-tmp.pem" "${certdir}/privkey-${timestamp}.pem"
fi
# generate a new private rollover key if we need or want one
if [[ ! -r "${certdir}/privkey.roll.pem" && "${PRIVATE_KEY_ROLLOVER}" = "yes" && "${PRIVATE_KEY_RENEW}" = "yes" ]]; then
echo " + Generating private rollover key..."
case "${KEY_ALGO}" in
rsa) _openssl genrsa -out "${certdir}/privkey.roll.pem" "${KEYSIZE}";;
prime256v1|secp384r1) _openssl ecparam -genkey -name "${KEY_ALGO}" -out "${certdir}/privkey.roll.pem";;
esac
fi
# delete rolloverkeys if disabled
if [[ -r "${certdir}/privkey.roll.pem" && ! "${PRIVATE_KEY_ROLLOVER}" = "yes" ]]; then