Update hook for new version of dehydrated

Document wildcard domains in the README

Issue #5
Issue #6

README.md

@@ -1,7 +1,7 @@
 # Let's Encrypt Lexicon Service
 
 This container uses the awesome [Lexicon](https://github.com/AnalogJ/lexicon)
-library with [letsencrypt.sh](https://github.com/lukas2511/letsencrypt.sh) to
+library with [dehydrated](https://github.com/dehydrated-io/dehydrated/) to
 automatically obtain SSL certs from [Let's Encrypt](https://letsencrypt.org/).
 
 Multiple domains, as well as SANs, are supported. Certificates will be
@@ -38,6 +38,16 @@ admin.example.com
 This will request two certificates: one for example.com with a SAN of
 www.example.com, and a separate one for admin.example.com.
 
+To obtain a wildcard certificate you must alias the domain:
+
+```
+*.example.com > star_example_com
+```
+
+This will request the wildcard certificate and store it under
+`star_example_com`. For more information see
+[Dehydrated's docs](https://github.com/dehydrated-io/dehydrated/blob/master/docs/examples/domains.txt).
+
 The container uses inotify to monitor the domains.txt file for changes,
 so you can update it while the container is running and changes will be
 automatically applied.

hook.sh

@@ -49,79 +49,8 @@ function clean_challenge {
     # The parameters are the same as for deploy_challenge.
 }
 
-function invalid_challenge() {
-    local DOMAIN="${1}" RESPONSE="${2}"
+HANDLER="$1"; shift
+if [[ "${HANDLER}" =~ ^(deploy_challenge|clean_challenge)$ ]]; then
+  "$HANDLER" "$@"
+fi
 
-    echo "invalid_challenge called: ${DOMAIN}, ${RESPONSE}"
-
-    # This hook is called if the challenge response has failed, so domain
-    # owners can be aware and act accordingly.
-    #
-    # Parameters:
-    # - DOMAIN
-    #   The primary domain name, i.e. the certificate common
-    #   name (CN).
-    # - RESPONSE
-    #   The response that the verification server returned
-}
-
-function deploy_cert {
-    local DOMAIN="${1}" KEYFILE="${2}" CERTFILE="${3}" FULLCHAINFILE="${4}" CHAINFILE="${5}"
-
-    echo "deploy_cert called: ${DOMAIN}, ${KEYFILE}, ${CERTFILE}, ${FULLCHAINFILE}, ${CHAINFILE}"
-
-    # This hook is called once for each certificate that has been
-    # produced. Here you might, for instance, copy your new certificates
-    # to service-specific locations and reload the service.
-    #
-    # Parameters:
-    # - DOMAIN
-    #   The primary domain name, i.e. the certificate common
-    #   name (CN).
-    # - KEYFILE
-    #   The path of the file containing the private key.
-    # - CERTFILE
-    #   The path of the file containing the signed certificate.
-    # - FULLCHAINFILE
-    #   The path of the file containing the full certificate chain.
-    # - CHAINFILE
-    #   The path of the file containing the intermediate certificate(s).
-}
-
-function unchanged_cert {
-    local DOMAIN="${1}" KEYFILE="${2}" CERTFILE="${3}" FULLCHAINFILE="${4}" CHAINFILE="${5}"
-
-    echo "unchanged_cert called: ${DOMAIN}, ${KEYFILE}, ${CERTFILE}, ${FULLCHAINFILE}, ${CHAINFILE}"
-
-    # This hook is called once for each certificate that is still
-    # valid and therefore wasn't reissued.
-    #
-    # Parameters:
-    # - DOMAIN
-    #   The primary domain name, i.e. the certificate common
-    #   name (CN).
-    # - KEYFILE
-    #   The path of the file containing the private key.
-    # - CERTFILE
-    #   The path of the file containing the signed certificate.
-    # - FULLCHAINFILE
-    #   The path of the file containing the full certificate chain.
-    # - CHAINFILE
-    #   The path of the file containing the intermediate certificate(s).
-}
-
-exit_hook() {
-  # This hook is called at the end of a dehydrated command and can be used
-  # to do some final (cleanup or other) tasks.
-
-  :
-}
-
-startup_hook() {
-  # This hook is called before the dehydrated command to do some initial tasks
-  # (e.g. starting a webserver).
-
-  :
-}
-
-HANDLER=$1; shift; $HANDLER "$@"