Add Option to Control HTTP Scheme (#7318)

* Add Option to Control HTTP Scheme

Once certificates are installed renewal should always use HTTPS.
HTTP is only required if there have never been any certificates on
the device.

This also fixes an authentication issue where HTTPS is forced
by the device. Before this patch authentication failed for
devices which forced HTTPS because the POST request used
for request did not follow the HTTP to HTTPS redirect.

* Use http as Default Scheme

Using https as default for SHELLY_SCHEME breaks existing deployments
as they may not have a SHELLY_HOST which is identical to a name in
the certificate.

SHELLY_SCHEME is now a parameter as any other without the automatic
upgrade to https. This will always need to be done manually.

deploy/shelly.sh

@@ -4,18 +4,29 @@
 # Deploy the HTTPS server certificate to a Shelly device on the local network.
 #
 # ```sh
-# export SHELLY_HOST=192.168.1.100
-# export SHELLY_PASSWORD=mysecret    # only if auth is enabled on the device
+# export SHELLY_HOST=shelly.example.com
+# export SHELLY_PASSWORD=mysecret  # only if auth is enabled on the device
+# export SHELLY_SCHEME=https       # only if devices factory shipped with
+#                                  # firmware 2.0.0 or already has https
+#                                  # enabled
 # acme.sh --deploy -d shelly.example.com --deploy-hook shelly
 # ```
 #
+# If `SHELLY_SCHEME=https` is used, the first deploy is likely to require
+# the additional `--insecure` parameter due to factory signed certificates.
+# After the initial deployment make sure to retest deployment without
+# `--insecure` simply using `acme.sh --deploy -d shelly.example.com`
+# to ensure follow up deployment will work.
+#
 # Environment variables:
 #   SHELLY_HOST      (required)  IP or hostname of the Shelly device
 #   SHELLY_PASSWORD  (optional)  Admin password for digest authentication.
 #                                Omit if auth is disabled on the device.
 #   SHELLY_USER      (optional)  Username for auth. Default: admin
-#   SHELLY_REBOOT     (optional)  Set to "0" to skip auto-reboot.
+#   SHELLY_REBOOT    (optional)  Set to "0" to skip auto-reboot.
 #                                Default: 1 (reboot after upload)
+#   SHELLY_SCHEME    (optional)  Scheme used to call the API: http or https
+#                                Default: http
 #
 # Requirements:
 #   - Shelly Gen3+ device (Gen4 recommended)
@@ -23,7 +34,7 @@
 #   - curl or wget
 #   - openssl (for SHA-256 digest and random cnonce)
 #
-# The device must be reachable via HTTP on the local network.
+# The device must be reachable on the local network.
 # The hook uploads the fullchain.pem and private key,
 # then reboots the device to apply the new certificate.
 #
@@ -52,11 +63,13 @@ shelly_deploy() {
   _getdeployconf SHELLY_PASSWORD
   _getdeployconf SHELLY_USER
   _getdeployconf SHELLY_REBOOT
+  _getdeployconf SHELLY_SCHEME
 
   _debug SHELLY_HOST "$SHELLY_HOST"
   _debug SHELLY_USER "$SHELLY_USER"
   _secure_debug SHELLY_PASSWORD "$SHELLY_PASSWORD"
   _debug SHELLY_REBOOT "$SHELLY_REBOOT"
+  _debug SHELLY_SCHEME "$SHELLY_SCHEME"
 
   if [ -z "$SHELLY_HOST" ]; then
     _err "SHELLY_HOST is required. Please set the IP or hostname of your Shelly device."
@@ -65,11 +78,20 @@ shelly_deploy() {
 
   SHELLY_USER="${SHELLY_USER:-admin}"
   SHELLY_REBOOT="${SHELLY_REBOOT:-1}"
+  SHELLY_SCHEME="${SHELLY_SCHEME:-http}"
+  case "$SHELLY_SCHEME" in
+  http | https) ;;
+  *)
+    _err "SHELLY_SCHEME must be http or https"
+    return 1
+    ;;
+  esac
 
   _savedeployconf SHELLY_HOST "$SHELLY_HOST"
   _savedeployconf SHELLY_PASSWORD "$SHELLY_PASSWORD"
   _savedeployconf SHELLY_USER "$SHELLY_USER"
   _savedeployconf SHELLY_REBOOT "$SHELLY_REBOOT"
+  _savedeployconf SHELLY_SCHEME "$SHELLY_SCHEME"
 
   # --- Auth handshake (only if password is set) ---
   _shelly_auth_header=""
@@ -126,7 +148,7 @@ _shelly_handshake() {
   # Use a protected method (Shelly.GetStatus) to trigger 401.
   # Shelly.GetDeviceInfo is excluded from auth and would miss the challenge.
   _post '{"id":1,"method":"Shelly.GetStatus"}' \
-    "http://${SHELLY_HOST}/rpc" "" "" "application/json"
+    "${SHELLY_SCHEME}://${SHELLY_HOST}/rpc" "" "" "application/json"
 
   # Detect auth from HTTP status line rather than response body
   if ! _shelly_has_auth_challenge "$HTTP_HEADER"; then
@@ -210,7 +232,7 @@ _shelly_rpc() {
     export _H1=""
   fi
 
-  _post "$_shelly_body" "http://${SHELLY_HOST}/rpc" "" "" "application/json"
+  _post "$_shelly_body" "${SHELLY_SCHEME}://${SHELLY_HOST}/rpc" "" "" "application/json"
   _shelly_ret=$?
 
   if [ "$_shelly_ret" != "0" ]; then