Vendor Command + HID fix (#618)

* Fixes CBOR message passing through Vendor HID

I did all my tests on hardware with this fix, and now I'm surprised that
it didn't end up on develop. So should have been part of a former PR.

* vendor channel test

* forward vendor HID correctly for upgrades

* fixes cargo fmt

* removes script and updates documentation to match

src/env/tock/commands.rs

@@ -44,7 +44,7 @@ pub fn process_vendor_command(
     channel: Channel,
 ) -> Option<Vec<u8>> {
     #[cfg(feature = "vendor_hid")]
-    if matches!(channel, Channel::VendorHid(_)) {
+    if matches!(channel, Channel::MainHid(_)) {
         return None;
     }
     process_cbor(env, bytes, channel).unwrap_or_else(|e| Some(vec![e as u8]))
@@ -290,6 +290,8 @@ mod test {
     use cbor::cbor_map;
 
     const DUMMY_CHANNEL: Channel = Channel::MainHid([0x12, 0x34, 0x56, 0x78]);
+    #[cfg(feature = "vendor_hid")]
+    const VENDOR_CHANNEL: Channel = Channel::VendorHid([0x12, 0x34, 0x56, 0x78]);
 
     #[test]
     fn test_process_cbor_unrelated_input() {
@@ -317,6 +319,17 @@ mod test {
             .is_some());
     }
 
+    #[test]
+    #[cfg(feature = "vendor_hid")]
+    fn test_process_command_valid_vendor_hid() {
+        let mut env = TockEnv::default();
+        let cbor_bytes = vec![VENDOR_COMMAND_UPGRADE_INFO];
+        assert!(process_cbor(&mut env, &cbor_bytes, VENDOR_CHANNEL)
+            .unwrap()
+            .is_some());
+        assert!(process_vendor_command(&mut env, &cbor_bytes, VENDOR_CHANNEL).is_some());
+    }
+
     #[test]
     fn test_vendor_configure_parameters() {
         let dummy_cert = [0xddu8; 20];