Count with encryption tag for channel messages

2 months ago · 6e5dfd3a56
parent e25675a4e1
commit 6e5dfd3a56
1 changed files with 3 additions and 1 deletions
--- a/core/src/trezor/wire/thp/channel.py
+++ b/core/src/trezor/wire/thp/channel.py
@ -287,7 +287,9 @@ class Channel(Context):
        pass

    def _handle_channel_message(self, message_length: int, message_type: int) -> None:
-        buf = self.buffer[INIT_DATA_OFFSET + 3 : message_length - CHECKSUM_LENGTH]
+        buf = self.buffer[
+            INIT_DATA_OFFSET + 3 : message_length - CHECKSUM_LENGTH - TAG_LENGTH
+        ]

        expected_type = protobuf.type_for_wire(message_type)
        message = message_handler.wrap_protobuf_load(buf, expected_type)