python: adding message_4 in test_lakers.py

examples/coap/src/bin/coapserver.rs

@@ -114,7 +114,7 @@ fn main() {
                 };
                 let (mut responder, message_4) = responder.prepare_message_4(&None).unwrap();
                 // send empty ack back
-                response.message.payload = b"".to_vec();
+                response.message.payload = Vec::from(message_4.as_slice());
 
                 println!("EDHOC exchange successfully completed");
                 println!("PRK_out: {:02x?}", prk_out);

lakers-python/README.md

@@ -44,7 +44,6 @@ MATURIN_PYPI_TOKEN=<your pypi token here> maturin publish
 ```
 .take().ok_or(StateMismatch)?,
 ## Requirements
-
 The maturin executable must be available. The recommended way is to install and use it in a virtual environment:
 
 ```

lakers-python/test/test_lakers.py

@@ -66,12 +66,12 @@ def _test_handshake(cred_r_transfer, cred_i_transfer):
     assert ead_3 == None
     valid_cred_i = lakers.credential_check_or_fetch(id_cred_i, CRED_I)
     r_prk_out = responder.verify_message_3(valid_cred_i)
+    message_4 = responder.prepare_message_4(None)
 
     assert i_prk_out == r_prk_out
 
-    # advanced state
-    responder.completed_without_message_4()
-    initiator.completed_without_message_4()
+    # initiator
+    ead_4 = initiator.process_message_4(message_4)
 
     i_oscore_secret = initiator.edhoc_exporter(0, [], 16)
     i_oscore_salt = initiator.edhoc_exporter(1, [], 8)