workshop

tests/application_client/boilerplate_command_sender.py

@@ -29,6 +29,7 @@ class InsType(IntEnum):
     GET_APP_NAME   = 0x04
     GET_PUBLIC_KEY = 0x05
     SIGN_TX        = 0x06
+    GET_NONCE      = 0x07
 
 class Errors(IntEnum):
     SW_DENY                    = 0x6985
@@ -71,6 +72,13 @@ def get_version(self) -> RAPDU:
                                      p2=P2.P2_LAST,
                                      data=b"")
 
+    def get_nonce(self) -> RAPDU:
+        return self.backend.exchange(cla=CLA,
+                                     ins=InsType.GET_NONCE,
+                                     p1=P1.P1_START,
+                                     p2=P2.P2_LAST,
+                                     data=b"")
+
 
     def get_app_name(self) -> RAPDU:
         return self.backend.exchange(cla=CLA,

tests/application_client/boilerplate_response_unpacker.py

@@ -24,6 +24,11 @@ def unpack_get_version_response(response: bytes) -> Tuple[int, int, int]:
     major, minor, patch = unpack("BBB", response)
     return (major, minor, patch)
 
+def unpack_get_nonce_response(response: bytes) -> int:
+    assert len(response) == 1
+    return unpack("B", response)
+
+
 # Unpack from response:
 # response = format_id (1)
 #            app_name_raw_len (1)

tests/test_nonce.py

@@ -0,0 +1,11 @@
+from application_client.boilerplate_command_sender import BoilerplateCommandSender
+from application_client.boilerplate_response_unpacker import unpack_get_nonce_response
+
+# In this test we check the behavior of the device when asked to provide a nonce
+def test_nonce(backend):
+    # Use the app interface instead of raw interface
+    client = BoilerplateCommandSender(backend)
+    # Send the GET_VERSION instruction
+    rapdu = client.get_nonce()
+    # Use an helper to parse the response, assert the values
+    print(unpack_get_nonce_response(rapdu.data))