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chore(python): test fallback in handshake

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This commit is contained in:
M1nd3r 2025-03-20 15:36:42 +01:00
parent 7436e8c773
commit 04bd4c6488
2 changed files with 34 additions and 2 deletions
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11
python/src/trezorlib/transport/thp/protocol_v2.py
View File

@ -171,9 +171,12 @@ class ProtocolV2Channel(Channel):
header, payload = self._read_until_valid_crc_check()
self._send_ack_0()
if header.ctrl_byte == 0x42:
if control_byte.is_error(header.ctrl_byte):
if payload == b"\x05":
raise exceptions.DeviceLockedException()
else:
err = _get_error_from_int(payload[0])
raise Exception("Received ThpError: " + err)
if not header.is_handshake_init_response():
LOG.error("Received message is not a valid handshake init response message")
@ -214,6 +217,9 @@ class ProtocolV2Channel(Channel):
header, data = self._read_until_valid_crc_check()
if not header.is_handshake_comp_response():
LOG.error("Received message is not a valid handshake completion response")
if control_byte.is_error(header.ctrl_byte):
err = _get_error_from_int(data[0])
raise Exception("Received ThpError: " + err)
trezor_state = self._noise.decrypt(bytes(data))
# TODO handle trezor_state
print("trezor state:", trezor_state)
@ -243,6 +249,9 @@ class ProtocolV2Channel(Channel):
header, payload = self._read_until_valid_crc_check()
if not header.is_ack() or len(payload) > 0:
LOG.error("Received message is not a valid ACK")
if control_byte.is_error(header.ctrl_byte):
err = _get_error_from_int(payload[0])
raise Exception("Received ThpError: " + err)
def _send_ack_0(self):
LOG.debug("sending ack 0")

25
tests/device_tests/thp/test_multiple_apps.py
View File

@ -13,6 +13,7 @@ def test_multiple_hosts(client: Client) -> None:
assert isinstance(client.protocol, ProtocolV2Channel)
protocol_1 = client.protocol
protocol_2 = ProtocolV2Channel(protocol_1.transport, protocol_1.mapping)
protocol_2._reset_sync_bits()
nonce_1 = os.urandom(8)
nonce_2 = os.urandom(8)
@ -34,7 +35,29 @@ def test_multiple_hosts(client: Client) -> None:
protocol_1._read_ack()
protocol_1._read_handshake_init_response()
protocol_2._send_handshake_init_request()
with pytest.raises(Exception) as e:
protocol_2._read_ack()
assert e.value.args[0] == "Received ThpError: TRANSPORT BUSY"
time.sleep(0.2) # To pass LOCK_TIME
protocol_2._init_noise()
protocol_2._send_handshake_init_request()
protocol_2._read_ack()
# protocol_2._read_handshake_init_response()
protocol_2._read_handshake_init_response()
protocol_2._send_handshake_completion_request()
protocol_2._read_ack()
protocol_2._read_handshake_completion_response()
protocol_2._do_pairing(helper_debug=client.debug)
protocol_1._send_handshake_completion_request()
protocol_1._read_ack()
with pytest.raises(Exception) as e:
protocol_1._read_handshake_completion_response()
assert e.value.args[0] == "Received ThpError: UNALLOCATED CHANNEL"
# TODO - test ACK fallback, test standard encrypted message fallback