tests/card_emulator.py: software emulator of the ChromeCard FIDO2
authenticator. Implements make_credential and get_assertion with real P-256
cryptography and an in-memory credential store. Both methods accept
user_confirms=True/False to simulate the card's Yes/No confirmation dialog;
False raises CtapError(OPERATION_DENIED). refusing() returns a wrapper that
forces user_confirms=False for integration tests that route through
_with_direct_ctap2. forget_user() simulates card-side credential removal.
Module docstring serves as the usage guide.
tests/test_k_proxy.py: 22 new tests across TestCardEmulatorUnit (direct
emulator calls) and TestCardEmulatorIntegration (full ProxyState flows
covering register, authenticate, user-says-no, forget, two-user isolation,
and sign-count monotonicity).
k_proxy_app.py: fix two bugs where RegistrationResponse and
AuthenticationResponse were constructed with id= instead of raw_id=. Both
calls raised TypeError at runtime, silently caught by the surrounding except
block, making all fido2-direct register and authenticate calls fail.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Morten V. Christiansen
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