    if expected_challenge != client_data.challenge:
        raise InvalidAuthenticationResponse("Client data challenge was not expected challenge")

    if isinstance(expected_origin, str):
        if expected_origin != client_data.origin:
            raise InvalidAuthenticationResponse(
                f'Unexpected client data origin "{client_data.origin}", expected "{expected_origin}"'
            )
    else:
        try:
            expected_origin.index(client_data.origin)
        except ValueError:
            raise InvalidAuthenticationResponse(
                f'Unexpected client data origin "{client_data.origin}", expected one of {expected_origin}'
            )
…
    # Generate a hash of the expected RP ID for comparison
    expected_rp_id_hash = hashlib.sha256()
    expected_rp_id_hash.update(expected_rp_id.encode("utf-8"))
    expected_rp_id_hash_bytes = expected_rp_id_hash.digest()

    if auth_data.rp_id_hash != expected_rp_id_hash_bytes:
        raise InvalidAuthenticationResponse("Unexpected RP ID hash")
…
    client_data_hash = hashlib.sha256()
    client_data_hash.update(client_data_bytes)
    client_data_hash_bytes = client_data_hash.digest()

    signature_base = authenticator_data_bytes + client_data_hash_bytes

    try:
        decoded_public_key = decode_credential_public_key(credential_public_key)
        crypto_public_key = decoded_public_key_to_cryptography(decoded_public_key)

        verify_signature(
            public_key=crypto_public_key,
            signature_alg=decoded_public_key.alg,
            signature=signature_bytes,
            data=signature_base,
        )
    except InvalidSignature:
        raise InvalidAuthenticationResponse("Could not verify authentication signature")

Échauffement