o €Ïšã@s dZddlZGdd„deƒZdS)ú3Interface to handle end to end flow of U2F signing.éNc@s(eZdZdZejjfdd„Zdd„ZdS)ÚBaseAuthenticatorrcCót‚)aÛAuthenticates app_id with a security key. Executes the U2F authentication/signature flow with a security key. Args: app_id: The app_id to register the security key against. challenge_data: List of dictionaries containing a RegisteredKey ('key') and the raw challenge data ('challenge') for this key. print_callback: Callback to print a message to the user. The callback function takes one argument--the message to display. Returns: A dictionary with the following fields: 'clientData': url-safe base64 encoded ClientData JSON signed by the key. 'signatureData': url-safe base64 encoded signature. 'applicationId': application id. 'keyHandle': url-safe base64 encoded handle of the key used to sign. Raises: U2FError: There was some kind of problem with registration (e.g. the device was already registered or there was a timeout waiting for the test of user presence). ©ÚNotImplementedError)ÚselfÚapp_idÚchallenge_dataÚprint_callback©r úL/tmp/google-cloud-sdk/lib/third_party/pyu2f/convenience/baseauthenticator.pyÚ AuthenticateszBaseAuthenticator.AuthenticatecCr)zôIndicates whether the authenticator implementation is available to sign. The caller should not call Authenticate() if IsAvailable() returns False Returns: True if the authenticator is available to sign and False otherwise. r)rr r r Ú IsAvailable1s zBaseAuthenticator.IsAvailableN) Ú__name__Ú __module__Ú __qualname__Ú__doc__ÚsysÚstderrÚwriter rr r r r rs  ÿ r)rrÚobjectrr r r r Ús