(self, target, target_relpath)
NOTE: We assume that all the public keys needed to verify any in-toto
        root layout, or sublayout, metadata file has been directly signed by
        the top-level TUF targets role using *OFFLINE* keys. This is a
        reasonable assumption, as TUF does not offer meaningful security
        guarantees if _ALL_ targets were signed using _online_ keys.
NOTE: We assume that all the public keys needed to verify any in-toto
        root layout, or sublayout, metadata file has been directly signed by
        the top-level TUF targets role using *OFFLINE* keys. This is a
        reasonable assumption, as TUF does not offer meaningful security
        guarantees if _ALL_ targets were signed using _online_ keys.
NOTE : We assume that all the public keys needed to verify any in - toto root layout or sublayout metadata file has been directly signed by the top - level TUF targets role using * OFFLINE * keys . This is a reasonable assumption as TUF does not offer meaningful security guarantees if _ALL_ targets were signed using _online_ keys .
def __download_in_toto_layout_pubkeys(self, target, target_relpath):
        """
        NOTE: We assume that all the public keys needed to verify any in-toto
        root layout, or sublayout, metadata file has been directly signed by
        the top-level TUF targets role using *OFFLINE* keys. This is a
        reasonable assumption, as TUF does not offer meaningful security
        guarantees if _ALL_ targets were signed using _online_ keys.
        """

        pubkey_abspaths = self.__download_custom(target, '.pub')
        if not len(pubkey_abspaths):
            raise NoInTotoRootLayoutPublicKeysFound(target_relpath)
        else:
            return pubkey_abspaths
def __download_in_toto_layout_pubkeys ( self , target , target_relpath ) : pubkey_abspaths = self . __download_custom ( target , '.pub' ) if not len ( pubkey_abspaths ) : raise NoInTotoRootLayoutPublicKeysFound ( target_relpath ) else : return pubkey_abspaths