def load_data(self, data, offset):
return pyhsm.buffer_cmd.YHSM_Cmd_Buffer_Load(self.stick, data, offset).execute()<EOL>
Ask YubiHSM to load arbitrary data into it's internal buffer, at any offset.

The data is stored internally in the YubiHSM in temporary memory -
this operation would typically be followed by one or more L{generate_aead}
commands to actually retreive the generated secret (in encrypted form).

Load data to offset 0 to reset the buffer.

@param data: arbitrary data to load
@type data: string

@returns: Number of bytes in YubiHSM internal buffer after load
@rtype: integer

@see: L{pyhsm.buffer_cmd.YHSM_Cmd_Buffer_Load}