def METHOD_NAME(self):
    dce, rpctransport = self.connect()
    request = bkrp.BackuprKey()
    request['pguidActionAgent'] = bkrp.BACKUPKEY_RETRIEVE_BACKUP_KEY_GUID
    request['pDataIn'] = NULL
    request['cbDataIn'] = 0
    request['dwParam'] = 0
    resp = dce.request(request)
    resp.dump()
    #print "LEN: %d" % len(''.join(resp['ppDataOut']))
    #hexdump(''.join(resp['ppDataOut']))
    cert = x509.load_der_x509_certificate(b''.join(resp['ppDataOut']), default_backend())
    print(cert.subject)
    print(cert.issuer)
    print(cert.signature)