Package: enochecker
EnoCheckerThis is the checker lib that shall be used by all checkers in ENOWARS3 and ENOWARS4.For a simple checker, subclassenochecker.BaseChecker.fromenocheckerimportBaseChecker,BrokenServiceException,runclassAwesomeChecker(BaseChecker):defputflag(self):# type: () -> None# TODO: Put flag to serviceself.debug("flag is{}".format(self.flag))self.http_post("/putflaghere",params={"flag":self.flag})# ...defgetflag(self):# type: () -> None# tTODO: Get the flag.ifnotself.http_get("/getflag")==self.flag:raiseBrokenServiceException("Ooops, wrong Flag")defputnoise(self):# put some noisewithself.connect()astelnet:telnet.write(self.noise)defgetnoise(self):withself.connect()astelnet:telnet.write("gimmeflag\n")telnet.read_expect(self.noise)defhavoc(self):self.http("FUNFUN").text=="FUNFUN"if__name__=="__main__":run(AwesomeChecker)A full example, including helpful comments, can be found inexamplechecker.py.The full documentation (still in progress) is available onenowars.github.io/enochecker.(There is some not yet ported information in the olddocs/usage.md.)InstallationThe latest stable version of the library is available on pip:pip install enocheckerTo access the development version, the library can be installed using pip/git, like:pip install git+https://github.com/enowars/enocheckerLaunch CheckerThe goal is to have checkers launched via gunicorn or uSWGI and the Engine talking to it via http.
For testing, however, you can use the commandline instead:usage: check.py run [-h] [-a ADDRESS] [-n TEAM_NAME] [-r ROUND] [-f FLAG]
                    [-t MAX_TIME] [-i CALL_IDX] [-p [PORT]]
                    {putflag,getflag,putnoise,getnoise,havoc,listen}

positional arguments:
  {putflag,getflag,putnoise,getnoise,havoc,listen}
                        The Method, one of ['putflag', 'getflag', 'putnoise',
                        'getnoise', 'havoc'] or "listen" to start checker
                        service

optional arguments:
  -h, --help            show this help message and exit
  -a ADDRESS, --address ADDRESS
                        The ip or address of the remote team to check
  -n TEAM_NAME, --team_name TEAM_NAME
                        The teamname of the team to check
  -r ROUND, --round ROUND
                        The round we are in right now
  -f FLAG, --flag FLAG  The Flag, a Fake flag or a Unique ID, depending on the
                        mode
  -t MAX_TIME, --max_time MAX_TIME
                        The maximum amount of time the script has to execute
                        in seconds
  -i CALL_IDX, --call_idx CALL_IDX
                        Unique numerical index per round. Each id only occurs
                        once and is tighly packed, starting with 0. In a
                        service supporting multiple flags, this would be used
                        to decide which flag to place.
  -p [PORT], --port [PORT]
                        The port the checker should attackWhy use it at all?Many nice features for CTF Checker writing, obviously.
Also, under-the-hood changes on the Engine can be made without any problems.For further instructions on how to write a checker with this Framework look atdocs/usage.md.Now, code away :).