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# circus-manager [](https://goreportcard.com/report/git.darknebu.la/circus/circus-manager)
This container will provide the challenges for the companion container making it possible to dynamically change challenges and host the circus in docker-swarm. It will serve as a central manager making it possible to controll the challenge properties such as name, desription, flag, container to run, points and other.
## Function
The challenge-manager is part of the docker swarm providing the challenges for
the individual companion containers.
The spawned companion containers access the challenge-manager, requesting the
challenges, recieving them and hosting them for the users.
In order to not transfer the flag over a possibly insecure connection, the
sha256 sum of the flag is transmitted. The companion containers can verify the
flag by hashing it (sha256), comparing the hashes and so defining if a challenge
is solved or not.
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