ndnSIM

Yes. There is such function inside ValidatorConfig. The task here is to supply proper config section to the manager without having the configuration file (which doesn't and shouldn't exist in the simulation scenario).

I agree with Alex, the simulator does not really need to have the validation config. If it is really needed, one can specify a trust-anchor with type "any" to disable validation, as described in http://named-data.net/doc/ndn-cxx/current/tutorials/security-validator-config.html#trust-anchors