Make key size an optional variable
Make key size an optional variable

This is to help in cases where the key size is not known beforehand

sealz/Heimdall,henrinormak/Heimdall,nathankot/Heimdall,henrinormak/Heimdall,navisingh/Heimdall,navisingh/Heimdall,nathankot/Heimdall,sealz/Heimdall