hash help !

[jet speed]

Hi
Is there a way, i can build an %hash from a file as Input. Appreciate you
help with this.

file.txt
----------------

22:5a => 10.00.00.00.aa.56.9b.7a
32:9c => 10.00.00.00.aa.46.9b.33
a2:cc=> 10.00.00.00.aa.5a.9b.63

Thanks
Sj