An enigma implementation in Scala
Disclaimer : Plug board functionality has not yet been implemented.
To run the program, first compile with
> scalac Enigma.scala Parser.scala Rotor.scala Reflector.scala
Then run
> scala Enigma -decrypt RotorPositions(ex: I,IV,III) notchPositions(ex: 0,25) StartPositions(ex: A,E,P) optional:[file]
Where RotorPositions is the placement of rotors [I-V] in the intended spots from left to right (i.e. the last rotor you give will be the right-most rotor on the machine), the notchPostion is essentially the inner ring placement on the real machines (at what point will the right rotor shift the left one), and startPostion is the start postion of the rotors, again from left to right. For the notch position, just specify it for the two rightmost rotors, as the leftmost cannot rotate anything. You can either provide a filename as the last argument or leave it blank in which case you will be prompted to enter text. Two flags can be used, either -decrypt or -encrypt, even though they are identical in practice.
The wiring of the rotors I through V is the same as in the original enigma machine (model used by the German army and airforce).