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Bombe: add note about rotor step in crib

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s2224834 2019-02-09 23:01:52 +00:00
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commit dd9cbbac77
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8
src/core/lib/Bombe.mjs
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@ -281,6 +281,14 @@ export class BombeMachine {
* ciphertext. It will check that the crib is sane (length is vaguely sensible and there's no
* matching characters between crib and ciphertext) but cannot check further - if it's wrong
* your results will be wrong!
*
* There is also no handling of rotor stepping - if the target Enigma stepped in the middle of
* your crib, you're out of luck. TODO: Allow specifying a step point - this is fairly easy to
* configure on a real Bombe, but we're not clear on whether it was ever actually done for
* real (there would almost certainly have been better ways of attacking in most situations
* than attempting to exhaust options for the stepping point, but in some circumstances, e.g.
* via Banburismus, the stepping point might have been known).
*
* @param {string[]} rotors - list of rotor spec strings (without step points!)
* @param {Object} reflector - Reflector object
* @param {string} ciphertext - The ciphertext to attack