#Enigma simulator mac code#
#Enigma simulator mac simulator#

#Enigma simulator mac simulator#

Now lets get the other 20 machines working.Īn interesting thing about this simulator is that it is continuously calculating the path through the rotors for the current key pressed. The four rotor M4 Enigma Machine is working 100%. The authors are very grateful for this simulator, as it provided the rotor strings and it is used extensively to check the accuracy of Mega Enigma results.

#Enigma simulator mac code#

Read more about the Umkehrwalze D (UKW-D) here:ĭelve into the code to make this work here: Some work remains to be done to check the validity of the reflector pairs and to allow editing the pairs in UD mode. They are completely different wires, they are grouped by the initial letter for convenience only. Notice that C-W(BP) bridges contacts 2-22 and C-T(UD) bridges 24-7. Precomputing the UDTOBP string makes translating different pair of wires with the same initial letter (C-W and C-T) as easy as doing three table lookups. Starting with the blue letters in the inside, it records the black letters on the outside. The second string was pre-computed for this project instead of dynamically generating it for each search.

Starting with the black letters in the outside (BP notation), it records the blue letters on the inside (UD notation). The first string comes straight from the Crypto Museum pages. This led to the following gems:Ĭonst _FlashStringHelper *BPTOUD = F('A-ZXWVUTSRQPON-MLKIHGFEDCB') Ĭonst _FlashStringHelper *UDTOBP = F('AZYXWVUTS-RQPNMLKJIHGFED-C') The simulator uses BP notation internally to calculate the path through the rotors, but it gives the option to show the UKWD pairs in both UD and BP notations. Complicating things is the fact that both notations run in different directions and that a different pair of letters are missing from each, B-O from BP notation and J-Y from UD notation. The UKWD pairs can be displayed in two notations, Bletchley Park (BP) and the German notation used in the official key sheets (UD). The UKWD sub menu has two special features, it is skipped if the currently selected machine did not have a D reflector, and the user cannot leave that menu until the pairs specified are correct. It is just a matter of inserting an item in the existing menu system. The 5 reflectors included are examples of known wirings used at some point in time.A mechanism was needed to change the actual wiring of the reflector in this simulator.Īdding an item now to the menu system is easier than developing it from scratch. The D reflector wiring can be changed in the field. This simulator already had 5 UKWD rewirable reflectors, 4 were available to be used with the M3 machine, the other with the KD.