An Enigma machine simulator with state and encoding display.
Currently support is only provided for those machine models in most widespread general use during the war years: the I, M3, and M4.
This is adapted, as an exercise in learning Haskell, from an earlier learning project written in Mathematica. It is my first Haskell program. A Python version with substantially the same API and command line interface, is also available.
Perform message encoding:
>>> enigmaEncoding (configEnigma "b-γ-V-VIII-II" "LFAP" "UX.MO.KZ.AY.EF.PL" "03.17.04.11") "KRIEG"
"GOWNW"
>>> let cfg = configEnigma "c-β-V-VI-VIII" "CDTJ" "AE.BF.CM.DQ.HU.JN.LX.PR.SZ.VW" "05.16.05.12"
>>> putStr $ showEnigmaEncoding cfg "FOLGENDES IST SOFORT BEKANNTZUGEBEN"
RBBF PMHP HGCZ XTDY GAHG UFXG EWKB LKGJ
Show configuration details:
>>> let cfg = configEnigma "b-γ-V-VIII-II" "LFAQ" "UX.MO.KZ.AY.EF.PL" "03.17.04.11"
>>> putStr $ displayEnigmaConfig cfg 'K' displayOpts{format="internal"}
K > ABCDEFGHIJK̲̅LMNOPQRSTUVWXYZ
P YBCDFEGHIJZ̲̅PONMLQRSTXVWUAK UX.MO.KZ.AY.EF.PL
1 LORVFBQNGWKATHJSZPIYUDXEMC̲̅ Q 07 II
2 BJY̲̅INTKWOARFEMVSGCUDPHZQLX A 24 VIII
3 ILHXUBZQPNVGKMCRTEJFADOYS̲̅W F 16 V
4 YDSKZPTNCHGQOMXAUWJ̲̅FBRELVI L 10 γ
R ENKQAUYWJI̲̅COPBLMDXZVFTHRGS b
4 PUIBWTKJZ̲̅SDXNHMFLVCGQYROAE γ
3 UFOVRTLCASMBNJWIHPYQEKZDXG̲̅ V
2 JARTMLQ̲̅VDBGYNEIUXKPFSOHZCW VIII
1 LFZVXEINSOKAYHBRG̲̅CPMUDJWTQ II
P YBCDFEG̲̅HIJZPONMLQRSTXVWUAK UX.MO.KZ.AY.EF.PL
G < CMAWFEKLNVG̲̅HBIUYTXZQOJDRPS
Simulate machine operation:
>>> let cfg = configEnigma "b-γ-V-VIII-II" "LFAP" "UX.MO.KZ.AY.EF.PL" "03.17.04.11"
>>> putStr $ displayEnigmaOperation cfg "KRIEG" displayOpts
OHNKJYSBTEDMLCARWPGIXZQUFV LFAP 10 16 24 06
K > CMAWFEKLNVG̲̅HBIUYTXZQOJDRPS LFAQ 10 16 24 07
R > HXETCUMASQNZGKRYJO̲̅IDFWVBPL LFAR 10 16 24 08
I > FGRJUABYW̲̅DZSXVQTOCLPENIMHK LFAS 10 16 24 09
E > SJWYN̲̅UZPQBVXRETHIMAOFKCLDG LFAT 10 16 24 10
G > EOKPAQW̲̅JLHCISTBDFVMNXRGUZY LFAU 10 16 24 11
A command line executable, enigma (accessible if installed on the path or through stack exec -- enigma) for local
Haskell installations, provides almost all the functionality of the API.
Encode messages:
$ enigma encode "B-I-III-I EMO UX.MO.AY 13.04.11" "TESTINGXTESTINGUD"
OZQK PFLP YZRP YTFV U
$ enigma encode "B-I-III-I EMO UX.MO.AY 13.04.11" "OZQKPFLPYZRPYTFVU"
TEST INGX TEST INGU D
Show configuration details (explained in more detail in the command line help):
$ enigma show "B-I-III-I EMO UX.MO.AY 13.04.11" -l 'X' -H'()' -f internal
X > ABCDEFGHIJKLMNOPQRSTUVW(X)YZ
P YBCDEFGHIJKLONMPQRSTXVW(U)AZ UX.MO.AY
1 HCZMRVJPKSUDTQOLWEXN(Y)FAGIB O 05 I
2 KOMQEPVZNXRBDLJHFSUWYACT(G)I M 10 III
3 AXIQJZ(K)RMSUNTOLYDHVBWEGPFC E 19 I
R YRUHQSLDPX(N)GOKMIEBFZCWVJAT B
3 ATZQVYWRCEGOI(L)NXDHJMKSUBPF I
2 VLWMEQYPZOA(N)CIBFDKRXSGTJUH III
1 WZBLRVXAYGIPD(T)OHNEJMKFQSUC I
P YBCDEFGHIJKLONMPQRS(T)XVWUAZ UX.MO.AY
T < CNAUJVQSLEMIKBZRGPHXDFY(T)WO
Simulate machine operation (explained in more detail command line help):
$ enigma run "B-I-III-I EMO UX.MO.AY 13.04.11" -m "TESTING" -t -H'()'
0000 CNAUJVQSLEMIKBZRGPHXDFYTWO EMO 19 10 05
0001 T > UNXKGVERLYDIQBTWMHZ(O)AFPCJS EMP 19 10 06
0002 E > QTYJ(Z)XUPKDIMLSWHAVNBGROFCE EMQ 19 10 07
0003 S > DMXAPTRWKYINBLUESG(Q)FOZHCJV ENR 19 11 08
0004 T > IUSMHRPEAQTVDYWGJFC(K)BLOZNX ENS 19 11 09
0005 I > WMVXQRLS(P)YOGBTKIEFHNZCADJU ENT 19 11 10
0006 N > WKIQXNRSCVBOY(F)LUDGHZPJAEMT ENU 19 11 11
0007 G > RVPTWS(L)KYXHGNMQCOAFDZBEJIU ENV 19 11 12
Watch the machine as it runs for 500 steps:
$ enigma run "c-β-VIII-VII-VI QMLI UX.MO.AY 01.13.04.11" -s 500 -t -f internal -o
Note that the correct display of some characters used to represent components (thin Naval rotors) assumes support for Unicode, while some aspects of the display of machine state depend on support for combining Unicode. This is a known limitation that will be addressed in a future release.
Versions of this package have been part of Stackage LTS Haskell since LTS 7.24, and the current version will work with LTS since 3.2.2. For information on which GHC versions are supported by each release, see the package's Hackage Matrix.
Full documentation — for the latest release version — is available on Hackage. Documentation for the current Stackage LTS version — generally identical to the latest release version — is avalable on Stackage.
For other Haskell Enigma machines see:
This package served as the basis for a Python version, with essentially the same API, though more active maintenance of this verson has resulted in some minor divergence.
I'm currently learning and experimenting with some Haskell language features and can't promise the development version will work. More detail about planned releases and activities can be found the list of scheduled milestones and in the list of open issues. Some recent activity includes:
- changes since the latest Hackage release version;
- the addition of a command line interface which incorporates extensive changes including refactoring of display functions; and
- breaking API changes
including removal of deprecated display
functions and change to handling of errors with
Either.