#DES加密算法的實現

#M?->?Mlist?->?IPM?->?EIPM?->?KEIPM?->?SKEIPM?->?PSKEIPM?->?C
#????????????^??????^???????^????????^?????????^?????????^
#????????????|??????|???????|????????|?????????|?????????|
#?????????IP置換?擴展E變換?K加密??S盒變換???P盒變換???逆IP置換
#???????????????????????????^
#???????????????????????????|
#???????????????????????????PC置換



#!/usr/bin/env?python3.4
#?coding=utf-8

#8?*?8
IP?=?[58504234261810?2
??????60524436282012?4
??????62544638302214?6
??????64564840322416?8
??????574941332517?9?1
??????59514335271911?3
??????61534537292113?5
??????63554739312315?7]
#8?*?8
IP_1=[40?8481656246432
??????39?7471555236331
??????38?6461454226230
??????37?5451353216129
??????36?4441252206028
??????35?3431151195927
??????34?2421050185826
??????33?141?949175725]
#6?*?8
E?=?[32?1?2?3?4?5
??????4?5?6?7?8?9
??????8?910111213
?????121314151617
?????161718192021
?????202122232425
?????242526272829
?????2829303132?1]
#1?*?8
SCASE?=?[“S1““S2““S3““S4““S5““S6““S7““S8“]
#8?*?（4?*?16）
SD?=?{“S1“:[[1441312151183106125907]
????????????[0157414213110612119538]
????????????[4114813621115129731050]
????????????[1512824917511314100613]]
??????“S2“:[[1518146113497213120510]
????????????[3134715281412011069115]
????????????[0147111041315812693215]
????????????[1381013154211671205149]]
??????“S3“:[[1009146315511312711428]
????????????[1370934610285141211151]
????????????[1364981530111212510147]
????????????[1101306987415143115212]]
??????“S4“:[[7131430691012851112415]
????????????[1381156150347212110149]
????????????[1069012117131513145284]
????????????[3150610113894511127214]]
??????“S5“:[[2124171011685315130149]
????????????[1411212471315015103986]
????????????[4211110137815912563014]
????????????[1181271142136150910453]]
??????“S6“:[[1211015926801334147511]
????????????[1015427129561131401138]
????????????[9141552812370410113116]
????????????[4321295151011141760813]]
??????“S7“:[[4112141508133129751061]
????????????[1301174911014351221586]
????????????[1411131237141015680592]
????????????[6111381410795015142312]]
??????“S8“:[[1328461511110931450127]
????????????[1151381037412561101492]
????????????[7114191214206101315358]
????????????[2114741081315129035611]]
????????????}
#8?*?4?=?32
P?=?[16?72021
?????29122817