using System; namespace Renci.SshNet.Security.Cryptography.Ciphers { public sealed class CastCipher : BlockCipher { internal static readonly int MAX_ROUNDS = 16; internal static readonly int RED_ROUNDS = 12; private readonly int[] _kr = new int[17]; private readonly uint[] _km = new uint[17]; private int _rounds = MAX_ROUNDS; internal static readonly uint[] S1 = new uint[256] { 821772500, 2678128395, 1810681135, 1059425402, 505495343, 2617265619, 1610868032, 3483355465, 3218386727, 2294005173, 3791863952, 2563806837, 1852023008, 365126098, 3269944861, 584384398, 677919599, 3229601881, 4280515016, 2002735330, 1136869587, 3744433750, 2289869850, 2731719981, 2714362070, 879511577, 1639411079, 575934255, 717107937, 2857637483, 576097850, 2731753936, 1725645000, 2810460463, 5111599, 767152862, 2543075244, 1251459544, 1383482551, 3052681127, 3089939183, 3612463449, 1878520045, 1510570527, 2189125840, 2431448366, 582008916, 3163445557, 1265446783, 1354458274, 3529918736, 3202711853, 3073581712, 3912963487, 3029263377, 1275016285, 4249207360, 2905708351, 3304509486, 1442611557, 3585198765, 2712415662, 2731849581, 3248163920, 2283946226, 208555832, 2766454743, 1331405426, 1447828783, 3315356441, 3108627284, 2957404670, 2981538698, 3339933917, 1669711173, 286233437, 1465092821, 1782121619, 3862771680, 710211251, 980974943, 1651941557, 430374111, 2051154026, 704238805, 4128970897, 3144820574, 2857402727, 948965521, 3333752299, 2227686284, 718756367, 2269778983, 2731643755, 718440111, 2857816721, 3616097120, 1113355533, 2478022182, 410092745, 1811985197, 1944238868, 2696854588, 1415722873, 1682284203, 1060277122, 1998114690, 1503841958, 82706478, 2315155686, 1068173648, 845149890, 2167947013, 1768146376, 1993038550, 3566826697, 3390574031, 940016341, 3355073782, 2328040721, 904371731, 1205506512, 4094660742, 2816623006, 825647681, 85914773, 2857843460, 1249926541, 1417871568, 3287612, 3211054559, 3126306446, 1975924523, 1353700161, 2814456437, 2438597621, 1800716203, 722146342, 2873936343, 1151126914, 4160483941, 2877670899, 458611604, 2866078500, 3483680063, 770352098, 2652916994, 3367839148, 3940505011, 3585973912, 3809620402, 718646636, 2504206814, 2914927912, 3631288169, 2857486607, 2860018678, 575749918, 2857478043, 718488780, 2069512688, 3548183469, 453416197, 1106044049, 3032691430, 52586708, 3378514636, 3459808877, 3211506028, 1785789304, 218356169, 3571399134, 3759170522, 1194783844, 1523787992, 3007827094, 1975193539, 2555452411, 1341901877, 3045838698, 3776907964, 3217423946, 2802510864, 2889438986, 1057244207, 1636348243, 3761863214, 1462225785, 2632663439, 481089165, 718503062, 24497053, 3332243209, 3344655856, 3655024856, 3960371065, 1195698900, 2971415156, 3710176158, 2115785917, 4027663609, 3525578417, 2524296189, 2745972565, 3564906415, 1372086093, 1452307862, 2780501478, 1476592880, 3389271281, 18495466, 2378148571, 901398090, 891748256, 3279637769, 3157290713, 2560960102, 1447622437, 4284372637, 216884176, 2086908623, 1879786977, 3588903153, 2242455666, 2938092967, 3559082096, 2810645491, 758861177, 1121993112, 215018983, 642190776, 4169236812, 1196255959, 2081185372, 3508738393, 941322904, 4124243163, 2877523539, 1848581667, 2205260958, 3180453958, 2589345134, 3694731276, 550028657, 2519456284, 3789985535, 2973870856, 2093648313, 443148163, 46942275, 2734146937, 1117713533, 1115362972, 1523183689, 3717140224, 1551984063 }; internal static readonly uint[] S2 = new uint[256] { 522195092, 4010518363, 1776537470, 960447360, 4267822970, 4005896314, 1435016340, 1929119313, 2913464185, 1310552629, 3579470798, 3724818106, 2579771631, 1594623892, 417127293, 2715217907, 2696228731, 1508390405, 3994398868, 3925858569, 3695444102, 4019471449, 3129199795, 3770928635, 3520741761, 990456497, 4187484609, 2783367035, 21106139, 3840405339, 631373633, 3783325702, 532942976, 396095098, 3548038825, 4267192484, 2564721535, 2011709262, 2039648873, 620404603, 3776170075, 2898526339, 3612357925, 4159332703, 1645490516, 223693667, 1567101217, 3362177881, 1029951347, 3470931136, 3570957959, 1550265121, 119497089, 972513919, 907948164, 3840628539, 1613718692, 3594177948, 465323573, 2659255085, 654439692, 2575596212, 2699288441, 3127702412, 277098644, 624404830, 4100943870, 2717858591, 546110314, 2403699828, 3655377447, 1321679412, 4236791657, 1045293279, 4010672264, 895050893, 2319792268, 494945126, 1914543101, 2777056443, 3894764339, 2219737618, 311263384, 4275257268, 3458730721, 669096869, 3584475730, 3835122877, 3319158237, 3949359204, 2005142349, 2713102337, 2228954793, 3769984788, 569394103, 3855636576, 1425027204, 108000370, 2736431443, 3671869269, 3043122623, 1750473702, 2211081108, 762237499, 3972989403, 2798899386, 3061857628, 2943854345, 867476300, 964413654, 1591880597, 1594774276, 2179821409, 552026980, 3026064248, 3726140315, 2283577634, 3110545105, 2152310760, 582474363, 1582640421, 1383256631, 2043843868, 3322775884, 1217180674, 463797851, 2763038571, 480777679, 2718707717, 2289164131, 3118346187, 214354409, 200212307, 3810608407, 3025414197, 2674075964, 3997296425, 1847405948, 1342460550, 510035443, 4080271814, 815934613, 833030224, 1620250387, 1945732119, 2703661145, 3966000196, 1388869545, 3456054182, 2687178561, 2092620194, 562037615, 1356438536, 3409922145, 3261847397, 1688467115, 2150901366, 631725691, 3840332284, 549916902, 3455104640, 394546491, 837744717, 2114462948, 751520235, 2221554606, 2415360136, 3999097078, 2063029875, 803036379, 2702586305, 821456707, 3019566164, 360699898, 4018502092, 3511869016, 3677355358, 2402471449, 812317050, 49299192, 2570164949, 3259169295, 2816732080, 3331213574, 3101303564, 2156015656, 3705598920, 3546263921, 143268808, 3200304480, 1638124008, 3165189453, 3341807610, 578956953, 2193977524, 3638120073, 2333881532, 807278310, 658237817, 2969561766, 1641658566, 11683945, 3086995007, 148645947, 1138423386, 4158756760, 1981396783, 2401016740, 3699783584, 380097457, 2680394679, 2803068651, 3334260286, 441530178, 4016580796, 1375954390, 761952171, 891809099, 2183123478, 157052462, 3683840763, 1592404427, 341349109, 2438483839, 1417898363, 644327628, 2233032776, 2353769706, 2201510100, 220455161, 1815641738, 182899273, 2995019788, 3627381533, 3702638151, 2890684138, 1052606899, 588164016, 1681439879, 4038439418, 2405343923, 4229449282, 167996282, 1336969661, 1688053129, 2739224926, 1543734051, 1046297529, 1138201970, 2121126012, 115334942, 1819067631, 1902159161, 1941945968, 2206692869, 1159982321 }; internal static readonly uint[] S3 = new uint[256] { 2381300288, 637164959, 3952098751, 3893414151, 1197506559, 916448331, 2350892612, 2932787856, 3199334847, 4009478890, 3905886544, 1373570990, 2450425862, 4037870920, 3778841987, 2456817877, 286293407, 124026297, 3001279700, 1028597854, 3115296800, 4208886496, 2691114635, 2188540206, 1430237888, 1218109995, 3572471700, 308166588, 570424558, 2187009021, 2455094765, 307733056, 1310360322, 3135275007, 1384269543, 2388071438, 863238079, 2359263624, 2801553128, 3380786597, 2831162807, 1470087780, 1728663345, 4072488799, 1090516929, 532123132, 2389430977, 1132193179, 2578464191, 3051079243, 1670234342, 1434557849, 2711078940, 1241591150, 3314043432, 3435360113, 3091448339, 1812415473, 2198440252, 267246943, 796911696, 3619716990, 38830015, 1526438404, 2806502096, 374413614, 2943401790, 1489179520, 1603809326, 1920779204, 168801282, 260042626, 2358705581, 1563175598, 2397674057, 1356499128, 2217211040, 514611088, 2037363785, 2186468373, 4022173083, 2792511869, 2913485016, 1173701892, 4200428547, 3896427269, 1334932762, 2455136706, 602925377, 2835607854, 1613172210, 41346230, 2499634548, 2457437618, 2188827595, 41386358, 4172255629, 1313404830, 2405527007, 3801973774, 2217704835, 873260488, 2528884354, 2478092616, 4012915883, 2555359016, 2006953883, 2463913485, 575479328, 2218240648, 2099895446, 660001756, 2341502190, 3038761536, 3888151779, 3848713377, 3286851934, 1022894237, 1620365795, 3449594689, 1551255054, 15374395, 3570825345, 4249311020, 4151111129, 3181912732, 310226346, 1133119310, 530038928, 136043402, 2476768958, 3107506709, 2544909567, 1036173560, 2367337196, 1681395281, 1758231547, 3641649032, 306774401, 1575354324, 3716085866, 1990386196, 3114533736, 2455606671, 1262092282, 3124342505, 2768229131, 4210529083, 1833535011, 423410938, 660763973, 2187129978, 1639812000, 3508421329, 3467445492, 310289298, 272797111, 2188552562, 2456863912, 310240523, 677093832, 1013118031, 901835429, 3892695601, 1116285435, 3036471170, 1337354835, 243122523, 520626091, 277223598, 4244441197, 4194248841, 1766575121, 594173102, 316590669, 742362309, 3536858622, 4176435350, 3838792410, 2501204839, 1229605004, 3115755532, 1552908988, 2312334149, 979407927, 3959474601, 1148277331, 176638793, 3614686272, 2083809052, 40992502, 1340822838, 2731552767, 3535757508, 3560899520, 1354035053, 122129617, 7215240, 2732932949, 3118912700, 2718203926, 2539075635, 3609230695, 3725561661, 1928887091, 2882293555, 1988674909, 2063640240, 2491088897, 1459647954, 4189817080, 2302804382, 1113892351, 2237858528, 1927010603, 4002880361, 1856122846, 1594404395, 2944033133, 3855189863, 3474975698, 1643104450, 4054590833, 3431086530, 1730235576, 2984608721, 3084664418, 2131803598, 4178205752, 267404349, 1617849798, 1616132681, 1462223176, 736725533, 2327058232, 551665188, 2945899023, 1749386277, 2575514597, 1611482493, 674206544, 2201269090, 3642560800, 728599968, 1680547377, 2620414464, 1388111496, 453204106, 4156223445, 1094905244, 2754698257, 2201108165, 3757000246, 2704524545, 3922940700, 3996465027 }; internal static readonly uint[] S4 = new uint[256] { 2645754912, 532081118, 2814278639, 3530793624, 1246723035, 1689095255, 2236679235, 4194438865, 2116582143, 3859789411, 157234593, 2045505824, 4245003587, 1687664561, 4083425123, 605965023, 672431967, 1336064205, 3376611392, 214114848, 4258466608, 3232053071, 489488601, 605322005, 3998028058, 264917351, 1912574028, 756637694, 436560991, 202637054, 135989450, 85393697, 2152923392, 3896401662, 2895836408, 2145855233, 3535335007, 115294817, 3147733898, 1922296357, 3464822751, 4117858305, 1037454084, 2725193275, 2127856640, 1417604070, 1148013728, 1827919605, 642362335, 2929772533, 909348033, 1346338451, 3547799649, 297154785, 1917849091, 4161712827, 2883604526, 3968694238, 1469521537, 3780077382, 3375584256, 1763717519, 136166297, 4290970789, 1295325189, 2134727907, 2798151366, 1566297257, 3672928234, 2677174161, 2672173615, 965822077, 2780786062, 289653839, 1133871874, 3491843819, 35685304, 1068898316, 418943774, 672553190, 642281022, 2346158704, 1954014401, 3037126780, 4079815205, 2030668546, 3840588673, 672283427, 1776201016, 359975446, 3750173538, 555499703, 2769985273, 1324923, 69110472, 152125443, 3176785106, 3822147285, 1340634837, 798073664, 1434183902, 15393959, 216384236, 1303690150, 3881221631, 3711134124, 3960975413, 106373927, 2578434224, 1455997841, 1801814300, 1578393881, 1854262133, 3188178946, 3258078583, 2302670060, 1539295533, 3505142565, 3078625975, 2372746020, 549938159, 3278284284, 2620926080, 181285381, 2865321098, 3970029511, 68876850, 488006234, 1728155692, 2608167508, 836007927, 2435231793, 919367643, 3339422534, 3655756360, 1457871481, 40520939, 1380155135, 797931188, 234455205, 2255801827, 3990488299, 397000196, 739833055, 3077865373, 2871719860, 4022553888, 772369276, 390177364, 3853951029, 557662966, 740064294, 1640166671, 1699928825, 3535942136, 622006121, 3625353122, 68743880, 1742502, 219489963, 1664179233, 1577743084, 1236991741, 410585305, 2366487942, 823226535, 1050371084, 3426619607, 3586839478, 212779912, 4147118561, 1819446015, 1911218849, 530248558, 3486241071, 3252585495, 2886188651, 3410272728, 2342195030, 20547779, 2982490058, 3032363469, 3631753222, 312714466, 1870521650, 1493008054, 3491686656, 615382978, 4103671749, 2534517445, 1932181, 2196105170, 278426614, 6369430, 3274544417, 2913018367, 697336853, 2143000447, 2946413531, 701099306, 1558357093, 2805003052, 3500818408, 2321334417, 3567135975, 216290473, 3591032198, 23009561, 1996984579, 3735042806, 2024298078, 3739440863, 569400510, 2339758983, 3016033873, 3097871343, 3639523026, 3844324983, 3256173865, 795471839, 2951117563, 4101031090, 4091603803, 3603732598, 971261452, 534414648, 428311343, 3389027175, 2844869880, 694888862, 1227866773, 2456207019, 3043454569, 2614353370, 3749578031, 3676663836, 459166190, 4132644070, 1794958188, 51825668, 2252611902, 3084671440, 2036672799, 3436641603, 1099053433, 2469121526, 3059204941, 1323291266, 2061838604, 1018778475, 2233344254, 2553501054, 334295216, 3556750194, 1065731521, 183467730 }; internal static readonly uint[] S5 = new uint[256] { 2127105028, 745436345, 2601412319, 2788391185, 3093987327, 500390133, 1155374404, 389092991, 150729210, 3891597772, 3523549952, 1935325696, 716645080, 946045387, 2901812282, 1774124410, 3869435775, 4039581901, 3293136918, 3438657920, 948246080, 363898952, 3867875531, 1286266623, 1598556673, 68334250, 630723836, 1104211938, 1312863373, 613332731, 2377784574, 1101634306, 441780740, 3129959883, 1917973735, 2510624549, 3238456535, 2544211978, 3308894634, 1299840618, 4076074851, 1756332096, 3977027158, 297047435, 3790297736, 2265573040, 3621810518, 1311375015, 1667687725, 47300608, 3299642885, 2474112369, 201668394, 1468347890, 576830978, 3594690761, 3742605952, 1958042578, 1747032512, 3558991340, 1408974056, 3366841779, 682131401, 1033214337, 1545599232, 4265137049, 206503691, 103024618, 2855227313, 1337551222, 2428998917, 2963842932, 4015366655, 3852247746, 2796956967, 3865723491, 3747938335, 247794022, 3755824572, 702416469, 2434691994, 397379957, 851939612, 2314769512, 218229120, 1380406772, 62274761, 214451378, 3170103466, 2276210409, 3845813286, 28563499, 446592073, 1693330814, 3453727194, 29968656, 3093872512, 220656637, 2470637031, 77972100, 1667708854, 1358280214, 4064765667, 2395616961, 325977563, 4277240721, 4220025399, 3605526484, 3355147721, 811859167, 3069544926, 3962126810, 652502677, 3075892249, 4132761541, 3498924215, 1217549313, 3250244479, 3858715919, 3053989961, 1538642152, 2279026266, 2875879137, 574252750, 3324769229, 2651358713, 1758150215, 141295887, 2719868960, 3515574750, 4093007735, 4194485238, 1082055363, 3417560400, 395511885, 2966884026, 179534037, 3646028556, 3738688086, 1092926436, 2496269142, 257381841, 3772900718, 1636087230, 1477059743, 2499234752, 3811018894, 2675660129, 3285975680, 90732309, 1684827095, 1150307763, 1723134115, 3237045386, 1769919919, 1240018934, 815675215, 750138730, 2239792499, 1234303040, 1995484674, 138143821, 675421338, 1145607174, 1936608440, 3238603024, 2345230278, 2105974004, 323969391, 779555213, 3004902369, 2861610098, 1017501463, 2098600890, 2628620304, 2940611490, 2682542546, 1171473753, 3656571411, 3687208071, 4091869518, 393037935, 159126506, 1662887367, 1147106178, 391545844, 3452332695, 1891500680, 3016609650, 1851642611, 546529401, 1167818917, 3194020571, 2848076033, 3953471836, 575554290, 475796850, 4134673196, 450035699, 2351251534, 844027695, 1080539133, 86184846, 1554234488, 3692025454, 1972511363, 2018339607, 1491841390, 1141460869, 1061690759, 4244549243, 2008416118, 2351104703, 2868147542, 1598468138, 722020353, 1027143159, 212344630, 1387219594, 1725294528, 3745187956, 2500153616, 458938280, 4129215917, 1828119673, 544571780, 3503225445, 2297937496, 1241802790, 267843827, 2694610800, 1397140384, 1558801448, 3782667683, 1806446719, 929573330, 2234912681, 400817706, 616011623, 4121520928, 3603768725, 1761550015, 1968522284, 4053731006, 4192232858, 4005120285, 872482584, 3140537016, 3894607381, 2287405443, 1963876937, 3663887957, 1584857000, 2975024454, 1833426440, 4025083860 }; internal static readonly uint[] S6 = new uint[256] { 4143615901, 749497569, 1285769319, 3795025788, 2514159847, 23610292, 3974978748, 844452780, 3214870880, 3751928557, 2213566365, 1676510905, 448177848, 3730751033, 4086298418, 2307502392, 871450977, 3222878141, 4110862042, 3831651966, 2735270553, 1310974780, 2043402188, 1218528103, 2736035353, 4274605013, 2702448458, 3936360550, 2693061421, 162023535, 2827510090, 687910808, 23484817, 3784910947, 3371371616, 779677500, 3503626546, 3473927188, 4157212626, 3500679282, 4248902014, 2466621104, 3899384794, 1958663117, 925738300, 1283408968, 3669349440, 1840910019, 137959847, 2679828185, 1239142320, 1315376211, 1547541505, 1690155329, 739140458, 3128809933, 3933172616, 3876308834, 905091803, 1548541325, 4040461708, 3095483362, 144808038, 451078856, 676114313, 2861728291, 2469707347, 993665471, 373509091, 2599041286, 4025009006, 4170239449, 2149739950, 3275793571, 3749616649, 2794760199, 1534877388, 572371878, 2590613551, 1753320020, 3467782511, 1405125690, 4270405205, 633333386, 3026356924, 3475123903, 632057672, 2846462855, 1404951397, 3882875879, 3915906424, 195638627, 2385783745, 3902872553, 1233155085, 3355999740, 2380578713, 2702246304, 2144565621, 3663341248, 3894384975, 2502479241, 4248018925, 3094885567, 1594115437, 572884632, 3385116731, 767645374, 1331858858, 1475698373, 3793881790, 3532746431, 1321687957, 619889600, 1121017241, 3440213920, 2070816767, 2833025776, 1933951238, 4095615791, 890643334, 3874130214, 859025556, 360630002, 925594799, 1764062180, 3920222280, 4078305929, 979562269, 2810700344, 4087740022, 1949714515, 546639971, 1165388173, 3069891591, 1495988560, 922170659, 1291546247, 2107952832, 1813327274, 3406010024, 3306028637, 4241950635, 153207855, 2313154747, 1608695416, 1150242611, 1967526857, 721801357, 1220138373, 3691287617, 3356069787, 2112743302, 3281662835, 1111556101, 1778980689, 250857638, 2298507990, 673216130, 2846488510, 3207751581, 3562756981, 3008625920, 3417367384, 2198807050, 529510932, 3547516680, 3426503187, 2364944742, 102533054, 2294910856, 1617093527, 1204784762, 3066581635, 1019391227, 1069574518, 1317995090, 1691889997, 3661132003, 510022745, 3238594800, 1362108837, 1817929911, 2184153760, 805817662, 1953603311, 3699844737, 120799444, 2118332377, 207536705, 2282301548, 4120041617, 145305846, 2508124933, 3086745533, 3261524335, 1877257368, 2977164480, 3160454186, 2503252186, 4221677074, 759945014, 254147243, 2767453419, 3801518371, 629083197, 2471014217, 907280572, 3900796746, 940896768, 2751021123, 2625262786, 3161476951, 3661752313, 3260732218, 1425318020, 2977912069, 1496677566, 3988592072, 2140652971, 3126511541, 3069632175, 977771578, 1392695845, 1698528874, 1411812681, 1369733098, 1343739227, 3620887944, 1142123638, 67414216, 3102056737, 3088749194, 1626167401, 2546293654, 3941374235, 697522451, 33404913, 143560186, 2595682037, 994885535, 1247667115, 3859094837, 2699155541, 3547024625, 4114935275, 2968073508, 3199963069, 2732024527, 1237921620, 951448369, 1898488916, 1211705605, 2790989240, 2233243581, 3598044975 }; internal static readonly uint[] S7 = new uint[256] { 2246066201, 858518887, 1714274303, 3485882003, 713916271, 2879113490, 3730835617, 539548191, 36158695, 1298409750, 419087104, 1358007170, 749914897, 2989680476, 1261868530, 2995193822, 2690628854, 3443622377, 3780124940, 3796824509, 2976433025, 4259637129, 1551479000, 512490819, 1296650241, 951993153, 2436689437, 2460458047, 144139966, 3136204276, 310820559, 3068840729, 643875328, 1969602020, 1680088954, 2185813161, 3283332454, 672358534, 198762408, 896343282, 276269502, 3014846926, 84060815, 197145886, 376173866, 3943890818, 3813173521, 3545068822, 1316698879, 1598252827, 2633424951, 1233235075, 859989710, 2358460855, 3503838400, 3409603720, 1203513385, 1193654839, 2792018475, 2060853022, 207403770, 1144516871, 3068631394, 1121114134, 177607304, 3785736302, 326409831, 1929119770, 2983279095, 4183308101, 3474579288, 3200513878, 3228482096, 119610148, 1170376745, 3378393471, 3163473169, 951863017, 3337026068, 3135789130, 2907618374, 1183797387, 2015970143, 4045674555, 2182986399, 2952138740, 3928772205, 384012900, 2454997643, 10178499, 2879818989, 2596892536, 111523738, 2995089006, 451689641, 3196290696, 235406569, 1441906262, 3890558523, 3013735005, 4158569349, 1644036924, 376726067, 1006849064, 3664579700, 2041234796, 1021632941, 1374734338, 2566452058, 371631263, 4007144233, 490221539, 206551450, 3140638584, 1053219195, 1853335209, 3412429660, 3562156231, 735133835, 1623211703, 3104214392, 2738312436, 4096837757, 3366392578, 3110964274, 3956598718, 3196820781, 2038037254, 3877786376, 2339753847, 300912036, 3766732888, 2372630639, 1516443558, 4200396704, 1574567987, 4069441456, 4122592016, 2699739776, 146372218, 2748961456, 2043888151, 35287437, 2596680554, 655490400, 1132482787, 110692520, 1031794116, 2188192751, 1324057718, 1217253157, 919197030, 686247489, 3261139658, 1028237775, 3135486431, 3059715558, 2460921700, 986174950, 2661811465, 4062904701, 2752986992, 3709736643, 367056889, 1353824391, 731860949, 1650113154, 1778481506, 784341916, 357075625, 3608602432, 1074092588, 2480052770, 3811426202, 92751289, 877911070, 3600361838, 1231880047, 480201094, 3756190983, 3094495953, 434011822, 87971354, 363687820, 1717726236, 1901380172, 3926403882, 2481662265, 400339184, 1490350766, 2661455099, 1389319756, 2558787174, 784598401, 1983468483, 30828846, 3550527752, 2716276238, 3841122214, 1765724805, 1955612312, 1277890269, 1333098070, 1564029816, 2704417615, 1026694237, 3287671188, 1260819201, 3349086767, 1016692350, 1582273796, 1073413053, 1995943182, 694588404, 1025494639, 3323872702, 3551898420, 4146854327, 453260480, 1316140391, 1435673405, 3038941953, 3486689407, 1622062951, 403978347, 817677117, 950059133, 4246079218, 3278066075, 1486738320, 1417279718, 481875527, 2549965225, 3933690356, 760697757, 1452955855, 3897451437, 1177426808, 1702951038, 4085348628, 2447005172, 1084371187, 3516436277, 3068336338, 1073369276, 1027665953, 3284188590, 1230553676, 1368340146, 2226246512, 267243139, 2274220762, 4070734279, 2497715176, 2423353163, 2504755875 }; internal static readonly uint[] S8 = new uint[256] { 3793104909, 3151888380, 2817252029, 895778965, 2005530807, 3871412763, 237245952, 86829237, 296341424, 3851759377, 3974600970, 2475086196, 709006108, 1994621201, 2972577594, 937287164, 3734691505, 168608556, 3189338153, 2225080640, 3139713551, 3033610191, 3025041904, 77524477, 185966941, 1208824168, 2344345178, 1721625922, 3354191921, 1066374631, 1927223579, 1971335949, 2483503697, 1551748602, 2881383779, 2856329572, 3003241482, 48746954, 1398218158, 2050065058, 313056748, 4255789917, 393167848, 1912293076, 940740642, 3465845460, 3091687853, 2522601570, 2197016661, 1727764327, 364383054, 492521376, 1291706479, 3264136376, 1474851438, 1685747964, 2575719748, 1619776915, 1814040067, 970743798, 1561002147, 2925768690, 2123093554, 1880132620, 3151188041, 697884420, 2550985770, 2607674513, 2659114323, 110200136, 1489731079, 997519150, 1378877361, 3527870668, 478029773, 2766872923, 1022481122, 431258168, 1112503832, 897933369, 2635587303, 669726182, 3383752315, 918222264, 163866573, 3246985393, 3776823163, 114105080, 1903216136, 761148244, 3571337562, 1690750982, 3166750252, 1037045171, 1888456500, 2010454850, 642736655, 616092351, 365016990, 1185228132, 4174898510, 1043824992, 2023083429, 2241598885, 3863320456, 3279669087, 3674716684, 108438443, 2132974366, 830746235, 606445527, 4173263986, 2204105912, 1844756978, 2532684181, 4245352700, 2969441100, 3796921661, 1335562986, 4061524517, 2720232303, 2679424040, 634407289, 885462008, 3294724487, 3933892248, 2094100220, 339117932, 4048830727, 3202280980, 1458155303, 2689246273, 1022871705, 2464987878, 3714515309, 353796843, 2822958815, 4256850100, 4052777845, 551748367, 618185374, 3778635579, 4020649912, 1904685140, 3069366075, 2670879810, 3407193292, 2954511620, 4058283405, 2219449317, 3135758300, 1120655984, 3447565834, 1474845562, 3577699062, 550456716, 3466908712, 2043752612, 881257467, 869518812, 2005220179, 938474677, 3305539448, 3850417126, 1315485940, 3318264702, 226533026, 965733244, 321539988, 1136104718, 804158748, 573969341, 3708209826, 937399083, 3290727049, 2901666755, 1461057207, 4013193437, 4066861423, 3242773476, 2421326174, 1581322155, 3028952165, 786071460, 3900391652, 3918438532, 1485433313, 4023619836, 3708277595, 3678951060, 953673138, 1467089153, 1930354364, 1533292819, 2492563023, 1346121658, 1685000834, 1965281866, 3765933717, 4190206607, 2052792609, 3515332758, 690371149, 3125873887, 2180283551, 2903598061, 3933952357, 436236910, 289419410, 14314871, 1242357089, 2904507907, 1616633776, 2666382180, 585885352, 3471299210, 2699507360, 1432659641, 277164553, 3354103607, 770115018, 2303809295, 3741942315, 3177781868, 2853364978, 2269453327, 3774259834, 987383833, 1290892879, 225909803, 1741533526, 890078084, 1496906255, 1111072499, 916028167, 243534141, 1252605537, 2204162171, 531204876, 290011180, 3916834213, 102027703, 237315147, 209093447, 1486785922, 220223953, 2758195998, 4175039106, 82940208, 3127791296, 2569425252, 518464269, 1353887104, 3941492737, 2377294467, 3935040926 }; public CastCipher(byte[] key, CipherMode mode, CipherPadding padding) : base(key, 8, mode, padding) { int num = key.Length * 8; if (num < 40 || num > 128 || num % 8 != 0) throw new ArgumentException($"""{num}"""); SetKey(key); } public override int EncryptBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset) { uint l = Cipher.BigEndianToUInt32(inputBuffer, inputOffset); uint r = Cipher.BigEndianToUInt32(inputBuffer, inputOffset + 4); uint[] array = new uint[2]; CastEncipher(l, r, array); Cipher.UInt32ToBigEndian(array[0], outputBuffer, outputOffset); Cipher.UInt32ToBigEndian(array[1], outputBuffer, outputOffset + 4); return base.BlockSize; } public override int DecryptBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset) { uint l = Cipher.BigEndianToUInt32(inputBuffer, inputOffset); uint r = Cipher.BigEndianToUInt32(inputBuffer, inputOffset + 4); uint[] array = new uint[2]; CastDecipher(l, r, array); Cipher.UInt32ToBigEndian(array[0], outputBuffer, outputOffset); Cipher.UInt32ToBigEndian(array[1], outputBuffer, outputOffset + 4); return base.BlockSize; } private void SetKey(byte[] key) { if (key.Length < 11) _rounds = RED_ROUNDS; int[] array = new int[16]; int[] array2 = new int[16]; for (int i = 0; i < key.Length; i++) { array2[i] = (key[i] & 255); } uint num = IntsTo32bits(array2, 0); uint num2 = IntsTo32bits(array2, 4); uint num3 = IntsTo32bits(array2, 8); uint num4 = IntsTo32bits(array2, 12); Bits32ToInts(num ^ S5[array2[13]] ^ S6[array2[15]] ^ S7[array2[12]] ^ S8[array2[14]] ^ S7[array2[8]], array, 0); uint inData = num3 ^ S5[array[0]] ^ S6[array[2]] ^ S7[array[1]] ^ S8[array[3]] ^ S8[array2[10]]; Bits32ToInts(inData, array, 4); Bits32ToInts(num4 ^ S5[array[7]] ^ S6[array[6]] ^ S7[array[5]] ^ S8[array[4]] ^ S5[array2[9]], array, 8); uint inData2 = num2 ^ S5[array[10]] ^ S6[array[9]] ^ S7[array[11]] ^ S8[array[8]] ^ S6[array2[11]]; Bits32ToInts(inData2, array, 12); _km[1] = (S5[array[8]] ^ S6[array[9]] ^ S7[array[7]] ^ S8[array[6]] ^ S5[array[2]]); _km[2] = (S5[array[10]] ^ S6[array[11]] ^ S7[array[5]] ^ S8[array[4]] ^ S6[array[6]]); _km[3] = (S5[array[12]] ^ S6[array[13]] ^ S7[array[3]] ^ S8[array[2]] ^ S7[array[9]]); _km[4] = (S5[array[14]] ^ S6[array[15]] ^ S7[array[1]] ^ S8[array[0]] ^ S8[array[12]]); uint num5 = IntsTo32bits(array, 0); inData = IntsTo32bits(array, 4); uint num6 = IntsTo32bits(array, 8); inData2 = IntsTo32bits(array, 12); Bits32ToInts(num6 ^ S5[array[5]] ^ S6[array[7]] ^ S7[array[4]] ^ S8[array[6]] ^ S7[array[0]], array2, 0); num2 = (num5 ^ S5[array2[0]] ^ S6[array2[2]] ^ S7[array2[1]] ^ S8[array2[3]] ^ S8[array[2]]); Bits32ToInts(num2, array2, 4); num3 = (inData ^ S5[array2[7]] ^ S6[array2[6]] ^ S7[array2[5]] ^ S8[array2[4]] ^ S5[array[1]]); Bits32ToInts(num3, array2, 8); num4 = (inData2 ^ S5[array2[10]] ^ S6[array2[9]] ^ S7[array2[11]] ^ S8[array2[8]] ^ S6[array[3]]); Bits32ToInts(num4, array2, 12); _km[5] = (S5[array2[3]] ^ S6[array2[2]] ^ S7[array2[12]] ^ S8[array2[13]] ^ S5[array2[8]]); _km[6] = (S5[array2[1]] ^ S6[array2[0]] ^ S7[array2[14]] ^ S8[array2[15]] ^ S6[array2[13]]); _km[7] = (S5[array2[7]] ^ S6[array2[6]] ^ S7[array2[8]] ^ S8[array2[9]] ^ S7[array2[3]]); _km[8] = (S5[array2[5]] ^ S6[array2[4]] ^ S7[array2[10]] ^ S8[array2[11]] ^ S8[array2[7]]); uint num7 = IntsTo32bits(array2, 0); num2 = IntsTo32bits(array2, 4); num3 = IntsTo32bits(array2, 8); num4 = IntsTo32bits(array2, 12); Bits32ToInts(num7 ^ S5[array2[13]] ^ S6[array2[15]] ^ S7[array2[12]] ^ S8[array2[14]] ^ S7[array2[8]], array, 0); inData = (num3 ^ S5[array[0]] ^ S6[array[2]] ^ S7[array[1]] ^ S8[array[3]] ^ S8[array2[10]]); Bits32ToInts(inData, array, 4); Bits32ToInts(num4 ^ S5[array[7]] ^ S6[array[6]] ^ S7[array[5]] ^ S8[array[4]] ^ S5[array2[9]], array, 8); inData2 = (num2 ^ S5[array[10]] ^ S6[array[9]] ^ S7[array[11]] ^ S8[array[8]] ^ S6[array2[11]]); Bits32ToInts(inData2, array, 12); _km[9] = (S5[array[3]] ^ S6[array[2]] ^ S7[array[12]] ^ S8[array[13]] ^ S5[array[9]]); _km[10] = (S5[array[1]] ^ S6[array[0]] ^ S7[array[14]] ^ S8[array[15]] ^ S6[array[12]]); _km[11] = (S5[array[7]] ^ S6[array[6]] ^ S7[array[8]] ^ S8[array[9]] ^ S7[array[2]]); _km[12] = (S5[array[5]] ^ S6[array[4]] ^ S7[array[10]] ^ S8[array[11]] ^ S8[array[6]]); uint num8 = IntsTo32bits(array, 0); inData = IntsTo32bits(array, 4); uint num9 = IntsTo32bits(array, 8); inData2 = IntsTo32bits(array, 12); Bits32ToInts(num9 ^ S5[array[5]] ^ S6[array[7]] ^ S7[array[4]] ^ S8[array[6]] ^ S7[array[0]], array2, 0); num2 = (num8 ^ S5[array2[0]] ^ S6[array2[2]] ^ S7[array2[1]] ^ S8[array2[3]] ^ S8[array[2]]); Bits32ToInts(num2, array2, 4); num3 = (inData ^ S5[array2[7]] ^ S6[array2[6]] ^ S7[array2[5]] ^ S8[array2[4]] ^ S5[array[1]]); Bits32ToInts(num3, array2, 8); num4 = (inData2 ^ S5[array2[10]] ^ S6[array2[9]] ^ S7[array2[11]] ^ S8[array2[8]] ^ S6[array[3]]); Bits32ToInts(num4, array2, 12); _km[13] = (S5[array2[8]] ^ S6[array2[9]] ^ S7[array2[7]] ^ S8[array2[6]] ^ S5[array2[3]]); _km[14] = (S5[array2[10]] ^ S6[array2[11]] ^ S7[array2[5]] ^ S8[array2[4]] ^ S6[array2[7]]); _km[15] = (S5[array2[12]] ^ S6[array2[13]] ^ S7[array2[3]] ^ S8[array2[2]] ^ S7[array2[8]]); _km[16] = (S5[array2[14]] ^ S6[array2[15]] ^ S7[array2[1]] ^ S8[array2[0]] ^ S8[array2[13]]); uint num10 = IntsTo32bits(array2, 0); num2 = IntsTo32bits(array2, 4); num3 = IntsTo32bits(array2, 8); num4 = IntsTo32bits(array2, 12); Bits32ToInts(num10 ^ S5[array2[13]] ^ S6[array2[15]] ^ S7[array2[12]] ^ S8[array2[14]] ^ S7[array2[8]], array, 0); inData = (num3 ^ S5[array[0]] ^ S6[array[2]] ^ S7[array[1]] ^ S8[array[3]] ^ S8[array2[10]]); Bits32ToInts(inData, array, 4); Bits32ToInts(num4 ^ S5[array[7]] ^ S6[array[6]] ^ S7[array[5]] ^ S8[array[4]] ^ S5[array2[9]], array, 8); inData2 = (num2 ^ S5[array[10]] ^ S6[array[9]] ^ S7[array[11]] ^ S8[array[8]] ^ S6[array2[11]]); Bits32ToInts(inData2, array, 12); _kr[1] = (int)((S5[array[8]] ^ S6[array[9]] ^ S7[array[7]] ^ S8[array[6]] ^ S5[array[2]]) & 31); _kr[2] = (int)((S5[array[10]] ^ S6[array[11]] ^ S7[array[5]] ^ S8[array[4]] ^ S6[array[6]]) & 31); _kr[3] = (int)((S5[array[12]] ^ S6[array[13]] ^ S7[array[3]] ^ S8[array[2]] ^ S7[array[9]]) & 31); _kr[4] = (int)((S5[array[14]] ^ S6[array[15]] ^ S7[array[1]] ^ S8[array[0]] ^ S8[array[12]]) & 31); uint num11 = IntsTo32bits(array, 0); inData = IntsTo32bits(array, 4); uint num12 = IntsTo32bits(array, 8); inData2 = IntsTo32bits(array, 12); Bits32ToInts(num12 ^ S5[array[5]] ^ S6[array[7]] ^ S7[array[4]] ^ S8[array[6]] ^ S7[array[0]], array2, 0); num2 = (num11 ^ S5[array2[0]] ^ S6[array2[2]] ^ S7[array2[1]] ^ S8[array2[3]] ^ S8[array[2]]); Bits32ToInts(num2, array2, 4); num3 = (inData ^ S5[array2[7]] ^ S6[array2[6]] ^ S7[array2[5]] ^ S8[array2[4]] ^ S5[array[1]]); Bits32ToInts(num3, array2, 8); num4 = (inData2 ^ S5[array2[10]] ^ S6[array2[9]] ^ S7[array2[11]] ^ S8[array2[8]] ^ S6[array[3]]); Bits32ToInts(num4, array2, 12); _kr[5] = (int)((S5[array2[3]] ^ S6[array2[2]] ^ S7[array2[12]] ^ S8[array2[13]] ^ S5[array2[8]]) & 31); _kr[6] = (int)((S5[array2[1]] ^ S6[array2[0]] ^ S7[array2[14]] ^ S8[array2[15]] ^ S6[array2[13]]) & 31); _kr[7] = (int)((S5[array2[7]] ^ S6[array2[6]] ^ S7[array2[8]] ^ S8[array2[9]] ^ S7[array2[3]]) & 31); _kr[8] = (int)((S5[array2[5]] ^ S6[array2[4]] ^ S7[array2[10]] ^ S8[array2[11]] ^ S8[array2[7]]) & 31); uint num13 = IntsTo32bits(array2, 0); num2 = IntsTo32bits(array2, 4); num3 = IntsTo32bits(array2, 8); num4 = IntsTo32bits(array2, 12); Bits32ToInts(num13 ^ S5[array2[13]] ^ S6[array2[15]] ^ S7[array2[12]] ^ S8[array2[14]] ^ S7[array2[8]], array, 0); inData = (num3 ^ S5[array[0]] ^ S6[array[2]] ^ S7[array[1]] ^ S8[array[3]] ^ S8[array2[10]]); Bits32ToInts(inData, array, 4); Bits32ToInts(num4 ^ S5[array[7]] ^ S6[array[6]] ^ S7[array[5]] ^ S8[array[4]] ^ S5[array2[9]], array, 8); inData2 = (num2 ^ S5[array[10]] ^ S6[array[9]] ^ S7[array[11]] ^ S8[array[8]] ^ S6[array2[11]]); Bits32ToInts(inData2, array, 12); _kr[9] = (int)((S5[array[3]] ^ S6[array[2]] ^ S7[array[12]] ^ S8[array[13]] ^ S5[array[9]]) & 31); _kr[10] = (int)((S5[array[1]] ^ S6[array[0]] ^ S7[array[14]] ^ S8[array[15]] ^ S6[array[12]]) & 31); _kr[11] = (int)((S5[array[7]] ^ S6[array[6]] ^ S7[array[8]] ^ S8[array[9]] ^ S7[array[2]]) & 31); _kr[12] = (int)((S5[array[5]] ^ S6[array[4]] ^ S7[array[10]] ^ S8[array[11]] ^ S8[array[6]]) & 31); uint num14 = IntsTo32bits(array, 0); inData = IntsTo32bits(array, 4); uint num15 = IntsTo32bits(array, 8); inData2 = IntsTo32bits(array, 12); Bits32ToInts(num15 ^ S5[array[5]] ^ S6[array[7]] ^ S7[array[4]] ^ S8[array[6]] ^ S7[array[0]], array2, 0); num2 = (num14 ^ S5[array2[0]] ^ S6[array2[2]] ^ S7[array2[1]] ^ S8[array2[3]] ^ S8[array[2]]); Bits32ToInts(num2, array2, 4); num3 = (inData ^ S5[array2[7]] ^ S6[array2[6]] ^ S7[array2[5]] ^ S8[array2[4]] ^ S5[array[1]]); Bits32ToInts(num3, array2, 8); num4 = (inData2 ^ S5[array2[10]] ^ S6[array2[9]] ^ S7[array2[11]] ^ S8[array2[8]] ^ S6[array[3]]); Bits32ToInts(num4, array2, 12); _kr[13] = (int)((S5[array2[8]] ^ S6[array2[9]] ^ S7[array2[7]] ^ S8[array2[6]] ^ S5[array2[3]]) & 31); _kr[14] = (int)((S5[array2[10]] ^ S6[array2[11]] ^ S7[array2[5]] ^ S8[array2[4]] ^ S6[array2[7]]) & 31); _kr[15] = (int)((S5[array2[12]] ^ S6[array2[13]] ^ S7[array2[3]] ^ S8[array2[2]] ^ S7[array2[8]]) & 31); _kr[16] = (int)((S5[array2[14]] ^ S6[array2[15]] ^ S7[array2[1]] ^ S8[array2[0]] ^ S8[array2[13]]) & 31); } private static uint F1(uint D, uint Kmi, int Kri) { uint num = Kmi + D; num = ((num << Kri) | (num >> 32 - Kri)); return (S1[(num >> 24) & 255] ^ S2[(num >> 16) & 255]) - S3[(num >> 8) & 255] + S4[num & 255]; } private static uint F2(uint D, uint Kmi, int Kri) { uint num = Kmi ^ D; num = ((num << Kri) | (num >> 32 - Kri)); return (S1[(num >> 24) & 255] - S2[(num >> 16) & 255] + S3[(num >> 8) & 255]) ^ S4[num & 255]; } private static uint F3(uint D, uint Kmi, int Kri) { uint num = Kmi - D; num = ((num << Kri) | (num >> 32 - Kri)); return ((S1[(num >> 24) & 255] + S2[(num >> 16) & 255]) ^ S3[(num >> 8) & 255]) - S4[num & 255]; } private void CastEncipher(uint L0, uint R0, uint[] result) { uint num = L0; uint num2 = R0; for (int i = 1; i <= _rounds; i++) { uint num3 = num; uint num4 = num2; num = num4; switch (i) { case 1: case 4: case 7: case 10: case 13: case 16: num2 = (num3 ^ F1(num4, _km[i], _kr[i])); break; case 2: case 5: case 8: case 11: case 14: num2 = (num3 ^ F2(num4, _km[i], _kr[i])); break; case 3: case 6: case 9: case 12: case 15: num2 = (num3 ^ F3(num4, _km[i], _kr[i])); break; } } result[0] = num2; result[1] = num; } private void CastDecipher(uint L16, uint R16, uint[] result) { uint num = L16; uint num2 = R16; for (int num3 = _rounds; num3 > 0; num3--) { uint num4 = num; uint num5 = num2; num = num5; switch (num3) { case 1: case 4: case 7: case 10: case 13: case 16: num2 = (num4 ^ F1(num5, _km[num3], _kr[num3])); break; case 2: case 5: case 8: case 11: case 14: num2 = (num4 ^ F2(num5, _km[num3], _kr[num3])); break; case 3: case 6: case 9: case 12: case 15: num2 = (num4 ^ F3(num5, _km[num3], _kr[num3])); break; } } result[0] = num2; result[1] = num; } private static void Bits32ToInts(uint inData, int[] b, int offset) { b[offset + 3] = (int)(inData & 255); b[offset + 2] = (int)((inData >> 8) & 255); b[offset + 1] = (int)((inData >> 16) & 255); b[offset] = (int)((inData >> 24) & 255); } private static uint IntsTo32bits(int[] b, int i) { return (uint)(((b[i] & 255) << 24) | ((b[i + 1] & 255) << 16) | ((b[i + 2] & 255) << 8) | (b[i + 3] & 255)); } } }