using Renci.SshNet.Common; using System; namespace Renci.SshNet.Security.Cryptography.Ciphers { public sealed class BlowfishCipher : BlockCipher { private const int Rounds = 16; private const int SboxSk = 256; private const int PSize = 18; private static readonly uint[] KP = new uint[18] { 608135816, 2242054355, 320440878, 57701188, 2752067618, 698298832, 137296536, 3964562569, 1160258022, 953160567, 3193202383, 887688300, 3232508343, 3380367581, 1065670069, 3041331479, 2450970073, 2306472731 }; private static readonly uint[] KS0 = new uint[256] { 3509652390, 2564797868, 805139163, 3491422135, 3101798381, 1780907670, 3128725573, 4046225305, 614570311, 3012652279, 134345442, 2240740374, 1667834072, 1901547113, 2757295779, 4103290238, 227898511, 1921955416, 1904987480, 2182433518, 2069144605, 3260701109, 2620446009, 720527379, 3318853667, 677414384, 3393288472, 3101374703, 2390351024, 1614419982, 1822297739, 2954791486, 3608508353, 3174124327, 2024746970, 1432378464, 3864339955, 2857741204, 1464375394, 1676153920, 1439316330, 715854006, 3033291828, 289532110, 2706671279, 2087905683, 3018724369, 1668267050, 732546397, 1947742710, 3462151702, 2609353502, 2950085171, 1814351708, 2050118529, 680887927, 999245976, 1800124847, 3300911131, 1713906067, 1641548236, 4213287313, 1216130144, 1575780402, 4018429277, 3917837745, 3693486850, 3949271944, 596196993, 3549867205, 258830323, 2213823033, 772490370, 2760122372, 1774776394, 2652871518, 566650946, 4142492826, 1728879713, 2882767088, 1783734482, 3629395816, 2517608232, 2874225571, 1861159788, 326777828, 3124490320, 2130389656, 2716951837, 967770486, 1724537150, 2185432712, 2364442137, 1164943284, 2105845187, 998989502, 3765401048, 2244026483, 1075463327, 1455516326, 1322494562, 910128902, 469688178, 1117454909, 936433444, 3490320968, 3675253459, 1240580251, 122909385, 2157517691, 634681816, 4142456567, 3825094682, 3061402683, 2540495037, 79693498, 3249098678, 1084186820, 1583128258, 426386531, 1761308591, 1047286709, 322548459, 995290223, 1845252383, 2603652396, 3431023940, 2942221577, 3202600964, 3727903485, 1712269319, 422464435, 3234572375, 1170764815, 3523960633, 3117677531, 1434042557, 442511882, 3600875718, 1076654713, 1738483198, 4213154764, 2393238008, 3677496056, 1014306527, 4251020053, 793779912, 2902807211, 842905082, 4246964064, 1395751752, 1040244610, 2656851899, 3396308128, 445077038, 3742853595, 3577915638, 679411651, 2892444358, 2354009459, 1767581616, 3150600392, 3791627101, 3102740896, 284835224, 4246832056, 1258075500, 768725851, 2589189241, 3069724005, 3532540348, 1274779536, 3789419226, 2764799539, 1660621633, 3471099624, 4011903706, 913787905, 3497959166, 737222580, 2514213453, 2928710040, 3937242737, 1804850592, 3499020752, 2949064160, 2386320175, 2390070455, 2415321851, 4061277028, 2290661394, 2416832540, 1336762016, 1754252060, 3520065937, 3014181293, 791618072, 3188594551, 3933548030, 2332172193, 3852520463, 3043980520, 413987798, 3465142937, 3030929376, 4245938359, 2093235073, 3534596313, 375366246, 2157278981, 2479649556, 555357303, 3870105701, 2008414854, 3344188149, 4221384143, 3956125452, 2067696032, 3594591187, 2921233993, 2428461, 544322398, 577241275, 1471733935, 610547355, 4027169054, 1432588573, 1507829418, 2025931657, 3646575487, 545086370, 48609733, 2200306550, 1653985193, 298326376, 1316178497, 3007786442, 2064951626, 458293330, 2589141269, 3591329599, 3164325604, 727753846, 2179363840, 146436021, 1461446943, 4069977195, 705550613, 3059967265, 3887724982, 4281599278, 3313849956, 1404054877, 2845806497, 146425753, 1854211946 }; private static readonly uint[] KS1 = new uint[256] { 1266315497, 3048417604, 3681880366, 3289982499, 2909710000, 1235738493, 2632868024, 2414719590, 3970600049, 1771706367, 1449415276, 3266420449, 422970021, 1963543593, 2690192192, 3826793022, 1062508698, 1531092325, 1804592342, 2583117782, 2714934279, 4024971509, 1294809318, 4028980673, 1289560198, 2221992742, 1669523910, 35572830, 157838143, 1052438473, 1016535060, 1802137761, 1753167236, 1386275462, 3080475397, 2857371447, 1040679964, 2145300060, 2390574316, 1461121720, 2956646967, 4031777805, 4028374788, 33600511, 2920084762, 1018524850, 629373528, 3691585981, 3515945977, 2091462646, 2486323059, 586499841, 988145025, 935516892, 3367335476, 2599673255, 2839830854, 265290510, 3972581182, 2759138881, 3795373465, 1005194799, 847297441, 406762289, 1314163512, 1332590856, 1866599683, 4127851711, 750260880, 613907577, 1450815602, 3165620655, 3734664991, 3650291728, 3012275730, 3704569646, 1427272223, 778793252, 1343938022, 2676280711, 2052605720, 1946737175, 3164576444, 3914038668, 3967478842, 3682934266, 1661551462, 3294938066, 4011595847, 840292616, 3712170807, 616741398, 312560963, 711312465, 1351876610, 322626781, 1910503582, 271666773, 2175563734, 1594956187, 70604529, 3617834859, 1007753275, 1495573769, 4069517037, 2549218298, 2663038764, 504708206, 2263041392, 3941167025, 2249088522, 1514023603, 1998579484, 1312622330, 694541497, 2582060303, 2151582166, 1382467621, 776784248, 2618340202, 3323268794, 2497899128, 2784771155, 503983604, 4076293799, 907881277, 423175695, 432175456, 1378068232, 4145222326, 3954048622, 3938656102, 3820766613, 2793130115, 2977904593, 26017576, 3274890735, 3194772133, 1700274565, 1756076034, 4006520079, 3677328699, 720338349, 1533947780, 354530856, 688349552, 3973924725, 1637815568, 332179504, 3949051286, 53804574, 2852348879, 3044236432, 1282449977, 3583942155, 3416972820, 4006381244, 1617046695, 2628476075, 3002303598, 1686838959, 431878346, 2686675385, 1700445008, 1080580658, 1009431731, 832498133, 3223435511, 2605976345, 2271191193, 2516031870, 1648197032, 4164389018, 2548247927, 300782431, 375919233, 238389289, 3353747414, 2531188641, 2019080857, 1475708069, 455242339, 2609103871, 448939670, 3451063019, 1395535956, 2413381860, 1841049896, 1491858159, 885456874, 4264095073, 4001119347, 1565136089, 3898914787, 1108368660, 540939232, 1173283510, 2745871338, 3681308437, 4207628240, 3343053890, 4016749493, 1699691293, 1103962373, 3625875870, 2256883143, 3830138730, 1031889488, 3479347698, 1535977030, 4236805024, 3251091107, 2132092099, 1774941330, 1199868427, 1452454533, 157007616, 2904115357, 342012276, 595725824, 1480756522, 206960106, 497939518, 591360097, 863170706, 2375253569, 3596610801, 1814182875, 2094937945, 3421402208, 1082520231, 3463918190, 2785509508, 435703966, 3908032597, 1641649973, 2842273706, 3305899714, 1510255612, 2148256476, 2655287854, 3276092548, 4258621189, 236887753, 3681803219, 274041037, 1734335097, 3815195456, 3317970021, 1899903192, 1026095262, 4050517792, 356393447, 2410691914, 3873677099, 3682840055 }; private static readonly uint[] KS2 = new uint[256] { 3913112168, 2491498743, 4132185628, 2489919796, 1091903735, 1979897079, 3170134830, 3567386728, 3557303409, 857797738, 1136121015, 1342202287, 507115054, 2535736646, 337727348, 3213592640, 1301675037, 2528481711, 1895095763, 1721773893, 3216771564, 62756741, 2142006736, 835421444, 2531993523, 1442658625, 3659876326, 2882144922, 676362277, 1392781812, 170690266, 3921047035, 1759253602, 3611846912, 1745797284, 664899054, 1329594018, 3901205900, 3045908486, 2062866102, 2865634940, 3543621612, 3464012697, 1080764994, 553557557, 3656615353, 3996768171, 991055499, 499776247, 1265440854, 648242737, 3940784050, 980351604, 3713745714, 1749149687, 3396870395, 4211799374, 3640570775, 1161844396, 3125318951, 1431517754, 545492359, 4268468663, 3499529547, 1437099964, 2702547544, 3433638243, 2581715763, 2787789398, 1060185593, 1593081372, 2418618748, 4260947970, 69676912, 2159744348, 86519011, 2512459080, 3838209314, 1220612927, 3339683548, 133810670, 1090789135, 1078426020, 1569222167, 845107691, 3583754449, 4072456591, 1091646820, 628848692, 1613405280, 3757631651, 526609435, 236106946, 48312990, 2942717905, 3402727701, 1797494240, 859738849, 992217954, 4005476642, 2243076622, 3870952857, 3732016268, 765654824, 3490871365, 2511836413, 1685915746, 3888969200, 1414112111, 2273134842, 3281911079, 4080962846, 172450625, 2569994100, 980381355, 4109958455, 2819808352, 2716589560, 2568741196, 3681446669, 3329971472, 1835478071, 660984891, 3704678404, 4045999559, 3422617507, 3040415634, 1762651403, 1719377915, 3470491036, 2693910283, 3642056355, 3138596744, 1364962596, 2073328063, 1983633131, 926494387, 3423689081, 2150032023, 4096667949, 1749200295, 3328846651, 309677260, 2016342300, 1779581495, 3079819751, 111262694, 1274766160, 443224088, 298511866, 1025883608, 3806446537, 1145181785, 168956806, 3641502830, 3584813610, 1689216846, 3666258015, 3200248200, 1692713982, 2646376535, 4042768518, 1618508792, 1610833997, 3523052358, 4130873264, 2001055236, 3610705100, 2202168115, 4028541809, 2961195399, 1006657119, 2006996926, 3186142756, 1430667929, 3210227297, 1314452623, 4074634658, 4101304120, 2273951170, 1399257539, 3367210612, 3027628629, 1190975929, 2062231137, 2333990788, 2221543033, 2438960610, 1181637006, 548689776, 2362791313, 3372408396, 3104550113, 3145860560, 296247880, 1970579870, 3078560182, 3769228297, 1714227617, 3291629107, 3898220290, 166772364, 1251581989, 493813264, 448347421, 195405023, 2709975567, 677966185, 3703036547, 1463355134, 2715995803, 1338867538, 1343315457, 2802222074, 2684532164, 233230375, 2599980071, 2000651841, 3277868038, 1638401717, 4028070440, 3237316320, 6314154, 819756386, 300326615, 590932579, 1405279636, 3267499572, 3150704214, 2428286686, 3959192993, 3461946742, 1862657033, 1266418056, 963775037, 2089974820, 2263052895, 1917689273, 448879540, 3550394620, 3981727096, 150775221, 3627908307, 1303187396, 508620638, 2975983352, 2726630617, 1817252668, 1876281319, 1457606340, 908771278, 3720792119, 3617206836, 2455994898, 1729034894, 1080033504 }; private static readonly uint[] KS3 = new uint[256] { 976866871, 3556439503, 2881648439, 1522871579, 1555064734, 1336096578, 3548522304, 2579274686, 3574697629, 3205460757, 3593280638, 3338716283, 3079412587, 564236357, 2993598910, 1781952180, 1464380207, 3163844217, 3332601554, 1699332808, 1393555694, 1183702653, 3581086237, 1288719814, 691649499, 2847557200, 2895455976, 3193889540, 2717570544, 1781354906, 1676643554, 2592534050, 3230253752, 1126444790, 2770207658, 2633158820, 2210423226, 2615765581, 2414155088, 3127139286, 673620729, 2805611233, 1269405062, 4015350505, 3341807571, 4149409754, 1057255273, 2012875353, 2162469141, 2276492801, 2601117357, 993977747, 3918593370, 2654263191, 753973209, 36408145, 2530585658, 25011837, 3520020182, 2088578344, 530523599, 2918365339, 1524020338, 1518925132, 3760827505, 3759777254, 1202760957, 3985898139, 3906192525, 674977740, 4174734889, 2031300136, 2019492241, 3983892565, 4153806404, 3822280332, 352677332, 2297720250, 60907813, 90501309, 3286998549, 1016092578, 2535922412, 2839152426, 457141659, 509813237, 4120667899, 652014361, 1966332200, 2975202805, 55981186, 2327461051, 676427537, 3255491064, 2882294119, 3433927263, 1307055953, 942726286, 933058658, 2468411793, 3933900994, 4215176142, 1361170020, 2001714738, 2830558078, 3274259782, 1222529897, 1679025792, 2729314320, 3714953764, 1770335741, 151462246, 3013232138, 1682292957, 1483529935, 471910574, 1539241949, 458788160, 3436315007, 1807016891, 3718408830, 978976581, 1043663428, 3165965781, 1927990952, 4200891579, 2372276910, 3208408903, 3533431907, 1412390302, 2931980059, 4132332400, 1947078029, 3881505623, 4168226417, 2941484381, 1077988104, 1320477388, 886195818, 18198404, 3786409000, 2509781533, 112762804, 3463356488, 1866414978, 891333506, 18488651, 661792760, 1628790961, 3885187036, 3141171499, 876946877, 2693282273, 1372485963, 791857591, 2686433993, 3759982718, 3167212022, 3472953795, 2716379847, 445679433, 3561995674, 3504004811, 3574258232, 54117162, 3331405415, 2381918588, 3769707343, 4154350007, 1140177722, 4074052095, 668550556, 3214352940, 367459370, 261225585, 2610173221, 4209349473, 3468074219, 3265815641, 314222801, 3066103646, 3808782860, 282218597, 3406013506, 3773591054, 379116347, 1285071038, 846784868, 2669647154, 3771962079, 3550491691, 2305946142, 453669953, 1268987020, 3317592352, 3279303384, 3744833421, 2610507566, 3859509063, 266596637, 3847019092, 517658769, 3462560207, 3443424879, 370717030, 4247526661, 2224018117, 4143653529, 4112773975, 2788324899, 2477274417, 1456262402, 2901442914, 1517677493, 1846949527, 2295493580, 3734397586, 2176403920, 1280348187, 1908823572, 3871786941, 846861322, 1172426758, 3287448474, 3383383037, 1655181056, 3139813346, 901632758, 1897031941, 2986607138, 3066810236, 3447102507, 1393639104, 373351379, 950779232, 625454576, 3124240540, 4148612726, 2007998917, 544563296, 2244738638, 2330496472, 2058025392, 1291430526, 424198748, 50039436, 29584100, 3605783033, 2429876329, 2791104160, 1057563949, 3255363231, 3075367218, 3463963227, 1469046755, 985887462 }; private readonly uint[] _s0; private readonly uint[] _s1; private readonly uint[] _s2; private readonly uint[] _s3; private readonly uint[] _p; public BlowfishCipher(byte[] key, CipherMode mode, CipherPadding padding) : base(key, 8, mode, padding) { int num = key.Length * 8; if ((num < 1 || num > 448) ? true : false) throw new ArgumentException($"""{num}"""); _s0 = new uint[256]; _s1 = new uint[256]; _s2 = new uint[256]; _s3 = new uint[256]; _p = new uint[18]; SetKey(key); } public override int EncryptBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset) { if (inputCount != base.BlockSize) throw new ArgumentException("inputCount"); uint num = Pack.BigEndianToUInt32(inputBuffer, inputOffset); uint num2 = Pack.BigEndianToUInt32(inputBuffer, inputOffset + 4); num ^= _p[0]; for (int i = 1; i < 16; i += 2) { num2 ^= (F(num) ^ _p[i]); num ^= (F(num2) ^ _p[i + 1]); } num2 ^= _p[17]; Pack.UInt32ToBigEndian(num2, outputBuffer, outputOffset); Pack.UInt32ToBigEndian(num, outputBuffer, outputOffset + 4); return base.BlockSize; } public override int DecryptBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset) { if (inputCount != base.BlockSize) throw new ArgumentException("inputCount"); uint num = Pack.BigEndianToUInt32(inputBuffer, inputOffset); uint num2 = Pack.BigEndianToUInt32(inputBuffer, inputOffset + 4); num ^= _p[17]; for (int num3 = 16; num3 > 0; num3 -= 2) { num2 ^= (F(num) ^ _p[num3]); num ^= (F(num2) ^ _p[num3 - 1]); } num2 ^= _p[0]; Pack.UInt32ToBigEndian(num2, outputBuffer, outputOffset); Pack.UInt32ToBigEndian(num, outputBuffer, outputOffset + 4); return base.BlockSize; } private uint F(uint x) { return ((_s0[x >> 24] + _s1[(x >> 16) & 255]) ^ _s2[(x >> 8) & 255]) + _s3[x & 255]; } private void SetKey(byte[] key) { Buffer.BlockCopy(KS0, 0, _s0, 0, 1024); Buffer.BlockCopy(KS1, 0, _s1, 0, 1024); Buffer.BlockCopy(KS2, 0, _s2, 0, 1024); Buffer.BlockCopy(KS3, 0, _s3, 0, 1024); Buffer.BlockCopy(KP, 0, _p, 0, 72); int num = key.Length; int num2 = 0; for (int i = 0; i < 18; i++) { uint num3 = 0; for (int j = 0; j < 4; j++) { num3 = ((num3 << 8) | key[num2++]); if (num2 >= num) num2 = 0; } _p[i] ^= num3; } ProcessTable(0, 0, _p); ProcessTable(_p[16], _p[17], _s0); ProcessTable(_s0[254], _s0[255], _s1); ProcessTable(_s1[254], _s1[255], _s2); ProcessTable(_s2[254], _s2[255], _s3); } private void ProcessTable(uint xl, uint xr, uint[] table) { int num = table.Length; for (int i = 0; i < num; i += 2) { xl ^= _p[0]; for (int j = 1; j < 16; j += 2) { xr ^= (F(xl) ^ _p[j]); xl ^= (F(xr) ^ _p[j + 1]); } xr ^= _p[17]; table[i] = xr; table[i + 1] = xl; xr = xl; xl = table[i]; } } } }