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//************************************************************************
// Microsoft Corporation
// Copyright(c) Microsoft Corp., 1990-1992
//
//
// Revision history:
// 5/5/94 Created gurdeep
//
//************************************************************************
//#define COMP_12K
#include "wan.h"
#define __FILE_SIG__ COMPRESS_FILESIG
//#define DEBUG
CONSTunsigned long lookup_array1[256] = { 0, 10276755, 20553510, 30830265, 41107020, 51383775, 61660530, 71937285, 82214040, 92490795, 102767550, 113044305, 123321060, 133597815, 143874570, 154151325, 164428080, 174704835, 184981590, 195258345, 205535100, 215811855, 226088610, 236365365, 246642120, 256918875, 267195630, 277472385, 287749140, 298025895, 308302650, 318579405, 328856160, 339132915, 349409670, 359686425, 369963180, 380239935, 390516690, 400793445, 411070200, 421346955, 431623710, 441900465, 452177220, 462453975, 472730730, 483007485, 493284240, 503560995, 513837750, 524114505, 534391260, 544668015, 554944770, 565221525, 575498280, 585775035, 596051790, 606328545, 616605300, 626882055, 637158810, 647435565, 657712320, 667989075, 678265830, 688542585, 698819340, 709096095, 719372850, 729649605, 739926360, 750203115, 760479870, 770756625, 781033380, 791310135, 801586890, 811863645, 822140400, 832417155, 842693910, 852970665, 863247420, 873524175, 883800930, 894077685, 904354440, 914631195, 924907950, 935184705, 945461460, 955738215, 966014970, 976291725, 986568480, 996845235, 1007121990, 1017398745, 1027675500, 1037952255, 1048229010, 1058505765, 1068782520, 1079059275, 1089336030, 1099612785, 1109889540, 1120166295, 1130443050, 1140719805, 1150996560, 1161273315, 1171550070, 1181826825, 1192103580, 1202380335, 1212657090, 1222933845, 1233210600, 1243487355, 1253764110, 1264040865, 1274317620, 1284594375, 1294871130, 1305147885, 1315424640, 1325701395, 1335978150, 1346254905, 1356531660, 1366808415, 1377085170, 1387361925, 1397638680, 1407915435, 1418192190, 1428468945, 1438745700, 1449022455, 1459299210, 1469575965, 1479852720, 1490129475, 1500406230, 1510682985, 1520959740, 1531236495, 1541513250, 1551790005, 1562066760, 1572343515, 1582620270, 1592897025, 1603173780, 1613450535, 1623727290, 1634004045, 1644280800, 1654557555, 1664834310, 1675111065, 1685387820, 1695664575, 1705941330, 1716218085, 1726494840, 1736771595, 1747048350, 1757325105, 1767601860, 1777878615, 1788155370, 1798432125, 1808708880, 1818985635, 1829262390, 1839539145, 1849815900, 1860092655, 1870369410, 1880646165, 1890922920, 1901199675, 1911476430, 1921753185, 1932029940, 1942306695, 1952583450, 1962860205, 1973136960, 1983413715, 1993690470, 2003967225, 2014243980, 2024520735, 2034797490, 2045074245, 2055351000, 2065627755, 2075904510, 2086181265, 2096458020, 2106734775, 2117011530, 2127288285, 2137565040, 2147841795, 2158118550, 2168395305, 2178672060, 2188948815, 2199225570, 2209502325, 2219779080, 2230055835, 2240332590, 2250609345, 2260886100, 2271162855, 2281439610, 2291716365, 2301993120, 2312269875, 2322546630, 2332823385, 2343100140, 2353376895, 2363653650, 2373930405, 2384207160, 2394483915, 2404760670, 2415037425, 2425314180, 2435590935, 2445867690, 2456144445, 2466421200, 2476697955, 2486974710, 2497251465, 2507528220, 2517804975, 2528081730, 2538358485, 2548635240, 2558911995, 2569188750, 2579465505, 2589742260, 2600019015, 2610295770, 2620572525};
/*
for i = 0 to 255, lookup_array2[i] = lookup_array1[i] << 8;*/CONSTunsigned long lookup_array2[256] = { 0, 2630849280, 966731264, 3597580544, 1933462528, 269344512, 2900193792, 1236075776, 3866925056, 2202807040, 538689024, 3169538304, 1505420288, 4136269568, 2472151552, 808033536, 3438882816, 1774764800, 110646784, 2741496064, 1077378048, 3708227328, 2044109312, 379991296, 3010840576, 1346722560, 3977571840, 2313453824, 649335808, 3280185088, 1616067072, 4246916352, 2582798336, 918680320, 3549529600, 1885411584, 221293568, 2852142848, 1188024832, 3818874112, 2154756096, 490638080, 3121487360, 1457369344, 4088218624, 2424100608, 759982592, 3390831872, 1726713856, 62595840, 2693445120, 1029327104, 3660176384, 1996058368, 331940352, 2962789632, 1298671616, 3929520896, 2265402880, 601284864, 3232134144, 1568016128, 4198865408, 2534747392, 870629376, 3501478656, 1837360640, 173242624, 2804091904, 1139973888, 3770823168, 2106705152, 442587136, 3073436416, 1409318400, 4040167680, 2376049664, 711931648, 3342780928, 1678662912, 14544896, 2645394176, 981276160, 3612125440, 1948007424, 283889408, 2914738688, 1250620672, 3881469952, 2217351936, 553233920, 3184083200, 1519965184, 4150814464, 2486696448, 822578432, 3453427712, 1789309696, 125191680, 2756040960, 1091922944, 3722772224, 2058654208, 394536192, 3025385472, 1361267456, 3992116736, 2327998720, 663880704, 3294729984, 1630611968, 4261461248, 2597343232, 933225216, 3564074496, 1899956480, 235838464, 2866687744, 1202569728, 3833419008, 2169300992, 505182976, 3136032256, 1471914240, 4102763520, 2438645504, 774527488, 3405376768, 1741258752, 77140736, 2707990016, 1043872000, 3674721280, 2010603264, 346485248, 2977334528, 1313216512, 3944065792, 2279947776, 615829760, 3246679040, 1582561024, 4213410304, 2549292288, 885174272, 3516023552, 1851905536, 187787520, 2818636800, 1154518784, 3785368064, 2121250048, 457132032, 3087981312, 1423863296, 4054712576, 2390594560, 726476544, 3357325824, 1693207808, 29089792, 2659939072, 995821056, 3626670336, 1962552320, 298434304, 2929283584, 1265165568, 3896014848, 2231896832, 567778816, 3198628096, 1534510080, 4165359360, 2501241344, 837123328, 3467972608, 1803854592, 139736576, 2770585856, 1106467840, 3737317120, 2073199104, 409081088, 3039930368, 1375812352, 4006661632, 2342543616, 678425600, 3309274880, 1645156864, 4276006144, 2611888128, 947770112, 3578619392, 1914501376, 250383360, 2881232640, 1217114624, 3847963904, 2183845888, 519727872, 3150577152, 1486459136, 4117308416, 2453190400, 789072384, 3419921664, 1755803648, 91685632, 2722534912, 1058416896, 3689266176, 2025148160, 361030144, 2991879424, 1327761408, 3958610688, 2294492672, 630374656, 3261223936, 1597105920, 4227955200, 2563837184, 899719168, 3530568448, 1866450432, 202332416, 2833181696, 1169063680, 3799912960, 2135794944, 471676928, 3102526208, 1438408192, 4069257472, 2405139456, 741021440, 3371870720, 1707752704, 43634688, 2674483968, 1010365952, 3641215232, 1977097216, 312979200, 2943828480, 1279710464, 3910559744, 2246441728, 582323712, 3213172992, 1549054976, 4179904256, 2515786240, 851668224};
/*
for i = 0 to 255, lookup_array3[i] = lookup_array1[i] << 16;*/CONSTunsigned long lookup_array3[256] = { 0, 3482517504, 2670067712, 1857617920, 1045168128, 232718336, 3715235840, 2902786048, 2090336256, 1277886464, 465436672, 3947954176, 3135504384, 2323054592, 1510604800, 698155008, 4180672512, 3368222720, 2555772928, 1743323136, 930873344, 118423552, 3600941056, 2788491264, 1976041472, 1163591680, 351141888, 3833659392, 3021209600, 2208759808, 1396310016, 583860224, 4066377728, 3253927936, 2441478144, 1629028352, 816578560, 4128768, 3486646272, 2674196480, 1861746688, 1049296896, 236847104, 3719364608, 2906914816, 2094465024, 1282015232, 469565440, 3952082944, 3139633152, 2327183360, 1514733568, 702283776, 4184801280, 3372351488, 2559901696, 1747451904, 935002112, 122552320, 3605069824, 2792620032, 1980170240, 1167720448, 355270656, 3837788160, 3025338368, 2212888576, 1400438784, 587988992, 4070506496, 3258056704, 2445606912, 1633157120, 820707328, 8257536, 3490775040, 2678325248, 1865875456, 1053425664, 240975872, 3723493376, 2911043584, 2098593792, 1286144000, 473694208, 3956211712, 3143761920, 2331312128, 1518862336, 706412544, 4188930048, 3376480256, 2564030464, 1751580672, 939130880, 126681088, 3609198592, 2796748800, 1984299008, 1171849216, 359399424, 3841916928, 3029467136, 2217017344, 1404567552, 592117760, 4074635264, 3262185472, 2449735680, 1637285888, 824836096, 12386304, 3494903808, 2682454016, 1870004224, 1057554432, 245104640, 3727622144, 2915172352, 2102722560, 1290272768, 477822976, 3960340480, 3147890688, 2335440896, 1522991104, 710541312, 4193058816, 3380609024, 2568159232, 1755709440, 943259648, 130809856, 3613327360, 2800877568, 1988427776, 1175977984, 363528192, 3846045696, 3033595904, 2221146112, 1408696320, 596246528, 4078764032, 3266314240, 2453864448, 1641414656, 828964864, 16515072, 3499032576, 2686582784, 1874132992, 1061683200, 249233408, 3731750912, 2919301120, 2106851328, 1294401536, 481951744, 3964469248, 3152019456, 2339569664, 1527119872, 714670080, 4197187584, 3384737792, 2572288000, 1759838208, 947388416, 134938624, 3617456128, 2805006336, 1992556544, 1180106752, 367656960, 3850174464, 3037724672, 2225274880, 1412825088, 600375296, 4082892800, 3270443008, 2457993216, 1645543424, 833093632, 20643840, 3503161344, 2690711552, 1878261760, 1065811968, 253362176, 3735879680, 2923429888, 2110980096, 1298530304, 486080512, 3968598016, 3156148224, 2343698432, 1531248640, 718798848, 4201316352, 3388866560, 2576416768, 1763966976, 951517184, 139067392, 3621584896, 2809135104, 1996685312, 1184235520, 371785728, 3854303232, 3041853440, 2229403648, 1416953856, 604504064, 4087021568, 3274571776, 2462121984, 1649672192, 837222400, 24772608, 3507290112, 2694840320, 1882390528, 1069940736, 257490944, 3740008448, 2927558656, 2115108864, 1302659072, 490209280, 3972726784, 3160276992, 2347827200, 1535377408, 722927616, 4205445120, 3392995328, 2580545536, 1768095744, 955645952, 143196160, 3625713664, 2813263872, 2000814080, 1188364288, 375914496, 3858432000, 3045982208, 2233532416, 1421082624, 608632832, 4091150336, 3278700544};
/*
The key for the multiplicative hash function consists of 3 unsigned characters. They are composed (logically) by concatenating them i.e. the composed key = 2^16*c2 + 2^8*c2 + c3 and fits in 24 bits. The composed key is not actually computed here as we use the components to directly compute the hash function.
The multiplicative hash function consists of taking the higher order 12 bits (2^12 = 4096) of the lower order 24 bits of the product key * Multiplier where Multiplier = floor(A * pow(2.0, (double) w)); double A = 0.6125423371; (chosen according to Knuth) w = 24 (the key's width in bits) The algorithm for this is in Cormen/Leiserson/Rivest.
To do the multplication efficiently, the product c*Multiplier is precomputed and stored in lookup_array1 (for all 256 possible c's). lookup_array2 and lookup_array3 contain the same data as lookup_array1 but shifted left 8 and 16 bits respectively.
MultHash1 is the mult hashing function. MultHash0 contains an older (slower but less space-efficient) version of the same function.*/
#define MULTHASH1(c1,c2,c3) \
((lookup_array1[c1]+ \ lookup_array2[c2]+ \ lookup_array3[c3] ) & 0x00fff000) >> 12
/*
USHORT xorlookup1 [256] = { 0x110, 0x120, 0x130, 0x140, 0x150, 0x160, 0x170, 0x180, // 0-7
0x190, 0x1a0, 0x1b0, 0x1c0, 0x1d0, 0x1e0, 0x1f0, 0x100, // 8-15
0x210, 0x220, 0x230, 0x240, 0x250, 0x260, 0x270, 0x280, // 16-23
0x290, 0x2a0, 0x2b0, 0x2c0, 0x2d0, 0x2e0, 0x2f0, 0x200, // 24-31
0x310, 0x320, 0x330, 0x340, 0x350, 0x360, 0x370, 0x380, // 32-39
0x390, 0x3a0, 0x3b0, 0x3c0, 0x3d0, 0x3e0, 0x3f0, 0x300, // 40-47
0x410, 0x420, 0x430, 0x440, 0x450, 0x460, 0x470, 0x480, // 48-55
0x490, 0x4a0, 0x4b0, 0x4c0, 0x4d0, 0x4e0, 0x4f0, 0x400, // 56-63
0x510, 0x520, 0x530, 0x540, 0x550, 0x560, 0x570, 0x580, // 64-71
0x590, 0x5a0, 0x5b0, 0x5c0, 0x5d0, 0x5e0, 0x5f0, 0x500, // 72-79
0x610, 0x620, 0x630, 0x640, 0x650, 0x660, 0x670, 0x680, // 80-87
0x690, 0x6a0, 0x6b0, 0x6c0, 0x6d0, 0x6e0, 0x6f0, 0x600, // 88-95
0x710, 0x720, 0x730, 0x740, 0x750, 0x760, 0x770, 0x780, // 96-103
0x790, 0x7a0, 0x7b0, 0x7c0, 0x7d0, 0x7e0, 0x7f0, 0x700, // 104-111
0x810, 0x820, 0x830, 0x840, 0x850, 0x860, 0x870, 0x880, // 112-119
0x890, 0x8a0, 0x8b0, 0x8c0, 0x8d0, 0x8e0, 0x8f0, 0x800, // 120-127
0x910, 0x920, 0x930, 0x940, 0x950, 0x960, 0x970, 0x980, // 128-135
0x990, 0x9a0, 0x9b0, 0x9c0, 0x9d0, 0x9e0, 0x9f0, 0x900, // 136-143
0xa10, 0xa20, 0xa30, 0xa40, 0xa50, 0xa60, 0xa70, 0xa80, // 144-151
0xa90, 0xaa0, 0xab0, 0xac0, 0xad0, 0xae0, 0xaf0, 0xa00, // 152-159
0xb10, 0xb20, 0xb30, 0xb40, 0xb50, 0xb60, 0xb70, 0xb80, // 160-167
0xb90, 0xba0, 0xbb0, 0xbc0, 0xbd0, 0xbe0, 0xbf0, 0xb00, // 168-175
0xc10, 0xc20, 0xc30, 0xc40, 0xc50, 0xc60, 0xc70, 0xc80, // 176-183
0xc90, 0xca0, 0xcb0, 0xcc0, 0xcd0, 0xce0, 0xcf0, 0xc00, // 184-191
0xd10, 0xd20, 0xd30, 0xd40, 0xd50, 0xd60, 0xd70, 0xd80, // 192-199
0xd90, 0xda0, 0xdb0, 0xdc0, 0xdd0, 0xde0, 0xdf0, 0xd00, // 200-207
0xe10, 0xe20, 0xe30, 0xe40, 0xe50, 0xe60, 0xe70, 0xe80, // 208-215
0xe90, 0xea0, 0xeb0, 0xec0, 0xed0, 0xee0, 0xef0, 0xe00, // 216-223
0xf10, 0xf20, 0xf30, 0xf40, 0xf50, 0xf60, 0xf70, 0xf80, // 224-231
0xf90, 0xfa0, 0xfb0, 0xfc0, 0xfd0, 0xfe0, 0xff0, 0xf00, // 232-239
0x010, 0x020, 0x030, 0x040, 0x050, 0x060, 0x070, 0x080, // 240-247
0x090, 0x0a0, 0x0b0, 0x0c0, 0x0d0, 0x0e0, 0x0f0, 0x000 }; // 248-255
USHORT xorlookup2 [256] = { 0x101, 0x201, 0x301, 0x401, 0x501, 0x601, 0x701, 0x801, // 0-7
0x901, 0xa01, 0xb01, 0xc01, 0xd01, 0xe01, 0xf01, 0x001, // 8-15
0x102, 0x202, 0x302, 0x402, 0x502, 0x602, 0x702, 0x802, // 16-23
0x902, 0xa02, 0xb02, 0xc02, 0xd02, 0xe02, 0xf02, 0x002, // 24-31
0x103, 0x203, 0x303, 0x403, 0x503, 0x603, 0x703, 0x803, // 32-39
0x903, 0xa03, 0xb03, 0xc03, 0xd03, 0xe03, 0xf03, 0x003, // 40-47
0x104, 0x204, 0x304, 0x404, 0x504, 0x604, 0x704, 0x804, // 48-55
0x904, 0xa04, 0xb04, 0xc04, 0xd04, 0xe04, 0xf04, 0x004, // 56-63
0x105, 0x205, 0x305, 0x405, 0x505, 0x605, 0x705, 0x805, // 64-71
0x905, 0xa05, 0xb05, 0xc05, 0xd05, 0xe05, 0xf05, 0x005, // 72-79
0x106, 0x206, 0x306, 0x406, 0x506, 0x606, 0x706, 0x806, // 80-87
0x906, 0xa06, 0xb06, 0xc06, 0xd06, 0xe06, 0xf06, 0x006, // 88-95
0x107, 0x207, 0x307, 0x407, 0x507, 0x607, 0x707, 0x807, // 96-103
0x907, 0xa07, 0xb07, 0xc07, 0xd07, 0xe07, 0xf07, 0x007, // 104-111
0x108, 0x208, 0x308, 0x408, 0x508, 0x608, 0x708, 0x808, // 112-119
0x908, 0xa08, 0xb08, 0xc08, 0xd08, 0xe08, 0xf08, 0x008, // 120-127
0x109, 0x209, 0x309, 0x409, 0x509, 0x609, 0x709, 0x809, // 128-135
0x909, 0xa09, 0xb09, 0xc09, 0xd09, 0xe09, 0xf09, 0x009, // 136-143
0x10a, 0x20a, 0x30a, 0x40a, 0x50a, 0x60a, 0x70a, 0x80a, // 144-151
0x90a, 0xa0a, 0xb0a, 0xc0a, 0xd0a, 0xe0a, 0xf0a, 0x00a, // 152-159
0x10b, 0x20b, 0x30b, 0x40b, 0x50b, 0x60b, 0x70b, 0x80b, // 160-167
0x90b, 0xa0b, 0xb0b, 0xc0b, 0xd0b, 0xe0b, 0xf0b, 0x00b, // 168-175
0x10c, 0x20c, 0x30c, 0x40c, 0x50c, 0x60c, 0x70c, 0x80c, // 176-183
0x90c, 0xa0c, 0xb0c, 0xc0c, 0xd0c, 0xe0c, 0xf0c, 0x00c, // 184-191
0x10d, 0x20d, 0x30d, 0x40d, 0x50d, 0x60d, 0x70d, 0x80d, // 192-199
0x90d, 0xa0d, 0xb0d, 0xc0d, 0xd0d, 0xe0d, 0xf0d, 0x00d, // 200-207
0x10e, 0x20e, 0x30e, 0x40e, 0x50e, 0x60e, 0x70e, 0x80e, // 208-215
0x90e, 0xa0e, 0xb0e, 0xc0e, 0xd0e, 0xe0e, 0xf0e, 0x00e, // 216-223
0x10f, 0x20f, 0x30f, 0x40f, 0x50f, 0x60f, 0x70f, 0x80f, // 224-231
0x90f, 0xa0f, 0xb0f, 0xc0f, 0xd0f, 0xe0f, 0xf0f, 0x00f, // 232-239
0x000, 0x200, 0x300, 0x400, 0x500, 0x600, 0x700, 0x800, // 240-247
0x900, 0xa00, 0xb00, 0xc00, 0xd00, 0xe00, 0xf00, 0x100 }; // 248-255
*/
/* Bitptrs point to the current byte. The current bit (i.e. next bit to be
* stored) is masked off by the bit entry. When this reaches zero, it is * reset to 0x80 and the next byte is set up. The bytes are filled MSBit * first. */
/* Starts and sets the first byte to zero for the bitptr. */#define bitptr_init(s) pbyte = s; byte=0; bit = 16;
/* Sets up the byte part of the bitptr so that it is pointing to the byte after
* the byte which had the last bit put into it. */#define bitptr_end() if (bit != 16) *pbyte++=(UCHAR)(byte >> 8);
/* Goes to the next bit, and byte if necessary. */#define bitptr_next() \
if (bit < 10) { \ *pbyte++=(UCHAR)(byte >> 8); \ byte <<= 8; \ bit = 16; \ } else \ bit-- ;
/*
#define bitptr_next() \
bit--; \ if (bit < 9) { \ *pbyte++=(UCHAR)(byte >> 8); \ byte <<= 8; \ bit = 16; \ }*/
/* Advances to the next bit, and byte if necessary, readjusting the bit. */#define bitptr_advance() \
if (bit < 9) { \ *pbyte++=(UCHAR)(byte >> 8); \ bit+=8; \ byte <<= 8; \ }
/* BIT I/O FUNCTIONS *********************************************************/
/* These routines output most-significant-bit-first and the input will return
* them MSB first, too. */
/* Outputs a one bit in the bit stream. */#define out_bit_1() bit--; byte |= (1 << bit); bitptr_advance();
#define out_bit_0() bitptr_next();
/* TestBit; output 1 if that bit is set *///#define tb(b,w,n) if ((w) & (n)) *pbyte |= bit; bitptr_next(b);
#define out_bits_2(w) bit-=2; byte|=(w << bit); bitptr_advance();
#define out_bits_3(w) bit-=3; byte|=(w << bit); bitptr_advance();
#define out_bits_4(w) bit-=4; byte|=(w << bit); bitptr_advance();
#define out_bits_5(w) bit-=5; byte|=(w << bit); bitptr_advance();
#define out_bits_6(w) bit-=6; byte|=(w << bit); bitptr_advance();
#define out_bits_7(w) bit-=7; byte|=(w << bit); bitptr_advance();
// #define out_bits_8(w) bit-=8; byte|=(w << bit); bit+=8; *pbyte++=(UCHAR)(byte >> 8); byte <<= 8;
#define out_bits_8(w) byte|=(w << (bit-8)); *pbyte++=(UCHAR)(byte >> 8); byte <<= 8;
/*
#define out_bits_9(w) \
if (bit > 9) { \ bit-=9; byte|=(w << bit); \ *pbyte++=(UCHAR)(byte >> 8);\ bit+=8; \ byte <<= 8; \ } else { \ bit=16; byte |= w; \ *pbyte++=(UCHAR)(byte >> 8); *pbyte++=(UCHAR)(byte); byte=0; \ }*/
#define out_bits_9(w) \
if (bit > 9) { \ byte|=(w << (bit-9)); \ *pbyte++=(UCHAR)(byte >> 8);\ bit--; \ byte <<= 8; \ } else { \ bit=16; byte |= w; \ *pbyte++=(UCHAR)(byte >> 8); *pbyte++=(UCHAR)(byte); byte=0; \ }
#define out_bits_10(w) \
if (bit > 10) { \ bit-=10; byte |= (w << bit); *pbyte++ = (UCHAR)(byte >> 8); bit+=8; byte <<=8; \ } else { \ out_bits_2((w >> 8)); \ out_bits_8((w & 0xFF)); \ }
//
// Weird effect - if out_bits_9 used instead of out_bits_8,
// it's faster! if (bit == 11) is faster than if (bit != 11).
//
#define out_bits_11(w) \
if (bit > 11) { \ bit-=11; byte |= (w << bit); *pbyte++ = (UCHAR)(byte >> 8); bit+=8; byte <<=8; \ } else { \ if (bit == 11) { \ bit=16; byte |= w; \ *pbyte++=(UCHAR)(byte >> 8); *pbyte++=(UCHAR)(byte); byte=0; \ } else { \ bit=11-bit; \ byte|=(w >> bit); \ *pbyte++=(UCHAR)(byte >> 8); *pbyte++=(UCHAR)(byte); \ bit=16-bit; \ byte=(w << bit); \ } \ }
#define out_bits_12(w) \
if (bit > 12) { \ bit-=12; byte |= (w << bit); *pbyte++ = (UCHAR)(byte >> 8); bit+=8; byte <<=8; \ } else { \ out_bits_4((w >> 8)); \ out_bits_8((w & 0xFF)); \ } #define out_bits_13(w) \
if (bit > 13) { \ bit-=13; byte |= (w << bit); *pbyte++ = (UCHAR)(byte >> 8); bit+=8; byte <<=8; \ } else { \ out_bits_5((w >> 8)); \ out_bits_8((w & 0xFF)); \ }
#define out_bits_14(w) \
if (bit > 14) { \ bit-=14; byte |= (w << bit); *pbyte++ = (UCHAR)(byte >> 8); bit+=8; byte <<=8; \ } else { \ out_bits_6((w >> 8)); \ out_bits_8((w & 0xFF)); \ }
#define out_reserve_4() \
bit-=4; bitptr_advance();
/* Starts the given bit pointer */#define inbit_start(s) pbyte = s; bit = 16; byte=(*pbyte << 8) + *(pbyte+1); pbyte++;
#define inbit_end() if (bit != 16) pbyte++;
#define in_bit_next() if (bit < 9) { \
bit=16; \ byte <<=8; \ byte |= *(++pbyte); \ }
#define in_bit_advance() if (bit < 9) { \
bit+=8; \ byte <<=8; \ byte |= *(++pbyte); \ }
/* Returns non-zero in bitset if the next bit in the stream is a 1. */#define in_bit() bit--; bitset = (byte >> bit) & 1; in_bit_next()
#define in_bits_2(w) bit-=2; w = (byte >> bit) & 0x03;\
in_bit_advance();
#define in_bits_3(w) bit-=3; w = (byte >> bit) & 0x07;\
in_bit_advance();
#define in_bits_4(w) bit-=4; w = (byte >> bit) & 0x0F;\
in_bit_advance();
#define in_bits_5(w) bit-=5; w = (byte >> bit) & 0x1F;\
in_bit_advance();
#define in_bits_6(w) bit-=6; w = (byte >> bit) & 0x3F;\
in_bit_advance();
#define in_bits_7(w) bit-=7; w = (byte >> bit) & 0x7F;\
in_bit_advance();
#define in_bits_8(w) bit-=8; w = (byte >> bit) & 0xFF;\
bit+=8; byte <<=8; byte |= *(++pbyte);
#define in_bits_9(w) bit-=9; w = (byte >> bit) & 0x1FF; \
bit+=8; byte <<=8; byte |= *(++pbyte); \ in_bit_advance();
#define in_bits_10(w) if (bit > 10) { \
bit-=10; w = (byte >> bit) & 0x3FF; \ bit+=8; byte <<=8; byte |= *(++pbyte); \ } else { \ in_bits_2(bitset); \ in_bits_8(w); \ w= w + (bitset << 8); \ }
#define in_bits_11(w) if (bit > 11) { \
bit-=11; w = (byte >> bit) & 0x7FF; \ bit+=8; byte <<=8; byte |= *(++pbyte); \ } else { \ in_bits_3(bitset); \ in_bits_8(w); \ w= w + (bitset << 8); \ }
#define in_bits_12(w) if (bit > 12) { \
bit-=12; w = (byte >> bit) & 0xFFF; \ bit+=8; byte <<=8; byte |= *(++pbyte); \ } else { \ in_bits_4(bitset); \ in_bits_8(w); \ w= w + (bitset << 8); \ }
#define in_bits_13(w)\
if (bit > 13) { \ bit-=13; w = (byte >> bit) & 0x1FFF; \ bit+=8; byte <<=8; byte |= *(++pbyte); \ } else { \ in_bits_5(bitset); \ in_bits_8(w); \ w=w + (bitset << 8); \ }
#define in_bits_14(w)\
if (bit > 14) { \ bit-=14; w = (byte >> bit) & 0x3FFF; \ bit+=8; byte <<=8; byte |= *(++pbyte); \ } else { \ in_bits_6(bitset); \ in_bits_8(w); \ w=w + (bitset << 8); \ }
UCHAR SHApad1[40] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};UCHAR SHApad2[40] = {0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2};
PUCHAR ClntSSrvR = "On the client side, this is the send key; on the server side, it is the receive key.";PUCHAR ClntRSrvS = "On the client side, this is the receive key; on the server side, it is the send key.";#define ECP_STRING_LEN strlen(ClntSSrvR)
#ifdef DEBUG
charChPrint(UCHAR b){ if (isprint(b)) return (char)b; else return '.';}#endif
//* compress()
//
// Function: Main compression function.
//
// Parameters:
// IN CurrentBuffer -> points to NDIS_WAN_PACKET with data to compress
// OUT CompOutBuffer -> points to NDIS_WAN_PACKET to compress data to
// IN CurrentLength -> points to Length of data to compress
// IN context -> connection compress context
//
// Returns: Nothing
//
// WARNING: CODE IS HIGHLY OPTIMIZED FOR TIME.
//
//
UCHARcompress (UCHAR *CurrentBuffer, UCHAR *CompOutBuffer, ULONG *CurrentLength, SendContext *context){ int copylen ; int bit; int byte; int backptr ; int cbMatch; int hashvalue ; int lookup1 ; UCHAR *matchptr ; UCHAR *pbyte; UCHAR *historyptr ; UCHAR *currentptr ; UCHAR *endptr ; UCHAR hashchar1; UCHAR hashchar2; UCHAR hashchar3; int literal ; UCHAR status=0; // return flags
PUCHAR currentbuf ;
// Will this packet fit at the end of the history buffer?
//
if (((context->CurrentIndex + *CurrentLength) >= (HISTORY_MAX - 1 )) || (context->CurrentIndex == 0)) { context->CurrentIndex = 0; // Index into the history
status |= PACKET_AT_FRONT; }
//
// we no longer need to save the non compressed data - tonybe 01-12-95
//
// RtlMoveMemory(context->CompressBuffer, CurrentBuffer, *CurrentLength) ;
// Start out the bit pointing output
//
bitptr_init(CompOutBuffer);
//
// We are now compressing into an output buffer - tonybe 01-12-95
//
// bitptr_init(CurrentBuffer);
historyptr = context->History + context->CurrentIndex ;
currentptr = CurrentBuffer;
//
// we are now compressing from the currentbuffer - tonybe 01-12-95
//
// currentptr = context->CompressBuffer ;
endptr = currentptr + *CurrentLength - 1;
while (currentptr < (endptr-2)) {
*historyptr++ = hashchar1 = *currentptr++ ; hashchar2 = *currentptr ; hashchar3 = *(currentptr+1) ;
// "fast" hash function
// hashvalue = (int)hashchar1 ^ xorlookup1[hashchar2] ^ xorlookup2[hashchar3];
hashvalue = MULTHASH1(hashchar1, hashchar2, hashchar3) ;
matchptr = context->History + context->HashTable[hashvalue] ;
if (matchptr != (historyptr - 1)) context->HashTable[hashvalue] = (USHORT)(historyptr - context->History) ;
if (context->ValidHistory < historyptr) context->ValidHistory = historyptr ;
if (matchptr != context->History && *(matchptr-1) == hashchar1 && *matchptr == hashchar2 && *(matchptr+1) == hashchar3 && matchptr != (historyptr - 1) && matchptr != historyptr && (matchptr+1) <= context->ValidHistory) {
backptr = ((int)(historyptr - matchptr)) & (HISTORY_SIZE - 1) ;
*historyptr++ = hashchar2 ; // copy the other 2 chars
*historyptr++ = hashchar3 ; // copy the other 2 chars
currentptr +=2 ; cbMatch = 3 ; // length of match
matchptr +=2 ; // we have already matched 3
while ((*matchptr == *currentptr) && (currentptr < endptr) && (matchptr <= context->ValidHistory)) { matchptr++ ; *historyptr++ = *currentptr++ ; cbMatch++ ; }
// First output the backpointer
//
if (backptr >= 320) { backptr -= 320 ; out_bits_8((0xc000 + backptr) >> 8) ; // 110 + 13 bits
out_bits_8((backptr)) ; } else if (backptr < 64) { // 1111 + 6 bits
backptr += 0x3c0 ; out_bits_10(backptr); } else { backptr += (0xE00 - 64); // 1110 + 8 bits
out_bits_12(backptr); }
// output the length of the match encoding
//
switch (cbMatch) { case 3: out_bit_0(); // length of 3 - most common
break; case 4: out_bits_4(8); break; case 5: out_bits_4(9); break; case 6: out_bits_4(10); break; case 7: out_bits_4(11); break; case 8: out_bits_6(48); break; case 9: out_bits_6(49); break; case 10: out_bits_6(50); break; case 11: out_bits_6(51); break; case 12: out_bits_6(52); break; case 13: out_bits_6(53); break; case 14: out_bits_6(54); break; case 15: out_bits_6(55); break; case 16: out_bits_8(0xe0); break; case 17: out_bits_8(0xe1); break; case 18: out_bits_8(0xe2); break; case 19: out_bits_8(0xe3); break; case 20: out_bits_8(0xe4); break; case 21: out_bits_8(0xe5); break; case 22: out_bits_8(0xe6); break; case 23: out_bits_8(0xe7); break; case 24: out_bits_8(0xe8); break; case 25: out_bits_8(0xe9); break; case 26: out_bits_8(0xea); break; case 27: out_bits_8(0xeb); break; case 28: out_bits_8(0xec); break; case 29: out_bits_8(0xed); break; case 30: out_bits_8(0xee); break; case 31: out_bits_8(0xef); break; default: if (cbMatch < 64) { out_bits_4(0xF) ; cbMatch -= 32 ; out_bits_6(cbMatch) ; } else if (cbMatch < 128) { out_bits_5(0x1F) ; cbMatch -= 64 ; out_bits_7(cbMatch) ; } else if (cbMatch < 256) { out_bits_6(0x3F) ; cbMatch -= 128 ; out_bits_8(cbMatch) ; } else if (cbMatch < 512) { out_bits_7(0x7F) ; cbMatch -= 256 ; out_bits_9(cbMatch) ; } else if (cbMatch < 1024) { out_bits_8(0xFF) ; cbMatch -= 512 ; out_bits_10(cbMatch) ; } else if (cbMatch < 2048) { out_bits_9(0x1FF) ; cbMatch -= 1024 ; out_bits_11(cbMatch) ; } else if (cbMatch < 4096) { out_bits_10(0x3FF) ; cbMatch -= 2048 ; out_bits_12(cbMatch) ; } else if (cbMatch < 8192) { out_bits_11(0x7FF) ; cbMatch -= 4096 ; out_bits_13(cbMatch) ; } else { // 8192 and greater
out_bits_12(0xFFF) ; cbMatch -= 8192 ; out_bits_14(cbMatch) ; } break ; }
} else { // encode a literal
// temp=literallookup[context->History[i-1]] ;
literal= hashchar1 ;
if (literal & 0x80) { literal += 0x80; out_bits_9(literal) ; } else { out_bits_8(literal) ; }
}
} // while
// get any remaining chars as literals
while (currentptr <= endptr) {
// temp=literallookup[context->History[i-1]] ;
literal=*currentptr ;
if (literal & 0x80) { literal += 0x80; out_bits_9(literal) ; } else { out_bits_8(literal) ; }
*historyptr++ = *currentptr++ ; }
bitptr_end() ;
// Check if we had expansion instead of compression
//
if ((ULONG)(pbyte - CompOutBuffer) > *CurrentLength) { // expansion.
//
// We don't need to do this copy since we can just signal the outside world
// that compression did not take place and the valid data is still in the
// current buffer
//
// RtlMoveMemory(CompOutBuffer, CurrentBuffer, *CurrentLength) ;
memset (context->History, 0, sizeof(context->History)) ; memset (context->HashTable, 0, sizeof(context->HashTable)) ;#ifdef COMP_12K
status = 0 ;#else
status = PACKET_FLUSHED;#endif
context->CurrentIndex = HISTORY_SIZE+1 ; // this forces a start over next time
} else { // compression successful
*CurrentLength = (ULONG)(pbyte - CompOutBuffer);
//
// the compressed data is now in CompOutBuffer - tonybe 01-12-95
//
// *CurrentLength = pbyte - CurrentBuffer ;
status |= PACKET_COMPRESSED ; context->CurrentIndex = (int)(historyptr - context->History) ; }
return(status);}
//* getcontextsizes()
//
// Function: Returns size of send and receive context blocks
//
// Parameters: OUT send -> sizeof(SendContext)
// OUT recv -> sizeof(RecvContext)
//
// Returns: Nothing
//
//*
voidgetcontextsizes (long *send, long *recv){ *send = sizeof(SendContext) ; *recv = sizeof(RecvContext) ;}
//* initsendcontext()
//
// Function: Initialize SendContext block
//
// Parameters: IN context -> connection compress context
//
// Returns: Nothing
//
//*
voidinitsendcontext (SendContext *context){ context->CurrentIndex = 0; // Index into the history
context->ValidHistory = 0 ; // reset valid history
memset (context->HashTable, 0, sizeof(context->HashTable)) ; memset (context->History, 0, sizeof(context->HashTable)) ;}
//* initrecvcontext()
//
// Function: Initialize RecvContext block
//
// Parameters: IN context -> connection decompress context
//
// Returns: Nothing
//
//*
voidinitrecvcontext (RecvContext *context){ context->CurrentPtr = context->History ;
#if DBG
context->DebugFence = DEBUG_FENCE_VALUE;#endif
memset (context->History, 0, sizeof(context->History)) ;}
//* decompress()
//
// Function: de-compression function.
//
// Parameters: IN inbuf -> points to data to be uncompressed
// IN inlen -> length of data
// IN start -> flag indicating whether to start with a clean history buffer
// OUT output-> decompressed data
// OUT outlen-> lenght of decompressed data
// IN context -> connection decompress context
//
// Returns: TRUE if decompress was successful
// FALSE if it wasnt
//
// WARNING: CODE IS HIGHLY OPTIMIZED FOR TIME.
//
//*
intdecompress( UCHAR *inbuf, int inlen, int start, UCHAR **output, int *outlen, RecvContext *context){ UCHAR *inend; // When we know we're done decompressing
UCHAR *outstart; // Remember where in dbuf we started
UCHAR *current;
int backptr; // Back pointer for copy items
int length; // Where to copy from in dbuf
UCHAR *s1, *s2;
int bitset; int bit; int byte; UCHAR *pbyte; UCHAR *historyend = context->History + HISTORY_SIZE ;
inend = inbuf + inlen ;
//
// Start out looking at the first bit
//
inbit_start(inbuf);
if (start) // start over clean?
context->CurrentPtr = current = context->History ; else current = context->CurrentPtr ;
//
// Save our starting position
//
outstart = current;
//
// Decompress until we run out of input
//
while (pbyte < inend) {
//
// Jump on what to do with these three bits.
//
in_bits_3(length);
switch (length) {
case 0: in_bits_5(length) ; goto LITERAL ;
case 1: in_bits_5(length) ; length += 32 ; goto LITERAL ;
case 2: in_bits_5(length) ; length += 64 ; goto LITERAL ;
case 3: in_bits_5(length) ; length += 96 ; goto LITERAL ;
case 4: in_bits_6(length) ; length +=128 ; goto LITERAL ;
case 5: in_bits_6(length) ; length +=192 ; goto LITERAL ;
case 6: in_bits_13 (backptr) ; // 110 - 14 bit offset
backptr+=320 ; break ;
case 7: in_bit() ; if (bitset) { in_bits_6(backptr) ; } else { in_bits_8(backptr) ; backptr+=64 ; } break ; }
//
// If we reach here, it's a copy item
//
//
// Now get the length
//
in_bit() ; // 1st length bit
if (!bitset) { length = 3 ; goto DONE ; }
in_bit() ; // 2nd length bit
if (!bitset) { in_bits_2 (length) ; length += 4 ; goto DONE ; }
in_bit() ; // 3rd length bit
if (!bitset) { in_bits_3 (length) ; length += 8 ; goto DONE ; }
in_bit() ; // 4th length bit
if (!bitset) { in_bits_4 (length) ; length += 16 ; goto DONE ; }
in_bit() ; // 5th length bit
if (!bitset) { in_bits_5 (length) ; length += 32 ; goto DONE ; }
in_bit() ; // 6th length bit
if (!bitset) { in_bits_6 (length) ; length += 64 ; goto DONE ; }
in_bit() ; // 7th length bit
if (!bitset) { in_bits_7 (length) ; length += 128 ; goto DONE ; }
in_bit() ; // 8th length bit
if (!bitset) { in_bits_8 (length) ; length += 256 ; goto DONE ; }
in_bit() ; // 9th length bit
if (!bitset) { in_bits_9 (length) ; length += 512 ; goto DONE ; }
in_bit() ; // 10th length bit
if (!bitset) { in_bits_10 (length) ; length += 1024 ; goto DONE ; }
//
// length cannot be greater than max packets size which is 1500
//
#if DBG
DbgPrint("NDISWAN: RAS Decompressor problem1: Possible data corruption\n");#endif
return FALSE ;
DONE: //
// Turn the backptr into an index location
//
#ifdef COMP_12K
s2 = current - backptr ;#else
s2 = context->History + (((current - context->History) - backptr) & (HISTORY_SIZE -1)) ;#endif
s1 = current;
current += length;
// if we are past the end of the history this is a bad sign: abort decompression
//
if (current >= historyend) {#if DBG
DbgPrint("NDISWAN: RAS Decompressor problem2: Possible data corruption\n");#endif
return FALSE ; }
// loop unrolled to handle lenght>backptr case
//
*s1=*s2; *(s1+1)=*(s2+1); s1+=2; s2+=2; length-=2;
//
// copy all the bytes
//
while (length) { *s1++=*s2++; length--; }
//
// We have another copy item, and no literals
//
continue;
LITERAL:
//
// We have a literal
//
if (current >= historyend) {#if DBG
DbgPrint("NDISWAN: RAS Decompressor problem3: Possible data corruption\n");#endif
return FALSE ; }
//*current++ = literallookup[length];
*current++ = (UCHAR)length;
} // while loop
// End case:
//
if (current >= historyend) {#if DBG
DbgPrint("NDISWAN: RAS Decompressor problem4: Possible data corruption\n");#endif
return FALSE ; }
if ((bit == 16) && (pbyte == inend)) { *current++ = *(pbyte -1) ; }
#if DBG
if (context->DebugFence != DEBUG_FENCE_VALUE) { DbgPrint("Decompression Error!\n"); DbgPrint("context %p, current %p, outstart %p\n", context, current, outstart); DbgPrint("inbuf %p, inlength %d, start %p\n", inbuf, inlen, start); DbgBreakPoint(); }#endif
*outlen = (int)(current - outstart) ; // the length of decompressed data
*output = context->CurrentPtr ;
context->CurrentPtr = current ;
return TRUE ;}
//
// This function uses the 16 byte user session key and the 8 byte
// challenge to create an intial 16 byte encryption session key.
//
VOIDGetStartKeyFromSHA( PCRYPTO_INFO CryptoInfo, PUCHAR Challenge ){ UCHAR Digest[A_SHA_DIGEST_LEN]; UCHAR SessionKeyChallenge[MAX_USERSESSIONKEY_SIZE + MAX_CHALLENGE_SIZE];
NdisZeroMemory(Digest, A_SHA_DIGEST_LEN);
//
// Copy the start session key
//
NdisMoveMemory(SessionKeyChallenge, CryptoInfo->StartKey, MAX_USERSESSIONKEY_SIZE);
//
// Append the challenge
//
NdisMoveMemory((PUCHAR)(SessionKeyChallenge + MAX_USERSESSIONKEY_SIZE), Challenge, MAX_CHALLENGE_SIZE);
//
// SHAInit(context)
// SHAUpdate(context, sessionkey, sessionkeylength)
// SHAUpdate(context, sessionkeychallenge, sessionkeylength + challengelength)
// SHAFinal(context, digest)
//
// Start key is the first 16 bytes of the digest.
//
A_SHAInit(CryptoInfo->Context);
A_SHAUpdate(CryptoInfo->Context, CryptoInfo->StartKey, MAX_USERSESSIONKEY_SIZE);
A_SHAUpdate(CryptoInfo->Context, SessionKeyChallenge, MAX_USERSESSIONKEY_SIZE + MAX_CHALLENGE_SIZE);
A_SHAFinal(CryptoInfo->Context, Digest);
NdisMoveMemory(CryptoInfo->StartKey, Digest, CryptoInfo->SessionKeyLength);
NdisMoveMemory(CryptoInfo->SessionKey, Digest, CryptoInfo->SessionKeyLength);}
VOIDGetNewKeyFromSHA( PCRYPTO_INFO CryptoInfo ){ UCHAR Digest[A_SHA_DIGEST_LEN];
NdisZeroMemory(Digest, A_SHA_DIGEST_LEN);
A_SHAInit(CryptoInfo->Context); A_SHAUpdate(CryptoInfo->Context, CryptoInfo->StartKey, CryptoInfo->SessionKeyLength); A_SHAUpdate(CryptoInfo->Context, SHApad1, 40); A_SHAUpdate(CryptoInfo->Context, CryptoInfo->SessionKey, CryptoInfo->SessionKeyLength); A_SHAUpdate(CryptoInfo->Context, SHApad2, 40); A_SHAFinal(CryptoInfo->Context, Digest);
NdisMoveMemory(CryptoInfo->SessionKey, Digest, CryptoInfo->SessionKeyLength);}
VOIDGetMasterKey( PCRYPTO_INFO CryptoInfo, PUCHAR NTResponse ){ UCHAR Digest[A_SHA_DIGEST_LEN]; PVOID Context;
NdisZeroMemory(Digest, A_SHA_DIGEST_LEN);
Context = CryptoInfo->Context;
A_SHAInit(Context);
#ifdef DEBUG_CCP
{ PUCHAR Key;
Key = CryptoInfo->StartKey;
DbgPrint("GMK-UserSessionKey: %.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x\n", Key[0],Key[1],Key[2],Key[3], Key[4],Key[5],Key[6],Key[7], Key[8],Key[9],Key[10],Key[11], Key[12],Key[13],Key[14],Key[15]);
Key = NTResponse;
DbgPrint("GMK-NTResponse: %.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x\n", Key[0],Key[1],Key[2],Key[3], Key[4],Key[5],Key[6],Key[7], Key[8],Key[9],Key[10],Key[11], Key[12],Key[13],Key[14],Key[15]);
DbgPrint(" %.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x\n", Key[16],Key[17],Key[18],Key[19], Key[20],Key[21],Key[22],Key[23]); }#endif
A_SHAUpdate(Context, CryptoInfo->StartKey, MAX_USERSESSIONKEY_SIZE);
A_SHAUpdate(Context, NTResponse, MAX_NT_RESPONSE);
A_SHAUpdate(Context, "This is the MPPE Master Key", 27);
A_SHAFinal(Context, Digest);
NdisMoveMemory(CryptoInfo->StartKey, Digest, MAX_USERSESSIONKEY_SIZE);
#ifdef DEBUG_CCP
{ PUCHAR Key;
Key = CryptoInfo->StartKey;
DbgPrint("MasterKey: %.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x\n", Key[0],Key[1],Key[2],Key[3], Key[4],Key[5],Key[6],Key[7], Key[8],Key[9],Key[10],Key[11], Key[12],Key[13],Key[14],Key[15]);
}#endif
}
VOIDGetAsymetricStartKey( PCRYPTO_INFO CryptoInfo, BOOLEAN IsSend ){ UCHAR Digest[A_SHA_DIGEST_LEN]; PVOID Context; PUCHAR s;
NdisZeroMemory(Digest, A_SHA_DIGEST_LEN);
Context = CryptoInfo->Context;
if (IsSend) { if (CryptoInfo->Flags & CRYPTO_IS_SERVER) { s = ClntRSrvS; } else { s = ClntSSrvR; } } else { if (CryptoInfo->Flags & CRYPTO_IS_SERVER) { s = ClntSSrvR; } else { s = ClntRSrvS; } }
#ifdef DEBUG_CCP
{ PUCHAR Key;
Key = CryptoInfo->StartKey;
DbgPrint("GASK-StartKey: %.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x\n", Key[0],Key[1],Key[2],Key[3], Key[4],Key[5],Key[6],Key[7], Key[8],Key[9],Key[10],Key[11], Key[12],Key[13],Key[14],Key[15]);
DbgPrint("GASK-String: %s\n", s); }#endif
A_SHAInit(Context);
A_SHAUpdate(Context, CryptoInfo->StartKey, MAX_USERSESSIONKEY_SIZE);
A_SHAUpdate(Context,SHApad1,40);
A_SHAUpdate(Context,s,strlen(s));
A_SHAUpdate(Context,SHApad2,40);
A_SHAFinal(Context,Digest);
NdisMoveMemory(CryptoInfo->StartKey, Digest, CryptoInfo->SessionKeyLength);
NdisMoveMemory(CryptoInfo->SessionKey, Digest, CryptoInfo->SessionKeyLength);
#ifdef DEBUG_CCP
{ PUCHAR Key;
Key = CryptoInfo->StartKey;
DbgPrint("%s %s AsymetricKey: %.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x\n", (CryptoInfo->Flags & CRYPTO_IS_SERVER) ? "Server" : "Client", (IsSend) ? "Send" : "Recv", Key[0],Key[1],Key[2],Key[3], Key[4],Key[5],Key[6],Key[7], Key[8],Key[9],Key[10],Key[11], Key[12],Key[13],Key[14],Key[15]);
}#endif
}
/* Copyright (C) RSA Data Security, Inc. created 1993. This is an
unpublished work protected as such under copyright law. This work contains proprietary, confidential, and trade secret information of RSA Data Security, Inc. Use, disclosure or reproduction without the express written authorization of RSA Data Security, Inc. is prohibited. */
/* SHA initialization. Begins an SHA operation, writing a new context.
*/void A_SHAInitCommon (context)A_SHA_COMM_CTX *context;{ context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
*/ context->state[0] = 0x67452301; context->state[1] = 0xefcdab89; context->state[2] = 0x98badcfe; context->state[3] = 0x10325476; context->state[4] = 0xc3d2e1f0;}
/* SHA block update operation. Continues an SHA message-digest
operation, processing another message block, and updating the context. */void A_SHAUpdateCommon (context, partIn, partInLen, Transform)A_SHA_COMM_CTX *context;unsigned char *partIn;ULONG partInLen;A_SHA_TRANSFORM *Transform;{ unsigned int bufferLen;
/* Compute length of buffer */ bufferLen = (unsigned int)(context->count[1] & 0x3f);
/* Update number of bytes */ if ((context->count[1] += partInLen) < partInLen) context->count[0]++;
/* If previous input in buffer, buffer new input and transform if
possible. */ if (bufferLen > 0 && bufferLen + partInLen >= 64) { NdisMoveMemory(context->buffer+bufferLen, partIn, 64-bufferLen); partIn += (64-bufferLen); partInLen -= (64-bufferLen); (*Transform) (context->state, context->buffer); bufferLen = 0; }
/* Transform directly from input.
*/ while (partInLen >= 64) { (*Transform) (context->state, partIn); partIn += 64; partInLen -= 64; }
/* Buffer remaining input */ NdisMoveMemory((context->buffer+bufferLen), partIn, partInLen);}
/* SHA finalization. Ends an SHA message-digest operation, writing
the message digest and zeroizing the context. */void A_SHAFinalCommon (context, digest, Transform)A_SHA_COMM_CTX *context;unsigned char digest[A_SHA_DIGEST_LEN];A_SHA_TRANSFORM *Transform;{ ULONG bitCount[2]; unsigned char pad[72]; unsigned int padLen;
/* Compute padding: 80 00 00 ... 00 00 <bit count>
*/ padLen = 64 - (unsigned int)(context->count[1] & 0x3f); if (padLen <= 8) padLen += 64; pad[0] = 0x80; NdisZeroMemory(pad+1, padLen-7); bitCount[0] = (context->count[0] << 3) | (context->count[1] >> 29); bitCount[1] = context->count[1] << 3; ByteReverse ((UNALIGNED ULONG*)(pad+padLen-8), bitCount, 2);
/* Digest padding */ A_SHAUpdateCommon (context, pad, padLen, Transform);
/* Store digest */ ByteReverse ((UNALIGNED ULONG*)digest, context->state, 5);
/* Restart the context */ A_SHAInitCommon (context);}
void A_SHAInit (A_SHA_CTX *context){ A_SHAInitCommon (&context->commonContext);}
void A_SHAUpdate (context, partIn, partInLen)A_SHA_CTX *context;unsigned char *partIn;unsigned int partInLen;{ A_SHAUpdateCommon (&context->commonContext, partIn, partInLen, SHATransform);}
void A_SHAFinal (context, digest)A_SHA_CTX *context;unsigned char digest[A_SHA_DIGEST_LEN];{ A_SHAFinalCommon (&context->commonContext, digest, SHATransform);}
void SHATransform (state, block)ULONG state[5];unsigned char block[64];{ ULONG a = state[0], b = state[1], c = state[2], d = state[3], e = state[4], x[80];
ByteReverse (x, (ULONG*)block, 16); SHAExpand (x);
/* Round 1 */ FF (a, b, c, d, e, x[ 0]); FF (e, a, b, c, d, x[ 1]); FF (d, e, a, b, c, x[ 2]); FF (c, d, e, a, b, x[ 3]); FF (b, c, d, e, a, x[ 4]); FF (a, b, c, d, e, x[ 5]); FF (e, a, b, c, d, x[ 6]); FF (d, e, a, b, c, x[ 7]); FF (c, d, e, a, b, x[ 8]); FF (b, c, d, e, a, x[ 9]); FF (a, b, c, d, e, x[10]); FF (e, a, b, c, d, x[11]); FF (d, e, a, b, c, x[12]); FF (c, d, e, a, b, x[13]); FF (b, c, d, e, a, x[14]); FF (a, b, c, d, e, x[15]); FF (e, a, b, c, d, x[16]); FF (d, e, a, b, c, x[17]); FF (c, d, e, a, b, x[18]); FF (b, c, d, e, a, x[19]);
/* Round 2 */ GG (a, b, c, d, e, x[20]); GG (e, a, b, c, d, x[21]); GG (d, e, a, b, c, x[22]); GG (c, d, e, a, b, x[23]); GG (b, c, d, e, a, x[24]); GG (a, b, c, d, e, x[25]); GG (e, a, b, c, d, x[26]); GG (d, e, a, b, c, x[27]); GG (c, d, e, a, b, x[28]); GG (b, c, d, e, a, x[29]); GG (a, b, c, d, e, x[30]); GG (e, a, b, c, d, x[31]); GG (d, e, a, b, c, x[32]); GG (c, d, e, a, b, x[33]); GG (b, c, d, e, a, x[34]); GG (a, b, c, d, e, x[35]); GG (e, a, b, c, d, x[36]); GG (d, e, a, b, c, x[37]); GG (c, d, e, a, b, x[38]); GG (b, c, d, e, a, x[39]);
/* Round 3 */ HH (a, b, c, d, e, x[40]); HH (e, a, b, c, d, x[41]); HH (d, e, a, b, c, x[42]); HH (c, d, e, a, b, x[43]); HH (b, c, d, e, a, x[44]); HH (a, b, c, d, e, x[45]); HH (e, a, b, c, d, x[46]); HH (d, e, a, b, c, x[47]); HH (c, d, e, a, b, x[48]); HH (b, c, d, e, a, x[49]); HH (a, b, c, d, e, x[50]); HH (e, a, b, c, d, x[51]); HH (d, e, a, b, c, x[52]); HH (c, d, e, a, b, x[53]); HH (b, c, d, e, a, x[54]); HH (a, b, c, d, e, x[55]); HH (e, a, b, c, d, x[56]); HH (d, e, a, b, c, x[57]); HH (c, d, e, a, b, x[58]); HH (b, c, d, e, a, x[59]);
/* Round 4 */ II (a, b, c, d, e, x[60]); II (e, a, b, c, d, x[61]); II (d, e, a, b, c, x[62]); II (c, d, e, a, b, x[63]); II (b, c, d, e, a, x[64]); II (a, b, c, d, e, x[65]); II (e, a, b, c, d, x[66]); II (d, e, a, b, c, x[67]); II (c, d, e, a, b, x[68]); II (b, c, d, e, a, x[69]); II (a, b, c, d, e, x[70]); II (e, a, b, c, d, x[71]); II (d, e, a, b, c, x[72]); II (c, d, e, a, b, x[73]); II (b, c, d, e, a, x[74]); II (a, b, c, d, e, x[75]); II (e, a, b, c, d, x[76]); II (d, e, a, b, c, x[77]); II (c, d, e, a, b, x[78]); II (b, c, d, e, a, x[79]);
state[0] += a; state[1] += b; state[2] += c; state[3] += d; state[4] += e;
/* Zeroize potentially sensitive information.
*/ NdisZeroMemory((void *)x, sizeof (x));}
/* Expands x[0..15] into x[16..79], according to the recurrence
x[i] = x[i-3] ^ x[i-8] ^ x[i-14] ^ x[i-16]. */void SHAExpand (x)ULONG x[80];{ unsigned int i; ULONG tmp;
for (i = 16; i < 80; i++) { tmp = x[i-3] ^ x[i-8] ^ x[i-14] ^ x[i-16]; x[i] = (tmp << 1) | (tmp >> 31); }}
VOIDByteReverse( UNALIGNED ULONG *Out, ULONG *In, ULONG Count ){ ULONG i; ULONG Value;
for (i = 0; i < Count; i++) { Value = (ULONG)(In[i] << 16) | (In[i] >> 16); Out[i] = ((Value & 0xFF00FF00L) >> 8) | ((Value & 0x00FF00FFL) << 8); }}
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