Botan  1.11.15
src/lib/block/cast/cast128.cpp
Go to the documentation of this file.
00001 /*
00002 * CAST-128
00003 * (C) 1999-2007 Jack Lloyd
00004 *
00005 * Botan is released under the Simplified BSD License (see license.txt)
00006 */
00007 
00008 #include <botan/internal/block_utils.h>
00009 #include <botan/cast128.h>
00010 #include <botan/internal/cast_sboxes.h>
00011 
00012 namespace Botan {
00013 
00014 BOTAN_REGISTER_BLOCK_CIPHER_NAMED_NOARGS(CAST_128, "CAST-128");
00015 
00016 namespace {
00017 
00018 /*
00019 * CAST-128 Round Type 1
00020 */
00021 inline void R1(u32bit& L, u32bit R, u32bit MK, byte RK)
00022    {
00023    u32bit T = rotate_left(MK + R, RK);
00024    L ^= (CAST_SBOX1[get_byte(0, T)] ^ CAST_SBOX2[get_byte(1, T)]) -
00025          CAST_SBOX3[get_byte(2, T)] + CAST_SBOX4[get_byte(3, T)];
00026    }
00027 
00028 /*
00029 * CAST-128 Round Type 2
00030 */
00031 inline void R2(u32bit& L, u32bit R, u32bit MK, byte RK)
00032    {
00033    u32bit T = rotate_left(MK ^ R, RK);
00034    L ^= (CAST_SBOX1[get_byte(0, T)]  - CAST_SBOX2[get_byte(1, T)] +
00035          CAST_SBOX3[get_byte(2, T)]) ^ CAST_SBOX4[get_byte(3, T)];
00036    }
00037 
00038 /*
00039 * CAST-128 Round Type 3
00040 */
00041 inline void R3(u32bit& L, u32bit R, u32bit MK, byte RK)
00042    {
00043    u32bit T = rotate_left(MK - R, RK);
00044    L ^= ((CAST_SBOX1[get_byte(0, T)]  + CAST_SBOX2[get_byte(1, T)]) ^
00045           CAST_SBOX3[get_byte(2, T)]) - CAST_SBOX4[get_byte(3, T)];
00046    }
00047 
00048 }
00049 
00050 /*
00051 * CAST-128 Encryption
00052 */
00053 void CAST_128::encrypt_n(const byte in[], byte out[], size_t blocks) const
00054    {
00055    for(size_t i = 0; i != blocks; ++i)
00056       {
00057       u32bit L = load_be<u32bit>(in, 0);
00058       u32bit R = load_be<u32bit>(in, 1);
00059 
00060       R1(L, R, MK[ 0], RK[ 0]);
00061       R2(R, L, MK[ 1], RK[ 1]);
00062       R3(L, R, MK[ 2], RK[ 2]);
00063       R1(R, L, MK[ 3], RK[ 3]);
00064       R2(L, R, MK[ 4], RK[ 4]);
00065       R3(R, L, MK[ 5], RK[ 5]);
00066       R1(L, R, MK[ 6], RK[ 6]);
00067       R2(R, L, MK[ 7], RK[ 7]);
00068       R3(L, R, MK[ 8], RK[ 8]);
00069       R1(R, L, MK[ 9], RK[ 9]);
00070       R2(L, R, MK[10], RK[10]);
00071       R3(R, L, MK[11], RK[11]);
00072       R1(L, R, MK[12], RK[12]);
00073       R2(R, L, MK[13], RK[13]);
00074       R3(L, R, MK[14], RK[14]);
00075       R1(R, L, MK[15], RK[15]);
00076 
00077       store_be(out, R, L);
00078 
00079       in += BLOCK_SIZE;
00080       out += BLOCK_SIZE;
00081       }
00082    }
00083 
00084 /*
00085 * CAST-128 Decryption
00086 */
00087 void CAST_128::decrypt_n(const byte in[], byte out[], size_t blocks) const
00088    {
00089    for(size_t i = 0; i != blocks; ++i)
00090       {
00091       u32bit L = load_be<u32bit>(in, 0);
00092       u32bit R = load_be<u32bit>(in, 1);
00093 
00094       R1(L, R, MK[15], RK[15]);
00095       R3(R, L, MK[14], RK[14]);
00096       R2(L, R, MK[13], RK[13]);
00097       R1(R, L, MK[12], RK[12]);
00098       R3(L, R, MK[11], RK[11]);
00099       R2(R, L, MK[10], RK[10]);
00100       R1(L, R, MK[ 9], RK[ 9]);
00101       R3(R, L, MK[ 8], RK[ 8]);
00102       R2(L, R, MK[ 7], RK[ 7]);
00103       R1(R, L, MK[ 6], RK[ 6]);
00104       R3(L, R, MK[ 5], RK[ 5]);
00105       R2(R, L, MK[ 4], RK[ 4]);
00106       R1(L, R, MK[ 3], RK[ 3]);
00107       R3(R, L, MK[ 2], RK[ 2]);
00108       R2(L, R, MK[ 1], RK[ 1]);
00109       R1(R, L, MK[ 0], RK[ 0]);
00110 
00111       store_be(out, R, L);
00112 
00113       in += BLOCK_SIZE;
00114       out += BLOCK_SIZE;
00115       }
00116    }
00117 
00118 /*
00119 * CAST-128 Key Schedule
00120 */
00121 void CAST_128::key_schedule(const byte key[], size_t length)
00122    {
00123    MK.resize(48);
00124    RK.resize(48);
00125 
00126    secure_vector<u32bit> X(4);
00127    for(size_t i = 0; i != length; ++i)
00128       X[i/4] = (X[i/4] << 8) + key[i];
00129 
00130    cast_ks(MK, X);
00131 
00132    secure_vector<u32bit> RK32(48);
00133    cast_ks(RK32, X);
00134 
00135    for(size_t i = 0; i != 16; ++i)
00136       RK[i] = RK32[i] % 32;
00137    }
00138 
00139 void CAST_128::clear()
00140    {
00141    zap(MK);
00142    zap(RK);
00143    }
00144 
00145 /*
00146 * S-Box Based Key Expansion
00147 */
00148 void CAST_128::cast_ks(secure_vector<u32bit>& K,
00149                        secure_vector<u32bit>& X)
00150    {
00151    static const u32bit S5[256] = {
00152       0x7EC90C04, 0x2C6E74B9, 0x9B0E66DF, 0xA6337911, 0xB86A7FFF, 0x1DD358F5,
00153       0x44DD9D44, 0x1731167F, 0x08FBF1FA, 0xE7F511CC, 0xD2051B00, 0x735ABA00,
00154       0x2AB722D8, 0x386381CB, 0xACF6243A, 0x69BEFD7A, 0xE6A2E77F, 0xF0C720CD,
00155       0xC4494816, 0xCCF5C180, 0x38851640, 0x15B0A848, 0xE68B18CB, 0x4CAADEFF,
00156       0x5F480A01, 0x0412B2AA, 0x259814FC, 0x41D0EFE2, 0x4E40B48D, 0x248EB6FB,
00157       0x8DBA1CFE, 0x41A99B02, 0x1A550A04, 0xBA8F65CB, 0x7251F4E7, 0x95A51725,
00158       0xC106ECD7, 0x97A5980A, 0xC539B9AA, 0x4D79FE6A, 0xF2F3F763, 0x68AF8040,
00159       0xED0C9E56, 0x11B4958B, 0xE1EB5A88, 0x8709E6B0, 0xD7E07156, 0x4E29FEA7,
00160       0x6366E52D, 0x02D1C000, 0xC4AC8E05, 0x9377F571, 0x0C05372A, 0x578535F2,
00161       0x2261BE02, 0xD642A0C9, 0xDF13A280, 0x74B55BD2, 0x682199C0, 0xD421E5EC,
00162       0x53FB3CE8, 0xC8ADEDB3, 0x28A87FC9, 0x3D959981, 0x5C1FF900, 0xFE38D399,
00163       0x0C4EFF0B, 0x062407EA, 0xAA2F4FB1, 0x4FB96976, 0x90C79505, 0xB0A8A774,
00164       0xEF55A1FF, 0xE59CA2C2, 0xA6B62D27, 0xE66A4263, 0xDF65001F, 0x0EC50966,
00165       0xDFDD55BC, 0x29DE0655, 0x911E739A, 0x17AF8975, 0x32C7911C, 0x89F89468,
00166       0x0D01E980, 0x524755F4, 0x03B63CC9, 0x0CC844B2, 0xBCF3F0AA, 0x87AC36E9,
00167       0xE53A7426, 0x01B3D82B, 0x1A9E7449, 0x64EE2D7E, 0xCDDBB1DA, 0x01C94910,
00168       0xB868BF80, 0x0D26F3FD, 0x9342EDE7, 0x04A5C284, 0x636737B6, 0x50F5B616,
00169       0xF24766E3, 0x8ECA36C1, 0x136E05DB, 0xFEF18391, 0xFB887A37, 0xD6E7F7D4,
00170       0xC7FB7DC9, 0x3063FCDF, 0xB6F589DE, 0xEC2941DA, 0x26E46695, 0xB7566419,
00171       0xF654EFC5, 0xD08D58B7, 0x48925401, 0xC1BACB7F, 0xE5FF550F, 0xB6083049,
00172       0x5BB5D0E8, 0x87D72E5A, 0xAB6A6EE1, 0x223A66CE, 0xC62BF3CD, 0x9E0885F9,
00173       0x68CB3E47, 0x086C010F, 0xA21DE820, 0xD18B69DE, 0xF3F65777, 0xFA02C3F6,
00174       0x407EDAC3, 0xCBB3D550, 0x1793084D, 0xB0D70EBA, 0x0AB378D5, 0xD951FB0C,
00175       0xDED7DA56, 0x4124BBE4, 0x94CA0B56, 0x0F5755D1, 0xE0E1E56E, 0x6184B5BE,
00176       0x580A249F, 0x94F74BC0, 0xE327888E, 0x9F7B5561, 0xC3DC0280, 0x05687715,
00177       0x646C6BD7, 0x44904DB3, 0x66B4F0A3, 0xC0F1648A, 0x697ED5AF, 0x49E92FF6,
00178       0x309E374F, 0x2CB6356A, 0x85808573, 0x4991F840, 0x76F0AE02, 0x083BE84D,
00179       0x28421C9A, 0x44489406, 0x736E4CB8, 0xC1092910, 0x8BC95FC6, 0x7D869CF4,
00180       0x134F616F, 0x2E77118D, 0xB31B2BE1, 0xAA90B472, 0x3CA5D717, 0x7D161BBA,
00181       0x9CAD9010, 0xAF462BA2, 0x9FE459D2, 0x45D34559, 0xD9F2DA13, 0xDBC65487,
00182       0xF3E4F94E, 0x176D486F, 0x097C13EA, 0x631DA5C7, 0x445F7382, 0x175683F4,
00183       0xCDC66A97, 0x70BE0288, 0xB3CDCF72, 0x6E5DD2F3, 0x20936079, 0x459B80A5,
00184       0xBE60E2DB, 0xA9C23101, 0xEBA5315C, 0x224E42F2, 0x1C5C1572, 0xF6721B2C,
00185       0x1AD2FFF3, 0x8C25404E, 0x324ED72F, 0x4067B7FD, 0x0523138E, 0x5CA3BC78,
00186       0xDC0FD66E, 0x75922283, 0x784D6B17, 0x58EBB16E, 0x44094F85, 0x3F481D87,
00187       0xFCFEAE7B, 0x77B5FF76, 0x8C2302BF, 0xAAF47556, 0x5F46B02A, 0x2B092801,
00188       0x3D38F5F7, 0x0CA81F36, 0x52AF4A8A, 0x66D5E7C0, 0xDF3B0874, 0x95055110,
00189       0x1B5AD7A8, 0xF61ED5AD, 0x6CF6E479, 0x20758184, 0xD0CEFA65, 0x88F7BE58,
00190       0x4A046826, 0x0FF6F8F3, 0xA09C7F70, 0x5346ABA0, 0x5CE96C28, 0xE176EDA3,
00191       0x6BAC307F, 0x376829D2, 0x85360FA9, 0x17E3FE2A, 0x24B79767, 0xF5A96B20,
00192       0xD6CD2595, 0x68FF1EBF, 0x7555442C, 0xF19F06BE, 0xF9E0659A, 0xEEB9491D,
00193       0x34010718, 0xBB30CAB8, 0xE822FE15, 0x88570983, 0x750E6249, 0xDA627E55,
00194       0x5E76FFA8, 0xB1534546, 0x6D47DE08, 0xEFE9E7D4 };
00195 
00196    static const u32bit S6[256] = {
00197       0xF6FA8F9D, 0x2CAC6CE1, 0x4CA34867, 0xE2337F7C, 0x95DB08E7, 0x016843B4,
00198       0xECED5CBC, 0x325553AC, 0xBF9F0960, 0xDFA1E2ED, 0x83F0579D, 0x63ED86B9,
00199       0x1AB6A6B8, 0xDE5EBE39, 0xF38FF732, 0x8989B138, 0x33F14961, 0xC01937BD,
00200       0xF506C6DA, 0xE4625E7E, 0xA308EA99, 0x4E23E33C, 0x79CBD7CC, 0x48A14367,
00201       0xA3149619, 0xFEC94BD5, 0xA114174A, 0xEAA01866, 0xA084DB2D, 0x09A8486F,
00202       0xA888614A, 0x2900AF98, 0x01665991, 0xE1992863, 0xC8F30C60, 0x2E78EF3C,
00203       0xD0D51932, 0xCF0FEC14, 0xF7CA07D2, 0xD0A82072, 0xFD41197E, 0x9305A6B0,
00204       0xE86BE3DA, 0x74BED3CD, 0x372DA53C, 0x4C7F4448, 0xDAB5D440, 0x6DBA0EC3,
00205       0x083919A7, 0x9FBAEED9, 0x49DBCFB0, 0x4E670C53, 0x5C3D9C01, 0x64BDB941,
00206       0x2C0E636A, 0xBA7DD9CD, 0xEA6F7388, 0xE70BC762, 0x35F29ADB, 0x5C4CDD8D,
00207       0xF0D48D8C, 0xB88153E2, 0x08A19866, 0x1AE2EAC8, 0x284CAF89, 0xAA928223,
00208       0x9334BE53, 0x3B3A21BF, 0x16434BE3, 0x9AEA3906, 0xEFE8C36E, 0xF890CDD9,
00209       0x80226DAE, 0xC340A4A3, 0xDF7E9C09, 0xA694A807, 0x5B7C5ECC, 0x221DB3A6,
00210       0x9A69A02F, 0x68818A54, 0xCEB2296F, 0x53C0843A, 0xFE893655, 0x25BFE68A,
00211       0xB4628ABC, 0xCF222EBF, 0x25AC6F48, 0xA9A99387, 0x53BDDB65, 0xE76FFBE7,
00212       0xE967FD78, 0x0BA93563, 0x8E342BC1, 0xE8A11BE9, 0x4980740D, 0xC8087DFC,
00213       0x8DE4BF99, 0xA11101A0, 0x7FD37975, 0xDA5A26C0, 0xE81F994F, 0x9528CD89,
00214       0xFD339FED, 0xB87834BF, 0x5F04456D, 0x22258698, 0xC9C4C83B, 0x2DC156BE,
00215       0x4F628DAA, 0x57F55EC5, 0xE2220ABE, 0xD2916EBF, 0x4EC75B95, 0x24F2C3C0,
00216       0x42D15D99, 0xCD0D7FA0, 0x7B6E27FF, 0xA8DC8AF0, 0x7345C106, 0xF41E232F,
00217       0x35162386, 0xE6EA8926, 0x3333B094, 0x157EC6F2, 0x372B74AF, 0x692573E4,
00218       0xE9A9D848, 0xF3160289, 0x3A62EF1D, 0xA787E238, 0xF3A5F676, 0x74364853,
00219       0x20951063, 0x4576698D, 0xB6FAD407, 0x592AF950, 0x36F73523, 0x4CFB6E87,
00220       0x7DA4CEC0, 0x6C152DAA, 0xCB0396A8, 0xC50DFE5D, 0xFCD707AB, 0x0921C42F,
00221       0x89DFF0BB, 0x5FE2BE78, 0x448F4F33, 0x754613C9, 0x2B05D08D, 0x48B9D585,
00222       0xDC049441, 0xC8098F9B, 0x7DEDE786, 0xC39A3373, 0x42410005, 0x6A091751,
00223       0x0EF3C8A6, 0x890072D6, 0x28207682, 0xA9A9F7BE, 0xBF32679D, 0xD45B5B75,
00224       0xB353FD00, 0xCBB0E358, 0x830F220A, 0x1F8FB214, 0xD372CF08, 0xCC3C4A13,
00225       0x8CF63166, 0x061C87BE, 0x88C98F88, 0x6062E397, 0x47CF8E7A, 0xB6C85283,
00226       0x3CC2ACFB, 0x3FC06976, 0x4E8F0252, 0x64D8314D, 0xDA3870E3, 0x1E665459,
00227       0xC10908F0, 0x513021A5, 0x6C5B68B7, 0x822F8AA0, 0x3007CD3E, 0x74719EEF,
00228       0xDC872681, 0x073340D4, 0x7E432FD9, 0x0C5EC241, 0x8809286C, 0xF592D891,
00229       0x08A930F6, 0x957EF305, 0xB7FBFFBD, 0xC266E96F, 0x6FE4AC98, 0xB173ECC0,
00230       0xBC60B42A, 0x953498DA, 0xFBA1AE12, 0x2D4BD736, 0x0F25FAAB, 0xA4F3FCEB,
00231       0xE2969123, 0x257F0C3D, 0x9348AF49, 0x361400BC, 0xE8816F4A, 0x3814F200,
00232       0xA3F94043, 0x9C7A54C2, 0xBC704F57, 0xDA41E7F9, 0xC25AD33A, 0x54F4A084,
00233       0xB17F5505, 0x59357CBE, 0xEDBD15C8, 0x7F97C5AB, 0xBA5AC7B5, 0xB6F6DEAF,
00234       0x3A479C3A, 0x5302DA25, 0x653D7E6A, 0x54268D49, 0x51A477EA, 0x5017D55B,
00235       0xD7D25D88, 0x44136C76, 0x0404A8C8, 0xB8E5A121, 0xB81A928A, 0x60ED5869,
00236       0x97C55B96, 0xEAEC991B, 0x29935913, 0x01FDB7F1, 0x088E8DFA, 0x9AB6F6F5,
00237       0x3B4CBF9F, 0x4A5DE3AB, 0xE6051D35, 0xA0E1D855, 0xD36B4CF1, 0xF544EDEB,
00238       0xB0E93524, 0xBEBB8FBD, 0xA2D762CF, 0x49C92F54, 0x38B5F331, 0x7128A454,
00239       0x48392905, 0xA65B1DB8, 0x851C97BD, 0xD675CF2F };
00240 
00241    static const u32bit S7[256] = {
00242       0x85E04019, 0x332BF567, 0x662DBFFF, 0xCFC65693, 0x2A8D7F6F, 0xAB9BC912,
00243       0xDE6008A1, 0x2028DA1F, 0x0227BCE7, 0x4D642916, 0x18FAC300, 0x50F18B82,
00244       0x2CB2CB11, 0xB232E75C, 0x4B3695F2, 0xB28707DE, 0xA05FBCF6, 0xCD4181E9,
00245       0xE150210C, 0xE24EF1BD, 0xB168C381, 0xFDE4E789, 0x5C79B0D8, 0x1E8BFD43,
00246       0x4D495001, 0x38BE4341, 0x913CEE1D, 0x92A79C3F, 0x089766BE, 0xBAEEADF4,
00247       0x1286BECF, 0xB6EACB19, 0x2660C200, 0x7565BDE4, 0x64241F7A, 0x8248DCA9,
00248       0xC3B3AD66, 0x28136086, 0x0BD8DFA8, 0x356D1CF2, 0x107789BE, 0xB3B2E9CE,
00249       0x0502AA8F, 0x0BC0351E, 0x166BF52A, 0xEB12FF82, 0xE3486911, 0xD34D7516,
00250       0x4E7B3AFF, 0x5F43671B, 0x9CF6E037, 0x4981AC83, 0x334266CE, 0x8C9341B7,
00251       0xD0D854C0, 0xCB3A6C88, 0x47BC2829, 0x4725BA37, 0xA66AD22B, 0x7AD61F1E,
00252       0x0C5CBAFA, 0x4437F107, 0xB6E79962, 0x42D2D816, 0x0A961288, 0xE1A5C06E,
00253       0x13749E67, 0x72FC081A, 0xB1D139F7, 0xF9583745, 0xCF19DF58, 0xBEC3F756,
00254       0xC06EBA30, 0x07211B24, 0x45C28829, 0xC95E317F, 0xBC8EC511, 0x38BC46E9,
00255       0xC6E6FA14, 0xBAE8584A, 0xAD4EBC46, 0x468F508B, 0x7829435F, 0xF124183B,
00256       0x821DBA9F, 0xAFF60FF4, 0xEA2C4E6D, 0x16E39264, 0x92544A8B, 0x009B4FC3,
00257       0xABA68CED, 0x9AC96F78, 0x06A5B79A, 0xB2856E6E, 0x1AEC3CA9, 0xBE838688,
00258       0x0E0804E9, 0x55F1BE56, 0xE7E5363B, 0xB3A1F25D, 0xF7DEBB85, 0x61FE033C,
00259       0x16746233, 0x3C034C28, 0xDA6D0C74, 0x79AAC56C, 0x3CE4E1AD, 0x51F0C802,
00260       0x98F8F35A, 0x1626A49F, 0xEED82B29, 0x1D382FE3, 0x0C4FB99A, 0xBB325778,
00261       0x3EC6D97B, 0x6E77A6A9, 0xCB658B5C, 0xD45230C7, 0x2BD1408B, 0x60C03EB7,
00262       0xB9068D78, 0xA33754F4, 0xF430C87D, 0xC8A71302, 0xB96D8C32, 0xEBD4E7BE,
00263       0xBE8B9D2D, 0x7979FB06, 0xE7225308, 0x8B75CF77, 0x11EF8DA4, 0xE083C858,
00264       0x8D6B786F, 0x5A6317A6, 0xFA5CF7A0, 0x5DDA0033, 0xF28EBFB0, 0xF5B9C310,
00265       0xA0EAC280, 0x08B9767A, 0xA3D9D2B0, 0x79D34217, 0x021A718D, 0x9AC6336A,
00266       0x2711FD60, 0x438050E3, 0x069908A8, 0x3D7FEDC4, 0x826D2BEF, 0x4EEB8476,
00267       0x488DCF25, 0x36C9D566, 0x28E74E41, 0xC2610ACA, 0x3D49A9CF, 0xBAE3B9DF,
00268       0xB65F8DE6, 0x92AEAF64, 0x3AC7D5E6, 0x9EA80509, 0xF22B017D, 0xA4173F70,
00269       0xDD1E16C3, 0x15E0D7F9, 0x50B1B887, 0x2B9F4FD5, 0x625ABA82, 0x6A017962,
00270       0x2EC01B9C, 0x15488AA9, 0xD716E740, 0x40055A2C, 0x93D29A22, 0xE32DBF9A,
00271       0x058745B9, 0x3453DC1E, 0xD699296E, 0x496CFF6F, 0x1C9F4986, 0xDFE2ED07,
00272       0xB87242D1, 0x19DE7EAE, 0x053E561A, 0x15AD6F8C, 0x66626C1C, 0x7154C24C,
00273       0xEA082B2A, 0x93EB2939, 0x17DCB0F0, 0x58D4F2AE, 0x9EA294FB, 0x52CF564C,
00274       0x9883FE66, 0x2EC40581, 0x763953C3, 0x01D6692E, 0xD3A0C108, 0xA1E7160E,
00275       0xE4F2DFA6, 0x693ED285, 0x74904698, 0x4C2B0EDD, 0x4F757656, 0x5D393378,
00276       0xA132234F, 0x3D321C5D, 0xC3F5E194, 0x4B269301, 0xC79F022F, 0x3C997E7E,
00277       0x5E4F9504, 0x3FFAFBBD, 0x76F7AD0E, 0x296693F4, 0x3D1FCE6F, 0xC61E45BE,
00278       0xD3B5AB34, 0xF72BF9B7, 0x1B0434C0, 0x4E72B567, 0x5592A33D, 0xB5229301,
00279       0xCFD2A87F, 0x60AEB767, 0x1814386B, 0x30BCC33D, 0x38A0C07D, 0xFD1606F2,
00280       0xC363519B, 0x589DD390, 0x5479F8E6, 0x1CB8D647, 0x97FD61A9, 0xEA7759F4,
00281       0x2D57539D, 0x569A58CF, 0xE84E63AD, 0x462E1B78, 0x6580F87E, 0xF3817914,
00282       0x91DA55F4, 0x40A230F3, 0xD1988F35, 0xB6E318D2, 0x3FFA50BC, 0x3D40F021,
00283       0xC3C0BDAE, 0x4958C24C, 0x518F36B2, 0x84B1D370, 0x0FEDCE83, 0x878DDADA,
00284       0xF2A279C7, 0x94E01BE8, 0x90716F4B, 0x954B8AA3 };
00285 
00286    static const u32bit S8[256] = {
00287       0xE216300D, 0xBBDDFFFC, 0xA7EBDABD, 0x35648095, 0x7789F8B7, 0xE6C1121B,
00288       0x0E241600, 0x052CE8B5, 0x11A9CFB0, 0xE5952F11, 0xECE7990A, 0x9386D174,
00289       0x2A42931C, 0x76E38111, 0xB12DEF3A, 0x37DDDDFC, 0xDE9ADEB1, 0x0A0CC32C,
00290       0xBE197029, 0x84A00940, 0xBB243A0F, 0xB4D137CF, 0xB44E79F0, 0x049EEDFD,
00291       0x0B15A15D, 0x480D3168, 0x8BBBDE5A, 0x669DED42, 0xC7ECE831, 0x3F8F95E7,
00292       0x72DF191B, 0x7580330D, 0x94074251, 0x5C7DCDFA, 0xABBE6D63, 0xAA402164,
00293       0xB301D40A, 0x02E7D1CA, 0x53571DAE, 0x7A3182A2, 0x12A8DDEC, 0xFDAA335D,
00294       0x176F43E8, 0x71FB46D4, 0x38129022, 0xCE949AD4, 0xB84769AD, 0x965BD862,
00295       0x82F3D055, 0x66FB9767, 0x15B80B4E, 0x1D5B47A0, 0x4CFDE06F, 0xC28EC4B8,
00296       0x57E8726E, 0x647A78FC, 0x99865D44, 0x608BD593, 0x6C200E03, 0x39DC5FF6,
00297       0x5D0B00A3, 0xAE63AFF2, 0x7E8BD632, 0x70108C0C, 0xBBD35049, 0x2998DF04,
00298       0x980CF42A, 0x9B6DF491, 0x9E7EDD53, 0x06918548, 0x58CB7E07, 0x3B74EF2E,
00299       0x522FFFB1, 0xD24708CC, 0x1C7E27CD, 0xA4EB215B, 0x3CF1D2E2, 0x19B47A38,
00300       0x424F7618, 0x35856039, 0x9D17DEE7, 0x27EB35E6, 0xC9AFF67B, 0x36BAF5B8,
00301       0x09C467CD, 0xC18910B1, 0xE11DBF7B, 0x06CD1AF8, 0x7170C608, 0x2D5E3354,
00302       0xD4DE495A, 0x64C6D006, 0xBCC0C62C, 0x3DD00DB3, 0x708F8F34, 0x77D51B42,
00303       0x264F620F, 0x24B8D2BF, 0x15C1B79E, 0x46A52564, 0xF8D7E54E, 0x3E378160,
00304       0x7895CDA5, 0x859C15A5, 0xE6459788, 0xC37BC75F, 0xDB07BA0C, 0x0676A3AB,
00305       0x7F229B1E, 0x31842E7B, 0x24259FD7, 0xF8BEF472, 0x835FFCB8, 0x6DF4C1F2,
00306       0x96F5B195, 0xFD0AF0FC, 0xB0FE134C, 0xE2506D3D, 0x4F9B12EA, 0xF215F225,
00307       0xA223736F, 0x9FB4C428, 0x25D04979, 0x34C713F8, 0xC4618187, 0xEA7A6E98,
00308       0x7CD16EFC, 0x1436876C, 0xF1544107, 0xBEDEEE14, 0x56E9AF27, 0xA04AA441,
00309       0x3CF7C899, 0x92ECBAE6, 0xDD67016D, 0x151682EB, 0xA842EEDF, 0xFDBA60B4,
00310       0xF1907B75, 0x20E3030F, 0x24D8C29E, 0xE139673B, 0xEFA63FB8, 0x71873054,
00311       0xB6F2CF3B, 0x9F326442, 0xCB15A4CC, 0xB01A4504, 0xF1E47D8D, 0x844A1BE5,
00312       0xBAE7DFDC, 0x42CBDA70, 0xCD7DAE0A, 0x57E85B7A, 0xD53F5AF6, 0x20CF4D8C,
00313       0xCEA4D428, 0x79D130A4, 0x3486EBFB, 0x33D3CDDC, 0x77853B53, 0x37EFFCB5,
00314       0xC5068778, 0xE580B3E6, 0x4E68B8F4, 0xC5C8B37E, 0x0D809EA2, 0x398FEB7C,
00315       0x132A4F94, 0x43B7950E, 0x2FEE7D1C, 0x223613BD, 0xDD06CAA2, 0x37DF932B,
00316       0xC4248289, 0xACF3EBC3, 0x5715F6B7, 0xEF3478DD, 0xF267616F, 0xC148CBE4,
00317       0x9052815E, 0x5E410FAB, 0xB48A2465, 0x2EDA7FA4, 0xE87B40E4, 0xE98EA084,
00318       0x5889E9E1, 0xEFD390FC, 0xDD07D35B, 0xDB485694, 0x38D7E5B2, 0x57720101,
00319       0x730EDEBC, 0x5B643113, 0x94917E4F, 0x503C2FBA, 0x646F1282, 0x7523D24A,
00320       0xE0779695, 0xF9C17A8F, 0x7A5B2121, 0xD187B896, 0x29263A4D, 0xBA510CDF,
00321       0x81F47C9F, 0xAD1163ED, 0xEA7B5965, 0x1A00726E, 0x11403092, 0x00DA6D77,
00322       0x4A0CDD61, 0xAD1F4603, 0x605BDFB0, 0x9EEDC364, 0x22EBE6A8, 0xCEE7D28A,
00323       0xA0E736A0, 0x5564A6B9, 0x10853209, 0xC7EB8F37, 0x2DE705CA, 0x8951570F,
00324       0xDF09822B, 0xBD691A6C, 0xAA12E4F2, 0x87451C0F, 0xE0F6A27A, 0x3ADA4819,
00325       0x4CF1764F, 0x0D771C2B, 0x67CDB156, 0x350D8384, 0x5938FA0F, 0x42399EF3,
00326       0x36997B07, 0x0E84093D, 0x4AA93E61, 0x8360D87B, 0x1FA98B0C, 0x1149382C,
00327       0xE97625A5, 0x0614D1B7, 0x0E25244B, 0x0C768347, 0x589E8D82, 0x0D2059D1,
00328       0xA466BB1E, 0xF8DA0A82, 0x04F19130, 0xBA6E4EC0, 0x99265164, 0x1EE7230D,
00329       0x50B2AD80, 0xEAEE6801, 0x8DB2A283, 0xEA8BF59E };
00330 
00331    class ByteReader
00332       {
00333       public:
00334          byte operator()(size_t i) { return (X[i/4] >> (8*(3 - (i%4)))); }
00335          ByteReader(const u32bit* x) : X(x) {}
00336       private:
00337          const u32bit* X;
00338       };
00339 
00340    secure_vector<u32bit> Z(4);
00341    ByteReader x(&X[0]), z(&Z[0]);
00342 
00343    Z[0]  = X[0] ^ S5[x(13)] ^ S6[x(15)] ^ S7[x(12)] ^ S8[x(14)] ^ S7[x( 8)];
00344    Z[1]  = X[2] ^ S5[z( 0)] ^ S6[z( 2)] ^ S7[z( 1)] ^ S8[z( 3)] ^ S8[x(10)];
00345    Z[2]  = X[3] ^ S5[z( 7)] ^ S6[z( 6)] ^ S7[z( 5)] ^ S8[z( 4)] ^ S5[x( 9)];
00346    Z[3]  = X[1] ^ S5[z(10)] ^ S6[z( 9)] ^ S7[z(11)] ^ S8[z( 8)] ^ S6[x(11)];
00347    K[ 0] = S5[z( 8)] ^ S6[z( 9)] ^ S7[z( 7)] ^ S8[z( 6)] ^ S5[z( 2)];
00348    K[ 1] = S5[z(10)] ^ S6[z(11)] ^ S7[z( 5)] ^ S8[z( 4)] ^ S6[z( 6)];
00349    K[ 2] = S5[z(12)] ^ S6[z(13)] ^ S7[z( 3)] ^ S8[z( 2)] ^ S7[z( 9)];
00350    K[ 3] = S5[z(14)] ^ S6[z(15)] ^ S7[z( 1)] ^ S8[z( 0)] ^ S8[z(12)];
00351    X[0]  = Z[2] ^ S5[z( 5)] ^ S6[z( 7)] ^ S7[z( 4)] ^ S8[z( 6)] ^ S7[z( 0)];
00352    X[1]  = Z[0] ^ S5[x( 0)] ^ S6[x( 2)] ^ S7[x( 1)] ^ S8[x( 3)] ^ S8[z( 2)];
00353    X[2]  = Z[1] ^ S5[x( 7)] ^ S6[x( 6)] ^ S7[x( 5)] ^ S8[x( 4)] ^ S5[z( 1)];
00354    X[3]  = Z[3] ^ S5[x(10)] ^ S6[x( 9)] ^ S7[x(11)] ^ S8[x( 8)] ^ S6[z( 3)];
00355    K[ 4] = S5[x( 3)] ^ S6[x( 2)] ^ S7[x(12)] ^ S8[x(13)] ^ S5[x( 8)];
00356    K[ 5] = S5[x( 1)] ^ S6[x( 0)] ^ S7[x(14)] ^ S8[x(15)] ^ S6[x(13)];
00357    K[ 6] = S5[x( 7)] ^ S6[x( 6)] ^ S7[x( 8)] ^ S8[x( 9)] ^ S7[x( 3)];
00358    K[ 7] = S5[x( 5)] ^ S6[x( 4)] ^ S7[x(10)] ^ S8[x(11)] ^ S8[x( 7)];
00359    Z[0]  = X[0] ^ S5[x(13)] ^ S6[x(15)] ^ S7[x(12)] ^ S8[x(14)] ^ S7[x( 8)];
00360    Z[1]  = X[2] ^ S5[z( 0)] ^ S6[z( 2)] ^ S7[z( 1)] ^ S8[z( 3)] ^ S8[x(10)];
00361    Z[2]  = X[3] ^ S5[z( 7)] ^ S6[z( 6)] ^ S7[z( 5)] ^ S8[z( 4)] ^ S5[x( 9)];
00362    Z[3]  = X[1] ^ S5[z(10)] ^ S6[z( 9)] ^ S7[z(11)] ^ S8[z( 8)] ^ S6[x(11)];
00363    K[ 8] = S5[z( 3)] ^ S6[z( 2)] ^ S7[z(12)] ^ S8[z(13)] ^ S5[z( 9)];
00364    K[ 9] = S5[z( 1)] ^ S6[z( 0)] ^ S7[z(14)] ^ S8[z(15)] ^ S6[z(12)];
00365    K[10] = S5[z( 7)] ^ S6[z( 6)] ^ S7[z( 8)] ^ S8[z( 9)] ^ S7[z( 2)];
00366    K[11] = S5[z( 5)] ^ S6[z( 4)] ^ S7[z(10)] ^ S8[z(11)] ^ S8[z( 6)];
00367    X[0]  = Z[2] ^ S5[z( 5)] ^ S6[z( 7)] ^ S7[z( 4)] ^ S8[z( 6)] ^ S7[z( 0)];
00368    X[1]  = Z[0] ^ S5[x( 0)] ^ S6[x( 2)] ^ S7[x( 1)] ^ S8[x( 3)] ^ S8[z( 2)];
00369    X[2]  = Z[1] ^ S5[x( 7)] ^ S6[x( 6)] ^ S7[x( 5)] ^ S8[x( 4)] ^ S5[z( 1)];
00370    X[3]  = Z[3] ^ S5[x(10)] ^ S6[x( 9)] ^ S7[x(11)] ^ S8[x( 8)] ^ S6[z( 3)];
00371    K[12] = S5[x( 8)] ^ S6[x( 9)] ^ S7[x( 7)] ^ S8[x( 6)] ^ S5[x( 3)];
00372    K[13] = S5[x(10)] ^ S6[x(11)] ^ S7[x( 5)] ^ S8[x( 4)] ^ S6[x( 7)];
00373    K[14] = S5[x(12)] ^ S6[x(13)] ^ S7[x( 3)] ^ S8[x( 2)] ^ S7[x( 8)];
00374    K[15] = S5[x(14)] ^ S6[x(15)] ^ S7[x( 1)] ^ S8[x( 0)] ^ S8[x(13)];
00375    }
00376 
00377 }