pqcrypto/crypto_kem/kyber768/clean/precomp.c

#include "inttypes.h"
#include "ntt.h"
#include "params.h"

/* Precomputed constants for the forward NTT and inverse NTT.
 * Computed using Pari/GP as follows:
 *
brv=[0,128,64,192,32,160,96,224,16,144,80,208,48,176,112,240, \
     8,136,72,200,40,168,104,232,24,152,88,216,56,184,120,248, \
     4,132,68,196,36,164,100,228,20,148,84,212,52,180,116,244, \
     12,140,76,204,44,172,108,236,28,156,92,220,60,188,124,252, \
     2,130,66,194,34,162,98,226,18,146,82,210,50,178,114,242, \
     10,138,74,202,42,170,106,234,26,154,90,218,58,186,122,250, \
     6,134,70,198,38,166,102,230,22,150,86,214,54,182,118,246, \
     14,142,78,206,46,174,110,238,30,158,94,222,62,190,126,254, \
     1,129,65,193,33,161,97,225,17,145,81,209,49,177,113,241, \
     9,137,73,201,41,169,105,233,25,153,89,217,57,185,121,249, \
     5,133,69,197,37,165,101,229,21,149,85,213,53,181,117,245, \
     13,141,77,205,45,173,109,237,29,157,93,221,61,189,125,253, \
     3,131,67,195,35,163,99,227,19,147,83,211,51,179,115,243, \
     11,139,75,203,43,171,107,235,27,155,91,219,59,187,123,251, \
     7,135,71,199,39,167,103,231,23,151,87,215,55,183,119,247, \
     15,143,79,207,47,175,111,239,31,159,95,223,63,191,127,255];

q = 7681;
n = 256;
mont = Mod(2^18,q);

g=0; for(i=2,q-1,if(znorder(Mod(i,q)) == 2*n, g=Mod(i,q); break))

zetas = lift(vector(n, i, g^(brv[i])*mont))
omegas_inv_bitrev_montgomery = lift(vector(n/2, i,
(g^2)^(-brv[2*(i-1)+1])*mont)) psis_inv_montgomery = lift(vector(n, i,
g^(-(i-1))/n*mont))

*/

const uint16_t PQCLEAN_KYBER768_CLEAN_zetas[KYBER_N] = {
    990,  7427, 2634, 6819, 578,  3281, 2143, 1095, 484,  6362, 3336, 5382,
    6086, 3823, 877,  5656, 3583, 7010, 6414, 263,  1285, 291,  7143, 7338,
    1581, 5134, 5184, 5932, 4042, 5775, 2468, 3,    606,  729,  5383, 962,
    3240, 7548, 5129, 7653, 5929, 4965, 2461, 641,  1584, 2666, 1142, 157,
    7407, 5222, 5602, 5142, 6140, 5485, 4931, 1559, 2085, 5284, 2056, 3538,
    7269, 3535, 7190, 1957, 3465, 6792, 1538, 4664, 2023, 7643, 3660, 7673,
    1694, 6905, 3995, 3475, 5939, 1859, 6910, 4434, 1019, 1492, 7087, 4761,
    657,  4859, 5798, 2640, 1693, 2607, 2782, 5400, 6466, 1010, 957,  3851,
    2121, 6392, 7319, 3367, 3659, 3375, 6430, 7583, 1549, 5856, 4773, 6084,
    5544, 1650, 3997, 4390, 6722, 2915, 4245, 2635, 6128, 7676, 5737, 1616,
    3457, 3132, 7196, 4702, 6239, 851,  2122, 3009, 7613, 7295, 2007, 323,
    5112, 3716, 2289, 6442, 6965, 2713, 7126, 3401, 963,  6596, 607,  5027,
    7078, 4484, 5937, 944,  2860, 2680, 5049, 1777, 5850, 3387, 6487, 6777,
    4812, 4724, 7077, 186,  6848, 6793, 3463, 5877, 1174, 7116, 3077, 5945,
    6591, 590,  6643, 1337, 6036, 3991, 1675, 2053, 6055, 1162, 1679, 3883,
    4311, 2106, 6163, 4486, 6374, 5006, 4576, 4288, 5180, 4102, 282,  6119,
    7443, 6330, 3184, 4971, 2530, 5325, 4171, 7185, 5175, 5655, 1898, 382,
    7211, 43,   5965, 6073, 1730, 332,  1577, 3304, 2329, 1699, 6150, 2379,
    5113, 333,  3502, 4517, 1480, 1172, 5567, 651,  925,  4573, 599,  1367,
    4109, 1863, 6929, 1605, 3866, 2065, 4048, 839,  5764, 2447, 2022, 3345,
    1990, 4067, 2036, 2069, 3567, 7371, 2368, 339,  6947, 2159, 654,  7327,
    2768, 6676, 987,  2214
};

const uint16_t PQCLEAN_KYBER768_CLEAN_omegas_inv_bitrev_montgomery[KYBER_N / 2] = {
    990,  254,  862,  5047, 6586, 5538, 4400, 7103, 2025, 6804, 3858, 1595,
    2299, 4345, 1319, 7197, 7678, 5213, 1906, 3639, 1749, 2497, 2547, 6100,
    343,  538,  7390, 6396, 7418, 1267, 671,  4098, 5724, 491,  4146, 412,
    4143, 5625, 2397, 5596, 6122, 2750, 2196, 1541, 2539, 2079, 2459, 274,
    7524, 6539, 5015, 6097, 7040, 5220, 2716, 1752, 28,   2552, 133,  4441,
    6719, 2298, 6952, 7075, 4672, 5559, 6830, 1442, 2979, 485,  4549, 4224,
    6065, 1944, 5,    1553, 5046, 3436, 4766, 959,  3291, 3684, 6031, 2137,
    1597, 2908, 1825, 6132, 98,   1251, 4306, 4022, 4314, 362,  1289, 5560,
    3830, 6724, 6671, 1215, 2281, 4899, 5074, 5988, 5041, 1883, 2822, 7024,
    2920, 594,  6189, 6662, 3247, 771,  5822, 1742, 4206, 3686, 776,  5987,
    8,    4021, 38,   5658, 3017, 6143, 889,  4216
};

const uint16_t PQCLEAN_KYBER768_CLEAN_psis_inv_montgomery[KYBER_N] = {
    1024, 4972, 5779, 6907, 4943, 4168, 315,  5580, 90,   497,  1123, 142,
    4710, 5527, 2443, 4871, 698,  2489, 2394, 4003, 684,  2241, 2390, 7224,
    5072, 2064, 4741, 1687, 6841, 482,  7441, 1235, 2126, 4742, 2802, 5744,
    6287, 4933, 699,  3604, 1297, 2127, 5857, 1705, 3868, 3779, 4397, 2177,
    159,  622,  2240, 1275, 640,  6948, 4572, 5277, 209,  2605, 1157, 7328,
    5817, 3191, 1662, 2009, 4864, 574,  2487, 164,  6197, 4436, 7257, 3462,
    4268, 4281, 3414, 4515, 3170, 1290, 2003, 5855, 7156, 6062, 7531, 1732,
    3249, 4884, 7512, 3590, 1049, 2123, 1397, 6093, 3691, 6130, 6541, 3946,
    6258, 3322, 1788, 4241, 4900, 2309, 1400, 1757, 400,  502,  6698, 2338,
    3011, 668,  7444, 4580, 6516, 6795, 2959, 4136, 3040, 2279, 6355, 3943,
    2913, 6613, 7416, 4084, 6508, 5556, 4054, 3782, 61,   6567, 2212, 779,
    632,  5709, 5667, 4923, 4911, 6893, 4695, 4164, 3536, 2287, 7594, 2848,
    3267, 1911, 3128, 546,  1991, 156,  4958, 5531, 6903, 483,  875,  138,
    250,  2234, 2266, 7222, 2842, 4258, 812,  6703, 232,  5207, 6650, 2585,
    1900, 6225, 4932, 7265, 4701, 3173, 4635, 6393, 227,  7313, 4454, 4284,
    6759, 1224, 5223, 1447, 395,  2608, 4502, 4037, 189,  3348, 54,   6443,
    2210, 6230, 2826, 1780, 3002, 5995, 1955, 6102, 6045, 3938, 5019, 4417,
    1434, 1262, 1507, 5847, 5917, 7157, 7177, 6434, 7537, 741,  4348, 1309,
    145,  374,  2236, 4496, 5028, 6771, 6923, 7421, 1978, 1023, 3857, 6876,
    1102, 7451, 4704, 6518, 1344, 765,  384,  5705, 1207, 1630, 4734, 1563,
    6839, 5933, 1954, 4987, 7142, 5814, 7527, 4953, 7637, 4707, 2182, 5734,
    2818, 541,  4097, 5641
};