crypto/ec/ecp_nistp256.c

1437  * Base point pre computation
1876 void EC_nistp256_pre_comp_free(NISTP256_PRE_COMP *pre)
1880     if (pre == NULL)
1883     CRYPTO_DOWN_REF(&pre->references, &i, pre->lock);
1884     REF_PRINT_COUNT("EC_nistp256", pre);
1889     CRYPTO_THREAD_lock_free(pre->lock);
1890     OPENSSL_free(pre);
2042     NISTP256_PRE_COMP *pre = NULL;
2057         pre = group->pre_comp.nistp256;
2058         if (pre)
2060             g_pre_comp = (const smallfelem(*)[16][3])pre->g_pre_comp;
2231     NISTP256_PRE_COMP *pre = NULL;
2266     if ((pre = nistp256_pre_comp_new()) == NULL)
2272         memcpy(pre->g_pre_comp, gmul, sizeof(pre->g_pre_comp));
2279     felem_shrink(pre->g_pre_comp[0][1][0], x_tmp);
2280     felem_shrink(pre->g_pre_comp[0][1][1], y_tmp);
2281     felem_shrink(pre->g_pre_comp[0][1][2], z_tmp);
2287         point_double_small(pre->g_pre_comp[1][i][0], pre->g_pre_comp[1][i][1],
2288                            pre->g_pre_comp[1][i][2], pre->g_pre_comp[0][i][0],
2289                            pre->g_pre_comp[0][i][1],
2290                            pre->g_pre_comp[0][i][2]);
2292             point_double_small(pre->g_pre_comp[1][i][0],
2293                                pre->g_pre_comp[1][i][1],
2294                                pre->g_pre_comp[1][i][2],
2295                                pre->g_pre_comp[1][i][0],
2296                                pre->g_pre_comp[1][i][1],
2297                                pre->g_pre_comp[1][i][2]);
2301         point_double_small(pre->g_pre_comp[0][2 * i][0],
2302                            pre->g_pre_comp[0][2 * i][1],
2303                            pre->g_pre_comp[0][2 * i][2],
2304                            pre->g_pre_comp[1][i][0], pre->g_pre_comp[1][i][1],
2305                            pre->g_pre_comp[1][i][2]);
2307             point_double_small(pre->g_pre_comp[0][2 * i][0],
2308                                pre->g_pre_comp[0][2 * i][1],
2309                                pre->g_pre_comp[0][2 * i][2],
2310                                pre->g_pre_comp[0][2 * i][0],
2311                                pre->g_pre_comp[0][2 * i][1],
2312                                pre->g_pre_comp[0][2 * i][2]);
2317         memset(pre->g_pre_comp[i][0], 0, sizeof(pre->g_pre_comp[i][0]));
2320         point_add_small(pre->g_pre_comp[i][6][0], pre->g_pre_comp[i][6][1],
2321                         pre->g_pre_comp[i][6][2], pre->g_pre_comp[i][4][0],
2322                         pre->g_pre_comp[i][4][1], pre->g_pre_comp[i][4][2],
2323                         pre->g_pre_comp[i][2][0], pre->g_pre_comp[i][2][1],
2324                         pre->g_pre_comp[i][2][2]);
2326         point_add_small(pre->g_pre_comp[i][10][0], pre->g_pre_comp[i][10][1],
2327                         pre->g_pre_comp[i][10][2], pre->g_pre_comp[i][8][0],
2328                         pre->g_pre_comp[i][8][1], pre->g_pre_comp[i][8][2],
2329                         pre->g_pre_comp[i][2][0], pre->g_pre_comp[i][2][1],
2330                         pre->g_pre_comp[i][2][2]);
2332         point_add_small(pre->g_pre_comp[i][12][0], pre->g_pre_comp[i][12][1],
2333                         pre->g_pre_comp[i][12][2], pre->g_pre_comp[i][8][0],
2334                         pre->g_pre_comp[i][8][1], pre->g_pre_comp[i][8][2],
2335                         pre->g_pre_comp[i][4][0], pre->g_pre_comp[i][4][1],
2336                         pre->g_pre_comp[i][4][2]);
2340         point_add_small(pre->g_pre_comp[i][14][0], pre->g_pre_comp[i][14][1],
2341                         pre->g_pre_comp[i][14][2], pre->g_pre_comp[i][12][0],
2342                         pre->g_pre_comp[i][12][1], pre->g_pre_comp[i][12][2],
2343                         pre->g_pre_comp[i][2][0], pre->g_pre_comp[i][2][1],
2344                         pre->g_pre_comp[i][2][2]);
2347             point_add_small(pre->g_pre_comp[i][2 * j + 1][0],
2348                             pre->g_pre_comp[i][2 * j + 1][1],
2349                             pre->g_pre_comp[i][2 * j + 1][2],
2350                             pre->g_pre_comp[i][2 * j][0],
2351                             pre->g_pre_comp[i][2 * j][1],
2352                             pre->g_pre_comp[i][2 * j][2],
2353                             pre->g_pre_comp[i][1][0],
2354                             pre->g_pre_comp[i][1][1],
2355                             pre->g_pre_comp[i][1][2]);
2358     make_points_affine(31, &(pre->g_pre_comp[0][1]), tmp_smallfelems);
2361     SETPRECOMP(group, nistp256, pre);
2362     pre = NULL;
2371     EC_nistp256_pre_comp_free(pre);