crypto/ec/ecp_nistp521.c

1304  * Base point pre computation
1655     NISTP521_PRE_COMP *pre = pre_;
1657     if (!pre)
1660     i = CRYPTO_add(&pre->references, -1, CRYPTO_LOCK_EC_PRE_COMP);
1664     OPENSSL_free(pre);
1670     NISTP521_PRE_COMP *pre = pre_;
1672     if (!pre)
1675     i = CRYPTO_add(&pre->references, -1, CRYPTO_LOCK_EC_PRE_COMP);
1679     OPENSSL_cleanse(pre, sizeof(*pre));
1680     OPENSSL_free(pre);
1831     NISTP521_PRE_COMP *pre = NULL;
1848         pre = EC_EX_DATA_get_data(group->extra_data,
1852         if (pre)
1854             g_pre_comp = &pre->g_pre_comp[0];
2025     NISTP521_PRE_COMP *pre = NULL;
2052     if ((pre = nistp521_pre_comp_new()) == NULL)
2058         memcpy(pre->g_pre_comp, gmul, sizeof(pre->g_pre_comp));
2062     if ((!BN_to_felem(pre->g_pre_comp[1][0], &group->generator->X)) ||
2063         (!BN_to_felem(pre->g_pre_comp[1][1], &group->generator->Y)) ||
2064         (!BN_to_felem(pre->g_pre_comp[1][2], &group->generator->Z)))
2068         point_double(pre->g_pre_comp[2 * i][0], pre->g_pre_comp[2 * i][1],
2069                      pre->g_pre_comp[2 * i][2], pre->g_pre_comp[i][0],
2070                      pre->g_pre_comp[i][1], pre->g_pre_comp[i][2]);
2072             point_double(pre->g_pre_comp[2 * i][0],
2073                          pre->g_pre_comp[2 * i][1],
2074                          pre->g_pre_comp[2 * i][2],
2075                          pre->g_pre_comp[2 * i][0],
2076                          pre->g_pre_comp[2 * i][1],
2077                          pre->g_pre_comp[2 * i][2]);
2081     memset(pre->g_pre_comp[0], 0, sizeof(pre->g_pre_comp[0]));
2084     point_add(pre->g_pre_comp[6][0], pre->g_pre_comp[6][1],
2085               pre->g_pre_comp[6][2], pre->g_pre_comp[4][0],
2086               pre->g_pre_comp[4][1], pre->g_pre_comp[4][2],
2087               0, pre->g_pre_comp[2][0], pre->g_pre_comp[2][1],
2088               pre->g_pre_comp[2][2]);
2090     point_add(pre->g_pre_comp[10][0], pre->g_pre_comp[10][1],
2091               pre->g_pre_comp[10][2], pre->g_pre_comp[8][0],
2092               pre->g_pre_comp[8][1], pre->g_pre_comp[8][2],
2093               0, pre->g_pre_comp[2][0], pre->g_pre_comp[2][1],
2094               pre->g_pre_comp[2][2]);
2096     point_add(pre->g_pre_comp[12][0], pre->g_pre_comp[12][1],
2097               pre->g_pre_comp[12][2], pre->g_pre_comp[8][0],
2098               pre->g_pre_comp[8][1], pre->g_pre_comp[8][2],
2099               0, pre->g_pre_comp[4][0], pre->g_pre_comp[4][1],
2100               pre->g_pre_comp[4][2]);
2102     point_add(pre->g_pre_comp[14][0], pre->g_pre_comp[14][1],
2103               pre->g_pre_comp[14][2], pre->g_pre_comp[12][0],
2104               pre->g_pre_comp[12][1], pre->g_pre_comp[12][2],
2105               0, pre->g_pre_comp[2][0], pre->g_pre_comp[2][1],
2106               pre->g_pre_comp[2][2]);
2109         point_add(pre->g_pre_comp[2 * i + 1][0],
2110                   pre->g_pre_comp[2 * i + 1][1],
2111                   pre->g_pre_comp[2 * i + 1][2], pre->g_pre_comp[2 * i][0],
2112                   pre->g_pre_comp[2 * i][1], pre->g_pre_comp[2 * i][2], 0,
2113                   pre->g_pre_comp[1][0], pre->g_pre_comp[1][1],
2114                   pre->g_pre_comp[1][2]);
2116     make_points_affine(15, &(pre->g_pre_comp[1]), tmp_felems);
2118     if (!EC_EX_DATA_set_data(&group->extra_data, pre, nistp521_pre_comp_dup,
2123     pre = NULL;
2130     if (pre)
2131         nistp521_pre_comp_free(pre);