Lines Matching refs:sae
19 #include "sae.h"
22 int sae_set_group(struct sae_data *sae, int group)
35 sae_clear_data(sae);
36 tmp = sae->tmp = os_zalloc(sizeof(*tmp));
45 sae->group = group;
58 sae->group = group;
61 sae_clear_data(sae);
68 sae_clear_data(sae);
77 sae_clear_data(sae);
92 void sae_clear_temp_data(struct sae_data *sae)
95 if (sae == NULL || sae->tmp == NULL)
97 tmp = sae->tmp;
112 sae->tmp = NULL;
116 void sae_clear_data(struct sae_data *sae)
118 if (sae == NULL)
120 sae_clear_temp_data(sae);
121 crypto_bignum_deinit(sae->peer_commit_scalar, 0);
122 os_memset(sae, 0, sizeof(*sae));
140 static int sae_test_pwd_seed_ecc(struct sae_data *sae, const u8 *pwd_seed,
153 bits = crypto_ec_prime_len_bits(sae->tmp->ec);
155 prime, sae->tmp->prime_len, pwd_value, bits) < 0)
158 buf_shift_right(pwd_value, sae->tmp->prime_len, 8 - bits % 8);
160 pwd_value, sae->tmp->prime_len);
162 cmp_prime = const_time_memcmp(pwd_value, prime, sae->tmp->prime_len);
170 x_cand = crypto_bignum_init_set(pwd_value, sae->tmp->prime_len);
173 y_sqr = crypto_ec_point_compute_y_sqr(sae->tmp->ec, x_cand);
178 res = dragonfly_is_quadratic_residue_blind(sae->tmp->ec, qr, qnr,
189 static int sae_test_pwd_seed_ffc(struct sae_data *sae, const u8 *pwd_seed,
193 size_t bits = sae->tmp->prime_len * 8;
203 sae->tmp->dh->prime, sae->tmp->prime_len, pwd_value,
207 sae->tmp->prime_len);
210 res = const_time_memcmp(pwd_value, sae->tmp->dh->prime,
211 sae->tmp->prime_len);
225 a = crypto_bignum_init_set(pwd_value, sae->tmp->prime_len);
232 if (sae->tmp->dh->safe_prime) {
244 crypto_bignum_sub(sae->tmp->prime, b, b) < 0 ||
245 crypto_bignum_div(b, sae->tmp->order, b) < 0)
252 res = crypto_bignum_exptmod(a, b, sae->tmp->prime, pwe);
276 static int sae_derive_pwe_ecc(struct sae_data *sae, const u8 *addr1,
306 prime_len = sae->tmp->prime_len;
307 if (crypto_bignum_to_bin(sae->tmp->prime, prime, sizeof(prime),
315 if (dragonfly_get_random_qr_qnr(sae->tmp->prime, &qr, &qnr) < 0 ||
351 k = dragonfly_min_pwe_loop_iter(sae->group);
369 res = sae_test_pwd_seed_ecc(sae, pwd_seed,
405 if (!sae->tmp->pwe_ecc)
406 sae->tmp->pwe_ecc = crypto_ec_point_init(sae->tmp->ec);
407 if (!sae->tmp->pwe_ecc)
410 res = crypto_ec_point_solve_y_coord(sae->tmp->ec,
411 sae->tmp->pwe_ecc, x,
434 static int sae_derive_pwe_ffc(struct sae_data *sae, const u8 *addr1,
447 size_t prime_len = sae->tmp->prime_len * 8;
450 crypto_bignum_deinit(sae->tmp->pwe_ffc, 1);
451 sae->tmp->pwe_ffc = NULL;
482 k = dragonfly_min_pwe_loop_iter(sae->group);
498 res = sae_test_pwd_seed_ffc(sae, pwd_seed, pwe);
520 sae->tmp->pwe_ffc = crypto_bignum_init_set(pwe_buf, prime_len);
524 return sae->tmp->pwe_ffc ? 0 : -1;
528 static int sae_derive_commit_element_ecc(struct sae_data *sae,
532 if (!sae->tmp->own_commit_element_ecc) {
533 sae->tmp->own_commit_element_ecc =
534 crypto_ec_point_init(sae->tmp->ec);
535 if (!sae->tmp->own_commit_element_ecc)
539 if (crypto_ec_point_mul(sae->tmp->ec, sae->tmp->pwe_ecc, mask,
540 sae->tmp->own_commit_element_ecc) < 0 ||
541 crypto_ec_point_invert(sae->tmp->ec,
542 sae->tmp->own_commit_element_ecc) < 0) {
551 static int sae_derive_commit_element_ffc(struct sae_data *sae,
555 if (!sae->tmp->own_commit_element_ffc) {
556 sae->tmp->own_commit_element_ffc = crypto_bignum_init();
557 if (!sae->tmp->own_commit_element_ffc)
561 if (crypto_bignum_exptmod(sae->tmp->pwe_ffc, mask, sae->tmp->prime,
562 sae->tmp->own_commit_element_ffc) < 0 ||
563 crypto_bignum_inverse(sae->tmp->own_commit_element_ffc,
564 sae->tmp->prime,
565 sae->tmp->own_commit_element_ffc) < 0) {
574 static int sae_derive_commit(struct sae_data *sae)
580 if (!sae->tmp->sae_rand)
581 sae->tmp->sae_rand = crypto_bignum_init();
582 if (!sae->tmp->own_commit_scalar)
583 sae->tmp->own_commit_scalar = crypto_bignum_init();
584 ret = !mask || !sae->tmp->sae_rand || !sae->tmp->own_commit_scalar ||
585 dragonfly_generate_scalar(sae->tmp->order, sae->tmp->sae_rand,
587 sae->tmp->own_commit_scalar) < 0 ||
588 (sae->tmp->ec &&
589 sae_derive_commit_element_ecc(sae, mask) < 0) ||
590 (sae->tmp->dh &&
591 sae_derive_commit_element_ffc(sae, mask) < 0);
599 const char *identifier, struct sae_data *sae)
601 if (sae->tmp == NULL ||
602 (sae->tmp->ec && sae_derive_pwe_ecc(sae, addr1, addr2, password,
605 (sae->tmp->dh && sae_derive_pwe_ffc(sae, addr1, addr2, password,
608 sae_derive_commit(sae) < 0)
614 static int sae_derive_k_ecc(struct sae_data *sae, u8 *k)
619 K = crypto_ec_point_init(sae->tmp->ec);
630 if (crypto_ec_point_mul(sae->tmp->ec, sae->tmp->pwe_ecc,
631 sae->peer_commit_scalar, K) < 0 ||
632 crypto_ec_point_add(sae->tmp->ec, K,
633 sae->tmp->peer_commit_element_ecc, K) < 0 ||
634 crypto_ec_point_mul(sae->tmp->ec, K, sae->tmp->sae_rand, K) < 0 ||
635 crypto_ec_point_is_at_infinity(sae->tmp->ec, K) ||
636 crypto_ec_point_to_bin(sae->tmp->ec, K, k, NULL) < 0) {
641 wpa_hexdump_key(MSG_DEBUG, "SAE: k", k, sae->tmp->prime_len);
650 static int sae_derive_k_ffc(struct sae_data *sae, u8 *k)
666 if (crypto_bignum_exptmod(sae->tmp->pwe_ffc, sae->peer_commit_scalar,
667 sae->tmp->prime, K) < 0 ||
668 crypto_bignum_mulmod(K, sae->tmp->peer_commit_element_ffc,
669 sae->tmp->prime, K) < 0 ||
670 crypto_bignum_exptmod(K, sae->tmp->sae_rand, sae->tmp->prime, K) < 0
673 crypto_bignum_to_bin(K, k, SAE_MAX_PRIME_LEN, sae->tmp->prime_len) <
679 wpa_hexdump_key(MSG_DEBUG, "SAE: k", k, sae->tmp->prime_len);
688 static int sae_derive_keys(struct sae_data *sae, const u8 *k)
707 hmac_sha256(null_key, sizeof(null_key), k, sae->tmp->prime_len,
711 crypto_bignum_add(sae->tmp->own_commit_scalar, sae->peer_commit_scalar,
713 crypto_bignum_mod(tmp, sae->tmp->order, tmp);
720 crypto_bignum_to_bin(tmp, val, sizeof(val), sae->tmp->order_len);
723 val, sae->tmp->order_len, keys, sizeof(keys)) < 0)
726 os_memcpy(sae->tmp->kck, keys, SAE_KCK_LEN);
727 os_memcpy(sae->pmk, keys + SAE_KCK_LEN, SAE_PMK_LEN);
728 os_memcpy(sae->pmkid, val, SAE_PMKID_LEN);
730 wpa_hexdump_key(MSG_DEBUG, "SAE: KCK", sae->tmp->kck, SAE_KCK_LEN);
731 wpa_hexdump_key(MSG_DEBUG, "SAE: PMK", sae->pmk, SAE_PMK_LEN);
740 int sae_process_commit(struct sae_data *sae)
743 if (sae->tmp == NULL ||
744 (sae->tmp->ec && sae_derive_k_ecc(sae, k) < 0) ||
745 (sae->tmp->dh && sae_derive_k_ffc(sae, k) < 0) ||
746 sae_derive_keys(sae, k) < 0)
752 void sae_write_commit(struct sae_data *sae, struct wpabuf *buf,
757 if (sae->tmp == NULL)
760 wpabuf_put_le16(buf, sae->group); /* Finite Cyclic Group */
766 pos = wpabuf_put(buf, sae->tmp->prime_len);
767 crypto_bignum_to_bin(sae->tmp->own_commit_scalar, pos,
768 sae->tmp->prime_len, sae->tmp->prime_len);
770 pos, sae->tmp->prime_len);
771 if (sae->tmp->ec) {
772 pos = wpabuf_put(buf, 2 * sae->tmp->prime_len);
773 crypto_ec_point_to_bin(sae->tmp->ec,
774 sae->tmp->own_commit_element_ecc,
775 pos, pos + sae->tmp->prime_len);
777 pos, sae->tmp->prime_len);
779 pos + sae->tmp->prime_len, sae->tmp->prime_len);
781 pos = wpabuf_put(buf, sae->tmp->prime_len);
782 crypto_bignum_to_bin(sae->tmp->own_commit_element_ffc, pos,
783 sae->tmp->prime_len, sae->tmp->prime_len);
785 pos, sae->tmp->prime_len);
800 u16 sae_group_allowed(struct sae_data *sae, int *allowed_groups, u16 group)
816 if (sae->state == SAE_COMMITTED && group != sae->group) {
821 if (group != sae->group && sae_set_group(sae, group) < 0) {
827 if (sae->tmp == NULL) {
832 if (sae->tmp->dh && !allowed_groups) {
852 static void sae_parse_commit_token(struct sae_data *sae, const u8 **pos,
864 scalar_elem_len = (sae->tmp->ec ? 3 : 2) * sae->tmp->prime_len;
909 static u16 sae_parse_commit_scalar(struct sae_data *sae, const u8 **pos,
914 if (sae->tmp->prime_len > end - *pos) {
919 peer_scalar = crypto_bignum_init_set(*pos, sae->tmp->prime_len);
929 if (sae->state == SAE_ACCEPTED && sae->peer_commit_scalar &&
930 crypto_bignum_cmp(sae->peer_commit_scalar, peer_scalar) == 0) {
940 crypto_bignum_cmp(peer_scalar, sae->tmp->order) >= 0) {
947 crypto_bignum_deinit(sae->peer_commit_scalar, 0);
948 sae->peer_commit_scalar = peer_scalar;
950 *pos, sae->tmp->prime_len);
951 *pos += sae->tmp->prime_len;
957 static u16 sae_parse_commit_element_ecc(struct sae_data *sae, const u8 **pos,
962 if (2 * sae->tmp->prime_len > end - *pos) {
968 if (crypto_bignum_to_bin(sae->tmp->prime, prime, sizeof(prime),
969 sae->tmp->prime_len) < 0)
973 if (os_memcmp(*pos, prime, sae->tmp->prime_len) >= 0 ||
974 os_memcmp(*pos + sae->tmp->prime_len, prime,
975 sae->tmp->prime_len) >= 0) {
982 *pos, sae->tmp->prime_len);
984 *pos + sae->tmp->prime_len, sae->tmp->prime_len);
986 crypto_ec_point_deinit(sae->tmp->peer_commit_element_ecc, 0);
987 sae->tmp->peer_commit_element_ecc =
988 crypto_ec_point_from_bin(sae->tmp->ec, *pos);
989 if (sae->tmp->peer_commit_element_ecc == NULL)
992 if (!crypto_ec_point_is_on_curve(sae->tmp->ec,
993 sae->tmp->peer_commit_element_ecc)) {
998 *pos += 2 * sae->tmp->prime_len;
1004 static u16 sae_parse_commit_element_ffc(struct sae_data *sae, const u8 **pos,
1010 if (sae->tmp->prime_len > end - *pos) {
1016 sae->tmp->prime_len);
1018 crypto_bignum_deinit(sae->tmp->peer_commit_element_ffc, 0);
1019 sae->tmp->peer_commit_element_ffc =
1020 crypto_bignum_init_set(*pos, sae->tmp->prime_len);
1021 if (sae->tmp->peer_commit_element_ffc == NULL)
1027 crypto_bignum_sub(sae->tmp->prime, one, res) ||
1028 crypto_bignum_is_zero(sae->tmp->peer_commit_element_ffc) ||
1029 crypto_bignum_is_one(sae->tmp->peer_commit_element_ffc) ||
1030 crypto_bignum_cmp(sae->tmp->peer_commit_element_ffc, res) >= 0) {
1039 if (crypto_bignum_exptmod(sae->tmp->peer_commit_element_ffc,
1040 sae->tmp->order, sae->tmp->prime, res) < 0 ||
1048 *pos += sae->tmp->prime_len;
1054 static u16 sae_parse_commit_element(struct sae_data *sae, const u8 **pos,
1057 if (sae->tmp->dh)
1058 return sae_parse_commit_element_ffc(sae, pos, end);
1059 return sae_parse_commit_element_ecc(sae, pos, end);
1063 static int sae_parse_password_identifier(struct sae_data *sae,
1069 if (sae->tmp->pw_id) {
1072 sae->tmp->pw_id);
1075 os_free(sae->tmp->pw_id);
1076 sae->tmp->pw_id = NULL;
1080 if (sae->tmp->pw_id &&
1081 (pos[1] - 1 != (int) os_strlen(sae->tmp->pw_id) ||
1082 os_memcmp(sae->tmp->pw_id, pos + 3, pos[1] - 1) != 0)) {
1085 sae->tmp->pw_id);
1089 os_free(sae->tmp->pw_id);
1090 sae->tmp->pw_id = os_malloc(pos[1]);
1091 if (!sae->tmp->pw_id)
1093 os_memcpy(sae->tmp->pw_id, pos + 3, pos[1] - 1);
1094 sae->tmp->pw_id[pos[1] - 1] = '\0';
1096 sae->tmp->pw_id, pos[1] - 1);
1101 u16 sae_parse_commit(struct sae_data *sae, const u8 *data, size_t len,
1110 res = sae_group_allowed(sae, allowed_groups, WPA_GET_LE16(pos));
1116 sae_parse_commit_token(sae, &pos, end, token, token_len);
1119 res = sae_parse_commit_scalar(sae, &pos, end);
1124 res = sae_parse_commit_element(sae, &pos, end);
1129 res = sae_parse_password_identifier(sae, pos, end);
1137 if (!sae->tmp->own_commit_scalar ||
1138 crypto_bignum_cmp(sae->tmp->own_commit_scalar,
1139 sae->peer_commit_scalar) != 0 ||
1140 (sae->tmp->dh &&
1141 (!sae->tmp->own_commit_element_ffc ||
1142 crypto_bignum_cmp(sae->tmp->own_commit_element_ffc,
1143 sae->tmp->peer_commit_element_ffc) != 0)) ||
1144 (sae->tmp->ec &&
1145 (!sae->tmp->own_commit_element_ecc ||
1146 crypto_ec_point_cmp(sae->tmp->ec,
1147 sae->tmp->own_commit_element_ecc,
1148 sae->tmp->peer_commit_element_ecc) != 0)))
1160 static void sae_cn_confirm(struct sae_data *sae, const u8 *sc,
1182 sae->tmp->prime_len);
1184 len[1] = sae->tmp->prime_len;
1188 sae->tmp->prime_len);
1190 len[3] = sae->tmp->prime_len;
1193 hmac_sha256_vector(sae->tmp->kck, sizeof(sae->tmp->kck), 5, addr, len,
1198 static void sae_cn_confirm_ecc(struct sae_data *sae, const u8 *sc,
1208 crypto_ec_point_to_bin(sae->tmp->ec, element1, element_b1,
1209 element_b1 + sae->tmp->prime_len);
1210 crypto_ec_point_to_bin(sae->tmp->ec, element2, element_b2,
1211 element_b2 + sae->tmp->prime_len);
1213 sae_cn_confirm(sae, sc, scalar1, element_b1, 2 * sae->tmp->prime_len,
1214 scalar2, element_b2, 2 * sae->tmp->prime_len, confirm);
1218 static void sae_cn_confirm_ffc(struct sae_data *sae, const u8 *sc,
1229 sae->tmp->prime_len);
1231 sae->tmp->prime_len);
1233 sae_cn_confirm(sae, sc, scalar1, element_b1, sae->tmp->prime_len,
1234 scalar2, element_b2, sae->tmp->prime_len, confirm);
1238 void sae_write_confirm(struct sae_data *sae, struct wpabuf *buf)
1242 if (sae->tmp == NULL)
1247 wpabuf_put_le16(buf, sae->send_confirm);
1248 if (sae->send_confirm < 0xffff)
1249 sae->send_confirm++;
1251 if (sae->tmp->ec)
1252 sae_cn_confirm_ecc(sae, sc, sae->tmp->own_commit_scalar,
1253 sae->tmp->own_commit_element_ecc,
1254 sae->peer_commit_scalar,
1255 sae->tmp->peer_commit_element_ecc,
1258 sae_cn_confirm_ffc(sae, sc, sae->tmp->own_commit_scalar,
1259 sae->tmp->own_commit_element_ffc,
1260 sae->peer_commit_scalar,
1261 sae->tmp->peer_commit_element_ffc,
1266 int sae_check_confirm(struct sae_data *sae, const u8 *data, size_t len)
1277 if (!sae->tmp || !sae->peer_commit_scalar ||
1278 !sae->tmp->own_commit_scalar) {
1283 if (sae->tmp->ec) {
1284 if (!sae->tmp->peer_commit_element_ecc ||
1285 !sae->tmp->own_commit_element_ecc)
1287 sae_cn_confirm_ecc(sae, data, sae->peer_commit_scalar,
1288 sae->tmp->peer_commit_element_ecc,
1289 sae->tmp->own_commit_scalar,
1290 sae->tmp->own_commit_element_ecc,
1293 if (!sae->tmp->peer_commit_element_ffc ||
1294 !sae->tmp->own_commit_element_ffc)
1296 sae_cn_confirm_ffc(sae, data, sae->peer_commit_scalar,
1297 sae->tmp->peer_commit_element_ffc,
1298 sae->tmp->own_commit_scalar,
1299 sae->tmp->own_commit_element_ffc,