Lines Matching defs: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,
441 static int sae_derive_pwe_ffc(struct sae_data *sae, const u8 *addr1,
454 size_t prime_len = sae->tmp->prime_len * 8;
457 crypto_bignum_deinit(sae->tmp->pwe_ffc, 1);
458 sae->tmp->pwe_ffc = NULL;
489 k = dragonfly_min_pwe_loop_iter(sae->group);
505 res = sae_test_pwd_seed_ffc(sae, pwd_seed, pwe);
527 sae->tmp->pwe_ffc = crypto_bignum_init_set(pwe_buf, prime_len);
531 return sae->tmp->pwe_ffc ? 0 : -1;
535 static int sae_derive_commit_element_ecc(struct sae_data *sae,
539 if (!sae->tmp->own_commit_element_ecc) {
540 sae->tmp->own_commit_element_ecc =
541 crypto_ec_point_init(sae->tmp->ec);
542 if (!sae->tmp->own_commit_element_ecc)
546 if (crypto_ec_point_mul(sae->tmp->ec, sae->tmp->pwe_ecc, mask,
547 sae->tmp->own_commit_element_ecc) < 0 ||
548 crypto_ec_point_invert(sae->tmp->ec,
549 sae->tmp->own_commit_element_ecc) < 0) {
558 static int sae_derive_commit_element_ffc(struct sae_data *sae,
562 if (!sae->tmp->own_commit_element_ffc) {
563 sae->tmp->own_commit_element_ffc = crypto_bignum_init();
564 if (!sae->tmp->own_commit_element_ffc)
568 if (crypto_bignum_exptmod(sae->tmp->pwe_ffc, mask, sae->tmp->prime,
569 sae->tmp->own_commit_element_ffc) < 0 ||
570 crypto_bignum_inverse(sae->tmp->own_commit_element_ffc,
571 sae->tmp->prime,
572 sae->tmp->own_commit_element_ffc) < 0) {
581 static int sae_derive_commit(struct sae_data *sae)
587 if (!sae->tmp->sae_rand)
588 sae->tmp->sae_rand = crypto_bignum_init();
589 if (!sae->tmp->own_commit_scalar)
590 sae->tmp->own_commit_scalar = crypto_bignum_init();
591 ret = !mask || !sae->tmp->sae_rand || !sae->tmp->own_commit_scalar ||
592 dragonfly_generate_scalar(sae->tmp->order, sae->tmp->sae_rand,
594 sae->tmp->own_commit_scalar) < 0 ||
595 (sae->tmp->ec &&
596 sae_derive_commit_element_ecc(sae, mask) < 0) ||
597 (sae->tmp->dh &&
598 sae_derive_commit_element_ffc(sae, mask) < 0);
606 const char *identifier, struct sae_data *sae)
608 if (sae->tmp == NULL ||
609 (sae->tmp->ec && sae_derive_pwe_ecc(sae, addr1, addr2, password,
612 (sae->tmp->dh && sae_derive_pwe_ffc(sae, addr1, addr2, password,
615 sae_derive_commit(sae) < 0)
621 static int sae_derive_k_ecc(struct sae_data *sae, u8 *k)
626 K = crypto_ec_point_init(sae->tmp->ec);
637 if (crypto_ec_point_mul(sae->tmp->ec, sae->tmp->pwe_ecc,
638 sae->peer_commit_scalar, K) < 0 ||
639 crypto_ec_point_add(sae->tmp->ec, K,
640 sae->tmp->peer_commit_element_ecc, K) < 0 ||
641 crypto_ec_point_mul(sae->tmp->ec, K, sae->tmp->sae_rand, K) < 0 ||
642 crypto_ec_point_is_at_infinity(sae->tmp->ec, K) ||
643 crypto_ec_point_to_bin(sae->tmp->ec, K, k, NULL) < 0) {
648 wpa_hexdump_key(MSG_DEBUG, "SAE: k", k, sae->tmp->prime_len);
657 static int sae_derive_k_ffc(struct sae_data *sae, u8 *k)
673 if (crypto_bignum_exptmod(sae->tmp->pwe_ffc, sae->peer_commit_scalar,
674 sae->tmp->prime, K) < 0 ||
675 crypto_bignum_mulmod(K, sae->tmp->peer_commit_element_ffc,
676 sae->tmp->prime, K) < 0 ||
677 crypto_bignum_exptmod(K, sae->tmp->sae_rand, sae->tmp->prime, K) < 0
680 crypto_bignum_to_bin(K, k, SAE_MAX_PRIME_LEN, sae->tmp->prime_len) <
686 wpa_hexdump_key(MSG_DEBUG, "SAE: k", k, sae->tmp->prime_len);
695 static int sae_derive_keys(struct sae_data *sae, const u8 *k)
714 hmac_sha256(null_key, sizeof(null_key), k, sae->tmp->prime_len,
718 crypto_bignum_add(sae->tmp->own_commit_scalar, sae->peer_commit_scalar,
720 crypto_bignum_mod(tmp, sae->tmp->order, tmp);
727 crypto_bignum_to_bin(tmp, val, sizeof(val), sae->tmp->order_len);
730 val, sae->tmp->order_len, keys, sizeof(keys)) < 0)
733 os_memcpy(sae->tmp->kck, keys, SAE_KCK_LEN);
734 os_memcpy(sae->pmk, keys + SAE_KCK_LEN, SAE_PMK_LEN);
735 os_memcpy(sae->pmkid, val, SAE_PMKID_LEN);
737 wpa_hexdump_key(MSG_DEBUG, "SAE: KCK", sae->tmp->kck, SAE_KCK_LEN);
738 wpa_hexdump_key(MSG_DEBUG, "SAE: PMK", sae->pmk, SAE_PMK_LEN);
747 int sae_process_commit(struct sae_data *sae)
750 if (sae->tmp == NULL ||
751 (sae->tmp->ec && sae_derive_k_ecc(sae, k) < 0) ||
752 (sae->tmp->dh && sae_derive_k_ffc(sae, k) < 0) ||
753 sae_derive_keys(sae, k) < 0)
759 void sae_write_commit(struct sae_data *sae, struct wpabuf *buf,
764 if (sae->tmp == NULL)
767 wpabuf_put_le16(buf, sae->group); /* Finite Cyclic Group */
773 pos = wpabuf_put(buf, sae->tmp->prime_len);
774 crypto_bignum_to_bin(sae->tmp->own_commit_scalar, pos,
775 sae->tmp->prime_len, sae->tmp->prime_len);
777 pos, sae->tmp->prime_len);
778 if (sae->tmp->ec) {
779 pos = wpabuf_put(buf, 2 * sae->tmp->prime_len);
780 crypto_ec_point_to_bin(sae->tmp->ec,
781 sae->tmp->own_commit_element_ecc,
782 pos, pos + sae->tmp->prime_len);
784 pos, sae->tmp->prime_len);
786 pos + sae->tmp->prime_len, sae->tmp->prime_len);
788 pos = wpabuf_put(buf, sae->tmp->prime_len);
789 crypto_bignum_to_bin(sae->tmp->own_commit_element_ffc, pos,
790 sae->tmp->prime_len, sae->tmp->prime_len);
792 pos, sae->tmp->prime_len);
807 u16 sae_group_allowed(struct sae_data *sae, int *allowed_groups, u16 group)
823 if (sae->state == SAE_COMMITTED && group != sae->group) {
828 if (group != sae->group && sae_set_group(sae, group) < 0) {
834 if (sae->tmp == NULL) {
839 if (sae->tmp->dh && !allowed_groups) {
859 static void sae_parse_commit_token(struct sae_data *sae, const u8 **pos,
871 scalar_elem_len = (sae->tmp->ec ? 3 : 2) * sae->tmp->prime_len;
916 static u16 sae_parse_commit_scalar(struct sae_data *sae, const u8 **pos,
921 if (sae->tmp->prime_len > end - *pos) {
926 peer_scalar = crypto_bignum_init_set(*pos, sae->tmp->prime_len);
936 if (sae->state == SAE_ACCEPTED && sae->peer_commit_scalar &&
937 crypto_bignum_cmp(sae->peer_commit_scalar, peer_scalar) == 0) {
947 crypto_bignum_cmp(peer_scalar, sae->tmp->order) >= 0) {
954 crypto_bignum_deinit(sae->peer_commit_scalar, 0);
955 sae->peer_commit_scalar = peer_scalar;
957 *pos, sae->tmp->prime_len);
958 *pos += sae->tmp->prime_len;
964 static u16 sae_parse_commit_element_ecc(struct sae_data *sae, const u8 **pos,
969 if (2 * sae->tmp->prime_len > end - *pos) {
975 if (crypto_bignum_to_bin(sae->tmp->prime, prime, sizeof(prime),
976 sae->tmp->prime_len) < 0)
980 if (os_memcmp(*pos, prime, sae->tmp->prime_len) >= 0 ||
981 os_memcmp(*pos + sae->tmp->prime_len, prime,
982 sae->tmp->prime_len) >= 0) {
989 *pos, sae->tmp->prime_len);
991 *pos + sae->tmp->prime_len, sae->tmp->prime_len);
993 crypto_ec_point_deinit(sae->tmp->peer_commit_element_ecc, 0);
994 sae->tmp->peer_commit_element_ecc =
995 crypto_ec_point_from_bin(sae->tmp->ec, *pos);
996 if (sae->tmp->peer_commit_element_ecc == NULL)
999 if (!crypto_ec_point_is_on_curve(sae->tmp->ec,
1000 sae->tmp->peer_commit_element_ecc)) {
1005 *pos += 2 * sae->tmp->prime_len;
1011 static u16 sae_parse_commit_element_ffc(struct sae_data *sae, const u8 **pos,
1017 if (sae->tmp->prime_len > end - *pos) {
1023 sae->tmp->prime_len);
1025 crypto_bignum_deinit(sae->tmp->peer_commit_element_ffc, 0);
1026 sae->tmp->peer_commit_element_ffc =
1027 crypto_bignum_init_set(*pos, sae->tmp->prime_len);
1028 if (sae->tmp->peer_commit_element_ffc == NULL)
1034 crypto_bignum_sub(sae->tmp->prime, one, res) ||
1035 crypto_bignum_is_zero(sae->tmp->peer_commit_element_ffc) ||
1036 crypto_bignum_is_one(sae->tmp->peer_commit_element_ffc) ||
1037 crypto_bignum_cmp(sae->tmp->peer_commit_element_ffc, res) >= 0) {
1046 if (crypto_bignum_exptmod(sae->tmp->peer_commit_element_ffc,
1047 sae->tmp->order, sae->tmp->prime, res) < 0 ||
1055 *pos += sae->tmp->prime_len;
1061 static u16 sae_parse_commit_element(struct sae_data *sae, const u8 **pos,
1064 if (sae->tmp->dh)
1065 return sae_parse_commit_element_ffc(sae, pos, end);
1066 return sae_parse_commit_element_ecc(sae, pos, end);
1070 static int sae_parse_password_identifier(struct sae_data *sae,
1076 if (sae->tmp->pw_id) {
1079 sae->tmp->pw_id);
1082 os_free(sae->tmp->pw_id);
1083 sae->tmp->pw_id = NULL;
1087 if (sae->tmp->pw_id &&
1088 (pos[1] - 1 != (int) os_strlen(sae->tmp->pw_id) ||
1089 os_memcmp(sae->tmp->pw_id, pos + 3, pos[1] - 1) != 0)) {
1092 sae->tmp->pw_id);
1096 os_free(sae->tmp->pw_id);
1097 sae->tmp->pw_id = os_malloc(pos[1]);
1098 if (!sae->tmp->pw_id)
1100 os_memcpy(sae->tmp->pw_id, pos + 3, pos[1] - 1);
1101 sae->tmp->pw_id[pos[1] - 1] = '\0';
1103 sae->tmp->pw_id, pos[1] - 1);
1108 u16 sae_parse_commit(struct sae_data *sae, const u8 *data, size_t len,
1117 res = sae_group_allowed(sae, allowed_groups, WPA_GET_LE16(pos));
1123 sae_parse_commit_token(sae, &pos, end, token, token_len);
1126 res = sae_parse_commit_scalar(sae, &pos, end);
1131 res = sae_parse_commit_element(sae, &pos, end);
1136 res = sae_parse_password_identifier(sae, pos, end);
1144 if (!sae->tmp->own_commit_scalar ||
1145 crypto_bignum_cmp(sae->tmp->own_commit_scalar,
1146 sae->peer_commit_scalar) != 0 ||
1147 (sae->tmp->dh &&
1148 (!sae->tmp->own_commit_element_ffc ||
1149 crypto_bignum_cmp(sae->tmp->own_commit_element_ffc,
1150 sae->tmp->peer_commit_element_ffc) != 0)) ||
1151 (sae->tmp->ec &&
1152 (!sae->tmp->own_commit_element_ecc ||
1153 crypto_ec_point_cmp(sae->tmp->ec,
1154 sae->tmp->own_commit_element_ecc,
1155 sae->tmp->peer_commit_element_ecc) != 0)))
1167 static void sae_cn_confirm(struct sae_data *sae, const u8 *sc,
1189 sae->tmp->prime_len);
1191 len[1] = sae->tmp->prime_len;
1195 sae->tmp->prime_len);
1197 len[3] = sae->tmp->prime_len;
1200 hmac_sha256_vector(sae->tmp->kck, sizeof(sae->tmp->kck), 5, addr, len,
1205 static void sae_cn_confirm_ecc(struct sae_data *sae, const u8 *sc,
1215 crypto_ec_point_to_bin(sae->tmp->ec, element1, element_b1,
1216 element_b1 + sae->tmp->prime_len);
1217 crypto_ec_point_to_bin(sae->tmp->ec, element2, element_b2,
1218 element_b2 + sae->tmp->prime_len);
1220 sae_cn_confirm(sae, sc, scalar1, element_b1, 2 * sae->tmp->prime_len,
1221 scalar2, element_b2, 2 * sae->tmp->prime_len, confirm);
1225 static void sae_cn_confirm_ffc(struct sae_data *sae, const u8 *sc,
1236 sae->tmp->prime_len);
1238 sae->tmp->prime_len);
1240 sae_cn_confirm(sae, sc, scalar1, element_b1, sae->tmp->prime_len,
1241 scalar2, element_b2, sae->tmp->prime_len, confirm);
1245 void sae_write_confirm(struct sae_data *sae, struct wpabuf *buf)
1249 if (sae->tmp == NULL)
1254 wpabuf_put_le16(buf, sae->send_confirm);
1255 if (sae->send_confirm < 0xffff)
1256 sae->send_confirm++;
1258 if (sae->tmp->ec)
1259 sae_cn_confirm_ecc(sae, sc, sae->tmp->own_commit_scalar,
1260 sae->tmp->own_commit_element_ecc,
1261 sae->peer_commit_scalar,
1262 sae->tmp->peer_commit_element_ecc,
1265 sae_cn_confirm_ffc(sae, sc, sae->tmp->own_commit_scalar,
1266 sae->tmp->own_commit_element_ffc,
1267 sae->peer_commit_scalar,
1268 sae->tmp->peer_commit_element_ffc,
1273 int sae_check_confirm(struct sae_data *sae, const u8 *data, size_t len)
1284 if (!sae->tmp || !sae->peer_commit_scalar ||
1285 !sae->tmp->own_commit_scalar) {
1290 if (sae->tmp->ec) {
1291 if (!sae->tmp->peer_commit_element_ecc ||
1292 !sae->tmp->own_commit_element_ecc)
1294 sae_cn_confirm_ecc(sae, data, sae->peer_commit_scalar,
1295 sae->tmp->peer_commit_element_ecc,
1296 sae->tmp->own_commit_scalar,
1297 sae->tmp->own_commit_element_ecc,
1300 if (!sae->tmp->peer_commit_element_ffc ||
1301 !sae->tmp->own_commit_element_ffc)
1303 sae_cn_confirm_ffc(sae, data, sae->peer_commit_scalar,
1304 sae->tmp->peer_commit_element_ffc,
1305 sae->tmp->own_commit_scalar,
1306 sae->tmp->own_commit_element_ffc,