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,
308 prime_len = sae->tmp->prime_len;
309 if (crypto_bignum_to_bin(sae->tmp->prime, prime, sizeof(prime),
317 if (dragonfly_get_random_qr_qnr(sae->tmp->prime, &qr, &qnr) < 0 ||
353 k = dragonfly_min_pwe_loop_iter(sae->group);
371 res = sae_test_pwd_seed_ecc(sae, pwd_seed,
414 y = crypto_ec_point_compute_y_sqr(sae->tmp->ec, x);
416 dragonfly_sqrt(sae->tmp->ec, y, y) < 0 ||
419 crypto_bignum_sub(sae->tmp->prime, y, y) < 0 ||
431 crypto_ec_point_deinit(sae->tmp->pwe_ecc, 1);
432 sae->tmp->pwe_ecc = crypto_ec_point_from_bin(sae->tmp->ec, x_y);
433 if (!sae->tmp->pwe_ecc) {
453 static int sae_derive_pwe_ffc(struct sae_data *sae, const u8 *addr1,
466 size_t prime_len = sae->tmp->prime_len * 8;
469 crypto_bignum_deinit(sae->tmp->pwe_ffc, 1);
470 sae->tmp->pwe_ffc = NULL;
501 k = dragonfly_min_pwe_loop_iter(sae->group);
517 res = sae_test_pwd_seed_ffc(sae, pwd_seed, pwe);
539 sae->tmp->pwe_ffc = crypto_bignum_init_set(pwe_buf, prime_len);
543 return sae->tmp->pwe_ffc ? 0 : -1;
547 static int sae_derive_commit_element_ecc(struct sae_data *sae,
551 if (!sae->tmp->own_commit_element_ecc) {
552 sae->tmp->own_commit_element_ecc =
553 crypto_ec_point_init(sae->tmp->ec);
554 if (!sae->tmp->own_commit_element_ecc)
558 if (crypto_ec_point_mul(sae->tmp->ec, sae->tmp->pwe_ecc, mask,
559 sae->tmp->own_commit_element_ecc) < 0 ||
560 crypto_ec_point_invert(sae->tmp->ec,
561 sae->tmp->own_commit_element_ecc) < 0) {
570 static int sae_derive_commit_element_ffc(struct sae_data *sae,
574 if (!sae->tmp->own_commit_element_ffc) {
575 sae->tmp->own_commit_element_ffc = crypto_bignum_init();
576 if (!sae->tmp->own_commit_element_ffc)
580 if (crypto_bignum_exptmod(sae->tmp->pwe_ffc, mask, sae->tmp->prime,
581 sae->tmp->own_commit_element_ffc) < 0 ||
582 crypto_bignum_inverse(sae->tmp->own_commit_element_ffc,
583 sae->tmp->prime,
584 sae->tmp->own_commit_element_ffc) < 0) {
593 static int sae_derive_commit(struct sae_data *sae)
599 if (!sae->tmp->sae_rand)
600 sae->tmp->sae_rand = crypto_bignum_init();
601 if (!sae->tmp->own_commit_scalar)
602 sae->tmp->own_commit_scalar = crypto_bignum_init();
603 ret = !mask || !sae->tmp->sae_rand || !sae->tmp->own_commit_scalar ||
604 dragonfly_generate_scalar(sae->tmp->order, sae->tmp->sae_rand,
606 sae->tmp->own_commit_scalar) < 0 ||
607 (sae->tmp->ec &&
608 sae_derive_commit_element_ecc(sae, mask) < 0) ||
609 (sae->tmp->dh &&
610 sae_derive_commit_element_ffc(sae, mask) < 0);
618 const char *identifier, struct sae_data *sae)
620 if (sae->tmp == NULL ||
621 (sae->tmp->ec && sae_derive_pwe_ecc(sae, addr1, addr2, password,
624 (sae->tmp->dh && sae_derive_pwe_ffc(sae, addr1, addr2, password,
627 sae_derive_commit(sae) < 0)
633 static int sae_derive_k_ecc(struct sae_data *sae, u8 *k)
638 K = crypto_ec_point_init(sae->tmp->ec);
649 if (crypto_ec_point_mul(sae->tmp->ec, sae->tmp->pwe_ecc,
650 sae->peer_commit_scalar, K) < 0 ||
651 crypto_ec_point_add(sae->tmp->ec, K,
652 sae->tmp->peer_commit_element_ecc, K) < 0 ||
653 crypto_ec_point_mul(sae->tmp->ec, K, sae->tmp->sae_rand, K) < 0 ||
654 crypto_ec_point_is_at_infinity(sae->tmp->ec, K) ||
655 crypto_ec_point_to_bin(sae->tmp->ec, K, k, NULL) < 0) {
660 wpa_hexdump_key(MSG_DEBUG, "SAE: k", k, sae->tmp->prime_len);
669 static int sae_derive_k_ffc(struct sae_data *sae, u8 *k)
685 if (crypto_bignum_exptmod(sae->tmp->pwe_ffc, sae->peer_commit_scalar,
686 sae->tmp->prime, K) < 0 ||
687 crypto_bignum_mulmod(K, sae->tmp->peer_commit_element_ffc,
688 sae->tmp->prime, K) < 0 ||
689 crypto_bignum_exptmod(K, sae->tmp->sae_rand, sae->tmp->prime, K) < 0
692 crypto_bignum_to_bin(K, k, SAE_MAX_PRIME_LEN, sae->tmp->prime_len) <
698 wpa_hexdump_key(MSG_DEBUG, "SAE: k", k, sae->tmp->prime_len);
707 static int sae_derive_keys(struct sae_data *sae, const u8 *k)
726 hmac_sha256(null_key, sizeof(null_key), k, sae->tmp->prime_len,
730 crypto_bignum_add(sae->tmp->own_commit_scalar, sae->peer_commit_scalar,
732 crypto_bignum_mod(tmp, sae->tmp->order, tmp);
739 crypto_bignum_to_bin(tmp, val, sizeof(val), sae->tmp->order_len);
742 val, sae->tmp->order_len, keys, sizeof(keys)) < 0)
745 os_memcpy(sae->tmp->kck, keys, SAE_KCK_LEN);
746 os_memcpy(sae->pmk, keys + SAE_KCK_LEN, SAE_PMK_LEN);
747 os_memcpy(sae->pmkid, val, SAE_PMKID_LEN);
749 wpa_hexdump_key(MSG_DEBUG, "SAE: KCK", sae->tmp->kck, SAE_KCK_LEN);
750 wpa_hexdump_key(MSG_DEBUG, "SAE: PMK", sae->pmk, SAE_PMK_LEN);
759 int sae_process_commit(struct sae_data *sae)
762 if (sae->tmp == NULL ||
763 (sae->tmp->ec && sae_derive_k_ecc(sae, k) < 0) ||
764 (sae->tmp->dh && sae_derive_k_ffc(sae, k) < 0) ||
765 sae_derive_keys(sae, k) < 0)
771 void sae_write_commit(struct sae_data *sae, struct wpabuf *buf,
776 if (sae->tmp == NULL)
779 wpabuf_put_le16(buf, sae->group); /* Finite Cyclic Group */
785 pos = wpabuf_put(buf, sae->tmp->prime_len);
786 crypto_bignum_to_bin(sae->tmp->own_commit_scalar, pos,
787 sae->tmp->prime_len, sae->tmp->prime_len);
789 pos, sae->tmp->prime_len);
790 if (sae->tmp->ec) {
791 pos = wpabuf_put(buf, 2 * sae->tmp->prime_len);
792 crypto_ec_point_to_bin(sae->tmp->ec,
793 sae->tmp->own_commit_element_ecc,
794 pos, pos + sae->tmp->prime_len);
796 pos, sae->tmp->prime_len);
798 pos + sae->tmp->prime_len, sae->tmp->prime_len);
800 pos = wpabuf_put(buf, sae->tmp->prime_len);
801 crypto_bignum_to_bin(sae->tmp->own_commit_element_ffc, pos,
802 sae->tmp->prime_len, sae->tmp->prime_len);
804 pos, sae->tmp->prime_len);
819 u16 sae_group_allowed(struct sae_data *sae, int *allowed_groups, u16 group)
835 if (sae->state == SAE_COMMITTED && group != sae->group) {
840 if (group != sae->group && sae_set_group(sae, group) < 0) {
846 if (sae->tmp == NULL) {
851 if (sae->tmp->dh && !allowed_groups) {
871 static void sae_parse_commit_token(struct sae_data *sae, const u8 **pos,
883 scalar_elem_len = (sae->tmp->ec ? 3 : 2) * sae->tmp->prime_len;
928 static u16 sae_parse_commit_scalar(struct sae_data *sae, const u8 **pos,
933 if (sae->tmp->prime_len > end - *pos) {
938 peer_scalar = crypto_bignum_init_set(*pos, sae->tmp->prime_len);
948 if (sae->state == SAE_ACCEPTED && sae->peer_commit_scalar &&
949 crypto_bignum_cmp(sae->peer_commit_scalar, peer_scalar) == 0) {
959 crypto_bignum_cmp(peer_scalar, sae->tmp->order) >= 0) {
966 crypto_bignum_deinit(sae->peer_commit_scalar, 0);
967 sae->peer_commit_scalar = peer_scalar;
969 *pos, sae->tmp->prime_len);
970 *pos += sae->tmp->prime_len;
976 static u16 sae_parse_commit_element_ecc(struct sae_data *sae, const u8 **pos,
981 if (2 * sae->tmp->prime_len > end - *pos) {
987 if (crypto_bignum_to_bin(sae->tmp->prime, prime, sizeof(prime),
988 sae->tmp->prime_len) < 0)
992 if (os_memcmp(*pos, prime, sae->tmp->prime_len) >= 0 ||
993 os_memcmp(*pos + sae->tmp->prime_len, prime,
994 sae->tmp->prime_len) >= 0) {
1001 *pos, sae->tmp->prime_len);
1003 *pos + sae->tmp->prime_len, sae->tmp->prime_len);
1005 crypto_ec_point_deinit(sae->tmp->peer_commit_element_ecc, 0);
1006 sae->tmp->peer_commit_element_ecc =
1007 crypto_ec_point_from_bin(sae->tmp->ec, *pos);
1008 if (sae->tmp->peer_commit_element_ecc == NULL)
1011 if (!crypto_ec_point_is_on_curve(sae->tmp->ec,
1012 sae->tmp->peer_commit_element_ecc)) {
1017 *pos += 2 * sae->tmp->prime_len;
1023 static u16 sae_parse_commit_element_ffc(struct sae_data *sae, const u8 **pos,
1029 if (sae->tmp->prime_len > end - *pos) {
1035 sae->tmp->prime_len);
1037 crypto_bignum_deinit(sae->tmp->peer_commit_element_ffc, 0);
1038 sae->tmp->peer_commit_element_ffc =
1039 crypto_bignum_init_set(*pos, sae->tmp->prime_len);
1040 if (sae->tmp->peer_commit_element_ffc == NULL)
1046 crypto_bignum_sub(sae->tmp->prime, one, res) ||
1047 crypto_bignum_is_zero(sae->tmp->peer_commit_element_ffc) ||
1048 crypto_bignum_is_one(sae->tmp->peer_commit_element_ffc) ||
1049 crypto_bignum_cmp(sae->tmp->peer_commit_element_ffc, res) >= 0) {
1058 if (crypto_bignum_exptmod(sae->tmp->peer_commit_element_ffc,
1059 sae->tmp->order, sae->tmp->prime, res) < 0 ||
1067 *pos += sae->tmp->prime_len;
1073 static u16 sae_parse_commit_element(struct sae_data *sae, const u8 **pos,
1076 if (sae->tmp->dh)
1077 return sae_parse_commit_element_ffc(sae, pos, end);
1078 return sae_parse_commit_element_ecc(sae, pos, end);
1082 static int sae_parse_password_identifier(struct sae_data *sae,
1088 if (sae->tmp->pw_id) {
1091 sae->tmp->pw_id);
1094 os_free(sae->tmp->pw_id);
1095 sae->tmp->pw_id = NULL;
1099 if (sae->tmp->pw_id &&
1100 (pos[1] - 1 != (int) os_strlen(sae->tmp->pw_id) ||
1101 os_memcmp(sae->tmp->pw_id, pos + 3, pos[1] - 1) != 0)) {
1104 sae->tmp->pw_id);
1108 os_free(sae->tmp->pw_id);
1109 sae->tmp->pw_id = os_malloc(pos[1]);
1110 if (!sae->tmp->pw_id)
1112 os_memcpy(sae->tmp->pw_id, pos + 3, pos[1] - 1);
1113 sae->tmp->pw_id[pos[1] - 1] = '\0';
1115 sae->tmp->pw_id, pos[1] - 1);
1120 u16 sae_parse_commit(struct sae_data *sae, const u8 *data, size_t len,
1129 res = sae_group_allowed(sae, allowed_groups, WPA_GET_LE16(pos));
1135 sae_parse_commit_token(sae, &pos, end, token, token_len);
1138 res = sae_parse_commit_scalar(sae, &pos, end);
1143 res = sae_parse_commit_element(sae, &pos, end);
1148 res = sae_parse_password_identifier(sae, pos, end);
1156 if (!sae->tmp->own_commit_scalar ||
1157 crypto_bignum_cmp(sae->tmp->own_commit_scalar,
1158 sae->peer_commit_scalar) != 0 ||
1159 (sae->tmp->dh &&
1160 (!sae->tmp->own_commit_element_ffc ||
1161 crypto_bignum_cmp(sae->tmp->own_commit_element_ffc,
1162 sae->tmp->peer_commit_element_ffc) != 0)) ||
1163 (sae->tmp->ec &&
1164 (!sae->tmp->own_commit_element_ecc ||
1165 crypto_ec_point_cmp(sae->tmp->ec,
1166 sae->tmp->own_commit_element_ecc,
1167 sae->tmp->peer_commit_element_ecc) != 0)))
1179 static void sae_cn_confirm(struct sae_data *sae, const u8 *sc,
1201 sae->tmp->prime_len);
1203 len[1] = sae->tmp->prime_len;
1207 sae->tmp->prime_len);
1209 len[3] = sae->tmp->prime_len;
1212 hmac_sha256_vector(sae->tmp->kck, sizeof(sae->tmp->kck), 5, addr, len,
1217 static void sae_cn_confirm_ecc(struct sae_data *sae, const u8 *sc,
1227 crypto_ec_point_to_bin(sae->tmp->ec, element1, element_b1,
1228 element_b1 + sae->tmp->prime_len);
1229 crypto_ec_point_to_bin(sae->tmp->ec, element2, element_b2,
1230 element_b2 + sae->tmp->prime_len);
1232 sae_cn_confirm(sae, sc, scalar1, element_b1, 2 * sae->tmp->prime_len,
1233 scalar2, element_b2, 2 * sae->tmp->prime_len, confirm);
1237 static void sae_cn_confirm_ffc(struct sae_data *sae, const u8 *sc,
1248 sae->tmp->prime_len);
1250 sae->tmp->prime_len);
1252 sae_cn_confirm(sae, sc, scalar1, element_b1, sae->tmp->prime_len,
1253 scalar2, element_b2, sae->tmp->prime_len, confirm);
1257 void sae_write_confirm(struct sae_data *sae, struct wpabuf *buf)
1261 if (sae->tmp == NULL)
1266 wpabuf_put_le16(buf, sae->send_confirm);
1267 if (sae->send_confirm < 0xffff)
1268 sae->send_confirm++;
1270 if (sae->tmp->ec)
1271 sae_cn_confirm_ecc(sae, sc, sae->tmp->own_commit_scalar,
1272 sae->tmp->own_commit_element_ecc,
1273 sae->peer_commit_scalar,
1274 sae->tmp->peer_commit_element_ecc,
1277 sae_cn_confirm_ffc(sae, sc, sae->tmp->own_commit_scalar,
1278 sae->tmp->own_commit_element_ffc,
1279 sae->peer_commit_scalar,
1280 sae->tmp->peer_commit_element_ffc,
1285 int sae_check_confirm(struct sae_data *sae, const u8 *data, size_t len)
1296 if (!sae->tmp || !sae->peer_commit_scalar ||
1297 !sae->tmp->own_commit_scalar) {
1302 if (sae->tmp->ec) {
1303 if (!sae->tmp->peer_commit_element_ecc ||
1304 !sae->tmp->own_commit_element_ecc)
1306 sae_cn_confirm_ecc(sae, data, sae->peer_commit_scalar,
1307 sae->tmp->peer_commit_element_ecc,
1308 sae->tmp->own_commit_scalar,
1309 sae->tmp->own_commit_element_ecc,
1312 if (!sae->tmp->peer_commit_element_ffc ||
1313 !sae->tmp->own_commit_element_ffc)
1315 sae_cn_confirm_ffc(sae, data, sae->peer_commit_scalar,
1316 sae->tmp->peer_commit_element_ffc,
1317 sae->tmp->own_commit_scalar,
1318 sae->tmp->own_commit_element_ffc,