2 * Simultaneous authentication of equals
3 * Copyright (c) 2012-2013, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
12 #define SAE_KCK_LEN 32
13 #define SAE_PMK_LEN 32
14 #define SAE_PMKID_LEN 16
15 #define SAE_KEYSEED_KEY_LEN 32
16 #define SAE_MAX_PRIME_LEN 512
17 #define SAE_MAX_ECC_PRIME_LEN 66
18 #define SAE_COMMIT_MAX_LEN (2 + 3 * SAE_MAX_PRIME_LEN)
19 #define SAE_CONFIRM_MAX_LEN (2 + SAE_MAX_PRIME_LEN)
21 struct sae_temporary_data {
23 struct crypto_bignum *own_commit_scalar;
24 struct crypto_bignum *own_commit_element_ffc;
25 struct crypto_ec_point *own_commit_element_ecc;
26 struct crypto_bignum *peer_commit_element_ffc;
27 struct crypto_ec_point *peer_commit_element_ecc;
28 struct crypto_ec_point *pwe_ecc;
29 struct crypto_bignum *pwe_ffc;
30 struct crypto_bignum *sae_rand;
33 const struct dh_group *dh;
34 const struct crypto_bignum *prime;
35 const struct crypto_bignum *order;
36 struct crypto_bignum *prime_buf;
37 struct crypto_bignum *order_buf;
41 enum { SAE_NOTHING, SAE_COMMITTED, SAE_CONFIRMED, SAE_ACCEPTED } state;
44 struct crypto_bignum *peer_commit_scalar;
46 struct sae_temporary_data *tmp;
49 int sae_set_group(struct sae_data *sae, int group);
50 void sae_clear_temp_data(struct sae_data *sae);
51 void sae_clear_data(struct sae_data *sae);
53 int sae_prepare_commit(const u8 *addr1, const u8 *addr2,
54 const u8 *password, size_t password_len,
55 struct sae_data *sae);
56 int sae_process_commit(struct sae_data *sae);
57 void sae_write_commit(struct sae_data *sae, struct wpabuf *buf,
58 const struct wpabuf *token);
59 u16 sae_parse_commit(struct sae_data *sae, const u8 *data, size_t len,
60 const u8 **token, size_t *token_len, int *allowed_groups);
61 void sae_write_confirm(struct sae_data *sae, struct wpabuf *buf);
62 int sae_check_confirm(struct sae_data *sae, const u8 *data, size_t len);