| /* |
| * Simultaneous authentication of equals |
| * Copyright (c) 2012-2013, Jouni Malinen <j@w1.fi> |
| * |
| * This software may be distributed under the terms of the BSD license. |
| * See README for more details. |
| */ |
| |
| #ifndef SAE_H |
| #define SAE_H |
| |
| #define SAE_KCK_LEN 32 |
| #define SAE_PMK_LEN 32 |
| #define SAE_PMKID_LEN 16 |
| #define SAE_MAX_PRIME_LEN 512 |
| #define SAE_MAX_ECC_PRIME_LEN 66 |
| #define SAE_MAX_HASH_LEN 64 |
| #define SAE_COMMIT_MAX_LEN (2 + 3 * SAE_MAX_PRIME_LEN + 255) |
| #define SAE_CONFIRM_MAX_LEN (2 + SAE_MAX_HASH_LEN) |
| |
| /* Special value returned by sae_parse_commit() */ |
| #define SAE_SILENTLY_DISCARD 65535 |
| |
| struct sae_temporary_data { |
| u8 kck[SAE_MAX_HASH_LEN]; |
| size_t kck_len; |
| struct crypto_bignum *own_commit_scalar; |
| struct crypto_bignum *own_commit_element_ffc; |
| struct crypto_ec_point *own_commit_element_ecc; |
| struct crypto_bignum *peer_commit_element_ffc; |
| struct crypto_ec_point *peer_commit_element_ecc; |
| struct crypto_ec_point *pwe_ecc; |
| struct crypto_bignum *pwe_ffc; |
| struct crypto_bignum *sae_rand; |
| struct crypto_ec *ec; |
| int prime_len; |
| int order_len; |
| const struct dh_group *dh; |
| const struct crypto_bignum *prime; |
| const struct crypto_bignum *order; |
| struct crypto_bignum *prime_buf; |
| struct crypto_bignum *order_buf; |
| struct wpabuf *anti_clogging_token; |
| char *pw_id; |
| int vlan_id; |
| u8 bssid[ETH_ALEN]; |
| struct wpabuf *own_rejected_groups; |
| struct wpabuf *peer_rejected_groups; |
| unsigned int h2e:1; |
| unsigned int own_addr_higher:1; |
| }; |
| |
| struct sae_pt { |
| struct sae_pt *next; |
| int group; |
| struct crypto_ec *ec; |
| struct crypto_ec_point *ecc_pt; |
| |
| const struct dh_group *dh; |
| struct crypto_bignum *ffc_pt; |
| }; |
| |
| enum sae_state { |
| SAE_NOTHING, SAE_COMMITTED, SAE_CONFIRMED, SAE_ACCEPTED |
| }; |
| |
| struct sae_data { |
| enum sae_state state; |
| u16 send_confirm; |
| u8 pmk[SAE_PMK_LEN]; |
| u8 pmkid[SAE_PMKID_LEN]; |
| struct crypto_bignum *peer_commit_scalar; |
| struct crypto_bignum *peer_commit_scalar_accepted; |
| int group; |
| unsigned int sync; /* protocol instance variable: Sync */ |
| u16 rc; /* protocol instance variable: Rc (received send-confirm) */ |
| struct sae_temporary_data *tmp; |
| }; |
| |
| int sae_set_group(struct sae_data *sae, int group); |
| void sae_clear_temp_data(struct sae_data *sae); |
| void sae_clear_data(struct sae_data *sae); |
| |
| int sae_prepare_commit(const u8 *addr1, const u8 *addr2, |
| const u8 *password, size_t password_len, |
| const char *identifier, struct sae_data *sae); |
| int sae_prepare_commit_pt(struct sae_data *sae, const struct sae_pt *pt, |
| const u8 *addr1, const u8 *addr2, |
| int *rejected_groups); |
| int sae_process_commit(struct sae_data *sae); |
| int sae_write_commit(struct sae_data *sae, struct wpabuf *buf, |
| const struct wpabuf *token, const char *identifier); |
| u16 sae_parse_commit(struct sae_data *sae, const u8 *data, size_t len, |
| const u8 **token, size_t *token_len, int *allowed_groups, |
| int h2e); |
| void sae_write_confirm(struct sae_data *sae, struct wpabuf *buf); |
| int sae_check_confirm(struct sae_data *sae, const u8 *data, size_t len); |
| u16 sae_group_allowed(struct sae_data *sae, int *allowed_groups, u16 group); |
| const char * sae_state_txt(enum sae_state state); |
| struct sae_pt * sae_derive_pt(int *groups, const u8 *ssid, size_t ssid_len, |
| const u8 *password, size_t password_len, |
| const char *identifier); |
| struct crypto_ec_point * |
| sae_derive_pwe_from_pt_ecc(const struct sae_pt *pt, |
| const u8 *addr1, const u8 *addr2); |
| struct crypto_bignum * |
| sae_derive_pwe_from_pt_ffc(const struct sae_pt *pt, |
| const u8 *addr1, const u8 *addr2); |
| void sae_deinit_pt(struct sae_pt *pt); |
| |
| #endif /* SAE_H */ |