1 /* 2 * Simultaneous authentication of equals 3 * Copyright (c) 2012-2013, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 #ifdef CONFIG_WPA3_SAE 9 10 #ifndef SAE_H 11 #define SAE_H 12 13 #include "esp_err.h" 14 #include "utils/includes.h" 15 #include "utils/common.h" 16 #include "utils/wpa_debug.h" 17 18 #define SAE_KCK_LEN 32 19 #define SAE_PMK_LEN 32 20 #define SAE_PMKID_LEN 16 21 #define SAE_KEYSEED_KEY_LEN 32 22 #define SAE_MAX_PRIME_LEN 512 23 #define SAE_MAX_ECC_PRIME_LEN 66 24 #define SAE_COMMIT_MAX_LEN (2 + 3 * SAE_MAX_PRIME_LEN) 25 #define SAE_CONFIRM_MAX_LEN (2 + SAE_MAX_PRIME_LEN) 26 27 /* Special value returned by sae_parse_commit() */ 28 #define SAE_SILENTLY_DISCARD 65535 29 30 struct sae_temporary_data { 31 u8 kck[SAE_KCK_LEN]; 32 struct crypto_bignum *own_commit_scalar; 33 struct crypto_bignum *own_commit_element_ffc; 34 struct crypto_ec_point *own_commit_element_ecc; 35 struct crypto_bignum *peer_commit_element_ffc; 36 struct crypto_ec_point *peer_commit_element_ecc; 37 struct crypto_ec_point *pwe_ecc; 38 struct crypto_bignum *pwe_ffc; 39 struct crypto_bignum *sae_rand; 40 struct crypto_ec *ec; 41 int prime_len; 42 const struct dh_group *dh; 43 const struct crypto_bignum *prime; 44 const struct crypto_bignum *order; 45 struct crypto_bignum *prime_buf; 46 struct crypto_bignum *order_buf; 47 char *pw_id; 48 }; 49 50 enum { 51 SAE_MSG_COMMIT = 1, 52 SAE_MSG_CONFIRM = 2, 53 }; 54 55 enum sae_state { 56 SAE_NOTHING, SAE_COMMITTED, SAE_CONFIRMED, SAE_ACCEPTED 57 }; 58 59 struct sae_data { 60 enum sae_state state; 61 u16 send_confirm; 62 u8 pmk[SAE_PMK_LEN]; 63 u8 pmkid[SAE_PMKID_LEN]; 64 struct crypto_bignum *peer_commit_scalar; 65 int group; 66 unsigned int sync; /* protocol instance variable: Sync */ 67 u16 rc; /* protocol instance variable: Rc (received send-confirm) */ 68 struct sae_temporary_data *tmp; 69 }; 70 71 int sae_set_group(struct sae_data *sae, int group); 72 void sae_clear_temp_data(struct sae_data *sae); 73 void sae_clear_data(struct sae_data *sae); 74 75 int sae_prepare_commit(const u8 *addr1, const u8 *addr2, 76 const u8 *password, size_t password_len, 77 const char *identifier, struct sae_data *sae); 78 int sae_process_commit(struct sae_data *sae); 79 int sae_write_commit(struct sae_data *sae, struct wpabuf *buf, 80 const struct wpabuf *token, const char *identifier); 81 u16 sae_parse_commit(struct sae_data *sae, const u8 *data, size_t len, 82 const u8 **token, size_t *token_len, int *allowed_groups); 83 int sae_write_confirm(struct sae_data *sae, struct wpabuf *buf); 84 int sae_check_confirm(struct sae_data *sae, const u8 *data, size_t len); 85 u16 sae_group_allowed(struct sae_data *sae, int *allowed_groups, u16 group); 86 const char * sae_state_txt(enum sae_state state); 87 88 #endif /* SAE_H */ 89 #endif /* CONFIG_WPA3_SAE */ 90
