/*
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* EAP server/peer: EAP-EKE shared routines
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* Copyright (c) 2011-2013, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#ifndef EAP_EKE_COMMON_H
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#define EAP_EKE_COMMON_H
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/* EKE Exchange */
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#define EAP_EKE_ID 1
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#define EAP_EKE_COMMIT 2
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#define EAP_EKE_CONFIRM 3
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#define EAP_EKE_FAILURE 4
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/* Diffie-Hellman Group Registry */
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#define EAP_EKE_DHGROUP_EKE_2 1
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#define EAP_EKE_DHGROUP_EKE_5 2
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#define EAP_EKE_DHGROUP_EKE_14 3 /* mandatory to implement */
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#define EAP_EKE_DHGROUP_EKE_15 4
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#define EAP_EKE_DHGROUP_EKE_16 5
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/* Encryption Algorithm Registry */
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#define EAP_EKE_ENCR_AES128_CBC 1 /* mandatory to implement */
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/* Pseudo Random Function Registry */
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#define EAP_EKE_PRF_HMAC_SHA1 1 /* mandatory to implement */
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#define EAP_EKE_PRF_HMAC_SHA2_256 2
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/* Keyed Message Digest (MAC) Registry */
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#define EAP_EKE_MAC_HMAC_SHA1 1 /* mandatory to implement */
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#define EAP_EKE_MAC_HMAC_SHA2_256 2
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/* Identity Type Registry */
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#define EAP_EKE_ID_OPAQUE 1
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#define EAP_EKE_ID_NAI 2
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#define EAP_EKE_ID_IPv4 3
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#define EAP_EKE_ID_IPv6 4
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#define EAP_EKE_ID_FQDN 5
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#define EAP_EKE_ID_DN 6
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/* Failure-Code */
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#define EAP_EKE_FAIL_NO_ERROR 1
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#define EAP_EKE_FAIL_PROTO_ERROR 2
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#define EAP_EKE_FAIL_PASSWD_NOT_FOUND 3
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#define EAP_EKE_FAIL_AUTHENTICATION_FAIL 4
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#define EAP_EKE_FAIL_AUTHORIZATION_FAIL 5
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#define EAP_EKE_FAIL_NO_PROPOSAL_CHOSEN 6
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#define EAP_EKE_FAIL_PRIVATE_INTERNAL_ERROR 0xffffffff
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#define EAP_EKE_MAX_DH_LEN 512
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#define EAP_EKE_MAX_HASH_LEN 32
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#define EAP_EKE_MAX_KEY_LEN 16
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#define EAP_EKE_MAX_KE_LEN 16
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#define EAP_EKE_MAX_KI_LEN 32
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#define EAP_EKE_MAX_KA_LEN 32
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#define EAP_EKE_MAX_NONCE_LEN 16
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struct eap_eke_session {
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/* Selected proposal */
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u8 dhgroup;
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u8 encr;
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u8 prf;
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u8 mac;
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u8 shared_secret[EAP_EKE_MAX_HASH_LEN];
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u8 ke[EAP_EKE_MAX_KE_LEN];
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u8 ki[EAP_EKE_MAX_KI_LEN];
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u8 ka[EAP_EKE_MAX_KA_LEN];
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int prf_len;
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int nonce_len;
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int auth_len;
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int dhcomp_len;
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int pnonce_len;
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int pnonce_ps_len;
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};
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int eap_eke_session_init(struct eap_eke_session *sess, u8 dhgroup, u8 encr,
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u8 prf, u8 mac);
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void eap_eke_session_clean(struct eap_eke_session *sess);
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int eap_eke_dh_init(u8 group, u8 *ret_priv, u8 *ret_pub);
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int eap_eke_derive_key(struct eap_eke_session *sess,
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const u8 *password, size_t password_len,
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const u8 *id_s, size_t id_s_len, const u8 *id_p,
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size_t id_p_len, u8 *key);
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int eap_eke_dhcomp(struct eap_eke_session *sess, const u8 *key, const u8 *dhpub,
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u8 *ret_dhcomp);
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int eap_eke_shared_secret(struct eap_eke_session *sess, const u8 *key,
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const u8 *dhpriv, const u8 *peer_dhcomp);
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int eap_eke_derive_ke_ki(struct eap_eke_session *sess,
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const u8 *id_s, size_t id_s_len,
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const u8 *id_p, size_t id_p_len);
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int eap_eke_derive_ka(struct eap_eke_session *sess,
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const u8 *id_s, size_t id_s_len,
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const u8 *id_p, size_t id_p_len,
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const u8 *nonce_p, const u8 *nonce_s);
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int eap_eke_derive_msk(struct eap_eke_session *sess,
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const u8 *id_s, size_t id_s_len,
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const u8 *id_p, size_t id_p_len,
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const u8 *nonce_p, const u8 *nonce_s,
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u8 *msk, u8 *emsk);
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int eap_eke_prot(struct eap_eke_session *sess,
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const u8 *data, size_t data_len,
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u8 *prot, size_t *prot_len);
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int eap_eke_decrypt_prot(struct eap_eke_session *sess,
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const u8 *prot, size_t prot_len,
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u8 *data, size_t *data_len);
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int eap_eke_auth(struct eap_eke_session *sess, const char *label,
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const struct wpabuf *msgs, u8 *auth);
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#endif /* EAP_EKE_COMMON_H */
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