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72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/*
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* EAPOL definitions shared between hostapd and wpa_supplicant
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* Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#ifndef EAPOL_COMMON_H
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#define EAPOL_COMMON_H
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/* IEEE Std 802.1X-2004 */
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struct ieee802_1x_hdr {
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u8 version;
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u8 type;
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be16 length;
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/* followed by length octets of data */
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} STRUCT_PACKED;
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#define EAPOL_VERSION 2
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enum { IEEE802_1X_TYPE_EAP_PACKET = 0,
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IEEE802_1X_TYPE_EAPOL_START = 1,
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IEEE802_1X_TYPE_EAPOL_LOGOFF = 2,
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IEEE802_1X_TYPE_EAPOL_KEY = 3,
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IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT = 4
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};
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enum { EAPOL_KEY_TYPE_RC4 = 1, EAPOL_KEY_TYPE_RSN = 2,
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EAPOL_KEY_TYPE_WPA = 254 };
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#define IEEE8021X_REPLAY_COUNTER_LEN 8
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#define IEEE8021X_KEY_SIGN_LEN 16
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#define IEEE8021X_KEY_IV_LEN 16
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#define IEEE8021X_KEY_INDEX_FLAG 0x80
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#define IEEE8021X_KEY_INDEX_MASK 0x03
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struct ieee802_1x_eapol_key {
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u8 type;
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/* Note: key_length is unaligned */
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u8 key_length[2];
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/* does not repeat within the life of the keying material used to
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* encrypt the Key field; 64-bit NTP timestamp MAY be used here */
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u8 replay_counter[IEEE8021X_REPLAY_COUNTER_LEN];
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u8 key_iv[IEEE8021X_KEY_IV_LEN]; /* cryptographically random number */
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u8 key_index; /* key flag in the most significant bit:
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* 0 = broadcast (default key),
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* 1 = unicast (key mapping key); key index is in the
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* 7 least significant bits */
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/* HMAC-MD5 message integrity check computed with MS-MPPE-Send-Key as
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* the key */
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u8 key_signature[IEEE8021X_KEY_SIGN_LEN];
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/* followed by key: if packet body length = 44 + key length, then the
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* key field (of key_length bytes) contains the key in encrypted form;
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* if packet body length = 44, key field is absent and key_length
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* represents the number of least significant octets from
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* MS-MPPE-Send-Key attribute to be used as the keying material;
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* RC4 key used in encryption = Key-IV + MS-MPPE-Recv-Key */
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} STRUCT_PACKED;
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#endif /* EAPOL_COMMON_H */
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