1 /* 2 * EAPOL definitions shared between hostapd and wpa_supplicant 3 * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #ifndef EAPOL_COMMON_H 16 #define EAPOL_COMMON_H 17 18 /* IEEE Std 802.1X-2004 */ 19 20 struct ieee802_1x_hdr { 21 u8 version; 22 u8 type; 23 be16 length; 24 /* followed by length octets of data */ 25 } STRUCT_PACKED; 26 27 28 #define EAPOL_VERSION 2 29 #define SPP_AMSDU_CAP_ENABLE 1 30 #define SPP_AMSDU_REQ_ENABLE 1 31 #define SPP_AMSDU_CAP_DISABLE 0 32 #define SPP_AMSDU_REQ_DISABLE 0 33 34 enum { IEEE802_1X_TYPE_EAP_PACKET = 0, 35 IEEE802_1X_TYPE_EAPOL_START = 1, 36 IEEE802_1X_TYPE_EAPOL_LOGOFF = 2, 37 IEEE802_1X_TYPE_EAPOL_KEY = 3, 38 IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT = 4 39 }; 40 41 enum { EAPOL_KEY_TYPE_RC4 = 1, EAPOL_KEY_TYPE_RSN = 2, 42 EAPOL_KEY_TYPE_WPA = 254 }; 43 44 #define IEEE8021X_REPLAY_COUNTER_LEN 8 45 #define IEEE8021X_KEY_SIGN_LEN 16 46 #define IEEE8021X_KEY_IV_LEN 16 47 48 #define IEEE8021X_KEY_INDEX_FLAG 0x80 49 #define IEEE8021X_KEY_INDEX_MASK 0x03 50 51 struct ieee802_1x_eapol_key { 52 u8 type; 53 /* Note: key_length is unaligned */ 54 u8 key_length[2]; 55 /* does not repeat within the life of the keying material used to 56 * encrypt the Key field; 64-bit NTP timestamp MAY be used here */ 57 u8 replay_counter[IEEE8021X_REPLAY_COUNTER_LEN]; 58 u8 key_iv[IEEE8021X_KEY_IV_LEN]; /* cryptographically random number */ 59 u8 key_index; /* key flag in the most significant bit: 60 * 0 = broadcast (default key), 61 * 1 = unicast (key mapping key); key index is in the 62 * 7 least significant bits */ 63 /* HMAC-MD5 message integrity check computed with MS-MPPE-Send-Key as 64 * the key */ 65 u8 key_signature[IEEE8021X_KEY_SIGN_LEN]; 66 67 /* followed by key: if packet body length = 44 + key length, then the 68 * key field (of key_length bytes) contains the key in encrypted form; 69 * if packet body length = 44, key field is absent and key_length 70 * represents the number of least significant octets from 71 * MS-MPPE-Send-Key attribute to be used as the keying material; 72 * RC4 key used in encryption = Key-IV + MS-MPPE-Recv-Key */ 73 } STRUCT_PACKED; 74 75 #endif /* EAPOL_COMMON_H */ 76
