Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * EAPOL definitions shared between hostapd and wpa_supplicant |
| 3 | * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi> |
| 4 | * |
Dmitry Shmidt | c5ec7f5 | 2012-03-06 16:33:24 -0800 | [diff] [blame] | 5 | * This software may be distributed under the terms of the BSD license. |
| 6 | * See README for more details. |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #ifndef EAPOL_COMMON_H |
| 10 | #define EAPOL_COMMON_H |
| 11 | |
| 12 | /* IEEE Std 802.1X-2004 */ |
| 13 | |
| 14 | #ifdef _MSC_VER |
| 15 | #pragma pack(push, 1) |
| 16 | #endif /* _MSC_VER */ |
| 17 | |
| 18 | struct ieee802_1x_hdr { |
| 19 | u8 version; |
| 20 | u8 type; |
| 21 | be16 length; |
| 22 | /* followed by length octets of data */ |
| 23 | } STRUCT_PACKED; |
| 24 | |
| 25 | #ifdef _MSC_VER |
| 26 | #pragma pack(pop) |
| 27 | #endif /* _MSC_VER */ |
| 28 | |
| 29 | #define EAPOL_VERSION 2 |
| 30 | |
| 31 | enum { IEEE802_1X_TYPE_EAP_PACKET = 0, |
| 32 | IEEE802_1X_TYPE_EAPOL_START = 1, |
| 33 | IEEE802_1X_TYPE_EAPOL_LOGOFF = 2, |
| 34 | IEEE802_1X_TYPE_EAPOL_KEY = 3, |
| 35 | IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT = 4 |
| 36 | }; |
| 37 | |
| 38 | enum { EAPOL_KEY_TYPE_RC4 = 1, EAPOL_KEY_TYPE_RSN = 2, |
| 39 | EAPOL_KEY_TYPE_WPA = 254 }; |
| 40 | |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame^] | 41 | |
| 42 | #define IEEE8021X_REPLAY_COUNTER_LEN 8 |
| 43 | #define IEEE8021X_KEY_SIGN_LEN 16 |
| 44 | #define IEEE8021X_KEY_IV_LEN 16 |
| 45 | |
| 46 | #define IEEE8021X_KEY_INDEX_FLAG 0x80 |
| 47 | #define IEEE8021X_KEY_INDEX_MASK 0x03 |
| 48 | |
| 49 | #ifdef _MSC_VER |
| 50 | #pragma pack(push, 1) |
| 51 | #endif /* _MSC_VER */ |
| 52 | |
| 53 | struct ieee802_1x_eapol_key { |
| 54 | u8 type; |
| 55 | /* Note: key_length is unaligned */ |
| 56 | u8 key_length[2]; |
| 57 | /* does not repeat within the life of the keying material used to |
| 58 | * encrypt the Key field; 64-bit NTP timestamp MAY be used here */ |
| 59 | u8 replay_counter[IEEE8021X_REPLAY_COUNTER_LEN]; |
| 60 | u8 key_iv[IEEE8021X_KEY_IV_LEN]; /* cryptographically random number */ |
| 61 | u8 key_index; /* key flag in the most significant bit: |
| 62 | * 0 = broadcast (default key), |
| 63 | * 1 = unicast (key mapping key); key index is in the |
| 64 | * 7 least significant bits */ |
| 65 | /* HMAC-MD5 message integrity check computed with MS-MPPE-Send-Key as |
| 66 | * the key */ |
| 67 | u8 key_signature[IEEE8021X_KEY_SIGN_LEN]; |
| 68 | |
| 69 | /* followed by key: if packet body length = 44 + key length, then the |
| 70 | * key field (of key_length bytes) contains the key in encrypted form; |
| 71 | * if packet body length = 44, key field is absent and key_length |
| 72 | * represents the number of least significant octets from |
| 73 | * MS-MPPE-Send-Key attribute to be used as the keying material; |
| 74 | * RC4 key used in encryption = Key-IV + MS-MPPE-Recv-Key */ |
| 75 | } STRUCT_PACKED; |
| 76 | |
| 77 | #ifdef _MSC_VER |
| 78 | #pragma pack(pop) |
| 79 | #endif /* _MSC_VER */ |
| 80 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 81 | #endif /* EAPOL_COMMON_H */ |