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137 lines
4.3 KiB
C
137 lines
4.3 KiB
C
/*
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*
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* eap_packet.h
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* $Id: eap_packet.h 991 2009-09-14 01:38:58Z sekine $
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*
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*/
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#ifndef EAP_PACKET_H
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#define EAP_PACKET_H
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#define WBIT(n) (1 << (n))
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#ifndef ETH_ALEN
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#define ETH_ALEN 6
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#endif
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struct ether_hdr {
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unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
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unsigned char h_source[ETH_ALEN]; /* source ether addr */
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unsigned char h_dest_snap;
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unsigned char h_source_snap;
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unsigned char h_command;
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unsigned char h_vendor_id[3];
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unsigned short h_proto; /* packet type ID field */
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#define ETHER_PROTOCOL_TYPE_EAP 0x888e
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#define ETHER_PROTOCOL_TYPE_IP 0x0800
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#define ETHER_PROTOCOL_TYPE_ARP 0x0806
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/* followed by length octets of data */
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} __attribute__ ((packed));
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struct ieee802_1x_hdr {
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unsigned char version;
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unsigned char type;
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unsigned short length;
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/* followed by length octets of data */
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} __attribute__ ((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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unsigned char type;
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unsigned short key_length;
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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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unsigned char replay_counter[IEEE8021X_REPLAY_COUNTER_LEN];
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unsigned char key_iv[IEEE8021X_KEY_IV_LEN]; /* cryptographically random number */
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unsigned char 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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unsigned char 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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} __attribute__ ((packed));
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#define WPA_NONCE_LEN 32
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#define WPA_REPLAY_COUNTER_LEN 8
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struct wpa_eapol_key {
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unsigned char type;
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unsigned short key_info;
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unsigned short key_length;
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unsigned char replay_counter[WPA_REPLAY_COUNTER_LEN];
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unsigned char key_nonce[WPA_NONCE_LEN];
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unsigned char key_iv[16];
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unsigned char key_rsc[8];
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unsigned char key_id[8]; /* Reserved in IEEE 802.11i/RSN */
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unsigned char key_mic[16];
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unsigned short key_data_length;
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/* followed by key_data_length bytes of key_data */
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} __attribute__ ((packed));
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#define WPA_KEY_INFO_TYPE_MASK (WBIT(0) | WBIT(1) | WBIT(2))
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#define WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 WBIT(0)
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#define WPA_KEY_INFO_TYPE_HMAC_SHA1_AES WBIT(1)
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#define WPA_KEY_INFO_KEY_TYPE WBIT(3) /* 1 = Pairwise, 0 = Group key */
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/* bit4..5 is used in WPA, but is reserved in IEEE 802.11i/RSN */
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#define WPA_KEY_INFO_KEY_INDEX_MASK (WBIT(4) | WBIT(5))
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#define WPA_KEY_INFO_KEY_INDEX_SHIFT 4
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#define WPA_KEY_INFO_INSTALL WBIT(6) /* pairwise */
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#define WPA_KEY_INFO_TXRX WBIT(6) /* group */
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#define WPA_KEY_INFO_ACK WBIT(7)
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#define WPA_KEY_INFO_MIC WBIT(8)
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#define WPA_KEY_INFO_SECURE WBIT(9)
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#define WPA_KEY_INFO_ERROR WBIT(10)
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#define WPA_KEY_INFO_REQUEST WBIT(11)
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#define WPA_KEY_INFO_ENCR_KEY_DATA WBIT(12) /* IEEE 802.11i/RSN only */
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#define WPA_CAPABILITY_PREAUTH WBIT(0)
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#define GENERIC_INFO_ELEM 0xdd
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#define RSN_INFO_ELEM 0x30
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enum {
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REASON_UNSPECIFIED = 1,
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REASON_DEAUTH_LEAVING = 3,
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REASON_INVALID_IE = 13,
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REASON_MICHAEL_MIC_FAILURE = 14,
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REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
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REASON_GROUP_KEY_UPDATE_TIMEOUT = 16,
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REASON_IE_IN_4WAY_DIFFERS = 17,
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REASON_GROUP_CIPHER_NOT_VALID = 18,
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REASON_PAIRWISE_CIPHER_NOT_VALID = 19,
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REASON_AKMP_NOT_VALID = 20,
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REASON_UNSUPPORTED_RSN_IE_VERSION = 21,
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REASON_INVALID_RSN_IE_CAPAB = 22,
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REASON_IEEE_802_1X_AUTH_FAILED = 23,
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REASON_CIPHER_SUITE_REJECTED = 24
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};
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#endif /* EAP_PACKET_H */
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