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Share a single definition of EAPOL-Key structure for WEP keys

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Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-08-07 21:27:01 +03:00
parent 47e9d50d18
commit 70a26e708c
4 changed files with 41 additions and 73 deletions
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2
src/ap/ieee802_1x.c
View file

@ -126,7 +126,7 @@ static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
hdr = (struct ieee802_1x_hdr *) buf;
key = (struct ieee802_1x_eapol_key *) (hdr + 1);
key->type = EAPOL_KEY_TYPE_RC4;
key->key_length = htons(key_len);
WPA_PUT_BE16(key->key_length, key_len);
wpa_get_ntp_timestamp(key->replay_counter);
if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {

32
src/ap/ieee802_1x.h
View file

@ -17,38 +17,6 @@ struct hostapd_bss_config;
struct hostapd_radius_attr;
struct radius_msg;
#ifdef _MSC_VER
#pragma pack(push, 1)
#endif /* _MSC_VER */
/* RFC 3580, 4. RC4 EAPOL-Key Frame */
struct ieee802_1x_eapol_key {
u8 type;
u16 key_length;
u8 replay_counter[8]; /* does not repeat within the life of the keying
* material used to encrypt the Key field;
* 64-bit NTP timestamp MAY be used here */
u8 key_iv[16]; /* cryptographically random number */
u8 key_index; /* key flag in the most significant bit:
* 0 = broadcast (default key),
* 1 = unicast (key mapping key); key index is in the
* 7 least significant bits */
u8 key_signature[16]; /* HMAC-MD5 message integrity check computed with
* MS-MPPE-Send-Key as the key */
/* followed by key: if packet body length = 44 + key length, then the
* key field (of key_length bytes) contains the key in encrypted form;
* if packet body length = 44, key field is absent and key_length
* represents the number of least significant octets from
* MS-MPPE-Send-Key attribute to be used as the keying material;
* RC4 key used in encryption = Key-IV + MS-MPPE-Recv-Key */
} STRUCT_PACKED;
#ifdef _MSC_VER
#pragma pack(pop)
#endif /* _MSC_VER */
void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
size_t len);

40
src/common/eapol_common.h
View file

@ -38,4 +38,44 @@ enum { IEEE802_1X_TYPE_EAP_PACKET = 0,
enum { EAPOL_KEY_TYPE_RC4 = 1, EAPOL_KEY_TYPE_RSN = 2,
EAPOL_KEY_TYPE_WPA = 254 };
#define IEEE8021X_REPLAY_COUNTER_LEN 8
#define IEEE8021X_KEY_SIGN_LEN 16
#define IEEE8021X_KEY_IV_LEN 16
#define IEEE8021X_KEY_INDEX_FLAG 0x80
#define IEEE8021X_KEY_INDEX_MASK 0x03
#ifdef _MSC_VER
#pragma pack(push, 1)
#endif /* _MSC_VER */
struct ieee802_1x_eapol_key {
u8 type;
/* Note: key_length is unaligned */
u8 key_length[2];
/* does not repeat within the life of the keying material used to
* encrypt the Key field; 64-bit NTP timestamp MAY be used here */
u8 replay_counter[IEEE8021X_REPLAY_COUNTER_LEN];
u8 key_iv[IEEE8021X_KEY_IV_LEN]; /* cryptographically random number */
u8 key_index; /* key flag in the most significant bit:
* 0 = broadcast (default key),
* 1 = unicast (key mapping key); key index is in the
* 7 least significant bits */
/* HMAC-MD5 message integrity check computed with MS-MPPE-Send-Key as
* the key */
u8 key_signature[IEEE8021X_KEY_SIGN_LEN];
/* followed by key: if packet body length = 44 + key length, then the
* key field (of key_length bytes) contains the key in encrypted form;
* if packet body length = 44, key field is absent and key_length
* represents the number of least significant octets from
* MS-MPPE-Send-Key attribute to be used as the keying material;
* RC4 key used in encryption = Key-IV + MS-MPPE-Recv-Key */
} STRUCT_PACKED;
#ifdef _MSC_VER
#pragma pack(pop)
#endif /* _MSC_VER */
#endif /* EAPOL_COMMON_H */

40
src/eapol_supp/eapol_supp_sm.c
View file

@ -139,46 +139,6 @@ struct eapol_sm {
};
#define IEEE8021X_REPLAY_COUNTER_LEN 8
#define IEEE8021X_KEY_SIGN_LEN 16
#define IEEE8021X_KEY_IV_LEN 16
#define IEEE8021X_KEY_INDEX_FLAG 0x80
#define IEEE8021X_KEY_INDEX_MASK 0x03
#ifdef _MSC_VER
#pragma pack(push, 1)
#endif /* _MSC_VER */
struct ieee802_1x_eapol_key {
u8 type;
/* Note: key_length is unaligned */
u8 key_length[2];
/* does not repeat within the life of the keying material used to
* encrypt the Key field; 64-bit NTP timestamp MAY be used here */
u8 replay_counter[IEEE8021X_REPLAY_COUNTER_LEN];
u8 key_iv[IEEE8021X_KEY_IV_LEN]; /* cryptographically random number */
u8 key_index; /* key flag in the most significant bit:
* 0 = broadcast (default key),
* 1 = unicast (key mapping key); key index is in the
* 7 least significant bits */
/* HMAC-MD5 message integrity check computed with MS-MPPE-Send-Key as
* the key */
u8 key_signature[IEEE8021X_KEY_SIGN_LEN];
/* followed by key: if packet body length = 44 + key length, then the
* key field (of key_length bytes) contains the key in encrypted form;
* if packet body length = 44, key field is absent and key_length
* represents the number of least significant octets from
* MS-MPPE-Send-Key attribute to be used as the keying material;
* RC4 key used in encryption = Key-IV + MS-MPPE-Recv-Key */
} STRUCT_PACKED;
#ifdef _MSC_VER
#pragma pack(pop)
#endif /* _MSC_VER */
static void eapol_sm_txLogoff(struct eapol_sm *sm);
static void eapol_sm_txStart(struct eapol_sm *sm);
static void eapol_sm_processKey(struct eapol_sm *sm);