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mac80211: Let drivers have access to TKIP key offets for TX and RX MIC

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Some drivers may want to to use the TKIP key offsets for TX and RX
MIC so lets move this out. Lets also clear up a bit how this is used
internally in mac80211.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez
2008-06-21 10:02:46 -04:00
committed by John W. Linville
parent 61243d8e79
commit ffd7891dc9
5 changed files with 40 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
net/mac80211/wpa.c
View File

@ -49,7 +49,7 @@ static int ieee80211_get_hdr_info(const struct sk_buff *skb, u8 **sa, u8 **da,
ieee80211_tx_result
ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)
{
u8 *data, *sa, *da, *key, *mic, qos_tid;
u8 *data, *sa, *da, *key, *mic, qos_tid, key_offset;
size_t data_len;
u16 fc;
struct sk_buff *skb = tx->skb;
@ -88,8 +88,12 @@ ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)
#else
authenticator = 1;
#endif
key = &tx->key->conf.key[authenticator ? ALG_TKIP_TEMP_AUTH_TX_MIC_KEY :
ALG_TKIP_TEMP_AUTH_RX_MIC_KEY];
/* At this point we know we're using ALG_TKIP. To get the MIC key
* we now will rely on the offset from the ieee80211_key_conf::key */
key_offset = authenticator ?
NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY :
NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY;
key = &tx->key->conf.key[key_offset];
mic = skb_put(skb, MICHAEL_MIC_LEN);
michael_mic(key, da, sa, qos_tid & 0x0f, data, data_len, mic);
@ -100,7 +104,7 @@ ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)
ieee80211_rx_result
ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
{
u8 *data, *sa, *da, *key = NULL, qos_tid;
u8 *data, *sa, *da, *key = NULL, qos_tid, key_offset;
size_t data_len;
u16 fc;
u8 mic[MICHAEL_MIC_LEN];
@ -131,8 +135,12 @@ ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
#else
authenticator = 1;
#endif
key = &rx->key->conf.key[authenticator ? ALG_TKIP_TEMP_AUTH_RX_MIC_KEY :
ALG_TKIP_TEMP_AUTH_TX_MIC_KEY];
/* At this point we know we're using ALG_TKIP. To get the MIC key
* we now will rely on the offset from the ieee80211_key_conf::key */
key_offset = authenticator ?
NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY :
NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY;
key = &rx->key->conf.key[key_offset];
michael_mic(key, da, sa, qos_tid & 0x0f, data, data_len, mic);
if (memcmp(mic, data + data_len, MICHAEL_MIC_LEN) != 0 || wpa_test) {
if (!(rx->flags & IEEE80211_RX_RA_MATCH))