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authorLuis R. Rodriguez <lrodriguez@atheros.com>2008-06-21 10:02:46 -0400
committerJohn W. Linville <linville@tuxdriver.com>2008-06-27 09:09:17 -0400
commitffd7891dc909b3648e87f7cf8f84a6dc12fc1cc6 (patch)
tree563c41b3bce49effd3544081cb54ba5ab6fdfb15 /net/mac80211/wpa.c
parent61243d8e79de67d703b192fae2c4ab80fc0fac34 (diff)
mac80211: Let drivers have access to TKIP key offets for TX and RX MIC
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>
Diffstat (limited to 'net/mac80211/wpa.c')
-rw-r--r--net/mac80211/wpa.c20
1 files changed, 14 insertions, 6 deletions
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 345e10e9b31..f809761fbfb 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -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))