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mac80211: allows driver to request a Phase 1 RX key

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This patch makes mac80211 able to send a phase1 key for TKIP
decryption.
This is needed for drivers that don't do the rekeying by themselves
(i.e. iwlwifi). Upon IV16 wrap around, the packet is decrypted in SW,
if decryption is ok, mac80211 calls to update_tkip_key  with a new
phase 1 RX key.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Emmanuel Grumbach
2008-03-20 15:06:42 +02:00
committed by John W. Linville
parent 5d2cdcd4e8
commit 9ae4fda332
4 changed files with 33 additions and 3 deletions
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15
net/mac80211/tkip.c
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@@ -291,7 +291,7 @@ void ieee80211_tkip_encrypt_data(struct crypto_blkcipher *tfm,
int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm,
struct ieee80211_key *key,
u8 *payload, size_t payload_len, u8 *ta,
int only_iv, int queue,
u8 *ra, int only_iv, int queue,
u32 *out_iv32, u16 *out_iv16)
{
u32 iv32;
@@ -368,6 +368,19 @@ int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm,
printk("\n");
}
#endif /* CONFIG_TKIP_DEBUG */
if (key->local->ops->update_tkip_key &&
key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) {
u8 bcast[ETH_ALEN] =
{0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
u8 *sta_addr = key->sta->addr;
if (is_multicast_ether_addr(ra))
sta_addr = bcast;
key->local->ops->update_tkip_key(
local_to_hw(key->local), &key->conf,
sta_addr, iv32, key->u.tkip.p1k_rx[queue]);
}
}
tkip_mixing_phase2(key->u.tkip.p1k_rx[queue],