diff options
| -rw-r--r-- | net/mac80211/tkip.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/net/mac80211/tkip.c b/net/mac80211/tkip.c index 8a7dac742b71..e710243d82e2 100644 --- a/net/mac80211/tkip.c +++ b/net/mac80211/tkip.c @@ -153,25 +153,27 @@ void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, { struct ieee80211_key *key = (struct ieee80211_key *) container_of(keyconf, struct ieee80211_key, conf); - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; - u8 *data = (u8 *) hdr; - u16 fc = le16_to_cpu(hdr->frame_control); - int hdr_len = ieee80211_get_hdrlen(fc); - u8 *tk = &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY]; - u8 *ta = hdr->addr2; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + u8 *data; + const u8 *tk; + struct tkip_ctx *ctx; u16 iv16; u32 iv32; - iv16 = data[hdr_len + 2] | (data[hdr_len] << 8); - iv32 = get_unaligned_le32(data + hdr_len + 4); + data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); + iv16 = data[2] | (data[0] << 8); + iv32 = get_unaligned_le32(&data[4]); + + tk = &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY]; + ctx = &key->u.tkip.tx; #ifdef CONFIG_TKIP_DEBUG printk(KERN_DEBUG "TKIP encrypt: iv16 = 0x%04x, iv32 = 0x%08x\n", iv16, iv32); - if (iv32 != key->u.tkip.tx.iv32) { + if (iv32 != ctx->iv32) { printk(KERN_DEBUG "skb: iv32 = 0x%08x key: iv32 = 0x%08x\n", - iv32, key->u.tkip.tx.iv32); + iv32, ctx->iv32); printk(KERN_DEBUG "Wrap around of iv16 in the middle of a " "fragmented packet\n"); } @@ -180,15 +182,15 @@ void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, /* Update the p1k only when the iv16 in the packet wraps around, this * might occur after the wrap around of iv16 in the key in case of * fragmented packets. */ - if (iv16 == 0 || !key->u.tkip.tx.initialized) - tkip_mixing_phase1(tk, &key->u.tkip.tx, ta, iv32); + if (iv16 == 0 || !ctx->initialized) + tkip_mixing_phase1(tk, ctx, hdr->addr2, iv32); if (type == IEEE80211_TKIP_P1_KEY) { - memcpy(outkey, key->u.tkip.tx.p1k, sizeof(u16) * 5); + memcpy(outkey, ctx->p1k, sizeof(u16) * 5); return; } - tkip_mixing_phase2(tk, &key->u.tkip.tx, iv16, outkey); + tkip_mixing_phase2(tk, ctx, iv16, outkey); } EXPORT_SYMBOL(ieee80211_get_tkip_key); |