diff options
| -rw-r--r-- | net/mac80211/tkip.c | 27 |
1 files changed, 10 insertions, 17 deletions
diff --git a/net/mac80211/tkip.c b/net/mac80211/tkip.c index d74c91e..e9ee247 100644 --- a/net/mac80211/tkip.c +++ b/net/mac80211/tkip.c @@ -71,10 +71,12 @@ static u16 tkipS(u16 val) * TSC = TKIP sequence counter (48 bits, only 32 msb bits used) * P1K: 80 bits */ -static void tkip_mixing_phase1(const u8 *ta, const u8 *tk, u32 tsc_IV32, - u16 *p1k) +static void tkip_mixing_phase1(struct ieee80211_key *key, const u8 *ta, + struct tkip_ctx *ctx, u32 tsc_IV32) { int i, j; + const u8 *tk = &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY]; + u16 *p1k = ctx->p1k; p1k[0] = tsc_IV32 & 0xFFFF; p1k[1] = tsc_IV32 >> 16; @@ -90,6 +92,7 @@ static void tkip_mixing_phase1(const u8 *ta, const u8 *tk, u32 tsc_IV32, p1k[3] += tkipS(p1k[2] ^ get_unaligned_le16(tk + 12 + j)); p1k[4] += tkipS(p1k[3] ^ get_unaligned_le16(tk + 0 + j)) + i; } + ctx->initialized = 1; } static void tkip_mixing_phase2(const u16 *p1k, const u8 *tk, u16 tsc_IV16, @@ -146,12 +149,8 @@ static void ieee80211_tkip_gen_rc4key(struct ieee80211_key *key, u8 *ta, u8 *rc4key) { /* Calculate per-packet key */ - if (key->u.tkip.tx.iv16 == 0 || !key->u.tkip.tx.initialized) { - /* IV16 wrapped around - perform TKIP phase 1 */ - tkip_mixing_phase1(ta, &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], - key->u.tkip.tx.iv32, key->u.tkip.tx.p1k); - key->u.tkip.tx.initialized = 1; - } + if (key->u.tkip.tx.iv16 == 0 || !key->u.tkip.tx.initialized) + tkip_mixing_phase1(key, ta, &key->u.tkip.tx, key->u.tkip.tx.iv32); tkip_mixing_phase2(key->u.tkip.tx.p1k, &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], @@ -190,12 +189,8 @@ 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) { - /* IV16 wrapped around - perform TKIP phase 1 */ - tkip_mixing_phase1(ta, &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], - iv32, key->u.tkip.tx.p1k); - key->u.tkip.tx.initialized = 1; - } + if (iv16 == 0 || !key->u.tkip.tx.initialized) + tkip_mixing_phase1(key, ta, &key->u.tkip.tx, iv32); if (type == IEEE80211_TKIP_P1_KEY) { memcpy(outkey, key->u.tkip.tx.p1k, sizeof(u16) * 5); @@ -286,10 +281,8 @@ int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm, if (!key->u.tkip.rx[queue].initialized || key->u.tkip.rx[queue].iv32 != iv32) { - key->u.tkip.rx[queue].initialized = 1; /* IV16 wrapped around - perform TKIP phase 1 */ - tkip_mixing_phase1(ta, &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], - iv32, key->u.tkip.rx[queue].p1k); + tkip_mixing_phase1(key, ta, &key->u.tkip.rx[queue], iv32); #ifdef CONFIG_TKIP_DEBUG { int i; |