Commit b0f76b33 authored by Harvey Harrison's avatar Harvey Harrison Committed by John W. Linville

mac80211: add a struct to hold tkip context

Signed-off-by: default avatarHarvey Harrison <harvey.harrison@gmail.com>
Cc: "John W. Linville" <linville@tuxdriver.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent a7b6f0c5
......@@ -256,8 +256,8 @@ static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
case ALG_TKIP:
params.cipher = WLAN_CIPHER_SUITE_TKIP;
iv32 = key->u.tkip.iv32;
iv16 = key->u.tkip.iv16;
iv32 = key->u.tkip.tx.iv32;
iv16 = key->u.tkip.tx.iv16;
if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
sdata->local->ops->get_tkip_seq)
......
......@@ -97,8 +97,8 @@ static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
break;
case ALG_TKIP:
len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
key->u.tkip.iv32,
key->u.tkip.iv16);
key->u.tkip.tx.iv32,
key->u.tkip.tx.iv16);
break;
case ALG_CCMP:
tpn = key->u.ccmp.tx_pn;
......@@ -128,8 +128,8 @@ static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
p += scnprintf(p, sizeof(buf)+buf-p,
"%08x %04x\n",
key->u.tkip.iv32_rx[i],
key->u.tkip.iv16_rx[i]);
key->u.tkip.rx[i].iv32,
key->u.tkip.rx[i].iv16);
len = p - buf;
break;
case ALG_CCMP:
......
......@@ -69,6 +69,13 @@ enum ieee80211_internal_key_flags {
KEY_FLAG_TODO_ADD_DEBUGFS = BIT(5),
};
struct tkip_ctx {
u32 iv32;
u16 iv16;
u16 p1k[5];
int initialized;
};
struct ieee80211_key {
struct ieee80211_local *local;
struct ieee80211_sub_if_data *sdata;
......@@ -85,16 +92,10 @@ struct ieee80211_key {
union {
struct {
/* last used TSC */
u32 iv32;
u16 iv16;
u16 p1k[5];
int tx_initialized;
struct tkip_ctx tx;
/* last received RSC */
u32 iv32_rx[NUM_RX_DATA_QUEUES];
u16 iv16_rx[NUM_RX_DATA_QUEUES];
u16 p1k_rx[NUM_RX_DATA_QUEUES][5];
int rx_initialized[NUM_RX_DATA_QUEUES];
struct tkip_ctx rx[NUM_RX_DATA_QUEUES];
} tkip;
struct {
u8 tx_pn[6];
......
......@@ -138,7 +138,7 @@ u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key *key,
*pos++ = iv1;
*pos++ = iv2;
*pos++ = (key->conf.keyidx << 6) | (1 << 5) /* Ext IV */;
put_unaligned_le32(key->u.tkip.iv32, pos);
put_unaligned_le32(key->u.tkip.tx.iv32, pos);
return pos + 4;
}
......@@ -146,16 +146,16 @@ static void ieee80211_tkip_gen_rc4key(struct ieee80211_key *key, u8 *ta,
u8 *rc4key)
{
/* Calculate per-packet key */
if (key->u.tkip.iv16 == 0 || !key->u.tkip.tx_initialized) {
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.iv32, key->u.tkip.p1k);
key->u.tkip.tx_initialized = 1;
key->u.tkip.tx.iv32, key->u.tkip.tx.p1k);
key->u.tkip.tx.initialized = 1;
}
tkip_mixing_phase2(key->u.tkip.p1k,
tkip_mixing_phase2(key->u.tkip.tx.p1k,
&key->conf.key[ALG_TKIP_TEMP_ENCR_KEY],
key->u.tkip.iv16, rc4key);
key->u.tkip.tx.iv16, rc4key);
}
void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf,
......@@ -179,9 +179,9 @@ void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf,
printk(KERN_DEBUG "TKIP encrypt: iv16 = 0x%04x, iv32 = 0x%08x\n",
iv16, iv32);
if (iv32 != key->u.tkip.iv32) {
if (iv32 != key->u.tkip.tx.iv32) {
printk(KERN_DEBUG "skb: iv32 = 0x%08x key: iv32 = 0x%08x\n",
iv32, key->u.tkip.iv32);
iv32, key->u.tkip.tx.iv32);
printk(KERN_DEBUG "Wrap around of iv16 in the middle of a "
"fragmented packet\n");
}
......@@ -190,19 +190,19 @@ 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) {
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.p1k);
key->u.tkip.tx_initialized = 1;
iv32, key->u.tkip.tx.p1k);
key->u.tkip.tx.initialized = 1;
}
if (type == IEEE80211_TKIP_P1_KEY) {
memcpy(outkey, key->u.tkip.p1k, sizeof(u16) * 5);
memcpy(outkey, key->u.tkip.tx.p1k, sizeof(u16) * 5);
return;
}
tkip_mixing_phase2(key->u.tkip.p1k,
tkip_mixing_phase2(key->u.tkip.tx.p1k,
&key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], iv16, outkey);
}
EXPORT_SYMBOL(ieee80211_get_tkip_key);
......@@ -263,33 +263,33 @@ int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm,
if ((keyid >> 6) != key->conf.keyidx)
return TKIP_DECRYPT_INVALID_KEYIDX;
if (key->u.tkip.rx_initialized[queue] &&
(iv32 < key->u.tkip.iv32_rx[queue] ||
(iv32 == key->u.tkip.iv32_rx[queue] &&
iv16 <= key->u.tkip.iv16_rx[queue]))) {
if (key->u.tkip.rx[queue].initialized &&
(iv32 < key->u.tkip.rx[queue].iv32 ||
(iv32 == key->u.tkip.rx[queue].iv32 &&
iv16 <= key->u.tkip.rx[queue].iv16))) {
#ifdef CONFIG_TKIP_DEBUG
DECLARE_MAC_BUF(mac);
printk(KERN_DEBUG "TKIP replay detected for RX frame from "
"%s (RX IV (%04x,%02x) <= prev. IV (%04x,%02x)\n",
print_mac(mac, ta),
iv32, iv16, key->u.tkip.iv32_rx[queue],
key->u.tkip.iv16_rx[queue]);
iv32, iv16, key->u.tkip.rx[queue].iv32,
key->u.tkip.rx[queue].iv16);
#endif /* CONFIG_TKIP_DEBUG */
return TKIP_DECRYPT_REPLAY;
}
if (only_iv) {
res = TKIP_DECRYPT_OK;
key->u.tkip.rx_initialized[queue] = 1;
key->u.tkip.rx[queue].initialized = 1;
goto done;
}
if (!key->u.tkip.rx_initialized[queue] ||
key->u.tkip.iv32_rx[queue] != iv32) {
key->u.tkip.rx_initialized[queue] = 1;
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.p1k_rx[queue]);
iv32, key->u.tkip.rx[queue].p1k);
#ifdef CONFIG_TKIP_DEBUG
{
int i;
......@@ -303,7 +303,7 @@ int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm,
printk("\n");
printk(KERN_DEBUG "TKIP decrypt: P1K=");
for (i = 0; i < 5; i++)
printk("%04x ", key->u.tkip.p1k_rx[queue][i]);
printk("%04x ", key->u.tkip.rx[queue].p1k[i]);
printk("\n");
}
#endif /* CONFIG_TKIP_DEBUG */
......@@ -318,11 +318,11 @@ int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm,
key->local->ops->update_tkip_key(
local_to_hw(key->local), &key->conf,
sta_addr, iv32, key->u.tkip.p1k_rx[queue]);
sta_addr, iv32, key->u.tkip.rx[queue].p1k);
}
}
tkip_mixing_phase2(key->u.tkip.p1k_rx[queue],
tkip_mixing_phase2(key->u.tkip.rx[queue].p1k,
&key->conf.key[ALG_TKIP_TEMP_ENCR_KEY],
iv16, rc4key);
#ifdef CONFIG_TKIP_DEBUG
......
......@@ -176,8 +176,8 @@ ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
/* update IV in key information to be able to detect replays */
rx->key->u.tkip.iv32_rx[rx->queue] = rx->tkip_iv32;
rx->key->u.tkip.iv16_rx[rx->queue] = rx->tkip_iv16;
rx->key->u.tkip.rx[rx->queue].iv32 = rx->tkip_iv32;
rx->key->u.tkip.rx[rx->queue].iv16 = rx->tkip_iv16;
return RX_CONTINUE;
}
......@@ -214,19 +214,19 @@ static int tkip_encrypt_skb(struct ieee80211_tx_data *tx,
pos += hdrlen;
/* Increase IV for the frame */
key->u.tkip.iv16++;
if (key->u.tkip.iv16 == 0)
key->u.tkip.iv32++;
key->u.tkip.tx.iv16++;
if (key->u.tkip.tx.iv16 == 0)
key->u.tkip.tx.iv32++;
if (tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) {
hdr = (struct ieee80211_hdr *)skb->data;
/* hwaccel - with preallocated room for IV */
ieee80211_tkip_add_iv(pos, key,
(u8) (key->u.tkip.iv16 >> 8),
(u8) (((key->u.tkip.iv16 >> 8) | 0x20) &
(u8) (key->u.tkip.tx.iv16 >> 8),
(u8) (((key->u.tkip.tx.iv16 >> 8) | 0x20) &
0x7f),
(u8) key->u.tkip.iv16);
(u8) key->u.tkip.tx.iv16);
tx->control->hw_key = &tx->key->conf;
return 0;
......
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