aboutsummaryrefslogtreecommitdiff
path: root/net/mac80211/tkip.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/mac80211/tkip.c')
-rw-r--r--net/mac80211/tkip.c86
1 files changed, 34 insertions, 52 deletions
diff --git a/net/mac80211/tkip.c b/net/mac80211/tkip.c
index a7c3febc5a4..a00cf1ea771 100644
--- a/net/mac80211/tkip.c
+++ b/net/mac80211/tkip.c
@@ -6,7 +6,6 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-
#include <linux/kernel.h>
#include <linux/bitops.h>
#include <linux/types.h>
@@ -72,10 +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;
@@ -91,12 +92,15 @@ 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,
- u8 *rc4key)
+static void tkip_mixing_phase2(struct ieee80211_key *key, struct tkip_ctx *ctx,
+ u16 tsc_IV16, u8 *rc4key)
{
u16 ppk[6];
+ const u16 *p1k = ctx->p1k;
+ const u8 *tk = &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY];
int i;
ppk[0] = p1k[0];
@@ -132,38 +136,25 @@ static void tkip_mixing_phase2(const u16 *p1k, const u8 *tk, u16 tsc_IV16,
/* Add TKIP IV and Ext. IV at @pos. @iv0, @iv1, and @iv2 are the first octets
* of the IV. Returns pointer to the octet following IVs (i.e., beginning of
* the packet payload). */
-u8 * ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key *key,
+u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key *key,
u8 iv0, u8 iv1, u8 iv2)
{
*pos++ = iv0;
*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;
}
-void ieee80211_tkip_gen_phase1key(struct ieee80211_key *key, u8 *ta,
- u16 *phase1key)
-{
- tkip_mixing_phase1(ta, &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY],
- key->u.tkip.iv32, phase1key);
-}
-
-void ieee80211_tkip_gen_rc4key(struct ieee80211_key *key, u8 *ta,
+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) {
- /* 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;
- }
+ 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.p1k,
- &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY],
- key->u.tkip.iv16, rc4key);
+ tkip_mixing_phase2(key, &key->u.tkip.tx, key->u.tkip.tx.iv16, rc4key);
}
void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf,
@@ -187,9 +178,9 @@ 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");
}
@@ -198,20 +189,15 @@ 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) {
- /* 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;
- }
+ 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.p1k, sizeof(u16) * 5);
+ memcpy(outkey, key->u.tkip.tx.p1k, sizeof(u16) * 5);
return;
}
- tkip_mixing_phase2(key->u.tkip.p1k,
- &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], iv16, outkey);
+ tkip_mixing_phase2(key, &key->u.tkip.tx, iv16, outkey);
}
EXPORT_SYMBOL(ieee80211_get_tkip_key);
@@ -271,33 +257,31 @@ 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) {
/* 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]);
+ tkip_mixing_phase1(key, ta, &key->u.tkip.rx[queue], iv32);
#ifdef CONFIG_TKIP_DEBUG
{
int i;
@@ -311,7 +295,7 @@ 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 */
@@ -326,13 +310,11 @@ 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],
- &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY],
- iv16, rc4key);
+ tkip_mixing_phase2(key, &key->u.tkip.rx[queue], iv16, rc4key);
#ifdef CONFIG_TKIP_DEBUG
{
int i;
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-26 06:26:48 +0000