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Diffstat (limited to 'net/mac80211/tkip.c')
-rw-r--r--net/mac80211/tkip.c70
1 files changed, 68 insertions, 2 deletions
diff --git a/net/mac80211/tkip.c b/net/mac80211/tkip.c
index 3abe194e4d5..dddbfd60f35 100644
--- a/net/mac80211/tkip.c
+++ b/net/mac80211/tkip.c
@@ -12,7 +12,7 @@
#include <linux/netdevice.h>
#include <net/mac80211.h>
-#include "ieee80211_key.h"
+#include "key.h"
#include "tkip.h"
#include "wep.h"
@@ -214,6 +214,59 @@ void ieee80211_tkip_gen_rc4key(struct ieee80211_key *key, u8 *ta,
key->u.tkip.iv16, rc4key);
}
+void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf,
+ struct sk_buff *skb, enum ieee80211_tkip_key_type type,
+ u8 *outkey)
+{
+ 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 *ta = hdr->addr2;
+ u16 iv16;
+ u32 iv32;
+
+ iv16 = data[hdr_len] << 8;
+ iv16 += data[hdr_len + 2];
+ iv32 = data[hdr_len + 4] +
+ (data[hdr_len + 5] >> 8) +
+ (data[hdr_len + 6] >> 16) +
+ (data[hdr_len + 7] >> 24);
+
+#ifdef CONFIG_TKIP_DEBUG
+ printk(KERN_DEBUG "TKIP encrypt: iv16 = 0x%04x, iv32 = 0x%08x\n",
+ iv16, iv32);
+
+ if (iv32 != key->u.tkip.iv32) {
+ printk(KERN_DEBUG "skb: iv32 = 0x%08x key: iv32 = 0x%08x\n",
+ iv32, key->u.tkip.iv32);
+ printk(KERN_DEBUG "Wrap around of iv16 in the middle of a "
+ "fragmented packet\n");
+ }
+#endif /* CONFIG_TKIP_DEBUG */
+
+ /* 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 (type == IEEE80211_TKIP_P1_KEY) {
+ memcpy(outkey, key->u.tkip.p1k, sizeof(u16) * 5);
+ return;
+ }
+
+ tkip_mixing_phase2(key->u.tkip.p1k,
+ &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY], iv16, outkey);
+}
+EXPORT_SYMBOL(ieee80211_get_tkip_key);
+
/* Encrypt packet payload with TKIP using @key. @pos is a pointer to the
* beginning of the buffer containing payload. This payload must include
* headroom of eight octets for IV and Ext. IV and taildroom of four octets
@@ -238,7 +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;
@@ -315,6 +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],