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path: root/net/ieee80211/ieee80211_crypt_tkip.c
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Diffstat (limited to 'net/ieee80211/ieee80211_crypt_tkip.c')
-rw-r--r--net/ieee80211/ieee80211_crypt_tkip.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/net/ieee80211/ieee80211_crypt_tkip.c b/net/ieee80211/ieee80211_crypt_tkip.c
index 259572dfd4f..4200ec50986 100644
--- a/net/ieee80211/ieee80211_crypt_tkip.c
+++ b/net/ieee80211/ieee80211_crypt_tkip.c
@@ -93,7 +93,7 @@ static void *ieee80211_tkip_init(int key_idx)
if (IS_ERR(priv->tx_tfm_arc4)) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
"crypto API arc4\n");
- priv->tfm_arc4 = NULL;
+ priv->tx_tfm_arc4 = NULL;
goto fail;
}
@@ -102,6 +102,7 @@ static void *ieee80211_tkip_init(int key_idx)
if (IS_ERR(priv->tx_tfm_michael)) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
"crypto API michael_mic\n");
+ priv->tx_tfm_michael = NULL;
goto fail;
}
@@ -110,6 +111,7 @@ static void *ieee80211_tkip_init(int key_idx)
if (IS_ERR(priv->rx_tfm_arc4)) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
"crypto API arc4\n");
+ priv->rx_tfm_arc4 = NULL;
goto fail;
}
@@ -118,7 +120,7 @@ static void *ieee80211_tkip_init(int key_idx)
if (IS_ERR(priv->rx_tfm_michael)) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
"crypto API michael_mic\n");
- priv->tfm_michael = NULL;
+ priv->rx_tfm_michael = NULL;
goto fail;
}
@@ -392,6 +394,19 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
return crypto_blkcipher_encrypt(&desc, &sg, &sg, len + 4);
}
+/*
+ * deal with seq counter wrapping correctly.
+ * refer to timer_after() for jiffies wrapping handling
+ */
+static inline int tkip_replay_check(u32 iv32_n, u16 iv16_n,
+ u32 iv32_o, u16 iv16_o)
+{
+ if ((s32)iv32_n - (s32)iv32_o < 0 ||
+ (iv32_n == iv32_o && iv16_n <= iv16_o))
+ return 1;
+ return 0;
+}
+
static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;