1 files changed, 26 insertions, 12 deletions

diff --git a/net/ieee80211/ieee80211_crypt_wep.c b/net/ieee80211/ieee80211_crypt_wep.c
index 3d46d3e..1b2efff 100644
--- a/net/ieee80211/ieee80211_crypt_wep.c
+++ b/net/ieee80211/ieee80211_crypt_wep.c
@@ -33,7 +33,8 @@ struct prism2_wep_data {
 	u8 key[WEP_KEY_LEN + 1];
 	u8 key_len;
 	u8 key_idx;
-	struct crypto_blkcipher *tfm;
+	struct crypto_blkcipher *tx_tfm;
+	struct crypto_blkcipher *rx_tfm;
 };
 
 static void *prism2_wep_init(int keyidx)
@@ -45,14 +46,21 @@ static void *prism2_wep_init(int keyidx)
 		goto fail;
 	priv->key_idx = keyidx;
 
-	priv->tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
-	if (IS_ERR(priv->tfm)) {
+	priv->tx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
+	if (IS_ERR(priv->tx_tfm)) {
 		printk(KERN_DEBUG "ieee80211_crypt_wep: could not allocate "
 		       "crypto API arc4\n");
-		priv->tfm = NULL;
+		priv->tx_tfm = NULL;
 		goto fail;
 	}
 
+	priv->rx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
+	if (IS_ERR(priv->rx_tfm)) {
+		printk(KERN_DEBUG "ieee80211_crypt_wep: could not allocate "
+		       "crypto API arc4\n");
+		priv->rx_tfm = NULL;
+		goto fail;
+	}
 	/* start WEP IV from a random value */
 	get_random_bytes(&priv->iv, 4);
 
@@ -60,8 +68,10 @@ static void *prism2_wep_init(int keyidx)
 
       fail:
 	if (priv) {
-		if (priv->tfm)
-			crypto_free_blkcipher(priv->tfm);
+		if (priv->tx_tfm)
+			crypto_free_blkcipher(priv->tx_tfm);
+		if (priv->rx_tfm)
+			crypto_free_blkcipher(priv->rx_tfm);
 		kfree(priv);
 	}
 	return NULL;
@@ -70,8 +80,12 @@ static void *prism2_wep_init(int keyidx)
 static void prism2_wep_deinit(void *priv)
 {
 	struct prism2_wep_data *_priv = priv;
-	if (_priv && _priv->tfm)
-		crypto_free_blkcipher(_priv->tfm);
+	if (_priv) {
+		if (_priv->tx_tfm)
+			crypto_free_blkcipher(_priv->tx_tfm);
+		if (_priv->rx_tfm)
+			crypto_free_blkcipher(_priv->rx_tfm);
+	}
 	kfree(priv);
 }
 
@@ -122,7 +136,7 @@ static int prism2_wep_build_iv(struct sk_buff *skb, int hdr_len,
 static int prism2_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
 {
 	struct prism2_wep_data *wep = priv;
-	struct blkcipher_desc desc = { .tfm = wep->tfm };
+	struct blkcipher_desc desc = { .tfm = wep->tx_tfm };
 	u32 crc, klen, len;
 	u8 *pos, *icv;
 	struct scatterlist sg;
@@ -154,7 +168,7 @@ static int prism2_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
 	icv[2] = crc >> 16;
 	icv[3] = crc >> 24;
 
-	crypto_blkcipher_setkey(wep->tfm, key, klen);
+	crypto_blkcipher_setkey(wep->tx_tfm, key, klen);
 	sg.page = virt_to_page(pos);
 	sg.offset = offset_in_page(pos);
 	sg.length = len + 4;
@@ -171,7 +185,7 @@ static int prism2_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
 static int prism2_wep_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
 {
 	struct prism2_wep_data *wep = priv;
-	struct blkcipher_desc desc = { .tfm = wep->tfm };
+	struct blkcipher_desc desc = { .tfm = wep->rx_tfm };
 	u32 crc, klen, plen;
 	u8 key[WEP_KEY_LEN + 3];
 	u8 keyidx, *pos, icv[4];
@@ -196,7 +210,7 @@ static int prism2_wep_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
 	/* Apply RC4 to data and compute CRC32 over decrypted data */
 	plen = skb->len - hdr_len - 8;
 
-	crypto_blkcipher_setkey(wep->tfm, key, klen);
+	crypto_blkcipher_setkey(wep->rx_tfm, key, klen);
 	sg.page = virt_to_page(pos);
 	sg.offset = offset_in_page(pos);
 	sg.length = plen + 4;