[PATCH] Update my email address from jkmaline@cc.hut.fi to j@w1.fi

[powerpc.git] / net / ieee80211 / ieee80211_crypt_wep.c

diff --git a/net/ieee80211/ieee80211_crypt_wep.c b/net/ieee80211/ieee80211_crypt_wep.c
index 3d46d3e..8d18245 100644 (file)
--- a/net/ieee80211/ieee80211_crypt_wep.c
+++ b/net/ieee80211/ieee80211_crypt_wep.c
@@ -1,7 +1,7 @@
 /*
  * Host AP crypt: host-based WEP encryption implementation for Host AP driver
  *
- * Copyright (c) 2002-2004, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright (c) 2002-2004, Jouni Malinen <j@w1.fi>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -15,6 +15,7 @@
 #include <linux/slab.h>
 #include <linux/random.h>
 #include <linux/skbuff.h>
+#include <linux/mm.h>
 #include <asm/string.h>
 
 #include <net/ieee80211.h>
@@ -33,7 +34,8 @@ 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 +47,21 @@ 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 +69,10 @@ 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 +81,12 @@ 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);
 }
 
@@ -82,7 +97,7 @@ static int prism2_wep_build_iv(struct sk_buff *skb, int hdr_len,
        struct prism2_wep_data *wep = priv;
        u32 klen, len;
        u8 *pos;
-       
+
        if (skb_headroom(skb) < 4 || skb->len < hdr_len)
                return -1;
 
@@ -122,7 +137,7 @@ 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;
@@ -131,17 +146,17 @@ static int prism2_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
        /* other checks are in prism2_wep_build_iv */
        if (skb_tailroom(skb) < 4)
                return -1;
-       
+
        /* add the IV to the frame */
        if (prism2_wep_build_iv(skb, hdr_len, NULL, 0, priv))
                return -1;
-       
+
        /* Copy the IV into the first 3 bytes of the key */
-       memcpy(key, skb->data + hdr_len, 3);
+       skb_copy_from_linear_data_offset(skb, hdr_len, key, 3);
 
        /* Copy rest of the WEP key (the secret part) */
        memcpy(key + 3, wep->key, wep->key_len);
-       
+
        len = skb->len - hdr_len - 4;
        pos = skb->data + hdr_len + 4;
        klen = 3 + wep->key_len;
@@ -154,7 +169,7 @@ 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 +186,7 @@ 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 +211,7 @@ 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;