1 files changed, 22 insertions, 12 deletions

diff --git a/net/ieee80211/ieee80211_crypt_tkip.c b/net/ieee80211/ieee80211_crypt_tkip.c
index 34dba0ba545d..d60ce9b49b4f 100644
--- a/net/ieee80211/ieee80211_crypt_tkip.c
+++ b/net/ieee80211/ieee80211_crypt_tkip.c
@@ -9,6 +9,7 @@
  * more details.
  */
 
+#include <linux/err.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
@@ -52,7 +53,7 @@ struct ieee80211_tkip_data {
 
         int key_idx;
 
-        struct crypto_tfm *tfm_arc4;
+        struct crypto_blkcipher *tfm_arc4;
         struct crypto_tfm *tfm_michael;
 
         /* scratch buffers for virt_to_page() (crypto API) */
@@ -85,10 +86,12 @@ static void *ieee80211_tkip_init(int key_idx)
 
         priv->key_idx = key_idx;
 
-        priv->tfm_arc4 = crypto_alloc_tfm("arc4", 0);
-        if (priv->tfm_arc4 == NULL) {
+        priv->tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0,
+                                                CRYPTO_ALG_ASYNC);
+        if (IS_ERR(priv->tfm_arc4)) {
                 printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
                        "crypto API arc4\n");
+                priv->tfm_arc4 = NULL;
                 goto fail;
         }
 
@@ -106,7 +109,7 @@ static void *ieee80211_tkip_init(int key_idx)
                 if (priv->tfm_michael)
                         crypto_free_tfm(priv->tfm_michael);
                 if (priv->tfm_arc4)
-                        crypto_free_tfm(priv->tfm_arc4);
+                        crypto_free_blkcipher(priv->tfm_arc4);
                 kfree(priv);
         }
 
@@ -119,7 +122,7 @@ static void ieee80211_tkip_deinit(void *priv)
         if (_priv && _priv->tfm_michael)
                 crypto_free_tfm(_priv->tfm_michael);
         if (_priv && _priv->tfm_arc4)
-                crypto_free_tfm(_priv->tfm_arc4);
+                crypto_free_blkcipher(_priv->tfm_arc4);
         kfree(priv);
 }
 
@@ -318,6 +321,7 @@ static int ieee80211_tkip_hdr(struct sk_buff *skb, int hdr_len,
 static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
 {
         struct ieee80211_tkip_data *tkey = priv;
+        struct blkcipher_desc desc = { .tfm = tkey->tfm_arc4 };
         int len;
         u8 rc4key[16], *pos, *icv;
         u32 crc;
@@ -351,18 +355,17 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
         icv[2] = crc >> 16;
         icv[3] = crc >> 24;
 
-        crypto_cipher_setkey(tkey->tfm_arc4, rc4key, 16);
+        crypto_blkcipher_setkey(tkey->tfm_arc4, rc4key, 16);
         sg.page = virt_to_page(pos);
         sg.offset = offset_in_page(pos);
         sg.length = len + 4;
-        crypto_cipher_encrypt(tkey->tfm_arc4, &sg, &sg, len + 4);
-
-        return 0;
+        return crypto_blkcipher_encrypt(&desc, &sg, &sg, len + 4);
 }
 
 static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
 {
         struct ieee80211_tkip_data *tkey = priv;
+        struct blkcipher_desc desc = { .tfm = tkey->tfm_arc4 };
         u8 rc4key[16];
         u8 keyidx, *pos;
         u32 iv32;
@@ -434,11 +437,18 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
 
         plen = skb->len - hdr_len - 12;
 
-        crypto_cipher_setkey(tkey->tfm_arc4, rc4key, 16);
+        crypto_blkcipher_setkey(tkey->tfm_arc4, rc4key, 16);
         sg.page = virt_to_page(pos);
         sg.offset = offset_in_page(pos);
         sg.length = plen + 4;
-        crypto_cipher_decrypt(tkey->tfm_arc4, &sg, &sg, plen + 4);
+        if (crypto_blkcipher_decrypt(&desc, &sg, &sg, plen + 4)) {
+                if (net_ratelimit()) {
+                        printk(KERN_DEBUG ": TKIP: failed to decrypt "
+                               "received packet from " MAC_FMT "\n",
+                               MAC_ARG(hdr->addr2));
+                }
+                return -7;
+        }
 
         crc = ~crc32_le(~0, pos, plen);
         icv[0] = crc;
@@ -619,7 +629,7 @@ static int ieee80211_tkip_set_key(void *key, int len, u8 * seq, void *priv)
         struct ieee80211_tkip_data *tkey = priv;
         int keyidx;
         struct crypto_tfm *tfm = tkey->tfm_michael;
-        struct crypto_tfm *tfm2 = tkey->tfm_arc4;
+        struct crypto_blkcipher *tfm2 = tkey->tfm_arc4;
 
         keyidx = tkey->key_idx;
         memset(tkey, 0, sizeof(*tkey));