#include <linux/crypto.h>
#include <linux/err.h>
#include <linux/mm.h>
-#include <asm/scatterlist.h>
+#include <linux/scatterlist.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
local->wep_tx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(local->wep_tx_tfm))
- return -ENOMEM;
+ return PTR_ERR(local->wep_tx_tfm);
local->wep_rx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(local->wep_rx_tfm)) {
crypto_free_blkcipher(local->wep_tx_tfm);
- return -ENOMEM;
+ return PTR_ERR(local->wep_rx_tfm);
}
return 0;
}
-void ieee80211_wep_get_iv(struct ieee80211_local *local,
- struct ieee80211_key *key, u8 *iv)
+static void ieee80211_wep_get_iv(struct ieee80211_local *local,
+ struct ieee80211_key *key, u8 *iv)
{
local->wep_iv++;
if (ieee80211_wep_weak_iv(local->wep_iv, key->conf.keylen))
}
-u8 * ieee80211_wep_add_iv(struct ieee80211_local *local,
- struct sk_buff *skb,
- struct ieee80211_key *key)
+static u8 *ieee80211_wep_add_iv(struct ieee80211_local *local,
+ struct sk_buff *skb,
+ struct ieee80211_key *key)
{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u16 fc;
- int hdrlen;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ unsigned int hdrlen;
u8 *newhdr;
- fc = le16_to_cpu(hdr->frame_control);
- fc |= IEEE80211_FCTL_PROTECTED;
- hdr->frame_control = cpu_to_le16(fc);
+ hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
- if ((skb_headroom(skb) < WEP_IV_LEN ||
- skb_tailroom(skb) < WEP_ICV_LEN)) {
- I802_DEBUG_INC(local->tx_expand_skb_head);
- if (unlikely(pskb_expand_head(skb, WEP_IV_LEN, WEP_ICV_LEN,
- GFP_ATOMIC)))
- return NULL;
- }
+ if (WARN_ON(skb_tailroom(skb) < WEP_ICV_LEN ||
+ skb_headroom(skb) < WEP_IV_LEN))
+ return NULL;
- hdrlen = ieee80211_get_hdrlen(fc);
+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
newhdr = skb_push(skb, WEP_IV_LEN);
memmove(newhdr, newhdr + WEP_IV_LEN, hdrlen);
ieee80211_wep_get_iv(local, key, newhdr + hdrlen);
}
-void ieee80211_wep_remove_iv(struct ieee80211_local *local,
- struct sk_buff *skb,
- struct ieee80211_key *key)
+static void ieee80211_wep_remove_iv(struct ieee80211_local *local,
+ struct sk_buff *skb,
+ struct ieee80211_key *key)
{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u16 fc;
- int hdrlen;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ unsigned int hdrlen;
- fc = le16_to_cpu(hdr->frame_control);
- hdrlen = ieee80211_get_hdrlen(fc);
+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
memmove(skb->data + WEP_IV_LEN, skb->data, hdrlen);
skb_pull(skb, WEP_IV_LEN);
}
*icv = cpu_to_le32(~crc32_le(~0, data, data_len));
crypto_blkcipher_setkey(tfm, rc4key, klen);
- sg.page = virt_to_page(data);
- sg.offset = offset_in_page(data);
- sg.length = data_len + WEP_ICV_LEN;
+ sg_init_one(&sg, data, data_len + WEP_ICV_LEN);
crypto_blkcipher_encrypt(&desc, &sg, &sg, sg.length);
}
__le32 crc;
crypto_blkcipher_setkey(tfm, rc4key, klen);
- sg.page = virt_to_page(data);
- sg.offset = offset_in_page(data);
- sg.length = data_len + WEP_ICV_LEN;
+ sg_init_one(&sg, data, data_len + WEP_ICV_LEN);
crypto_blkcipher_decrypt(&desc, &sg, &sg, sg.length);
crc = cpu_to_le32(~crc32_le(~0, data, data_len));
u32 klen;
u8 *rc4key;
u8 keyidx;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u16 fc;
- int hdrlen;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ unsigned int hdrlen;
size_t len;
int ret = 0;
- fc = le16_to_cpu(hdr->frame_control);
- if (!(fc & IEEE80211_FCTL_PROTECTED))
+ if (!ieee80211_has_protected(hdr->frame_control))
return -1;
- hdrlen = ieee80211_get_hdrlen(fc);
+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
if (skb->len < 8 + hdrlen)
return -1;
if (ieee80211_wep_decrypt_data(local->wep_rx_tfm, rc4key, klen,
skb->data + hdrlen + WEP_IV_LEN,
- len)) {
- printk(KERN_DEBUG "WEP decrypt failed (ICV)\n");
+ len))
ret = -1;
- }
kfree(rc4key);
}
-int ieee80211_wep_get_keyidx(struct sk_buff *skb)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u16 fc;
- int hdrlen;
-
- fc = le16_to_cpu(hdr->frame_control);
- if (!(fc & IEEE80211_FCTL_PROTECTED))
- return -1;
-
- hdrlen = ieee80211_get_hdrlen(fc);
-
- if (skb->len < 8 + hdrlen)
- return -1;
-
- return skb->data[hdrlen + 3] >> 6;
-}
-
-
u8 * ieee80211_wep_is_weak_iv(struct sk_buff *skb, struct ieee80211_key *key)
{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u16 fc;
- int hdrlen;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ unsigned int hdrlen;
u8 *ivpos;
u32 iv;
- fc = le16_to_cpu(hdr->frame_control);
- if (!(fc & IEEE80211_FCTL_PROTECTED))
+ if (!ieee80211_has_protected(hdr->frame_control))
return NULL;
- hdrlen = ieee80211_get_hdrlen(fc);
+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
ivpos = skb->data + hdrlen;
iv = (ivpos[0] << 16) | (ivpos[1] << 8) | ivpos[2];
return NULL;
}
+
+ieee80211_rx_result
+ieee80211_crypto_wep_decrypt(struct ieee80211_rx_data *rx)
+{
+ if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
+ ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
+ (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH))
+ return RX_CONTINUE;
+
+ if (!(rx->status->flag & RX_FLAG_DECRYPTED)) {
+ if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key))
+ return RX_DROP_UNUSABLE;
+ } else if (!(rx->status->flag & RX_FLAG_IV_STRIPPED)) {
+ ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);
+ /* remove ICV */
+ skb_trim(rx->skb, rx->skb->len - 4);
+ }
+
+ return RX_CONTINUE;
+}
+
+static int wep_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
+{
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+ info->control.iv_len = WEP_IV_LEN;
+ info->control.icv_len = WEP_ICV_LEN;
+
+ if (!(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
+ if (ieee80211_wep_encrypt(tx->local, skb, tx->key))
+ return -1;
+ } else {
+ info->control.hw_key = &tx->key->conf;
+ if (tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) {
+ if (!ieee80211_wep_add_iv(tx->local, skb, tx->key))
+ return -1;
+ }
+ }
+ return 0;
+}
+
+ieee80211_tx_result
+ieee80211_crypto_wep_encrypt(struct ieee80211_tx_data *tx)
+{
+ ieee80211_tx_set_protected(tx);
+
+ if (wep_encrypt_skb(tx, tx->skb) < 0) {
+ I802_DEBUG_INC(tx->local->tx_handlers_drop_wep);
+ return TX_DROP;
+ }
+
+ if (tx->extra_frag) {
+ int i;
+ for (i = 0; i < tx->num_extra_frag; i++) {
+ if (wep_encrypt_skb(tx, tx->extra_frag[i]) < 0) {
+ I802_DEBUG_INC(tx->local->
+ tx_handlers_drop_wep);
+ return TX_DROP;
+ }
+ }
+ }
+
+ return TX_CONTINUE;
+}
projects / linux-2.6-omap-h63xx.git / blobdiff