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Diffstat (limited to 'net/mac80211/wep.c')
-rw-r--r--net/mac80211/wep.c124
1 files changed, 90 insertions, 34 deletions
diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c
index 1ad3d75281c..6675261e958 100644
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -63,11 +63,11 @@ static inline int ieee80211_wep_weak_iv(u32 iv, int keylen)
}
-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->keylen))
+ if (ieee80211_wep_weak_iv(local->wep_iv, key->conf.keylen))
local->wep_iv += 0x0100;
if (!iv)
@@ -76,13 +76,13 @@ void ieee80211_wep_get_iv(struct ieee80211_local *local,
*iv++ = (local->wep_iv >> 16) & 0xff;
*iv++ = (local->wep_iv >> 8) & 0xff;
*iv++ = local->wep_iv & 0xff;
- *iv++ = key->keyidx << 6;
+ *iv++ = key->conf.keyidx << 6;
}
-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;
@@ -109,9 +109,9 @@ u8 * ieee80211_wep_add_iv(struct ieee80211_local *local,
}
-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;
@@ -159,10 +159,10 @@ int ieee80211_wep_encrypt(struct ieee80211_local *local, struct sk_buff *skb,
u8 *rc4key, *iv;
size_t len;
- if (!key || key->alg != ALG_WEP)
+ if (!key || key->conf.alg != ALG_WEP)
return -1;
- klen = 3 + key->keylen;
+ klen = 3 + key->conf.keylen;
rc4key = kmalloc(klen, GFP_ATOMIC);
if (!rc4key)
return -1;
@@ -179,7 +179,7 @@ int ieee80211_wep_encrypt(struct ieee80211_local *local, struct sk_buff *skb,
memcpy(rc4key, iv, 3);
/* Copy rest of the WEP key (the secret part) */
- memcpy(rc4key + 3, key->key, key->keylen);
+ memcpy(rc4key + 3, key->conf.key, key->conf.keylen);
/* Add room for ICV */
skb_put(skb, WEP_ICV_LEN);
@@ -251,10 +251,10 @@ int ieee80211_wep_decrypt(struct ieee80211_local *local, struct sk_buff *skb,
keyidx = skb->data[hdrlen + 3] >> 6;
- if (!key || keyidx != key->keyidx || key->alg != ALG_WEP)
+ if (!key || keyidx != key->conf.keyidx || key->conf.alg != ALG_WEP)
return -1;
- klen = 3 + key->keylen;
+ klen = 3 + key->conf.keylen;
rc4key = kmalloc(klen, GFP_ATOMIC);
if (!rc4key)
@@ -264,7 +264,7 @@ int ieee80211_wep_decrypt(struct ieee80211_local *local, struct sk_buff *skb,
memcpy(rc4key, skb->data + hdrlen, 3);
/* Copy rest of the WEP key (the secret part) */
- memcpy(rc4key + 3, key->key, key->keylen);
+ memcpy(rc4key + 3, key->conf.key, key->conf.keylen);
if (ieee80211_wep_decrypt_data(local->wep_rx_tfm, rc4key, klen,
skb->data + hdrlen + WEP_IV_LEN,
@@ -286,43 +286,99 @@ int ieee80211_wep_decrypt(struct ieee80211_local *local, struct sk_buff *skb,
}
-int ieee80211_wep_get_keyidx(struct sk_buff *skb)
+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;
+ u8 *ivpos;
+ u32 iv;
fc = le16_to_cpu(hdr->frame_control);
if (!(fc & IEEE80211_FCTL_PROTECTED))
- return -1;
+ return NULL;
hdrlen = ieee80211_get_hdrlen(fc);
+ ivpos = skb->data + hdrlen;
+ iv = (ivpos[0] << 16) | (ivpos[1] << 8) | ivpos[2];
- if (skb->len < 8 + hdrlen)
- return -1;
+ if (ieee80211_wep_weak_iv(iv, key->conf.keylen))
+ return ivpos;
- return skb->data[hdrlen + 3] >> 6;
+ return NULL;
}
+ieee80211_txrx_result
+ieee80211_crypto_wep_decrypt(struct ieee80211_txrx_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 TXRX_CONTINUE;
+
+ if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED)) {
+ if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) {
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
+ "failed\n", rx->dev->name);
+ return TXRX_DROP;
+ }
+ } else if (!(rx->u.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);
+ }
-u8 * ieee80211_wep_is_weak_iv(struct sk_buff *skb, struct ieee80211_key *key)
+ return TXRX_CONTINUE;
+}
+
+static int wep_encrypt_skb(struct ieee80211_txrx_data *tx, struct sk_buff *skb)
{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ if (!(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
+ if (ieee80211_wep_encrypt(tx->local, skb, tx->key))
+ return -1;
+ } else {
+ tx->u.tx.control->key_idx = tx->key->conf.hw_key_idx;
+ 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_txrx_result
+ieee80211_crypto_wep_encrypt(struct ieee80211_txrx_data *tx)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
u16 fc;
- int hdrlen;
- u8 *ivpos;
- u32 iv;
fc = le16_to_cpu(hdr->frame_control);
- if (!(fc & IEEE80211_FCTL_PROTECTED))
- return NULL;
- hdrlen = ieee80211_get_hdrlen(fc);
- ivpos = skb->data + hdrlen;
- iv = (ivpos[0] << 16) | (ivpos[1] << 8) | ivpos[2];
+ if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
+ ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
+ (fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)))
+ return TXRX_CONTINUE;
- if (ieee80211_wep_weak_iv(iv, key->keylen))
- return ivpos;
+ tx->u.tx.control->iv_len = WEP_IV_LEN;
+ tx->u.tx.control->icv_len = WEP_ICV_LEN;
+ ieee80211_tx_set_iswep(tx);
- return NULL;
+ if (wep_encrypt_skb(tx, tx->skb) < 0) {
+ I802_DEBUG_INC(tx->local->tx_handlers_drop_wep);
+ return TXRX_DROP;
+ }
+
+ if (tx->u.tx.extra_frag) {
+ int i;
+ for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
+ if (wep_encrypt_skb(tx, tx->u.tx.extra_frag[i]) < 0) {
+ I802_DEBUG_INC(tx->local->
+ tx_handlers_drop_wep);
+ return TXRX_DROP;
+ }
+ }
+ }
+
+ return TXRX_CONTINUE;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-13 07:47:43 +0000