*/
#include <linux/config.h>
-#include <linux/version.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
/* scratch buffers for virt_to_page() (crypto API) */
u8 rx_hdr[16], tx_hdr[16];
- struct ieee80211_device *ieee;
+ unsigned long flags;
};
-static void *ieee80211_tkip_init(struct ieee80211_device *ieee, int key_idx)
+static unsigned long ieee80211_tkip_set_flags(unsigned long flags, void *priv)
+{
+ struct ieee80211_tkip_data *_priv = priv;
+ unsigned long old_flags = _priv->flags;
+ _priv->flags = flags;
+ return old_flags;
+}
+
+static unsigned long ieee80211_tkip_get_flags(void *priv)
+{
+ struct ieee80211_tkip_data *_priv = priv;
+ return _priv->flags;
+}
+
+static void *ieee80211_tkip_init(int key_idx)
{
struct ieee80211_tkip_data *priv;
- priv = kmalloc(sizeof(*priv), GFP_ATOMIC);
+ priv = kzalloc(sizeof(*priv), GFP_ATOMIC);
if (priv == NULL)
goto fail;
- memset(priv, 0, sizeof(*priv));
-
- priv->ieee = ieee;
priv->key_idx = key_idx;
#endif
}
-static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
+static int ieee80211_tkip_hdr(struct sk_buff *skb, int hdr_len,
+ u8 * rc4key, int keylen, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
int len;
- u8 rc4key[16], *pos, *icv;
+ u8 *pos;
struct ieee80211_hdr_4addr *hdr;
- u32 crc;
- struct scatterlist sg;
hdr = (struct ieee80211_hdr_4addr *)skb->data;
- if (tkey->ieee->tkip_countermeasures) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
- "TX packet to " MAC_FMT "\n",
- tkey->ieee->dev->name, MAC_ARG(hdr->addr1));
- }
+ if (skb_headroom(skb) < 8 || skb->len < hdr_len)
return -1;
- }
- if (skb_headroom(skb) < 8 || skb_tailroom(skb) < 4 ||
- skb->len < hdr_len)
+ if (rc4key == NULL || keylen < 16)
return -1;
if (!tkey->tx_phase1_done) {
pos = skb_push(skb, 8);
memmove(pos, pos + 8, hdr_len);
pos += hdr_len;
- icv = skb_put(skb, 4);
- *pos++ = rc4key[0];
- *pos++ = rc4key[1];
- *pos++ = rc4key[2];
+ *pos++ = *rc4key;
+ *pos++ = *(rc4key + 1);
+ *pos++ = *(rc4key + 2);
*pos++ = (tkey->key_idx << 6) | (1 << 5) /* Ext IV included */ ;
*pos++ = tkey->tx_iv32 & 0xff;
*pos++ = (tkey->tx_iv32 >> 8) & 0xff;
*pos++ = (tkey->tx_iv32 >> 16) & 0xff;
*pos++ = (tkey->tx_iv32 >> 24) & 0xff;
+ tkey->tx_iv16++;
+ if (tkey->tx_iv16 == 0) {
+ tkey->tx_phase1_done = 0;
+ tkey->tx_iv32++;
+ }
+
+ return 8;
+}
+
+static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
+{
+ struct ieee80211_tkip_data *tkey = priv;
+ int len;
+ u8 rc4key[16], *pos, *icv;
+ u32 crc;
+ struct scatterlist sg;
+
+ if (tkey->flags & IEEE80211_CRYPTO_TKIP_COUNTERMEASURES) {
+ if (net_ratelimit()) {
+ struct ieee80211_hdr_4addr *hdr =
+ (struct ieee80211_hdr_4addr *)skb->data;
+ printk(KERN_DEBUG ": TKIP countermeasures: dropped "
+ "TX packet to " MAC_FMT "\n",
+ MAC_ARG(hdr->addr1));
+ }
+ return -1;
+ }
+
+ if (skb_tailroom(skb) < 4 || skb->len < hdr_len)
+ return -1;
+
+ len = skb->len - hdr_len;
+ pos = skb->data + hdr_len;
+
+ if ((ieee80211_tkip_hdr(skb, hdr_len, rc4key, 16, priv)) < 0)
+ return -1;
+
+ icv = skb_put(skb, 4);
+
crc = ~crc32_le(~0, pos, len);
icv[0] = crc;
icv[1] = crc >> 8;
sg.length = len + 4;
crypto_cipher_encrypt(tkey->tfm_arc4, &sg, &sg, len + 4);
- tkey->tx_iv16++;
- if (tkey->tx_iv16 == 0) {
- tkey->tx_phase1_done = 0;
- tkey->tx_iv32++;
- }
-
return 0;
}
hdr = (struct ieee80211_hdr_4addr *)skb->data;
- if (tkey->ieee->tkip_countermeasures) {
+ if (tkey->flags & IEEE80211_CRYPTO_TKIP_COUNTERMEASURES) {
if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
+ printk(KERN_DEBUG ": TKIP countermeasures: dropped "
"received packet from " MAC_FMT "\n",
- tkey->ieee->dev->name, MAC_ARG(hdr->addr2));
+ MAC_ARG(hdr->addr2));
}
return -1;
}
return 0;
}
-#if WIRELESS_EXT >= 18
static void ieee80211_michael_mic_failure(struct net_device *dev,
struct ieee80211_hdr_4addr *hdr,
int keyidx)
wrqu.data.length = sizeof(ev);
wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu, (char *)&ev);
}
-#elif WIRELESS_EXT >= 15
-static void ieee80211_michael_mic_failure(struct net_device *dev,
- struct ieee80211_hdr_4addr *hdr,
- int keyidx)
-{
- union iwreq_data wrqu;
- char buf[128];
-
- /* TODO: needed parameters: count, keyid, key type, TSC */
- sprintf(buf, "MLME-MICHAELMICFAILURE.indication(keyid=%d %scast addr="
- MAC_FMT ")", keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni",
- MAC_ARG(hdr->addr2));
- memset(&wrqu, 0, sizeof(wrqu));
- wrqu.data.length = strlen(buf);
- wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
-}
-#else /* WIRELESS_EXT >= 15 */
-static inline void ieee80211_michael_mic_failure(struct net_device *dev, struct ieee80211_hdr_4addr
- *hdr, int keyidx)
-{
-}
-#endif /* WIRELESS_EXT >= 15 */
static int ieee80211_michael_mic_verify(struct sk_buff *skb, int keyidx,
int hdr_len, void *priv)
.name = "TKIP",
.init = ieee80211_tkip_init,
.deinit = ieee80211_tkip_deinit,
+ .build_iv = ieee80211_tkip_hdr,
.encrypt_mpdu = ieee80211_tkip_encrypt,
.decrypt_mpdu = ieee80211_tkip_decrypt,
.encrypt_msdu = ieee80211_michael_mic_add,
.extra_mpdu_prefix_len = 4 + 4, /* IV + ExtIV */
.extra_mpdu_postfix_len = 4, /* ICV */
.extra_msdu_postfix_len = 8, /* MIC */
+ .get_flags = ieee80211_tkip_get_flags,
+ .set_flags = ieee80211_tkip_set_flags,
.owner = THIS_MODULE,
};
projects / powerpc.git / blobdiff