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path: root/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
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Diffstat (limited to 'drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c')
-rw-r--r--drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c76
1 files changed, 41 insertions, 35 deletions
diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
index 1f80c52a49c4..908bc2eb4d29 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
@@ -185,8 +185,7 @@ static inline u16 Mk16_le(u16 *v)
}
-static const u16 Sbox[256] =
-{
+static const u16 Sbox[256] = {
0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154,
0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A,
0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B,
@@ -257,8 +256,10 @@ static void tkip_mixing_phase1(u16 *TTAK, const u8 *TK, const u8 *TA, u32 IV32)
static void tkip_mixing_phase2(u8 *WEPSeed, const u8 *TK, const u16 *TTAK,
u16 IV16)
{
- /* Make temporary area overlap WEP seed so that the final copy can be
- * avoided on little endian hosts. */
+ /*
+ * Make temporary area overlap WEP seed so that the final copy can be
+ * avoided on little endian hosts.
+ */
u16 *PPK = (u16 *) &WEPSeed[4];
/* Step 1 - make copy of TTAK and bring in TSC */
@@ -284,8 +285,10 @@ static void tkip_mixing_phase2(u8 *WEPSeed, const u8 *TK, const u16 *TTAK,
PPK[4] += RotR1(PPK[3]);
PPK[5] += RotR1(PPK[4]);
- /* Step 3 - bring in last of TK bits, assign 24-bit WEP IV value
- * WEPSeed[0..2] is transmitted as WEP IV */
+ /*
+ * Step 3 - bring in last of TK bits, assign 24-bit WEP IV value
+ * WEPSeed[0..2] is transmitted as WEP IV
+ */
WEPSeed[0] = Hi8(IV16);
WEPSeed[1] = (Hi8(IV16) | 0x20) & 0x7F;
WEPSeed[2] = Lo8(IV16);
@@ -294,6 +297,7 @@ static void tkip_mixing_phase2(u8 *WEPSeed, const u8 *TK, const u16 *TTAK,
#ifdef __BIG_ENDIAN
{
int i;
+
for (i = 0; i < 6; i++)
PPK[i] = (PPK[i] << 8) | (PPK[i] >> 8);
}
@@ -304,7 +308,7 @@ static void tkip_mixing_phase2(u8 *WEPSeed, const u8 *TK, const u16 *TTAK,
static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
- int len;
+ int len;
u8 *pos;
struct rtl_80211_hdr_4addr *hdr;
cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
@@ -320,17 +324,15 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
hdr = (struct rtl_80211_hdr_4addr *) skb->data;
- if (!tcb_desc->bHwSec)
- {
+ if (!tcb_desc->bHwSec) {
if (!tkey->tx_phase1_done) {
tkip_mixing_phase1(tkey->tx_ttak, tkey->key, hdr->addr2,
- tkey->tx_iv32);
+ tkey->tx_iv32);
tkey->tx_phase1_done = 1;
}
tkip_mixing_phase2(rc4key, tkey->key, tkey->tx_ttak, tkey->tx_iv16);
- }
- else
- tkey->tx_phase1_done = 1;
+ } else
+ tkey->tx_phase1_done = 1;
len = skb->len - hdr_len;
@@ -338,14 +340,11 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
memmove(pos, pos + 8, hdr_len);
pos += hdr_len;
- if (tcb_desc->bHwSec)
- {
+ if (tcb_desc->bHwSec) {
*pos++ = Hi8(tkey->tx_iv16);
*pos++ = (Hi8(tkey->tx_iv16) | 0x20) & 0x7F;
*pos++ = Lo8(tkey->tx_iv16);
- }
- else
- {
+ } else {
*pos++ = rc4key[0];
*pos++ = rc4key[1];
*pos++ = rc4key[2];
@@ -357,8 +356,7 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
*pos++ = (tkey->tx_iv32 >> 16) & 0xff;
*pos++ = (tkey->tx_iv32 >> 24) & 0xff;
- if (!tcb_desc->bHwSec)
- {
+ if (!tcb_desc->bHwSec) {
icv = skb_put(skb, 4);
crc = ~crc32_le(~0, pos, len);
icv[0] = crc;
@@ -367,7 +365,7 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
icv[3] = crc >> 24;
crypto_blkcipher_setkey(tkey->tx_tfm_arc4, rc4key, 16);
sg_init_one(&sg, pos, len+4);
- ret= crypto_blkcipher_encrypt(&desc, &sg, &sg, len + 4);
+ ret = crypto_blkcipher_encrypt(&desc, &sg, &sg, len + 4);
}
tkey->tx_iv16++;
@@ -398,6 +396,7 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
u32 crc;
struct scatterlist sg;
int plen;
+
if (skb->len < hdr_len + 8 + 4)
return -1;
@@ -429,8 +428,7 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
iv32 = pos[4] | (pos[5] << 8) | (pos[6] << 16) | (pos[7] << 24);
pos += 8;
- if (!tcb_desc->bHwSec)
- {
+ if (!tcb_desc->bHwSec) {
if (iv32 < tkey->rx_iv32 ||
(iv32 == tkey->rx_iv32 && iv16 <= tkey->rx_iv16)) {
if (net_ratelimit()) {
@@ -471,8 +469,11 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
if (memcmp(icv, pos + plen, 4) != 0) {
if (iv32 != tkey->rx_iv32) {
- /* Previously cached Phase1 result was already lost, so
- * it needs to be recalculated for the next packet. */
+ /*
+ * Previously cached Phase1 result was already
+ * lost, so it needs to be recalculated for the
+ * next packet.
+ */
tkey->rx_phase1_done = 0;
}
if (net_ratelimit()) {
@@ -485,8 +486,10 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
}
- /* Update real counters only after Michael MIC verification has
- * completed */
+ /*
+ * Update real counters only after Michael MIC verification has
+ * completed.
+ */
tkey->rx_iv32_new = iv32;
tkey->rx_iv16_new = iv16;
@@ -571,9 +574,8 @@ static int ieee80211_michael_mic_add(struct sk_buff *skb, int hdr_len, void *pri
// { david, 2006.9.1
// fix the wpa process with wmm enabled.
- if(IEEE80211_QOS_HAS_SEQ(le16_to_cpu(hdr->frame_ctl))) {
+ if (IEEE80211_QOS_HAS_SEQ(le16_to_cpu(hdr->frame_ctl)))
tkey->tx_hdr[12] = *(skb->data + hdr_len - 2) & 0x07;
- }
// }
pos = skb_put(skb, 8);
@@ -606,7 +608,7 @@ static void ieee80211_michael_mic_failure(struct net_device *dev,
}
static int ieee80211_michael_mic_verify(struct sk_buff *skb, int keyidx,
- int hdr_len, void *priv)
+ int hdr_len, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
u8 mic[8];
@@ -620,17 +622,17 @@ static int ieee80211_michael_mic_verify(struct sk_buff *skb, int keyidx,
michael_mic_hdr(skb, tkey->rx_hdr);
// { david, 2006.9.1
// fix the wpa process with wmm enabled.
- if(IEEE80211_QOS_HAS_SEQ(le16_to_cpu(hdr->frame_ctl))) {
+ if (IEEE80211_QOS_HAS_SEQ(le16_to_cpu(hdr->frame_ctl)))
tkey->rx_hdr[12] = *(skb->data + hdr_len - 2) & 0x07;
- }
// }
if (michael_mic(tkey->rx_tfm_michael, &tkey->key[24], tkey->rx_hdr,
- skb->data + hdr_len, skb->len - 8 - hdr_len, mic))
+ skb->data + hdr_len, skb->len - 8 - hdr_len, mic))
return -1;
if (memcmp(mic, skb->data + skb->len - 8, 8) != 0) {
struct rtl_80211_hdr_4addr *hdr;
hdr = (struct rtl_80211_hdr_4addr *) skb->data;
+
printk(KERN_DEBUG "%s: Michael MIC verification failed for "
"MSDU from %pM keyidx=%d\n",
skb->dev ? skb->dev->name : "N/A", hdr->addr2,
@@ -641,8 +643,10 @@ static int ieee80211_michael_mic_verify(struct sk_buff *skb, int keyidx,
return -1;
}
- /* Update TSC counters for RX now that the packet verification has
- * completed. */
+ /*
+ * Update TSC counters for RX now that the packet verification has
+ * completed.
+ */
tkey->rx_iv32 = tkey->rx_iv32_new;
tkey->rx_iv16 = tkey->rx_iv16_new;
@@ -702,6 +706,7 @@ static int ieee80211_tkip_get_key(void *key, int len, u8 *seq, void *priv)
/* Return the sequence number of the last transmitted frame. */
u16 iv16 = tkey->tx_iv16;
u32 iv32 = tkey->tx_iv32;
+
if (iv16 == 0)
iv32--;
iv16--;
@@ -720,6 +725,7 @@ static int ieee80211_tkip_get_key(void *key, int len, u8 *seq, void *priv)
static char *ieee80211_tkip_print_stats(char *p, void *priv)
{
struct ieee80211_tkip_data *tkip = priv;
+
p += sprintf(p, "key[%d] alg=TKIP key_set=%d "
"tx_pn=%02x%02x%02x%02x%02x%02x "
"rx_pn=%02x%02x%02x%02x%02x%02x "
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