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path: root/net/ieee80211/ieee80211_crypt_tkip.c
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Diffstat (limited to 'net/ieee80211/ieee80211_crypt_tkip.c')
-rw-r--r--net/ieee80211/ieee80211_crypt_tkip.c133
1 files changed, 54 insertions, 79 deletions
diff --git a/net/ieee80211/ieee80211_crypt_tkip.c b/net/ieee80211/ieee80211_crypt_tkip.c
index f91d92c6df25..d4f9164be1a1 100644
--- a/net/ieee80211/ieee80211_crypt_tkip.c
+++ b/net/ieee80211/ieee80211_crypt_tkip.c
@@ -23,7 +23,6 @@
#include <net/ieee80211.h>
-
#include <linux/crypto.h>
#include <asm/scatterlist.h>
#include <linux/crc32.h>
@@ -62,7 +61,7 @@ struct ieee80211_tkip_data {
u8 rx_hdr[16], tx_hdr[16];
};
-static void * ieee80211_tkip_init(int key_idx)
+static void *ieee80211_tkip_init(int key_idx)
{
struct ieee80211_tkip_data *priv;
@@ -88,7 +87,7 @@ static void * ieee80211_tkip_init(int key_idx)
return priv;
-fail:
+ fail:
if (priv) {
if (priv->tfm_michael)
crypto_free_tfm(priv->tfm_michael);
@@ -100,7 +99,6 @@ fail:
return NULL;
}
-
static void ieee80211_tkip_deinit(void *priv)
{
struct ieee80211_tkip_data *_priv = priv;
@@ -111,51 +109,42 @@ static void ieee80211_tkip_deinit(void *priv)
kfree(priv);
}
-
static inline u16 RotR1(u16 val)
{
return (val >> 1) | (val << 15);
}
-
static inline u8 Lo8(u16 val)
{
return val & 0xff;
}
-
static inline u8 Hi8(u16 val)
{
return val >> 8;
}
-
static inline u16 Lo16(u32 val)
{
return val & 0xffff;
}
-
static inline u16 Hi16(u32 val)
{
return val >> 16;
}
-
static inline u16 Mk16(u8 hi, u8 lo)
{
return lo | (((u16) hi) << 8);
}
-
-static inline u16 Mk16_le(u16 *v)
+static inline u16 Mk16_le(u16 * v)
{
return le16_to_cpu(*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,
@@ -190,17 +179,16 @@ static const u16 Sbox[256] =
0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A,
};
-
static inline u16 _S_(u16 v)
{
u16 t = Sbox[Hi8(v)];
return Sbox[Lo8(v)] ^ ((t << 8) | (t >> 8));
}
-
#define PHASE1_LOOP_COUNT 8
-static void tkip_mixing_phase1(u16 *TTAK, const u8 *TK, const u8 *TA, u32 IV32)
+static void tkip_mixing_phase1(u16 * TTAK, const u8 * TK, const u8 * TA,
+ u32 IV32)
{
int i, j;
@@ -221,13 +209,12 @@ 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,
+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. */
- u16 *PPK = (u16 *) &WEPSeed[4];
+ u16 *PPK = (u16 *) & WEPSeed[4];
/* Step 1 - make copy of TTAK and bring in TSC */
PPK[0] = TTAK[0];
@@ -238,15 +225,15 @@ static void tkip_mixing_phase2(u8 *WEPSeed, const u8 *TK, const u16 *TTAK,
PPK[5] = TTAK[4] + IV16;
/* Step 2 - 96-bit bijective mixing using S-box */
- PPK[0] += _S_(PPK[5] ^ Mk16_le((u16 *) &TK[0]));
- PPK[1] += _S_(PPK[0] ^ Mk16_le((u16 *) &TK[2]));
- PPK[2] += _S_(PPK[1] ^ Mk16_le((u16 *) &TK[4]));
- PPK[3] += _S_(PPK[2] ^ Mk16_le((u16 *) &TK[6]));
- PPK[4] += _S_(PPK[3] ^ Mk16_le((u16 *) &TK[8]));
- PPK[5] += _S_(PPK[4] ^ Mk16_le((u16 *) &TK[10]));
-
- PPK[0] += RotR1(PPK[5] ^ Mk16_le((u16 *) &TK[12]));
- PPK[1] += RotR1(PPK[0] ^ Mk16_le((u16 *) &TK[14]));
+ PPK[0] += _S_(PPK[5] ^ Mk16_le((u16 *) & TK[0]));
+ PPK[1] += _S_(PPK[0] ^ Mk16_le((u16 *) & TK[2]));
+ PPK[2] += _S_(PPK[1] ^ Mk16_le((u16 *) & TK[4]));
+ PPK[3] += _S_(PPK[2] ^ Mk16_le((u16 *) & TK[6]));
+ PPK[4] += _S_(PPK[3] ^ Mk16_le((u16 *) & TK[8]));
+ PPK[5] += _S_(PPK[4] ^ Mk16_le((u16 *) & TK[10]));
+
+ PPK[0] += RotR1(PPK[5] ^ Mk16_le((u16 *) & TK[12]));
+ PPK[1] += RotR1(PPK[0] ^ Mk16_le((u16 *) & TK[14]));
PPK[2] += RotR1(PPK[1]);
PPK[3] += RotR1(PPK[2]);
PPK[4] += RotR1(PPK[3]);
@@ -257,7 +244,7 @@ static void tkip_mixing_phase2(u8 *WEPSeed, const u8 *TK, const u16 *TTAK,
WEPSeed[0] = Hi8(IV16);
WEPSeed[1] = (Hi8(IV16) | 0x20) & 0x7F;
WEPSeed[2] = Lo8(IV16);
- WEPSeed[3] = Lo8((PPK[5] ^ Mk16_le((u16 *) &TK[0])) >> 1);
+ WEPSeed[3] = Lo8((PPK[5] ^ Mk16_le((u16 *) & TK[0])) >> 1);
#ifdef __BIG_ENDIAN
{
@@ -281,7 +268,7 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
skb->len < hdr_len)
return -1;
- hdr = (struct ieee80211_hdr *) skb->data;
+ hdr = (struct ieee80211_hdr *)skb->data;
if (!tkey->tx_phase1_done) {
tkip_mixing_phase1(tkey->tx_ttak, tkey->key, hdr->addr2,
tkey->tx_iv32);
@@ -298,7 +285,7 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
*pos++ = rc4key[0];
*pos++ = rc4key[1];
*pos++ = rc4key[2];
- *pos++ = (tkey->key_idx << 6) | (1 << 5) /* Ext IV included */;
+ *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;
@@ -341,7 +328,7 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
if (skb->len < hdr_len + 8 + 4)
return -1;
- hdr = (struct ieee80211_hdr *) skb->data;
+ hdr = (struct ieee80211_hdr *)skb->data;
pos = skb->data + hdr_len;
keyidx = pos[3];
if (!(keyidx & (1 << 5))) {
@@ -427,9 +414,8 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
return keyidx;
}
-
-static int michael_mic(struct ieee80211_tkip_data *tkey, u8 *key, u8 *hdr,
- u8 *data, size_t data_len, u8 *mic)
+static int michael_mic(struct ieee80211_tkip_data *tkey, u8 * key, u8 * hdr,
+ u8 * data, size_t data_len, u8 * mic)
{
struct scatterlist sg[2];
@@ -453,37 +439,37 @@ static int michael_mic(struct ieee80211_tkip_data *tkey, u8 *key, u8 *hdr,
return 0;
}
-static void michael_mic_hdr(struct sk_buff *skb, u8 *hdr)
+static void michael_mic_hdr(struct sk_buff *skb, u8 * hdr)
{
struct ieee80211_hdr *hdr11;
- hdr11 = (struct ieee80211_hdr *) skb->data;
+ hdr11 = (struct ieee80211_hdr *)skb->data;
switch (le16_to_cpu(hdr11->frame_ctl) &
(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
case IEEE80211_FCTL_TODS:
- memcpy(hdr, hdr11->addr3, ETH_ALEN); /* DA */
- memcpy(hdr + ETH_ALEN, hdr11->addr2, ETH_ALEN); /* SA */
+ memcpy(hdr, hdr11->addr3, ETH_ALEN); /* DA */
+ memcpy(hdr + ETH_ALEN, hdr11->addr2, ETH_ALEN); /* SA */
break;
case IEEE80211_FCTL_FROMDS:
- memcpy(hdr, hdr11->addr1, ETH_ALEN); /* DA */
- memcpy(hdr + ETH_ALEN, hdr11->addr3, ETH_ALEN); /* SA */
+ memcpy(hdr, hdr11->addr1, ETH_ALEN); /* DA */
+ memcpy(hdr + ETH_ALEN, hdr11->addr3, ETH_ALEN); /* SA */
break;
case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
- memcpy(hdr, hdr11->addr3, ETH_ALEN); /* DA */
- memcpy(hdr + ETH_ALEN, hdr11->addr4, ETH_ALEN); /* SA */
+ memcpy(hdr, hdr11->addr3, ETH_ALEN); /* DA */
+ memcpy(hdr + ETH_ALEN, hdr11->addr4, ETH_ALEN); /* SA */
break;
case 0:
- memcpy(hdr, hdr11->addr1, ETH_ALEN); /* DA */
- memcpy(hdr + ETH_ALEN, hdr11->addr2, ETH_ALEN); /* SA */
+ memcpy(hdr, hdr11->addr1, ETH_ALEN); /* DA */
+ memcpy(hdr + ETH_ALEN, hdr11->addr2, ETH_ALEN); /* SA */
break;
}
- hdr[12] = 0; /* priority */
- hdr[13] = hdr[14] = hdr[15] = 0; /* reserved */
+ hdr[12] = 0; /* priority */
+ hdr[13] = hdr[14] = hdr[15] = 0; /* reserved */
}
-
-static int ieee80211_michael_mic_add(struct sk_buff *skb, int hdr_len, void *priv)
+static int ieee80211_michael_mic_add(struct sk_buff *skb, int hdr_len,
+ void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
u8 *pos;
@@ -504,11 +490,9 @@ static int ieee80211_michael_mic_add(struct sk_buff *skb, int hdr_len, void *pri
return 0;
}
-
#if WIRELESS_EXT >= 18
static void ieee80211_michael_mic_failure(struct net_device *dev,
- struct ieee80211_hdr *hdr,
- int keyidx)
+ struct ieee80211_hdr *hdr, int keyidx)
{
union iwreq_data wrqu;
struct iw_michaelmicfailure ev;
@@ -524,12 +508,11 @@ static void ieee80211_michael_mic_failure(struct net_device *dev,
memcpy(ev.src_addr.sa_data, hdr->addr2, ETH_ALEN);
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = sizeof(ev);
- wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu, (char *) &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 *hdr,
- int keyidx)
+ struct ieee80211_hdr *hdr, int keyidx)
{
union iwreq_data wrqu;
char buf[128];
@@ -542,17 +525,16 @@ static void ieee80211_michael_mic_failure(struct net_device *dev,
wrqu.data.length = strlen(buf);
wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
}
-#else /* WIRELESS_EXT >= 15 */
+#else /* WIRELESS_EXT >= 15 */
static inline void ieee80211_michael_mic_failure(struct net_device *dev,
- struct ieee80211_hdr *hdr,
- int keyidx)
+ struct ieee80211_hdr *hdr,
+ int keyidx)
{
}
-#endif /* WIRELESS_EXT >= 15 */
-
+#endif /* WIRELESS_EXT >= 15 */
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];
@@ -566,7 +548,7 @@ static int ieee80211_michael_mic_verify(struct sk_buff *skb, int keyidx,
return -1;
if (memcmp(mic, skb->data + skb->len - 8, 8) != 0) {
struct ieee80211_hdr *hdr;
- hdr = (struct ieee80211_hdr *) skb->data;
+ hdr = (struct ieee80211_hdr *)skb->data;
printk(KERN_DEBUG "%s: Michael MIC verification failed for "
"MSDU from " MAC_FMT " keyidx=%d\n",
skb->dev ? skb->dev->name : "N/A", MAC_ARG(hdr->addr2),
@@ -587,8 +569,7 @@ static int ieee80211_michael_mic_verify(struct sk_buff *skb, int keyidx,
return 0;
}
-
-static int ieee80211_tkip_set_key(void *key, int len, u8 *seq, void *priv)
+static int ieee80211_tkip_set_key(void *key, int len, u8 * seq, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
int keyidx;
@@ -603,10 +584,10 @@ static int ieee80211_tkip_set_key(void *key, int len, u8 *seq, void *priv)
if (len == TKIP_KEY_LEN) {
memcpy(tkey->key, key, TKIP_KEY_LEN);
tkey->key_set = 1;
- tkey->tx_iv16 = 1; /* TSC is initialized to 1 */
+ tkey->tx_iv16 = 1; /* TSC is initialized to 1 */
if (seq) {
tkey->rx_iv32 = (seq[5] << 24) | (seq[4] << 16) |
- (seq[3] << 8) | seq[2];
+ (seq[3] << 8) | seq[2];
tkey->rx_iv16 = (seq[1] << 8) | seq[0];
}
} else if (len == 0)
@@ -617,8 +598,7 @@ static int ieee80211_tkip_set_key(void *key, int len, u8 *seq, void *priv)
return 0;
}
-
-static int ieee80211_tkip_get_key(void *key, int len, u8 *seq, void *priv)
+static int ieee80211_tkip_get_key(void *key, int len, u8 * seq, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
@@ -647,8 +627,7 @@ static int ieee80211_tkip_get_key(void *key, int len, u8 *seq, void *priv)
return TKIP_KEY_LEN;
}
-
-static char * ieee80211_tkip_print_stats(char *p, 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 "
@@ -674,7 +653,6 @@ static char * ieee80211_tkip_print_stats(char *p, void *priv)
return p;
}
-
static struct ieee80211_crypto_ops ieee80211_crypt_tkip = {
.name = "TKIP",
.init = ieee80211_tkip_init,
@@ -686,23 +664,20 @@ static struct ieee80211_crypto_ops ieee80211_crypt_tkip = {
.set_key = ieee80211_tkip_set_key,
.get_key = ieee80211_tkip_get_key,
.print_stats = ieee80211_tkip_print_stats,
- .extra_prefix_len = 4 + 4, /* IV + ExtIV */
- .extra_postfix_len = 8 + 4, /* MIC + ICV */
- .owner = THIS_MODULE,
+ .extra_prefix_len = 4 + 4, /* IV + ExtIV */
+ .extra_postfix_len = 8 + 4, /* MIC + ICV */
+ .owner = THIS_MODULE,
};
-
static int __init ieee80211_crypto_tkip_init(void)
{
return ieee80211_register_crypto_ops(&ieee80211_crypt_tkip);
}
-
static void __exit ieee80211_crypto_tkip_exit(void)
{
ieee80211_unregister_crypto_ops(&ieee80211_crypt_tkip);
}
-
module_init(ieee80211_crypto_tkip_init);
module_exit(ieee80211_crypto_tkip_exit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-26 21:17:37 +0000