forked from luck/tmp_suning_uos_patched
staging/rtl8192u: switch to RC4 library interface
Switch to the ARC4 library interface, to remove the pointless dependency on the skcipher API, from which we will hopefully be able to drop ecb(arc4) skcipher support. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel
Herbert Xu
parent
054694a46d
commit
c596077848
|
|
@ -8,3 +8,4 @@ config RTL8192U
|
|||
select CRYPTO
|
||||
select CRYPTO_AES
|
||||
select CRYPTO_CCM
|
||||
select CRYPTO_LIB_ARC4
|
||||
|
|
|
|||
|
|
@ -5,6 +5,7 @@
|
|||
* Copyright (c) 2003-2004, Jouni Malinen <jkmaline@cc.hut.fi>
|
||||
*/
|
||||
|
||||
#include <linux/fips.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/slab.h>
|
||||
|
|
@ -17,9 +18,8 @@
|
|||
|
||||
#include "ieee80211.h"
|
||||
|
||||
#include <crypto/arc4.h>
|
||||
#include <crypto/hash.h>
|
||||
#include <crypto/skcipher.h>
|
||||
#include <linux/scatterlist.h>
|
||||
#include <linux/crc32.h>
|
||||
|
||||
MODULE_AUTHOR("Jouni Malinen");
|
||||
|
|
@ -49,9 +49,9 @@ struct ieee80211_tkip_data {
|
|||
|
||||
int key_idx;
|
||||
|
||||
struct crypto_sync_skcipher *rx_tfm_arc4;
|
||||
struct arc4_ctx rx_ctx_arc4;
|
||||
struct arc4_ctx tx_ctx_arc4;
|
||||
struct crypto_shash *rx_tfm_michael;
|
||||
struct crypto_sync_skcipher *tx_tfm_arc4;
|
||||
struct crypto_shash *tx_tfm_michael;
|
||||
|
||||
/* scratch buffers for virt_to_page() (crypto API) */
|
||||
|
|
@ -62,19 +62,14 @@ static void *ieee80211_tkip_init(int key_idx)
|
|||
{
|
||||
struct ieee80211_tkip_data *priv;
|
||||
|
||||
if (fips_enabled)
|
||||
return NULL;
|
||||
|
||||
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv)
|
||||
goto fail;
|
||||
priv->key_idx = key_idx;
|
||||
|
||||
priv->tx_tfm_arc4 = crypto_alloc_sync_skcipher("ecb(arc4)", 0, 0);
|
||||
if (IS_ERR(priv->tx_tfm_arc4)) {
|
||||
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
|
||||
"crypto API arc4\n");
|
||||
priv->tx_tfm_arc4 = NULL;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
priv->tx_tfm_michael = crypto_alloc_shash("michael_mic", 0, 0);
|
||||
if (IS_ERR(priv->tx_tfm_michael)) {
|
||||
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
|
||||
|
|
@ -83,14 +78,6 @@ static void *ieee80211_tkip_init(int key_idx)
|
|||
goto fail;
|
||||
}
|
||||
|
||||
priv->rx_tfm_arc4 = crypto_alloc_sync_skcipher("ecb(arc4)", 0, 0);
|
||||
if (IS_ERR(priv->rx_tfm_arc4)) {
|
||||
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
|
||||
"crypto API arc4\n");
|
||||
priv->rx_tfm_arc4 = NULL;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
priv->rx_tfm_michael = crypto_alloc_shash("michael_mic", 0, 0);
|
||||
if (IS_ERR(priv->rx_tfm_michael)) {
|
||||
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
|
||||
|
|
@ -104,9 +91,7 @@ static void *ieee80211_tkip_init(int key_idx)
|
|||
fail:
|
||||
if (priv) {
|
||||
crypto_free_shash(priv->tx_tfm_michael);
|
||||
crypto_free_sync_skcipher(priv->tx_tfm_arc4);
|
||||
crypto_free_shash(priv->rx_tfm_michael);
|
||||
crypto_free_sync_skcipher(priv->rx_tfm_arc4);
|
||||
kfree(priv);
|
||||
}
|
||||
|
||||
|
|
@ -120,11 +105,9 @@ static void ieee80211_tkip_deinit(void *priv)
|
|||
|
||||
if (_priv) {
|
||||
crypto_free_shash(_priv->tx_tfm_michael);
|
||||
crypto_free_sync_skcipher(_priv->tx_tfm_arc4);
|
||||
crypto_free_shash(_priv->rx_tfm_michael);
|
||||
crypto_free_sync_skcipher(_priv->rx_tfm_arc4);
|
||||
}
|
||||
kfree(priv);
|
||||
kzfree(priv);
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -290,10 +273,8 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
|
|||
u8 *pos;
|
||||
struct rtl_80211_hdr_4addr *hdr;
|
||||
struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
|
||||
int ret = 0;
|
||||
u8 rc4key[16], *icv;
|
||||
u32 crc;
|
||||
struct scatterlist sg;
|
||||
|
||||
if (skb_headroom(skb) < 8 || skb_tailroom(skb) < 4 ||
|
||||
skb->len < hdr_len)
|
||||
|
|
@ -334,21 +315,15 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
|
|||
*pos++ = (tkey->tx_iv32 >> 24) & 0xff;
|
||||
|
||||
if (!tcb_desc->bHwSec) {
|
||||
SYNC_SKCIPHER_REQUEST_ON_STACK(req, tkey->tx_tfm_arc4);
|
||||
|
||||
icv = skb_put(skb, 4);
|
||||
crc = ~crc32_le(~0, pos, len);
|
||||
icv[0] = crc;
|
||||
icv[1] = crc >> 8;
|
||||
icv[2] = crc >> 16;
|
||||
icv[3] = crc >> 24;
|
||||
crypto_sync_skcipher_setkey(tkey->tx_tfm_arc4, rc4key, 16);
|
||||
sg_init_one(&sg, pos, len + 4);
|
||||
skcipher_request_set_sync_tfm(req, tkey->tx_tfm_arc4);
|
||||
skcipher_request_set_callback(req, 0, NULL, NULL);
|
||||
skcipher_request_set_crypt(req, &sg, &sg, len + 4, NULL);
|
||||
ret = crypto_skcipher_encrypt(req);
|
||||
skcipher_request_zero(req);
|
||||
|
||||
arc4_setkey(&tkey->tx_ctx_arc4, rc4key, 16);
|
||||
arc4_crypt(&tkey->tx_ctx_arc4, pos, pos, len + 4);
|
||||
}
|
||||
|
||||
tkey->tx_iv16++;
|
||||
|
|
@ -357,12 +332,7 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
|
|||
tkey->tx_iv32++;
|
||||
}
|
||||
|
||||
if (!tcb_desc->bHwSec)
|
||||
return ret;
|
||||
else
|
||||
return 0;
|
||||
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
|
||||
|
|
@ -376,9 +346,7 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
|
|||
u8 rc4key[16];
|
||||
u8 icv[4];
|
||||
u32 crc;
|
||||
struct scatterlist sg;
|
||||
int plen;
|
||||
int err;
|
||||
|
||||
if (skb->len < hdr_len + 8 + 4)
|
||||
return -1;
|
||||
|
|
@ -412,8 +380,6 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
|
|||
pos += 8;
|
||||
|
||||
if (!tcb_desc->bHwSec) {
|
||||
SYNC_SKCIPHER_REQUEST_ON_STACK(req, tkey->rx_tfm_arc4);
|
||||
|
||||
if (iv32 < tkey->rx_iv32 ||
|
||||
(iv32 == tkey->rx_iv32 && iv16 <= tkey->rx_iv16)) {
|
||||
if (net_ratelimit()) {
|
||||
|
|
@ -434,23 +400,8 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
|
|||
|
||||
plen = skb->len - hdr_len - 12;
|
||||
|
||||
crypto_sync_skcipher_setkey(tkey->rx_tfm_arc4, rc4key, 16);
|
||||
sg_init_one(&sg, pos, plen + 4);
|
||||
|
||||
skcipher_request_set_sync_tfm(req, tkey->rx_tfm_arc4);
|
||||
skcipher_request_set_callback(req, 0, NULL, NULL);
|
||||
skcipher_request_set_crypt(req, &sg, &sg, plen + 4, NULL);
|
||||
|
||||
err = crypto_skcipher_decrypt(req);
|
||||
skcipher_request_zero(req);
|
||||
if (err) {
|
||||
if (net_ratelimit()) {
|
||||
netdev_dbg(skb->dev, "TKIP: failed to decrypt "
|
||||
"received packet from %pM\n",
|
||||
hdr->addr2);
|
||||
}
|
||||
return -7;
|
||||
}
|
||||
arc4_setkey(&tkey->rx_ctx_arc4, rc4key, 16);
|
||||
arc4_crypt(&tkey->rx_ctx_arc4, pos, pos, plen + 4);
|
||||
|
||||
crc = ~crc32_le(~0, pos, plen);
|
||||
icv[0] = crc;
|
||||
|
|
@ -655,17 +606,13 @@ static int ieee80211_tkip_set_key(void *key, int len, u8 *seq, void *priv)
|
|||
struct ieee80211_tkip_data *tkey = priv;
|
||||
int keyidx;
|
||||
struct crypto_shash *tfm = tkey->tx_tfm_michael;
|
||||
struct crypto_sync_skcipher *tfm2 = tkey->tx_tfm_arc4;
|
||||
struct crypto_shash *tfm3 = tkey->rx_tfm_michael;
|
||||
struct crypto_sync_skcipher *tfm4 = tkey->rx_tfm_arc4;
|
||||
|
||||
keyidx = tkey->key_idx;
|
||||
memset(tkey, 0, sizeof(*tkey));
|
||||
tkey->key_idx = keyidx;
|
||||
tkey->tx_tfm_michael = tfm;
|
||||
tkey->tx_tfm_arc4 = tfm2;
|
||||
tkey->rx_tfm_michael = tfm3;
|
||||
tkey->rx_tfm_arc4 = tfm4;
|
||||
|
||||
if (len == TKIP_KEY_LEN) {
|
||||
memcpy(tkey->key, key, TKIP_KEY_LEN);
|
||||
|
|
|
|||
|
|
@ -5,6 +5,7 @@
|
|||
* Copyright (c) 2002-2004, Jouni Malinen <jkmaline@cc.hut.fi>
|
||||
*/
|
||||
|
||||
#include <linux/fips.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/slab.h>
|
||||
|
|
@ -14,8 +15,7 @@
|
|||
|
||||
#include "ieee80211.h"
|
||||
|
||||
#include <crypto/skcipher.h>
|
||||
#include <linux/scatterlist.h>
|
||||
#include <crypto/arc4.h>
|
||||
#include <linux/crc32.h>
|
||||
|
||||
MODULE_AUTHOR("Jouni Malinen");
|
||||
|
|
@ -28,8 +28,8 @@ struct prism2_wep_data {
|
|||
u8 key[WEP_KEY_LEN + 1];
|
||||
u8 key_len;
|
||||
u8 key_idx;
|
||||
struct crypto_sync_skcipher *tx_tfm;
|
||||
struct crypto_sync_skcipher *rx_tfm;
|
||||
struct arc4_ctx rx_ctx_arc4;
|
||||
struct arc4_ctx tx_ctx_arc4;
|
||||
};
|
||||
|
||||
|
||||
|
|
@ -37,39 +37,24 @@ static void *prism2_wep_init(int keyidx)
|
|||
{
|
||||
struct prism2_wep_data *priv;
|
||||
|
||||
if (fips_enabled)
|
||||
return NULL;
|
||||
|
||||
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv)
|
||||
return NULL;
|
||||
priv->key_idx = keyidx;
|
||||
|
||||
priv->tx_tfm = crypto_alloc_sync_skcipher("ecb(arc4)", 0, 0);
|
||||
if (IS_ERR(priv->tx_tfm))
|
||||
goto free_priv;
|
||||
priv->rx_tfm = crypto_alloc_sync_skcipher("ecb(arc4)", 0, 0);
|
||||
if (IS_ERR(priv->rx_tfm))
|
||||
goto free_tx;
|
||||
|
||||
/* start WEP IV from a random value */
|
||||
get_random_bytes(&priv->iv, 4);
|
||||
|
||||
return priv;
|
||||
free_tx:
|
||||
crypto_free_sync_skcipher(priv->tx_tfm);
|
||||
free_priv:
|
||||
kfree(priv);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
static void prism2_wep_deinit(void *priv)
|
||||
{
|
||||
struct prism2_wep_data *_priv = priv;
|
||||
|
||||
if (_priv) {
|
||||
crypto_free_sync_skcipher(_priv->tx_tfm);
|
||||
crypto_free_sync_skcipher(_priv->rx_tfm);
|
||||
}
|
||||
kfree(priv);
|
||||
kzfree(priv);
|
||||
}
|
||||
|
||||
/* Perform WEP encryption on given skb that has at least 4 bytes of headroom
|
||||
|
|
@ -87,8 +72,6 @@ static int prism2_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
|
|||
struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
|
||||
u32 crc;
|
||||
u8 *icv;
|
||||
struct scatterlist sg;
|
||||
int err;
|
||||
|
||||
if (skb_headroom(skb) < 4 || skb_tailroom(skb) < 4 ||
|
||||
skb->len < hdr_len)
|
||||
|
|
@ -124,8 +107,6 @@ static int prism2_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
|
|||
memcpy(key + 3, wep->key, wep->key_len);
|
||||
|
||||
if (!tcb_desc->bHwSec) {
|
||||
SYNC_SKCIPHER_REQUEST_ON_STACK(req, wep->tx_tfm);
|
||||
|
||||
/* Append little-endian CRC32 and encrypt it to produce ICV */
|
||||
crc = ~crc32_le(~0, pos, len);
|
||||
icv = skb_put(skb, 4);
|
||||
|
|
@ -134,16 +115,8 @@ static int prism2_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
|
|||
icv[2] = crc >> 16;
|
||||
icv[3] = crc >> 24;
|
||||
|
||||
crypto_sync_skcipher_setkey(wep->tx_tfm, key, klen);
|
||||
sg_init_one(&sg, pos, len + 4);
|
||||
|
||||
skcipher_request_set_sync_tfm(req, wep->tx_tfm);
|
||||
skcipher_request_set_callback(req, 0, NULL, NULL);
|
||||
skcipher_request_set_crypt(req, &sg, &sg, len + 4, NULL);
|
||||
|
||||
err = crypto_skcipher_encrypt(req);
|
||||
skcipher_request_zero(req);
|
||||
return err;
|
||||
arc4_setkey(&wep->tx_ctx_arc4, key, klen);
|
||||
arc4_crypt(&wep->tx_ctx_arc4, pos, pos, len + 4);
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
|
@ -166,8 +139,6 @@ static int prism2_wep_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
|
|||
struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
|
||||
u32 crc;
|
||||
u8 icv[4];
|
||||
struct scatterlist sg;
|
||||
int err;
|
||||
|
||||
if (skb->len < hdr_len + 8)
|
||||
return -1;
|
||||
|
|
@ -189,19 +160,8 @@ static int prism2_wep_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
|
|||
plen = skb->len - hdr_len - 8;
|
||||
|
||||
if (!tcb_desc->bHwSec) {
|
||||
SYNC_SKCIPHER_REQUEST_ON_STACK(req, wep->rx_tfm);
|
||||
|
||||
crypto_sync_skcipher_setkey(wep->rx_tfm, key, klen);
|
||||
sg_init_one(&sg, pos, plen + 4);
|
||||
|
||||
skcipher_request_set_sync_tfm(req, wep->rx_tfm);
|
||||
skcipher_request_set_callback(req, 0, NULL, NULL);
|
||||
skcipher_request_set_crypt(req, &sg, &sg, plen + 4, NULL);
|
||||
|
||||
err = crypto_skcipher_decrypt(req);
|
||||
skcipher_request_zero(req);
|
||||
if (err)
|
||||
return -7;
|
||||
arc4_setkey(&wep->rx_ctx_arc4, key, klen);
|
||||
arc4_crypt(&wep->rx_ctx_arc4, pos, pos, plen + 4);
|
||||
|
||||
crc = ~crc32_le(~0, pos, plen);
|
||||
icv[0] = crc;
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user