Commit c3a79227 authored by Herbert Xu's avatar Herbert Xu
Browse files

staging: rtl8192u: Use skcipher and ahash



This patch replaces uses of blkcipher with skcipher, and the long
obsolete hash interface with ahash.
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a60b7faf
......@@ -21,7 +21,8 @@
#include "ieee80211.h"
#include <linux/crypto.h>
#include <crypto/hash.h>
#include <crypto/skcipher.h>
#include <linux/scatterlist.h>
#include <linux/crc32.h>
......@@ -52,10 +53,10 @@ struct ieee80211_tkip_data {
int key_idx;
struct crypto_blkcipher *rx_tfm_arc4;
struct crypto_hash *rx_tfm_michael;
struct crypto_blkcipher *tx_tfm_arc4;
struct crypto_hash *tx_tfm_michael;
struct crypto_skcipher *rx_tfm_arc4;
struct crypto_ahash *rx_tfm_michael;
struct crypto_skcipher *tx_tfm_arc4;
struct crypto_ahash *tx_tfm_michael;
/* scratch buffers for virt_to_page() (crypto API) */
u8 rx_hdr[16], tx_hdr[16];
......@@ -70,7 +71,7 @@ static void *ieee80211_tkip_init(int key_idx)
goto fail;
priv->key_idx = key_idx;
priv->tx_tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0,
priv->tx_tfm_arc4 = crypto_alloc_skcipher("ecb(arc4)", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->tx_tfm_arc4)) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
......@@ -79,7 +80,7 @@ static void *ieee80211_tkip_init(int key_idx)
goto fail;
}
priv->tx_tfm_michael = crypto_alloc_hash("michael_mic", 0,
priv->tx_tfm_michael = crypto_alloc_ahash("michael_mic", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->tx_tfm_michael)) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
......@@ -88,7 +89,7 @@ static void *ieee80211_tkip_init(int key_idx)
goto fail;
}
priv->rx_tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0,
priv->rx_tfm_arc4 = crypto_alloc_skcipher("ecb(arc4)", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->rx_tfm_arc4)) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
......@@ -97,7 +98,7 @@ static void *ieee80211_tkip_init(int key_idx)
goto fail;
}
priv->rx_tfm_michael = crypto_alloc_hash("michael_mic", 0,
priv->rx_tfm_michael = crypto_alloc_ahash("michael_mic", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->rx_tfm_michael)) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
......@@ -110,14 +111,10 @@ static void *ieee80211_tkip_init(int key_idx)
fail:
if (priv) {
if (priv->tx_tfm_michael)
crypto_free_hash(priv->tx_tfm_michael);
if (priv->tx_tfm_arc4)
crypto_free_blkcipher(priv->tx_tfm_arc4);
if (priv->rx_tfm_michael)
crypto_free_hash(priv->rx_tfm_michael);
if (priv->rx_tfm_arc4)
crypto_free_blkcipher(priv->rx_tfm_arc4);
crypto_free_ahash(priv->tx_tfm_michael);
crypto_free_skcipher(priv->tx_tfm_arc4);
crypto_free_ahash(priv->rx_tfm_michael);
crypto_free_skcipher(priv->rx_tfm_arc4);
kfree(priv);
}
......@@ -130,14 +127,10 @@ static void ieee80211_tkip_deinit(void *priv)
struct ieee80211_tkip_data *_priv = priv;
if (_priv) {
if (_priv->tx_tfm_michael)
crypto_free_hash(_priv->tx_tfm_michael);
if (_priv->tx_tfm_arc4)
crypto_free_blkcipher(_priv->tx_tfm_arc4);
if (_priv->rx_tfm_michael)
crypto_free_hash(_priv->rx_tfm_michael);
if (_priv->rx_tfm_arc4)
crypto_free_blkcipher(_priv->rx_tfm_arc4);
crypto_free_ahash(_priv->tx_tfm_michael);
crypto_free_skcipher(_priv->tx_tfm_arc4);
crypto_free_ahash(_priv->rx_tfm_michael);
crypto_free_skcipher(_priv->rx_tfm_arc4);
}
kfree(priv);
}
......@@ -312,7 +305,6 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
u8 *pos;
struct rtl_80211_hdr_4addr *hdr;
cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
struct blkcipher_desc desc = {.tfm = tkey->tx_tfm_arc4};
int ret = 0;
u8 rc4key[16], *icv;
u32 crc;
......@@ -357,15 +349,21 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
*pos++ = (tkey->tx_iv32 >> 24) & 0xff;
if (!tcb_desc->bHwSec) {
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_blkcipher_setkey(tkey->tx_tfm_arc4, rc4key, 16);
crypto_skcipher_setkey(tkey->tx_tfm_arc4, rc4key, 16);
sg_init_one(&sg, pos, len+4);
ret = crypto_blkcipher_encrypt(&desc, &sg, &sg, len + 4);
skcipher_request_set_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);
}
tkey->tx_iv16++;
......@@ -390,12 +388,12 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
u16 iv16;
struct rtl_80211_hdr_4addr *hdr;
cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
struct blkcipher_desc desc = {.tfm = tkey->rx_tfm_arc4};
u8 rc4key[16];
u8 icv[4];
u32 crc;
struct scatterlist sg;
int plen;
int err;
if (skb->len < hdr_len + 8 + 4)
return -1;
......@@ -429,6 +427,8 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
pos += 8;
if (!tcb_desc->bHwSec) {
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()) {
......@@ -449,10 +449,16 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
plen = skb->len - hdr_len - 12;
crypto_blkcipher_setkey(tkey->rx_tfm_arc4, rc4key, 16);
crypto_skcipher_setkey(tkey->rx_tfm_arc4, rc4key, 16);
sg_init_one(&sg, pos, plen+4);
if (crypto_blkcipher_decrypt(&desc, &sg, &sg, plen + 4)) {
skcipher_request_set_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()) {
printk(KERN_DEBUG ": TKIP: failed to decrypt "
"received packet from %pM\n",
......@@ -501,11 +507,12 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
return keyidx;
}
static int michael_mic(struct crypto_hash *tfm_michael, u8 *key, u8 *hdr,
static int michael_mic(struct crypto_ahash *tfm_michael, u8 *key, u8 *hdr,
u8 *data, size_t data_len, u8 *mic)
{
struct hash_desc desc;
AHASH_REQUEST_ON_STACK(req, tfm_michael);
struct scatterlist sg[2];
int err;
if (tfm_michael == NULL) {
printk(KERN_WARNING "michael_mic: tfm_michael == NULL\n");
......@@ -516,12 +523,15 @@ static int michael_mic(struct crypto_hash *tfm_michael, u8 *key, u8 *hdr,
sg_set_buf(&sg[0], hdr, 16);
sg_set_buf(&sg[1], data, data_len);
if (crypto_hash_setkey(tfm_michael, key, 8))
if (crypto_ahash_setkey(tfm_michael, key, 8))
return -1;
desc.tfm = tfm_michael;
desc.flags = 0;
return crypto_hash_digest(&desc, sg, data_len + 16, mic);
ahash_request_set_tfm(req, tfm_michael);
ahash_request_set_callback(req, 0, NULL, NULL);
ahash_request_set_crypt(req, sg, mic, data_len + 16);
err = crypto_ahash_digest(req);
ahash_request_zero(req);
return err;
}
static void michael_mic_hdr(struct sk_buff *skb, u8 *hdr)
......@@ -660,10 +670,10 @@ static int ieee80211_tkip_set_key(void *key, int len, u8 *seq, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
int keyidx;
struct crypto_hash *tfm = tkey->tx_tfm_michael;
struct crypto_blkcipher *tfm2 = tkey->tx_tfm_arc4;
struct crypto_hash *tfm3 = tkey->rx_tfm_michael;
struct crypto_blkcipher *tfm4 = tkey->rx_tfm_arc4;
struct crypto_ahash *tfm = tkey->tx_tfm_michael;
struct crypto_skcipher *tfm2 = tkey->tx_tfm_arc4;
struct crypto_ahash *tfm3 = tkey->rx_tfm_michael;
struct crypto_skcipher *tfm4 = tkey->rx_tfm_arc4;
keyidx = tkey->key_idx;
memset(tkey, 0, sizeof(*tkey));
......
......@@ -18,7 +18,7 @@
#include "ieee80211.h"
#include <linux/crypto.h>
#include <crypto/skcipher.h>
#include <linux/scatterlist.h>
#include <linux/crc32.h>
......@@ -32,8 +32,8 @@ struct prism2_wep_data {
u8 key[WEP_KEY_LEN + 1];
u8 key_len;
u8 key_idx;
struct crypto_blkcipher *tx_tfm;
struct crypto_blkcipher *rx_tfm;
struct crypto_skcipher *tx_tfm;
struct crypto_skcipher *rx_tfm;
};
......@@ -46,10 +46,10 @@ static void *prism2_wep_init(int keyidx)
return NULL;
priv->key_idx = keyidx;
priv->tx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
priv->tx_tfm = crypto_alloc_skcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->tx_tfm))
goto free_priv;
priv->rx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
priv->rx_tfm = crypto_alloc_skcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->rx_tfm))
goto free_tx;
......@@ -58,7 +58,7 @@ static void *prism2_wep_init(int keyidx)
return priv;
free_tx:
crypto_free_blkcipher(priv->tx_tfm);
crypto_free_skcipher(priv->tx_tfm);
free_priv:
kfree(priv);
return NULL;
......@@ -70,10 +70,8 @@ static void prism2_wep_deinit(void *priv)
struct prism2_wep_data *_priv = priv;
if (_priv) {
if (_priv->tx_tfm)
crypto_free_blkcipher(_priv->tx_tfm);
if (_priv->rx_tfm)
crypto_free_blkcipher(_priv->rx_tfm);
crypto_free_skcipher(_priv->tx_tfm);
crypto_free_skcipher(_priv->rx_tfm);
}
kfree(priv);
}
......@@ -91,10 +89,10 @@ static int prism2_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
u8 key[WEP_KEY_LEN + 3];
u8 *pos;
cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
struct blkcipher_desc desc = {.tfm = wep->tx_tfm};
u32 crc;
u8 *icv;
struct scatterlist sg;
int err;
if (skb_headroom(skb) < 4 || skb_tailroom(skb) < 4 ||
skb->len < hdr_len)
......@@ -129,6 +127,8 @@ 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) {
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);
......@@ -137,10 +137,16 @@ static int prism2_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
icv[2] = crc >> 16;
icv[3] = crc >> 24;
crypto_blkcipher_setkey(wep->tx_tfm, key, klen);
crypto_skcipher_setkey(wep->tx_tfm, key, klen);
sg_init_one(&sg, pos, len+4);
return crypto_blkcipher_encrypt(&desc, &sg, &sg, len + 4);
skcipher_request_set_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;
}
return 0;
......@@ -161,10 +167,10 @@ static int prism2_wep_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
u8 key[WEP_KEY_LEN + 3];
u8 keyidx, *pos;
cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
struct blkcipher_desc desc = {.tfm = wep->rx_tfm};
u32 crc;
u8 icv[4];
struct scatterlist sg;
int err;
if (skb->len < hdr_len + 8)
return -1;
......@@ -186,10 +192,18 @@ static int prism2_wep_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
plen = skb->len - hdr_len - 8;
if (!tcb_desc->bHwSec) {
crypto_blkcipher_setkey(wep->rx_tfm, key, klen);
SKCIPHER_REQUEST_ON_STACK(req, wep->rx_tfm);
crypto_skcipher_setkey(wep->rx_tfm, key, klen);
sg_init_one(&sg, pos, plen+4);
if (crypto_blkcipher_decrypt(&desc, &sg, &sg, plen + 4))
skcipher_request_set_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;
crc = ~crc32_le(~0, pos, plen);
......
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