Commit 608fb34c authored by Herbert Xu's avatar Herbert Xu

lib80211: 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>
parent 3b5cf20c
...@@ -29,7 +29,8 @@ ...@@ -29,7 +29,8 @@
#include <linux/ieee80211.h> #include <linux/ieee80211.h>
#include <net/iw_handler.h> #include <net/iw_handler.h>
#include <linux/crypto.h> #include <crypto/hash.h>
#include <crypto/skcipher.h>
#include <linux/crc32.h> #include <linux/crc32.h>
#include <net/lib80211.h> #include <net/lib80211.h>
...@@ -63,10 +64,10 @@ struct lib80211_tkip_data { ...@@ -63,10 +64,10 @@ struct lib80211_tkip_data {
int key_idx; int key_idx;
struct crypto_blkcipher *rx_tfm_arc4; struct crypto_skcipher *rx_tfm_arc4;
struct crypto_hash *rx_tfm_michael; struct crypto_ahash *rx_tfm_michael;
struct crypto_blkcipher *tx_tfm_arc4; struct crypto_skcipher *tx_tfm_arc4;
struct crypto_hash *tx_tfm_michael; struct crypto_ahash *tx_tfm_michael;
/* scratch buffers for virt_to_page() (crypto API) */ /* scratch buffers for virt_to_page() (crypto API) */
u8 rx_hdr[16], tx_hdr[16]; u8 rx_hdr[16], tx_hdr[16];
...@@ -98,29 +99,29 @@ static void *lib80211_tkip_init(int key_idx) ...@@ -98,29 +99,29 @@ static void *lib80211_tkip_init(int key_idx)
priv->key_idx = key_idx; 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); CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->tx_tfm_arc4)) { if (IS_ERR(priv->tx_tfm_arc4)) {
priv->tx_tfm_arc4 = NULL; priv->tx_tfm_arc4 = NULL;
goto fail; 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); CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->tx_tfm_michael)) { if (IS_ERR(priv->tx_tfm_michael)) {
priv->tx_tfm_michael = NULL; priv->tx_tfm_michael = NULL;
goto fail; 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); CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->rx_tfm_arc4)) { if (IS_ERR(priv->rx_tfm_arc4)) {
priv->rx_tfm_arc4 = NULL; priv->rx_tfm_arc4 = NULL;
goto fail; 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); CRYPTO_ALG_ASYNC);
if (IS_ERR(priv->rx_tfm_michael)) { if (IS_ERR(priv->rx_tfm_michael)) {
priv->rx_tfm_michael = NULL; priv->rx_tfm_michael = NULL;
goto fail; goto fail;
...@@ -130,14 +131,10 @@ static void *lib80211_tkip_init(int key_idx) ...@@ -130,14 +131,10 @@ static void *lib80211_tkip_init(int key_idx)
fail: fail:
if (priv) { if (priv) {
if (priv->tx_tfm_michael) crypto_free_ahash(priv->tx_tfm_michael);
crypto_free_hash(priv->tx_tfm_michael); crypto_free_skcipher(priv->tx_tfm_arc4);
if (priv->tx_tfm_arc4) crypto_free_ahash(priv->rx_tfm_michael);
crypto_free_blkcipher(priv->tx_tfm_arc4); crypto_free_skcipher(priv->rx_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);
kfree(priv); kfree(priv);
} }
...@@ -148,14 +145,10 @@ static void lib80211_tkip_deinit(void *priv) ...@@ -148,14 +145,10 @@ static void lib80211_tkip_deinit(void *priv)
{ {
struct lib80211_tkip_data *_priv = priv; struct lib80211_tkip_data *_priv = priv;
if (_priv) { if (_priv) {
if (_priv->tx_tfm_michael) crypto_free_ahash(_priv->tx_tfm_michael);
crypto_free_hash(_priv->tx_tfm_michael); crypto_free_skcipher(_priv->tx_tfm_arc4);
if (_priv->tx_tfm_arc4) crypto_free_ahash(_priv->rx_tfm_michael);
crypto_free_blkcipher(_priv->tx_tfm_arc4); crypto_free_skcipher(_priv->rx_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);
} }
kfree(priv); kfree(priv);
} }
...@@ -353,11 +346,12 @@ static int lib80211_tkip_hdr(struct sk_buff *skb, int hdr_len, ...@@ -353,11 +346,12 @@ static int lib80211_tkip_hdr(struct sk_buff *skb, int hdr_len,
static int lib80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv) static int lib80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
{ {
struct lib80211_tkip_data *tkey = priv; struct lib80211_tkip_data *tkey = priv;
struct blkcipher_desc desc = { .tfm = tkey->tx_tfm_arc4 }; SKCIPHER_REQUEST_ON_STACK(req, tkey->tx_tfm_arc4);
int len; int len;
u8 rc4key[16], *pos, *icv; u8 rc4key[16], *pos, *icv;
u32 crc; u32 crc;
struct scatterlist sg; struct scatterlist sg;
int err;
if (tkey->flags & IEEE80211_CRYPTO_TKIP_COUNTERMEASURES) { if (tkey->flags & IEEE80211_CRYPTO_TKIP_COUNTERMEASURES) {
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
...@@ -382,9 +376,14 @@ static int lib80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv) ...@@ -382,9 +376,14 @@ static int lib80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
icv[2] = crc >> 16; icv[2] = crc >> 16;
icv[3] = crc >> 24; 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); sg_init_one(&sg, pos, len + 4);
return 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);
err = crypto_skcipher_encrypt(req);
skcipher_request_zero(req);
return err;
} }
/* /*
...@@ -403,7 +402,7 @@ static inline int tkip_replay_check(u32 iv32_n, u16 iv16_n, ...@@ -403,7 +402,7 @@ static inline int tkip_replay_check(u32 iv32_n, u16 iv16_n,
static int lib80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv) static int lib80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
{ {
struct lib80211_tkip_data *tkey = priv; struct lib80211_tkip_data *tkey = priv;
struct blkcipher_desc desc = { .tfm = tkey->rx_tfm_arc4 }; SKCIPHER_REQUEST_ON_STACK(req, tkey->rx_tfm_arc4);
u8 rc4key[16]; u8 rc4key[16];
u8 keyidx, *pos; u8 keyidx, *pos;
u32 iv32; u32 iv32;
...@@ -413,6 +412,7 @@ static int lib80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv) ...@@ -413,6 +412,7 @@ static int lib80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
u32 crc; u32 crc;
struct scatterlist sg; struct scatterlist sg;
int plen; int plen;
int err;
hdr = (struct ieee80211_hdr *)skb->data; hdr = (struct ieee80211_hdr *)skb->data;
...@@ -465,9 +465,14 @@ static int lib80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv) ...@@ -465,9 +465,14 @@ static int lib80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
plen = skb->len - hdr_len - 12; 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); 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) {
net_dbg_ratelimited("TKIP: failed to decrypt received packet from %pM\n", net_dbg_ratelimited("TKIP: failed to decrypt received packet from %pM\n",
hdr->addr2); hdr->addr2);
return -7; return -7;
...@@ -505,11 +510,12 @@ static int lib80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv) ...@@ -505,11 +510,12 @@ static int lib80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
return keyidx; 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) u8 * data, size_t data_len, u8 * mic)
{ {
struct hash_desc desc; AHASH_REQUEST_ON_STACK(req, tfm_michael);
struct scatterlist sg[2]; struct scatterlist sg[2];
int err;
if (tfm_michael == NULL) { if (tfm_michael == NULL) {
pr_warn("%s(): tfm_michael == NULL\n", __func__); pr_warn("%s(): tfm_michael == NULL\n", __func__);
...@@ -519,12 +525,15 @@ static int michael_mic(struct crypto_hash *tfm_michael, u8 * key, u8 * hdr, ...@@ -519,12 +525,15 @@ static int michael_mic(struct crypto_hash *tfm_michael, u8 * key, u8 * hdr,
sg_set_buf(&sg[0], hdr, 16); sg_set_buf(&sg[0], hdr, 16);
sg_set_buf(&sg[1], data, data_len); 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; return -1;
desc.tfm = tfm_michael; ahash_request_set_tfm(req, tfm_michael);
desc.flags = 0; ahash_request_set_callback(req, 0, NULL, NULL);
return crypto_hash_digest(&desc, sg, data_len + 16, mic); 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) static void michael_mic_hdr(struct sk_buff *skb, u8 * hdr)
...@@ -645,10 +654,10 @@ static int lib80211_tkip_set_key(void *key, int len, u8 * seq, void *priv) ...@@ -645,10 +654,10 @@ static int lib80211_tkip_set_key(void *key, int len, u8 * seq, void *priv)
{ {
struct lib80211_tkip_data *tkey = priv; struct lib80211_tkip_data *tkey = priv;
int keyidx; int keyidx;
struct crypto_hash *tfm = tkey->tx_tfm_michael; struct crypto_ahash *tfm = tkey->tx_tfm_michael;
struct crypto_blkcipher *tfm2 = tkey->tx_tfm_arc4; struct crypto_skcipher *tfm2 = tkey->tx_tfm_arc4;
struct crypto_hash *tfm3 = tkey->rx_tfm_michael; struct crypto_ahash *tfm3 = tkey->rx_tfm_michael;
struct crypto_blkcipher *tfm4 = tkey->rx_tfm_arc4; struct crypto_skcipher *tfm4 = tkey->rx_tfm_arc4;
keyidx = tkey->key_idx; keyidx = tkey->key_idx;
memset(tkey, 0, sizeof(*tkey)); memset(tkey, 0, sizeof(*tkey));
......
...@@ -22,7 +22,7 @@ ...@@ -22,7 +22,7 @@
#include <net/lib80211.h> #include <net/lib80211.h>
#include <linux/crypto.h> #include <crypto/skcipher.h>
#include <linux/crc32.h> #include <linux/crc32.h>
MODULE_AUTHOR("Jouni Malinen"); MODULE_AUTHOR("Jouni Malinen");
...@@ -35,8 +35,8 @@ struct lib80211_wep_data { ...@@ -35,8 +35,8 @@ struct lib80211_wep_data {
u8 key[WEP_KEY_LEN + 1]; u8 key[WEP_KEY_LEN + 1];
u8 key_len; u8 key_len;
u8 key_idx; u8 key_idx;
struct crypto_blkcipher *tx_tfm; struct crypto_skcipher *tx_tfm;
struct crypto_blkcipher *rx_tfm; struct crypto_skcipher *rx_tfm;
}; };
static void *lib80211_wep_init(int keyidx) static void *lib80211_wep_init(int keyidx)
...@@ -48,13 +48,13 @@ static void *lib80211_wep_init(int keyidx) ...@@ -48,13 +48,13 @@ static void *lib80211_wep_init(int keyidx)
goto fail; goto fail;
priv->key_idx = keyidx; 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)) { if (IS_ERR(priv->tx_tfm)) {
priv->tx_tfm = NULL; priv->tx_tfm = NULL;
goto fail; goto fail;
} }
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)) { if (IS_ERR(priv->rx_tfm)) {
priv->rx_tfm = NULL; priv->rx_tfm = NULL;
goto fail; goto fail;
...@@ -66,10 +66,8 @@ static void *lib80211_wep_init(int keyidx) ...@@ -66,10 +66,8 @@ static void *lib80211_wep_init(int keyidx)
fail: fail:
if (priv) { if (priv) {
if (priv->tx_tfm) crypto_free_skcipher(priv->tx_tfm);
crypto_free_blkcipher(priv->tx_tfm); crypto_free_skcipher(priv->rx_tfm);
if (priv->rx_tfm)
crypto_free_blkcipher(priv->rx_tfm);
kfree(priv); kfree(priv);
} }
return NULL; return NULL;
...@@ -79,10 +77,8 @@ static void lib80211_wep_deinit(void *priv) ...@@ -79,10 +77,8 @@ static void lib80211_wep_deinit(void *priv)
{ {
struct lib80211_wep_data *_priv = priv; struct lib80211_wep_data *_priv = priv;
if (_priv) { if (_priv) {
if (_priv->tx_tfm) crypto_free_skcipher(_priv->tx_tfm);
crypto_free_blkcipher(_priv->tx_tfm); crypto_free_skcipher(_priv->rx_tfm);
if (_priv->rx_tfm)
crypto_free_blkcipher(_priv->rx_tfm);
} }
kfree(priv); kfree(priv);
} }
...@@ -133,11 +129,12 @@ static int lib80211_wep_build_iv(struct sk_buff *skb, int hdr_len, ...@@ -133,11 +129,12 @@ static int lib80211_wep_build_iv(struct sk_buff *skb, int hdr_len,
static int lib80211_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv) static int lib80211_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
{ {
struct lib80211_wep_data *wep = priv; struct lib80211_wep_data *wep = priv;
struct blkcipher_desc desc = { .tfm = wep->tx_tfm }; SKCIPHER_REQUEST_ON_STACK(req, wep->tx_tfm);
u32 crc, klen, len; u32 crc, klen, len;
u8 *pos, *icv; u8 *pos, *icv;
struct scatterlist sg; struct scatterlist sg;
u8 key[WEP_KEY_LEN + 3]; u8 key[WEP_KEY_LEN + 3];
int err;
/* other checks are in lib80211_wep_build_iv */ /* other checks are in lib80211_wep_build_iv */
if (skb_tailroom(skb) < 4) if (skb_tailroom(skb) < 4)
...@@ -165,9 +162,14 @@ static int lib80211_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv) ...@@ -165,9 +162,14 @@ static int lib80211_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
icv[2] = crc >> 16; icv[2] = crc >> 16;
icv[3] = crc >> 24; 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); 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;
} }
/* Perform WEP decryption on given buffer. Buffer includes whole WEP part of /* Perform WEP decryption on given buffer. Buffer includes whole WEP part of
...@@ -180,11 +182,12 @@ static int lib80211_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv) ...@@ -180,11 +182,12 @@ static int lib80211_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
static int lib80211_wep_decrypt(struct sk_buff *skb, int hdr_len, void *priv) static int lib80211_wep_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
{ {
struct lib80211_wep_data *wep = priv; struct lib80211_wep_data *wep = priv;
struct blkcipher_desc desc = { .tfm = wep->rx_tfm }; SKCIPHER_REQUEST_ON_STACK(req, wep->rx_tfm);
u32 crc, klen, plen; u32 crc, klen, plen;
u8 key[WEP_KEY_LEN + 3]; u8 key[WEP_KEY_LEN + 3];
u8 keyidx, *pos, icv[4]; u8 keyidx, *pos, icv[4];
struct scatterlist sg; struct scatterlist sg;
int err;
if (skb->len < hdr_len + 8) if (skb->len < hdr_len + 8)
return -1; return -1;
...@@ -205,9 +208,14 @@ static int lib80211_wep_decrypt(struct sk_buff *skb, int hdr_len, void *priv) ...@@ -205,9 +208,14 @@ static int lib80211_wep_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
/* Apply RC4 to data and compute CRC32 over decrypted data */ /* Apply RC4 to data and compute CRC32 over decrypted data */
plen = skb->len - hdr_len - 8; plen = skb->len - hdr_len - 8;
crypto_blkcipher_setkey(wep->rx_tfm, key, klen); crypto_skcipher_setkey(wep->rx_tfm, key, klen);
sg_init_one(&sg, pos, plen + 4); 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; return -7;
crc = ~crc32_le(~0, pos, plen); crc = ~crc32_le(~0, pos, plen);
......
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