/*
* Host AP crypt: host-based TKIP encryption implementation for Host AP driver
*
- * Copyright (c) 2003-2004, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright (c) 2003-2004, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* more details.
*/
-#include <linux/config.h>
+#include <linux/err.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/random.h>
+#include <linux/scatterlist.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
+#include <linux/mm.h>
#include <linux/if_ether.h>
#include <linux/if_arp.h>
#include <asm/string.h>
#include <net/ieee80211.h>
#include <linux/crypto.h>
-#include <asm/scatterlist.h>
#include <linux/crc32.h>
MODULE_AUTHOR("Jouni Malinen");
int key_idx;
- struct crypto_tfm *tfm_arc4;
- struct crypto_tfm *tfm_michael;
+ struct crypto_blkcipher *rx_tfm_arc4;
+ struct crypto_hash *rx_tfm_michael;
+ struct crypto_blkcipher *tx_tfm_arc4;
+ struct crypto_hash *tx_tfm_michael;
/* scratch buffers for virt_to_page() (crypto API) */
u8 rx_hdr[16], tx_hdr[16];
priv->key_idx = key_idx;
- priv->tfm_arc4 = crypto_alloc_tfm("arc4", 0);
- if (priv->tfm_arc4 == NULL) {
+ priv->tx_tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0,
+ CRYPTO_ALG_ASYNC);
+ 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->tfm_michael = crypto_alloc_tfm("michael_mic", 0);
- if (priv->tfm_michael == NULL) {
+ priv->tx_tfm_michael = crypto_alloc_hash("michael_mic", 0,
+ CRYPTO_ALG_ASYNC);
+ if (IS_ERR(priv->tx_tfm_michael)) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
"crypto API michael_mic\n");
+ priv->tx_tfm_michael = NULL;
+ goto fail;
+ }
+
+ priv->rx_tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0,
+ CRYPTO_ALG_ASYNC);
+ 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_hash("michael_mic", 0,
+ CRYPTO_ALG_ASYNC);
+ if (IS_ERR(priv->rx_tfm_michael)) {
+ printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
+ "crypto API michael_mic\n");
+ priv->rx_tfm_michael = NULL;
goto fail;
}
fail:
if (priv) {
- if (priv->tfm_michael)
- crypto_free_tfm(priv->tfm_michael);
- if (priv->tfm_arc4)
- crypto_free_tfm(priv->tfm_arc4);
+ 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);
kfree(priv);
}
static void ieee80211_tkip_deinit(void *priv)
{
struct ieee80211_tkip_data *_priv = priv;
- if (_priv && _priv->tfm_michael)
- crypto_free_tfm(_priv->tfm_michael);
- if (_priv && _priv->tfm_arc4)
- crypto_free_tfm(_priv->tfm_arc4);
+ 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);
+ }
kfree(priv);
}
return lo | (((u16) hi) << 8);
}
-static inline u16 Mk16_le(u16 * v)
+static inline u16 Mk16_le(__le16 * v)
{
return le16_to_cpu(*v);
}
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((__le16 *) & TK[0]));
+ PPK[1] += _S_(PPK[0] ^ Mk16_le((__le16 *) & TK[2]));
+ PPK[2] += _S_(PPK[1] ^ Mk16_le((__le16 *) & TK[4]));
+ PPK[3] += _S_(PPK[2] ^ Mk16_le((__le16 *) & TK[6]));
+ PPK[4] += _S_(PPK[3] ^ Mk16_le((__le16 *) & TK[8]));
+ PPK[5] += _S_(PPK[4] ^ Mk16_le((__le16 *) & TK[10]));
+
+ PPK[0] += RotR1(PPK[5] ^ Mk16_le((__le16 *) & TK[12]));
+ PPK[1] += RotR1(PPK[0] ^ Mk16_le((__le16 *) & TK[14]));
PPK[2] += RotR1(PPK[1]);
PPK[3] += RotR1(PPK[2]);
PPK[4] += RotR1(PPK[3]);
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((__le16 *) & TK[0])) >> 1);
#ifdef __BIG_ENDIAN
{
static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
+ struct blkcipher_desc desc = { .tfm = tkey->tx_tfm_arc4 };
int len;
u8 rc4key[16], *pos, *icv;
u32 crc;
struct scatterlist sg;
+ DECLARE_MAC_BUF(mac);
if (tkey->flags & IEEE80211_CRYPTO_TKIP_COUNTERMEASURES) {
if (net_ratelimit()) {
struct ieee80211_hdr_4addr *hdr =
(struct ieee80211_hdr_4addr *)skb->data;
printk(KERN_DEBUG ": TKIP countermeasures: dropped "
- "TX packet to " MAC_FMT "\n",
- MAC_ARG(hdr->addr1));
+ "TX packet to %s\n",
+ print_mac(mac, hdr->addr1));
}
return -1;
}
icv[2] = crc >> 16;
icv[3] = crc >> 24;
- crypto_cipher_setkey(tkey->tfm_arc4, rc4key, 16);
- sg.page = virt_to_page(pos);
- sg.offset = offset_in_page(pos);
- sg.length = len + 4;
- crypto_cipher_encrypt(tkey->tfm_arc4, &sg, &sg, len + 4);
+ crypto_blkcipher_setkey(tkey->tx_tfm_arc4, rc4key, 16);
+ sg_init_one(&sg, pos, len + 4);
+ return crypto_blkcipher_encrypt(&desc, &sg, &sg, len + 4);
+}
+/*
+ * deal with seq counter wrapping correctly.
+ * refer to timer_after() for jiffies wrapping handling
+ */
+static inline int tkip_replay_check(u32 iv32_n, u16 iv16_n,
+ u32 iv32_o, u16 iv16_o)
+{
+ if ((s32)iv32_n - (s32)iv32_o < 0 ||
+ (iv32_n == iv32_o && iv16_n <= iv16_o))
+ return 1;
return 0;
}
static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
{
struct ieee80211_tkip_data *tkey = priv;
+ struct blkcipher_desc desc = { .tfm = tkey->rx_tfm_arc4 };
u8 rc4key[16];
u8 keyidx, *pos;
u32 iv32;
u32 crc;
struct scatterlist sg;
int plen;
+ DECLARE_MAC_BUF(mac);
hdr = (struct ieee80211_hdr_4addr *)skb->data;
if (tkey->flags & IEEE80211_CRYPTO_TKIP_COUNTERMEASURES) {
if (net_ratelimit()) {
printk(KERN_DEBUG ": TKIP countermeasures: dropped "
- "received packet from " MAC_FMT "\n",
- MAC_ARG(hdr->addr2));
+ "received packet from %s\n",
+ print_mac(mac, hdr->addr2));
}
return -1;
}
if (!(keyidx & (1 << 5))) {
if (net_ratelimit()) {
printk(KERN_DEBUG "TKIP: received packet without ExtIV"
- " flag from " MAC_FMT "\n", MAC_ARG(hdr->addr2));
+ " flag from %s\n", print_mac(mac, hdr->addr2));
}
return -2;
}
}
if (!tkey->key_set) {
if (net_ratelimit()) {
- printk(KERN_DEBUG "TKIP: received packet from " MAC_FMT
+ printk(KERN_DEBUG "TKIP: received packet from %s"
" with keyid=%d that does not have a configured"
- " key\n", MAC_ARG(hdr->addr2), keyidx);
+ " key\n", print_mac(mac, hdr->addr2), keyidx);
}
return -3;
}
iv32 = pos[4] | (pos[5] << 8) | (pos[6] << 16) | (pos[7] << 24);
pos += 8;
- if (iv32 < tkey->rx_iv32 ||
- (iv32 == tkey->rx_iv32 && iv16 <= tkey->rx_iv16)) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "TKIP: replay detected: STA=" MAC_FMT
+ if (tkip_replay_check(iv32, iv16, tkey->rx_iv32, tkey->rx_iv16)) {
+ if (ieee80211_ratelimit_debug(IEEE80211_DL_DROP)) {
+ IEEE80211_DEBUG_DROP("TKIP: replay detected: STA=%s"
" previous TSC %08x%04x received TSC "
- "%08x%04x\n", MAC_ARG(hdr->addr2),
+ "%08x%04x\n", print_mac(mac, hdr->addr2),
tkey->rx_iv32, tkey->rx_iv16, iv32, iv16);
}
tkey->dot11RSNAStatsTKIPReplays++;
plen = skb->len - hdr_len - 12;
- crypto_cipher_setkey(tkey->tfm_arc4, rc4key, 16);
- sg.page = virt_to_page(pos);
- sg.offset = offset_in_page(pos);
- sg.length = plen + 4;
- crypto_cipher_decrypt(tkey->tfm_arc4, &sg, &sg, plen + 4);
+ crypto_blkcipher_setkey(tkey->rx_tfm_arc4, rc4key, 16);
+ sg_init_one(&sg, pos, plen + 4);
+ if (crypto_blkcipher_decrypt(&desc, &sg, &sg, plen + 4)) {
+ if (net_ratelimit()) {
+ printk(KERN_DEBUG ": TKIP: failed to decrypt "
+ "received packet from %s\n",
+ print_mac(mac, hdr->addr2));
+ }
+ return -7;
+ }
crc = ~crc32_le(~0, pos, plen);
icv[0] = crc;
* it needs to be recalculated for the next packet. */
tkey->rx_phase1_done = 0;
}
- if (net_ratelimit()) {
- printk(KERN_DEBUG "TKIP: ICV error detected: STA="
- MAC_FMT "\n", MAC_ARG(hdr->addr2));
+ if (ieee80211_ratelimit_debug(IEEE80211_DL_DROP)) {
+ IEEE80211_DEBUG_DROP("TKIP: ICV error detected: STA="
+ "%s\n", print_mac(mac, hdr->addr2));
}
tkey->dot11RSNAStatsTKIPICVErrors++;
return -5;
return keyidx;
}
-static int michael_mic(struct ieee80211_tkip_data *tkey, u8 * key, u8 * hdr,
+static int michael_mic(struct crypto_hash *tfm_michael, u8 * key, u8 * hdr,
u8 * data, size_t data_len, u8 * mic)
{
+ struct hash_desc desc;
struct scatterlist sg[2];
- if (tkey->tfm_michael == NULL) {
+ if (tfm_michael == NULL) {
printk(KERN_WARNING "michael_mic: tfm_michael == NULL\n");
return -1;
}
- sg[0].page = virt_to_page(hdr);
- sg[0].offset = offset_in_page(hdr);
- sg[0].length = 16;
-
- sg[1].page = virt_to_page(data);
- sg[1].offset = offset_in_page(data);
- sg[1].length = data_len;
+ sg_init_table(sg, 2);
+ sg_set_buf(&sg[0], hdr, 16);
+ sg_set_buf(&sg[1], data, data_len);
- crypto_digest_init(tkey->tfm_michael);
- crypto_digest_setkey(tkey->tfm_michael, key, 8);
- crypto_digest_update(tkey->tfm_michael, sg, 2);
- crypto_digest_final(tkey->tfm_michael, mic);
+ if (crypto_hash_setkey(tfm_michael, key, 8))
+ return -1;
- return 0;
+ desc.tfm = tfm_michael;
+ desc.flags = 0;
+ return crypto_hash_digest(&desc, sg, data_len + 16, mic);
}
static void michael_mic_hdr(struct sk_buff *skb, u8 * hdr)
{
struct ieee80211_hdr_4addr *hdr11;
+ u16 stype;
hdr11 = (struct ieee80211_hdr_4addr *)skb->data;
+ stype = WLAN_FC_GET_STYPE(le16_to_cpu(hdr11->frame_ctl));
+
switch (le16_to_cpu(hdr11->frame_ctl) &
(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
case IEEE80211_FCTL_TODS:
break;
}
- hdr[12] = 0; /* priority */
+ if (stype & IEEE80211_STYPE_QOS_DATA) {
+ const struct ieee80211_hdr_3addrqos *qoshdr =
+ (struct ieee80211_hdr_3addrqos *)skb->data;
+ hdr[12] = le16_to_cpu(qoshdr->qos_ctl) & IEEE80211_QCTL_TID;
+ } else
+ hdr[12] = 0; /* priority */
+
hdr[13] = hdr[14] = hdr[15] = 0; /* reserved */
}
michael_mic_hdr(skb, tkey->tx_hdr);
pos = skb_put(skb, 8);
- if (michael_mic(tkey, &tkey->key[16], tkey->tx_hdr,
+ if (michael_mic(tkey->tx_tfm_michael, &tkey->key[16], tkey->tx_hdr,
skb->data + hdr_len, skb->len - 8 - hdr_len, pos))
return -1;
{
struct ieee80211_tkip_data *tkey = priv;
u8 mic[8];
+ DECLARE_MAC_BUF(mac);
if (!tkey->key_set)
return -1;
michael_mic_hdr(skb, tkey->rx_hdr);
- if (michael_mic(tkey, &tkey->key[24], tkey->rx_hdr,
+ if (michael_mic(tkey->rx_tfm_michael, &tkey->key[24], tkey->rx_hdr,
skb->data + hdr_len, skb->len - 8 - hdr_len, mic))
return -1;
if (memcmp(mic, skb->data + skb->len - 8, 8) != 0) {
struct ieee80211_hdr_4addr *hdr;
hdr = (struct ieee80211_hdr_4addr *)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),
+ "MSDU from %s keyidx=%d\n",
+ skb->dev ? skb->dev->name : "N/A", print_mac(mac, hdr->addr2),
keyidx);
if (skb->dev)
ieee80211_michael_mic_failure(skb->dev, hdr, keyidx);
{
struct ieee80211_tkip_data *tkey = priv;
int keyidx;
- struct crypto_tfm *tfm = tkey->tfm_michael;
- struct crypto_tfm *tfm2 = tkey->tfm_arc4;
+ 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;
keyidx = tkey->key_idx;
memset(tkey, 0, sizeof(*tkey));
tkey->key_idx = keyidx;
- tkey->tfm_michael = tfm;
- tkey->tfm_arc4 = tfm2;
+ 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);
tkey->key_set = 1;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff