static void assert_key_lock(struct ieee80211_local *local)
{
- WARN_ON(!mutex_is_locked(&local->key_mtx));
+ lockdep_assert_held(&local->key_mtx);
}
static struct ieee80211_sta *get_sta_for_key(struct ieee80211_key *key)
return NULL;
}
-static void ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
+static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
{
struct ieee80211_sub_if_data *sdata;
struct ieee80211_sta *sta;
might_sleep();
if (!key->local->ops->set_key)
- return;
+ goto out_unsupported;
assert_key_lock(key->local);
sta = get_sta_for_key(key);
+ /*
+ * If this is a per-STA GTK, check if it
+ * is supported; if not, return.
+ */
+ if (sta && !(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE) &&
+ !(key->local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK))
+ goto out_unsupported;
+
sdata = key->sdata;
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
sdata = container_of(sdata->bss,
ret = drv_set_key(key->local, SET_KEY, sdata, sta, &key->conf);
- if (!ret)
+ if (!ret) {
key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
+ return 0;
+ }
- if (ret && ret != -ENOSPC && ret != -EOPNOTSUPP)
- printk(KERN_ERR "mac80211-%s: failed to set key "
- "(%d, %pM) to hardware (%d)\n",
- wiphy_name(key->local->hw.wiphy),
- key->conf.keyidx, sta ? sta->addr : bcast_addr, ret);
+ if (ret != -ENOSPC && ret != -EOPNOTSUPP)
+ wiphy_err(key->local->hw.wiphy,
+ "failed to set key (%d, %pM) to hardware (%d)\n",
+ key->conf.keyidx, sta ? sta->addr : bcast_addr, ret);
+
+ out_unsupported:
+ switch (key->conf.cipher) {
+ case WLAN_CIPHER_SUITE_WEP40:
+ case WLAN_CIPHER_SUITE_WEP104:
+ case WLAN_CIPHER_SUITE_TKIP:
+ case WLAN_CIPHER_SUITE_CCMP:
+ case WLAN_CIPHER_SUITE_AES_CMAC:
+ /* all of these we can do in software */
+ return 0;
+ default:
+ return -EINVAL;
+ }
}
static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key)
sta, &key->conf);
if (ret)
- printk(KERN_ERR "mac80211-%s: failed to remove key "
- "(%d, %pM) from hardware (%d)\n",
- wiphy_name(key->local->hw.wiphy),
- key->conf.keyidx, sta ? sta->addr : bcast_addr, ret);
+ wiphy_err(key->local->hw.wiphy,
+ "failed to remove key (%d, %pM) from hardware (%d)\n",
+ key->conf.keyidx, sta ? sta->addr : bcast_addr, ret);
key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
}
+void ieee80211_key_removed(struct ieee80211_key_conf *key_conf)
+{
+ struct ieee80211_key *key;
+
+ key = container_of(key_conf, struct ieee80211_key, conf);
+
+ might_sleep();
+ assert_key_lock(key->local);
+
+ key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
+
+ /*
+ * Flush TX path to avoid attempts to use this key
+ * after this function returns. Until then, drivers
+ * must be prepared to handle the key.
+ */
+ synchronize_rcu();
+}
+EXPORT_SYMBOL_GPL(ieee80211_key_removed);
+
static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata,
int idx)
{
static void __ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
+ bool pairwise,
struct ieee80211_key *old,
struct ieee80211_key *new)
{
if (new)
list_add(&new->list, &sdata->key_list);
- if (sta) {
- rcu_assign_pointer(sta->key, new);
+ if (sta && pairwise) {
+ rcu_assign_pointer(sta->ptk, new);
+ } else if (sta) {
+ if (old)
+ idx = old->conf.keyidx;
+ else
+ idx = new->conf.keyidx;
+ rcu_assign_pointer(sta->gtk[idx], new);
} else {
WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx);
}
}
-struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
- int idx,
- size_t key_len,
+struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
const u8 *key_data,
size_t seq_len, const u8 *seq)
{
struct ieee80211_key *key;
- int i, j;
+ int i, j, err;
BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS);
key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL);
if (!key)
- return NULL;
+ return ERR_PTR(-ENOMEM);
/*
* Default to software encryption; we'll later upload the
key->conf.flags = 0;
key->flags = 0;
- key->conf.alg = alg;
+ key->conf.cipher = cipher;
key->conf.keyidx = idx;
key->conf.keylen = key_len;
- switch (alg) {
- case ALG_WEP:
+ switch (cipher) {
+ case WLAN_CIPHER_SUITE_WEP40:
+ case WLAN_CIPHER_SUITE_WEP104:
key->conf.iv_len = WEP_IV_LEN;
key->conf.icv_len = WEP_ICV_LEN;
break;
- case ALG_TKIP:
+ case WLAN_CIPHER_SUITE_TKIP:
key->conf.iv_len = TKIP_IV_LEN;
key->conf.icv_len = TKIP_ICV_LEN;
if (seq) {
}
}
break;
- case ALG_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP:
key->conf.iv_len = CCMP_HDR_LEN;
key->conf.icv_len = CCMP_MIC_LEN;
if (seq) {
key->u.ccmp.rx_pn[i][j] =
seq[CCMP_PN_LEN - j - 1];
}
- break;
- case ALG_AES_CMAC:
- key->conf.iv_len = 0;
- key->conf.icv_len = sizeof(struct ieee80211_mmie);
- if (seq)
- for (j = 0; j < 6; j++)
- key->u.aes_cmac.rx_pn[j] = seq[6 - j - 1];
- break;
- }
- memcpy(key->conf.key, key_data, key_len);
- INIT_LIST_HEAD(&key->list);
-
- if (alg == ALG_CCMP) {
/*
* Initialize AES key state here as an optimization so that
* it does not need to be initialized for every packet.
*/
key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data);
- if (!key->u.ccmp.tfm) {
+ if (IS_ERR(key->u.ccmp.tfm)) {
+ err = PTR_ERR(key->u.ccmp.tfm);
kfree(key);
- return NULL;
+ key = ERR_PTR(err);
}
- }
-
- if (alg == ALG_AES_CMAC) {
+ break;
+ case WLAN_CIPHER_SUITE_AES_CMAC:
+ key->conf.iv_len = 0;
+ key->conf.icv_len = sizeof(struct ieee80211_mmie);
+ if (seq)
+ for (j = 0; j < 6; j++)
+ key->u.aes_cmac.rx_pn[j] = seq[6 - j - 1];
/*
* Initialize AES key state here as an optimization so that
* it does not need to be initialized for every packet.
*/
key->u.aes_cmac.tfm =
ieee80211_aes_cmac_key_setup(key_data);
- if (!key->u.aes_cmac.tfm) {
+ if (IS_ERR(key->u.aes_cmac.tfm)) {
+ err = PTR_ERR(key->u.aes_cmac.tfm);
kfree(key);
- return NULL;
+ key = ERR_PTR(err);
}
+ break;
}
+ memcpy(key->conf.key, key_data, key_len);
+ INIT_LIST_HEAD(&key->list);
return key;
}
if (key->local)
ieee80211_key_disable_hw_accel(key);
- if (key->conf.alg == ALG_CCMP)
+ if (key->conf.cipher == WLAN_CIPHER_SUITE_CCMP)
ieee80211_aes_key_free(key->u.ccmp.tfm);
- if (key->conf.alg == ALG_AES_CMAC)
+ if (key->conf.cipher == WLAN_CIPHER_SUITE_AES_CMAC)
ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm);
if (key->local)
ieee80211_debugfs_key_remove(key);
kfree(key);
}
-void ieee80211_key_link(struct ieee80211_key *key,
- struct ieee80211_sub_if_data *sdata,
- struct sta_info *sta)
+int ieee80211_key_link(struct ieee80211_key *key,
+ struct ieee80211_sub_if_data *sdata,
+ struct sta_info *sta)
{
struct ieee80211_key *old_key;
- int idx;
+ int idx, ret;
+ bool pairwise = key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE;
BUG_ON(!sdata);
BUG_ON(!key);
*/
if (test_sta_flags(sta, WLAN_STA_WME))
key->conf.flags |= IEEE80211_KEY_FLAG_WMM_STA;
-
- /*
- * This key is for a specific sta interface,
- * inform the driver that it should try to store
- * this key as pairwise key.
- */
- key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;
} else {
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
struct sta_info *ap;
mutex_lock(&sdata->local->key_mtx);
- if (sta)
- old_key = sta->key;
+ if (sta && pairwise)
+ old_key = sta->ptk;
+ else if (sta)
+ old_key = sta->gtk[idx];
else
old_key = sdata->keys[idx];
- __ieee80211_key_replace(sdata, sta, old_key, key);
+ __ieee80211_key_replace(sdata, sta, pairwise, old_key, key);
__ieee80211_key_destroy(old_key);
ieee80211_debugfs_key_add(key);
- ieee80211_key_enable_hw_accel(key);
+ ret = ieee80211_key_enable_hw_accel(key);
mutex_unlock(&sdata->local->key_mtx);
+
+ return ret;
}
static void __ieee80211_key_free(struct ieee80211_key *key)
*/
if (key->sdata)
__ieee80211_key_replace(key->sdata, key->sta,
- key, NULL);
+ key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
+ key, NULL);
__ieee80211_key_destroy(key);
}
projects / mv-sheeva.git / blobdiff