iwlwifi: moves security functions to iwl-sta.c

This patch moves security related functions to iwl-sta.c.
Note that iwl4965_mac_update_tkip_key is still in iwl4965-base.c since it
is a mac80211 handler.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 118 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c
index 41238f208ed5..8765358c1a11 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.c
@@ -139,7 +139,7 @@ int iwl_set_default_wep_key(struct iwl_priv *priv,
         return ret;
 }
 
-int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
+static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
                                 struct ieee80211_key_conf *keyconf,
                                 u8 sta_id)
 {
@@ -186,3 +186,120 @@ int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
 
         return ret;
 }
+
+static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
+                                   struct ieee80211_key_conf *keyconf,
+                                   u8 sta_id)
+{
+        unsigned long flags;
+        __le16 key_flags = 0;
+
+        key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
+        key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
+        key_flags &= ~STA_KEY_FLG_INVALID;
+
+        if (sta_id == priv->hw_setting.bcast_sta_id)
+                key_flags |= STA_KEY_MULTICAST_MSK;
+
+        keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+        keyconf->hw_key_idx = keyconf->keyidx;
+
+        spin_lock_irqsave(&priv->sta_lock, flags);
+        priv->stations[sta_id].keyinfo.alg = keyconf->alg;
+        priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
+
+        memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
+               keyconf->keylen);
+
+        memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
+               keyconf->keylen);
+
+        priv->stations[sta_id].sta.key.key_offset =
+                                iwl_get_free_ucode_key_index(priv);
+        priv->stations[sta_id].sta.key.key_flags = key_flags;
+        priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
+        priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
+
+        spin_unlock_irqrestore(&priv->sta_lock, flags);
+
+        IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
+        return iwl4965_send_add_station(priv,
+                                &priv->stations[sta_id].sta, CMD_ASYNC);
+}
+
+static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
+                                   struct ieee80211_key_conf *keyconf,
+                                   u8 sta_id)
+{
+        unsigned long flags;
+        int ret = 0;
+
+        keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+        keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
+        keyconf->hw_key_idx = keyconf->keyidx;
+
+        spin_lock_irqsave(&priv->sta_lock, flags);
+
+        priv->stations[sta_id].keyinfo.alg = keyconf->alg;
+        priv->stations[sta_id].keyinfo.conf = keyconf;
+        priv->stations[sta_id].keyinfo.keylen = 16;
+
+        /* This copy is acutally not needed: we get the key with each TX */
+        memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
+
+        memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
+
+        spin_unlock_irqrestore(&priv->sta_lock, flags);
+
+        return ret;
+}
+
+int iwl_remove_dynamic_key(struct iwl_priv *priv, u8 sta_id)
+{
+        unsigned long flags;
+
+        priv->key_mapping_key = 0;
+
+        spin_lock_irqsave(&priv->sta_lock, flags);
+        if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
+                &priv->ucode_key_table))
+                IWL_ERROR("index %d not used in uCode key table.\n",
+                        priv->stations[sta_id].sta.key.key_offset);
+        memset(&priv->stations[sta_id].keyinfo, 0,
+                                        sizeof(struct iwl4965_hw_key));
+        memset(&priv->stations[sta_id].sta.key, 0,
+                                        sizeof(struct iwl4965_keyinfo));
+        priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
+        priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
+        priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
+        spin_unlock_irqrestore(&priv->sta_lock, flags);
+
+        IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
+        return iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
+}
+
+int iwl_set_dynamic_key(struct iwl_priv *priv,
+                                struct ieee80211_key_conf *key, u8 sta_id)
+{
+        int ret;
+
+        priv->key_mapping_key = 1;
+
+        switch (key->alg) {
+        case ALG_CCMP:
+                ret = iwl_set_ccmp_dynamic_key_info(priv, key, sta_id);
+                break;
+        case ALG_TKIP:
+                ret = iwl_set_tkip_dynamic_key_info(priv, key, sta_id);
+                break;
+        case ALG_WEP:
+                ret = iwl_set_wep_dynamic_key_info(priv, key, sta_id);
+                break;
+        default:
+                IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, key->alg);
+                ret = -EINVAL;
+        }
+
+        return ret;
+}
+