From: Jérôme Pouiller <jerome.pouiller@xxxxxxxxxx>
Signed-off-by: Jérôme Pouiller <jerome.pouiller@xxxxxxxxxx>
---
drivers/staging/wfx/Makefile | 1 +
drivers/staging/wfx/key.c | 272 +++++++++++++++++++++++++++++++++++
drivers/staging/wfx/key.h | 22 +++
drivers/staging/wfx/main.c | 2 +
drivers/staging/wfx/sta.c | 4 +
drivers/staging/wfx/wfx.h | 19 +++
6 files changed, 320 insertions(+)
create mode 100644 drivers/staging/wfx/key.c
create mode 100644 drivers/staging/wfx/key.h
diff --git a/drivers/staging/wfx/Makefile b/drivers/staging/wfx/Makefile
index 2b8a5fa86fac..0d9c1ed092f6 100644
--- a/drivers/staging/wfx/Makefile
+++ b/drivers/staging/wfx/Makefile
@@ -14,6 +14,7 @@ wfx-y := \
data_rx.o \
scan.o \
sta.o \
+ key.o \
main.o \
sta.o \
debug.o
diff --git a/drivers/staging/wfx/key.c b/drivers/staging/wfx/key.c
new file mode 100644
index 000000000000..696424f244cb
--- /dev/null
+++ b/drivers/staging/wfx/key.c
@@ -0,0 +1,272 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Key management related functions.
+ *
+ * Copyright (c) 2017-2019, Silicon Laboratories, Inc.
+ * Copyright (c) 2010, ST-Ericsson
+ */
+#include <linux/version.h>
+#include <net/mac80211.h>
+
+#include "key.h"
+#include "wfx.h"
+#include "hif_tx_mib.h"
+
+static int wfx_alloc_key(struct wfx_dev *wdev)
+{
+ int idx;
+
+ idx = ffs(~wdev->key_map) - 1;
+ if (idx < 0 || idx >= MAX_KEY_ENTRIES)
+ return -1;
+
+ wdev->key_map |= BIT(idx);
+ wdev->keys[idx].entry_index = idx;
+ return idx;
+}
+
+static void wfx_free_key(struct wfx_dev *wdev, int idx)
+{
+ BUG_ON(!(wdev->key_map & BIT(idx)));
+ memset(&wdev->keys[idx], 0, sizeof(wdev->keys[idx]));
+ wdev->key_map &= ~BIT(idx);
+}
+
+static uint8_t fill_wep_pair(struct hif_wep_pairwise_key *msg,
+ struct ieee80211_key_conf *key, u8 *peer_addr)
+{
+ WARN_ON(key->keylen > sizeof(msg->key_data));
+ msg->key_length = key->keylen;
+ memcpy(msg->key_data, key->key, key->keylen);
+ ether_addr_copy(msg->peer_address, peer_addr);
+ return HIF_KEY_TYPE_WEP_PAIRWISE;
+}
+
+static uint8_t fill_wep_group(struct hif_wep_group_key *msg,
+ struct ieee80211_key_conf *key)
+{
+ WARN_ON(key->keylen > sizeof(msg->key_data));
+ msg->key_id = key->keyidx;
+ msg->key_length = key->keylen;
+ memcpy(msg->key_data, key->key, key->keylen);
+ return HIF_KEY_TYPE_WEP_DEFAULT;
+}
+
+static uint8_t fill_tkip_pair(struct hif_tkip_pairwise_key *msg,
+ struct ieee80211_key_conf *key, u8 *peer_addr)
+{
+ uint8_t *keybuf = key->key;
+
+ WARN_ON(key->keylen != sizeof(msg->tkip_key_data)
+ + sizeof(msg->tx_mic_key)
+ + sizeof(msg->rx_mic_key));
+ memcpy(msg->tkip_key_data, keybuf, sizeof(msg->tkip_key_data));
+ keybuf += sizeof(msg->tkip_key_data);
+ memcpy(msg->tx_mic_key, keybuf, sizeof(msg->tx_mic_key));
+ keybuf += sizeof(msg->tx_mic_key);
+ memcpy(msg->rx_mic_key, keybuf, sizeof(msg->rx_mic_key));
+ ether_addr_copy(msg->peer_address, peer_addr);
+ return HIF_KEY_TYPE_TKIP_PAIRWISE;
+}
+
+static uint8_t fill_tkip_group(struct hif_tkip_group_key *msg,
+ struct ieee80211_key_conf *key,
+ struct ieee80211_key_seq *seq,
+ enum nl80211_iftype iftype)
+{
+ uint8_t *keybuf = key->key;
+
+ WARN_ON(key->keylen != sizeof(msg->tkip_key_data)
+ + 2 * sizeof(msg->rx_mic_key));
+ msg->key_id = key->keyidx;
+ memcpy(msg->rx_sequence_counter, &seq->tkip.iv16, sizeof(seq->tkip.iv16));
+ memcpy(msg->rx_sequence_counter + sizeof(uint16_t), &seq->tkip.iv32, sizeof(seq->tkip.iv32));
+ memcpy(msg->tkip_key_data, keybuf, sizeof(msg->tkip_key_data));
+ keybuf += sizeof(msg->tkip_key_data);
+ if (iftype == NL80211_IFTYPE_AP)
+ // Use Tx MIC Key
+ memcpy(msg->rx_mic_key, keybuf + 0, sizeof(msg->rx_mic_key));
+ else
+ // Use Rx MIC Key
+ memcpy(msg->rx_mic_key, keybuf + 8, sizeof(msg->rx_mic_key));
+ return HIF_KEY_TYPE_TKIP_GROUP;
+}
+
+static uint8_t fill_ccmp_pair(struct hif_aes_pairwise_key *msg,
+ struct ieee80211_key_conf *key, u8 *peer_addr)
+{
+ WARN_ON(key->keylen != sizeof(msg->aes_key_data));
+ ether_addr_copy(msg->peer_address, peer_addr);
+ memcpy(msg->aes_key_data, key->key, key->keylen);
+ return HIF_KEY_TYPE_AES_PAIRWISE;
+}
+
+static uint8_t fill_ccmp_group(struct hif_aes_group_key *msg,
+ struct ieee80211_key_conf *key,
+ struct ieee80211_key_seq *seq)
+{
+ WARN_ON(key->keylen != sizeof(msg->aes_key_data));
+ memcpy(msg->aes_key_data, key->key, key->keylen);
+ memcpy(msg->rx_sequence_counter, seq->ccmp.pn, sizeof(seq->ccmp.pn));
+ memreverse(msg->rx_sequence_counter, sizeof(seq->ccmp.pn));
+ msg->key_id = key->keyidx;
+ return HIF_KEY_TYPE_AES_GROUP;
+}
+
+static uint8_t fill_sms4_pair(struct hif_wapi_pairwise_key *msg,
+ struct ieee80211_key_conf *key, u8 *peer_addr)
+{
+ uint8_t *keybuf = key->key;
+
+ WARN_ON(key->keylen != sizeof(msg->wapi_key_data)
+ + sizeof(msg->mic_key_data));
+ ether_addr_copy(msg->peer_address, peer_addr);
+ memcpy(msg->wapi_key_data, keybuf, sizeof(msg->wapi_key_data));
+ keybuf += sizeof(msg->wapi_key_data);
+ memcpy(msg->mic_key_data, keybuf, sizeof(msg->mic_key_data));
+ msg->key_id = key->keyidx;
+ return HIF_KEY_TYPE_WAPI_PAIRWISE;
+}
+
+static uint8_t fill_sms4_group(struct hif_wapi_group_key *msg,
+ struct ieee80211_key_conf *key)
+{
+ uint8_t *keybuf = key->key;
+
+ WARN_ON(key->keylen != sizeof(msg->wapi_key_data)
+ + sizeof(msg->mic_key_data));
+ memcpy(msg->wapi_key_data, keybuf, sizeof(msg->wapi_key_data));
+ keybuf += sizeof(msg->wapi_key_data);
+ memcpy(msg->mic_key_data, keybuf, sizeof(msg->mic_key_data));
+ msg->key_id = key->keyidx;
+ return HIF_KEY_TYPE_WAPI_GROUP;
+}
+
+static uint8_t fill_aes_cmac_group(struct hif_igtk_group_key *msg,
+ struct ieee80211_key_conf *key,
+ struct ieee80211_key_seq *seq)
+{
+ WARN_ON(key->keylen != sizeof(msg->igtk_key_data));
+ memcpy(msg->igtk_key_data, key->key, key->keylen);
+ memcpy(msg->ipn, seq->aes_cmac.pn, sizeof(seq->aes_cmac.pn));
+ memreverse(msg->ipn, sizeof(seq->aes_cmac.pn));
+ msg->key_id = key->keyidx;
+ return HIF_KEY_TYPE_IGTK_GROUP;
+}
+
+static int wfx_add_key(struct wfx_vif *wvif, struct ieee80211_sta *sta,
+ struct ieee80211_key_conf *key)
+{
+ int ret;
+ struct hif_req_add_key *k;
+ struct ieee80211_key_seq seq;
+ struct wfx_dev *wdev = wvif->wdev;
+ int idx = wfx_alloc_key(wvif->wdev);
+ bool pairwise = key->flags & IEEE80211_KEY_FLAG_PAIRWISE;
+
+ WARN_ON(key->flags & IEEE80211_KEY_FLAG_PAIRWISE && !sta);
+ ieee80211_get_key_rx_seq(key, 0, &seq);
+ if (idx < 0)
+ return -EINVAL;
+ k = &wdev->keys[idx];
+ k->int_id = wvif->id;
+ if (key->cipher == WLAN_CIPHER_SUITE_WEP40 || key->cipher == WLAN_CIPHER_SUITE_WEP104) {
+ if (pairwise)
+ k->type = fill_wep_pair(&k->key.wep_pairwise_key, key, sta->addr);
+ else
+ k->type = fill_wep_group(&k->key.wep_group_key, key);
+ } else if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
+ if (pairwise)
+ k->type = fill_tkip_pair(&k->key.tkip_pairwise_key, key, sta->addr);
+ else
+ k->type = fill_tkip_group(&k->key.tkip_group_key, key, &seq, wvif->vif->type);
+ } else if (key->cipher == WLAN_CIPHER_SUITE_CCMP) {
+ if (pairwise)
+ k->type = fill_ccmp_pair(&k->key.aes_pairwise_key, key, sta->addr);
+ else
+ k->type = fill_ccmp_group(&k->key.aes_group_key, key, &seq);
+ } else if (key->cipher == WLAN_CIPHER_SUITE_SMS4) {
+ if (pairwise)
+ k->type = fill_sms4_pair(&k->key.wapi_pairwise_key, key, sta->addr);
+ else
+ k->type = fill_sms4_group(&k->key.wapi_group_key, key);
+ } else if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
+ k->type = fill_aes_cmac_group(&k->key.igtk_group_key, key, &seq);
+ } else {
+ dev_warn(wdev->dev, "unsupported key type %d\n", key->cipher);
+ wfx_free_key(wdev, idx);
+ return -EOPNOTSUPP;
+ }
+ ret = hif_add_key(wdev, k);
+ if (ret) {
+#if KERNEL_VERSION(4, 14, 0) > LINUX_VERSION_CODE && \
+ KERNEL_VERSION(4, 9, 63) > LINUX_VERSION_CODE && \
+ KERNEL_VERSION(4, 4, 99) > LINUX_VERSION_CODE
+ if (ret == HIF_INVALID_PARAMETER) {
+ // Use a patched kernel in order to solve this error
+ dev_warn(wdev->dev, "chip prevents re-installation of same key\n");
+ dev_warn(wdev->dev, "your kernel is not patched to protect against KRACK attack\n");
+ }
+#endif
+ wfx_free_key(wdev, idx);
+ return -EOPNOTSUPP;
+ }
+#if (KERNEL_VERSION(3, 19, 0) > LINUX_VERSION_CODE)
+ key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
+#else
+ key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE |
+ IEEE80211_KEY_FLAG_RESERVE_TAILROOM;
+#endif
+ key->hw_key_idx = idx;
+ return 0;
+}
+
+static int wfx_remove_key(struct wfx_vif *wvif, struct ieee80211_key_conf *key)
+{
+ WARN(key->hw_key_idx >= MAX_KEY_ENTRIES, "corrupted hw_key_idx");
+ wfx_free_key(wvif->wdev, key->hw_key_idx);
+ return hif_remove_key(wvif->wdev, key->hw_key_idx);
+}
+
+int wfx_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
+ struct ieee80211_vif *vif, struct ieee80211_sta *sta,
+ struct ieee80211_key_conf *key)
+{
+ int ret = -EOPNOTSUPP;
+ struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
+
+ mutex_lock(&wvif->wdev->conf_mutex);
+ if (cmd == SET_KEY)
+ ret = wfx_add_key(wvif, sta, key);
+ if (cmd == DISABLE_KEY)
+ ret = wfx_remove_key(wvif, key);
+ mutex_unlock(&wvif->wdev->conf_mutex);
+ return ret;
+}
+
+int wfx_upload_keys(struct wfx_vif *wvif)
+{
+ int i;
+ struct hif_req_add_key *key;
+ struct wfx_dev *wdev = wvif->wdev;
+
+ for (i = 0; i < ARRAY_SIZE(wdev->keys); i++) {
+ if (wdev->key_map & BIT(i)) {
+ key = &wdev->keys[i];
+ if (key->int_id == wvif->id)
+ hif_add_key(wdev, key);
+ }
+ }
+ return 0;
+}
+
+void wfx_wep_key_work(struct work_struct *work)
+{
+ struct wfx_vif *wvif = container_of(work, struct wfx_vif, wep_key_work);
+
+ wfx_tx_flush(wvif->wdev);
+ hif_wep_default_key_id(wvif, wvif->wep_default_key_id);
+ wfx_pending_requeue(wvif->wdev, wvif->wep_pending_skb);
+ wvif->wep_pending_skb = NULL;
+ wfx_tx_unlock(wvif->wdev);
+}
diff --git a/drivers/staging/wfx/key.h b/drivers/staging/wfx/key.h
new file mode 100644
index 000000000000..9436ccdf4d3b
--- /dev/null
+++ b/drivers/staging/wfx/key.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Implementation of mac80211 API.
+ *
+ * Copyright (c) 2017-2019, Silicon Laboratories, Inc.
+ * Copyright (c) 2010, ST-Ericsson
+ */
+#ifndef WFX_KEY_H
+#define WFX_KEY_H
+
+#include <net/mac80211.h>
+
+struct wfx_dev;
+struct wfx_vif;
+
+int wfx_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
+ struct ieee80211_vif *vif, struct ieee80211_sta *sta,
+ struct ieee80211_key_conf *key);
+int wfx_upload_keys(struct wfx_vif *wvif);
+void wfx_wep_key_work(struct work_struct *work);
+
+#endif /* WFX_STA_H */
diff --git a/drivers/staging/wfx/main.c b/drivers/staging/wfx/main.c
index 06220bac5b75..e7bba24aae0b 100644
--- a/drivers/staging/wfx/main.c
+++ b/drivers/staging/wfx/main.c
@@ -27,6 +27,7 @@
#include "bus.h"
#include "bh.h"
#include "sta.h"
+#include "key.h"
#include "debug.h"
#include "data_tx.h"
#include "secure_link.h"
@@ -56,6 +57,7 @@ static const struct ieee80211_ops wfx_ops = {
.remove_interface = wfx_remove_interface,
.tx = wfx_tx,
.hw_scan = wfx_hw_scan,
+ .set_key = wfx_set_key,
};
bool wfx_api_older_than(struct wfx_dev *wdev, int major, int minor)
diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c
index c9a35a5307dd..ccf45bdb7e42 100644
--- a/drivers/staging/wfx/sta.c
+++ b/drivers/staging/wfx/sta.c
@@ -10,6 +10,7 @@
#include "sta.h"
#include "wfx.h"
+#include "key.h"
#include "scan.h"
#include "hif_tx_mib.h"
@@ -172,6 +173,9 @@ int wfx_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
timer_setup(&wvif->mcast_timeout, wfx_mcast_timeout, 0);
#endif
+ wvif->wep_default_key_id = -1;
+ INIT_WORK(&wvif->wep_key_work, wfx_wep_key_work);
+
sema_init(&wvif->scan.lock, 1);
INIT_WORK(&wvif->scan.work, wfx_scan_work);
INIT_DELAYED_WORK(&wvif->scan.timeout, wfx_scan_timeout);
diff --git a/drivers/staging/wfx/wfx.h b/drivers/staging/wfx/wfx.h
index a6b430ee7cdf..ba5e1a32d869 100644
--- a/drivers/staging/wfx/wfx.h
+++ b/drivers/staging/wfx/wfx.h
@@ -69,6 +69,9 @@ struct wfx_dev {
int tx_burst_idx;
atomic_t tx_lock;
+ u32 key_map;
+ struct hif_req_add_key keys[MAX_KEY_ENTRIES];
+
struct hif_rx_stats rx_stats;
struct mutex rx_stats_lock;
@@ -94,6 +97,9 @@ struct wfx_vif {
struct work_struct mcast_start_work;
struct work_struct mcast_stop_work;
+ s8 wep_default_key_id;
+ struct sk_buff *wep_pending_skb;
+ struct work_struct wep_key_work;
struct tx_policy_cache tx_policy_cache;
struct work_struct tx_policy_upload_work;
@@ -141,6 +147,19 @@ static inline struct wfx_vif *wvif_iterate(struct wfx_dev *wdev, struct wfx_vif
return NULL;
}
+static inline void memreverse(uint8_t *src, uint8_t length)
+{
+ uint8_t *lo = src;
+ uint8_t *hi = src + length - 1;
+ uint8_t swap;
+
+ while (lo < hi) {
+ swap = *lo;
+ *lo++ = *hi;
+ *hi-- = swap;
+ }
+}
+
static inline int memzcmp(void *src, unsigned int size)
{
uint8_t *buf = src;
--
2.20.1
