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-rw-r--r--include/linux/nl80211.h36
-rw-r--r--net/wireless/nl80211.c203
2 files changed, 192 insertions, 47 deletions
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index e496a2d..48e0913 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -567,6 +567,9 @@ enum nl80211_commands {
* @NL80211_ATTR_PREV_BSSID: previous BSSID, to be used by in ASSOCIATE
* commands to specify using a reassociate frame
*
+ * @NL80211_ATTR_KEY: key information in a nested attribute with
+ * %NL80211_KEY_* sub-attributes
+ *
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@@ -692,6 +695,8 @@ enum nl80211_attrs {
NL80211_ATTR_PREV_BSSID,
+ NL80211_ATTR_KEY,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -720,6 +725,7 @@ enum nl80211_attrs {
#define NL80211_ATTR_CIPHER_SUITE_GROUP NL80211_ATTR_CIPHER_SUITE_GROUP
#define NL80211_ATTR_WPA_VERSIONS NL80211_ATTR_WPA_VERSIONS
#define NL80211_ATTR_AKM_SUITES NL80211_ATTR_AKM_SUITES
+#define NL80211_ATTR_KEY NL80211_ATTR_KEY
#define NL80211_MAX_SUPP_RATES 32
#define NL80211_MAX_SUPP_REG_RULES 32
@@ -1320,4 +1326,34 @@ enum nl80211_wpa_versions {
NL80211_WPA_VERSION_2 = 1 << 1,
};
+/**
+ * enum nl80211_key_attributes - key attributes
+ * @__NL80211_KEY_INVALID: invalid
+ * @NL80211_KEY_DATA: (temporal) key data; for TKIP this consists of
+ * 16 bytes encryption key followed by 8 bytes each for TX and RX MIC
+ * keys
+ * @NL80211_KEY_IDX: key ID (u8, 0-3)
+ * @NL80211_KEY_CIPHER: key cipher suite (u32, as defined by IEEE 802.11
+ * section 7.3.2.25.1, e.g. 0x000FAC04)
+ * @NL80211_KEY_SEQ: transmit key sequence number (IV/PN) for TKIP and
+ * CCMP keys, each six bytes in little endian
+ * @NL80211_KEY_DEFAULT: flag indicating default key
+ * @NL80211_KEY_DEFAULT_MGMT: flag indicating default management key
+ * @__NL80211_KEY_AFTER_LAST: internal
+ * @NL80211_KEY_MAX: highest key attribute
+ */
+enum nl80211_key_attributes {
+ __NL80211_KEY_INVALID,
+ NL80211_KEY_DATA,
+ NL80211_KEY_IDX,
+ NL80211_KEY_CIPHER,
+ NL80211_KEY_SEQ,
+ NL80211_KEY_DEFAULT,
+ NL80211_KEY_DEFAULT_MGMT,
+
+ /* keep last */
+ __NL80211_KEY_AFTER_LAST,
+ NL80211_KEY_MAX = __NL80211_KEY_AFTER_LAST - 1
+};
+
#endif /* __LINUX_NL80211_H */
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index a00fd64..50cf593 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -73,6 +73,7 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
[NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
[NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
+ [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
[NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
.len = WLAN_MAX_KEY_LEN },
[NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
@@ -134,6 +135,18 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
};
+/* policy for the attributes */
+static struct nla_policy
+nl80211_key_policy[NL80211_KEY_MAX + 1] __read_mostly = {
+ [NL80211_KEY_DATA] = { .type = NLA_BINARY,
+ .len = WLAN_MAX_KEY_LEN },
+ [NL80211_KEY_IDX] = { .type = NLA_U8 },
+ [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
+ [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
+ [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
+ [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
+};
+
/* IE validation */
static bool is_valid_ie_attr(const struct nlattr *attr)
{
@@ -198,6 +211,100 @@ static int nl80211_msg_put_channel(struct sk_buff *msg,
/* netlink command implementations */
+struct key_parse {
+ struct key_params p;
+ int idx;
+ bool def, defmgmt;
+};
+
+static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
+{
+ struct nlattr *tb[NL80211_KEY_MAX + 1];
+ int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
+ nl80211_key_policy);
+ if (err)
+ return err;
+
+ k->def = !!tb[NL80211_KEY_DEFAULT];
+ k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
+
+ if (tb[NL80211_KEY_IDX])
+ k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
+
+ if (tb[NL80211_KEY_DATA]) {
+ k->p.key = nla_data(tb[NL80211_KEY_DATA]);
+ k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
+ }
+
+ if (tb[NL80211_KEY_SEQ]) {
+ k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
+ k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
+ }
+
+ if (tb[NL80211_KEY_CIPHER])
+ k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
+
+ return 0;
+}
+
+static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
+{
+ if (info->attrs[NL80211_ATTR_KEY_DATA]) {
+ k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
+ k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
+ }
+
+ if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
+ k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
+ k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
+ }
+
+ if (info->attrs[NL80211_ATTR_KEY_IDX])
+ k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
+
+ if (info->attrs[NL80211_ATTR_KEY_CIPHER])
+ k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
+
+ k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
+ k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
+
+ return 0;
+}
+
+static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
+{
+ int err;
+
+ memset(k, 0, sizeof(*k));
+ k->idx = -1;
+
+ if (info->attrs[NL80211_ATTR_KEY])
+ err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
+ else
+ err = nl80211_parse_key_old(info, k);
+
+ if (err)
+ return err;
+
+ if (k->def && k->defmgmt)
+ return -EINVAL;
+
+ if (k->idx != -1) {
+ if (k->defmgmt) {
+ if (k->idx < 4 || k->idx > 5)
+ return -EINVAL;
+ } else if (k->def) {
+ if (k->idx < 0 || k->idx > 3)
+ return -EINVAL;
+ } else {
+ if (k->idx < 0 || k->idx > 5)
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
struct cfg80211_registered_device *dev)
{
@@ -943,10 +1050,12 @@ static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
struct get_key_cookie {
struct sk_buff *msg;
int error;
+ int idx;
};
static void get_key_callback(void *c, struct key_params *params)
{
+ struct nlattr *key;
struct get_key_cookie *cookie = c;
if (params->key)
@@ -961,6 +1070,26 @@ static void get_key_callback(void *c, struct key_params *params)
NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
params->cipher);
+ key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
+ if (!key)
+ goto nla_put_failure;
+
+ if (params->key)
+ NLA_PUT(cookie->msg, NL80211_KEY_DATA,
+ params->key_len, params->key);
+
+ if (params->seq)
+ NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
+ params->seq_len, params->seq);
+
+ if (params->cipher)
+ NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
+ params->cipher);
+
+ NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
+
+ nla_nest_end(cookie->msg, key);
+
return;
nla_put_failure:
cookie->error = 1;
@@ -1014,6 +1143,7 @@ static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
}
cookie.msg = msg;
+ cookie.idx = key_idx;
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
@@ -1049,26 +1179,21 @@ static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
+ struct key_parse key;
int err;
struct net_device *dev;
- u8 key_idx;
int (*func)(struct wiphy *wiphy, struct net_device *netdev,
u8 key_index);
- if (!info->attrs[NL80211_ATTR_KEY_IDX])
- return -EINVAL;
-
- key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
+ err = nl80211_parse_key(info, &key);
+ if (err)
+ return err;
- if (info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]) {
- if (key_idx < 4 || key_idx > 5)
- return -EINVAL;
- } else if (key_idx > 3)
+ if (key.idx < 0)
return -EINVAL;
- /* currently only support setting default key */
- if (!info->attrs[NL80211_ATTR_KEY_DEFAULT] &&
- !info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT])
+ /* only support setting default key */
+ if (!key.def && !key.defmgmt)
return -EINVAL;
rtnl_lock();
@@ -1077,7 +1202,7 @@ static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
if (err)
goto unlock_rtnl;
- if (info->attrs[NL80211_ATTR_KEY_DEFAULT])
+ if (key.def)
func = rdev->ops->set_default_key;
else
func = rdev->ops->set_default_mgmt_key;
@@ -1087,13 +1212,13 @@ static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
goto out;
}
- err = func(&rdev->wiphy, dev, key_idx);
+ err = func(&rdev->wiphy, dev, key.idx);
#ifdef CONFIG_WIRELESS_EXT
if (!err) {
if (func == rdev->ops->set_default_key)
- dev->ieee80211_ptr->wext.default_key = key_idx;
+ dev->ieee80211_ptr->wext.default_key = key.idx;
else
- dev->ieee80211_ptr->wext.default_mgmt_key = key_idx;
+ dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
}
#endif
@@ -1112,34 +1237,20 @@ static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
struct cfg80211_registered_device *rdev;
int err, i;
struct net_device *dev;
- struct key_params params;
- u8 key_idx = 0;
+ struct key_parse key;
u8 *mac_addr = NULL;
- memset(&params, 0, sizeof(params));
+ err = nl80211_parse_key(info, &key);
+ if (err)
+ return err;
- if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
+ if (!key.p.key)
return -EINVAL;
- if (info->attrs[NL80211_ATTR_KEY_DATA]) {
- params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
- params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
- }
-
- if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
- params.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
- params.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
- }
-
- if (info->attrs[NL80211_ATTR_KEY_IDX])
- key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
-
- params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
-
if (info->attrs[NL80211_ATTR_MAC])
mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
- if (cfg80211_validate_key_settings(&params, key_idx, mac_addr))
+ if (cfg80211_validate_key_settings(&key.p, key.idx, mac_addr))
return -EINVAL;
rtnl_lock();
@@ -1149,7 +1260,7 @@ static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
goto unlock_rtnl;
for (i = 0; i < rdev->wiphy.n_cipher_suites; i++)
- if (params.cipher == rdev->wiphy.cipher_suites[i])
+ if (key.p.cipher == rdev->wiphy.cipher_suites[i])
break;
if (i == rdev->wiphy.n_cipher_suites) {
err = -EINVAL;
@@ -1161,7 +1272,7 @@ static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
goto out;
}
- err = rdev->ops->add_key(&rdev->wiphy, dev, key_idx, mac_addr, &params);
+ err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx, mac_addr, &key.p);
out:
cfg80211_unlock_rdev(rdev);
@@ -1177,14 +1288,12 @@ static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
struct cfg80211_registered_device *rdev;
int err;
struct net_device *dev;
- u8 key_idx = 0;
u8 *mac_addr = NULL;
+ struct key_parse key;
- if (info->attrs[NL80211_ATTR_KEY_IDX])
- key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
-
- if (key_idx > 5)
- return -EINVAL;
+ err = nl80211_parse_key(info, &key);
+ if (err)
+ return err;
if (info->attrs[NL80211_ATTR_MAC])
mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
@@ -1200,13 +1309,13 @@ static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
goto out;
}
- err = rdev->ops->del_key(&rdev->wiphy, dev, key_idx, mac_addr);
+ err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
#ifdef CONFIG_WIRELESS_EXT
if (!err) {
- if (key_idx == dev->ieee80211_ptr->wext.default_key)
+ if (key.idx == dev->ieee80211_ptr->wext.default_key)
dev->ieee80211_ptr->wext.default_key = -1;
- else if (key_idx == dev->ieee80211_ptr->wext.default_mgmt_key)
+ else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
dev->ieee80211_ptr->wext.default_mgmt_key = -1;
}
#endif
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