mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-19 00:57:31 +02:00
5fe95d1b66
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9554 3c298f89-4303-0410-b956-a3cf2f4a3e73
471 lines
12 KiB
Diff
471 lines
12 KiB
Diff
Subject: cfg80211/nl80211: introduce key handling
|
|
|
|
This introduces key handling to cfg80211/nl80211. Default
|
|
and group keys can be added, changed and removed; sequence
|
|
counters for each key can be retrieved.
|
|
|
|
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
|
|
|
|
---
|
|
include/linux/nl80211.h | 34 +++++
|
|
include/net/cfg80211.h | 44 +++++++
|
|
net/wireless/core.c | 3
|
|
net/wireless/nl80211.c | 289 ++++++++++++++++++++++++++++++++++++++++++++++++
|
|
4 files changed, 370 insertions(+)
|
|
|
|
--- everything.orig/include/linux/nl80211.h 2007-10-30 15:33:43.587381346 +0100
|
|
+++ everything/include/linux/nl80211.h 2007-11-07 13:19:37.861516599 +0100
|
|
@@ -37,6 +37,16 @@
|
|
* userspace to request deletion of a virtual interface, then requires
|
|
* attribute %NL80211_ATTR_IFINDEX.
|
|
*
|
|
+ * @NL80211_CMD_GET_KEY: Get sequence counter information for a key specified
|
|
+ * by %NL80211_ATTR_KEY_IDX and/or %NL80211_ATTR_MAC.
|
|
+ * @NL80211_CMD_SET_KEY: Set key attributes %NL80211_ATTR_KEY_DEFAULT or
|
|
+ * %NL80211_ATTR_KEY_THRESHOLD.
|
|
+ * @NL80211_CMD_NEW_KEY: add a key with given %NL80211_ATTR_KEY_DATA,
|
|
+ * %NL80211_ATTR_KEY_IDX, %NL80211_ATTR_MAC and %NL80211_ATTR_KEY_CIPHER
|
|
+ * attributes.
|
|
+ * @NL80211_CMD_DEL_KEY: delete a key identified by %NL80211_ATTR_KEY_IDX
|
|
+ * or %NL80211_ATTR_MAC.
|
|
+ *
|
|
* @NL80211_CMD_MAX: highest used command number
|
|
* @__NL80211_CMD_AFTER_LAST: internal use
|
|
*/
|
|
@@ -54,6 +64,11 @@ enum nl80211_commands {
|
|
NL80211_CMD_NEW_INTERFACE,
|
|
NL80211_CMD_DEL_INTERFACE,
|
|
|
|
+ NL80211_CMD_GET_KEY,
|
|
+ NL80211_CMD_SET_KEY,
|
|
+ NL80211_CMD_NEW_KEY,
|
|
+ NL80211_CMD_DEL_KEY,
|
|
+
|
|
/* add commands here */
|
|
|
|
/* used to define NL80211_CMD_MAX below */
|
|
@@ -75,6 +90,17 @@ enum nl80211_commands {
|
|
* @NL80211_ATTR_IFNAME: network interface name
|
|
* @NL80211_ATTR_IFTYPE: type of virtual interface, see &enum nl80211_iftype
|
|
*
|
|
+ * @NL80211_ATTR_MAC: MAC address (various uses)
|
|
+ *
|
|
+ * @NL80211_ATTR_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_ATTR_KEY_IDX: key ID (u8, 0-3)
|
|
+ * @NL80211_ATTR_KEY_CIPHER: key cipher suite (u32, as defined by IEEE 802.11
|
|
+ * section 7.3.2.25.1, e.g. 0x000FAC04)
|
|
+ * @NL80211_ATTR_KEY_SEQ: transmit key sequence number (IV/PN) for TKIP and
|
|
+ * CCMP keys, each six bytes in little endian
|
|
+ *
|
|
* @NL80211_ATTR_MAX: highest attribute number currently defined
|
|
* @__NL80211_ATTR_AFTER_LAST: internal use
|
|
*/
|
|
@@ -89,6 +115,14 @@ enum nl80211_attrs {
|
|
NL80211_ATTR_IFNAME,
|
|
NL80211_ATTR_IFTYPE,
|
|
|
|
+ NL80211_ATTR_MAC,
|
|
+
|
|
+ NL80211_ATTR_KEY_DATA,
|
|
+ NL80211_ATTR_KEY_IDX,
|
|
+ NL80211_ATTR_KEY_CIPHER,
|
|
+ NL80211_ATTR_KEY_SEQ,
|
|
+ NL80211_ATTR_KEY_DEFAULT,
|
|
+
|
|
/* add attributes here, update the policy in nl80211.c */
|
|
|
|
__NL80211_ATTR_AFTER_LAST,
|
|
--- everything.orig/net/wireless/nl80211.c 2007-10-30 15:33:43.637380153 +0100
|
|
+++ everything/net/wireless/nl80211.c 2007-11-07 13:19:38.201511066 +0100
|
|
@@ -61,6 +61,14 @@ static struct nla_policy nl80211_policy[
|
|
[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
|
|
[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
|
|
[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
|
|
+
|
|
+ [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
|
|
+
|
|
+ [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
|
|
+ .len = WLAN_MAX_KEY_LEN },
|
|
+ [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
|
|
+ [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
|
|
+ [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
|
|
};
|
|
|
|
/* message building helper */
|
|
@@ -335,6 +343,263 @@ static int nl80211_del_interface(struct
|
|
return err;
|
|
}
|
|
|
|
+struct get_key_cookie {
|
|
+ struct sk_buff *msg;
|
|
+ int error;
|
|
+};
|
|
+
|
|
+static void get_key_callback(void *c, struct key_params *params)
|
|
+{
|
|
+ struct get_key_cookie *cookie = c;
|
|
+
|
|
+ if (params->key)
|
|
+ NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
|
|
+ params->key_len, params->key);
|
|
+
|
|
+ if (params->seq)
|
|
+ NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
|
|
+ params->seq_len, params->seq);
|
|
+
|
|
+ if (params->cipher)
|
|
+ NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
|
|
+ params->cipher);
|
|
+
|
|
+ return;
|
|
+ nla_put_failure:
|
|
+ cookie->error = 1;
|
|
+}
|
|
+
|
|
+static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
|
|
+{
|
|
+ struct cfg80211_registered_device *drv;
|
|
+ int err;
|
|
+ struct net_device *dev;
|
|
+ u8 key_idx = 0;
|
|
+ u8 *mac_addr = NULL;
|
|
+ struct get_key_cookie cookie = {
|
|
+ .error = 0,
|
|
+ };
|
|
+ void *hdr;
|
|
+ struct sk_buff *msg;
|
|
+
|
|
+ if (info->attrs[NL80211_ATTR_KEY_IDX])
|
|
+ key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
|
|
+
|
|
+ if (key_idx > 3)
|
|
+ return -EINVAL;
|
|
+
|
|
+ if (info->attrs[NL80211_ATTR_MAC])
|
|
+ mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
|
|
+
|
|
+ err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
|
|
+ if (err)
|
|
+ return err;
|
|
+
|
|
+ if (!drv->ops->get_key) {
|
|
+ err = -EOPNOTSUPP;
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
+ if (!msg) {
|
|
+ err = -ENOMEM;
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
|
|
+ NL80211_CMD_NEW_KEY);
|
|
+
|
|
+ if (IS_ERR(hdr)) {
|
|
+ err = PTR_ERR(hdr);
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ cookie.msg = msg;
|
|
+
|
|
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
|
|
+ NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
|
|
+ if (mac_addr)
|
|
+ NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
|
|
+
|
|
+ rtnl_lock();
|
|
+ err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
|
|
+ &cookie, get_key_callback);
|
|
+ rtnl_unlock();
|
|
+
|
|
+ if (err)
|
|
+ goto out;
|
|
+
|
|
+ if (cookie.error)
|
|
+ goto nla_put_failure;
|
|
+
|
|
+ genlmsg_end(msg, hdr);
|
|
+ err = genlmsg_unicast(msg, info->snd_pid);
|
|
+ goto out;
|
|
+
|
|
+ nla_put_failure:
|
|
+ err = -ENOBUFS;
|
|
+ nlmsg_free(msg);
|
|
+ out:
|
|
+ cfg80211_put_dev(drv);
|
|
+ dev_put(dev);
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
|
|
+{
|
|
+ struct cfg80211_registered_device *drv;
|
|
+ int err;
|
|
+ struct net_device *dev;
|
|
+ u8 key_idx;
|
|
+
|
|
+ if (!info->attrs[NL80211_ATTR_KEY_IDX])
|
|
+ return -EINVAL;
|
|
+
|
|
+ key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
|
|
+
|
|
+ if (key_idx > 3)
|
|
+ return -EINVAL;
|
|
+
|
|
+ /* currently only support setting default key */
|
|
+ if (!info->attrs[NL80211_ATTR_KEY_DEFAULT])
|
|
+ return -EINVAL;
|
|
+
|
|
+ err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
|
|
+ if (err)
|
|
+ return err;
|
|
+
|
|
+ if (!drv->ops->set_default_key) {
|
|
+ err = -EOPNOTSUPP;
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ rtnl_lock();
|
|
+ err = drv->ops->set_default_key(&drv->wiphy, dev, key_idx);
|
|
+ rtnl_unlock();
|
|
+
|
|
+ out:
|
|
+ cfg80211_put_dev(drv);
|
|
+ dev_put(dev);
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
|
|
+{
|
|
+ struct cfg80211_registered_device *drv;
|
|
+ int err;
|
|
+ struct net_device *dev;
|
|
+ struct key_params params;
|
|
+ u8 key_idx = 0;
|
|
+ u8 *mac_addr = NULL;
|
|
+
|
|
+ memset(¶ms, 0, sizeof(params));
|
|
+
|
|
+ if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
|
|
+ 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_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 (key_idx > 3)
|
|
+ return -EINVAL;
|
|
+
|
|
+ /*
|
|
+ * Disallow pairwise keys with non-zero index unless it's WEP
|
|
+ * (because current deployments use pairwise WEP keys with
|
|
+ * non-zero indizes but 802.11i clearly specifies to use zero)
|
|
+ */
|
|
+ if (mac_addr && key_idx &&
|
|
+ params.cipher != WLAN_CIPHER_SUITE_WEP40 &&
|
|
+ params.cipher != WLAN_CIPHER_SUITE_WEP104)
|
|
+ return -EINVAL;
|
|
+
|
|
+ /* TODO: add definitions for the lengths to linux/ieee80211.h */
|
|
+ switch (params.cipher) {
|
|
+ case WLAN_CIPHER_SUITE_WEP40:
|
|
+ if (params.key_len != 5)
|
|
+ return -EINVAL;
|
|
+ break;
|
|
+ case WLAN_CIPHER_SUITE_TKIP:
|
|
+ if (params.key_len != 32)
|
|
+ return -EINVAL;
|
|
+ break;
|
|
+ case WLAN_CIPHER_SUITE_CCMP:
|
|
+ if (params.key_len != 16)
|
|
+ return -EINVAL;
|
|
+ break;
|
|
+ case WLAN_CIPHER_SUITE_WEP104:
|
|
+ if (params.key_len != 13)
|
|
+ return -EINVAL;
|
|
+ break;
|
|
+ default:
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
|
|
+ if (err)
|
|
+ return err;
|
|
+
|
|
+ if (!drv->ops->add_key) {
|
|
+ err = -EOPNOTSUPP;
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ rtnl_lock();
|
|
+ err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, ¶ms);
|
|
+ rtnl_unlock();
|
|
+
|
|
+ out:
|
|
+ cfg80211_put_dev(drv);
|
|
+ dev_put(dev);
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
|
|
+{
|
|
+ struct cfg80211_registered_device *drv;
|
|
+ int err;
|
|
+ struct net_device *dev;
|
|
+ u8 key_idx = 0;
|
|
+ u8 *mac_addr = NULL;
|
|
+
|
|
+ if (info->attrs[NL80211_ATTR_KEY_IDX])
|
|
+ key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
|
|
+
|
|
+ if (key_idx > 3)
|
|
+ return -EINVAL;
|
|
+
|
|
+ if (info->attrs[NL80211_ATTR_MAC])
|
|
+ mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
|
|
+
|
|
+ err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
|
|
+ if (err)
|
|
+ return err;
|
|
+
|
|
+ if (!drv->ops->del_key) {
|
|
+ err = -EOPNOTSUPP;
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ rtnl_lock();
|
|
+ err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);
|
|
+ rtnl_unlock();
|
|
+
|
|
+ out:
|
|
+ cfg80211_put_dev(drv);
|
|
+ dev_put(dev);
|
|
+ return err;
|
|
+}
|
|
+
|
|
static struct genl_ops nl80211_ops[] = {
|
|
{
|
|
.cmd = NL80211_CMD_GET_WIPHY,
|
|
@@ -374,6 +639,30 @@ static struct genl_ops nl80211_ops[] = {
|
|
.policy = nl80211_policy,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
+ {
|
|
+ .cmd = NL80211_CMD_GET_KEY,
|
|
+ .doit = nl80211_get_key,
|
|
+ .policy = nl80211_policy,
|
|
+ .flags = GENL_ADMIN_PERM,
|
|
+ },
|
|
+ {
|
|
+ .cmd = NL80211_CMD_SET_KEY,
|
|
+ .doit = nl80211_set_key,
|
|
+ .policy = nl80211_policy,
|
|
+ .flags = GENL_ADMIN_PERM,
|
|
+ },
|
|
+ {
|
|
+ .cmd = NL80211_CMD_NEW_KEY,
|
|
+ .doit = nl80211_new_key,
|
|
+ .policy = nl80211_policy,
|
|
+ .flags = GENL_ADMIN_PERM,
|
|
+ },
|
|
+ {
|
|
+ .cmd = NL80211_CMD_DEL_KEY,
|
|
+ .doit = nl80211_del_key,
|
|
+ .policy = nl80211_policy,
|
|
+ .flags = GENL_ADMIN_PERM,
|
|
+ },
|
|
};
|
|
|
|
/* multicast groups */
|
|
--- everything.orig/net/wireless/core.c 2007-10-30 15:33:43.677380478 +0100
|
|
+++ everything/net/wireless/core.c 2007-11-07 13:19:38.221513833 +0100
|
|
@@ -184,6 +184,9 @@ struct wiphy *wiphy_new(struct cfg80211_
|
|
struct cfg80211_registered_device *drv;
|
|
int alloc_size;
|
|
|
|
+ WARN_ON(!ops->add_key && ops->del_key);
|
|
+ WARN_ON(ops->add_key && !ops->del_key);
|
|
+
|
|
alloc_size = sizeof(*drv) + sizeof_priv;
|
|
|
|
drv = kzalloc(alloc_size, GFP_KERNEL);
|
|
--- everything.orig/include/net/cfg80211.h 2007-10-30 15:33:43.617381780 +0100
|
|
+++ everything/include/net/cfg80211.h 2007-11-07 13:19:38.231512748 +0100
|
|
@@ -49,6 +49,26 @@ extern int ieee80211_radiotap_iterator_n
|
|
struct ieee80211_radiotap_iterator *iterator);
|
|
|
|
|
|
+ /**
|
|
+ * struct key_params - key information
|
|
+ *
|
|
+ * Information about a key
|
|
+ *
|
|
+ * @key: key material
|
|
+ * @key_len: length of key material
|
|
+ * @cipher: cipher suite selector
|
|
+ * @seq: sequence counter (IV/PN) for TKIP and CCMP keys, only used
|
|
+ * with the get_key() callback, must be in little endian,
|
|
+ * length given by @seq_len.
|
|
+ */
|
|
+struct key_params {
|
|
+ u8 *key;
|
|
+ u8 *seq;
|
|
+ int key_len;
|
|
+ int seq_len;
|
|
+ u32 cipher;
|
|
+};
|
|
+
|
|
/* from net/wireless.h */
|
|
struct wiphy;
|
|
|
|
@@ -71,6 +91,18 @@ struct wiphy;
|
|
*
|
|
* @change_virtual_intf: change type of virtual interface
|
|
*
|
|
+ * @add_key: add a key with the given parameters. @mac_addr will be %NULL
|
|
+ * when adding a group key.
|
|
+ *
|
|
+ * @get_key: get information about the key with the given parameters.
|
|
+ * @mac_addr will be %NULL when requesting information for a group
|
|
+ * key. All pointers given to the @callback function need not be valid
|
|
+ * after it returns.
|
|
+ *
|
|
+ * @del_key: remove a key given the @mac_addr (%NULL for a group key)
|
|
+ * and @key_index
|
|
+ *
|
|
+ * @set_default_key: set the default key on an interface
|
|
*/
|
|
struct cfg80211_ops {
|
|
int (*add_virtual_intf)(struct wiphy *wiphy, char *name,
|
|
@@ -78,6 +110,18 @@ struct cfg80211_ops {
|
|
int (*del_virtual_intf)(struct wiphy *wiphy, int ifindex);
|
|
int (*change_virtual_intf)(struct wiphy *wiphy, int ifindex,
|
|
enum nl80211_iftype type);
|
|
+
|
|
+ int (*add_key)(struct wiphy *wiphy, struct net_device *netdev,
|
|
+ u8 key_index, u8 *mac_addr,
|
|
+ struct key_params *params);
|
|
+ int (*get_key)(struct wiphy *wiphy, struct net_device *netdev,
|
|
+ u8 key_index, u8 *mac_addr, void *cookie,
|
|
+ void (*callback)(void *cookie, struct key_params*));
|
|
+ int (*del_key)(struct wiphy *wiphy, struct net_device *netdev,
|
|
+ u8 key_index, u8 *mac_addr);
|
|
+ int (*set_default_key)(struct wiphy *wiphy,
|
|
+ struct net_device *netdev,
|
|
+ u8 key_index);
|
|
};
|
|
|
|
#endif /* __NET_CFG80211_H */
|