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cfg80211: support 4-way handshake offloading for 802.1X

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Add API for setting the PMK to the driver. For FT support, allow
setting also the PMK-R0 Name.

This can be used by drivers that support 4-Way handshake offload
while IEEE802.1X authentication is managed by upper layers.

Signed-off-by: Avraham Stern <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
[[email protected]: add WANT_1X_4WAY_HS attribute]
Signed-off-by: Arend van Spriel <[email protected]>
[reword NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X docs a bit to
say that the device may require it]
Signed-off-by: Johannes Berg <[email protected]>
This commit is contained in:
Avraham Stern 2017-06-09 13:08:43 +01:00 • committed by Johannes Berg
commit 3a00df5707
7 changed files with 268 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

5
net/wireless/core.c
View file

@ -711,6 +711,11 @@ int wiphy_register(struct wiphy *wiphy)
(wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
return -EINVAL;
if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
(!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
return -EINVAL;
if (wiphy->addresses)
memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);

105
net/wireless/nl80211.c
View file

@ -8881,6 +8881,12 @@ static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
if (info->attrs[NL80211_ATTR_WANT_1X_4WAY_HS] &&
!wiphy_ext_feature_isset(&rdev->wiphy,
NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X))
return -EINVAL;
connect.want_1x = info->attrs[NL80211_ATTR_WANT_1X_4WAY_HS];
err = nl80211_crypto_settings(rdev, info, &connect.crypto,
NL80211_MAX_NR_CIPHER_SUITES);
if (err)
@ -12265,6 +12271,90 @@ static int nl80211_set_multicast_to_unicast(struct sk_buff *skb,
return rdev_set_multicast_to_unicast(rdev, dev, enabled);
}
static int nl80211_set_pmk(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_pmk_conf pmk_conf = {};
int ret;
if (wdev->iftype != NL80211_IFTYPE_STATION &&
wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
return -EOPNOTSUPP;
if (!wiphy_ext_feature_isset(&rdev->wiphy,
NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X))
return -EOPNOTSUPP;
if (!info->attrs[NL80211_ATTR_MAC] || !info->attrs[NL80211_ATTR_PMK])
return -EINVAL;
wdev_lock(wdev);
if (!wdev->current_bss) {
ret = -ENOTCONN;
goto out;
}
pmk_conf.aa = nla_data(info->attrs[NL80211_ATTR_MAC]);
if (memcmp(pmk_conf.aa, wdev->current_bss->pub.bssid, ETH_ALEN)) {
ret = -EINVAL;
goto out;
}
pmk_conf.pmk = nla_data(info->attrs[NL80211_ATTR_PMK]);
pmk_conf.pmk_len = nla_len(info->attrs[NL80211_ATTR_PMK]);
if (pmk_conf.pmk_len != WLAN_PMK_LEN &&
pmk_conf.pmk_len != WLAN_PMK_LEN_SUITE_B_192) {
ret = -EINVAL;
goto out;
}
if (info->attrs[NL80211_ATTR_PMKR0_NAME]) {
int r0_name_len = nla_len(info->attrs[NL80211_ATTR_PMKR0_NAME]);
if (r0_name_len != WLAN_PMK_NAME_LEN) {
ret = -EINVAL;
goto out;
}
pmk_conf.pmk_r0_name =
nla_data(info->attrs[NL80211_ATTR_PMKR0_NAME]);
}
ret = rdev_set_pmk(rdev, dev, &pmk_conf);
out:
wdev_unlock(wdev);
return ret;
}
static int nl80211_del_pmk(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wireless_dev *wdev = dev->ieee80211_ptr;
const u8 *aa;
int ret;
if (wdev->iftype != NL80211_IFTYPE_STATION &&
wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
return -EOPNOTSUPP;
if (!wiphy_ext_feature_isset(&rdev->wiphy,
NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X))
return -EOPNOTSUPP;
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
wdev_lock(wdev);
aa = nla_data(info->attrs[NL80211_ATTR_MAC]);
ret = rdev_del_pmk(rdev, dev, aa);
wdev_unlock(wdev);
return ret;
}
#define NL80211_FLAG_NEED_WIPHY 0x01
#define NL80211_FLAG_NEED_NETDEV 0x02
#define NL80211_FLAG_NEED_RTNL 0x04
@ -13140,6 +13230,21 @@ static const struct genl_ops nl80211_ops[] = {
.internal_flags = NL80211_FLAG_NEED_NETDEV |
NL80211_FLAG_NEED_RTNL,
},
{
.cmd = NL80211_CMD_SET_PMK,
.doit = nl80211_set_pmk,
.policy = nl80211_policy,
.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
NL80211_FLAG_NEED_RTNL,
},
{
.cmd = NL80211_CMD_DEL_PMK,
.doit = nl80211_del_pmk,
.policy = nl80211_policy,
.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
NL80211_FLAG_NEED_RTNL,
},
};
static struct genl_family nl80211_fam __ro_after_init = {

25
net/wireless/rdev-ops.h
View file

@ -1164,4 +1164,29 @@ rdev_set_coalesce(struct cfg80211_registered_device *rdev,
trace_rdev_return_int(&rdev->wiphy, ret);
return ret;
}
static inline int rdev_set_pmk(struct cfg80211_registered_device *rdev,
struct net_device *dev,
struct cfg80211_pmk_conf *pmk_conf)
{
int ret = -EOPNOTSUPP;
trace_rdev_set_pmk(&rdev->wiphy, dev, pmk_conf);
if (rdev->ops->set_pmk)
ret = rdev->ops->set_pmk(&rdev->wiphy, dev, pmk_conf);
trace_rdev_return_int(&rdev->wiphy, ret);
return ret;
}
static inline int rdev_del_pmk(struct cfg80211_registered_device *rdev,
struct net_device *dev, const u8 *aa)
{
int ret = -EOPNOTSUPP;
trace_rdev_del_pmk(&rdev->wiphy, dev, aa);
if (rdev->ops->del_pmk)
ret = rdev->ops->del_pmk(&rdev->wiphy, dev, aa);
trace_rdev_return_int(&rdev->wiphy, ret);
return ret;
}
#endif /* __CFG80211_RDEV_OPS */

60
net/wireless/trace.h
View file

@ -2258,6 +2258,66 @@ TRACE_EVENT(rdev_tdls_cancel_channel_switch,
WIPHY_PR_ARG, NETDEV_PR_ARG, MAC_PR_ARG(addr))
);
TRACE_EVENT(rdev_set_pmk,
TP_PROTO(struct wiphy *wiphy, struct net_device *netdev,
struct cfg80211_pmk_conf *pmk_conf),
TP_ARGS(wiphy, netdev, pmk_conf),
TP_STRUCT__entry(
WIPHY_ENTRY
NETDEV_ENTRY
MAC_ENTRY(aa)
__field(u8, pmk_len)
__field(u8, pmk_r0_name_len)
__dynamic_array(u8, pmk, pmk_conf->pmk_len)
__dynamic_array(u8, pmk_r0_name, WLAN_PMK_NAME_LEN)
),
TP_fast_assign(
WIPHY_ASSIGN;
NETDEV_ASSIGN;
MAC_ASSIGN(aa, pmk_conf->aa);
__entry->pmk_len = pmk_conf->pmk_len;
__entry->pmk_r0_name_len =
pmk_conf->pmk_r0_name ? WLAN_PMK_NAME_LEN : 0;
memcpy(__get_dynamic_array(pmk), pmk_conf->pmk,
pmk_conf->pmk_len);
memcpy(__get_dynamic_array(pmk_r0_name), pmk_conf->pmk_r0_name,
pmk_conf->pmk_r0_name ? WLAN_PMK_NAME_LEN : 0);
),
TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", " MAC_PR_FMT
"pmk_len=%u, pmk: %s pmk_r0_name: %s", WIPHY_PR_ARG,
NETDEV_PR_ARG, MAC_PR_ARG(aa), __entry->pmk_len,
__print_array(__get_dynamic_array(pmk),
__get_dynamic_array_len(pmk), 1),
__entry->pmk_r0_name_len ?
__print_array(__get_dynamic_array(pmk_r0_name),
__get_dynamic_array_len(pmk_r0_name), 1) : "")
);
TRACE_EVENT(rdev_del_pmk,
TP_PROTO(struct wiphy *wiphy, struct net_device *netdev, const u8 *aa),
TP_ARGS(wiphy, netdev, aa),
TP_STRUCT__entry(
WIPHY_ENTRY
NETDEV_ENTRY
MAC_ENTRY(aa)
),
TP_fast_assign(
WIPHY_ASSIGN;
NETDEV_ASSIGN;
MAC_ASSIGN(aa, aa);
),
TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", " MAC_PR_FMT,
WIPHY_PR_ARG, NETDEV_PR_ARG, MAC_PR_ARG(aa))
);
/*************************************************************
* cfg80211 exported functions traces *
*************************************************************/