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authorEliad Peller <eliad@wizery.com>2017-06-09 15:08:42 +0300
committerJohannes Berg <johannes.berg@intel.com>2017-06-13 11:43:56 +0300
commit91b5ab628929d97357108594610e7c07be93e2fd (patch)
tree9a29ed4032549e3d0893d6f7cb0ccfc2e518dd40 /net/wireless
parent699cb58c8a52ff39bf659bff7971893ebe111bf2 (diff)
downloadlinux-91b5ab628929d97357108594610e7c07be93e2fd.tar.xz
cfg80211: support 4-way handshake offloading for WPA/WPA2-PSK
Let drivers advertise support for station-mode 4-way handshake offloading with a new NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_PSK flag. Extend use of NL80211_ATTR_PMK attribute indicating it might be passed as part of NL80211_CMD_CONNECT command, and contain the PSK (which is the PMK, hence the name.) The driver/device is assumed to handle the 4-way handshake by itself in this case (including key derivations, etc.), instead of relying on the supplicant. This patch is somewhat based on this one (by Vladimir Kondratiev): https://patchwork.kernel.org/patch/1309561/. Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com> Signed-off-by: Eliad Peller <eliadx.peller@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> [arend.vanspriel@broadcom.com rebase dealing with existing ATTR_PMK] Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com> [reword NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_PSK docs to indicate that this offload might be required] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/nl80211.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 9eb59196a378..2c6863aee4e4 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -8168,6 +8168,15 @@ static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
memcpy(settings->akm_suites, data, len);
}
+ if (info->attrs[NL80211_ATTR_PMK]) {
+ if (nla_len(info->attrs[NL80211_ATTR_PMK]) != WLAN_PMK_LEN)
+ return -EINVAL;
+ if (!wiphy_ext_feature_isset(&rdev->wiphy,
+ NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_PSK))
+ return -EINVAL;
+ settings->psk = nla_data(info->attrs[NL80211_ATTR_PMK]);
+ }
+
return 0;
}