From: Chung-Hsien Hsu <stanley.hsu@xxxxxxxxxxx>
Let drivers advertise support for station-mode SAE authentication
offload with a new NL80211_EXT_FEATURE_SAE_OFFLOAD flag.
Signed-off-by: Chung-Hsien Hsu <stanley.hsu@xxxxxxxxxxx>
Signed-off-by: Chi-Hsien Lin <chi-hsien.lin@xxxxxxxxxxx>
---
include/linux/ieee80211.h | 1 +
include/net/cfg80211.h | 5 +++++
include/uapi/linux/nl80211.h | 16 ++++++++++++++++
net/wireless/nl80211.c | 14 ++++++++++++++
4 files changed, 36 insertions(+)
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 3b04e72315e1..37d3e655e547 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -2596,6 +2596,7 @@ enum ieee80211_key_len {
#define FILS_ERP_MAX_RRK_LEN 64
#define PMK_MAX_LEN 64
+#define SAE_PASSWORD_MAX_LEN 128
/* Public action codes (IEEE Std 802.11-2016, 9.6.8.1, Table 9-307) */
enum ieee80211_pub_actioncode {
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index e0c41eb1c860..5809dac97b33 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -740,6 +740,9 @@ struct survey_info {
* CFG80211_MAX_WEP_KEYS WEP keys
* @wep_tx_key: key index (0..3) of the default TX static WEP key
* @psk: PSK (for devices supporting 4-way-handshake offload)
+ * @sae_pwd: password for SAE authentication (for devices supporting SAE
+ * offload)
+ * @sae_pwd_len: length of SAE password (for devices supporting SAE offload)
*/
struct cfg80211_crypto_settings {
u32 wpa_versions;
@@ -755,6 +758,8 @@ struct cfg80211_crypto_settings {
struct key_params *wep_keys;
int wep_tx_key;
const u8 *psk;
+ const u8 *sae_pwd;
+ u16 sae_pwd_len;
};
/**
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 12762afb3a07..4840aaed39ba 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -235,6 +235,15 @@
*/
/**
+ * DOC: SAE authentication offload
+ *
+ * By setting @NL80211_EXT_FEATURE_SAE_OFFLOAD flag drivers can indicate they
+ * support offloading SAE authentication for WPA3-Personal networks. In
+ * %NL80211_CMD_CONNECT the password for SAE should be specified using
+ * %NL80211_ATTR_SAE_PASSWORD.
+ */
+
+/**
* enum nl80211_commands - supported nl80211 commands
*
* @NL80211_CMD_UNSPEC: unspecified command to catch errors
@@ -2288,6 +2297,9 @@ enum nl80211_commands {
*
* @NL80211_ATTR_FTM_RESPONDER_STATS: Nested attribute with FTM responder
* statistics, see &enum nl80211_ftm_responder_stats.
+ * @NL80211_ATTR_SAE_PASSWORD: attribute for passing SAE password material. It
+ * is used with %NL80211_CMD_CONNECT to provide password for offloading
+ * SAE authentication for WPA3-Personal networks.
*
* @NL80211_ATTR_TIMEOUT: Timeout for the given operation in milliseconds (u32),
* if the attribute is not given no timeout is requested. Note that 0 is an
@@ -2743,6 +2755,7 @@ enum nl80211_attrs {
NL80211_ATTR_FTM_RESPONDER,
NL80211_ATTR_FTM_RESPONDER_STATS,
+ NL80211_ATTR_SAE_PASSWORD,
NL80211_ATTR_TIMEOUT,
@@ -5316,6 +5329,8 @@ enum nl80211_feature_flags {
* able to rekey an in-use key correctly. Userspace must not rekey PTK keys
* if this flag is not set. Ignoring this can leak clear text packets and/or
* freeze the connection.
+ * @NL80211_EXT_FEATURE_SAE_OFFLOAD: Device wants to do SAE authentication in
+ * station mode (SAE password is passed as part of the connect command).
*
* @NUM_NL80211_EXT_FEATURES: number of extended features.
* @MAX_NL80211_EXT_FEATURES: highest extended feature index.
@@ -5356,6 +5371,7 @@ enum nl80211_ext_feature_index {
NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT,
NL80211_EXT_FEATURE_CAN_REPLACE_PTK0,
NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER,
+ NL80211_EXT_FEATURE_SAE_OFFLOAD,
/* add new features before the definition below */
NUM_NL80211_EXT_FEATURES,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c464ce8bc248..d1ebc93d5d56 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -557,6 +557,8 @@ const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_PEER_MEASUREMENTS] =
NLA_POLICY_NESTED(NL80211_PMSR_FTM_REQ_ATTR_MAX,
nl80211_pmsr_attr_policy),
+ [NL80211_ATTR_SAE_PASSWORD] = { .type = NLA_BINARY,
+ .len = SAE_PASSWORD_MAX_LEN },
};
/* policy for the key attributes */
@@ -4348,6 +4350,8 @@ static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
return true;
case NL80211_CMD_CONNECT:
if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
+ !wiphy_ext_feature_isset(&rdev->wiphy,
+ NL80211_EXT_FEATURE_SAE_OFFLOAD) &&
auth_type == NL80211_AUTHTYPE_SAE)
return false;
@@ -8769,6 +8773,16 @@ static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
settings->psk = nla_data(info->attrs[NL80211_ATTR_PMK]);
}
+ if (info->attrs[NL80211_ATTR_SAE_PASSWORD]) {
+ if (!wiphy_ext_feature_isset(&rdev->wiphy,
+ NL80211_EXT_FEATURE_SAE_OFFLOAD))
+ return -EINVAL;
+ settings->sae_pwd =
+ nla_data(info->attrs[NL80211_ATTR_SAE_PASSWORD]);
+ settings->sae_pwd_len =
+ nla_len(info->attrs[NL80211_ATTR_SAE_PASSWORD]);
+ }
+
return 0;
}
--
2.1.0
