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nl80211: add support for SAE authentication offload

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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@cypress.com>
Signed-off-by: Chi-Hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Chung-Hsien Hsu 2019-05-09 09:49:06 +00:00 committed by Johannes Berg
parent cc3e14c21a
commit 26f7044e95
4 changed files with 39 additions and 0 deletions
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1
include/linux/ieee80211.h
View File

@ -2612,6 +2612,7 @@ 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 {

5
include/net/cfg80211.h
View File

@ -742,6 +742,9 @@ 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;
@ -757,6 +760,8 @@ struct cfg80211_crypto_settings {
struct key_params *wep_keys;
int wep_tx_key;
const u8 *psk;
const u8 *sae_pwd;
u8 sae_pwd_len;
};
/**

19
include/uapi/linux/nl80211.h
View File

@ -234,6 +234,15 @@
* use in a FILS shared key connection with PMKSA caching.
*/
/**
* 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
*
@ -2341,6 +2350,10 @@ enum nl80211_commands {
* should be picking up the lowest tx power, either tx power per-interface
* or per-station.
*
* @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.
*
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@ -2794,6 +2807,8 @@ enum nl80211_attrs {
NL80211_ATTR_STA_TX_POWER_SETTING,
NL80211_ATTR_STA_TX_POWER,
NL80211_ATTR_SAE_PASSWORD,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@ -5423,6 +5438,9 @@ enum nl80211_feature_flags {
* @NL80211_EXT_FEATURE_STA_TX_PWR: This driver supports controlling tx power
* to a station.
*
* @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.
*/
@ -5467,6 +5485,7 @@ enum nl80211_ext_feature_index {
NL80211_EXT_FEATURE_SCHED_SCAN_BAND_SPECIFIC_RSSI_THOLD,
NL80211_EXT_FEATURE_EXT_KEY_ID,
NL80211_EXT_FEATURE_STA_TX_PWR,
NL80211_EXT_FEATURE_SAE_OFFLOAD,
/* add new features before the definition below */
NUM_NL80211_EXT_FEATURES,

14
net/wireless/nl80211.c
View File

@ -571,6 +571,8 @@ const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_PEER_MEASUREMENTS] =
NLA_POLICY_NESTED(nl80211_pmsr_attr_policy),
[NL80211_ATTR_AIRTIME_WEIGHT] = NLA_POLICY_MIN(NLA_U16, 1),
[NL80211_ATTR_SAE_PASSWORD] = { .type = NLA_BINARY,
.len = SAE_PASSWORD_MAX_LEN },
};
/* policy for the key attributes */
@ -4434,6 +4436,8 @@ 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;
@ -8973,6 +8977,16 @@ 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;
}