From d5f59c964e15e9e2cffaf8b0e9034616568717f9 Mon Sep 17 00:00:00 2001 From: Chung-Hsien Hsu Date: Mon, 17 Aug 2020 02:33:16 -0500 Subject: [PATCH] brcmfmac: support SAE authentication offload in AP mode Firmware may have SAE authenticator code built-in. This is detected by the driver and indicated in the wiphy features flags. User space can use this flag to determine whether or not to provide the password material in the nl80211 start AP command to offload the SAE authentication in AP mode. Signed-off-by: Chung-Hsien Hsu Signed-off-by: Chi-Hsien Lin Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200817073316.33402-5-stanley.hsu@cypress.com --- .../broadcom/brcm80211/brcmfmac/cfg80211.c | 28 ++++++++++++++++--- .../broadcom/brcm80211/brcmfmac/cfg80211.h | 4 ++- 2 files changed, 27 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c index 4b06e4dbe867..a2dbbb977d0c 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c @@ -56,6 +56,7 @@ #define RSN_AKM_PSK 2 /* Pre-shared Key */ #define RSN_AKM_SHA256_1X 5 /* SHA256, 802.1X */ #define RSN_AKM_SHA256_PSK 6 /* SHA256, Pre-shared Key */ +#define RSN_AKM_SAE 8 /* SAE */ #define RSN_CAP_LEN 2 /* Length of RSN capabilities */ #define RSN_CAP_PTK_REPLAY_CNTR_MASK (BIT(2) | BIT(3)) #define RSN_CAP_MFPR_MASK BIT(6) @@ -4242,6 +4243,10 @@ brcmf_configure_wpaie(struct brcmf_if *ifp, brcmf_dbg(TRACE, "RSN_AKM_MFP_1X\n"); wpa_auth |= WPA2_AUTH_1X_SHA256; break; + case RSN_AKM_SAE: + brcmf_dbg(TRACE, "RSN_AKM_SAE\n"); + wpa_auth |= WPA3_AUTH_SAE_PSK; + break; default: bphy_err(drvr, "Invalid key mgmt info\n"); } @@ -4259,11 +4264,12 @@ brcmf_configure_wpaie(struct brcmf_if *ifp, brcmf_dbg(TRACE, "MFP Required\n"); mfp = BRCMF_MFP_REQUIRED; /* Firmware only supports mfp required in - * combination with WPA2_AUTH_PSK_SHA256 or - * WPA2_AUTH_1X_SHA256. + * combination with WPA2_AUTH_PSK_SHA256, + * WPA2_AUTH_1X_SHA256, or WPA3_AUTH_SAE_PSK. */ if (!(wpa_auth & (WPA2_AUTH_PSK_SHA256 | - WPA2_AUTH_1X_SHA256))) { + WPA2_AUTH_1X_SHA256 | + WPA3_AUTH_SAE_PSK))) { err = -EINVAL; goto exit; } @@ -4828,6 +4834,14 @@ brcmf_cfg80211_start_ap(struct wiphy *wiphy, struct net_device *ndev, if (err < 0) goto exit; } + if (crypto->sae_pwd) { + brcmf_dbg(INFO, "using SAE offload\n"); + profile->use_fwauth |= BIT(BRCMF_PROFILE_FWAUTH_SAE); + err = brcmf_set_sae_password(ifp, crypto->sae_pwd, + crypto->sae_pwd_len); + if (err < 0) + goto exit; + } if (profile->use_fwauth == 0) profile->use_fwauth = BIT(BRCMF_PROFILE_FWAUTH_NONE); @@ -4932,6 +4946,8 @@ static int brcmf_cfg80211_stop_ap(struct wiphy *wiphy, struct net_device *ndev) if (profile->use_fwauth != BIT(BRCMF_PROFILE_FWAUTH_NONE)) { if (profile->use_fwauth & BIT(BRCMF_PROFILE_FWAUTH_PSK)) brcmf_set_pmk(ifp, NULL, 0); + if (profile->use_fwauth & BIT(BRCMF_PROFILE_FWAUTH_SAE)) + brcmf_set_sae_password(ifp, NULL, 0); profile->use_fwauth = BIT(BRCMF_PROFILE_FWAUTH_NONE); } @@ -7083,9 +7099,13 @@ static int brcmf_setup_wiphy(struct wiphy *wiphy, struct brcmf_if *ifp) wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_SAE_OFFLOAD); } - if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_FWAUTH)) + if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_FWAUTH)) { wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_4WAY_HANDSHAKE_AP_PSK); + if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_SAE)) + wiphy_ext_feature_set(wiphy, + NL80211_EXT_FEATURE_SAE_OFFLOAD_AP); + } wiphy->mgmt_stypes = brcmf_txrx_stypes; wiphy->max_remain_on_channel_duration = 5000; if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_PNO)) { diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h index bf86e0ca941e..17817cdb5de2 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h @@ -133,10 +133,12 @@ enum brcmf_profile_fwsup { * * @BRCMF_PROFILE_FWAUTH_NONE: no firmware authenticator * @BRCMF_PROFILE_FWAUTH_PSK: authenticator for WPA/WPA2-PSK + * @BRCMF_PROFILE_FWAUTH_SAE: authenticator for SAE */ enum brcmf_profile_fwauth { BRCMF_PROFILE_FWAUTH_NONE, - BRCMF_PROFILE_FWAUTH_PSK + BRCMF_PROFILE_FWAUTH_PSK, + BRCMF_PROFILE_FWAUTH_SAE }; /**