Thread (6 messages) 6 messages, 3 authors, 2023-02-27

Re: [PATCH] brcmfmac: cfg80211: Use WSEC to set SAE password

From: Arend van Spriel <arend.vanspriel@broadcom.com>
Date: 2023-02-14 10:08:29
Also in: asahi, linux-wireless, lkml

+ Double Lo

On 2/14/2023 10:33 AM, Hector Martin wrote:
Using the WSEC command instead of sae_password seems to be the supported
mechanism on newer firmware, and also how the brcmdhd driver does it.
The SAE code in brcmfmac was added by Cypress/Infineon. For my BCA 
devices that did not work, but this change should be verified on Cypress 
hardware.

Regards,
Arend
quoted hunk ↗ jump to hunk
Signed-off-by: Hector Martin <redacted>
---
Note: must be applied after:

[PATCH 06/10] brcmfmac: cfg80211: Pass the PMK in binary instead of hex

Since that is reviewed and this isn't yet, I expect that will go in
first anyway.

  .../broadcom/brcm80211/brcmfmac/cfg80211.c    | 46 ++++++++-----------
  .../broadcom/brcm80211/brcmfmac/fwil_types.h  |  2 +-
  2 files changed, 20 insertions(+), 28 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index 18e6699d4024..e4690d56e7c3 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -1682,52 +1682,44 @@ static u16 brcmf_map_fw_linkdown_reason(const struct brcmf_event_msg *e)
  	return reason;
  }
  
-static int brcmf_set_pmk(struct brcmf_if *ifp, const u8 *pmk_data, u16 pmk_len)
+static int brcmf_set_wsec(struct brcmf_if *ifp, const u8 *key, u16 key_len, u16 flags)
  {
  	struct brcmf_pub *drvr = ifp->drvr;
  	struct brcmf_wsec_pmk_le pmk;
  	int err;
  
+	if (key_len > sizeof(pmk.key)) {
+		bphy_err(drvr, "key must be less than %zu bytes\n",
+			 sizeof(pmk.key));
+		return -EINVAL;
+	}
+
  	memset(&pmk, 0, sizeof(pmk));
  
-	/* pass pmk directly */
-	pmk.key_len = cpu_to_le16(pmk_len);
-	pmk.flags = cpu_to_le16(0);
-	memcpy(pmk.key, pmk_data, pmk_len);
+	/* pass key material directly */
+	pmk.key_len = cpu_to_le16(key_len);
+	pmk.flags = cpu_to_le16(flags);
+	memcpy(pmk.key, key, key_len);
  
-	/* store psk in firmware */
+	/* store key material in firmware */
  	err = brcmf_fil_cmd_data_set(ifp, BRCMF_C_SET_WSEC_PMK,
  				     &pmk, sizeof(pmk));
  	if (err < 0)
  		bphy_err(drvr, "failed to change PSK in firmware (len=%u)\n",
-			 pmk_len);
+			 key_len);
  
  	return err;
  }
  
+static int brcmf_set_pmk(struct brcmf_if *ifp, const u8 *pmk_data, u16 pmk_len)
+{
+	return brcmf_set_wsec(ifp, pmk_data, pmk_len, 0);
+}
+
  static int brcmf_set_sae_password(struct brcmf_if *ifp, const u8 *pwd_data,
  				  u16 pwd_len)
  {
-	struct brcmf_pub *drvr = ifp->drvr;
-	struct brcmf_wsec_sae_pwd_le sae_pwd;
-	int err;
-
-	if (pwd_len > BRCMF_WSEC_MAX_SAE_PASSWORD_LEN) {
-		bphy_err(drvr, "sae_password must be less than %d\n",
-			 BRCMF_WSEC_MAX_SAE_PASSWORD_LEN);
-		return -EINVAL;
-	}
-
-	sae_pwd.key_len = cpu_to_le16(pwd_len);
-	memcpy(sae_pwd.key, pwd_data, pwd_len);
-
-	err = brcmf_fil_iovar_data_set(ifp, "sae_password", &sae_pwd,
-				       sizeof(sae_pwd));
-	if (err < 0)
-		bphy_err(drvr, "failed to set SAE password in firmware (len=%u)\n",
-			 pwd_len);
-
-	return err;
+	return brcmf_set_wsec(ifp, pwd_data, pwd_len, BRCMF_WSEC_PASSPHRASE);
  }
  
  static void brcmf_link_down(struct brcmf_cfg80211_vif *vif, u16 reason,
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h
index 792adaf880b4..3ba90878c47d 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h
@@ -574,7 +574,7 @@ struct brcmf_wsec_key_le {
  struct brcmf_wsec_pmk_le {
  	__le16  key_len;
  	__le16  flags;
-	u8 key[2 * BRCMF_WSEC_MAX_PSK_LEN + 1];
+	u8 key[BRCMF_WSEC_MAX_SAE_PASSWORD_LEN];
  };
  
  /**

Attachments

  • smime.p7s [application/pkcs7-signature] 4219 bytes
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help