| Message ID | 20211226153624.162281-27-marcan@marcan.st (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Kalle Valo |
| Headers | show |
| Series | brcmfmac: Support Apple T2 and M1 platforms | expand |
On Sun, Dec 26, 2021 at 4:40 PM Hector Martin <marcan@marcan.st> wrote: > Apparently the hex passphrase mechanism does not work on newer > chips/firmware (e.g. BCM4387). It seems there was a simple way of > passing it in binary all along, so use that and avoid the hexification. > > OpenBSD has been doing it like this from the beginning, so this should > work on all chips. > > Also clear the structure before setting the PMK. This was leaking > uninitialized stack contents to the device. > > Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Yours, Linus Walleij
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c index fd2b8b822f8c..863349877933 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c @@ -1420,13 +1420,14 @@ static int brcmf_set_pmk(struct brcmf_if *ifp, const u8 *pmk_data, u16 pmk_len) { struct brcmf_pub *drvr = ifp->drvr; struct brcmf_wsec_pmk_le pmk; - int i, err; + int err; + + memset(&pmk, 0, sizeof(pmk)); - /* convert to firmware key format */ - pmk.key_len = cpu_to_le16(pmk_len << 1); - pmk.flags = cpu_to_le16(BRCMF_WSEC_PASSPHRASE); - for (i = 0; i < pmk_len; i++) - snprintf(&pmk.key[2 * i], 3, "%02x", pmk_data[i]); + /* pass pmk directly */ + pmk.key_len = cpu_to_le16(pmk_len); + pmk.flags = cpu_to_le16(0); + memcpy(pmk.key, pmk_data, pmk_len); /* store psk in firmware */ err = brcmf_fil_cmd_data_set(ifp, BRCMF_C_SET_WSEC_PMK,
Apparently the hex passphrase mechanism does not work on newer chips/firmware (e.g. BCM4387). It seems there was a simple way of passing it in binary all along, so use that and avoid the hexification. OpenBSD has been doing it like this from the beginning, so this should work on all chips. Also clear the structure before setting the PMK. This was leaking uninitialized stack contents to the device. Signed-off-by: Hector Martin <marcan@marcan.st> --- .../wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-)