diff options
| author | Ping-Ke Shih <pkshih@realtek.com> | 2022-03-24 03:48:16 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2022-05-04 23:49:38 +0300 |
| commit | fa4d58da401f7fb4e45142d97f1e7e64d224bdfd (patch) | |
| tree | ee18c89c7e96ce33d325a0c277124e2c34ff1ab4 /net/mac80211/wpa.c | |
| parent | 7bc7981eeebe1b8e603ad2ffc5e84f4df76920dd (diff) | |
| download | linux-fa4d58da401f7fb4e45142d97f1e7e64d224bdfd.tar.xz | |
mac80211: consider Order bit to fill CCMP AAD
Follow IEEE 802.11-21 that HTC subfield masked to 0 for all data frames
containing a QoS Control field. It also defines the AAD length depends on
QC and A4 fields, so change logic to determine length accordingly.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://lore.kernel.org/r/20220324004816.6202-1-pkshih@realtek.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/wpa.c')
| -rw-r--r-- | net/mac80211/wpa.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c index 7ed0d268aff2..cd35ae76d5b7 100644 --- a/net/mac80211/wpa.c +++ b/net/mac80211/wpa.c @@ -317,13 +317,12 @@ static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *b_0, u8 *aad) __le16 mask_fc; int a4_included, mgmt; u8 qos_tid; - u16 len_a; - unsigned int hdrlen; + u16 len_a = 22; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; /* * Mask FC: zero subtype b4 b5 b6 (if not mgmt) - * Retry, PwrMgt, MoreData; set Protected + * Retry, PwrMgt, MoreData, Order (if Qos Data); set Protected */ mgmt = ieee80211_is_mgmt(hdr->frame_control); mask_fc = hdr->frame_control; @@ -333,14 +332,17 @@ static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *b_0, u8 *aad) mask_fc &= ~cpu_to_le16(0x0070); mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); - hdrlen = ieee80211_hdrlen(hdr->frame_control); - len_a = hdrlen - 2; a4_included = ieee80211_has_a4(hdr->frame_control); + if (a4_included) + len_a += 6; - if (ieee80211_is_data_qos(hdr->frame_control)) + if (ieee80211_is_data_qos(hdr->frame_control)) { qos_tid = ieee80211_get_tid(hdr); - else + mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_ORDER); + len_a += 2; + } else { qos_tid = 0; + } /* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC * mode authentication are not allowed to collide, yet both are derived |