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UPSTREAM: wifi: cfg80211: Support 32 bytes KCK key in GTK rekey offload

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Currently, maximum KCK key length supported for GTK rekey offload is 24
bytes but with some newer AKMs the KCK key length can be 32 bytes. e.g.,
00-0F-AC:24 AKM suite with SAE finite cyclic group 21.

Add support to allow 32 bytes KCK keys in GTK rekey offload.

Link: https://lore.kernel.org/r/20221206143715.1802987-3-quic_vjakkam@quicinc.com
Signed-off-by: Shivani Baranwal <quic_shivbara@quicinc.com>
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>


Bug: 267404496
Change-Id: I49cede61dc0ddc7d8d063caf986c81aa89437617
(cherry picked from commit 648fba791cb0f5ef6166449d056f82e6639fe268)
Signed-off-by: Shivani Baranwal <quic_shivbara@quicinc.com>
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
This commit is contained in:
Shivani Baranwal
2022-12-06 20:07:15 +05:30
committed by Treehugger Robot
parent 26bac3f093
commit 3383d21e9e
3 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/cfg80211.h
View File

@@ -4922,6 +4922,7 @@ struct cfg80211_ops {
* in order to not have them reachable in normal drivers, until we have
* complete feature/interface combinations/etc. advertisement. No driver
* should set this flag for now.
* @WIPHY_FLAG_SUPPORTS_EXT_KCK_32: The device supports 32-byte KCK keys.
*/
enum wiphy_flags {
WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK = BIT(0),
@@ -4934,7 +4935,7 @@ enum wiphy_flags {
WIPHY_FLAG_CONTROL_PORT_PROTOCOL = BIT(7),
WIPHY_FLAG_IBSS_RSN = BIT(8),
WIPHY_FLAG_MESH_AUTH = BIT(10),
/* use hole at 11 */
WIPHY_FLAG_SUPPORTS_EXT_KCK_32 = BIT(11),
/* use hole at 12 */
WIPHY_FLAG_SUPPORTS_FW_ROAM = BIT(13),
WIPHY_FLAG_AP_UAPSD = BIT(14),

1
include/uapi/linux/nl80211.h
View File

@@ -5924,6 +5924,7 @@ enum plink_actions {
#define NL80211_KEK_LEN 16
#define NL80211_KCK_EXT_LEN 24
#define NL80211_KEK_EXT_LEN 32
#define NL80211_KCK_EXT_LEN_32 32
#define NL80211_REPLAY_CTR_LEN 8
/**

6
net/wireless/nl80211.c
View File

@@ -883,7 +883,7 @@ nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
},
[NL80211_REKEY_DATA_KCK] = {
.type = NLA_BINARY,
.len = NL80211_KCK_EXT_LEN
.len = NL80211_KCK_EXT_LEN_32
},
[NL80211_REKEY_DATA_REPLAY_CTR] = NLA_POLICY_EXACT_LEN(NL80211_REPLAY_CTR_LEN),
[NL80211_REKEY_DATA_AKM] = { .type = NLA_U32 },
@@ -13809,7 +13809,9 @@ static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
return -ERANGE;
if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN &&
!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK &&
nla_len(tb[NL80211_REKEY_DATA_KCK]) == NL80211_KCK_EXT_LEN))
nla_len(tb[NL80211_REKEY_DATA_KCK]) == NL80211_KCK_EXT_LEN) &&
!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_EXT_KCK_32 &&
nla_len(tb[NL80211_REKEY_DATA_KCK]) == NL80211_KCK_EXT_LEN_32))
return -ERANGE;
rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);