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| author | Miri Korenblit <miriam.rachel.korenblit@intel.com> | 2025-07-21 21:50:49 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2025-07-22 10:43:19 +0200 |
| commit | 69fdb084355d6c0b353536024cc51aa5f7ffb62c (patch) | |
| tree | abbdc17a8eb4a6d837ad76695c6ccfcc254d56f4 /net/mac80211 | |
| parent | 2ed9a9fc9976262109d04f1a3c75c46de8ce4f22 (diff) | |
| download | linux-69fdb084355d6c0b353536024cc51aa5f7ffb62c.tar.gz linux-69fdb084355d6c0b353536024cc51aa5f7ffb62c.tar.bz2 linux-69fdb084355d6c0b353536024cc51aa5f7ffb62c.zip | |
wifi: mac80211: don't require cipher and keylen in gtk rekey
ieee80211_add_gtk_rekey receives a keyconf as an argument, and the
cipher and keylen are taken from there to the new allocated key.
But in rekey, both the cipher and the keylen should be the same as of
the old key, so let ieee80211_add_gtk_rekey find those, so drivers won't
have to fill it in.
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250721214922.3c5c023bfae9.Ie6594ae2b4b6d5b3d536e642b349046ebfce7a5d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/key.c | 36 |
1 files changed, 33 insertions, 3 deletions
diff --git a/net/mac80211/key.c b/net/mac80211/key.c index 9d65013ddac7..b14e9cd9713f 100644 --- a/net/mac80211/key.c +++ b/net/mac80211/key.c @@ -1356,11 +1356,12 @@ EXPORT_SYMBOL_GPL(ieee80211_set_key_rx_seq); struct ieee80211_key_conf * ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, - struct ieee80211_key_conf *keyconf, + u8 idx, u8 *key_data, u8 key_len, int link_id) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); struct ieee80211_local *local = sdata->local; + struct ieee80211_key *prev_key; struct ieee80211_key *key; int err; struct ieee80211_link_data *link_data = @@ -1376,8 +1377,37 @@ ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) return ERR_PTR(-EINVAL); - key = ieee80211_key_alloc(keyconf->cipher, keyconf->keyidx, - keyconf->keylen, keyconf->key, + if (WARN_ON(idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS + + NUM_DEFAULT_BEACON_KEYS)) + return ERR_PTR(-EINVAL); + + prev_key = wiphy_dereference(local->hw.wiphy, + link_data->gtk[idx]); + if (!prev_key) { + if (idx < NUM_DEFAULT_KEYS) { + for (int i = 0; i < NUM_DEFAULT_KEYS; i++) { + if (i == idx) + continue; + prev_key = wiphy_dereference(local->hw.wiphy, + link_data->gtk[i]); + if (prev_key) + break; + } + } else { + /* For IGTK we have 4 and 5 and for BIGTK - 6 and 7 */ + prev_key = wiphy_dereference(local->hw.wiphy, + link_data->gtk[idx ^ 1]); + } + } + + if (WARN_ON(!prev_key)) + return ERR_PTR(-EINVAL); + + if (WARN_ON(key_len < prev_key->conf.keylen)) + return ERR_PTR(-EINVAL); + + key = ieee80211_key_alloc(prev_key->conf.cipher, idx, + prev_key->conf.keylen, key_data, 0, NULL); if (IS_ERR(key)) return ERR_CAST(key); |