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mac80211: extend get_key() to return PN for all ciphers 

For ciphers not supported by mac80211, the function currently
doesn't return any PN data. Fix this by extending the driver's
get_key_seq() a little more to allow moving arbitrary PN data.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2015-04-20 18:21:58 +02:00
parent 9352c19f63
commit a31cf1c69e
4 changed files with 19 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
include/net/mac80211.h
View File

@ -1501,6 +1501,8 @@ struct ieee80211_key_conf {
u8 key[0];
};
#define IEEE80211_MAX_PN_LEN 16
/**
* struct ieee80211_key_seq - key sequence counter
*
@ -1513,6 +1515,7 @@ struct ieee80211_key_conf {
* reverse order than in packet)
* @gcmp: PN data, most significant byte first (big endian,
* reverse order than in packet)
* @hw: data for HW-only (e.g. cipher scheme) keys
*/
struct ieee80211_key_seq {
union {
@ -1532,6 +1535,10 @@ struct ieee80211_key_seq {
struct {
u8 pn[6];
} gcmp;
struct {
u8 seq[IEEE80211_MAX_PN_LEN];
u8 seq_len;
} hw;
};
};

9
net/mac80211/cfg.c
View File

@ -431,6 +431,15 @@ static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
params.seq = seq;
params.seq_len = 6;
break;
default:
if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
break;
if (WARN_ON(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
break;
drv_get_key_seq(sdata->local, key, &kseq);
params.seq = kseq.hw.seq;
params.seq_len = kseq.hw.seq_len;
break;
}
params.key = key->conf.key;

4
net/mac80211/key.c
View File

@ -485,8 +485,8 @@ ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
break;
default:
if (cs) {
size_t len = (seq_len > MAX_PN_LEN) ?
MAX_PN_LEN : seq_len;
size_t len = (seq_len > IEEE80211_MAX_PN_LEN) ?
IEEE80211_MAX_PN_LEN : seq_len;
key->conf.iv_len = cs->hdr_len;
key->conf.icv_len = cs->mic_len;

3
net/mac80211/key.h
View File

@ -18,7 +18,6 @@
#define NUM_DEFAULT_KEYS 4
#define NUM_DEFAULT_MGMT_KEYS 2
#define MAX_PN_LEN 16
struct ieee80211_local;
struct ieee80211_sub_if_data;
@ -116,7 +115,7 @@ struct ieee80211_key {
} gcmp;
struct {
/* generic cipher scheme */
u8 rx_pn[IEEE80211_NUM_TIDS + 1][MAX_PN_LEN];
u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_MAX_PN_LEN];
} gen;
} u;