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Commit a31cf1c6 authored by Johannes Berg's avatar Johannes Berg
Browse files

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: default avatarJohannes Berg <johannes.berg@intel.com>
parent 9352c19f

include/net/mac80211.h

+7 −0
Original line number Original line Diff line number Diff line
@@ -1501,6 +1501,8 @@ struct ieee80211_key_conf { 
	u8 key[0];

	u8 key[0];

};

};





#define IEEE80211_MAX_PN_LEN	16



/**

/**

 * struct ieee80211_key_seq - key sequence counter

 * struct ieee80211_key_seq - key sequence counter

 *

 *
@@ -1513,6 +1515,7 @@ struct ieee80211_key_conf { 
 *	reverse order than in packet)

 *	reverse order than in packet)

 * @gcmp: PN data, most significant byte first (big endian,

 * @gcmp: PN data, most significant byte first (big endian,

 *	reverse order than in packet)

 *	reverse order than in packet)

 * @hw: data for HW-only (e.g. cipher scheme) keys

 */

 */

struct ieee80211_key_seq {

struct ieee80211_key_seq {

	union {

	union {
@@ -1532,6 +1535,10 @@ struct ieee80211_key_seq { 
		struct {

		struct {

			u8 pn[6];

			u8 pn[6];

		} gcmp;

		} gcmp;

		struct {

			u8 seq[IEEE80211_MAX_PN_LEN];

			u8 seq_len;

		} hw;

	};

	};

};

};

net/mac80211/cfg.c

+9 −0
Original line number Original line Diff line number Diff line
@@ -431,6 +431,15 @@ static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev, 
		params.seq = seq;

		params.seq = seq;

		params.seq_len = 6;

		params.seq_len = 6;

		break;

		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;

	params.key = key->conf.key;

net/mac80211/key.c

+2 −2
Original line number Original line Diff line number Diff line
@@ -485,8 +485,8 @@ ieee80211_key_alloc(u32 cipher, int idx, size_t key_len, 
		break;

		break;

	default:

	default:

		if (cs) {

		if (cs) {

			size_t len = (seq_len > MAX_PN_LEN) ?

			size_t len = (seq_len > IEEE80211_MAX_PN_LEN) ?

						MAX_PN_LEN : seq_len;

						IEEE80211_MAX_PN_LEN : seq_len;





			key->conf.iv_len = cs->hdr_len;

			key->conf.iv_len = cs->hdr_len;

			key->conf.icv_len = cs->mic_len;

			key->conf.icv_len = cs->mic_len;

net/mac80211/key.h

+1 −2
Original line number Original line Diff line number Diff line
@@ -18,7 +18,6 @@ 




#define NUM_DEFAULT_KEYS 4

#define NUM_DEFAULT_KEYS 4

#define NUM_DEFAULT_MGMT_KEYS 2

#define NUM_DEFAULT_MGMT_KEYS 2

#define MAX_PN_LEN 16





struct ieee80211_local;

struct ieee80211_local;

struct ieee80211_sub_if_data;

struct ieee80211_sub_if_data;
@@ -116,7 +115,7 @@ struct ieee80211_key { 
		} gcmp;

		} gcmp;

		struct {

		struct {

			/* generic cipher scheme */

			/* 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;

		} gen;

	} u;

	} u;