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net80211: allow to override SWCRYPT/SWMIC bits in the driver

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Add IEEE80211_KEY_SWCRYPT / IEEE80211_KEY_SWMIC bits to the
IEEE80211_KEY_DEVICE mask - as a result, those bits will be preserved
during group key handshake.

A driver can override them in iv_key_alloc() for some keys in case
when hardware crypto support is not possible. As an example:
 - multi-vap without multicast key search support;
 - IBSS RSN for devices w/ fixed storage for group keys;

Tested with RTL8188EU (AP, sw crypto) and
RTL8821AU (STA, sw crypto for group keys + hw crypto for pairwise keys)

Reviewed by:	adrian
Differential Revision:	https://reviews.freebsd.org/D7901
This commit is contained in:
Andriy Voskoboinyk 2016-09-15 22:27:00 +00:00
parent 9680db5e94
commit 5d7c8f2065
1 changed files with 4 additions and 2 deletions
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6
sys/net80211/ieee80211_crypto.h
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@ -101,13 +101,15 @@ struct ieee80211_key {
#define IEEE80211_KEY_COMMON /* common flags passed in by apps */\
(IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV | IEEE80211_KEY_GROUP | \
IEEE80211_KEY_NOREPLAY)
#define IEEE80211_KEY_DEVICE /* flags owned by device driver */\
(IEEE80211_KEY_DEVKEY|IEEE80211_KEY_CIPHER0|IEEE80211_KEY_CIPHER1)
#define IEEE80211_KEY_SWCRYPT \
(IEEE80211_KEY_SWENCRYPT | IEEE80211_KEY_SWDECRYPT)
#define IEEE80211_KEY_SWMIC (IEEE80211_KEY_SWENMIC | IEEE80211_KEY_SWDEMIC)
#define IEEE80211_KEY_DEVICE /* flags owned by device driver */\
(IEEE80211_KEY_DEVKEY|IEEE80211_KEY_CIPHER0|IEEE80211_KEY_CIPHER1| \
IEEE80211_KEY_SWCRYPT|IEEE80211_KEY_SWMIC)
#define IEEE80211_KEY_BITS \
"\20\1XMIT\2RECV\3GROUP\4SWENCRYPT\5SWDECRYPT\6SWENMIC\7SWDEMIC" \
"\10DEVKEY\11CIPHER0\12CIPHER1"