[PATCH 5/5] cfg80211: check if WEP is available for shared key auth

[Johannes Berg <johannes@sipsolutions.net>]

From: Johannes Berg <johannes.berg@intel.com>

When shared key auth is requested, cfg80211
should verify that the device is capable of
WEP crypto which is required.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/wireless/nl80211.c |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

--- wireless-testing.orig/net/wireless/nl80211.c	2010-08-08 11:32:20.000000000 +0200
+++ wireless-testing/net/wireless/nl80211.c	2010-08-08 11:32:28.000000000 +0200
@@ -3604,6 +3604,21 @@ static int nl80211_authenticate(struct s
 	if (err)
 		goto unlock_rtnl;
 
+	if (key.idx >= 0) {
+		int i;
+		bool ok = false;
+		for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
+			if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
+				ok = true;
+				break;
+			}
+		}
+		if (!ok) {
+			err = -EINVAL;
+			goto out;
+		}
+	}
+
 	if (!rdev->ops->auth) {
 		err = -EOPNOTSUPP;
 		goto out;