cfg80211: check if WEP is available for shared key auth

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>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 37902a54e9c..bb5b78eebeb 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3572,6 +3572,21 @@ static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
         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;