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-rw-r--r--net/wireless/util.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 5f7e997195c..beb226e78cd 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -138,3 +138,48 @@ void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
if (wiphy->bands[band])
set_mandatory_flags_band(wiphy->bands[band], band);
}
+
+int cfg80211_validate_key_settings(struct key_params *params, int key_idx,
+ const u8 *mac_addr)
+{
+ if (key_idx > 5)
+ return -EINVAL;
+
+ /*
+ * Disallow pairwise keys with non-zero index unless it's WEP
+ * (because current deployments use pairwise WEP keys with
+ * non-zero indizes but 802.11i clearly specifies to use zero)
+ */
+ if (mac_addr && key_idx &&
+ params->cipher != WLAN_CIPHER_SUITE_WEP40 &&
+ params->cipher != WLAN_CIPHER_SUITE_WEP104)
+ return -EINVAL;
+
+ /* TODO: add definitions for the lengths to linux/ieee80211.h */
+ switch (params->cipher) {
+ case WLAN_CIPHER_SUITE_WEP40:
+ if (params->key_len != 5)
+ return -EINVAL;
+ break;
+ case WLAN_CIPHER_SUITE_TKIP:
+ if (params->key_len != 32)
+ return -EINVAL;
+ break;
+ case WLAN_CIPHER_SUITE_CCMP:
+ if (params->key_len != 16)
+ return -EINVAL;
+ break;
+ case WLAN_CIPHER_SUITE_WEP104:
+ if (params->key_len != 13)
+ return -EINVAL;
+ break;
+ case WLAN_CIPHER_SUITE_AES_CMAC:
+ if (params->key_len != 16)
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}