add tests for Ascii WEP keys and to test invalid parameters

server/site_tests/network_WiFiSecMat/003AsciiKeyWEP40

+# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{ "name":"CheckAsciiWEPKey40",
+  "steps":[             # Channel [1,6,11]
+    [ "create",         { "type":"hostap" } ],
+    [ "config",         { "channel":"2412", "mode":"11g",
+#                          "authmode":"open", "wepmode":"on",
+                          "wepmode":"on",
+                          # 5 bytes :   01234
+                          "wep_key0":  '"abcde"',
+                          "wep_key1":  '"vwxyz"',
+                          "wep_key2":  '"decba"',
+                          "wep_key3":  '"zyxwv"' 
+                        }
+    ],
+
+    # key index 0, 40-bit WEP
+    [ "config",         { "deftxkey":"0" } ],
+    [ "connect",        { "security":"wep", "psk":"0:abcde" } ],
+    [ "client_ping",    { "count":"10" } ],
+    [ "disconnect" ],
+    [ "deconfig" ],
+
+    # key index 1, 40-bit WEP
+    [ "config",         { "deftxkey":"1" } ],
+    [ "connect",        { "security":"wep", "psk":"1:vwxyz" } ],
+    [ "client_ping",    { "count":"10" } ],
+    [ "disconnect" ],
+    [ "deconfig" ],
+
+    # key index 2, 40-bit WEP
+    [ "config",         { "deftxkey":"2" } ],
+    [ "connect",        { "security":"wep", "psk":"2:decba" } ],
+    [ "client_ping",    { "count":"10" } ],
+    [ "disconnect" ],
+    [ "deconfig" ],
+
+    # key index 3, 40-bit WEP
+    [ "config",         { "deftxkey":"3" } ],
+    [ "connect",        { "security":"wep", "psk":"3:zyxwv" } ],
+    [ "client_ping",    { "count":"10" } ],
+    [ "disconnect" ],
+
+    [ "destroy" ],
+  ],
+}