tools: Add security tools; Add waf build options for tools.

Change-Id: I058510acc1a0361fed43d94c7a0b545416a9efb4
diff --git a/tools/ndnsec-set-default.cpp b/tools/ndnsec-set-default.cpp
new file mode 100644
index 0000000..873b15a
--- /dev/null
+++ b/tools/ndnsec-set-default.cpp
@@ -0,0 +1,85 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013, Regents of the University of California
+ *                     Yingdi Yu
+ *
+ * BSD license, See the LICENSE file for more information
+ *
+ * Author: Yingdi Yu <yingdi@cs.ucla.edu>
+ */
+
+#include <iostream>
+#include <fstream>
+
+#include <boost/program_options/options_description.hpp>
+#include <boost/program_options/variables_map.hpp>
+#include <boost/program_options/parsers.hpp>
+#include <boost/date_time/posix_time/posix_time.hpp>
+#include <cryptopp/base64.h>
+
+#include "security/key-chain.hpp"
+
+using namespace ndn;
+namespace po = boost::program_options;
+
+int main(int argc, char** argv)	
+{
+  std::string certFileName;
+  bool setDefaultId = true;
+  bool setDefaultKey = false;
+  bool setDefaultCert = false;
+  std::string name;
+
+  po::options_description desc("General Usage\n  ndn-set-default [-h] [-K|C] name\nGeneral options");
+  desc.add_options()
+    ("help,h", "produce help message")
+    ("default_key,K", "set default key of the identity")
+    ("default_cert,C", "set default certificate of the key")
+    ("name,n", po::value<std::string>(&name), "the name to set")
+    ;
+
+  po::positional_options_description p;
+  p.add("name", 1);
+  po::variables_map vm;
+  po::store(po::command_line_parser(argc, argv).options(desc).positional(p).run(), vm);
+
+  po::notify(vm);
+
+  if (vm.count("help")) 
+    {
+      std::cerr << desc << std::endl;
+      return 1;
+    }
+
+  KeyChain keyChain;
+
+  if (vm.count("default_key"))
+    {
+      setDefaultKey = true;
+      setDefaultId = false;
+    }
+  else if(vm.count("default_cert"))
+    {
+      setDefaultCert = true;
+      setDefaultId = false;
+    }
+
+  if (setDefaultId)
+    {
+      Name idName(name);
+      keyChain.setDefaultIdentity(idName);
+      return 0;
+    }
+  if (setDefaultKey)
+    {
+      Name keyName(name);
+      keyChain.setDefaultKeyNameForIdentity(keyName);
+      return 0;
+    }
+  
+  if (setDefaultCert)
+    {
+      keyChain.setDefaultCertificateNameForKey(name);
+      return 0;
+    }
+}