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

Change-Id: I058510acc1a0361fed43d94c7a0b545416a9efb4
diff --git a/tools/ndnsec-dskgen.cpp b/tools/ndnsec-dskgen.cpp
new file mode 100644
index 0000000..61f1fbf
--- /dev/null
+++ b/tools/ndnsec-dskgen.cpp
@@ -0,0 +1,143 @@
+/* -*- 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 <cryptopp/base64.h>
+
+#include "security/key-chain.hpp"
+#include "security/signature-sha256-with-rsa.hpp"
+
+using namespace ndn;
+namespace po = boost::program_options;
+
+
+int main(int argc, char** argv)
+{
+  std::string identityName;
+  char keyType = 'r';
+  int keySize = 2048;
+
+  // po::options_description desc("General Usage\n  ndn-keygen [-h] [-d] [-i] [-t type] [-s size] identity\nGeneral options");
+  po::options_description desc("General Usage\n  ndn-keygen [-h] identity\nGeneral options");
+  desc.add_options()
+    ("help,h", "produce help message")
+    ("identity_name,n", po::value<std::string>(&identityName), "identity name, for example, /ndn/ucla.edu/alice")
+    // ("type,t", po::value<char>(&keyType)->default_value('r'), "optional, key type, r for RSA key (default)")
+    // ("size,s", po::value<int>(&keySize)->default_value(2048), "optional, key size, 2048 (default)")
+    ;
+
+  po::positional_options_description p;
+  p.add("identity_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;
+    }
+
+  if (0 == vm.count("identity_name"))
+    {
+      std::cerr << "identity_name must be specified" << std::endl;
+      std::cerr << desc << std::endl;
+      return 1;
+    }
+
+  KeyChain keyChain;
+
+  Name defaultCertName = keyChain.getDefaultCertificateNameForIdentity(identityName);
+  bool isDefaultDsk = false;
+  if(defaultCertName.get(-3).toEscapedString().substr(0,4) == "dsk-")
+    isDefaultDsk = true;
+
+  Name signingCertName;
+  shared_ptr<IdentityCertificate> kskCert;
+  if(isDefaultDsk)
+    {
+      shared_ptr<IdentityCertificate> dskCert = keyChain.getCertificate(defaultCertName);
+      SignatureSha256WithRsa sha256sig(dskCert->getSignature());
+
+      Name keyLocatorName = sha256sig.getKeyLocator().getName(); // will throw exception if keylocator is absent or it is not a name
+
+      Name kskName = IdentityCertificate::certificateNameToPublicKeyName(keyLocatorName);
+      Name kskCertName = keyChain.getDefaultCertificateNameForKey(kskName);
+      signingCertName = kskCertName;
+      kskCert = keyChain.getCertificate(kskCertName);
+    }
+  else
+    {
+      signingCertName = defaultCertName;
+      kskCert = keyChain.getCertificate(defaultCertName);
+    }
+
+  Name newKeyName;
+  // if (vm.count("type"))
+  if (true)
+    {
+      switch(keyType)
+      {
+      case 'r':
+        {
+          try
+            {
+              newKeyName = keyChain.generateRSAKeyPair(Name(identityName), false, keySize);
+
+              if(0 == newKeyName.size())
+                {
+		  std::cerr << "fail to generate key!" << std::endl;
+                  return 1;
+                }
+	      break;
+            }
+          catch(std::exception &e)
+            {
+              std::cerr << "ERROR: " << e.what() << std::endl;
+              return 1;
+            }
+        }
+      default:
+        std::cerr << "Unrecongized key type" << "\n";
+        std::cerr << desc << std::endl;
+        return 1;
+      }
+    }
+
+
+  Name certName = newKeyName.getPrefix(newKeyName.size()-1);
+  certName.append("KEY").append(newKeyName.get(-1)).append("ID-CERT").appendVersion ();
+
+  shared_ptr<IdentityCertificate> certificate = make_shared<IdentityCertificate>();
+  certificate->setName(certName);
+  certificate->setNotBefore(kskCert->getNotBefore());
+  certificate->setNotAfter(kskCert->getNotAfter());
+
+  certificate->setPublicKeyInfo(*keyChain.getPublicKey(newKeyName));
+
+  const std::vector<CertificateSubjectDescription>& subList = kskCert->getSubjectDescriptionList();
+  std::vector<CertificateSubjectDescription>::const_iterator it = subList.begin();
+  for(; it != subList.end(); it++)
+      certificate->addSubjectDescription(*it);
+
+  certificate->encode();
+
+  keyChain.sign(*certificate, signingCertName);
+
+  keyChain.addCertificateAsIdentityDefault(*certificate);
+
+  return 0;
+}