tools: ndnsec code reorganization

Change-Id: I94bc0e4904e90370724e8e7ccc56221e64b2ac24
diff --git a/tools/ndnsec/op-tool.hpp b/tools/ndnsec/op-tool.hpp
new file mode 100644
index 0000000..d04d886
--- /dev/null
+++ b/tools/ndnsec/op-tool.hpp
@@ -0,0 +1,97 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2014 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ *
+ * @author Yingdi Yu <http://irl.cs.ucla.edu/~yingdi/>
+ */
+
+#ifndef NDN_TOOLS_NDNSEC_OP_TOOL_HPP
+#define NDN_TOOLS_NDNSEC_OP_TOOL_HPP
+
+#include "util.hpp"
+
+using namespace std;
+
+int
+ndnsec_op_tool(int argc, char** argv)
+{
+  using namespace ndn;
+  namespace po = boost::program_options;
+
+  std::string command;
+
+  po::options_description description("General options");
+  description.add_options()
+    ("help,h", "produce this help message")
+    ("command", po::value<std::string>(&command), "command")
+    ;
+
+  po::positional_options_description p;
+  p.add("command", 1);
+
+  po::variables_map vm;
+  try
+    {
+      po::store(po::command_line_parser(argc, argv).options(description).positional(p).run(),
+                vm);
+      po::notify(vm);
+    }
+  catch (const std::exception& e)
+    {
+      std::cerr << "ERROR: " << e.what() << std::endl;
+      std::cerr << description << std::endl;
+      return -1;
+    }
+
+  if (vm.count("help") != 0)
+    {
+      std::cerr << description << std::endl;
+      return 0;
+    }
+
+  if (vm.count("command") == 0)
+    {
+      std::cerr << "command must be specified" << std::endl;
+      std::cerr << description << std::endl;
+      return 1;
+    }
+
+  if (command == "sign") // the content to be signed from stdin
+    {
+      KeyChain keyChain;
+
+      Buffer dataToSign((istreambuf_iterator<char>(cin)), istreambuf_iterator<char>());
+
+      Signature signature = keyChain.sign(dataToSign.buf(), dataToSign.size(),
+                                          keyChain.getDefaultCertificateName());
+
+      if (signature.getValue().value_size() == 0)
+        {
+          std::cerr << "Error signing with default key" << std::endl;
+          return -1;
+        }
+
+      std::cout.write(reinterpret_cast<const char*>(signature.getValue().wire()),
+                      signature.getValue().size());
+    }
+
+  return 0;
+}
+
+#endif // NDN_TOOLS_NDNSEC_OP_TOOL_HPP