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/* -*- 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_UTIL_HPP
#define NDN_TOOLS_NDNSEC_UTIL_HPP
#include <iostream>
#include <fstream>
#include <string>
#include <cstring>
#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 <boost/tokenizer.hpp>
#include <boost/asio.hpp>
#include <boost/exception/all.hpp>
#include "security/cryptopp.hpp"
#include "security/key-chain.hpp"
#include "util/io.hpp"
bool
getPassword(std::string& password, const std::string& prompt)
{
bool isReady = false;
char* pw0 = 0;
pw0 = getpass(prompt.c_str());
if (!pw0)
return false;
std::string password1 = pw0;
memset(pw0, 0, strlen(pw0));
pw0 = getpass("Confirm:");
if (!pw0)
{
char* pw1 = const_cast<char*>(password1.c_str());
memset(pw1, 0, password1.size());
return false;
}
if (!password1.compare(pw0))
{
isReady = true;
password.swap(password1);
}
char* pw1 = const_cast<char*>(password1.c_str());
memset(pw1, 0, password1.size());
memset(pw0, 0, strlen(pw0));
if (password.empty())
return false;
return isReady;
}
ndn::shared_ptr<ndn::IdentityCertificate>
getIdentityCertificate(const std::string& fileName)
{
if (fileName == "-")
return ndn::io::load<ndn::IdentityCertificate>(std::cin);
else
return ndn::io::load<ndn::IdentityCertificate>(fileName);
}
/**
* @brief An accumulating option value to handle multiple incrementing options.
*
* Based on https://gitorious.org/bwy/bwy/source/8753148c324ddfacb1f3cdc315650586bd7b75a4:use/accumulator.hpp
* @sa http://benjaminwolsey.de/node/103
*/
template<typename T>
class AccumulatorType : public boost::program_options::value_semantic
{
public:
explicit
AccumulatorType(T* store)
: m_store(store)
, m_interval(1)
, m_default(0)
{
}
virtual
~AccumulatorType()
{
}
/// @brief Set the default value for this option.
AccumulatorType*
setDefaultValue(const T& t)
{
m_default = t;
return this;
}
/**
* @brief Set the interval for this option.
*
* Unlike for program_options::value, this specifies a value
* to be applied on each occurrence of the option.
*/
AccumulatorType*
setInterval(const T& t) {
m_interval = t;
return this;
}
virtual std::string
name() const
{
return std::string();
}
// There are no tokens for an AccumulatorType
virtual unsigned
min_tokens() const
{
return 0;
}
virtual unsigned
max_tokens() const
{
return 0;
}
// Accumulating from different sources is silly.
virtual bool
is_composing() const
{
return false;
}
// Requiring one or more appearances is unlikely.
virtual bool
is_required() const
{
return false;
}
/**
* @brief Parse options
*
* Every appearance of the option simply increments the value
* There should never be any tokens.
*/
virtual void
parse(boost::any& value_store,
const std::vector<std::string>& new_tokens,
bool utf8) const
{
if (value_store.empty())
value_store = T();
boost::any_cast<T&>(value_store) += m_interval;
}
/**
* @brief If the option doesn't appear, this is the default value.
*/
virtual bool
apply_default(boost::any& value_store) const
{
value_store = m_default;
return true;
}
/**
* @brief Notify the user function with the value of the value store.
*/
virtual void
notify(const boost::any& value_store) const
{
const T* val = boost::any_cast<T>(&value_store);
if (m_store)
*m_store = *val;
}
private:
T* m_store;
T m_interval;
T m_default;
};
template<typename T>
AccumulatorType<T>* accumulator()
{
return new AccumulatorType<T>(0);
}
template<typename T>
AccumulatorType<T>* accumulator(T* store)
{
return new AccumulatorType<T>(store);
}
#endif // NDN_TOOLS_NDNSEC_UTIL_HPP