key-params.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2013-2017 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.
 */

#ifndef NDN_SECURITY_KEY_PARAMS_HPP
#define NDN_SECURITY_KEY_PARAMS_HPP

#include "security-common.hpp"
#include "../name-component.hpp"

namespace ndn {

class KeyParams
{
public:
  class Error : public std::runtime_error
  {
  public:
    explicit
    Error(const std::string& what)
      : std::runtime_error(what)
    {
    }
  };

  virtual
  ~KeyParams();

  KeyType
  getKeyType() const
  {
    return m_keyType;
  }

  KeyIdType
  getKeyIdType() const
  {
    return m_keyIdType;
  }

  const name::Component&
  getKeyId() const
  {
    return m_keyId;
  }

  void
  setKeyId(const name::Component& keyId)
  {
    m_keyId = keyId;
  }

protected:
  KeyParams(KeyType keyType, KeyIdType keyIdType);

  KeyParams(KeyType keyType, const name::Component& keyId);

private:
  KeyType m_keyType;
  KeyIdType m_keyIdType;
  name::Component m_keyId;
};


namespace detail {

class RsaKeyParamsInfo
{
public:
  static constexpr KeyType
  getType()
  {
    return KeyType::RSA;
  }

  static uint32_t
  checkKeySize(uint32_t size);

  static uint32_t
  getDefaultSize();
};

class EcKeyParamsInfo
{
public:
  static constexpr KeyType
  getType()
  {
    return KeyType::EC;
  }

  static uint32_t
  checkKeySize(uint32_t size);

  static uint32_t
  getDefaultSize();
};

} // namespace detail


template<typename KeyParamsInfo>
class SimplePublicKeyParams : public KeyParams
{
public:
  explicit
  SimplePublicKeyParams(const name::Component& keyId,
                        uint32_t size = KeyParamsInfo::getDefaultSize())
    : KeyParams(KeyParamsInfo::getType(), keyId)
  {
    setKeySize(size);
  }

  explicit
  SimplePublicKeyParams(uint32_t size = KeyParamsInfo::getDefaultSize(),
                        KeyIdType keyIdType = KeyIdType::RANDOM)
    : KeyParams(KeyParamsInfo::getType(), keyIdType)
  {
    setKeySize(size);
  }

  uint32_t
  getKeySize() const
  {
    return m_size;
  }

private:
  void
  setKeySize(uint32_t size)
  {
    m_size = KeyParamsInfo::checkKeySize(size);
  }

  uint32_t
  getDefaultKeySize() const
  {
    return KeyParamsInfo::getDefaultSize();
  }

private:
  uint32_t m_size;
};

typedef SimplePublicKeyParams<detail::RsaKeyParamsInfo> RsaKeyParams;

typedef SimplePublicKeyParams<detail::EcKeyParamsInfo> EcKeyParams;


namespace detail {

class AesKeyParamsInfo
{
public:
  static constexpr KeyType
  getType()
  {
    return KeyType::AES;
  }

  static uint32_t
  checkKeySize(uint32_t size);

  static uint32_t
  getDefaultSize();
};

} // namespace detail


template<typename KeyParamsInfo>
class SimpleSymmetricKeyParams : public KeyParams
{
public:
  explicit
  SimpleSymmetricKeyParams(const name::Component& keyId,
                           uint32_t size = KeyParamsInfo::getDefaultSize())
    : KeyParams(KeyParamsInfo::getType(), keyId)
  {
    setKeySize(size);
  }

  explicit
  SimpleSymmetricKeyParams(uint32_t size = KeyParamsInfo::getDefaultSize(),
                           KeyIdType keyIdType = KeyIdType::RANDOM)
    : KeyParams(KeyParamsInfo::getType(), keyIdType)
  {
    setKeySize(size);
  }

  uint32_t
  getKeySize() const
  {
    return m_size;
  }

private:
  void
  setKeySize(uint32_t size)
  {
    m_size = KeyParamsInfo::checkKeySize(size);
  }

  uint32_t
  getDefaultKeySize() const
  {
    return KeyParamsInfo::getDefaultSize();
  }

private:
  uint32_t m_size;
};

typedef SimpleSymmetricKeyParams<detail::AesKeyParamsInfo> AesKeyParams;

} // namespace ndn

#endif // NDN_SECURITY_KEY_PARAMS_HPP