KeyUtils.hpp

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/*
 * Copyright 2014 CyberVision, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef KEYUTILS_HPP_
#define KEYUTILS_HPP_

#include <botan/botan.h>
#include <string>
#include <utility>
#include <cstdint>
#include <memory>
#include <boost/scoped_array.hpp>

namespace kaa {

typedef std::pair<Botan::MemoryVector<std::uint8_t>, std::string> KeyPair;

class KeyUtils {
public:
    KeyPair generateKeyPair(std::size_t length);

    Botan::SymmetricKey generateSessionKey(std::size_t length);

    static Botan::MemoryVector<std::uint8_t> loadPublicKey(const std::string& fileName);

    static std::string loadPrivateKey(const std::string& fileName);

    static KeyPair loadKeyPair(const std::string& pubFileName, const std::string& privFileName);

    static void saveKeyPair(const KeyPair& pair, const std::string& pubFileName, const std::string& privFileName);

    static void savePublicKey(const Botan::MemoryVector<std::uint8_t>& key, const std::string& pubFileName);

    static void savePrivateKey(const std::string& key, const std::string& privFileName);

private:
    static void readFile(const std::string& fileName, boost::scoped_array<char>& buf, std::size_t& len);

private:
    Botan::AutoSeeded_RNG     rng_;
};

}

#endif /* KEYUTILS_HPP_ */