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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.
*
* @author Zhiyi Zhang <dreamerbarrychang@gmail.com>
*/
#include "safe-bag.hpp"
#include "encoding/encoding-buffer.hpp"
#include "encoding/tlv-security.hpp"
#include "util/concepts.hpp"
namespace ndn {
namespace security {
BOOST_CONCEPT_ASSERT((WireEncodable<SafeBag>));
BOOST_CONCEPT_ASSERT((WireDecodable<SafeBag>));
SafeBag::SafeBag() = default;
SafeBag::SafeBag(const Block& wire)
{
this->wireDecode(wire);
}
SafeBag::SafeBag(const Data& certificate,
const Buffer& encryptedKeyBag)
: m_certificate(certificate)
, m_encryptedKeyBag(encryptedKeyBag)
{
}
SafeBag::SafeBag(const Data& certificate,
const uint8_t* encryptedKey,
size_t encryptedKeyLen)
: m_certificate(certificate)
, m_encryptedKeyBag(encryptedKey, encryptedKeyLen)
{
}
///////////////////////////////////////////////////// encode & decode
template<encoding::Tag TAG>
size_t
SafeBag::wireEncode(EncodingImpl<TAG>& encoder) const
{
size_t totalLength = 0;
// EncryptedKeyBag
totalLength += encoder.prependByteArrayBlock(tlv::security::EncryptedKeyBag,
m_encryptedKeyBag.get(),
m_encryptedKeyBag.size());
// Certificate
totalLength += this->m_certificate.wireEncode(encoder);
totalLength += encoder.prependVarNumber(totalLength);
totalLength += encoder.prependVarNumber(tlv::security::SafeBag);
return totalLength;
}
NDN_CXX_DEFINE_WIRE_ENCODE_INSTANTIATIONS(SafeBag);
const Block&
SafeBag::wireEncode() const
{
EncodingEstimator estimator;
size_t estimatedSize = wireEncode(estimator);
EncodingBuffer buffer(estimatedSize, 0);
wireEncode(buffer);
this->m_wire = buffer.block();
return m_wire;
}
void
SafeBag::wireDecode(const Block& wire)
{
if (wire.type() != tlv::security::SafeBag)
BOOST_THROW_EXCEPTION(tlv::Error("Unexpected TLV type when decoding safebag"));
this->m_wire = wire;
m_wire.parse();
Block::element_const_iterator it = m_wire.elements_begin();
// Certificate must be the first part
if (it != m_wire.elements_end()) {
this->m_certificate.wireDecode(*it);
it++;
}
else
BOOST_THROW_EXCEPTION(tlv::Error("Unexpected TLV structure when decoding certificate"));
// EncryptedKeyBag
if (it != m_wire.elements_end() && it->type() == tlv::security::EncryptedKeyBag) {
this->m_encryptedKeyBag = Buffer(it->value(), it->value_size());
it++;
}
else
BOOST_THROW_EXCEPTION(tlv::Error("Unexpected TLV structure when decoding encryptedkeybag"));
// Check if end
if (it != m_wire.elements_end())
BOOST_THROW_EXCEPTION(tlv::Error("Unexpected TLV structure after decoding the block"));
}
} // namespace security
} // namespace ndn