blob: 234c48d3533fc4d97410a9961fe37158d1f34ead [file] [log] [blame]
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
* Copyright (c) 2013-2016 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.
*/
#include "tpm.hpp"
#include "back-end.hpp"
#include "../../encoding/buffer-stream.hpp"
namespace ndn {
namespace security {
namespace tpm {
Tpm::Tpm(const std::string& scheme, const std::string& location, unique_ptr<BackEnd> backEnd)
: m_scheme(scheme)
, m_location(location)
, m_backEnd(std::move(backEnd))
{
}
Tpm::~Tpm() = default;
std::string
Tpm::getTpmLocator() const
{
return m_scheme + ":" + m_location;
}
bool
Tpm::hasKey(const Name& keyName) const
{
return m_backEnd->hasKey(keyName);
}
Name
Tpm::createKey(const Name& identityName, const KeyParams& params)
{
switch (params.getKeyType()) {
case KeyType::RSA:
case KeyType::EC: {
unique_ptr<KeyHandle> keyHandle = m_backEnd->createKey(identityName, params);
Name keyName = keyHandle->getKeyName();
m_keys[keyName] = std::move(keyHandle);
return keyName;
}
default: {
BOOST_THROW_EXCEPTION(Error("Fail to create a key pair: Unsupported key type"));
}
}
}
void
Tpm::deleteKey(const Name& keyName)
{
auto it = m_keys.find(keyName);
if (it != m_keys.end())
m_keys.erase(it);
m_backEnd->deleteKey(keyName);
}
ConstBufferPtr
Tpm::getPublicKey(const Name& keyName) const
{
const KeyHandle* key = findKey(keyName);
if (key == nullptr)
return nullptr;
else
return key->derivePublicKey();
}
ConstBufferPtr
Tpm::sign(const uint8_t* buf, size_t size, const Name& keyName, DigestAlgorithm digestAlgorithm) const
{
const KeyHandle* key = findKey(keyName);
if (key == nullptr)
return nullptr;
else
return key->sign(digestAlgorithm, buf, size);
}
ConstBufferPtr
Tpm::decrypt(const uint8_t* buf, size_t size, const Name& keyName) const
{
const KeyHandle* key = findKey(keyName);
if (key == nullptr)
return nullptr;
else
return key->decrypt(buf, size);
}
ConstBufferPtr
Tpm::exportPrivateKey(const Name& keyName, const char* pw, size_t pwLen)
{
return m_backEnd->exportKey(keyName, pw, pwLen);
}
bool
Tpm::importPrivateKey(const Name& keyName, const uint8_t* pkcs8, size_t pkcs8Len, const char* pw, size_t pwLen)
{
try {
m_backEnd->importKey(keyName, pkcs8, pkcs8Len, pw, pwLen);
}
catch (const BackEnd::Error&) {
return false;
}
return true;
}
const KeyHandle*
Tpm::findKey(const Name& keyName) const
{
auto it = m_keys.find(keyName);
if (it != m_keys.end())
return it->second.get();
unique_ptr<KeyHandle> handle = m_backEnd->getKeyHandle(keyName);
if (handle != nullptr) {
KeyHandle* key = handle.get();
m_keys[keyName] = std::move(handle);
return key;
}
return nullptr;
}
} // namespace tpm
} // namespace security
} // namespace ndn