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signer-filter.cpp
Go to the documentation of this file.
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2013-2017 Regents of the University of California.
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*
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* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
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*
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* ndn-cxx library is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later version.
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*
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* ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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*
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* You should have received copies of the GNU General Public License and GNU Lesser
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* General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* See AUTHORS.md for complete list of ndn-cxx authors and contributors.
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*/
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#include "
signer-filter.hpp
"
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#include "
private-key.hpp
"
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#include "../detail/openssl-helper.hpp"
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#include <boost/lexical_cast.hpp>
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namespace
ndn
{
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namespace
security
{
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namespace
transform
{
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class
SignerFilter::Impl
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{
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public
:
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detail::EvpMdCtx
ctx
;
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};
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SignerFilter::SignerFilter
(
DigestAlgorithm
algo,
const
PrivateKey
& key)
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: m_impl(
make_unique
<
Impl
>())
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{
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const
EVP_MD* md =
detail::digestAlgorithmToEvpMd
(algo);
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if
(md ==
nullptr
)
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BOOST_THROW_EXCEPTION(
Error
(
getIndex
(),
"Unsupported digest algorithm "
+
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boost::lexical_cast<std::string>(algo)));
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if
(EVP_DigestSignInit(m_impl->ctx,
nullptr
, md,
nullptr
,
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reinterpret_cast<EVP_PKEY*>(key.getEvpPkey())) != 1)
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BOOST_THROW_EXCEPTION(
Error
(
getIndex
(),
"Failed to initialize signing context with "
+
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boost::lexical_cast<std::string>(algo) +
" digest and "
+
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boost::lexical_cast<std::string>(key.
getKeyType
()) +
" key"
));
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}
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SignerFilter::~SignerFilter
() =
default
;
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size_t
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SignerFilter::convert(
const
uint8_t* buf,
size_t
size)
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{
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if
(EVP_DigestSignUpdate(m_impl->ctx, buf, size) != 1)
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BOOST_THROW_EXCEPTION(
Error
(
getIndex
(),
"Failed to accept more input"
));
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return
size;
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}
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void
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SignerFilter::finalize()
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{
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size_t
sigLen = 0;
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if
(EVP_DigestSignFinal(m_impl->ctx,
nullptr
, &sigLen) != 1)
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BOOST_THROW_EXCEPTION(
Error
(
getIndex
(),
"Failed to estimate buffer length"
));
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auto
buffer = make_unique<OBuffer>(sigLen);
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if
(EVP_DigestSignFinal(m_impl->ctx, buffer->data(), &sigLen) != 1)
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BOOST_THROW_EXCEPTION(
Error
(
getIndex
(),
"Failed to finalize signature"
));
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buffer->erase(buffer->begin() + sigLen, buffer->end());
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setOutputBuffer
(std::move(buffer));
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flushAllOutput
();
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}
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unique_ptr<Transform>
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signerFilter
(
DigestAlgorithm
algo,
const
PrivateKey
& key)
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{
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return
make_unique<SignerFilter>(algo, key);
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}
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}
// namespace transform
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}
// namespace security
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}
// namespace ndn
ndn
Copyright (c) 2011-2015 Regents of the University of California.
Definition:
ndn-strategy-choice-helper.hpp:34
ndn::security::transform::SignerFilter::~SignerFilter
~SignerFilter()
ndn::security::transform::SignerFilter::Impl::ctx
detail::EvpMdCtx ctx
Definition:
signer-filter.cpp:35
ndn::make_unique
unique_ptr< T > make_unique(Args &&...args)
Definition:
backports.hpp:73
private-key.hpp
ndn::security::transform::Transform::flushAllOutput
void flushAllOutput()
Read the all the content from output buffer and write it into next module.
Definition:
transform-base.cpp:96
websocketpp::transport::asio::socket::error::security
Catch-all error for security policy errors that don't fit in other categories.
Definition:
base.hpp:79
ndn::security::transform::signerFilter
unique_ptr< Transform > signerFilter(DigestAlgorithm algo, const PrivateKey &key)
Definition:
signer-filter.cpp:83
signer-filter.hpp
ndn::security::transform::Transform::setOutputBuffer
void setOutputBuffer(unique_ptr< OBuffer > buffer)
Set output buffer to buffer.
Definition:
transform-base.cpp:104
ndn::security::transform::SignerFilter::Impl
Definition:
signer-filter.cpp:32
ndn::security::transform::PrivateKey::getKeyType
KeyType getKeyType() const
Get the type of the private key.
Definition:
private-key.cpp:88
ndn::security::detail::digestAlgorithmToEvpMd
const EVP_MD * digestAlgorithmToEvpMd(DigestAlgorithm algo)
Definition:
openssl-helper.cpp:29
ndn::security::transform::PrivateKey
Abstraction of private key in crypto transformation.
Definition:
private-key.hpp:38
ndn::security::transform::Error
Base class of transformation error.
Definition:
transform-base.hpp:47
transform
ndn::security::transform::SignerFilter::SignerFilter
SignerFilter(DigestAlgorithm algo, const PrivateKey &key)
Create a module to sign using digest algorithm algo and private key key.
Definition:
signer-filter.cpp:39
ndn::security::detail::EvpMdCtx
Definition:
openssl-helper.hpp:38
ndn::DigestAlgorithm
DigestAlgorithm
Definition:
security-common.hpp:105
ndn::security::transform::Downstream::getIndex
size_t getIndex() const
Get the module index.
Definition:
transform-base.hpp:125
ndnSIM
ndn-cxx
src
security
transform
signer-filter.cpp
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