Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 1 | /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
Davide Pesavento | 8703953 | 2017-09-16 15:15:39 -0400 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) 2013-2017 Regents of the University of California. |
Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 4 | * |
| 5 | * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions). |
| 6 | * |
| 7 | * ndn-cxx library is free software: you can redistribute it and/or modify it under the |
| 8 | * terms of the GNU Lesser General Public License as published by the Free Software |
| 9 | * Foundation, either version 3 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY |
| 12 | * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A |
| 13 | * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
| 14 | * |
| 15 | * You should have received copies of the GNU General Public License and GNU Lesser |
| 16 | * General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see |
| 17 | * <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | * See AUTHORS.md for complete list of ndn-cxx authors and contributors. |
| 20 | */ |
| 21 | |
| 22 | #include "signer-filter.hpp" |
Davide Pesavento | 06f1bdf | 2017-09-16 18:59:15 -0400 | [diff] [blame] | 23 | #include "private-key.hpp" |
Davide Pesavento | 8703953 | 2017-09-16 15:15:39 -0400 | [diff] [blame] | 24 | #include "../detail/openssl-helper.hpp" |
| 25 | |
| 26 | #include <boost/lexical_cast.hpp> |
Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 27 | |
| 28 | namespace ndn { |
| 29 | namespace security { |
| 30 | namespace transform { |
| 31 | |
| 32 | class SignerFilter::Impl |
| 33 | { |
| 34 | public: |
Davide Pesavento | 3504cc4 | 2017-09-17 15:28:10 -0400 | [diff] [blame^] | 35 | detail::EvpMdCtx ctx; |
Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 36 | }; |
| 37 | |
Davide Pesavento | 06f1bdf | 2017-09-16 18:59:15 -0400 | [diff] [blame] | 38 | |
Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 39 | SignerFilter::SignerFilter(DigestAlgorithm algo, const PrivateKey& key) |
Davide Pesavento | 06f1bdf | 2017-09-16 18:59:15 -0400 | [diff] [blame] | 40 | : m_impl(make_unique<Impl>()) |
Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 41 | { |
Davide Pesavento | 8703953 | 2017-09-16 15:15:39 -0400 | [diff] [blame] | 42 | const EVP_MD* md = detail::digestAlgorithmToEvpMd(algo); |
| 43 | if (md == nullptr) |
| 44 | BOOST_THROW_EXCEPTION(Error(getIndex(), "Unsupported digest algorithm " + |
| 45 | boost::lexical_cast<std::string>(algo))); |
Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 46 | |
Davide Pesavento | 06f1bdf | 2017-09-16 18:59:15 -0400 | [diff] [blame] | 47 | if (EVP_DigestSignInit(m_impl->ctx, nullptr, md, nullptr, |
| 48 | reinterpret_cast<EVP_PKEY*>(key.getEvpPkey())) != 1) |
| 49 | BOOST_THROW_EXCEPTION(Error(getIndex(), "Failed to initialize signing context with " + |
| 50 | boost::lexical_cast<std::string>(algo) + " digest and " + |
| 51 | boost::lexical_cast<std::string>(key.getKeyType()) + " key")); |
Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 52 | } |
| 53 | |
Davide Pesavento | 06f1bdf | 2017-09-16 18:59:15 -0400 | [diff] [blame] | 54 | SignerFilter::~SignerFilter() = default; |
| 55 | |
Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 56 | size_t |
| 57 | SignerFilter::convert(const uint8_t* buf, size_t size) |
| 58 | { |
Davide Pesavento | 06f1bdf | 2017-09-16 18:59:15 -0400 | [diff] [blame] | 59 | if (EVP_DigestSignUpdate(m_impl->ctx, buf, size) != 1) |
| 60 | BOOST_THROW_EXCEPTION(Error(getIndex(), "Failed to accept more input")); |
Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 61 | |
Davide Pesavento | 06f1bdf | 2017-09-16 18:59:15 -0400 | [diff] [blame] | 62 | return size; |
Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | void |
| 66 | SignerFilter::finalize() |
| 67 | { |
Davide Pesavento | 06f1bdf | 2017-09-16 18:59:15 -0400 | [diff] [blame] | 68 | size_t sigLen = 0; |
| 69 | if (EVP_DigestSignFinal(m_impl->ctx, nullptr, &sigLen) != 1) |
| 70 | BOOST_THROW_EXCEPTION(Error(getIndex(), "Failed to estimate buffer length")); |
Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 71 | |
Davide Pesavento | 06f1bdf | 2017-09-16 18:59:15 -0400 | [diff] [blame] | 72 | auto buffer = make_unique<OBuffer>(sigLen); |
| 73 | if (EVP_DigestSignFinal(m_impl->ctx, buffer->data(), &sigLen) != 1) |
| 74 | BOOST_THROW_EXCEPTION(Error(getIndex(), "Failed to finalize signature")); |
Yingdi Yu | b263f15 | 2015-07-12 16:50:13 -0700 | [diff] [blame] | 75 | |
| 76 | buffer->erase(buffer->begin() + sigLen, buffer->end()); |
| 77 | setOutputBuffer(std::move(buffer)); |
| 78 | |
| 79 | flushAllOutput(); |
| 80 | } |
| 81 | |
| 82 | unique_ptr<Transform> |
| 83 | signerFilter(DigestAlgorithm algo, const PrivateKey& key) |
| 84 | { |
| 85 | return make_unique<SignerFilter>(algo, key); |
| 86 | } |
| 87 | |
| 88 | } // namespace transform |
| 89 | } // namespace security |
| 90 | } // namespace ndn |