/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2013-2018 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 "data.hpp"
#include "encoding/buffer-stream.hpp"
#include "security/signature-sha256-with-rsa.hpp"
#include "security/transform/private-key.hpp"
#include "security/transform/public-key.hpp"
#include "security/transform/signer-filter.hpp"
#include "security/transform/step-source.hpp"
#include "security/transform/stream-sink.hpp"
#include "security/verification-helpers.hpp"
#include "util/sha256.hpp"

#include "boost-test.hpp"
#include "identity-management-fixture.hpp"
#include <boost/lexical_cast.hpp>

namespace ndn {
namespace tests {

BOOST_AUTO_TEST_SUITE(TestData)

const uint8_t CONTENT1[] = {0x53, 0x55, 0x43, 0x43, 0x45, 0x53, 0x53, 0x21};

const uint8_t DATA1[] = {
0x06, 0xc5, // Data
    0x07, 0x14, // Name
        0x08, 0x05,
            0x6c, 0x6f, 0x63, 0x61, 0x6c,
        0x08, 0x03,
            0x6e, 0x64, 0x6e,
        0x08, 0x06,
            0x70, 0x72, 0x65, 0x66, 0x69, 0x78,
    0x14, 0x04, // MetaInfo
        0x19, 0x02, // FreshnessPeriod
            0x27, 0x10,
    0x15, 0x08, // Content
        0x53, 0x55, 0x43, 0x43, 0x45, 0x53, 0x53, 0x21,
    0x16, 0x1b, // SignatureInfo
        0x1b, 0x01, // SignatureType
            0x01,
        0x1c, 0x16, // KeyLocator
            0x07, 0x14, // Name
                0x08, 0x04,
                    0x74, 0x65, 0x73, 0x74,
                0x08, 0x03,
                    0x6b, 0x65, 0x79,
                0x08, 0x07,
                    0x6c, 0x6f, 0x63, 0x61, 0x74, 0x6f, 0x72,
    0x17, 0x80, // SignatureValue
        0x2f, 0xd6, 0xf1, 0x6e, 0x80, 0x6f, 0x10, 0xbe, 0xb1, 0x6f, 0x3e, 0x31, 0xec,
        0xe3, 0xb9, 0xea, 0x83, 0x30, 0x40, 0x03, 0xfc, 0xa0, 0x13, 0xd9, 0xb3, 0xc6,
        0x25, 0x16, 0x2d, 0xa6, 0x58, 0x41, 0x69, 0x62, 0x56, 0xd8, 0xb3, 0x6a, 0x38,
        0x76, 0x56, 0xea, 0x61, 0xb2, 0x32, 0x70, 0x1c, 0xb6, 0x4d, 0x10, 0x1d, 0xdc,
        0x92, 0x8e, 0x52, 0xa5, 0x8a, 0x1d, 0xd9, 0x96, 0x5e, 0xc0, 0x62, 0x0b, 0xcf,
        0x3a, 0x9d, 0x7f, 0xca, 0xbe, 0xa1, 0x41, 0x71, 0x85, 0x7a, 0x8b, 0x5d, 0xa9,
        0x64, 0xd6, 0x66, 0xb4, 0xe9, 0x8d, 0x0c, 0x28, 0x43, 0xee, 0xa6, 0x64, 0xe8,
        0x55, 0xf6, 0x1c, 0x19, 0x0b, 0xef, 0x99, 0x25, 0x1e, 0xdc, 0x78, 0xb3, 0xa7,
        0xaa, 0x0d, 0x14, 0x58, 0x30, 0xe5, 0x37, 0x6a, 0x6d, 0xdb, 0x56, 0xac, 0xa3,
        0xfc, 0x90, 0x7a, 0xb8, 0x66, 0x9c, 0x0e, 0xf6, 0xb7, 0x64, 0xd1
};

// ---- constructor, encode, decode ----

BOOST_AUTO_TEST_CASE(DefaultConstructor)
{
  Data d;
  BOOST_CHECK_EQUAL(d.hasWire(), false);
  BOOST_CHECK_EQUAL(d.getName(), "/");
  BOOST_CHECK_EQUAL(d.getContentType(), tlv::ContentType_Blob);
  BOOST_CHECK_EQUAL(d.getFreshnessPeriod(), DEFAULT_FRESHNESS_PERIOD);
  BOOST_CHECK_EQUAL(d.getFinalBlockId(), name::Component());
  BOOST_CHECK_EQUAL(d.getContent().type(), tlv::Content);
  BOOST_CHECK_EQUAL(d.getContent().value_size(), 0);
  BOOST_CHECK(!d.getSignature());
}

class DataSigningKeyFixture
{
protected:
  DataSigningKeyFixture()
  {
    m_privKey.loadPkcs1(PRIVATE_KEY_DER, sizeof(PRIVATE_KEY_DER));
    auto buf = m_privKey.derivePublicKey();
    m_pubKey.loadPkcs8(buf->data(), buf->size());
  }

protected:
  security::transform::PrivateKey m_privKey;
  security::transform::PublicKey m_pubKey;

private:
  static const uint8_t PRIVATE_KEY_DER[632];
};

const uint8_t DataSigningKeyFixture::PRIVATE_KEY_DER[] = {
  0x30, 0x82, 0x02, 0x74, 0x02, 0x01, 0x00, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7,
  0x0d, 0x01, 0x01, 0x01, 0x05, 0x00, 0x04, 0x82, 0x02, 0x5e, 0x30, 0x82, 0x02, 0x5a, 0x02, 0x01,
  0x00, 0x02, 0x81, 0x81, 0x00, 0x9e, 0x06, 0x3e, 0x47, 0x85, 0xb2, 0x34, 0x37, 0xaa, 0x85, 0x47,
  0xac, 0x03, 0x24, 0x83, 0xb5, 0x9c, 0xa8, 0x05, 0x3a, 0x24, 0x1e, 0xeb, 0x89, 0x01, 0xbb, 0xe9,
  0x9b, 0xb2, 0xc3, 0x22, 0xac, 0x68, 0xe3, 0xf0, 0x6c, 0x02, 0xce, 0x68, 0xa6, 0xc4, 0xd0, 0xa7,
  0x06, 0x90, 0x9c, 0xaa, 0x1b, 0x08, 0x1d, 0x8b, 0x43, 0x9a, 0x33, 0x67, 0x44, 0x6d, 0x21, 0xa3,
  0x1b, 0x88, 0x9a, 0x97, 0x5e, 0x59, 0xc4, 0x15, 0x0b, 0xd9, 0x2c, 0xbd, 0x51, 0x07, 0x61, 0x82,
  0xad, 0xc1, 0xb8, 0xd7, 0xbf, 0x9b, 0xcf, 0x7d, 0x24, 0xc2, 0x63, 0xf3, 0x97, 0x17, 0xeb, 0xfe,
  0x62, 0x25, 0xba, 0x5b, 0x4d, 0x8a, 0xc2, 0x7a, 0xbd, 0x43, 0x8a, 0x8f, 0xb8, 0xf2, 0xf1, 0xc5,
  0x6a, 0x30, 0xd3, 0x50, 0x8c, 0xc8, 0x9a, 0xdf, 0xef, 0xed, 0x35, 0xe7, 0x7a, 0x62, 0xea, 0x76,
  0x7c, 0xbb, 0x08, 0x26, 0xc7, 0x02, 0x01, 0x11, 0x02, 0x81, 0x80, 0x04, 0xa5, 0xd4, 0xa7, 0xc0,
  0x2a, 0xe3, 0x6b, 0x0c, 0x8b, 0x73, 0x0c, 0x96, 0xae, 0x40, 0x1b, 0xee, 0x04, 0xf1, 0x18, 0x4c,
  0x5b, 0x43, 0x29, 0xad, 0x3a, 0x3b, 0x93, 0xa3, 0x60, 0x17, 0x9b, 0xa8, 0xbb, 0x68, 0xf4, 0x1e,
  0x33, 0x3f, 0x50, 0x32, 0xf7, 0x13, 0xf8, 0xa9, 0xe6, 0x7d, 0x79, 0x44, 0x00, 0xde, 0x72, 0xed,
  0xf2, 0x73, 0xfa, 0x7b, 0xae, 0x2a, 0x71, 0xc0, 0x40, 0xc8, 0x37, 0x6f, 0x38, 0xb2, 0x69, 0x1f,
  0xa8, 0x83, 0x7b, 0x42, 0x00, 0x73, 0x46, 0xe6, 0x4c, 0x91, 0x7f, 0x13, 0x06, 0x69, 0x06, 0xd8,
  0x3f, 0x22, 0x15, 0x75, 0xf6, 0xde, 0xcd, 0xb0, 0xbc, 0x66, 0x61, 0x91, 0x08, 0x9b, 0x2b, 0xb2,
  0x00, 0xa9, 0x67, 0x05, 0x39, 0x40, 0xb9, 0x37, 0x85, 0x88, 0x4f, 0x76, 0x79, 0x63, 0xc0, 0x88,
  0x3c, 0x86, 0xa8, 0x12, 0x94, 0x5f, 0xe4, 0x36, 0x3d, 0xea, 0xb9, 0x02, 0x41, 0x00, 0xb6, 0x2e,
  0xbb, 0xcd, 0x2f, 0x3a, 0x99, 0xe0, 0xa1, 0xa5, 0x44, 0x77, 0xea, 0x0b, 0xbe, 0x16, 0x95, 0x0e,
  0x64, 0xa7, 0x68, 0xd7, 0x4b, 0x15, 0x15, 0x23, 0xe2, 0x1e, 0x4e, 0x00, 0x2c, 0x22, 0x97, 0xae,
  0xb0, 0x74, 0xa6, 0x99, 0xd0, 0x5d, 0xb7, 0x1b, 0x10, 0x34, 0x13, 0xd2, 0x5f, 0x6e, 0x56, 0xad,
  0x85, 0x4a, 0xdb, 0xf0, 0x78, 0xbd, 0xf4, 0x8c, 0xb7, 0x9a, 0x3e, 0x99, 0xef, 0xb9, 0x02, 0x41,
  0x00, 0xde, 0x0d, 0xa7, 0x48, 0x75, 0x90, 0xad, 0x11, 0xa1, 0xac, 0xee, 0xcb, 0x41, 0x81, 0xc6,
  0xc8, 0x7f, 0xe7, 0x25, 0x94, 0xa1, 0x2a, 0x21, 0xa8, 0x57, 0xfe, 0x84, 0xf2, 0x5e, 0xb4, 0x96,
  0x35, 0xaf, 0xef, 0x2e, 0x7a, 0xf8, 0xda, 0x3f, 0xac, 0x8a, 0x3c, 0x1c, 0x9c, 0xbd, 0x44, 0xd6,
  0x90, 0xb5, 0xce, 0x1b, 0x12, 0xf9, 0x3b, 0x8c, 0x69, 0xf6, 0xa9, 0x02, 0x93, 0x48, 0x35, 0x0a,
  0x7f, 0x02, 0x40, 0x6b, 0x2a, 0x8c, 0x96, 0xd0, 0x7c, 0xd2, 0xfc, 0x9b, 0x52, 0x28, 0x46, 0x89,
  0xac, 0x8d, 0xef, 0x2a, 0x80, 0xef, 0xea, 0x01, 0x6f, 0x95, 0x93, 0xee, 0x51, 0x57, 0xd5, 0x97,
  0x4b, 0x65, 0x41, 0x86, 0x66, 0xc2, 0x26, 0x80, 0x1e, 0x3e, 0x55, 0x3e, 0x88, 0x63, 0xe2, 0x66,
  0x03, 0x47, 0x31, 0xd8, 0xa2, 0x4e, 0x68, 0x45, 0x24, 0x0a, 0xca, 0x17, 0x61, 0xd5, 0x69, 0xca,
  0x78, 0xab, 0x21, 0x02, 0x41, 0x00, 0x8f, 0xae, 0x7b, 0x4d, 0x00, 0xc7, 0x06, 0x92, 0xf0, 0x24,
  0x9a, 0x83, 0x84, 0xbd, 0x62, 0x81, 0xbc, 0x2c, 0x27, 0x60, 0x2c, 0x0c, 0x33, 0xe5, 0x66, 0x1d,
  0x28, 0xd9, 0x10, 0x1a, 0x7f, 0x4f, 0xea, 0x4f, 0x78, 0x6d, 0xb0, 0x14, 0xbf, 0xc9, 0xff, 0x17,
  0xd6, 0x47, 0x4d, 0x4a, 0xa8, 0xf4, 0x39, 0x67, 0x3e, 0xb1, 0xec, 0x8f, 0xf1, 0x71, 0xbd, 0xb8,
  0xa7, 0x50, 0x3d, 0xc7, 0xf7, 0xbb, 0x02, 0x40, 0x0d, 0x85, 0x32, 0x73, 0x9f, 0x0a, 0x33, 0x2f,
  0x4b, 0xa2, 0xbd, 0xd1, 0xb1, 0x42, 0xf0, 0x72, 0xa8, 0x7a, 0xc8, 0x15, 0x37, 0x1b, 0xde, 0x76,
  0x70, 0xce, 0xfd, 0x69, 0x20, 0x00, 0x4d, 0xc9, 0x4f, 0x35, 0x6f, 0xd1, 0x35, 0xa1, 0x04, 0x95,
  0x30, 0xe8, 0x3b, 0xd5, 0x03, 0x5a, 0x50, 0x21, 0x6d, 0xa0, 0x84, 0x39, 0xe9, 0x2e, 0x1e, 0xfc,
  0xe4, 0x82, 0x43, 0x20, 0x46, 0x7d, 0x0a, 0xb6
};

BOOST_FIXTURE_TEST_CASE(Encode, DataSigningKeyFixture)
{
  // manual data packet creation for now

  Data d(Name("/local/ndn/prefix"));
  d.setContentType(tlv::ContentType_Blob);
  d.setFreshnessPeriod(10_s);
  d.setContent(CONTENT1, sizeof(CONTENT1));

  Block signatureInfo(tlv::SignatureInfo);
  // SignatureType
  signatureInfo.push_back(makeNonNegativeIntegerBlock(tlv::SignatureType, tlv::SignatureSha256WithRsa));
  // KeyLocator
  {
    KeyLocator keyLocator;
    keyLocator.setName("/test/key/locator");
    signatureInfo.push_back(keyLocator.wireEncode());
  }
  signatureInfo.encode();

  // SignatureValue
  OBufferStream os;
  tlv::writeVarNumber(os, tlv::SignatureValue);

  OBufferStream sig;
  {
    namespace tr = security::transform;

    tr::StepSource input;
    input >> tr::signerFilter(DigestAlgorithm::SHA256, m_privKey) >> tr::streamSink(sig);

    input.write(d.getName().    wireEncode().wire(), d.getName().    wireEncode().size());
    input.write(d.getMetaInfo().wireEncode().wire(), d.getMetaInfo().wireEncode().size());
    input.write(d.getContent().              wire(), d.getContent().              size());
    input.write(signatureInfo.               wire(), signatureInfo.               size());
    input.end();
  }
  auto buf = sig.buf();
  tlv::writeVarNumber(os, buf->size());
  os.write(buf->get<char>(), buf->size());

  Block signatureValue(os.buf());
  Signature signature(signatureInfo, signatureValue);
  d.setSignature(signature);

  Block dataBlock(d.wireEncode());
  BOOST_CHECK_EQUAL_COLLECTIONS(DATA1, DATA1 + sizeof(DATA1),
                                dataBlock.begin(), dataBlock.end());
}

BOOST_FIXTURE_TEST_CASE(Decode, DataSigningKeyFixture)
{
  Block dataBlock(DATA1, sizeof(DATA1));
  Data d(dataBlock);

  BOOST_CHECK_EQUAL(d.getName().toUri(), "/local/ndn/prefix");
  BOOST_CHECK_EQUAL(d.getContentType(), static_cast<uint32_t>(tlv::ContentType_Blob));
  BOOST_CHECK_EQUAL(d.getFreshnessPeriod(), 10_s);
  BOOST_CHECK_EQUAL(std::string(reinterpret_cast<const char*>(d.getContent().value()),
                                d.getContent().value_size()), "SUCCESS!");
  BOOST_CHECK_EQUAL(d.getSignature().getType(), tlv::SignatureSha256WithRsa);

  Block block = d.getSignature().getInfo();
  block.parse();
  KeyLocator keyLocator(block.get(tlv::KeyLocator));
  BOOST_CHECK_EQUAL(keyLocator.getName().toUri(), "/test/key/locator");

  BOOST_CHECK(security::verifySignature(d, m_pubKey));
}

BOOST_FIXTURE_TEST_CASE(FullName, IdentityManagementFixture)
{
  Data d(Name("/local/ndn/prefix"));
  d.setContentType(tlv::ContentType_Blob);
  d.setFreshnessPeriod(10_s);
  d.setContent(CONTENT1, sizeof(CONTENT1));
  BOOST_CHECK_THROW(d.getFullName(), Data::Error); // FullName is unavailable without signing

  m_keyChain.sign(d);
  BOOST_CHECK_EQUAL(d.hasWire(), true);
  Name fullName = d.getFullName(); // FullName is available after signing

  BOOST_CHECK_EQUAL(d.getName().size() + 1, fullName.size());
  BOOST_CHECK_EQUAL_COLLECTIONS(d.getName().begin(), d.getName().end(),
                                fullName.begin(), fullName.end() - 1);
  BOOST_CHECK_EQUAL(fullName.get(-1).value_size(), util::Sha256::DIGEST_SIZE);

  // FullName should be cached, so value() pointer points to same memory location
  BOOST_CHECK_EQUAL(fullName.get(-1).value(), d.getFullName().get(-1).value());

  d.setFreshnessPeriod(100_s); // invalidates FullName
  BOOST_CHECK_THROW(d.getFullName(), Data::Error);

  Data d1(Block(DATA1, sizeof(DATA1)));
  BOOST_CHECK_EQUAL(d1.getFullName(),
    "/local/ndn/prefix/"
    "sha256digest=28bad4b5275bd392dbb670c75cf0b66f13f7942b21e80f55c0e86b374753a548");
}

// ---- operators ----

BOOST_AUTO_TEST_CASE(Equality)
{
  Data a;
  Data b;
  BOOST_CHECK_EQUAL(a == b, true);
  BOOST_CHECK_EQUAL(a != b, false);

  a.setName("ndn:/A");
  BOOST_CHECK_EQUAL(a == b, false);
  BOOST_CHECK_EQUAL(a != b, true);

  b.setName("ndn:/B");
  BOOST_CHECK_EQUAL(a == b, false);
  BOOST_CHECK_EQUAL(a != b, true);

  b.setName("ndn:/A");
  BOOST_CHECK_EQUAL(a == b, true);
  BOOST_CHECK_EQUAL(a != b, false);

  a.setFreshnessPeriod(10_s);
  BOOST_CHECK_EQUAL(a == b, false);
  BOOST_CHECK_EQUAL(a != b, true);

  b.setFreshnessPeriod(10_s);
  BOOST_CHECK_EQUAL(a == b, true);
  BOOST_CHECK_EQUAL(a != b, false);

  static const uint8_t someData[] = "someData";
  a.setContent(someData, sizeof(someData));
  BOOST_CHECK_EQUAL(a == b, false);
  BOOST_CHECK_EQUAL(a != b, true);

  b.setContent(someData, sizeof(someData));
  BOOST_CHECK_EQUAL(a == b, true);
  BOOST_CHECK_EQUAL(a != b, false);

  a.setSignature(SignatureSha256WithRsa());
  BOOST_CHECK_EQUAL(a == b, false);
  BOOST_CHECK_EQUAL(a != b, true);

  b.setSignature(SignatureSha256WithRsa());
  BOOST_CHECK_EQUAL(a == b, true);
  BOOST_CHECK_EQUAL(a != b, false);
}

BOOST_AUTO_TEST_CASE(Print)
{
  Data d(Block(DATA1, sizeof(DATA1)));
  BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(d),
                    "Name: /local/ndn/prefix\n"
                    "MetaInfo: ContentType: 0, FreshnessPeriod: 10000 milliseconds\n"
                    "Content: (size: 8)\n"
                    "Signature: (type: SignatureSha256WithRsa, value_length: 128)\n");
}

BOOST_AUTO_TEST_SUITE_END() // TestData

} // namespace tests
} // namespace ndn