/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2013-2020 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 "ndn-cxx/security/certificate.hpp"

#include "tests/boost-test.hpp"
#include "tests/unit/unit-test-time-fixture.hpp"

#include <boost/lexical_cast.hpp>

namespace ndn {
namespace security {
inline namespace v2 {
namespace tests {

using namespace ndn::tests;

BOOST_AUTO_TEST_SUITE(Security)
BOOST_FIXTURE_TEST_SUITE(TestCertificate, UnitTestTimeFixture)

const uint8_t PUBLIC_KEY[] = {
  0x30, 0x81, 0x9d, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01,
  0x01, 0x05, 0x00, 0x03, 0x81, 0x8b, 0x00, 0x30, 0x81, 0x87, 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
};

const uint8_t SIG_INFO[] = {
  0x16, 0x55, 0x1B, 0x01, 0x01, 0x1C, 0x26, 0x07, 0x24, 0x08, 0x03, 0x6E, 0x64, 0x6E, 0x08, 0x05,
  0x73, 0x69, 0x74, 0x65, 0x31, 0x08, 0x11, 0x6B, 0x73, 0x6B, 0x2D, 0x32, 0x35, 0x31, 0x36, 0x34,
  0x32, 0x35, 0x33, 0x37, 0x37, 0x30, 0x39, 0x34, 0x08, 0x03, 0x4B, 0x45, 0x59, 0xFD, 0x00, 0xFD,
  0x26, 0xFD, 0x00, 0xFE, 0x0F, 0x32, 0x30, 0x31, 0x35, 0x30, 0x38, 0x31, 0x34, 0x54, 0x32, 0x32,
  0x33, 0x37, 0x33, 0x39, 0xFD, 0x00, 0xFF, 0x0F, 0x32, 0x30, 0x31, 0x35, 0x30, 0x38, 0x31, 0x38,
  0x54, 0x32, 0x32, 0x33, 0x37, 0x33, 0x38
};

const uint8_t SIG_VALUE[] = {
  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,
};

const uint8_t CERT[] = {
  0x06, 0xFD, 0x01, 0xBB, // Data
    0x07, 0x33, // Name /ndn/site1/KEY/ksk-1416425377094/0123/%FD%00%00%01I%C9%8B
      0x08, 0x03, 0x6E, 0x64, 0x6E,
      0x08, 0x05, 0x73, 0x69, 0x74, 0x65, 0x31,
      0x08, 0x03, 0x4B, 0x45, 0x59,
      0x08, 0x11,
        0x6B, 0x73, 0x6B, 0x2D, 0x31, 0x34, 0x31, 0x36, 0x34, 0x32, 0x35, 0x33, 0x37, 0x37, 0x30, 0x39,
        0x34,
      0x08, 0x04, 0x30, 0x31, 0x32, 0x33,
      0x08, 0x07, 0xFD, 0x00, 0x00, 0x01, 0x49, 0xC9, 0x8B,
    0x14, 0x09, // MetaInfo
      0x18, 0x01, 0x02, // ContentType = Key
      0x19, 0x04, 0x00, 0x36, 0xEE, 0x80, // FreshnessPeriod = 3600000 ms
    0x15, 0xA0, // Content
      0x30, 0x81, 0x9D, 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01,
      0x05, 0x00, 0x03, 0x81, 0x8B, 0x00, 0x30, 0x81, 0x87, 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,
    0x16, 0x55, // SignatureInfo
      0x1B, 0x01, 0x01, // SignatureType
      0x1C, 0x26, // KeyLocator: /ndn/site1/KEY/ksk-2516425377094
        0x07, 0x24,
          0x08, 0x03, 0x6E, 0x64, 0x6E,
          0x08, 0x05, 0x73, 0x69, 0x74, 0x65, 0x31,
          0x08, 0x03, 0x4B, 0x45, 0x59,
          0x08, 0x11,
            0x6B, 0x73, 0x6B, 0x2D, 0x32, 0x35, 0x31, 0x36, 0x34, 0x32, 0x35, 0x33, 0x37, 0x37, 0x30, 0x39,
            0x34,
      0xFD, 0x00, 0xFD, 0x26, // ValidityPeriod: (20150814T223739, 20150818T223738)
        0xFD, 0x00, 0xFE, 0x0F,
          0x32, 0x30, 0x31, 0x35, 0x30, 0x38, 0x31, 0x34, 0x54, 0x32, 0x32, 0x33, 0x37, 0x33, 0x39,
        0xFD, 0x00, 0xFF, 0x0F,
          0x32, 0x30, 0x31, 0x35, 0x30, 0x38, 0x31, 0x38, 0x54, 0x32, 0x32, 0x33, 0x37, 0x33, 0x38,
    0x17, 0x80, // SignatureValue
      0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
      0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
      0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
      0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
      0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
      0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
      0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
      0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
};

static void
generateFakeSignature(Data& data)
{
  SignatureInfo signatureInfo(Block(SIG_INFO, sizeof(SIG_INFO)));
  signatureInfo.setKeyLocator(KeyLocator(Name("/ndn/site1/KEY/ksk-2516425377094")));
  signatureInfo.setValidityPeriod(ValidityPeriod(time::fromIsoString("20141111T050000"),
                                                 time::fromIsoString("20141111T060000")));

  data.setSignatureInfo(signatureInfo);
  data.setSignatureValue(make_shared<Buffer>(SIG_VALUE, sizeof(SIG_VALUE)));
}

BOOST_AUTO_TEST_CASE(Construction)
{
  Block block(CERT, sizeof(CERT));
  Certificate certificate(block);

  BOOST_CHECK_EQUAL(certificate.getName(), "/ndn/site1/KEY/ksk-1416425377094/0123/%FD%00%00%01I%C9%8B");
  BOOST_CHECK_EQUAL(certificate.getKeyName(), "/ndn/site1/KEY/ksk-1416425377094");
  BOOST_CHECK_EQUAL(certificate.getIdentity(), "/ndn/site1");
  BOOST_CHECK_EQUAL(certificate.getIssuerId(), name::Component("0123"));
  BOOST_CHECK_EQUAL(certificate.getKeyId(), name::Component("ksk-1416425377094"));
  BOOST_REQUIRE_EQUAL(certificate.getKeyLocator().has_value(), true);
  BOOST_CHECK_EQUAL(certificate.getKeyLocator()->getName(), "/ndn/site1/KEY/ksk-2516425377094");
  BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(certificate.getValidityPeriod()),
                    "(20150814T223739, 20150818T223738)");

  BOOST_CHECK_THROW(certificate.getExtension(12345), ndn::Data::Error);
  BOOST_CHECK_NO_THROW(certificate.getPublicKey());

  Data data(block);
  Certificate certificate2(std::move(data));
  BOOST_CHECK_EQUAL(certificate, certificate2);
}

BOOST_AUTO_TEST_CASE(Setters)
{
  Certificate certificate;
  certificate.setName("/ndn/site1/KEY/ksk-1416425377094/0123/%FD%00%00%01I%C9%8B");
  certificate.setFreshnessPeriod(1_h);
  certificate.setContent(PUBLIC_KEY, sizeof(PUBLIC_KEY));
  generateFakeSignature(certificate);

  BOOST_CHECK_EQUAL(certificate.getName(), "/ndn/site1/KEY/ksk-1416425377094/0123/%FD%00%00%01I%C9%8B");
  BOOST_CHECK_EQUAL(certificate.getKeyName(), "/ndn/site1/KEY/ksk-1416425377094");
  BOOST_CHECK_EQUAL(certificate.getIdentity(), "/ndn/site1");
  BOOST_CHECK_EQUAL(certificate.getIssuerId(), name::Component("0123"));
  BOOST_CHECK_EQUAL(certificate.getKeyId(), name::Component("ksk-1416425377094"));
  BOOST_REQUIRE_EQUAL(certificate.getKeyLocator().has_value(), true);
  BOOST_CHECK_EQUAL(certificate.getKeyLocator()->getName(), "/ndn/site1/KEY/ksk-2516425377094");
  BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(certificate.getValidityPeriod()),
                    "(20141111T050000, 20141111T060000)");

  BOOST_CHECK_THROW(certificate.getExtension(12345), ndn::Data::Error);
  BOOST_CHECK_NO_THROW(certificate.getPublicKey());
}

BOOST_AUTO_TEST_CASE(ValidityPeriodChecking)
{
  Certificate certificate;
  certificate.setName("/ndn/site1/KEY/ksk-1416425377094/0123/%FD%00%00%01I%C9%8B");
  certificate.setFreshnessPeriod(1_h);
  certificate.setContent(PUBLIC_KEY, sizeof(PUBLIC_KEY));
  generateFakeSignature(certificate);

  BOOST_CHECK_EQUAL(certificate.isValid(), true);
  BOOST_CHECK_EQUAL(certificate.isValid(time::fromIsoString("20141111T045959")), false);
  BOOST_CHECK_EQUAL(certificate.isValid(time::fromIsoString("20141111T060001")), false);
}

// This fixture prepares a well-formed certificate. A test case then modifies one of the
// fields, and verifies the Certificate class correctly identifies the certificate as
// malformed.
class InvalidCertFixture
{
public:
  InvalidCertFixture()
  {
    Certificate certBase(Block(CERT, sizeof(CERT)));
    BOOST_CHECK_NO_THROW((Certificate(certBase)));

    m_certBase = Data(certBase);
    generateFakeSignature(m_certBase);

    BOOST_CHECK_NO_THROW((Certificate(m_certBase)));
  }

public:
  Data m_certBase;
};

BOOST_FIXTURE_TEST_CASE(InvalidName, InvalidCertFixture)
{
  Data data(m_certBase);
  data.setName("/ndn/site1/ksk-1416425377094/0123/%FD%00%00%01I%C9%8B");
  generateFakeSignature(data);

  BOOST_CHECK_THROW((Certificate(data)), Certificate::Error);
  BOOST_CHECK_THROW((Certificate(std::move(data))), Certificate::Error);
}

BOOST_FIXTURE_TEST_CASE(InvalidType, InvalidCertFixture)
{
  Data data(m_certBase);
  data.setContentType(tlv::ContentType_Blob);
  generateFakeSignature(data);

  BOOST_CHECK_THROW((Certificate(data)), Certificate::Error);
  BOOST_CHECK_THROW((Certificate(std::move(data))), Certificate::Error);
}

BOOST_FIXTURE_TEST_CASE(EmptyContent, InvalidCertFixture)
{
  Data data(m_certBase);
  data.setContent(nullptr, 0);
  generateFakeSignature(data);

  BOOST_CHECK_THROW((Certificate(data)), Certificate::Error);
  BOOST_CHECK_THROW((Certificate(std::move(data))), Certificate::Error);

  Certificate cert(m_certBase);
  cert.setContent(nullptr, 0);
  generateFakeSignature(cert);
  BOOST_CHECK_THROW(cert.getPublicKey(), Certificate::Error);
}

BOOST_AUTO_TEST_CASE(PrintCertificateInfo)
{
  const std::string expectedCertificateInfo = std::string(R"INFO(
Certificate name:
  /ndn/site1/KEY/ksk-1416425377094/0123/%FD%00%00%01I%C9%8B
Validity:
  NotBefore: 20150814T223739
  NotAfter: 20150818T223738
Public key bits:
  MIGdMA0GCSqGSIb3DQEBAQUAA4GLADCBhwKBgQCeBj5HhbI0N6qFR6wDJIO1nKgF
  OiQe64kBu+mbssMirGjj8GwCzmimxNCnBpCcqhsIHYtDmjNnRG0hoxuImpdeWcQV
  C9ksvVEHYYKtwbjXv5vPfSTCY/OXF+v+YiW6W02Kwnq9Q4qPuPLxxWow01CMyJrf
  7+0153pi6nZ8uwgmxwIBEQ==
Signature Information:
  Signature Type: SignatureSha256WithRsa
  Key Locator: Name=/ndn/site1/KEY/ksk-2516425377094
)INFO").substr(1);

  Certificate certificate(Block(CERT, sizeof(CERT)));
  BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(certificate), expectedCertificateInfo);

  // @todo Check output formats of other certificates
}

BOOST_AUTO_TEST_SUITE_END() // TestCertificate
BOOST_AUTO_TEST_SUITE_END() // Security

} // namespace tests
} // inline namespace v2
} // namespace security
} // namespace ndn