//    OpenVPN -- An application to securely tunnel IP networks
//               over a single port, with support for SSL/TLS-based
//               session authentication and key exchange,
//               packet encryption, packet authentication, and
//               packet compression.
//
//    Copyright (C) 2012- OpenVPN Inc.
//
//    SPDX-License-Identifier: MPL-2.0 OR AGPL-3.0-only WITH openvpn3-openssl-exception
//
//

#include <string>

#include "test_common.hpp"
#include "openvpn/ssl/peer_fingerprint.hpp"

using namespace openvpn;

namespace unittests {

std::vector<uint8_t> test_fingerprint = {
    // clang-format off
    0x44, 0xF5, 0xA6, 0x4D, 0x4A, 0xCB, 0x65, 0xE1, 0x8A, 0x9F, 0x55, 0x89, 0x7F, 0x77, 0xA0, 0x79,
    0xAA, 0xFB, 0xCC, 0xA1, 0x37, 0x2F, 0xD8, 0xB3, 0x47, 0xAA, 0x9D, 0xE3, 0xD0, 0x76, 0xB1, 0x44
    // clang-format on
};

TEST(PeerFingerprint, parse_config)
{
    OptionList cfg;
    cfg.parse_from_config(
        "peer-fingerprint 01:F5:A6:4D:4A:CB:65:E1:8A:9F:55:89:7F:77:A0:79:AA:FB:CC:A1:37:2F:D8:B3:47:AA:9D:E3:D0:76:B1:44\n"
        "<peer-fingerprint>\n"
        "  \n"
        "02:F5:A6:4D:4A:CB:65:E1:8A:9F:55:89:7F:77:A0:79:AA:FB:CC:A1:37:2F:D8:B3:47:AA:9D:E3:D0:76:B1:44\n"
        "# comment\n"
        "03:F5:A6:4D:4A:CB:65:E1:8A:9F:55:89:7F:77:A0:79:AA:FB:CC:A1:37:2F:D8:B3:47:AA:9D:E3:D0:76:B1:44 \n"
        "  ; comment\n"
        "04:F5:A6:4D:4A:CB:65:E1:8A:9F:55:89:7F:77:A0:79:AA:FB:CC:A1:37:2F:D8:B3:47:AA:9D:E3:D0:76:B1:44  \n"
        "</peer-fingerprint>\n"
        "peer-fingerprint 05:F5:A6:4D:4A:CB:65:E1:8A:9F:55:89:7F:77:A0:79:AA:FB:CC:A1:37:2F:D8:B3:47:AA:9D:E3:D0:76:B1:44 \n",
        nullptr);
    cfg.update_map();

    struct TestPeerFingerprints : public PeerFingerprints
    {
        TestPeerFingerprints(const OptionList &opt, std::size_t fp_size)
            : PeerFingerprints(opt, fp_size)
        {
        }
        std::size_t size()
        {
            return fingerprints_.size();
        }
    };

    TestPeerFingerprints fps(cfg, test_fingerprint.size());
    ASSERT_EQ(fps.size(), 5u);

    for (std::size_t i = 1; i <= fps.size(); ++i)
    {
        auto fingerprint = test_fingerprint;
        fingerprint[0] = static_cast<unsigned char>(i);
        PeerFingerprint fp(fingerprint);
        ASSERT_EQ(fps.match(fp), true);
    }
}


TEST(PeerFingerprint, malformed)
{
    OptionList cfg;
    cfg.parse_from_config(
        "peer-fingerprint 01:F5:A6:4D:4A:CB:65:E1:8A:9F:55:89:7F:77:A0:79:AA:FB:CC:A1:37:2F:D8:B3:47:AA:9D:E3:D0:76:B1\n",
        nullptr);
    cfg.update_map();
    EXPECT_THROW(PeerFingerprints(cfg, test_fingerprint.size()), option_error);

    cfg.clear();
    cfg.parse_from_config(
        "peer-fingerprint 01:F5:A6:4D:4A:CB:65:E1:8A:9F:55:89:7F:77:A0:79:AA:FB:CC:A1:37:2F:D8:B3:47:AA:9D:E3:D0:76:B1:55:FF\n",
        nullptr);
    cfg.update_map();
    EXPECT_THROW(PeerFingerprints(cfg, test_fingerprint.size()), option_error);

    cfg.clear();
    cfg.parse_from_config(
        "peer-fingerprint 101:F5:A6:4D:4A:CB:65:E1:8A:9F:55:89:7F:77:A0:79:AA:FB:CC:A1:37:2F:D8:B3:47:AA:9D:E3:D0:76:B1:55\n",
        nullptr);
    cfg.update_map();
    EXPECT_THROW(PeerFingerprints(cfg, test_fingerprint.size()), option_error);

    cfg.clear();
    cfg.parse_from_config(
        "peer-fingerprint 11:F5:A6:4D:4A:1CB:65:E1:8A:9F:55:89:7F:77:A0:79:AA:FB:CC:A1:37:2F:D8:B3:47:AA:9D:E3:D0:76:B1:55\n",
        nullptr);
    cfg.update_map();
    EXPECT_THROW(PeerFingerprints(cfg, test_fingerprint.size()), option_error);

    cfg.clear();
    cfg.parse_from_config(
        "peer-fingerprint 11/F5/A6/4D/4A/CB/65/E1/8A/9F/55/89/7F/77/A0/79/AA/FB/CC/A1/37/2F/D8/B3/47/AA/9D/E3/D0/76/B1/55\n",
        nullptr);
    cfg.update_map();
    EXPECT_THROW(PeerFingerprints(cfg, test_fingerprint.size()), option_error);

    cfg.clear();
    cfg.parse_from_config(
        "<peer-fingerprint>\n"
        " 02:F5:A6:4D:4A:CB:65:E1:8A:9F:55:89:7F:77:A0:79:AA:FB:CC:A1:37:2F:D8:B3:47:AA:9D:E3:D0:76:B1:44\n"
        "</peer-fingerprint>\n",
        nullptr);
    cfg.update_map();
    EXPECT_THROW(PeerFingerprints(cfg, test_fingerprint.size()), option_error);
}


TEST(PeerFingerprint, stringify)
{
    std::string hex_fp("01:f5:a6:4d:4a:cb:65:e1:8a:9f:55:89:7f:77:a0:79:aa:fb:cc:a1:37:2f:d8:b3:47:aa:9d:e3:d0:76:b1:55");
    PeerFingerprint fp(hex_fp, test_fingerprint.size());
    ASSERT_EQ(fp.str(), hex_fp);
}


TEST(PeerFingerprint, match_empty)
{
    PeerFingerprint fp(test_fingerprint);
    PeerFingerprints fps;
    ASSERT_FALSE(fps);
    ASSERT_EQ(fps.match(fp), false);
}


TEST(PeerFingerprint, match)
{
    OptionList cfg;
    cfg.parse_from_config(
        "<peer-fingerprint>\n"
        "A4:E5:A7:1D:AA:E3:65:E1:3A:6E:45:89:80:66:A0:79:BB:E3:EC:41:34:2F:08:83:97:AA:91:33:DF:11:31:AA\n"
        "44:F5:A6:4D:4A:CB:65:E1:8A:9F:55:89:7F:77:A0:79:AA:FB:CC:A1:37:2F:D8:B3:47:AA:9D:E3:D0:76:B1:44\n"
        "</peer-fingerprint>\n",
        nullptr);
    cfg.update_map();

    PeerFingerprint fp(test_fingerprint);
    PeerFingerprints fps(cfg, test_fingerprint.size());
    ASSERT_EQ(fps.match(fp), true);
}

TEST(PeerFingerprint, no_match)
{
    OptionList cfg;
    cfg.parse_from_config(
        "peer-fingerprint A4:E5:A7:1D:AA:E3:65:E1:3A:6E:45:89:80:66:A0:79:BB:E3:EC:41:34:2F:08:83:97:AA:91:33:DF:11:31:AA\n",
        nullptr);
    cfg.update_map();

    PeerFingerprint fp(test_fingerprint);
    PeerFingerprints fps(cfg, test_fingerprint.size());
    ASSERT_EQ(fps.match(fp), false);
}


} // namespace unittests
