transmission/tests/libtransmission/torrent-metainfo-test.cc

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// This file Copyright (C) 2013-2022 Mnemosyne LLC.
// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#include <array>
#include <cerrno>
#include <cstddef> // size_t
#include <string_view>
#include <vector>
#include <libtransmission/transmission.h>
#include <libtransmission/crypto-utils.h>
#include <libtransmission/error.h>
#include <libtransmission/file.h>
#include <libtransmission/log.h>
#include <libtransmission/torrent-metainfo.h>
#include <libtransmission/torrent.h>
#include <libtransmission/tr-strbuf.h>
#include <libtransmission/utils.h>
#include "gtest/gtest.h"
#include "test-fixtures.h"
using namespace std::literals;
namespace libtransmission::test
{
using TorrentMetainfoTest = SessionTest;
TEST_F(TorrentMetainfoTest, magnetLink)
{
// background info @ http://wiki.theory.org/BitTorrent_Magnet-URI_Webseeding
auto constexpr MagnetLink =
"magnet:?"
"xt=urn:btih:14ffe5dd23188fd5cb53a1d47f1289db70abf31e"
"&dn=ubuntu_12_04_1_desktop_32_bit"
"&tr=http%3A%2F%2Ftracker.publicbt.com%2Fannounce"
"&tr=udp%3A%2F%2Ftracker.publicbt.com%3A80"
"&ws=http%3A%2F%2Ftransmissionbt.com"sv;
auto metainfo = tr_torrent_metainfo{};
EXPECT_TRUE(metainfo.parseMagnet(MagnetLink));
EXPECT_EQ(0U, metainfo.file_count()); // because it's a magnet link
EXPECT_EQ(2U, std::size(metainfo.announce_list()));
EXPECT_EQ(MagnetLink, metainfo.magnet().sv());
}
#define BEFORE_PATH \
"d10:created by25:Transmission/2.82 (14160)13:creation datei1402280218e8:encoding5:UTF-84:infod5:filesld6:lengthi2e4:pathl"
#define AFTER_PATH \
"eed6:lengthi2e4:pathl5:b.txteee4:name3:foo12:piece lengthi32768e6:pieces20:ÞÉ`âM‘‹Šs¡Å;˺¬.åÂà7:privatei0eee"
// FIXME: split these into parameterized tests?
TEST_F(TorrentMetainfoTest, bucket)
{
struct LocalTest
{
std::string_view benc;
bool expected_parse_result;
};
auto const tests = std::array<LocalTest, 9>{ {
{ BEFORE_PATH "5:a.txt" AFTER_PATH, true },
// allow empty components, but not =all= empty components, see bug #5517
{ BEFORE_PATH "0:5:a.txt" AFTER_PATH, true },
{ BEFORE_PATH "0:0:" AFTER_PATH, false },
// allow path separators in a filename (replaced with '_')
{ BEFORE_PATH "7:a/a.txt" AFTER_PATH, true },
// allow "." components (skipped)
{ BEFORE_PATH "1:.5:a.txt" AFTER_PATH, true },
{ BEFORE_PATH "5:a.txt1:." AFTER_PATH, true },
// allow ".." components (replaced with "__")
{ BEFORE_PATH "2:..5:a.txt" AFTER_PATH, true },
{ BEFORE_PATH "5:a.txt2:.." AFTER_PATH, true },
// fail on empty string
{ "", false },
} };
tr_logSetLevel(TR_LOG_OFF);
for (auto const& test : tests)
{
auto metainfo = tr_torrent_metainfo{};
EXPECT_EQ(test.expected_parse_result, metainfo.parse_benc(test.benc));
}
}
TEST_F(TorrentMetainfoTest, parseBencFuzzRegressions)
{
static auto constexpr Tests = std::array<std::string_view, 1>{
"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"sv,
};
for (auto const& test : Tests)
{
auto tm = tr_torrent_metainfo{};
tm.parse_benc(tr_base64_decode(test));
}
}
TEST_F(TorrentMetainfoTest, parseBencFuzz)
{
auto buf = std::vector<char>{};
for (size_t i = 0; i < 100000U; ++i)
{
buf.resize(tr_rand_int(1024U));
tr_rand_buffer(std::data(buf), std::size(buf));
// std::cerr << '[' << tr_base64_encode({ std::data(buf), std::size(buf) }) << ']' << std::endl;
auto tm = tr_torrent_metainfo{};
tm.parse_benc({ std::data(buf), std::size(buf) });
}
}
#if 0
TEST_F(TorrentMetainfoTest, sanitize)
{
struct LocalTest
{
std::string_view input;
std::string_view expected_output;
};
auto const tests = std::array<LocalTest, 29>{
// skipped
LocalTest{ ""sv, ""sv },
{ "."sv, ""sv },
{ ".."sv, ""sv },
{ "....."sv, ""sv },
{ " "sv, ""sv },
{ " . "sv, ""sv },
{ ". . ."sv, ""sv },
// replaced with '_'
{ "/"sv, "_"sv },
{ "////"sv, "____"sv },
{ "\\\\"sv, "__"sv },
{ "/../"sv, "_.._"sv },
{ "foo<bar:baz/boo"sv, "foo_bar_baz_boo"sv },
{ "t\0e\x01s\tt\ri\nn\fg"sv, "t_e_s_t_i_n_g"sv },
// appended with '_'
{ "con"sv, "con_"sv },
{ "cOm4"sv, "cOm4_"sv },
{ "LPt9.txt"sv, "LPt9_.txt"sv },
{ "NUL.tar.gz"sv, "NUL_.tar.gz"sv },
// trimmed
{ " foo"sv, "foo"sv },
{ "foo "sv, "foo"sv },
{ " foo "sv, "foo"sv },
{ "foo."sv, "foo"sv },
{ "foo..."sv, "foo"sv },
{ " foo... "sv, "foo"sv },
// unmodified
{ "foo"sv, "foo"sv },
{ ".foo"sv, ".foo"sv },
{ "..foo"sv, "..foo"sv },
{ "foo.bar.baz"sv, "foo.bar.baz"sv },
{ "null"sv, "null"sv },
{ "compass"sv, "compass"sv },
};
auto out = std::string{};
for (auto const& test : tests)
{
out.clear();
auto const success = tr_metainfoAppendSanitizedPathComponent(out, test.input);
EXPECT_EQ(!std::empty(out), success);
EXPECT_EQ(test.expected_output, out);
}
}
#endif
TEST_F(TorrentMetainfoTest, AndroidTorrent)
{
auto const filename = tr_pathbuf{ LIBTRANSMISSION_TEST_ASSETS_DIR, "/Android-x86 8.1 r6 iso.torrent"sv };
auto* ctor = tr_ctorNew(session_);
tr_error* error = nullptr;
EXPECT_TRUE(tr_ctorSetMetainfoFromFile(ctor, filename.c_str(), &error));
EXPECT_EQ(nullptr, error) << *error;
auto const* const metainfo = tr_ctorGetMetainfo(ctor);
EXPECT_NE(nullptr, metainfo);
EXPECT_EQ(336, metainfo->info_dict_offset());
EXPECT_EQ(26583, metainfo->info_dict_size());
EXPECT_EQ(592, metainfo->pieces_offset());
tr_ctorFree(ctor);
}
TEST_F(TorrentMetainfoTest, ctorSaveContents)
{
auto const src_filename = tr_pathbuf{ LIBTRANSMISSION_TEST_ASSETS_DIR, "/Android-x86 8.1 r6 iso.torrent"sv };
auto const tgt_filename = tr_pathbuf{ ::testing::TempDir(), "save-contents-test.torrent" };
// try saving without passing any metainfo.
auto* ctor = tr_ctorNew(session_);
tr_error* error = nullptr;
EXPECT_FALSE(tr_ctorSaveContents(ctor, tgt_filename.sv(), &error));
EXPECT_NE(nullptr, error);
if (error != nullptr)
{
EXPECT_EQ(EINVAL, error->code);
tr_error_clear(&error);
}
// now try saving _with_ metainfo
EXPECT_TRUE(tr_ctorSetMetainfoFromFile(ctor, src_filename.c_str(), &error));
EXPECT_EQ(nullptr, error) << *error;
EXPECT_TRUE(tr_ctorSaveContents(ctor, tgt_filename.sv(), &error));
EXPECT_EQ(nullptr, error) << *error;
// the saved contents should match the source file's contents
auto src_contents = std::vector<char>{};
EXPECT_TRUE(tr_file_read(src_filename.sv(), src_contents, &error));
auto tgt_contents = std::vector<char>{};
EXPECT_TRUE(tr_file_read(tgt_filename.sv(), tgt_contents, &error));
EXPECT_EQ(src_contents, tgt_contents);
// cleanup
EXPECT_TRUE(tr_sys_path_remove(tgt_filename, &error));
EXPECT_EQ(nullptr, error) << *error;
tr_error_clear(&error);
tr_ctorFree(ctor);
}
TEST_F(TorrentMetainfoTest, magnetInfoHash)
{
// compatibility with magnet torrents created by Transmission <= 3.0
auto const src_filename = tr_pathbuf{ LIBTRANSMISSION_TEST_ASSETS_DIR, "/gimp-2.10.32-1-arm64.dmg.torrent"sv };
auto tm = tr_torrent_metainfo{};
EXPECT_TRUE(tm.parse_torrent_file(src_filename));
}
TEST_F(TorrentMetainfoTest, HoffmanStyleWebseeds)
{
auto const src_filename = tr_pathbuf{ LIBTRANSMISSION_TEST_ASSETS_DIR, "/debian-11.2.0-amd64-DVD-1.iso.torrent"sv };
auto tm = tr_torrent_metainfo{};
EXPECT_TRUE(tm.parse_torrent_file(src_filename));
EXPECT_EQ(size_t{ 2 }, tm.webseed_count());
EXPECT_EQ(
"https://cdimage.debian.org/cdimage/release/11.2.0//srv/cdbuilder.debian.org/dst/deb-cd/weekly-builds/amd64/iso-dvd/debian-11.2.0-amd64-DVD-1.iso"sv,
tm.webseed(0));
EXPECT_EQ(
"https://cdimage.debian.org/cdimage/archive/11.2.0//srv/cdbuilder.debian.org/dst/deb-cd/weekly-builds/amd64/iso-dvd/debian-11.2.0-amd64-DVD-1.iso"sv,
tm.webseed(1));
}
TEST_F(TorrentMetainfoTest, GetRightStyleWebseedList)
{
auto const src_filename = tr_pathbuf{ LIBTRANSMISSION_TEST_ASSETS_DIR, "/webseed-getright-list.torrent"sv };
auto tm = tr_torrent_metainfo{};
EXPECT_TRUE(tm.parse_torrent_file(src_filename));
EXPECT_EQ(size_t{ 2 }, tm.webseed_count());
EXPECT_EQ("http://www.webseed-one.com/"sv, tm.webseed(0));
EXPECT_EQ("http://webseed-two.com/"sv, tm.webseed(1));
}
TEST_F(TorrentMetainfoTest, GetRightStyleWebseedString)
{
auto const src_filename = tr_pathbuf{ LIBTRANSMISSION_TEST_ASSETS_DIR, "/webseed-getright-string.torrent"sv };
auto tm = tr_torrent_metainfo{};
EXPECT_TRUE(tm.parse_torrent_file(src_filename));
EXPECT_EQ(size_t{ 1 }, tm.webseed_count());
EXPECT_EQ("http://www.webseed-one.com/"sv, tm.webseed(0));
}
// Test for https://github.com/transmission/transmission/issues/3591
TEST_F(TorrentMetainfoTest, parseBencOOBWrite)
{
auto tm = tr_torrent_metainfo{};
EXPECT_FALSE(tm.parse_benc(tr_base64_decode("ZGg0OmluZm9kNjpwaWVjZXMzOkFpzQ==")));
}
} // namespace libtransmission::test