forked from premiere/premiere-libtorrent
417 lines
8.9 KiB
C++
417 lines
8.9 KiB
C++
/*
|
|
|
|
Copyright (c) 2015, Arvid Norberg
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the distribution.
|
|
* Neither the name of the author nor the names of its
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
#include <string>
|
|
#include <cstdint>
|
|
#include <random>
|
|
#include <cinttypes> // for PRId64 et.al.
|
|
|
|
#include "libtorrent/bdecode.hpp"
|
|
#include "libtorrent/torrent_info.hpp"
|
|
#include "libtorrent/error_code.hpp"
|
|
|
|
using libtorrent::bdecode_node;
|
|
using std::mt19937;
|
|
using std::uniform_int_distribution;
|
|
|
|
char const* invalid_utf8_sequences[] =
|
|
{
|
|
"\x80",
|
|
"\xbf",
|
|
"\xff",
|
|
"\xfe",
|
|
"\xff\xff\xfe\xfe",
|
|
"\xc0\xaf",
|
|
"\xe0\x80\xaf",
|
|
"\xf0\x80\x80\xaf",
|
|
"\xf8\x80\x80\x80\xaf ",
|
|
"\xfc\x80\x80\x80\x80\xaf",
|
|
"\xc1\xbf",
|
|
"\xe0\x9f\xbf",
|
|
"\xf0\x8f\xbf\xbf",
|
|
"\xf8\x87\xbf\xbf\xbf",
|
|
"\xfc\x83\xbf\xbf\xbf\xbf",
|
|
"\xc0\x80",
|
|
"\xe0\x80\x80",
|
|
"\xf0\x80\x80\x80",
|
|
"\xf8\x80\x80\x80\x80",
|
|
"\xfc\x80\x80\x80\x80\x80",
|
|
"\xed\xa0\x80",
|
|
"\xed\xad\xbf",
|
|
"\xed\xae\x80",
|
|
"\xed\xaf\xbf",
|
|
"\xed\xb0\x80",
|
|
"\xed\xbe\x80",
|
|
"\xed\xbf\xbf",
|
|
"\xed\xa0\x80\xed\xb0\x80",
|
|
"\xed\xa0\x80\xed\xbf\xbf",
|
|
"\xed\xad\xbf\xed\xb0\x80",
|
|
"\xed\xad\xbf\xed\xbf\xbf",
|
|
"\xed\xae\x80\xed\xb0\x80",
|
|
"\xed\xae\x80\xed\xbf\xbf",
|
|
"\xed\xaf\xbf\xed\xb0\x80",
|
|
"\xed\xaf\xbf\xed\xbf\xbf",
|
|
};
|
|
|
|
std::int64_t g_seed;
|
|
|
|
void print_ascii_number(std::string& output, std::int64_t val)
|
|
{
|
|
const bool overflow = g_seed == 1;
|
|
const bool underflow = g_seed == 2;
|
|
const bool negative = g_seed == 3;
|
|
const bool double_negative = g_seed == 4;
|
|
const bool zero = g_seed == 5;
|
|
g_seed -= 5;
|
|
|
|
char const* numbers = "0123456789";
|
|
if (zero)
|
|
{
|
|
output += '0';
|
|
}
|
|
else if (underflow)
|
|
{
|
|
output += '-';
|
|
for (int i = 0; i < 100; ++i) output += numbers[rand() % 10];
|
|
return;
|
|
}
|
|
else if (overflow)
|
|
{
|
|
for (int i = 0; i < 100; ++i) output += numbers[rand() % 10];
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
if (negative) output += '-';
|
|
else if (double_negative) output += "--";
|
|
char buf[50];
|
|
std::snprintf(buf, sizeof(buf), "%" PRId64 "", val);
|
|
output += buf;
|
|
}
|
|
}
|
|
|
|
void print_string(std::string& output, std::string str)
|
|
{
|
|
const bool empty_string = g_seed == 1;
|
|
g_seed -= 1;
|
|
if (empty_string)
|
|
{
|
|
print_ascii_number(output, 0);
|
|
output += ':';
|
|
return;
|
|
}
|
|
|
|
const bool random_string = g_seed > 0 && g_seed <= 1000;
|
|
const int str_seed = int(g_seed) - 1;
|
|
g_seed -= 1000;
|
|
if (random_string)
|
|
{
|
|
static mt19937 random_engine(str_seed);
|
|
uniform_int_distribution<> d(0, 255);
|
|
for (int i = 0; i < int(str.size()); ++i)
|
|
str[i] = std::uint8_t(d(random_engine));
|
|
|
|
print_ascii_number(output, str.size());
|
|
output += ':';
|
|
output += str;
|
|
return;
|
|
}
|
|
|
|
const int num_sequences = (sizeof(invalid_utf8_sequences)/sizeof(char const*));
|
|
const bool invalid_utf8 = g_seed <= num_sequences && g_seed > 0;
|
|
|
|
if (invalid_utf8)
|
|
str += invalid_utf8_sequences[g_seed-1];
|
|
|
|
g_seed -= num_sequences;
|
|
|
|
print_ascii_number(output, str.size());
|
|
output += ':';
|
|
output += str;
|
|
}
|
|
|
|
void print_terminate(std::string& output)
|
|
{
|
|
const bool unterminated = g_seed == 1;
|
|
g_seed -= 1;
|
|
if (!unterminated) output += 'e';
|
|
}
|
|
|
|
void print_int(std::string& output, std::int64_t value)
|
|
{
|
|
const bool double_int = g_seed == 1;
|
|
g_seed -= 1;
|
|
if (double_int) output += 'i';
|
|
output += 'i';
|
|
print_ascii_number(output, value);
|
|
print_terminate(output);
|
|
}
|
|
|
|
void print_dict(std::string& output)
|
|
{
|
|
const bool double_dict = g_seed == 1;
|
|
g_seed -= 1;
|
|
if (double_dict) output += 'd';
|
|
output += 'd';
|
|
}
|
|
|
|
void print_list(std::string& output)
|
|
{
|
|
const bool double_list = g_seed == 1;
|
|
g_seed -= 1;
|
|
if (double_list) output += 'l';
|
|
output += 'l';
|
|
}
|
|
|
|
void render_arbitrary_item(std::string& out)
|
|
{
|
|
if (g_seed <= 0) return;
|
|
|
|
std::string option;
|
|
print_int(option, 1337);
|
|
if (g_seed <= 0)
|
|
{
|
|
out += option;
|
|
return;
|
|
}
|
|
|
|
option.clear();
|
|
print_string(option, "abcdefgh");
|
|
if (g_seed <= 0)
|
|
{
|
|
out += option;
|
|
return;
|
|
}
|
|
|
|
option.clear();
|
|
print_dict(option);
|
|
print_string(option, "abcdefgh");
|
|
print_int(option, 1337);
|
|
print_terminate(option);
|
|
if (g_seed <= 0)
|
|
{
|
|
out += option;
|
|
return;
|
|
}
|
|
|
|
option.clear();
|
|
print_list(option);
|
|
print_string(option, "abcdefgh");
|
|
print_terminate(option);
|
|
if (g_seed <= 0)
|
|
{
|
|
out += option;
|
|
return;
|
|
}
|
|
}
|
|
|
|
void render_variant(std::string& out, bdecode_node const& e)
|
|
{
|
|
switch (e.type())
|
|
{
|
|
case bdecode_node::dict_t:
|
|
print_dict(out);
|
|
for (int i = 0; i < e.dict_size(); ++i)
|
|
{
|
|
std::pair<std::string, bdecode_node> item = e.dict_at(i);
|
|
const bool duplicate = g_seed == 1;
|
|
const bool skipped = g_seed == 2;
|
|
g_seed -= 2;
|
|
if (duplicate)
|
|
{
|
|
print_string(out, item.first);
|
|
render_variant(out, item.second);
|
|
}
|
|
if (!skipped)
|
|
{
|
|
print_string(out, item.first);
|
|
render_variant(out, item.second);
|
|
}
|
|
|
|
render_arbitrary_item(out);
|
|
}
|
|
print_terminate(out);
|
|
break;
|
|
case bdecode_node::list_t:
|
|
print_list(out);
|
|
for (int i = 0; i < e.list_size(); ++i)
|
|
{
|
|
const bool duplicate = g_seed == 1;
|
|
const bool skipped = g_seed == 2;
|
|
g_seed -= 2;
|
|
if (duplicate) render_variant(out, e.list_at(i));
|
|
|
|
render_arbitrary_item(out);
|
|
|
|
if (!skipped) render_variant(out, e.list_at(i));
|
|
}
|
|
print_terminate(out);
|
|
break;
|
|
case bdecode_node::int_t:
|
|
print_int(out, e.int_value());
|
|
break;
|
|
case bdecode_node::string_t:
|
|
print_string(out, e.string_value());
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
|
|
int load_file(std::string const& filename, std::vector<char>& v
|
|
, libtorrent::error_code& ec, int limit = 8000000)
|
|
{
|
|
ec.clear();
|
|
FILE* f = fopen(filename.c_str(), "rb");
|
|
if (f == nullptr)
|
|
{
|
|
ec.assign(errno, boost::system::system_category());
|
|
return -1;
|
|
}
|
|
|
|
int r = fseek(f, 0, SEEK_END);
|
|
if (r != 0)
|
|
{
|
|
ec.assign(errno, boost::system::system_category());
|
|
fclose(f);
|
|
return -1;
|
|
}
|
|
long s = ftell(f);
|
|
if (s < 0)
|
|
{
|
|
ec.assign(errno, boost::system::system_category());
|
|
fclose(f);
|
|
return -1;
|
|
}
|
|
|
|
if (s > limit)
|
|
{
|
|
fclose(f);
|
|
return -2;
|
|
}
|
|
|
|
r = fseek(f, 0, SEEK_SET);
|
|
if (r != 0)
|
|
{
|
|
ec.assign(errno, boost::system::system_category());
|
|
fclose(f);
|
|
return -1;
|
|
}
|
|
|
|
v.resize(s);
|
|
if (s == 0)
|
|
{
|
|
fclose(f);
|
|
return 0;
|
|
}
|
|
|
|
r = int(fread(&v[0], 1, v.size(), f));
|
|
if (r < 0)
|
|
{
|
|
ec.assign(errno, boost::system::system_category());
|
|
fclose(f);
|
|
return -1;
|
|
}
|
|
|
|
fclose(f);
|
|
|
|
if (r != s) return -3;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char const* argv[])
|
|
{
|
|
std::vector<char> buf;
|
|
libtorrent::error_code ec;
|
|
|
|
if (argc < 2)
|
|
{
|
|
std::fprintf(stderr, "usage: fuzz_torrent torrent-file [torrent-file ...]\n");
|
|
return 1;
|
|
}
|
|
|
|
--argc;
|
|
++argv;
|
|
for (;argc > 0; --argc, ++argv)
|
|
{
|
|
int ret = load_file(*argv, buf, ec);
|
|
if (ret < 0)
|
|
{
|
|
std::fprintf(stderr, "ERROR loading file: %s\n%s\n"
|
|
, *argv, ec.message().c_str());
|
|
continue;
|
|
}
|
|
|
|
bdecode_node e;
|
|
if (buf.empty() || bdecode(&buf[0], &buf[0] + buf.size(), e, ec) != 0)
|
|
{
|
|
std::fprintf(stderr, "ERROR parsing file: %s\n%s\n"
|
|
, *argv, ec.message().c_str());
|
|
continue;
|
|
}
|
|
|
|
std::string test_buffer;
|
|
int i = 0;
|
|
for (i = 0; i < 10000000; ++i)
|
|
{
|
|
g_seed = i;
|
|
test_buffer.clear();
|
|
render_variant(test_buffer, e);
|
|
|
|
libtorrent::error_code ec;
|
|
libtorrent::torrent_info t(test_buffer.c_str(), int(test_buffer.size()), ec);
|
|
|
|
// TODO: add option to save to file unconditionally (to test other clients)
|
|
/*
|
|
{
|
|
std::fprintf(stderr, "saving %d\n", i);
|
|
char filename[100];
|
|
std::snprintf(filename, sizeof(filename), "torrents/fuzz-%d.torrent", i);
|
|
FILE* f = fopen(filename, "wb+");
|
|
if (f == 0)
|
|
{
|
|
std::fprintf(stderr, "ERROR saving file: (%d) %s\n", errno, strerror(errno));
|
|
return 1;
|
|
}
|
|
fwrite(test_buffer.c_str(), test_buffer.size(), 1, f);
|
|
fclose(f);
|
|
}
|
|
*/
|
|
if (g_seed > 0) break;
|
|
}
|
|
std::fprintf(stderr, "tested %d variants of %s\n", i, *argv);
|
|
}
|
|
return 0;
|
|
}
|
|
|