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// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <fuzzer/FuzzedDataProvider.h>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <memory>
#include <vector>
#include "lzo1.h"
#include "lzo1a.h"
#include "lzo1b.h"
#include "lzo1c.h"
#include "lzo1f.h"
#include "lzo1x.h"
#include "lzo1y.h"
#include "lzo1z.h"
#include "lzo2a.h"
#include "lzoconf.h"
namespace {
struct LzoAlgorithm {
enum class Category { LZO1, LZO2 };
enum class Type {
LZO1,
LZO1A,
LZO1B,
LZO1C,
LZO1F,
LZO1X,
LZO1Y,
LZO1Z,
LZO2A
};
constexpr LzoAlgorithm(Category category, Type type, int compression_level,
int memory_level, lzo_compress_t compress_fn,
lzo_decompress_t decompress_fn,
size_t working_memory_size)
: category(category),
type(type),
compression_level(compression_level),
memory_level(memory_level),
compress_fn(compress_fn),
decompress_fn(decompress_fn),
working_memory_size(working_memory_size) {}
size_t GetMaxCompressedSize(size_t size) const {
// Formula taken from the LZO FAQ.
switch (category) {
case Category::LZO1:
return size + (size / 16) + 64 + 3;
case Category::LZO2:
return size + (size / 8) + 128 + 3;
}
}
Category category;
Type type;
int compression_level;
int memory_level;
lzo_compress_t compress_fn;
lzo_decompress_t decompress_fn;
size_t working_memory_size;
};
static const std::vector<std::vector<LzoAlgorithm>>& GetLzoAlgorithms() {
static auto* algorithms = new std::vector<std::vector<LzoAlgorithm>>{
{
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1,
0, 0, lzo1_compress, lzo1_decompress, LZO1_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1,
99, 0, lzo1_99_compress, lzo1_decompress,
LZO1_99_MEM_COMPRESS),
},
{
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1A,
0, 0, lzo1a_compress, lzo1a_decompress,
LZO1A_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1A,
99, 0, lzo1a_99_compress, lzo1a_decompress,
LZO1A_99_MEM_COMPRESS),
},
{
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1B,
1, 0, lzo1b_1_compress, lzo1b_decompress,
LZO1B_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1B,
2, 0, lzo1b_2_compress, lzo1b_decompress,
LZO1B_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1B,
3, 0, lzo1b_3_compress, lzo1b_decompress,
LZO1B_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1B,
4, 0, lzo1b_4_compress, lzo1b_decompress,
LZO1B_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1B,
5, 0, lzo1b_5_compress, lzo1b_decompress,
LZO1B_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1B,
6, 0, lzo1b_6_compress, lzo1b_decompress,
LZO1B_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1B,
7, 0, lzo1b_7_compress, lzo1b_decompress,
LZO1B_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1B,
8, 0, lzo1b_8_compress, lzo1b_decompress,
LZO1B_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1B,
9, 0, lzo1b_9_compress, lzo1b_decompress,
LZO1B_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1B,
99, 0, lzo1b_99_compress, lzo1b_decompress,
LZO1B_99_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1B,
999, 0, lzo1b_999_compress, lzo1b_decompress,
LZO1B_999_MEM_COMPRESS),
},
{
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1C,
1, 0, lzo1c_1_compress, lzo1c_decompress,
LZO1C_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1C,
5, 0, lzo1c_5_compress, lzo1c_decompress,
LZO1C_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1C,
9, 0, lzo1c_9_compress, lzo1c_decompress,
LZO1C_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1C,
99, 0, lzo1c_99_compress, lzo1c_decompress,
LZO1C_99_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1C,
999, 0, lzo1c_999_compress, lzo1c_decompress,
LZO1C_999_MEM_COMPRESS),
},
{
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1F,
1, 0, lzo1f_1_compress, lzo1f_decompress,
LZO1F_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1F,
999, 0, lzo1f_999_compress, lzo1f_decompress,
LZO1F_999_MEM_COMPRESS),
},
{
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1X,
1, 0, lzo1x_1_compress, lzo1x_decompress,
LZO1X_1_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1X,
1, 11, lzo1x_1_11_compress, lzo1x_decompress,
LZO1X_1_11_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1X,
1, 12, lzo1x_1_12_compress, lzo1x_decompress,
LZO1X_1_12_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1X,
1, 15, lzo1x_1_15_compress, lzo1x_decompress,
LZO1X_1_15_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1X,
999, 0, lzo1x_999_compress, lzo1x_decompress,
LZO1X_999_MEM_COMPRESS),
},
{
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1Y,
1, 0, lzo1y_1_compress, lzo1y_decompress,
LZO1Y_MEM_COMPRESS),
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1Y,
999, 0, lzo1y_999_compress, lzo1y_decompress,
LZO1Y_999_MEM_COMPRESS),
},
{
LzoAlgorithm(LzoAlgorithm::Category::LZO1, LzoAlgorithm::Type::LZO1Z,
999, 0, lzo1z_999_compress, lzo1z_decompress,
LZO1Z_999_MEM_COMPRESS),
},
{
LzoAlgorithm(LzoAlgorithm::Category::LZO2, LzoAlgorithm::Type::LZO2A,
999, 0, lzo2a_999_compress, lzo2a_decompress,
LZO2A_999_MEM_COMPRESS),
},
};
return *algorithms;
}
void FuzzLzoAlgorithm(const LzoAlgorithm& algorithm,
const std::vector<uint8_t>& input_buffer) {
std::unique_ptr<uint8_t[]> working_buffer(
new uint8_t[algorithm.working_memory_size]);
std::unique_ptr<uint8_t[]> compressed_buffer(
new uint8_t[algorithm.GetMaxCompressedSize(input_buffer.size())]);
lzo_uint compressed_size;
if (algorithm.compress_fn(input_buffer.data(), input_buffer.size(),
compressed_buffer.get(), &compressed_size,
working_buffer.get()) != LZO_E_OK) {
abort();
}
std::unique_ptr<uint8_t[]> decompressed_buffer(
new uint8_t[input_buffer.size()]);
lzo_uint decompressed_size;
if (algorithm.decompress_fn(compressed_buffer.get(), compressed_size,
decompressed_buffer.get(), &decompressed_size,
nullptr) != LZO_E_OK) {
abort();
}
if (decompressed_size != input_buffer.size()) {
fprintf(stderr, "Decompressed size %zu does not match original size %zu.\n",
decompressed_size, input_buffer.size());
abort();
} else if (memcmp(input_buffer.data(), decompressed_buffer.get(),
input_buffer.size()) != 0) {
fprintf(stderr,
"Decompressed buffer does not match original buffer of size %zu.\n",
input_buffer.size());
abort();
}
}
} // namespace
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
static bool initialized __attribute__((unused)) = []() {
if (lzo_init() != LZO_E_OK) {
abort();
}
return true;
}();
FuzzedDataProvider data_provider(data, size);
const auto& algorithms = GetLzoAlgorithms();
const auto first_level_index =
data_provider.ConsumeIntegralInRange<size_t>(0, algorithms.size() - 1);
const auto& algorithm_group = algorithms[first_level_index];
const auto second_level_index = data_provider.ConsumeIntegralInRange<size_t>(
0, algorithm_group.size() - 1);
const std::vector<uint8_t> input_buffer =
data_provider.ConsumeRemainingBytes<uint8_t>();
FuzzLzoAlgorithm(algorithm_group[second_level_index], input_buffer);
return 0;
}
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