mirror of
https://github.com/google/flatbuffers.git
synced 2026-06-07 22:03:40 +00:00
82836a62be
* [idl_parser] Improve stack overflow protection Add stack overflow protection for Flexbuffer and nested Flatbuffer parsers. Replaces the `Recurse()` method by the new ParseDepthGuard RAII class. * Remove move operator from Parser. It was wrong decision to add move ctor and assignment into Parser class. These operators will make it extremely difficult to add constant or reference fields in the future. * Remove ';' from definition of FLATBUFFERS_DELETE_FUNC * Format code * Make this PR compatible with MSVC2010 (it doesn't support inherited ctor)
101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
/*
|
|
* Copyright 2014 Google Inc. All rights reserved.
|
|
*
|
|
* 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 <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include <clocale>
|
|
#include <string>
|
|
|
|
#include "cpp17/generated_cpp17/monster_test_generated.h"
|
|
#include "flatbuffers/idl.h"
|
|
#include "test_init.h"
|
|
|
|
namespace {
|
|
|
|
static constexpr size_t kMinInputLength = 1;
|
|
static constexpr size_t kMaxInputLength = 99000;
|
|
|
|
static constexpr uint8_t flags_strict_json = 0x80;
|
|
static constexpr uint8_t flags_skip_unexpected_fields_in_json = 0x40;
|
|
static constexpr uint8_t flags_allow_non_utf8 = 0x20;
|
|
|
|
std::string LoadBinarySchema(const char *file_name) {
|
|
std::string schemafile;
|
|
TEST_EQ(true,
|
|
flatbuffers::LoadFile(file_name, true, &schemafile));
|
|
|
|
flatbuffers::Verifier verifier(
|
|
reinterpret_cast<const uint8_t *>(schemafile.c_str()),
|
|
schemafile.size());
|
|
TEST_EQ(true, reflection::VerifySchemaBuffer(verifier));
|
|
return schemafile;
|
|
}
|
|
|
|
std::string do_test(const flatbuffers::IDLOptions &opts,
|
|
const std::string input_json) {
|
|
// once loaded from disk
|
|
static const std::string schemafile = LoadBinarySchema("./monster_test.bfbs");
|
|
// parse schema first, so we can use it to parse the data after
|
|
flatbuffers::Parser parser;
|
|
TEST_EQ(true, parser.Deserialize(
|
|
reinterpret_cast<const uint8_t *>(schemafile.c_str()),
|
|
schemafile.size()));
|
|
// (re)define parser options
|
|
parser.opts = opts;
|
|
|
|
std::string jsongen;
|
|
if (parser.ParseJson(input_json.c_str())) {
|
|
flatbuffers::Verifier verifier(parser.builder_.GetBufferPointer(),
|
|
parser.builder_.GetSize());
|
|
TEST_EQ(true, MyGame::Example::VerifyMonsterBuffer(verifier));
|
|
TEST_ASSERT(
|
|
GenerateText(parser, parser.builder_.GetBufferPointer(), &jsongen));
|
|
}
|
|
return jsongen;
|
|
};
|
|
} // namespace
|
|
|
|
// Utility for test run.
|
|
OneTimeTestInit OneTimeTestInit::one_time_init_;
|
|
|
|
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
|
|
// Reserve one byte for Parser flags and one byte for repetition counter.
|
|
if (size < 3) return 0;
|
|
const uint8_t flags = data[0];
|
|
(void)data[1]; // reserved
|
|
data += 2;
|
|
size -= 2; // bypass
|
|
|
|
const std::string original(reinterpret_cast<const char *>(data), size);
|
|
auto input = std::string(original.c_str()); // until '\0'
|
|
if (input.size() < kMinInputLength || input.size() > kMaxInputLength)
|
|
return 0;
|
|
|
|
flatbuffers::IDLOptions opts;
|
|
opts.strict_json = (flags & flags_strict_json);
|
|
opts.skip_unexpected_fields_in_json =
|
|
(flags & flags_skip_unexpected_fields_in_json);
|
|
opts.allow_non_utf8 = (flags & flags_allow_non_utf8);
|
|
|
|
const std::string jsongen_1 = do_test(opts, input);
|
|
if (!jsongen_1.empty()) {
|
|
const std::string jsongen_2 = do_test(opts, jsongen_1);
|
|
TEST_EQ(jsongen_1, jsongen_2);
|
|
}
|
|
return 0;
|
|
}
|