| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <clocale> |
| #include <string> |
| |
| #include "flatbuffers/idl.h" |
| #include "test_init.h" |
| |
| static constexpr size_t kMinInputLength = 1; |
| static constexpr size_t kMaxInputLength = 16384; |
| |
| 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; |
| |
| // 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); |
| |
| flatbuffers::Parser parser(opts); |
| |
| // Guarantee 0-termination in the input. |
| auto parse_input = input.c_str(); |
| |
| // Check Parser. |
| parser.Parse(parse_input); |
| // TODO: |
| // Need to add additional checks for inputs passed Parse(parse_input) successfully: |
| // 1. Serialization to bfbs. |
| // 2. Generation of a default object. |
| // 3. Verification of the object using reflection. |
| // 3. Printing to json. |
| return 0; |
| } |