69 lines
1.7 KiB
C++
69 lines
1.7 KiB
C++
/*
|
|
__ _____ _____ _____
|
|
__| | __| | | | JSON for Modern C++ (fuzz test support)
|
|
| | |__ | | | | | | version 3.7.3
|
|
|_____|_____|_____|_|___| https://github.com/nlohmann/json
|
|
|
|
This file implements a parser test suitable for fuzz testing. Given a byte
|
|
array data, it performs the following steps:
|
|
|
|
- j1 = parse(data)
|
|
- s1 = serialize(j1)
|
|
- j2 = parse(s1)
|
|
- s2 = serialize(j2)
|
|
- assert(s1 == s2)
|
|
|
|
The provided function `LLVMFuzzerTestOneInput` can be used in different fuzzer
|
|
drivers.
|
|
|
|
Licensed under the MIT License <http://opensource.org/licenses/MIT>.
|
|
*/
|
|
|
|
#include <iostream>
|
|
#include <sstream>
|
|
#include <nlohmann/json.hpp>
|
|
|
|
using json = nlohmann::json;
|
|
|
|
// see http://llvm.org/docs/LibFuzzer.html
|
|
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
|
|
{
|
|
try
|
|
{
|
|
// step 1: parse input
|
|
json j1 = json::parse(data, data + size);
|
|
|
|
try
|
|
{
|
|
// step 2: round trip
|
|
|
|
// first serialization
|
|
std::string s1 = j1.dump();
|
|
|
|
// parse serialization
|
|
json j2 = json::parse(s1);
|
|
|
|
// second serialization
|
|
std::string s2 = j2.dump();
|
|
|
|
// serializations must match
|
|
assert(s1 == s2);
|
|
}
|
|
catch (const json::parse_error&)
|
|
{
|
|
// parsing a JSON serialization must not fail
|
|
assert(false);
|
|
}
|
|
}
|
|
catch (const json::parse_error&)
|
|
{
|
|
// parse errors are ok, because input may be random bytes
|
|
}
|
|
catch (const json::out_of_range&)
|
|
{
|
|
// out of range errors may happen if provided sizes are excessive
|
|
}
|
|
|
|
// return 0 - non-zero return values are reserved for future use
|
|
return 0;
|
|
}
|