/* __ _____ _____ _____ __| | __| | | | JSON for Modern C++ (fuzz test support) | | |__ | | | | | | version 2.0.10 |_____|_____|_____|_|___| 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 = from_cbor(data) - vec = to_cbor(j1) - j2 = from_cbor(vec) - assert(j1 == j2) The provided function `LLVMFuzzerTestOneInput` can be used in different fuzzer drivers. Licensed under the MIT License . */ #include #include #include 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 std::vector vec1(data, data + size); json j1 = json::from_cbor(vec1); try { // step 2: round trip std::vector vec2 = json::to_cbor(j1); // parse serialization json j2 = json::from_cbor(vec2); // deserializations must match assert(j1 == j2); } catch (const std::invalid_argument&) { // parsing a CBOR serialization must not fail assert(false); } } catch (const std::invalid_argument&) { // parse errors are ok, because input may be random bytes } catch (const std::out_of_range&) { // parse errors are ok, because input may be random bytes } catch (const std::domain_error&) { // parse errors are ok, because input may be random bytes } // return 0 - non-zero return values are reserved for future use return 0; }