68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
/*
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__ _____ _____ _____
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__| | __| | | | JSON for Modern C++ (fuzz test support)
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| | |__ | | | | | | version 3.5.0
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|_____|_____|_____|_|___| https://github.com/nlohmann/json
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This file implements a parser test suitable for fuzz testing. Given a byte
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array data, it performs the following steps:
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- j1 = from_ubjson(data)
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- vec = to_ubjson(j1)
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- j2 = from_ubjson(vec)
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- assert(j1 == j2)
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The provided function `LLVMFuzzerTestOneInput` can be used in different fuzzer
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drivers.
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Licensed under the MIT License <http://opensource.org/licenses/MIT>.
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*/
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#include <iostream>
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#include <sstream>
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#include <nlohmann/json.hpp>
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using json = nlohmann::json;
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// see http://llvm.org/docs/LibFuzzer.html
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
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{
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try
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{
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// step 1: parse input
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std::vector<uint8_t> vec1(data, data + size);
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json j1 = json::from_ubjson(vec1);
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try
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{
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// step 2: round trip
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std::vector<uint8_t> vec2 = json::to_ubjson(j1);
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// parse serialization
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json j2 = json::from_ubjson(vec2);
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// serializations must match
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assert(json::to_ubjson(j2) == vec2);
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}
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catch (const json::parse_error&)
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{
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// parsing a UBJSON serialization must not fail
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assert(false);
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}
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}
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catch (const json::parse_error&)
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{
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// parse errors are ok, because input may be random bytes
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}
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catch (const json::type_error&)
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{
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// type errors can occur during parsing, too
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}
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catch (const json::out_of_range&)
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{
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// out of range errors may happen if provided sizes are excessive
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}
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// return 0 - non-zero return values are reserved for future use
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return 0;
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}
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