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// Copyright (c) 2020-2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <crypto/muhash.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <vector>
FUZZ_TARGET(muhash)
{
FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
std::vector<uint8_t> data{ConsumeRandomLengthByteVector(fuzzed_data_provider)};
std::vector<uint8_t> data2{ConsumeRandomLengthByteVector(fuzzed_data_provider)};
MuHash3072 muhash;
muhash.Insert(data);
muhash.Insert(data2);
const std::string initial_state_hash{"dd5ad2a105c2d29495f577245c357409002329b9f4d6182c0af3dc2f462555c8"};
uint256 out;
uint256 out2;
CallOneOf(
fuzzed_data_provider,
[&] {
// Test that MuHash result is consistent independent of order of operations
muhash.Finalize(out);
muhash = MuHash3072();
muhash.Insert(data2);
muhash.Insert(data);
muhash.Finalize(out2);
},
[&] {
// Test that multiplication with the initial state never changes the finalized result
muhash.Finalize(out);
MuHash3072 muhash3;
muhash3 *= muhash;
muhash3.Finalize(out2);
},
[&] {
// Test that dividing a MuHash by itself brings it back to it's initial state
muhash /= muhash;
muhash.Finalize(out);
out2 = uint256S(initial_state_hash);
},
[&] {
// Test that removing all added elements brings the object back to it's initial state
muhash.Remove(data);
muhash.Remove(data2);
muhash.Finalize(out);
out2 = uint256S(initial_state_hash);
});
assert(out == out2);
}
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