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// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "common.h"
#include <fuzzer/FuzzedDataProvider.h>
#ifndef HASHTYPE
#error Macro HASHTYPE must be defined.
#endif
#ifndef FNAME
#error Macro FNAME must be defined.
#endif
#define CONCAT_TYPE(x) _PASTE2(HASHTYPE, x)
#define init CONCAT_TYPE(_init)
#define update CONCAT_TYPE(_update)
#define digest CONCAT_TYPE(_digest)
#define destroy CONCAT_TYPE(_destroy)
#define STR(x) #x
#define INCLUDE(x) STR(x)
#include INCLUDE(FNAME)
#ifndef DIGEST_SIZE
#error Macro DIGEST_SIZE must be defined.
#endif
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
if (!size)
return 0;
FuzzedDataProvider stream(data, size);
hash_state *hs;
if (init(&hs))
return 0;
while (stream.remaining_bytes()) {
size_t num_bytes = stream.ConsumeIntegral<size_t>();
std::vector<uint8_t> buffer = stream.ConsumeBytes<uint8_t>(num_bytes);
if (update(hs, buffer.data(), buffer.size()))
goto error;
}
uint8_t result[DIGEST_SIZE];
#ifndef DIGEST_THIRD_PARAM
digest(hs, result);
#else
digest(hs, result, DIGEST_SIZE);
#endif
error:
destroy(hs);
return 0;
}
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