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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/loader/merkle_integrity_source_stream.h" // nogncheck
#include <fuzzer/FuzzedDataProvider.h>
#include <string>
#include "base/memory/scoped_refptr.h"
#include "net/base/io_buffer.h"
#include "net/base/test_completion_callback.h"
#include "net/filter/fuzzed_source_stream.h"
// Fuzzer for MerkleIntegritySourceStream
//
// |data| contains a header prefix, and then is used to build a
// FuzzedSourceStream.
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
FuzzedDataProvider data_provider(data, size);
std::string header = data_provider.ConsumeRandomLengthString(256);
net::TestCompletionCallback callback;
auto fuzzed_source_stream =
std::make_unique<net::FuzzedSourceStream>(&data_provider);
auto mi_stream = std::make_unique<content::MerkleIntegritySourceStream>(
header, std::move(fuzzed_source_stream));
while (true) {
size_t read_size = data_provider.ConsumeIntegralInRange(1, 1024);
auto io_buffer = base::MakeRefCounted<net::IOBufferWithSize>(read_size);
int result = mi_stream->Read(io_buffer.get(), io_buffer->size(),
callback.callback());
// Releasing the pointer to IOBuffer immediately is more likely to lead to a
// use-after-free.
io_buffer = nullptr;
if (callback.GetResult(result) <= 0)
break;
}
return 0;
}
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