miscservices_screenlock/test/fuzztest/screenlockunlockcallback_fuzzer/screenlockunlockcallback_fuzzer.cpp

/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * 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 "screenlockunlockcallback_fuzzer.h"

#include <cstddef>
#include <cstdint>

#include "screenlock_unlock_callback.h"
#include "message_parcel.h"

using namespace OHOS::ScreenLock;

namespace OHOS {
constexpr size_t THRESHOLD = 10;
constexpr int32_t OFFSET = 4;
const std::u16string SCREENLOCKUCB_INTERFACE_TOKEN = u"ohos.miscseervice.request";

uint32_t ConvertToUint32(const uint8_t* ptr)
{
    if (ptr == nullptr) {
        return 0;
    }
    uint32_t bigvar = (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
    return bigvar;
}

bool FuzzScreenlockUnlockCallback(const uint8_t* rawData, size_t size)
{
    uint32_t code = ConvertToUint32(rawData);
    rawData = rawData + OFFSET;
    size = size - OFFSET;
    
    EventListener mEventListener;
    MessageParcel data;
    data.WriteInterfaceToken(SCREENLOCKUCB_INTERFACE_TOKEN);
    data.WriteBuffer(rawData, size);
    data.RewindRead(0);
    MessageParcel reply;
    MessageOption option;
    
    sptr<ScreenlockUnlockCallback> mScreenlock = new ScreenlockUnlockCallback(mEventListener);
    mScreenlock->OnRemoteRequest(code, data, reply, option);

    return true;
}
}

/* Fuzzer entry point */
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
    if (size < OHOS::THRESHOLD) {
        return -1;
    }

    /* Run your code on data */
    OHOS::FuzzScreenlockUnlockCallback(data, size);
    return 0;
}