1/*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include "motion_fuzzer.h"
17#include <cstddef>
18#include <cstdint>
19#include "hdf_log.h"
20#include "v1_1/motion_interface_stub.h"
21
22using namespace OHOS::HDI::Motion::V1_1;
23
24namespace OHOS {
25constexpr size_t THRESHOLD = 10;
26constexpr int32_t OFFSET = 4;
27constexpr int32_t ARRAY0 = 0;
28constexpr int32_t ARRAY1 = 1;
29constexpr int32_t ARRAY2 = 2;
30constexpr int32_t ARRAY3 = 3;
31constexpr int32_t DIGIT8 = 8;
32constexpr int32_t DIGIT16 = 16;
33constexpr int32_t DIGIT24 = 24;
34
35const std::u16string MOTION_INTERFACE_TOKEN = u"ohos.hdi.motion.v1_1.IMotionInterface";
36
37uint32_t Convert2Uint32(const uint8_t* ptr)
38{
39    if (ptr == nullptr) {
40        return 0;
41    }
42    /*
43     * Move the 0th digit 24 to the left, the first digit 16 to the left, the second digit 8 to the left,
44     * and the third digit no left
45     */
46    return (ptr[ARRAY0] << DIGIT24) | (ptr[ARRAY1] << DIGIT16) | (ptr[ARRAY2] << DIGIT8) | (ptr[ARRAY3]);
47}
48
49bool DoSomethingInterestingWithMyAPI(const uint8_t* rawData, size_t size)
50{
51    if (rawData == nullptr) {
52        return false;
53    }
54    uint32_t code = Convert2Uint32(rawData);
55    rawData = rawData + OFFSET;
56    size = size - OFFSET;
57
58    MessageParcel data;
59    data.WriteInterfaceToken(MOTION_INTERFACE_TOKEN);
60    data.WriteBuffer(rawData, size);
61    data.RewindRead(0);
62    MessageParcel reply;
63    MessageOption option;
64    sptr<OHOS::HDI::Motion::V1_1::IMotionInterface> g_motionInterface =
65        OHOS::HDI::Motion::V1_1::IMotionInterface::Get(false);
66    if (g_motionInterface == nullptr) {
67        HDF_LOGE("%{public}s:IMotionInterface::Get() failed.", __func__);
68        return false;
69    }
70    sptr<OHOS::HDI::Motion::V1_1::MotionInterfaceStub> motionInterface =
71        new OHOS::HDI::Motion::V1_1::MotionInterfaceStub(g_motionInterface);
72    if (motionInterface == nullptr) {
73        HDF_LOGE("%{public}s:new MotionInterfaceStub failed.", __func__);
74        return false;
75    }
76    motionInterface->OnRemoteRequest(code, data, reply, option);
77
78    return true;
79}
80}
81
82/* Fuzzer entry point */
83extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
84{
85    if (size < OHOS::THRESHOLD) {
86        return 0;
87    }
88
89    /* Run your code on data */
90    OHOS::DoSomethingInterestingWithMyAPI(data, size);
91    return 0;
92}
93
94