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 "vibrator_fuzzer.h"
17 #include <cstddef>
18 #include <cstdint>
19 #include "hdf_log.h"
20 #include "vibrator_interface_impl.h"
21 #include "v1_1/vibrator_interface_stub.h"
22
23 using namespace OHOS::HDI::Vibrator::V1_1;
24
25 namespace OHOS {
26 constexpr size_t THRESHOLD = 10;
27 constexpr int32_t OFFSET = 4;
28 const std::u16string VIBRATOR_INTERFACE_TOKEN = u"ohos.hdi.vibrator.v1_1.IVibratorInterface";
29
Convert2Uint32(const uint8_t * ptr)30 uint32_t Convert2Uint32(const uint8_t* ptr)
31 {
32 if (ptr == nullptr) {
33 return 0;
34 }
35 /*
36 * Move the 0th digit 24 to the left, the first digit 16 to the left, the second digit 8 to the left,
37 * and the third digit no left
38 */
39 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
40 }
41
DoSomethingInterestingWithMyAPI(const uint8_t * rawData,size_t size)42 bool DoSomethingInterestingWithMyAPI(const uint8_t* rawData, size_t size)
43 {
44 if (rawData == nullptr) {
45 return false;
46 }
47 uint32_t code = Convert2Uint32(rawData);
48 rawData = rawData + OFFSET;
49 size = size - OFFSET;
50
51 MessageParcel data;
52 data.WriteInterfaceToken(VIBRATOR_INTERFACE_TOKEN);
53 data.WriteBuffer(rawData, size);
54 data.RewindRead(0);
55 MessageParcel reply;
56 MessageOption option;
57 sptr<IVibratorInterface> g_vibratorInterface = IVibratorInterface::Get(false);
58 if (g_vibratorInterface == nullptr) {
59 HDF_LOGE("%{public}s:IVibratorInterface::Get() failed.", __func__);
60 return false;
61 }
62 sptr<VibratorInterfaceStub> vibratorInterface = new VibratorInterfaceStub(g_vibratorInterface);
63 if (vibratorInterface == nullptr) {
64 HDF_LOGE("%{public}s:new VibratorInterfaceStub failed.", __func__);
65 return false;
66 }
67 vibratorInterface->OnRemoteRequest(code, data, reply, option);
68
69 return true;
70 }
71 }
72
73 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)74 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
75 {
76 if (size < OHOS::THRESHOLD) {
77 return 0;
78 }
79
80 /* Run your code on data */
81 OHOS::DoSomethingInterestingWithMyAPI(data, size);
82 return 0;
83 }
84
85