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 "wallpaperservice_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "message_parcel.h"
22 #include "wallpaper_service.h"
23
24 using namespace OHOS::WallpaperMgrService;
25
26 namespace OHOS {
27 constexpr size_t THRESHOLD = 10;
28 constexpr int32_t OFFSET = 4;
29 const std::u16string WALLPAPERSERVICES_INTERFACE_TOKEN = u"ohos.Wallpaper.IWallpaperService";
30
31 using namespace OHOS::Security::AccessToken;
32
ConvertToUint32(const uint8_t * ptr)33 uint32_t ConvertToUint32(const uint8_t* ptr)
34 {
35 if (ptr == nullptr) {
36 return 0;
37 }
38 uint32_t bigVar = (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
39 return bigVar;
40 }
41
FuzzWallpaperService(const uint8_t * rawData,size_t size)42 bool FuzzWallpaperService(const uint8_t* rawData, size_t size)
43 {
44 uint32_t code = ConvertToUint32(rawData);
45 rawData = rawData + OFFSET;
46 size = size - OFFSET;
47
48 MessageParcel data;
49 data.WriteInterfaceToken(WALLPAPERSERVICES_INTERFACE_TOKEN);
50 data.WriteBuffer(rawData, size);
51 data.RewindRead(0);
52 MessageParcel reply;
53 MessageOption option;
54
55 WallpaperService::GetInstance()->OnRemoteRequest(code, data, reply, option);
56
57 return true;
58 }
59 }
60
61 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)62 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
63 {
64 if (size < OHOS::THRESHOLD) {
65 return 0;
66 }
67
68 /* Run your code on data */
69 OHOS::FuzzWallpaperService(data, size);
70 return 0;
71 }