1 /*
2 * Copyright (c) 2022-2023 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 #include "securec.h"
16 #include "devicestandby_fuzzer.h"
17
18 #include "standby_service.h"
19
20 namespace OHOS {
21 namespace DevStandbyMgr {
22 constexpr size_t U32_AT_SIZE = 4;
23 constexpr uint32_t MAX_CODE = 11;
24 constexpr uint8_t TWENTYFOUR = 24;
25 constexpr uint8_t SIXTEEN = 16;
26 constexpr uint8_t EIGHT = 8;
27 constexpr uint8_t TWO = 2;
28 constexpr int32_t THREE = 3;
29 const std::u16string DEVICE_STANDBY_TOKEN = u"ohos.resourceschedule.IStandbyService";
30
GetU32Data(const char * ptr)31 uint32_t GetU32Data(const char* ptr)
32 {
33 return (ptr[0] << TWENTYFOUR) | (ptr[1] << SIXTEEN) | (ptr[TWO] << EIGHT) | (ptr[THREE]);
34 }
35
DoSomethingInterestingWithMyAPI(const char * data,size_t size)36 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
37 {
38 uint32_t code = GetU32Data(data);
39 MessageParcel datas;
40 datas.WriteInterfaceToken(DEVICE_STANDBY_TOKEN);
41 datas.WriteBuffer(data, size);
42 datas.RewindRead(0);
43 MessageParcel reply;
44 MessageOption option;
45 uint32_t inputCode = code % MAX_CODE;
46 if (inputCode > 0) {
47 DelayedSingleton<StandbyService>::GetInstance()->OnRemoteRequest(inputCode,
48 datas, reply, option);
49 }
50 return true;
51 }
52 } // namespace DevStandbyMgr
53 } // namespace OHOS
54
55 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)56 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
57 {
58 /* Run your code on data */
59 if (data == nullptr) {
60 return 0;
61 }
62
63 if (size < OHOS::DevStandbyMgr::U32_AT_SIZE) {
64 return 0;
65 }
66
67 char* ch = (char *)malloc(size + 1);
68 if (ch == nullptr) {
69 return 0;
70 }
71
72 (void)memset_s(ch, size + 1, 0x00, size + 1);
73 if (memcpy_s(ch, size, data, size) != EOK) {
74 free(ch);
75 ch = nullptr;
76 return 0;
77 }
78
79 OHOS::DevStandbyMgr::DoSomethingInterestingWithMyAPI(ch, size);
80 free(ch);
81 ch = nullptr;
82 return 0;
83 }
84