1 /*
2 * Copyright (c) 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
16 #include "devicestatusstub_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "securec.h"
22 #include "singleton.h"
23
24 #define private public
25 #include "devicestatus_service.h"
26 #include "message_parcel.h"
27
28 using namespace OHOS::Msdp::DeviceStatus;
29
30 namespace OHOS {
31 constexpr size_t FOO_MAX_LEN { 1024 };
32 constexpr size_t MIN_SIZE { 4 };
33 const std::u16string FORMMGR_DEVICE_TOKEN { u"ohos.msdp.Idevicestatus" };
34
GetU32Data(const char * ch,size_t size)35 uint32_t GetU32Data(const char* ch, size_t size)
36 {
37 if (ch == nullptr) {
38 return 0;
39 }
40 if (size < MIN_SIZE) {
41 return 0;
42 }
43 // 将第0个数字左移24位，将第1个数字左移16位，将第2个数字左移8位，第3个数字不左移
44 return (ch[0] << 24) | (ch[1] << 16) | (ch[2] << 8) | (ch[3]);
45 }
46
DoSomethingWithMyAPI(const char * data,size_t size)47 bool DoSomethingWithMyAPI(const char* data, size_t size)
48 {
49 uint32_t code = GetU32Data(data, size);
50 MessageParcel datas;
51 datas.WriteInterfaceToken(FORMMGR_DEVICE_TOKEN);
52 datas.WriteBuffer(data, size);
53 datas.RewindRead(0);
54 MessageParcel reply;
55 MessageOption option;
56 DelayedSingleton<DeviceStatusService>::GetInstance()->OnRemoteRequest(code, datas, reply, option);
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 /* Run your code on data */
65 if (data == nullptr) {
66 return 0;
67 }
68
69 /* Validate the length of size */
70 if ((size < OHOS::MIN_SIZE) || (size > OHOS::FOO_MAX_LEN)) {
71 return 0;
72 }
73 const char* ch = reinterpret_cast<const char*>(data);
74 OHOS::DoSomethingWithMyAPI(ch, size);
75 return 0;
76 }
77
78