1 /*
2 * Copyright (c) 2024 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 "camera_window_manager_client_fuzzer.h"
17 #include "camera_log.h"
18 #include "securec.h"
19
20 namespace OHOS {
21 namespace CameraStandard {
22 static constexpr int32_t MAX_CODE_LEN = 512;
23 static constexpr int32_t MIN_SIZE_NUM = 4;
24 static const uint8_t* RAW_DATA = nullptr;
25 const size_t THRESHOLD = 10;
26 static size_t g_dataSize = 0;
27 static size_t g_pos;
28
29 sptr<CameraWindowManagerClient> CameraWindowManagerClientFuzzer::fuzz_{nullptr};
30 std::shared_ptr<CameraWindowManagerClient::WMSSaStatusChangeCallback>
31 CameraWindowManagerClientFuzzer::callback_{nullptr};
32
33 /*
34 * describe: get data from outside untrusted data(g_data) which size is according to sizeof(T)
35 * tips: only support basic type
36 */
37 template<class T>
GetData()38 T GetData()
39 {
40 T object {};
41 size_t objectSize = sizeof(object);
42 if (RAW_DATA == nullptr || objectSize > g_dataSize - g_pos) {
43 return object;
44 }
45 errno_t ret = memcpy_s(&object, objectSize, RAW_DATA + g_pos, objectSize);
46 if (ret != EOK) {
47 return {};
48 }
49 g_pos += objectSize;
50 return object;
51 }
52
53 template<class T>
GetArrLength(T & arr)54 uint32_t GetArrLength(T& arr)
55 {
56 if (arr == nullptr) {
57 MEDIA_INFO_LOG("%{public}s: The array length is equal to 0", __func__);
58 return 0;
59 }
60 return sizeof(arr) / sizeof(arr[0]);
61 }
62
CameraWindowManagerClientFuzzTest()63 void CameraWindowManagerClientFuzzer::CameraWindowManagerClientFuzzTest()
64 {
65 if ((RAW_DATA == nullptr) || (g_dataSize > MAX_CODE_LEN) || (g_dataSize < MIN_SIZE_NUM)) {
66 return;
67 }
68
69 fuzz_ = CameraWindowManagerClient::GetInstance();
70 CHECK_ERROR_RETURN_LOG(!fuzz_, "Create fuzz_ Error");
71 pid_t pid;
72 int32_t systemAbilityId = GetData<int32_t>();
73 uint8_t randomNum = GetData<uint8_t>();
74 std::vector<std::string> testStrings = {"test1", "test2"};
75 std::string deviceId(testStrings[randomNum % testStrings.size()]);
76 fuzz_->InitWindowProxy();
77 fuzz_->GetFocusWindowInfo(pid);
78 fuzz_->GetWindowManagerAgent();
79 if (callback_ == nullptr) {
80 callback_ = std::make_shared<CameraWindowManagerClient::WMSSaStatusChangeCallback>();
81 }
82 callback_->OnRemoveSystemAbility(systemAbilityId, deviceId);
83 fuzz_->UnregisterWindowManagerAgent();
84 }
85
Test()86 void Test()
87 {
88 auto cameraWindowManagerClient = std::make_unique<CameraWindowManagerClientFuzzer>();
89 if (cameraWindowManagerClient == nullptr) {
90 MEDIA_INFO_LOG("cameraWindowManagerClient is null");
91 return;
92 }
93 cameraWindowManagerClient->CameraWindowManagerClientFuzzTest();
94 }
95
96 typedef void (*TestFuncs[1])();
97
98 TestFuncs g_testFuncs = {
99 Test,
100 };
101
FuzzTest(const uint8_t * rawData,size_t size)102 bool FuzzTest(const uint8_t* rawData, size_t size)
103 {
104 // initialize data
105 RAW_DATA = rawData;
106 g_dataSize = size;
107 g_pos = 0;
108
109 uint32_t code = GetData<uint32_t>();
110 uint32_t len = GetArrLength(g_testFuncs);
111 if (len > 0) {
112 g_testFuncs[code % len]();
113 } else {
114 MEDIA_INFO_LOG("%{public}s: The len length is equal to 0", __func__);
115 }
116
117 return true;
118 }
119
120 } // namespace CameraStandard
121 } // namespace OHOS
122
123 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(uint8_t * data,size_t size)124 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size)
125 {
126 if (size < OHOS::CameraStandard::THRESHOLD) {
127 return 0;
128 }
129
130 OHOS::CameraStandard::FuzzTest(data, size);
131 return 0;
132 }