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 "hcamera_device_manager_fuzzer.h"
17
18 #include "camera_log.h"
19 #include "message_parcel.h"
20 #include <cstddef>
21 #include <cstdint>
22 #include <memory>
23 #include "token_setproc.h"
24 #include "nativetoken_kit.h"
25 #include "accesstoken_kit.h"
26 #include "securec.h"
27 #include "ipc_skeleton.h"
28
29 namespace OHOS {
30 namespace CameraStandard {
31 using namespace OHOS::HDI::Camera::V1_0;
32 static constexpr int32_t MAX_CODE_LEN = 512;
33 static constexpr int32_t MIN_SIZE_NUM = 4;
34 static const uint8_t* RAW_DATA = nullptr;
35 const size_t THRESHOLD = 10;
36 static size_t g_dataSize = 0;
37 static size_t g_pos;
38 sptr<HCameraDevice> g_HCameraDevice = nullptr;
39 std::string g_cameraID;
40
41 /*
42 * describe: get data from outside untrusted data(g_data) which size is according to sizeof(T)
43 * tips: only support basic type
44 */
45 template<class T>
GetData()46 T GetData()
47 {
48 T object {};
49 size_t objectSize = sizeof(object);
50 if (RAW_DATA == nullptr || objectSize > g_dataSize - g_pos) {
51 return object;
52 }
53 errno_t ret = memcpy_s(&object, objectSize, RAW_DATA + g_pos, objectSize);
54 if (ret != EOK) {
55 return {};
56 }
57 g_pos += objectSize;
58 return object;
59 }
60
61 template<class T>
GetArrLength(T & arr)62 uint32_t GetArrLength(T& arr)
63 {
64 if (arr == nullptr) {
65 MEDIA_INFO_LOG("%{public}s: The array length is equal to 0", __func__);
66 return 0;
67 }
68 return sizeof(arr) / sizeof(arr[0]);
69 }
70
InitCameraDevice()71 void InitCameraDevice()
72 {
73 if (g_HCameraDevice != nullptr) {
74 return;
75 }
76 sptr<HCameraHostManager> cameraHostManager = new HCameraHostManager(nullptr);
77 std::vector<std::string> cameraIds;
78 cameraHostManager->GetCameras(cameraIds);
79 CHECK_ERROR_RETURN_LOG(cameraIds.empty(), "Fuzz:PrepareHCameraDevice: GetCameras returns empty");
80 g_cameraID = cameraIds[0];
81 auto callingTokenId = IPCSkeleton::GetCallingTokenID();
82 std::string permissionName = OHOS_PERMISSION_CAMERA;
83 int32_t ret = CheckPermission(permissionName, callingTokenId);
84 CHECK_ERROR_RETURN_LOG(ret != CAMERA_OK, "Fuzz:PrepareHCameraDevice: CheckPermission Failed");
85 g_HCameraDevice = new HCameraDevice(cameraHostManager, g_cameraID, callingTokenId);
86 }
87
HCameraDeviceManagerFuzzTest1()88 void HCameraDeviceManagerFuzzer::HCameraDeviceManagerFuzzTest1()
89 {
90 if ((RAW_DATA == nullptr) || (g_dataSize > MAX_CODE_LEN) || (g_dataSize < MIN_SIZE_NUM)) {
91 return;
92 }
93 auto hCameraDeviceManager = HCameraDeviceManager::GetInstance();
94 if (hCameraDeviceManager == nullptr) {
95 MEDIA_INFO_LOG("hCameraDeviceManager is null");
96 return;
97 };
98 InitCameraDevice();
99 pid_t pid = GetData<int32_t>();
100 hCameraDeviceManager->GetCameraHolderByPid(pid);
101 hCameraDeviceManager->GetCamerasByPid(pid);
102 hCameraDeviceManager->GetActiveClient();
103 hCameraDeviceManager->GetActiveCameraHolders();
104 int32_t state = GetData<int32_t>();
105 hCameraDeviceManager->SetStateOfACamera(g_cameraID, state);
106 hCameraDeviceManager->GetCameraStateOfASide();
107 sptr<ICameraBroker> callback = nullptr;
108 hCameraDeviceManager->SetPeerCallback(callback);
109 hCameraDeviceManager->UnsetPeerCallback();
110 std::vector<sptr<HCameraDevice>> cameraNeedEvict = {};
111 int32_t type = 0;
112 hCameraDeviceManager->GetConflictDevices(cameraNeedEvict, g_HCameraDevice, type);
113 hCameraDeviceManager->RemoveDevice(g_cameraID);
114 int32_t processState = GetData<int32_t>();
115 hCameraDeviceManager->GenerateEachProcessCameraState(processState, GetData<uint32_t>());
116 hCameraDeviceManager->IsMultiCameraActive(pid);
117 }
118
Test()119 void Test()
120 {
121 auto hCameraDeviceManagerFuzzer = std::make_unique<HCameraDeviceManagerFuzzer>();
122 if (hCameraDeviceManagerFuzzer == nullptr) {
123 MEDIA_INFO_LOG("hCameraDeviceManagerFuzzer is null");
124 return;
125 }
126 hCameraDeviceManagerFuzzer->HCameraDeviceManagerFuzzTest1();
127 }
128
129 typedef void (*TestFuncs[1])();
130
131 TestFuncs g_testFuncs = {
132 Test,
133 };
134
FuzzTest(const uint8_t * rawData,size_t size)135 bool FuzzTest(const uint8_t* rawData, size_t size)
136 {
137 // initialize data
138 RAW_DATA = rawData;
139 g_dataSize = size;
140 g_pos = 0;
141
142 uint32_t code = GetData<uint32_t>();
143 uint32_t len = GetArrLength(g_testFuncs);
144 if (len > 0) {
145 g_testFuncs[code % len]();
146 } else {
147 MEDIA_INFO_LOG("%{public}s: The len length is equal to 0", __func__);
148 }
149
150 return true;
151 }
152 } // namespace CameraStandard
153 } // namespace OHOS
154
155 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(uint8_t * data,size_t size)156 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size)
157 {
158 if (size < OHOS::CameraStandard::THRESHOLD) {
159 return 0;
160 }
161
162 OHOS::CameraStandard::FuzzTest(data, size);
163 return 0;
164 }