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_preconfig_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20 #include <memory>
21 #include "camera_log.h"
22 #include "message_parcel.h"
23 #include "hcamera_host_manager.h"
24 #include "securec.h"
25
26 namespace OHOS {
27 namespace CameraStandard {
28 using namespace OHOS::HDI::Camera::V1_0;
29 static constexpr int32_t MAX_CODE_LEN = 512;
30 static constexpr int32_t MIN_SIZE_NUM = 4;
31 static const uint8_t* RAW_DATA = nullptr;
32 const size_t THRESHOLD = 10;
33 static size_t g_dataSize = 0;
34 static size_t g_pos;
35
36 /*
37 * describe: get data from outside untrusted data(g_data) which size is according to sizeof(T)
38 * tips: only support basic type
39 */
40 template<class T>
GetData()41 T GetData()
42 {
43 T object {};
44 size_t objectSize = sizeof(object);
45 if (RAW_DATA == nullptr || objectSize > g_dataSize - g_pos) {
46 return object;
47 }
48 errno_t ret = memcpy_s(&object, objectSize, RAW_DATA + g_pos, objectSize);
49 if (ret != EOK) {
50 return {};
51 }
52 g_pos += objectSize;
53 return object;
54 }
55
56 template<class T>
GetArrLength(T & arr)57 uint32_t GetArrLength(T& arr)
58 {
59 if (arr == nullptr) {
60 MEDIA_INFO_LOG("%{public}s: The array length is equal to 0", __func__);
61 return 0;
62 }
63 return sizeof(arr) / sizeof(arr[0]);
64 }
65
66 class StatusCallbackDemo : public HCameraHostManager::StatusCallback {
67 public:
68 virtual ~StatusCallbackDemo() = default;
OnCameraStatus(const std::string & cameraId,CameraStatus status,CallbackInvoker invoker=CallbackInvoker::CAMERA_HOST)69 virtual void OnCameraStatus(const std::string& cameraId, CameraStatus status,
70 CallbackInvoker invoker = CallbackInvoker::CAMERA_HOST) {}
OnFlashlightStatus(const std::string & cameraId,FlashStatus status)71 virtual void OnFlashlightStatus(const std::string& cameraId, FlashStatus status) {}
OnTorchStatus(TorchStatus status)72 virtual void OnTorchStatus(TorchStatus status) {}
73 };
74
HCameraPreconfigFuzzTest1()75 void HCameraPreconfigFuzzer::HCameraPreconfigFuzzTest1()
76 {
77 if ((RAW_DATA == nullptr) || (g_dataSize > MAX_CODE_LEN) || (g_dataSize < MIN_SIZE_NUM)) {
78 return;
79 }
80
81 int outFd = GetData<int32_t>();
82 CameraInfoDumper infoDumper(outFd);
83 std::shared_ptr<HCameraHostManager::StatusCallback> statusCallback = std::make_shared<StatusCallbackDemo>();
84 sptr<HCameraHostManager> hostManager = new HCameraHostManager(statusCallback);
85 DumpPreconfigInfo(infoDumper, hostManager);
86 }
87
Test()88 void Test()
89 {
90 HCameraPreconfigFuzzer::HCameraPreconfigFuzzTest1();
91 }
92
93 typedef void (*TestFuncs[1])();
94
95 TestFuncs g_testFuncs = {
96 Test,
97 };
98
FuzzTest(const uint8_t * rawData,size_t size)99 bool FuzzTest(const uint8_t* rawData, size_t size)
100 {
101 // initialize data
102 RAW_DATA = rawData;
103 g_dataSize = size;
104 g_pos = 0;
105
106 uint32_t code = GetData<uint32_t>();
107 uint32_t len = GetArrLength(g_testFuncs);
108 if (len > 0) {
109 g_testFuncs[code % len]();
110 } else {
111 MEDIA_INFO_LOG("%{public}s: The len length is equal to 0", __func__);
112 }
113
114 return true;
115 }
116 } // namespace CameraStandard
117 } // namespace OHOS
118
119 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(uint8_t * data,size_t size)120 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size)
121 {
122 if (size < OHOS::CameraStandard::THRESHOLD) {
123 return 0;
124 }
125
126 OHOS::CameraStandard::FuzzTest(data, size);
127 return 0;
128 }