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_ability_fuzzer.h"
17 #include "camera_log.h"
18 #include "message_parcel.h"
19 #include "securec.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
27 namespace OHOS {
28 namespace CameraStandard {
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 const int32_t NUM_TWO = 2;
37 std::shared_ptr<CameraAbility> CameraAbilityFuzzer::fuzz_{nullptr};
38
39 /*
40 * describe: get data from outside untrusted data(g_data) which size is according to sizeof(T)
41 * tips: only support basic type
42 */
43 template<class T>
GetData()44 T GetData()
45 {
46 T object {};
47 size_t objectSize = sizeof(object);
48 if (RAW_DATA == nullptr || objectSize > g_dataSize - g_pos) {
49 return object;
50 }
51 errno_t ret = memcpy_s(&object, objectSize, RAW_DATA + g_pos, objectSize);
52 if (ret != EOK) {
53 return {};
54 }
55 g_pos += objectSize;
56 return object;
57 }
58
59 template<class T>
GetArrLength(T & arr)60 uint32_t GetArrLength(T& arr)
61 {
62 if (arr == nullptr) {
63 MEDIA_INFO_LOG("%{public}s: The array length is equal to 0", __func__);
64 return 0;
65 }
66 return sizeof(arr) / sizeof(arr[0]);
67 }
68
GetPermission()69 void GetPermission()
70 {
71 uint64_t tokenId;
72 const char* perms[2];
73 perms[0] = "ohos.permission.DISTRIBUTED_DATASYNC";
74 perms[1] = "ohos.permission.CAMERA";
75 NativeTokenInfoParams infoInstance = {
76 .dcapsNum = 0,
77 .permsNum = 2,
78 .aclsNum = 0,
79 .dcaps = NULL,
80 .perms = perms,
81 .acls = NULL,
82 .processName = "native_camera_tdd",
83 .aplStr = "system_basic",
84 };
85 tokenId = GetAccessTokenId(&infoInstance);
86 SetSelfTokenID(tokenId);
87 OHOS::Security::AccessToken::AccessTokenKit::ReloadNativeTokenInfo();
88 }
89
CameraAbilityFuzzTest()90 void CameraAbilityFuzzer::CameraAbilityFuzzTest()
91 {
92 if ((RAW_DATA == nullptr) || (g_dataSize > MAX_CODE_LEN) || (g_dataSize < MIN_SIZE_NUM)) {
93 return;
94 }
95
96 GetPermission();
97 fuzz_ = std::make_shared<CameraAbility>();
98 CHECK_ERROR_RETURN_LOG(!fuzz_, "Create fuzz_ Error");
99 fuzz_->HasFlash();
100 FlashMode flashMode = static_cast<FlashMode>(
101 GetData<int32_t>() % (FlashMode::FLASH_MODE_ALWAYS_OPEN + NUM_TWO));
102 fuzz_->IsFlashModeSupported(flashMode);
103 fuzz_->GetSupportedFlashModes();
104 ExposureMode exposureMode = static_cast<ExposureMode>(
105 GetData<int32_t>() % (ExposureMode::EXPOSURE_MODE_CONTINUOUS_AUTO + NUM_TWO));
106 fuzz_->IsExposureModeSupported(exposureMode);
107 fuzz_->GetSupportedExposureModes();
108 fuzz_->GetExposureBiasRange();
109 fuzz_->GetSupportedFocusModes();
110 FocusMode focusMode = static_cast<FocusMode>(
111 GetData<int32_t>() % (FocusMode::FOCUS_MODE_LOCKED + NUM_TWO));
112 fuzz_->IsFocusModeSupported(focusMode);
113 fuzz_->GetZoomRatioRange();
114 fuzz_->GetSupportedBeautyTypes();
115 BeautyType beautyType = static_cast<BeautyType>(
116 GetData<int32_t>() % (BeautyType::SKIN_TONE + NUM_TWO));
117 fuzz_->GetSupportedBeautyRange(beautyType);
118 fuzz_->GetSupportedColorEffects();
119 fuzz_->GetSupportedColorSpaces();
120 fuzz_->IsMacroSupported();
121 fuzz_->GetSupportedPortraitEffects();
122 fuzz_->GetSupportedVirtualApertures();
123 fuzz_->GetSupportedPhysicalApertures();
124 fuzz_->GetSupportedStabilizationMode();
125 VideoStabilizationMode stabilizationMode = static_cast<VideoStabilizationMode>(
126 GetData<int32_t>() % (VideoStabilizationMode::AUTO + NUM_TWO));
127 fuzz_->IsVideoStabilizationModeSupported(stabilizationMode);
128 fuzz_->GetSupportedExposureRange();
129 SceneFeature feature = static_cast<SceneFeature>(
130 GetData<int32_t>() % (SceneFeature::FEATURE_ENUM_MAX + NUM_TWO));
131 fuzz_->IsFeatureSupported(feature);
132 fuzz_->IsLcdFlashSupported();
133 }
134
Test()135 void Test()
136 {
137 auto cameraAbility = std::make_unique<CameraAbilityFuzzer>();
138 if (cameraAbility == nullptr) {
139 MEDIA_INFO_LOG("cameraAbility is null");
140 return;
141 }
142 cameraAbility->CameraAbilityFuzzTest();
143 }
144
145 typedef void (*TestFuncs[1])();
146
147 TestFuncs g_testFuncs = {
148 Test,
149 };
150
FuzzTest(const uint8_t * rawData,size_t size)151 bool FuzzTest(const uint8_t* rawData, size_t size)
152 {
153 // initialize data
154 RAW_DATA = rawData;
155 g_dataSize = size;
156 g_pos = 0;
157
158 uint32_t code = GetData<uint32_t>();
159 uint32_t len = GetArrLength(g_testFuncs);
160 if (len > 0) {
161 g_testFuncs[code % len]();
162 } else {
163 MEDIA_INFO_LOG("%{public}s: The len length is equal to 0", __func__);
164 }
165
166 return true;
167 }
168 } // namespace CameraStandard
169 } // namespace OHOS
170
171 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(uint8_t * data,size_t size)172 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size)
173 {
174 if (size < OHOS::CameraStandard::THRESHOLD) {
175 return 0;
176 }
177
178 OHOS::CameraStandard::FuzzTest(data, size);
179 return 0;
180 }