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 "bms_adapter_fuzzer.h"
17 #include "foundation/multimedia/camera_framework/common/utils/camera_log.h"
18 #include "message_parcel.h"
19 #include "system_ability_definition.h"
20 #include "securec.h"
21 #include "iservice_registry.h"
22 #include "token_setproc.h"
23 #include <cstddef>
24 #include <cstdint>
25 #include <memory>
26 #include <mutex>
27
28 namespace OHOS {
29 namespace CameraStandard {
30 using RemoveCallback = std::function<void()>;
31 static constexpr int32_t MAX_CODE_LEN = 512;
32 static constexpr int32_t MIN_SIZE_NUM = 4;
33 static const uint8_t* RAW_DATA = nullptr;
34 const size_t THRESHOLD = 10;
35 static size_t g_dataSize = 0;
36 static size_t g_pos;
37
38 std::shared_ptr<BmsAdapter> BmsAdapterFuzzer::fuzz_{nullptr};
39 std::shared_ptr<BmsSaListener> BmsSaListenerFuzzer::bmsfuzz_{nullptr};
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
Initialize()71 void BmsAdapterFuzzer::Initialize()
72 {
73 if ((RAW_DATA == nullptr) || (g_dataSize > MAX_CODE_LEN) || (g_dataSize < MIN_SIZE_NUM)) {
74 return;
75 }
76
77 fuzz_ = std::make_shared<BmsAdapter>();
78 CHECK_ERROR_RETURN_LOG(!fuzz_, "Create fuzz_ Error");
79
80 fuzz_->RegisterListener();
81 auto samgr = SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
82 if (samgr == nullptr) {
83 return;
84 }
85 sptr<IRemoteObject> object = samgr->GetSystemAbility(BUNDLE_MGR_SERVICE_SYS_ABILITY_ID);
86 if (object == nullptr) {
87 return;
88 }
89 sptr<OHOS::AppExecFwk::IBundleMgr> bms = iface_cast<OHOS::AppExecFwk::IBundleMgr>(object);
90 fuzz_->SetBms(bms);
91 }
92
BmsSaListenerFuzzTest()93 void BmsSaListenerFuzzer::BmsSaListenerFuzzTest()
94 {
95 if ((RAW_DATA == nullptr) || (g_dataSize > MAX_CODE_LEN) || (g_dataSize < MIN_SIZE_NUM)) {
96 return;
97 }
98
99 if (bmsfuzz_ == nullptr) {
100 auto bmsAdapterWptr = wptr<BmsAdapter>();
101 auto removeCallback = [bmsAdapterWptr]() {
102 auto adapter = bmsAdapterWptr.promote();
103 if (adapter) {
104 adapter->SetBms(nullptr);
105 }
106 };
107 bmsfuzz_ = std::make_shared<BmsSaListener>(removeCallback);
108 }
109 int32_t systemAbilityId = GetData<int32_t>();
110 uint8_t randomNum = GetData<uint8_t>();
111 std::vector<std::string> testStrings = {"test1", "test2"};
112 std::string deviceId(testStrings[randomNum % testStrings.size()]);
113 bmsfuzz_->OnAddSystemAbility(systemAbilityId, deviceId);
114 bmsfuzz_->OnRemoveSystemAbility(systemAbilityId, deviceId);
115 }
116
Test()117 void Test()
118 {
119 auto bmsSaListener = std::make_unique<BmsSaListenerFuzzer>();
120 auto bmsAdapterFuzzer = std::make_unique<BmsAdapterFuzzer>();
121 if (bmsSaListener == nullptr) {
122 MEDIA_INFO_LOG("bmsSaListener is null");
123 return;
124 }
125 if (bmsAdapterFuzzer == nullptr) {
126 MEDIA_INFO_LOG("bmsAdapterFuzzer is null");
127 return;
128 }
129 bmsSaListener->BmsSaListenerFuzzTest();
130 bmsAdapterFuzzer->Initialize();
131 }
132
133 typedef void (*TestFuncs[1])();
134
135 TestFuncs g_testFuncs = {
136 Test,
137 };
138
FuzzTest(const uint8_t * rawData,size_t size)139 bool FuzzTest(const uint8_t* rawData, size_t size)
140 {
141 // initialize data
142 RAW_DATA = rawData;
143 g_dataSize = size;
144 g_pos = 0;
145
146 uint32_t code = GetData<uint32_t>();
147 uint32_t len = GetArrLength(g_testFuncs);
148 if (len > 0) {
149 g_testFuncs[code % len]();
150 } else {
151 MEDIA_INFO_LOG("%{public}s: The len length is equal to 0", __func__);
152 }
153
154 return true;
155 }
156 } // namespace CameraStandard
157 } // namespace OHOS
158
159 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(uint8_t * data,size_t size)160 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size)
161 {
162 if (size < OHOS::CameraStandard::THRESHOLD) {
163 return 0;
164 }
165
166 OHOS::CameraStandard::FuzzTest(data, size);
167 return 0;
168 }