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_demuxer_fuzzer.h"
17 #include "message_parcel.h"
18 #include "camera_log.h"
19 #include "securec.h"
20
21 namespace OHOS {
22 namespace CameraStandard {
23 using namespace DeferredProcessing;
24 static constexpr int32_t MAX_CODE_LEN = 512;
25 static constexpr int32_t MIN_SIZE_NUM = 4;
26 static const uint8_t* RAW_DATA = nullptr;
27 const size_t THRESHOLD = 10;
28 static size_t g_dataSize = 0;
29 static size_t g_pos;
30
31 std::shared_ptr<Demuxer> CameraDemuxerFuzzer::fuzz_{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
CameraDemuxerFuzzTest()63 void CameraDemuxerFuzzer::CameraDemuxerFuzzTest()
64 {
65 if ((RAW_DATA == nullptr) || (g_dataSize > MAX_CODE_LEN) || (g_dataSize < MIN_SIZE_NUM)) {
66 return;
67 }
68
69 fuzz_ = std::make_shared<Demuxer>();
70 CHECK_ERROR_RETURN_LOG(!fuzz_, "Create fuzz_ Error");
71 std::shared_ptr<AVSourceTest> source = std::make_shared<AVSourceTest>();
72 std::map<Media::Plugins::MediaType, std::shared_ptr<Track>> tracks;
73 fuzz_->Create(source, tracks);
74
75 std::vector<uint8_t> memoryFlags = {
76 static_cast<uint8_t>(MemoryFlag::MEMORY_READ_ONLY),
77 static_cast<uint8_t>(MemoryFlag::MEMORY_WRITE_ONLY),
78 static_cast<uint8_t>(MemoryFlag::MEMORY_READ_WRITE)
79 };
80
81 uint8_t randomIndex = GetData<uint8_t>() % memoryFlags.size();
82 MemoryFlag selectedFlag = static_cast<MemoryFlag>(memoryFlags[randomIndex]);
83 std::shared_ptr<AVAllocator> avAllocator =
84 AVAllocatorFactory::CreateSharedAllocator(selectedFlag);
85 int32_t capacity = GetData<int32_t>();
86 if (capacity <= 0) {
87 MEDIA_INFO_LOG("Invalid capacity: %d", capacity);
88 return;
89 }
90 std::shared_ptr<AVBuffer> buffer = AVBuffer::CreateAVBuffer(avAllocator, capacity);
91
92 std::vector<Media::Plugins::MediaType> mediaTypes = {
93 Media::Plugins::MediaType::UNKNOWN,
94 Media::Plugins::MediaType::AUDIO,
95 Media::Plugins::MediaType::VIDEO,
96 Media::Plugins::MediaType::SUBTITLE,
97 Media::Plugins::MediaType::ATTACHMENT,
98 Media::Plugins::MediaType::DATA,
99 Media::Plugins::MediaType::TIMEDMETA
100 };
101
102 uint8_t mediaTypeIndex = GetData<uint8_t>() % mediaTypes.size();
103 Media::Plugins::MediaType selectedMediaType = mediaTypes[mediaTypeIndex];
104 fuzz_->ReadStream(selectedMediaType, buffer);
105 }
106
Test()107 void Test()
108 {
109 auto cameraDemuxer = std::make_unique<CameraDemuxerFuzzer>();
110 if (cameraDemuxer == nullptr) {
111 MEDIA_INFO_LOG("cameraDemuxer is null");
112 return;
113 }
114 cameraDemuxer->CameraDemuxerFuzzTest();
115 }
116
117 typedef void (*TestFuncs[1])();
118
119 TestFuncs g_testFuncs = {
120 Test,
121 };
122
FuzzTest(const uint8_t * rawData,size_t size)123 bool FuzzTest(const uint8_t* rawData, size_t size)
124 {
125 // initialize data
126 RAW_DATA = rawData;
127 g_dataSize = size;
128 g_pos = 0;
129
130 uint32_t code = GetData<uint32_t>();
131 uint32_t len = GetArrLength(g_testFuncs);
132 if (len > 0) {
133 g_testFuncs[code % len]();
134 } else {
135 MEDIA_INFO_LOG("%{public}s: The len length is equal to 0", __func__);
136 }
137
138 return true;
139 }
140 } // namespace CameraStandard
141 } // namespace OHOS
142
143 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(uint8_t * data,size_t size)144 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size)
145 {
146 if (size < OHOS::CameraStandard::THRESHOLD) {
147 return 0;
148 }
149
150 OHOS::CameraStandard::FuzzTest(data, size);
151 return 0;
152 }