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 "reader_fuzzer.h"
17 #include "message_parcel.h"
18 #include "ipc_file_descriptor.h"
19 #include "foundation/multimedia/camera_framework/common/utils/camera_log.h"
20 #include "securec.h"
21 #include <memory>
22
23 namespace OHOS {
24 namespace CameraStandard {
25 using namespace DeferredProcessing;
26 static constexpr int32_t MAX_CODE_LEN = 512;
27 static constexpr int32_t MIN_SIZE_NUM = 4;
28 static const uint8_t* RAW_DATA = nullptr;
29 const size_t THRESHOLD = 10;
30 static size_t g_dataSize = 0;
31 static size_t g_pos;
32
33 std::shared_ptr<Reader> ReaderFuzzer::fuzz_{nullptr};
34
35 /*
36 * describe: get data from outside untrusted data(g_data) which size is according to sizeof(T)
37 * tips: only support basic type
38 */
39 template<class T>
GetData()40 T GetData()
41 {
42 T object {};
43 size_t objectSize = sizeof(object);
44 if (RAW_DATA == nullptr || objectSize > g_dataSize - g_pos) {
45 return object;
46 }
47 errno_t ret = memcpy_s(&object, objectSize, RAW_DATA + g_pos, objectSize);
48 if (ret != EOK) {
49 return {};
50 }
51 g_pos += objectSize;
52 return object;
53 }
54
55 template<class T>
GetArrLength(T & arr)56 uint32_t GetArrLength(T& arr)
57 {
58 if (arr == nullptr) {
59 MEDIA_INFO_LOG("%{public}s: The array length is equal to 0", __func__);
60 return 0;
61 }
62 return sizeof(arr) / sizeof(arr[0]);
63 }
64
ReaderFuzzTest()65 void ReaderFuzzer::ReaderFuzzTest()
66 {
67 if ((RAW_DATA == nullptr) || (g_dataSize > MAX_CODE_LEN) || (g_dataSize < MIN_SIZE_NUM)) {
68 return;
69 }
70 fuzz_ = std::make_shared<Reader>();
71 CHECK_ERROR_RETURN_LOG(!fuzz_, "Create fuzz_ Error");
72 int32_t inputFd = GetData<int32_t>();
73 fuzz_->Create(inputFd);
74 fuzz_->GetSourceFormat();
75 Format sourceFormat;
76 fuzz_->sourceFormat_ = std::make_shared<Format>(sourceFormat);
77 fuzz_->InitTracksAndDemuxer();
78 auto mediaInfo = std::make_shared<MediaInfo>();
79 fuzz_->GetMediaInfo(mediaInfo);
80 fuzz_->GetSourceMediaInfo(mediaInfo);
81
82 int32_t trackType = GetData<int32_t>();
83 int32_t trackIndex = GetData<int32_t>();
84 TrackFormat formatOfIndex;
85 Format trackFormat;
86 trackFormat.GetIntValue(Media::Tag::MEDIA_TYPE, trackType);
87 formatOfIndex.format = std::make_shared<Format>(trackFormat);
88 formatOfIndex.trackId = trackIndex;
89 fuzz_->GetTrackMediaInfo(formatOfIndex, mediaInfo);
90 }
91
Test()92 void Test()
93 {
94 auto reader = std::make_unique<ReaderFuzzer>();
95 if (reader == nullptr) {
96 MEDIA_INFO_LOG("mpegManager is null");
97 return;
98 }
99 reader->ReaderFuzzTest();
100 }
101
102 typedef void (*TestFuncs[1])();
103
104 TestFuncs g_testFuncs = {
105 Test,
106 };
107
FuzzTest(const uint8_t * rawData,size_t size)108 bool FuzzTest(const uint8_t* rawData, size_t size)
109 {
110 // initialize data
111 RAW_DATA = rawData;
112 g_dataSize = size;
113 g_pos = 0;
114
115 uint32_t code = GetData<uint32_t>();
116 uint32_t len = GetArrLength(g_testFuncs);
117 if (len > 0) {
118 g_testFuncs[code % len]();
119 } else {
120 MEDIA_INFO_LOG("%{public}s: The len length is equal to 0", __func__);
121 }
122
123 return true;
124 }
125 } // namespace CameraStandard
126 } // namespace OHOS
127
128 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(uint8_t * data,size_t size)129 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size)
130 {
131 if (size < OHOS::CameraStandard::THRESHOLD) {
132 return 0;
133 }
134
135 OHOS::CameraStandard::FuzzTest(data, size);
136 return 0;
137 }