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 "audio_encoder_fuzzer.h"
17 #include "message_parcel.h"
18 #include "securec.h"
19 #include "camera_log.h"
20
21 namespace OHOS {
22 namespace CameraStandard {
23 static constexpr int32_t MAX_CODE_LEN = 512;
24 static constexpr int32_t MIN_SIZE_NUM = 4;
25 static const uint8_t* RAW_DATA = nullptr;
26 const size_t THRESHOLD = 10;
27 static size_t g_dataSize = 0;
28 static size_t g_pos;
29 std::shared_ptr<AudioEncoder> AudioEncoderFuzzer::fuzz_{nullptr};
30
31 /*
32 * describe: get data from outside untrusted data(g_data) which size is according to sizeof(T)
33 * tips: only support basic type
34 */
35 template<class T>
GetData()36 T GetData()
37 {
38 T object {};
39 size_t objectSize = sizeof(object);
40 if (RAW_DATA == nullptr || objectSize > g_dataSize - g_pos) {
41 return object;
42 }
43 errno_t ret = memcpy_s(&object, objectSize, RAW_DATA + g_pos, objectSize);
44 if (ret != EOK) {
45 return {};
46 }
47 g_pos += objectSize;
48 return object;
49 }
50
51 template<class T>
GetArrLength(T & arr)52 uint32_t GetArrLength(T& arr)
53 {
54 if (arr == nullptr) {
55 MEDIA_INFO_LOG("%{public}s: The array length is equal to 0", __func__);
56 return 0;
57 }
58 return sizeof(arr) / sizeof(arr[0]);
59 }
60
AudioEncoderFuzzTest()61 void AudioEncoderFuzzer::AudioEncoderFuzzTest()
62 {
63 if ((RAW_DATA == nullptr) || (g_dataSize > MAX_CODE_LEN) || (g_dataSize < MIN_SIZE_NUM)) {
64 return;
65 }
66 fuzz_ = std::make_shared<AudioEncoder>();
67 CHECK_ERROR_RETURN_LOG(!fuzz_, "Create fuzz_ Error");
68 uint8_t randomNum = GetData<uint8_t>();
69 std::vector<std::string> testStrings = {"test1", "test2"};
70 std::string codecMime(testStrings[randomNum % testStrings.size()]);
71 fuzz_->Create(codecMime);
72 fuzz_->Config();
73 fuzz_->Start();
74 vector<sptr<AudioRecord>> audioRecords;
75 fuzz_->EncodeAudioBuffer(audioRecords);
76 fuzz_->Stop();
77 }
78
Test()79 void Test()
80 {
81 auto audioEncoder = std::make_unique<AudioEncoderFuzzer>();
82 if (audioEncoder == nullptr) {
83 MEDIA_INFO_LOG("audioEncoder is null");
84 return;
85 }
86 audioEncoder->AudioEncoderFuzzTest();
87 }
88
89 typedef void (*TestFuncs[1])();
90
91 TestFuncs g_testFuncs = {
92 Test,
93 };
94
FuzzTest(const uint8_t * rawData,size_t size)95 bool FuzzTest(const uint8_t* rawData, size_t size)
96 {
97 // initialize data
98 RAW_DATA = rawData;
99 g_dataSize = size;
100 g_pos = 0;
101
102 uint32_t code = GetData<uint32_t>();
103 uint32_t len = GetArrLength(g_testFuncs);
104 if (len > 0) {
105 g_testFuncs[code % len]();
106 } else {
107 MEDIA_INFO_LOG("%{public}s: The len length is equal to 0", __func__);
108 }
109
110 return true;
111 }
112 } // namespace CameraStandard
113 } // namespace OHOS
114
115 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(uint8_t * data,size_t size)116 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size)
117 {
118 if (size < OHOS::CameraStandard::THRESHOLD) {
119 return 0;
120 }
121
122 OHOS::CameraStandard::FuzzTest(data, size);
123 return 0;
124 }