1 /*
2 * Copyright (c) 2022 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 <iostream>
17 #include <cstddef>
18 #include <cstdint>
19 #include <memory>
20
21 #include "securec.h"
22 #include "avcontroller_callback_proxy.h"
23 #include "iavcontroller_callback.h"
24 #include "iremote_proxy.h"
25 #include "avsession_log.h"
26 #include "avsession_errors.h"
27 #include "avcontroller_callbackproxy_fuzzer.h"
28
29 using namespace std;
30 using namespace OHOS;
31 using namespace OHOS::AVSession;
32
33 static const int32_t MAX_CODE_TEST = 5;
34 static const int32_t MIN_SIZE_NUM = 10;
35 static const uint8_t *RAW_DATA = nullptr;
36 static size_t g_totalSize = 0;
37 static size_t g_sizePos;
38
39 namespace {
40 /*
41 * describe: get data from FUZZ untrusted data(RAW_DATA) which size is according to sizeof(T)
42 * tips: only support basic type
43 */
44 template<class T>
GetData()45 T GetData()
46 {
47 T object {};
48 size_t objectSize = sizeof(object);
49 if (RAW_DATA == nullptr || objectSize > g_totalSize - g_sizePos) {
50 return object;
51 }
52 errno_t ret = memcpy_s(&object, objectSize, RAW_DATA + g_sizePos, objectSize);
53 if (ret != EOK) {
54 return {};
55 }
56 g_sizePos += objectSize;
57 return object;
58 }
59
60 template<class T>
GetArrLength(T & arr)61 uint32_t GetArrLength(T& arr)
62 {
63 if (arr == nullptr) {
64 SLOGE("%{public}s: The array length is equal to 0", __func__);
65 return 0;
66 }
67 return sizeof(arr) / sizeof(arr[0]);
68 }
69
70 typedef void (*TestFuncs[1])();
71
72 TestFuncs g_allFuncs = {
73 AVControllerCallbackProxySendRequest
74 };
75
FuzzTest(const uint8_t * rawData,size_t size)76 bool FuzzTest(const uint8_t* rawData, size_t size)
77 {
78 if (rawData == nullptr) {
79 return false;
80 }
81
82 // initialize data
83 RAW_DATA = rawData;
84 g_totalSize = size;
85 g_sizePos = 0;
86
87 uint32_t code = GetData<uint32_t>();
88 uint32_t len = GetArrLength(g_allFuncs);
89 if (len > 0) {
90 g_allFuncs[code % len]();
91 } else {
92 SLOGE("%{public}s: The len length is equal to 0", __func__);
93 }
94
95 return true;
96 }
97 }
98
FuzzSendRequest()99 bool AvControllerCallbackProxyFuzzer::FuzzSendRequest()
100 {
101 uint32_t cmdCode = GetData<uint32_t>();
102 if (cmdCode >= MAX_CODE_TEST) {
103 return false;
104 }
105
106 sptr<IRemoteObject> remoteObject = nullptr;
107 std::shared_ptr<AVControllerCallbackProxyFuzzerTest> avControllerCallbackProxy =
108 std::make_shared<AVControllerCallbackProxyFuzzerTest>(remoteObject);
109
110 if (!avControllerCallbackProxy) {
111 return false;
112 }
113 MessageParcel parcel;
114 CHECK_AND_PRINT_LOG(parcel.WriteInterfaceToken(avControllerCallbackProxy->GetDescriptor()),
115 "write interface token failed");
116
117 MessageParcel reply;
118 MessageOption option { MessageOption::TF_ASYNC };
119 auto remote = avControllerCallbackProxy->GetRemote();
120 if (remote == nullptr) {
121 SLOGD("remote is null");
122 return false;
123 }
124 parcel.WriteBuffer(RAW_DATA, g_sizePos);
125 g_sizePos += sizeof(uint32_t);
126 parcel.RewindRead(0);
127 int32_t result = AVSESSION_ERROR;
128 CHECK_AND_PRINT_LOG(remote != nullptr, "get remote service failed");
129 CHECK_AND_PRINT_LOG((result = remote->SendRequest(cmdCode, parcel, reply, option)) == 0,
130 "send request failed");
131 return result == AVSESSION_SUCCESS;
132 }
133
AVControllerCallbackProxySendRequest()134 void OHOS::AVSession::AVControllerCallbackProxySendRequest()
135 {
136 auto avControllerCallbackProxy = std::make_unique<AvControllerCallbackProxyFuzzer>();
137 if (avControllerCallbackProxy == nullptr) {
138 return;
139 }
140 avControllerCallbackProxy->FuzzSendRequest();
141 }
142
143 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)144 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
145 {
146 if (size < MIN_SIZE_NUM) {
147 return 0;
148 }
149 /* Run your code on data */
150 FuzzTest(data, size);
151 return 0;
152 }
153
154