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 #include "transportmsghandle_fuzzer.h"
16
17 #include <cstddef>
18 #include <cstdint>
19 #include <memory>
20
21 #include "cloud_fuzzer_helper.h"
22 #include "message_handler.h"
23
24 namespace OHOS {
25 constexpr size_t U16_AT_SIZE = 2;
26 constexpr size_t U32_AT_SIZE = 4;
27 constexpr size_t U64_AT_SIZE = 8;
28 constexpr int SPLITE_SIZE = 3;
29
30 using namespace std;
31 using namespace OHOS::FileManagement::CloudSync;
32
DoSomethingInterestingWithMyAPI(const uint8_t * data,size_t size)33 bool DoSomethingInterestingWithMyAPI(const uint8_t *data, size_t size)
34 {
35 FuzzData fuzzData(data, size);
36 uint16_t msgType = fuzzData.GetData<uint16_t>();
37 int32_t errorCode = fuzzData.GetData<int32_t>();
38 int32_t userId = fuzzData.GetData<int32_t>();
39 uint64_t taskId = fuzzData.GetData<uint64_t>();
40 int len = static_cast<int>(fuzzData.GetRemainSize()) / SPLITE_SIZE;
41 if (len <= 0) {
42 return false;
43 }
44 std::string srcNetworkId = fuzzData.GetStringFromData(len);
45 std::string dstNetworkId = fuzzData.GetStringFromData(len);
46 std::string uri = fuzzData.GetStringFromData(len);
47 MessageInputInfo msgInputInfo = {.srcNetworkId = srcNetworkId,
48 .dstNetworkId = dstNetworkId,
49 .uri = uri,
50 .msgType = msgType,
51 .errorCode = errorCode,
52 .userId = userId,
53 .taskId = taskId};
54 MessageHandler msgHandle(msgInputInfo);
55 auto dataSubPtr = std::make_unique<uint8_t[]>(size);
56 msgHandle.PackData(dataSubPtr.get(), static_cast<uint32_t>(size));
57 MessageHandler msgHandleSub;
58 msgHandleSub.UnPackData(dataSubPtr.get(), msgHandle.GetDataSize());
59 msgHandleSub.GetTaskId();
60 msgHandleSub.GetMsgType();
61 msgHandleSub.GetUserId();
62 msgHandleSub.GetErrorCode();
63 msgHandleSub.GetUri();
64 msgHandleSub.GetSrcNetworkId();
65 msgHandleSub.GetDstNetworkId();
66 return true;
67 }
68 } // namespace OHOS
69
70 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)71 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
72 {
73 /* Run your code on data */
74 if (data == nullptr || size <= (OHOS::U16_AT_SIZE + OHOS::U64_AT_SIZE + (OHOS::U32_AT_SIZE << 1))) {
75 return 0;
76 }
77
78 OHOS::DoSomethingInterestingWithMyAPI(data, size);
79 return 0;
80 }
81