1 /*
2 * Copyright (c) 2022-2022 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 "datachannelstub_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "global.h"
22 #include "input_data_channel_service_impl.h"
23 #include "message_parcel.h"
24
25 using namespace OHOS::MiscServices;
26 namespace OHOS {
27 constexpr size_t THRESHOLD = 10;
28 constexpr int32_t OFFSET = 4;
29 const std::u16string DATACHANNEL_INTERFACE_TOKEN = u"OHOS.MiscServices.IInputDataChannel";
30 constexpr uint32_t CODE_MIN = 0;
31 constexpr uint32_t CODE_MAX = static_cast<uint32_t>(IInputDataChannelIpcCode::COMMAND_SEND_MESSAGE) + 1;
ConvertToUint32(const uint8_t * ptr)32 uint32_t ConvertToUint32(const uint8_t *ptr)
33 {
34 if (ptr == nullptr) {
35 return 0;
36 }
37 uint32_t bigVar = (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
38 return bigVar;
39 }
40
FuzzDataChannelStub(const uint8_t * rawData,size_t size)41 bool FuzzDataChannelStub(const uint8_t *rawData, size_t size)
42 {
43 uint32_t code = static_cast<uint32_t>(*rawData) % (CODE_MAX - CODE_MIN + 1) + CODE_MIN;
44 rawData = rawData + OFFSET;
45 size = size - OFFSET;
46
47 MessageParcel data;
48 data.WriteInterfaceToken(DATACHANNEL_INTERFACE_TOKEN);
49 data.WriteBuffer(rawData, size);
50 data.RewindRead(0);
51 MessageParcel reply;
52 MessageOption option;
53
54 sptr<InputDataChannelStub> channelStub = new InputDataChannelServiceImpl();
55 channelStub->OnRemoteRequest(code, data, reply, option);
56
57 return true;
58 }
59 } // namespace OHOS
60 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)61 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
62 {
63 if (size < OHOS::THRESHOLD) {
64 return 0;
65 }
66 /* Run your code on data */
67 OHOS::FuzzDataChannelStub(data, size);
68 return 0;
69 }