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 "controlchannelstub_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "global.h"
22 #include "input_control_channel_stub.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 CONTROLCHANNEL_INTERFACE_TOKEN = u"ohos.miscservices.inputmethod.InputControlChannel";
30
ConvertToUint32(const uint8_t * ptr)31 uint32_t ConvertToUint32(const uint8_t *ptr)
32 {
33 if (ptr == nullptr) {
34 return 0;
35 }
36 uint32_t bigVar = (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
37 return bigVar;
38 }
FuzzControlChannel(const uint8_t * rawData,size_t size)39 bool FuzzControlChannel(const uint8_t *rawData, size_t size)
40 {
41 constexpr int32_t MAIN_USER_ID = 100;
42 uint32_t code = ConvertToUint32(rawData);
43 rawData = rawData + OFFSET;
44 size = size - OFFSET;
45
46 MessageParcel data;
47 data.WriteInterfaceToken(CONTROLCHANNEL_INTERFACE_TOKEN);
48 data.WriteBuffer(rawData, size);
49 data.RewindRead(0);
50 MessageParcel reply;
51 MessageOption option;
52
53 sptr<InputControlChannelStub> controlChannel = new InputControlChannelStub(MAIN_USER_ID);
54 controlChannel->OnRemoteRequest(code, data, reply, option);
55
56 return true;
57 }
58 } // namespace OHOS
59 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)60 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
61 {
62 if (size < OHOS::THRESHOLD) {
63 return 0;
64 }
65 /* Run your code on data */
66 OHOS::FuzzControlChannel(data, size);
67 return 0;
68 }