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