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
16#include "testobserverstub_fuzzer.h"
17
18#include <cstddef>
19#include <cstdint>
20
21#define private public
22#include "test_observer_stub.h"
23#include "test_observer.h"
24#undef private
25
26#include "ability_record.h"
27
28using namespace OHOS::AAFwk;
29using namespace OHOS::AppExecFwk;
30
31namespace OHOS {
32namespace {
33constexpr int INPUT_ZERO = 0;
34constexpr int INPUT_ONE = 1;
35constexpr int INPUT_TWO = 2;
36constexpr int INPUT_THREE = 3;
37constexpr size_t FOO_MAX_LEN = 1024;
38constexpr size_t U32_AT_SIZE = 4;
39constexpr size_t OFFSET_ZERO = 24;
40constexpr size_t OFFSET_ONE = 16;
41constexpr size_t OFFSET_TWO = 8;
42constexpr uint8_t ENABLE = 2;
43} // namespace
44
45const std::u16string APPMGR_INTERFACE_TOKEN = u"ohos.aafwk.AppManager";
46uint32_t GetU32Data(const char* ptr)
47{
48    // convert fuzz input data to an integer
49    return (ptr[INPUT_ZERO] << OFFSET_ZERO) | (ptr[INPUT_ONE] << OFFSET_ONE) | (ptr[INPUT_TWO] << OFFSET_TWO) |
50        ptr[INPUT_THREE];
51}
52
53bool DoSomethingInterestingWithMyAPI(const char *data, size_t size)
54{
55    auto testObserverStub = std::make_shared<TestObserver>();
56    MessageParcel ParcelData;
57    ParcelData.WriteInterfaceToken(APPMGR_INTERFACE_TOKEN);
58    ParcelData.WriteBuffer(data, size);
59    ParcelData.RewindRead(0);
60    MessageParcel reply;
61    MessageOption option;
62    uint32_t code = static_cast<uint32_t>(GetU32Data(data));
63    testObserverStub->OnRemoteRequest(code, ParcelData, reply, option);
64
65    return true;
66}
67} // namespace OHOS
68
69/* Fuzzer entry point */
70extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
71{
72    /* Run your code on data */
73    if (data == nullptr) {
74        std::cout << "invalid data" << std::endl;
75        return 0;
76    }
77
78    /* Validate the length of size */
79    if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
80        return 0;
81    }
82
83    char *ch = (char *)malloc(size + 1);
84    if (ch == nullptr) {
85        std::cout << "malloc failed." << std::endl;
86        return 0;
87    }
88
89    (void)memset_s(ch, size + 1, 0x00, size + 1);
90    if (memcpy_s(ch, size + 1, data, size) != EOK) {
91        std::cout << "copy failed." << std::endl;
92        free(ch);
93        ch = nullptr;
94        return 0;
95    }
96
97    OHOS::DoSomethingInterestingWithMyAPI(ch, size);
98    free(ch);
99    ch = nullptr;
100    return 0;
101}