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