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 "startability_fuzzer.h"
17
18#include <cstddef>
19#include <cstdint>
20
21#include "ability_manager_client.h"
22#include "ability_record.h"
23#include "parcel.h"
24#include "securec.h"
25#include "want.h"
26
27using namespace OHOS::AAFwk;
28using namespace OHOS::AppExecFwk;
29
30namespace OHOS {
31namespace {
32constexpr size_t FOO_MAX_LEN = 1024;
33constexpr size_t U32_AT_SIZE = 4;
34}
35sptr<Token> GetFuzzAbilityToken()
36{
37    sptr<Token> token = nullptr;
38
39    AbilityRequest abilityRequest;
40    abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
41    abilityRequest.abilityInfo.name = "MainAbility";
42    abilityRequest.abilityInfo.type = AbilityType::DATA;
43    std::shared_ptr<AbilityRecord> abilityRecord = AbilityRecord::CreateAbilityRecord(abilityRequest);
44    if (abilityRecord) {
45        token = abilityRecord->GetToken();
46    }
47
48    return token;
49}
50
51bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
52{
53    auto abilityMgr = AbilityManagerClient::GetInstance();
54    if (!abilityMgr) {
55        return false;
56    }
57
58    // get token and connectCallback
59    sptr<IRemoteObject> token = GetFuzzAbilityToken();
60    if (!token) {
61        std::cout << "Get ability token failed." << std::endl;
62        return false;
63    }
64
65    // fuzz for want
66    Parcel wantParcel;
67    Want* want = nullptr;
68    if (wantParcel.WriteBuffer(data, size)) {
69        want = Want::Unmarshalling(wantParcel);
70        if (want) {
71            abilityMgr->StartAbility(*want);
72        }
73    }
74
75    // fuzz for abilitysetting
76    Parcel settingParcel;
77    AbilityStartSetting* setting = nullptr;
78    if (settingParcel.WriteBuffer(data, size)) {
79        setting = AbilityStartSetting::Unmarshalling(settingParcel);
80        if (want && setting) {
81            abilityMgr->StartAbility(*want, *setting, token);
82        }
83    }
84
85    // fuzz for startoptions
86    Parcel optionParcel;
87    StartOptions* options = nullptr;
88    if (optionParcel.WriteBuffer(data, size)) {
89        options = StartOptions::Unmarshalling(optionParcel);
90        if (want && options) {
91            abilityMgr->StartAbility(*want, *options, token);
92        }
93    }
94
95    if (want) {
96        delete want;
97        want = nullptr;
98    }
99    if (setting) {
100        delete setting;
101        setting = nullptr;
102    }
103    if (options) {
104        delete options;
105        options = nullptr;
106    }
107
108    return true;
109}
110}
111
112/* Fuzzer entry point */
113extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
114{
115    /* Run your code on data */
116    if (data == nullptr) {
117        std::cout << "invalid data" << std::endl;
118        return 0;
119    }
120
121    /* Validate the length of size */
122    if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
123        return 0;
124    }
125
126    char* ch = (char*)malloc(size + 1);
127    if (ch == nullptr) {
128        std::cout << "malloc failed." << std::endl;
129        return 0;
130    }
131
132    (void)memset_s(ch, size + 1, 0x00, size + 1);
133    if (memcpy_s(ch, size, data, size) != EOK) {
134        std::cout << "copy failed." << std::endl;
135        free(ch);
136        ch = nullptr;
137        return 0;
138    }
139
140    OHOS::DoSomethingInterestingWithMyAPI(ch, size);
141    free(ch);
142    ch = nullptr;
143    return 0;
144}
145
146