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 "loadability_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "ability_record.h"
22 #include "app_mgr_client.h"
23 #include "param.h"
24 #include "parcel.h"
25 #include "securec.h"
26
27 using namespace OHOS::AAFwk;
28 using namespace OHOS::AppExecFwk;
29
30 namespace OHOS {
31 namespace {
32 constexpr size_t U32_AT_SIZE = 4;
33 }
34 namespace {
35 constexpr int INPUT_ZERO = 0;
36 constexpr int INPUT_ONE = 1;
37 constexpr int INPUT_THREE = 3;
38 constexpr uint8_t ENABLE = 2;
39 constexpr size_t OFFSET_ZERO = 24;
40 constexpr size_t OFFSET_ONE = 16;
41 constexpr size_t OFFSET_TWO = 8;
42 }
43
GetU32Data(const char * ptr)44 uint32_t GetU32Data(const char* ptr)
45 {
46 // convert fuzz input data to an integer
47 return (ptr[INPUT_ZERO] << OFFSET_ZERO) | (ptr[INPUT_ONE] << OFFSET_ONE) | (ptr[ENABLE] << OFFSET_TWO) |
48 ptr[INPUT_THREE];
49 }
50
GetFuzzAbilityToken()51 sptr<Token> GetFuzzAbilityToken()
52 {
53 sptr<Token> token = nullptr;
54 AbilityRequest abilityRequest;
55 abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
56 abilityRequest.abilityInfo.name = "MainAbility";
57 abilityRequest.abilityInfo.type = AbilityType::DATA;
58 std::shared_ptr<AbilityRecord> abilityRecord = AbilityRecord::CreateAbilityRecord(abilityRequest);
59 if (abilityRecord) {
60 token = abilityRecord->GetToken();
61 }
62 return token;
63 }
64
DoSomethingInterestingWithMyAPI(const char * data,size_t size)65 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
66 {
67 AppMgrClient* appMgrClient = new AppMgrClient();
68 if (!appMgrClient) {
69 return false;
70 }
71
72 sptr<IRemoteObject> token = GetFuzzAbilityToken();
73 if (!token) {
74 std::cout << "Get ability token failed." << std::endl;
75 return false;
76 }
77 sptr<IRemoteObject> preToken = GetFuzzAbilityToken();
78 if (!preToken) {
79 std::cout << "Get ability preToken failed." << std::endl;
80 return false;
81 }
82 AbilityInfo abilityInfo;
83 ApplicationInfo appInfo;
84
85 // fuzz for want
86 Parcel wantParcel;
87 Want* want = nullptr;
88 AbilityRuntime::LoadParam loadParam;
89 loadParam.abilityRecordId = static_cast<int32_t>(GetU32Data(data));
90 loadParam.token = token;
91 loadParam.preToken = preToken;
92 if (wantParcel.WriteBuffer(data, size)) {
93 want = Want::Unmarshalling(wantParcel);
94 if (want) {
95 appMgrClient->LoadAbility(abilityInfo, appInfo, *want, loadParam);
96 }
97 }
98
99 delete appMgrClient;
100 appMgrClient = nullptr;
101
102 return true;
103 }
104 }
105
106 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)107 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
108 {
109 /* Run your code on data */
110 if (data == nullptr) {
111 std::cout << "invalid data" << std::endl;
112 return 0;
113 }
114
115 /* Validate the length of size */
116 if (size < OHOS::U32_AT_SIZE) {
117 return 0;
118 }
119
120 char* ch = static_cast<char*>(malloc(size + 1));
121 if (ch == nullptr) {
122 std::cout << "malloc failed." << std::endl;
123 return 0;
124 }
125
126 (void)memset_s(ch, size + 1, 0x00, size + 1);
127 if (memcpy_s(ch, size, data, size) != EOK) {
128 std::cout << "copy failed." << std::endl;
129 free(ch);
130 ch = nullptr;
131 return 0;
132 }
133
134 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
135 free(ch);
136 ch = nullptr;
137 return 0;
138 }
139
140