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 FOO_MAX_LEN = 1024;
33 constexpr size_t U32_AT_SIZE = 4;
34 }
35 namespace {
36 constexpr int INPUT_ZERO = 0;
37 constexpr int INPUT_ONE = 1;
38 constexpr int INPUT_THREE = 3;
39 constexpr uint8_t ENABLE = 2;
40 constexpr size_t OFFSET_ZERO = 24;
41 constexpr size_t OFFSET_ONE = 16;
42 constexpr size_t OFFSET_TWO = 8;
43 }
44
GetU32Data(const char * ptr)45 uint32_t GetU32Data(const char* ptr)
46 {
47 // convert fuzz input data to an integer
48 return (ptr[INPUT_ZERO] << OFFSET_ZERO) | (ptr[INPUT_ONE] << OFFSET_ONE) | (ptr[ENABLE] << OFFSET_TWO) |
49 ptr[INPUT_THREE];
50 }
51
GetFuzzAbilityToken()52 sptr<Token> GetFuzzAbilityToken()
53 {
54 sptr<Token> token = nullptr;
55 AbilityRequest abilityRequest;
56 abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
57 abilityRequest.abilityInfo.name = "MainAbility";
58 abilityRequest.abilityInfo.type = AbilityType::DATA;
59 std::shared_ptr<AbilityRecord> abilityRecord = AbilityRecord::CreateAbilityRecord(abilityRequest);
60 if (abilityRecord) {
61 token = abilityRecord->GetToken();
62 }
63 return token;
64 }
65
DoSomethingInterestingWithMyAPI(const char * data,size_t size)66 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
67 {
68 AppMgrClient* appMgrClient = new AppMgrClient();
69 if (!appMgrClient) {
70 return false;
71 }
72
73 sptr<IRemoteObject> token = GetFuzzAbilityToken();
74 if (!token) {
75 std::cout << "Get ability token failed." << std::endl;
76 return false;
77 }
78 sptr<IRemoteObject> preToken = GetFuzzAbilityToken();
79 if (!preToken) {
80 std::cout << "Get ability preToken failed." << std::endl;
81 return false;
82 }
83 AbilityInfo abilityInfo;
84 ApplicationInfo appInfo;
85
86 // fuzz for want
87 Parcel wantParcel;
88 Want* want = nullptr;
89 AbilityRuntime::LoadParam loadParam;
90 loadParam.abilityRecordId = static_cast<int32_t>(GetU32Data(data));
91 loadParam.token = token;
92 loadParam.preToken = preToken;
93 if (wantParcel.WriteBuffer(data, size)) {
94 want = Want::Unmarshalling(wantParcel);
95 if (want) {
96 appMgrClient->LoadAbility(abilityInfo, appInfo, *want, loadParam);
97 }
98 }
99
100 delete appMgrClient;
101 appMgrClient = nullptr;
102
103 return true;
104 }
105 }
106
107 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)108 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
109 {
110 /* Run your code on data */
111 if (data == nullptr) {
112 std::cout << "invalid data" << std::endl;
113 return 0;
114 }
115
116 /* Validate the length of size */
117 if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
118 return 0;
119 }
120
121 char* ch = static_cast<char*>(malloc(size + 1));
122 if (ch == nullptr) {
123 std::cout << "malloc failed." << std::endl;
124 return 0;
125 }
126
127 (void)memset_s(ch, size + 1, 0x00, size + 1);
128 if (memcpy_s(ch, size, data, size) != EOK) {
129 std::cout << "copy failed." << std::endl;
130 free(ch);
131 ch = nullptr;
132 return 0;
133 }
134
135 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
136 free(ch);
137 ch = nullptr;
138 return 0;
139 }
140
141