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 "freeinstallabilityfromremote_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "ability_manager_client.h"
22 #include "ability_record.h"
23
24 using namespace OHOS::AAFwk;
25 using namespace OHOS::AppExecFwk;
26
27 namespace OHOS {
28 namespace {
29 constexpr size_t U32_AT_SIZE = 4;
30 }
GetFuzzAbilityToken()31 sptr<Token> GetFuzzAbilityToken()
32 {
33 sptr<Token> token = nullptr;
34
35 AbilityRequest abilityRequest;
36 abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
37 abilityRequest.abilityInfo.name = "MainAbility";
38 abilityRequest.abilityInfo.type = AbilityType::DATA;
39 std::shared_ptr<AbilityRecord> abilityRecord = AbilityRecord::CreateAbilityRecord(abilityRequest);
40 if (abilityRecord) {
41 token = abilityRecord->GetToken();
42 }
43
44 return token;
45 }
GetU32Data(const char * ptr)46 uint32_t GetU32Data(const char* ptr)
47 {
48 // convert fuzz input data to an integer
49 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
50 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)51 bool 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 int32_t userId = static_cast<int32_t>(GetU32Data(data));
69 int requestCode = static_cast<int>(GetU32Data(data));
70 if (wantParcel.WriteBuffer(data, size)) {
71 want = Want::Unmarshalling(wantParcel);
72 if (want) {
73 abilitymgr->FreeInstallAbilityFromRemote(*want, token, userId, requestCode);
74 }
75 }
76
77 if (want) {
78 delete want;
79 want = nullptr;
80 }
81
82 return true;
83 }
84 }
85
86 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)87 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
88 {
89 /* Run your code on data */
90 if (data == nullptr) {
91 std::cout << "invalid data" << std::endl;
92 return 0;
93 }
94
95 /* Validate the length of size */
96 if (size < OHOS::U32_AT_SIZE) {
97 return 0;
98 }
99
100 char* ch = static_cast<char*>(malloc(size + 1));
101 if (ch == nullptr) {
102 std::cout << "malloc failed." << std::endl;
103 return 0;
104 }
105
106 (void)memset_s(ch, size + 1, 0x00, size + 1);
107 if (memcpy_s(ch, size, data, size) != EOK) {
108 std::cout << "copy failed." << std::endl;
109 free(ch);
110 ch = nullptr;
111 return 0;
112 }
113
114 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
115 free(ch);
116 ch = nullptr;
117 return 0;
118 }