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 FOO_MAX_LEN = 1024;
30 constexpr size_t U32_AT_SIZE = 4;
31 }
GetFuzzAbilityToken()32 sptr<Token> GetFuzzAbilityToken()
33 {
34 sptr<Token> token = nullptr;
35
36 AbilityRequest abilityRequest;
37 abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
38 abilityRequest.abilityInfo.name = "MainAbility";
39 abilityRequest.abilityInfo.type = AbilityType::DATA;
40 std::shared_ptr<AbilityRecord> abilityRecord = AbilityRecord::CreateAbilityRecord(abilityRequest);
41 if (abilityRecord) {
42 token = abilityRecord->GetToken();
43 }
44
45 return token;
46 }
GetU32Data(const char * ptr)47 uint32_t GetU32Data(const char* ptr)
48 {
49 // convert fuzz input data to an integer
50 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
51 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)52 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
53 {
54 auto abilitymgr = AbilityManagerClient::GetInstance();
55 if (!abilitymgr) {
56 return false;
57 }
58
59 // get token and connectCallback
60 sptr<IRemoteObject> token = GetFuzzAbilityToken();
61 if (!token) {
62 std::cout << "Get ability token failed." << std::endl;
63 return false;
64 }
65
66 // fuzz for want
67 Parcel wantParcel;
68 Want* want = nullptr;
69 int32_t userId = static_cast<int32_t>(GetU32Data(data));
70 int requestCode = static_cast<int>(GetU32Data(data));
71 if (wantParcel.WriteBuffer(data, size)) {
72 want = Want::Unmarshalling(wantParcel);
73 if (want) {
74 abilitymgr->FreeInstallAbilityFromRemote(*want, token, userId, requestCode);
75 }
76 }
77
78 if (want) {
79 delete want;
80 want = nullptr;
81 }
82
83 return true;
84 }
85 }
86
87 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)88 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
89 {
90 /* Run your code on data */
91 if (data == nullptr) {
92 std::cout << "invalid data" << std::endl;
93 return 0;
94 }
95
96 /* Validate the length of size */
97 if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
98 return 0;
99 }
100
101 char* ch = static_cast<char*>(malloc(size + 1));
102 if (ch == nullptr) {
103 std::cout << "malloc failed." << std::endl;
104 return 0;
105 }
106
107 (void)memset_s(ch, size + 1, 0x00, size + 1);
108 if (memcpy_s(ch, size, data, size) != EOK) {
109 std::cout << "copy failed." << std::endl;
110 free(ch);
111 ch = nullptr;
112 return 0;
113 }
114
115 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
116 free(ch);
117 ch = nullptr;
118 return 0;
119 }