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