1 /*
2 * Copyright (c) 2022 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 FOO_MAX_LEN = 1024;
33 constexpr size_t U32_AT_SIZE = 4;
34 }
GetFuzzAbilityToken()35 sptr<Token> GetFuzzAbilityToken()
36 {
37 sptr<Token> token = nullptr;
38
39 AbilityRequest abilityRequest;
40 abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
41 abilityRequest.abilityInfo.name = "MainAbility";
42 abilityRequest.abilityInfo.type = AbilityType::DATA;
43 std::shared_ptr<AbilityRecord> abilityRecord = AbilityRecord::CreateAbilityRecord(abilityRequest);
44 if (abilityRecord) {
45 token = abilityRecord->GetToken();
46 }
47
48 return token;
49 }
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
59 sptr<Token> 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 if (wantParcel.WriteBuffer(data, size)) {
69 want = Want::Unmarshalling(wantParcel);
70 if (want) {
71 abilityMgr->StartContinuation(*want, token, 0);
72 abilityMgr->StartContinuation(*want, token, 1);
73 }
74 }
75
76 if (want) {
77 delete want;
78 want = nullptr;
79 }
80
81 return true;
82 }
83 }
84
85 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)86 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
87 {
88 /* Run your code on data */
89 if (data == nullptr) {
90 std::cout << "invalid data" << std::endl;
91 return 0;
92 }
93
94 /* Validate the length of size */
95 if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
96 return 0;
97 }
98
99 char* ch = (char *)malloc(size + 1);
100 if (ch == nullptr) {
101 std::cout << "malloc failed." << std::endl;
102 return 0;
103 }
104
105 (void)memset_s(ch, size + 1, 0x00, size + 1);
106 if (memcpy_s(ch, size, data, size) != EOK) {
107 std::cout << "copy failed." << std::endl;
108 free(ch);
109 ch = nullptr;
110 return 0;
111 }
112
113 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
114 free(ch);
115 ch = nullptr;
116 return 0;
117 }
118
119