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 "startabilitybycall_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "ability_manager_client.h"
22 #include "ability_connect_callback_interface.h"
23 #include "ability_record.h"
24 #include "securec.h"
25
26 using namespace OHOS::AAFwk;
27 using namespace OHOS::AppExecFwk;
28
29 namespace OHOS {
30 namespace {
31 constexpr size_t U32_AT_SIZE = 4;
32 }
33 class AbilityConnectionFuzz : public IAbilityConnection {
34 public:
AbilityConnectionFuzz()35 explicit AbilityConnectionFuzz() {};
~AbilityConnectionFuzz()36 virtual ~AbilityConnectionFuzz() {};
OnAbilityConnectDone(const AppExecFwk::ElementName & element,const sptr<IRemoteObject> & remoteObject,int resultCode)37 void OnAbilityConnectDone(
38 const AppExecFwk::ElementName& element, const sptr<IRemoteObject>& remoteObject, int resultCode) override {};
OnAbilityDisconnectDone(const AppExecFwk::ElementName & element,int resultCode)39 void OnAbilityDisconnectDone(const AppExecFwk::ElementName& element, int resultCode) override {};
40 };
GetFuzzAbilityToken()41 sptr<Token> GetFuzzAbilityToken()
42 {
43 sptr<Token> token = nullptr;
44
45 AbilityRequest abilityRequest;
46 abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
47 abilityRequest.abilityInfo.name = "MainAbility";
48 abilityRequest.abilityInfo.type = AbilityType::SERVICE;
49 std::shared_ptr<AbilityRecord> abilityRecord = AbilityRecord::CreateAbilityRecord(abilityRequest);
50 if (abilityRecord) {
51 token = abilityRecord->GetToken();
52 }
53
54 return token;
55 }
GetU32Data(const char * ptr)56 uint32_t GetU32Data(const char* ptr)
57 {
58 // convert fuzz input data to an integer
59 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
60 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)61 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
62 {
63 auto abilitymgr = AbilityManagerClient::GetInstance();
64 if (!abilitymgr) {
65 return false;
66 }
67
68 // fuzz for want
69 Parcel wantParcel;
70 sptr<AbilityConnectionFuzz> connect;
71 Want* want = nullptr;
72 if (wantParcel.WriteBuffer(data, size)) {
73 want = Want::Unmarshalling(wantParcel);
74 if (want && connect) {
75 abilitymgr->StartAbilityByCall(*want, connect);
76 }
77 }
78 if (want) {
79 delete want;
80 want = nullptr;
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 }
119
120