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 "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 FOO_MAX_LEN = 1024;
32 constexpr size_t U32_AT_SIZE = 4;
33 }
34 class AbilityConnectionFuzz : public IAbilityConnection {
35 public:
AbilityConnectionFuzz()36 explicit AbilityConnectionFuzz() {};
~AbilityConnectionFuzz()37 virtual ~AbilityConnectionFuzz() {};
OnAbilityConnectDone(const AppExecFwk::ElementName & element,const sptr<IRemoteObject> & remoteObject,int resultCode)38 void OnAbilityConnectDone(
39 const AppExecFwk::ElementName &element, const sptr<IRemoteObject> &remoteObject, int resultCode) override {};
OnAbilityDisconnectDone(const AppExecFwk::ElementName & element,int resultCode)40 void OnAbilityDisconnectDone(const AppExecFwk::ElementName &element, int resultCode) override {};
41 };
GetFuzzAbilityToken()42 sptr<Token> GetFuzzAbilityToken()
43 {
44 sptr<Token> token = nullptr;
45
46 AbilityRequest abilityRequest;
47 abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
48 abilityRequest.abilityInfo.name = "MainAbility";
49 abilityRequest.abilityInfo.type = AbilityType::SERVICE;
50 std::shared_ptr<AbilityRecord> abilityRecord = AbilityRecord::CreateAbilityRecord(abilityRequest);
51 if (abilityRecord) {
52 token = abilityRecord->GetToken();
53 }
54
55 return token;
56 }
GetU32Data(const char * ptr)57 uint32_t GetU32Data(const char* ptr)
58 {
59 // convert fuzz input data to an integer
60 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
61 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)62 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
63 {
64 auto abilitymgr = AbilityManagerClient::GetInstance();
65 if (!abilitymgr) {
66 return false;
67 }
68
69 // fuzz for want
70 Parcel wantParcel;
71 sptr<AbilityConnectionFuzz> connect;
72 Want *want = nullptr;
73 if (wantParcel.WriteBuffer(data, size)) {
74 want = Want::Unmarshalling(wantParcel);
75 if (want && connect) {
76 abilitymgr->StartAbilityByCall(*want, connect);
77 }
78 }
79
80 // get token and connectCallback
81 sptr<IRemoteObject> token = GetFuzzAbilityToken();
82 if (token) {
83 abilitymgr->StartAbilityByCall(*want, connect, token);
84 }
85
86 return true;
87 }
88 }
89
90 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)91 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
92 {
93 /* Run your code on data */
94 if (data == nullptr) {
95 std::cout << "invalid data" << std::endl;
96 return 0;
97 }
98
99 /* Validate the length of size */
100 if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
101 return 0;
102 }
103
104 char* ch = (char *)malloc(size + 1);
105 if (ch == nullptr) {
106 std::cout << "malloc failed." << std::endl;
107 return 0;
108 }
109
110 (void)memset_s(ch, size + 1, 0x00, size + 1);
111 if (memcpy_s(ch, size, data, size) != EOK) {
112 std::cout << "copy failed." << std::endl;
113 free(ch);
114 ch = nullptr;
115 return 0;
116 }
117
118 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
119 free(ch);
120 ch = nullptr;
121 return 0;
122 }
123
124