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 "abilityconnectionstub_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "ability_connect_callback_stub.h"
22 #include "message_parcel.h"
23 #include "securec.h"
24
25 using namespace OHOS::AAFwk;
26
27 namespace OHOS {
28 namespace {
29 constexpr int INPUT_ZERO = 0;
30 constexpr int INPUT_ONE = 1;
31 constexpr int INPUT_TWO = 2;
32 constexpr int INPUT_THREE = 3;
33 constexpr size_t U32_AT_SIZE = 4;
34 constexpr size_t OFFSET_ZERO = 24;
35 constexpr size_t OFFSET_ONE = 16;
36 constexpr size_t OFFSET_TWO = 8;
37 }
38 const std::u16string ABILITYMGR_INTERFACE_TOKEN = u"ohos.abilityshell.DistributedConnection";
39
40 class AbilityConnectionStubFuzzTest : public AbilityConnectionStub {
41 public:
42 AbilityConnectionStubFuzzTest() = default;
~AbilityConnectionStubFuzzTest()43 virtual ~AbilityConnectionStubFuzzTest()
44 {};
OnAbilityConnectDone(const AppExecFwk::ElementName & element,const sptr<IRemoteObject> & remoteObject,int resultCode)45 void OnAbilityConnectDone(const AppExecFwk::ElementName& element,
46 const sptr<IRemoteObject>& remoteObject, int resultCode) override
47 {}
OnAbilityDisconnectDone(const AppExecFwk::ElementName & element,int resultCode)48 void OnAbilityDisconnectDone(const AppExecFwk::ElementName& element, int resultCode) override
49 {}
50 };
51
GetU32Data(const char * ptr)52 uint32_t GetU32Data(const char* ptr)
53 {
54 // convert fuzz input data to an integer
55 return (ptr[INPUT_ZERO] << OFFSET_ZERO) | (ptr[INPUT_ONE] << OFFSET_ONE) | (ptr[INPUT_TWO] << OFFSET_TWO) |
56 ptr[INPUT_THREE];
57 }
58
DoSomethingInterestingWithMyAPI(const char * data,size_t size)59 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
60 {
61 uint32_t code = GetU32Data(data);
62
63 MessageParcel parcel;
64 parcel.WriteInterfaceToken(ABILITYMGR_INTERFACE_TOKEN);
65 parcel.WriteBuffer(data, size);
66 parcel.RewindRead(0);
67 MessageParcel reply;
68 MessageOption option;
69
70 std::shared_ptr<AbilityConnectionStub> abilityconnectionstub = std::make_shared<AbilityConnectionStubFuzzTest>();
71
72 abilityconnectionstub->OnRemoteRequest(code, parcel, reply, option);
73
74 return true;
75 }
76 }
77
78 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)79 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
80 {
81 /* Run your code on data */
82 if (data == nullptr) {
83 std::cout << "invalid data" << std::endl;
84 return 0;
85 }
86
87 /* Validate the length of size */
88 if (size < OHOS::U32_AT_SIZE) {
89 return 0;
90 }
91
92 char* ch = static_cast<char*>(malloc(size + 1));
93 if (ch == nullptr) {
94 std::cout << "malloc failed." << std::endl;
95 return 0;
96 }
97
98 (void)memset_s(ch, size + 1, 0x00, size + 1);
99 if (memcpy_s(ch, size, data, size) != EOK) {
100 std::cout << "copy failed." << std::endl;
101 free(ch);
102 ch = nullptr;
103 return 0;
104 }
105
106 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
107 free(ch);
108 ch = nullptr;
109 return 0;
110 }
111
112