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 FOO_MAX_LEN = 1024;
34 constexpr size_t U32_AT_SIZE = 4;
35 constexpr size_t OFFSET_ZERO = 24;
36 constexpr size_t OFFSET_ONE = 16;
37 constexpr size_t OFFSET_TWO = 8;
38 }
39 const std::u16string ABILITYMGR_INTERFACE_TOKEN = u"ohos.abilityshell.DistributedConnection";
40
41 class AbilityConnectionStubFuzzTest : public AbilityConnectionStub {
42 public:
43 AbilityConnectionStubFuzzTest() = default;
~AbilityConnectionStubFuzzTest()44 virtual ~AbilityConnectionStubFuzzTest()
45 {};
OnAbilityConnectDone(const AppExecFwk::ElementName & element,const sptr<IRemoteObject> & remoteObject,int resultCode)46 void OnAbilityConnectDone(const AppExecFwk::ElementName& element,
47 const sptr<IRemoteObject>& remoteObject, int resultCode) override
48 {}
OnAbilityDisconnectDone(const AppExecFwk::ElementName & element,int resultCode)49 void OnAbilityDisconnectDone(const AppExecFwk::ElementName& element, int resultCode) override
50 {}
51 };
52
GetU32Data(const char * ptr)53 uint32_t GetU32Data(const char* ptr)
54 {
55 // convert fuzz input data to an integer
56 return (ptr[INPUT_ZERO] << OFFSET_ZERO) | (ptr[INPUT_ONE] << OFFSET_ONE) | (ptr[INPUT_TWO] << OFFSET_TWO) |
57 ptr[INPUT_THREE];
58 }
59
DoSomethingInterestingWithMyAPI(const char * data,size_t size)60 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
61 {
62 uint32_t code = GetU32Data(data);
63
64 MessageParcel parcel;
65 parcel.WriteInterfaceToken(ABILITYMGR_INTERFACE_TOKEN);
66 parcel.WriteBuffer(data, size);
67 parcel.RewindRead(0);
68 MessageParcel reply;
69 MessageOption option;
70
71 std::shared_ptr<AbilityConnectionStub> abilityconnectionstub = std::make_shared<AbilityConnectionStubFuzzTest>();
72
73 abilityconnectionstub->OnRemoteRequest(code, parcel, reply, option);
74
75 return true;
76 }
77 }
78
79 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)80 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
81 {
82 /* Run your code on data */
83 if (data == nullptr) {
84 std::cout << "invalid data" << std::endl;
85 return 0;
86 }
87
88 /* Validate the length of size */
89 if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
90 return 0;
91 }
92
93 char* ch = static_cast<char*>(malloc(size + 1));
94 if (ch == nullptr) {
95 std::cout << "malloc failed." << std::endl;
96 return 0;
97 }
98
99 (void)memset_s(ch, size + 1, 0x00, size + 1);
100 if (memcpy_s(ch, size, data, size) != EOK) {
101 std::cout << "copy failed." << std::endl;
102 free(ch);
103 ch = nullptr;
104 return 0;
105 }
106
107 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
108 free(ch);
109 ch = nullptr;
110 return 0;
111 }
112
113