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 "usercallbackstub_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #define private public
22 #include "user_callback_stub.h"
23 #undef private
24
25 #include "ability_record.h"
26
27 using namespace OHOS::AAFwk;
28 using namespace OHOS::AppExecFwk;
29
30 namespace OHOS {
31 namespace {
32 constexpr int INPUT_ZERO = 0;
33 constexpr int INPUT_ONE = 1;
34 constexpr int INPUT_TWO = 2;
35 constexpr int INPUT_THREE = 3;
36 constexpr size_t FOO_MAX_LEN = 1024;
37 constexpr size_t U32_AT_SIZE = 4;
38 constexpr size_t OFFSET_ZERO = 24;
39 constexpr size_t OFFSET_ONE = 16;
40 constexpr size_t OFFSET_TWO = 8;
41 constexpr uint8_t ENABLE = 2;
42 } // namespace
43
44 class UserCallbackStubFuzzTest : public UserCallbackStub {
45 public:
46 UserCallbackStubFuzzTest() = default;
~UserCallbackStubFuzzTest()47 virtual ~UserCallbackStubFuzzTest()
48 {}
OnStopUserDone(int userId,int errcode)49 void OnStopUserDone(int userId, int errcode) override
50 {}
OnStartUserDone(int userId,int errcode)51 void OnStartUserDone(int userId, int errcode) override {}
52 };
53 const std::u16string APPMGR_INTERFACE_TOKEN = u"ohos.aafwk.AppManager";
GetU32Data(const char * ptr)54 uint32_t GetU32Data(const char* ptr)
55 {
56 // convert fuzz input data to an integer
57 return (ptr[INPUT_ZERO] << OFFSET_ZERO) | (ptr[INPUT_ONE] << OFFSET_ONE) | (ptr[INPUT_TWO] << OFFSET_TWO) |
58 ptr[INPUT_THREE];
59 }
60
DoSomethingInterestingWithMyAPI(const char * data,size_t size)61 bool DoSomethingInterestingWithMyAPI(const char *data, size_t size)
62 {
63 uint32_t code = static_cast<uint32_t>(GetU32Data(data));
64 std::shared_ptr<UserCallbackStub> backStub = std::make_shared<UserCallbackStubFuzzTest>();
65 MessageParcel dataParcel;
66 dataParcel.WriteInterfaceToken(APPMGR_INTERFACE_TOKEN);
67 dataParcel.WriteBuffer(data, size);
68 dataParcel.RewindRead(0);
69 MessageParcel reply;
70 MessageOption option;
71 backStub->OnRemoteRequest(code, dataParcel, reply, option);
72 backStub->OnStopUserDoneInner(dataParcel, reply);
73 backStub->OnStartUserDoneInner(dataParcel, reply);
74
75 return true;
76 }
77 } // namespace OHOS
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 + 1, 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 }