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 "wantsenderstub_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "want_sender_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 ENABLE = 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 const std::u16string ABILITYMGR_INTERFACE_TOKEN = u"ohos.aafwk.WantSender";
38 }
39
40 class WantSenderStubFuzzTest : public WantSenderStub {
41 public:
42 WantSenderStubFuzzTest() = default;
~WantSenderStubFuzzTest()43 virtual ~WantSenderStubFuzzTest()
44 {}
Send(SenderInfo & senderInfo)45 void Send(SenderInfo& senderInfo) override
46 {}
47 };
48
GetU32Data(const char * ptr)49 uint32_t GetU32Data(const char* ptr)
50 {
51 // convert fuzz input data to an integer
52 return (ptr[INPUT_ZERO] << OFFSET_ZERO) | (ptr[INPUT_ONE] << OFFSET_ONE) | (ptr[ENABLE] << OFFSET_TWO) |
53 ptr[INPUT_THREE];
54 }
55
DoSomethingInterestingWithMyAPI(const char * data,size_t size)56 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
57 {
58 uint32_t code = GetU32Data(data);
59
60 MessageParcel parcel;
61 parcel.WriteInterfaceToken(ABILITYMGR_INTERFACE_TOKEN);
62 parcel.WriteBuffer(data, size);
63 parcel.RewindRead(0);
64 MessageParcel reply;
65 MessageOption option;
66
67 std::shared_ptr<WantSenderStub> wantsenderstub = std::make_shared<WantSenderStubFuzzTest>();
68
69 wantsenderstub->OnRemoteRequest(code, parcel, reply, option);
70
71 return true;
72 }
73 }
74
75 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)76 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
77 {
78 /* Run your code on data */
79 if (data == nullptr) {
80 std::cout << "invalid data" << std::endl;
81 return 0;
82 }
83
84 /* Validate the length of size */
85 if (size < OHOS::U32_AT_SIZE) {
86 return 0;
87 }
88
89 char* ch = static_cast<char*>(malloc(size + 1));
90 if (ch == nullptr) {
91 std::cout << "malloc failed." << std::endl;
92 return 0;
93 }
94
95 (void)memset_s(ch, size + 1, 0x00, size + 1);
96 if (memcpy_s(ch, size + 1, data, size) != EOK) {
97 std::cout << "copy failed." << std::endl;
98 free(ch);
99 ch = nullptr;
100 return 0;
101 }
102
103 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
104 free(ch);
105 ch = nullptr;
106 return 0;
107 }