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