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 "native_implement_eventhandler.h"
17 #include "native_interface_eventhandler.h"
18 #include "nativeimplementeventhandler_fuzzer.h"
19 #include "securec.h"
20
21 namespace OHOS {
22 namespace {
23 constexpr size_t U32_AT_SIZE = 4;
24 constexpr uint8_t ENABLE = 2;
25 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)26 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
27 {
28 bool current = *data % ENABLE;
29 if (current == 0) {
30 int32_t fileDescriptor = U32_AT(reinterpret_cast<const uint8_t*>(data));
31 EventRunnerNativeImplement eventRunnerNativeImplement(current);
32 eventRunnerNativeImplement.RemoveFileDescriptorListener(fileDescriptor);
33 return true;
34 } else {
35 return false;
36 }
37 }
38 }
39
40 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)41 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
42 {
43 /* Run your code on data */
44 if (data == nullptr) {
45 return 0;
46 }
47
48 if (size < OHOS::U32_AT_SIZE) {
49 return 0;
50 }
51
52 char* ch = reinterpret_cast<char *>(malloc(size + 1));
53 if (ch == nullptr) {
54 return 0;
55 }
56
57 (void)memset_s(ch, size + 1, 0x00, size + 1);
58 if (memcpy_s(ch, size, data, size) != EOK) {
59 free(ch);
60 ch = nullptr;
61 return 0;
62 }
63
64 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
65 free(ch);
66 ch = nullptr;
67 return 0;
68 }
69