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 "geterrormsg_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "form_mgr.h"
22 #include "securec.h"
23
24 using namespace OHOS::AppExecFwk;
25
26 namespace OHOS {
27 constexpr size_t FOO_MAX_LEN = 1024;
28 constexpr size_t U32_AT_SIZE = 4;
GetU32Data(const char * ptr)29 uint32_t GetU32Data(const char* ptr)
30 {
31 // convert fuzz input data to an integer
32 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
33 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)34 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
35 {
36 int errorCode = static_cast<int>(GetU32Data(data));
37 if (FormMgr::GetInstance().GetErrorMsg(errorCode).empty()) {
38 std::cout << "GetErrorMsg failed" << std::endl;
39 return false;
40 }
41
42 return true;
43 }
44 }
45
46 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)47 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
48 {
49 /* Run your code on data */
50 if (data == nullptr) {
51 std::cout << "invalid data" << std::endl;
52 return 0;
53 }
54
55 if (size < OHOS::U32_AT_SIZE) {
56 return 0;
57 }
58
59 /* Validate the length of size */
60 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
61 std::cout << "invalid size" << std::endl;
62 return 0;
63 }
64
65 char* ch = new char[size + 1];
66 if (ch == nullptr) {
67 std::cout << "new failed." << std::endl;
68 return 0;
69 }
70
71 (void)memset_s(ch, size + 1, 0x00, size + 1);
72 if (memcpy_s(ch, size + 1, data, size) != EOK) {
73 std::cout << "copy failed." << std::endl;
74 delete[] ch;
75 ch = nullptr;
76 return 0;
77 }
78
79 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
80 delete[] ch;
81 ch = nullptr;
82 return 0;
83 }
84
85