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 "formmanager_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "form_mgr/form_mgr_service.h"
22 #include "message_parcel.h"
23 #include "securec.h"
24
25 using namespace OHOS::AppExecFwk;
26
27 namespace OHOS {
28 constexpr size_t U32_AT_SIZE = 4;
29 const std::u16string FORMMGR_INTERFACE_TOKEN = u"ohos.appexecfwk.FormMgr";
30
GetU32Data(const char * ptr)31 uint32_t GetU32Data(const char* ptr)
32 {
33 // 将第0个数字左移24位，将第1个数字左移16位，将第2个数字左移8位，第3个数字不左移
34 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
35 }
36
DoSomethingInterestingWithMyAPI(const char * data,size_t size)37 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
38 {
39 uint32_t code = GetU32Data(data);
40 MessageParcel datas;
41 datas.WriteInterfaceToken(FORMMGR_INTERFACE_TOKEN);
42 datas.WriteBuffer(data, size);
43 datas.RewindRead(0);
44 MessageParcel reply;
45 MessageOption option;
46 DelayedSingleton<FormMgrService>::GetInstance()->OnRemoteRequest(code, datas, reply, option);
47 return true;
48 }
49 }
50
51 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)52 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
53 {
54 /* Run your code on data */
55 if (data == nullptr) {
56 return 0;
57 }
58
59 if (size < OHOS::U32_AT_SIZE) {
60 return 0;
61 }
62
63 char* ch = static_cast<char*>(malloc(size + 1));
64 if (ch == nullptr) {
65 return 0;
66 }
67
68 (void)memset_s(ch, size + 1, 0x00, size + 1);
69 if (memcpy_s(ch, size + 1, data, size) != EOK) {
70 free(ch);
71 ch = nullptr;
72 return 0;
73 }
74
75 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
76 free(ch);
77 ch = nullptr;
78 return 0;
79 }
80
81