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_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 FOO_MAX_LEN = 1024;
29 constexpr size_t U32_AT_SIZE = 4;
30 const std::u16string FORMMGR_INTERFACE_TOKEN = u"ohos.appexecfwk.FormMgr";
31
GetU32Data(const char * ptr)32 uint32_t GetU32Data(const char* ptr)
33 {
34 // 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
35 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
36 }
37
DoSomethingInterestingWithMyAPI(const char * data,size_t size)38 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
39 {
40 uint32_t code = GetU32Data(data);
41 MessageParcel datas;
42 datas.WriteInterfaceToken(FORMMGR_INTERFACE_TOKEN);
43 datas.WriteBuffer(data, size);
44 datas.RewindRead(0);
45 MessageParcel reply;
46 MessageOption option;
47 DelayedSingleton<FormMgrService>::GetInstance()->OnRemoteRequest(code, datas, reply, option);
48 return true;
49 }
50 }
51
52 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)53 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
54 {
55 /* Run your code on data */
56 if (data == nullptr) {
57 return 0;
58 }
59
60 if (size < OHOS::U32_AT_SIZE) {
61 return 0;
62 }
63
64 /* Validate the length of size */
65 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
66 return 0;
67 }
68
69 char* ch = static_cast<char*>(malloc(size + 1));
70 if (ch == nullptr) {
71 return 0;
72 }
73
74 (void)memset_s(ch, size + 1, 0x00, size + 1);
75 if (memcpy_s(ch, size + 1, data, size) != EOK) {
76 free(ch);
77 ch = nullptr;
78 return 0;
79 }
80
81 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
82 free(ch);
83 ch = nullptr;
84 return 0;
85 }
86
87