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 "formcachemgr_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #define private public
22 #define protected public
23 #include "form_cache_mgr.h"
24 #include "form_event_handler.h"
25 #include "form_serial_queue.h"
26 #undef private
27 #undef protected
28 #include "securec.h"
29
30 using namespace OHOS::AppExecFwk;
31
32 namespace OHOS {
33 constexpr size_t FOO_MAX_LEN = 1024;
34 constexpr size_t U32_AT_SIZE = 4;
35 constexpr int64_t EVENT_MSG = 1;
36 constexpr int64_t EVENT_ID = 2;
GetU32Data(const char * ptr)37 uint32_t GetU32Data(const char* ptr)
38 {
39 // convert fuzz input data to an integer
40 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
41 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)42 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
43 {
44 FormCacheMgr formCacheMgr;
45 int64_t formId = static_cast<int64_t>(GetU32Data(data));
46 std::string datas(data, size);
47 std::map<std::string, std::pair<sptr<FormAshmem>, int32_t>> imageDataMap;
48 formCacheMgr.GetData(formId, datas, imageDataMap);
49
50 FormProviderData formProviderData;
51 formProviderData.SetDataString(datas);
52 formCacheMgr.AddData(formId, formProviderData);
53
54 formCacheMgr.DeleteData(formId);
55 FormEventHandler formEventHandler(nullptr);
56 AppExecFwk::InnerEvent::Pointer event = AppExecFwk::InnerEvent::Get();
57 formEventHandler.ProcessEvent(EVENT_MSG, EVENT_ID);
58 formEventHandler.GetEventId();
59 std::shared_ptr<FormEventTimeoutObserver> observer = nullptr;
60 formEventHandler.RegisterEventTimeoutObserver(observer);
61 formEventHandler.UnregisterEventTimeoutObserver(observer);
62 return formCacheMgr.NeedAcquireProviderData(formId);
63 }
64 }
65
66 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)67 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
68 {
69 /* Run your code on data */
70 if (data == nullptr) {
71 return 0;
72 }
73
74 if (size < OHOS::U32_AT_SIZE) {
75 return 0;
76 }
77
78 /* Validate the length of size */
79 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
80 return 0;
81 }
82
83 char* ch = static_cast<char*>(malloc(size + 1));
84 if (ch == nullptr) {
85 return 0;
86 }
87
88 (void)memset_s(ch, size + 1, 0x00, size + 1);
89 if (memcpy_s(ch, size + 1, data, size) != EOK) {
90 free(ch);
91 ch = nullptr;
92 return 0;
93 }
94
95 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
96 free(ch);
97 ch = nullptr;
98 return 0;
99 }
100
101