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 "formsyseventreceiver_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #define private public
22 #define protected public
23 #include "form_sys_event_receiver.h"
24 #undef private
25 #undef protected
26 #include "securec.h"
27
28 using namespace OHOS::AppExecFwk;
29
30 namespace OHOS {
31 constexpr size_t FOO_MAX_LEN = 1024;
32 constexpr size_t U32_AT_SIZE = 4;
33 constexpr uint8_t ENABLE = 2;
GetU32Data(const char * ptr)34 uint32_t GetU32Data(const char* ptr)
35 {
36 // convert fuzz input data to an integer
37 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
38 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)39 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
40 {
41 EventFwk::CommonEventSubscribeInfo subscriberInfo;
42 FormSysEventReceiver formSysEventReceiver(subscriberInfo);
43 EventFwk::CommonEventData eventData;
44 formSysEventReceiver.OnReceiveEvent(eventData);
45 int64_t formId = static_cast<int64_t>(GetU32Data(data));
46 FormRecord formRecord;
47 FormInfo formInfo;
48 std::vector<FormInfo> targetForms;
49 targetForms.emplace_back(formInfo);
50 std::string bundleName(data, size);
51 int userId = static_cast<int>(GetU32Data(data));
52 formSysEventReceiver.formEventHelper_.HandleProviderUpdated(bundleName, userId);
53 int32_t userIds = static_cast<int32_t>(GetU32Data(data));
54 formSysEventReceiver.formEventHelper_.HandleProviderRemoved(bundleName, userIds);
55 BundlePackInfo bundlePackInfo;
56 formSysEventReceiver.formEventHelper_.ProviderFormUpdated(formId, formRecord, bundlePackInfo);
57 formSysEventReceiver.formEventHelper_.HandleBundleFormInfoChanged(bundleName, userIds);
58 formSysEventReceiver.formEventHelper_.HandleBundleFormInfoRemoved(bundleName, userIds);
59 formSysEventReceiver.formEventHelper_.HandleBundleDataCleared(bundleName, userIds);
60 int uid = static_cast<int>(GetU32Data(data));
61 formSysEventReceiver.formEventHelper_.HandleFormHostDataCleared(uid);
62 bool flag = *data % ENABLE;
63 std::map<int64_t, bool> removedFormsMap;
64 removedFormsMap.emplace(formId, flag);
65 formSysEventReceiver.formEventHelper_.ClearFormDBRecordData(uid, removedFormsMap);
66 formSysEventReceiver.formEventHelper_.ClearTempFormRecordData(uid, removedFormsMap);
67 std::string abilityName;
68 FormIdKey formIdKey(bundleName, abilityName);
69 std::set<int64_t> formNums;
70 formNums.insert(formId);
71 std::map<FormIdKey, std::set<int64_t>> noHostFormDbMap;
72 noHostFormDbMap.emplace(formIdKey, formNums);
73 formSysEventReceiver.formEventHelper_.BatchDeleteNoHostDBForms(uid, noHostFormDbMap, removedFormsMap);
74 formSysEventReceiver.formEventHelper_.BatchDeleteNoHostTempForms(uid, noHostFormDbMap, removedFormsMap);
75 formSysEventReceiver.formEventHelper_.ReCreateForm(formId);
76 FormTimerCfg cfg;
77 formSysEventReceiver.formEventHelper_.HandleTimerUpdate(formId, formRecord, cfg);
78 formSysEventReceiver.HandleUserIdRemoved(userIds);
79 formSysEventReceiver.HandleBundleScanFinished(userIds);
80 return formSysEventReceiver.formEventHelper_.ProviderFormUpdated(formId, formRecord, targetForms);
81 }
82 }
83
84 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)85 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
86 {
87 /* Run your code on data */
88 if (data == nullptr) {
89 return 0;
90 }
91
92 if (size < OHOS::U32_AT_SIZE) {
93 return 0;
94 }
95
96 /* Validate the length of size */
97 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
98 return 0;
99 }
100
101 char* ch = (char *)malloc(size + 1);
102 if (ch == nullptr) {
103 return 0;
104 }
105
106 (void)memset_s(ch, size + 1, 0x00, size + 1);
107 if (memcpy_s(ch, size, data, size) != EOK) {
108 free(ch);
109 ch = nullptr;
110 return 0;
111 }
112
113 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
114 free(ch);
115 ch = nullptr;
116 return 0;
117 }
118
119