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 FormEventUtil::HandleProviderUpdated(bundleName, userId);
53 int32_t userIds = static_cast<int32_t>(GetU32Data(data));
54 FormEventUtil::HandleProviderRemoved(bundleName, userIds);
55 BundlePackInfo bundlePackInfo;
56 BundleInfo bundleInfo;
57 FormEventUtil::ProviderFormUpdated(formId, formRecord, bundlePackInfo, bundleInfo);
58 FormEventUtil::HandleBundleFormInfoChanged(bundleName, userIds);
59 FormEventUtil::HandleUpdateFormCloud(bundleName);
60 FormEventUtil::HandleBundleFormInfoRemoved(bundleName, userIds);
61 FormEventUtil::HandleBundleDataCleared(bundleName, userIds);
62 int uid = static_cast<int>(GetU32Data(data));
63 FormEventUtil::HandleFormHostDataCleared(uid);
64 AAFwk::Want want;
65 formSysEventReceiver.HandleAbilityUpdate(want, bundleName);
66 formSysEventReceiver.HandlePackageDataCleared(bundleName, userId);
67 formSysEventReceiver.HandleUserUnlocked();
68 formSysEventReceiver.HandleUserSwitched(eventData);
69 bool flag = *data % ENABLE;
70 std::map<int64_t, bool> removedFormsMap;
71 removedFormsMap.emplace(formId, flag);
72 FormEventUtil::ClearFormDBRecordData(uid, removedFormsMap);
73 FormEventUtil::ClearTempFormRecordData(uid, removedFormsMap);
74 std::string abilityName;
75 FormIdKey formIdKey(bundleName, abilityName);
76 std::set<int64_t> formNums;
77 formNums.insert(formId);
78 std::map<FormIdKey, std::set<int64_t>> noHostFormDbMap;
79 noHostFormDbMap.emplace(formIdKey, formNums);
80 FormEventUtil::BatchDeleteNoHostDBForms(uid, noHostFormDbMap, removedFormsMap);
81 FormEventUtil::BatchDeleteNoHostTempForms(uid, noHostFormDbMap, removedFormsMap);
82 FormEventUtil::ReCreateForm(formId);
83 FormTimerCfg cfg;
84 FormEventUtil::HandleTimerUpdate(formId, formRecord, cfg);
85 formSysEventReceiver.HandleUserIdRemoved(userIds);
86 formSysEventReceiver.HandleBundleScanFinished();
87 eventData.SetCode(userIds);
88 return FormEventUtil::ProviderFormUpdated(formId, formRecord, targetForms, bundleInfo);
89 }
90 }
91
92 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)93 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
94 {
95 /* Run your code on data */
96 if (data == nullptr) {
97 return 0;
98 }
99
100 if (size < OHOS::U32_AT_SIZE) {
101 return 0;
102 }
103
104 /* Validate the length of size */
105 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
106 return 0;
107 }
108
109 char* ch = static_cast<char*>(malloc(size + 1));
110 if (ch == nullptr) {
111 return 0;
112 }
113
114 (void)memset_s(ch, size + 1, 0x00, size + 1);
115 if (memcpy_s(ch, size + 1, data, size) != EOK) {
116 free(ch);
117 ch = nullptr;
118 return 0;
119 }
120
121 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
122 free(ch);
123 ch = nullptr;
124 return 0;
125 }
126
127