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 "formdbcache_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #define private public
22 #define protected public
23 #include "form_db_cache.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 U32_AT_SIZE = 4;
GetU32Data(const char * ptr)32 uint32_t GetU32Data(const char* ptr)
33 {
34 // convert fuzz input data to an integer
35 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
36 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)37 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
38 {
39 FormDbCache formDbCache;
40 formDbCache.Start();
41 FormDBInfo formDBInfo;
42 formDbCache.SaveFormInfo(formDBInfo);
43 formDbCache.SaveFormInfoNolock(formDBInfo);
44 int64_t formId = static_cast<int64_t>(GetU32Data(data));
45 formDbCache.DeleteFormInfo(formId);
46 int32_t hostUid = static_cast<int32_t>(GetU32Data(data));
47 formDbCache.IsHostOwner(formId, hostUid);
48 formDbCache.UpdateFormLocation(formId, hostUid);
49 std::string bundleName(data, size);
50 int32_t userId = static_cast<int32_t>(GetU32Data(data));
51 std::vector<FormDBInfo> removedDBForms;
52 removedDBForms.emplace_back(formDBInfo);
53 formDbCache.DeleteFormInfoByBundleName(bundleName, userId, removedDBForms);
54 return true;
55 }
56 }
57
58 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)59 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
60 {
61 /* Run your code on data */
62 if (data == nullptr) {
63 return 0;
64 }
65
66 if (size < OHOS::U32_AT_SIZE) {
67 return 0;
68 }
69
70 char* ch = static_cast<char*>(malloc(size + 1));
71 if (ch == nullptr) {
72 return 0;
73 }
74
75 (void)memset_s(ch, size + 1, 0x00, size + 1);
76 if (memcpy_s(ch, size + 1, data, size) != EOK) {
77 free(ch);
78 ch = nullptr;
79 return 0;
80 }
81
82 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
83 free(ch);
84 ch = nullptr;
85 return 0;
86 }
87
88