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 "formmgrproxyannex_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #define private public
22 #define protected public
23 #include "form_mgr_proxy.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 }
39
DoSomethingInterestingWithMyAPI(const char * data,size_t size)40 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
41 {
42 sptr<IRemoteObject> impl = nullptr;
43 FormMgrProxy formMgrProxy(impl);
44 std::vector<int64_t> formIds;
45 int64_t formId = static_cast<int64_t>(GetU32Data(data));
46 formIds.emplace_back(formId);
47 bool isProtected = *data % ENABLE;
48 sptr<IRemoteObject> callerToken = nullptr;
49 formMgrProxy.NotifyFormsPrivacyProtected(formIds, isProtected, callerToken);
50 return true;
51 }
52 }
53
54 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)55 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
56 {
57 /* Run your code on data */
58 if (data == nullptr) {
59 return 0;
60 }
61
62 if (size < OHOS::U32_AT_SIZE) {
63 return 0;
64 }
65
66 /* Validate the length of size */
67 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
68 return 0;
69 }
70
71 char* ch = static_cast<char*>(malloc(size + 1));
72 if (ch == nullptr) {
73 return 0;
74 }
75
76 (void)memset_s(ch, size + 1, 0x00, size + 1);
77 if (memcpy_s(ch, size + 1, data, size) != EOK) {
78 free(ch);
79 ch = nullptr;
80 return 0;
81 }
82
83 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
84 free(ch);
85 ch = nullptr;
86 return 0;
87 }
88
89