1 /*
2 * Copyright (c) 2024 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 "screenunlockinterceptor_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "bundle_mgr_helper.h"
22 #include "screen_unlock_interceptor.h"
23
24 #include "ability_record.h"
25
26 using namespace OHOS::AAFwk;
27 using namespace OHOS::AppExecFwk;
28
29 namespace OHOS {
30 namespace {
31 constexpr int INPUT_ZERO = 0;
32 constexpr int INPUT_ONE = 1;
33 constexpr int INPUT_TWO = 2;
34 constexpr uint8_t ENABLE = 2;
35 constexpr int INPUT_THREE = 3;
36 constexpr size_t FOO_MAX_LEN = 1024;
37 constexpr size_t U32_AT_SIZE = 4;
38 constexpr size_t OFFSET_ZERO = 24;
39 constexpr size_t OFFSET_ONE = 16;
40 constexpr size_t OFFSET_TWO = 8;
41 } // namespace
42
GetU32Data(const char * ptr)43 uint32_t GetU32Data(const char* ptr)
44 {
45 // convert fuzz input data to an integer
46 return (ptr[INPUT_ZERO] << OFFSET_ZERO) | (ptr[INPUT_ONE] << OFFSET_ONE) | (ptr[INPUT_TWO] << OFFSET_TWO) |
47 ptr[INPUT_THREE];
48 }
49
GetFuzzAbilityToken()50 sptr<Token> GetFuzzAbilityToken()
51 {
52 sptr<Token> token = nullptr;
53 AbilityRequest abilityRequest;
54 abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
55 abilityRequest.abilityInfo.name = "MainAbility";
56 abilityRequest.abilityInfo.type = AbilityType::DATA;
57 std::shared_ptr<AbilityRecord> abilityRecord =
58 AbilityRecord::CreateAbilityRecord(abilityRequest);
59 if (abilityRecord) {
60 token = abilityRecord->GetToken();
61 }
62 return token;
63 }
64
DoSomethingInterestingWithMyAPI(const char * data,size_t size)65 bool DoSomethingInterestingWithMyAPI(const char *data, size_t size)
66 {
67 std::shared_ptr<ScreenUnlockInterceptor> screenUnlockInterceptor =
68 std::make_shared<ScreenUnlockInterceptor>();
69 std::string strParam(data, size);
70 int intParam = static_cast<int>(GetU32Data(data));
71 int32_t int32Param = static_cast<int32_t>(GetU32Data(data));
72 Want want;
73 bool boolParam = *data % ENABLE;
74 sptr<IRemoteObject> token = GetFuzzAbilityToken();
75 AbilityInterceptorParam param(want, intParam, int32Param, boolParam, token);
76 screenUnlockInterceptor->DoProcess(param);
77 return true;
78 }
79 } // namespace OHOS
80
81 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)82 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
83 {
84 /* Run your code on data */
85 if (data == nullptr) {
86 std::cout << "invalid data" << std::endl;
87 return 0;
88 }
89
90 /* Validate the length of size */
91 if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
92 return 0;
93 }
94
95 char *ch = static_cast<char*>(malloc(size + 1));
96 if (ch == nullptr) {
97 std::cout << "malloc failed." << std::endl;
98 return 0;
99 }
100
101 (void)memset_s(ch, size + 1, 0x00, size + 1);
102 if (memcpy_s(ch, size + 1, data, size) != EOK) {
103 std::cout << "copy failed." << std::endl;
104 free(ch);
105 ch = nullptr;
106 return 0;
107 }
108
109 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
110 free(ch);
111 ch = nullptr;
112 return 0;
113 }