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