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