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 "abilitymgrinterceptorexecuter_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #define private public
22 #include "interceptor/ability_interceptor_executer.h"
23 #undef private
24
25 #include "securec.h"
26 #include "ability_record.h"
27
28 using namespace OHOS::AAFwk;
29 using namespace OHOS::AppExecFwk;
30
31 namespace OHOS {
32 namespace {
33 constexpr int INPUT_ZERO = 0;
34 constexpr int INPUT_ONE = 1;
35 constexpr int INPUT_TWO = 2;
36 constexpr int INPUT_THREE = 3;
37 constexpr size_t FOO_MAX_LEN = 1024;
38 constexpr size_t U32_AT_SIZE = 4;
39 constexpr size_t OFFSET_ZERO = 24;
40 constexpr size_t OFFSET_ONE = 16;
41 constexpr size_t OFFSET_TWO = 8;
42 constexpr uint8_t ENABLE = 2;
43 }
GetU32Data(const char * ptr)44 uint32_t GetU32Data(const char* ptr)
45 {
46 // convert fuzz input data to an integer
47 return (ptr[INPUT_ZERO] << OFFSET_ZERO) | (ptr[INPUT_ONE] << OFFSET_ONE) | (ptr[INPUT_TWO] << OFFSET_TWO) |
48 ptr[INPUT_THREE];
49 }
50
GetFuzzAbilityToken()51 sptr<Token> GetFuzzAbilityToken()
52 {
53 sptr<Token> token = nullptr;
54 AbilityRequest abilityRequest;
55 abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
56 abilityRequest.abilityInfo.name = "MainAbility";
57 abilityRequest.abilityInfo.type = AbilityType::DATA;
58 std::shared_ptr<AbilityRecord> abilityRecord = 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<AbilityInterceptorExecuter> executer = std::make_shared<AbilityInterceptorExecuter>();
68 std::string jsonStr(data, size);
69 std::shared_ptr<IAbilityInterceptor> interceptor;
70 executer->AddInterceptor(jsonStr, interceptor);
71 executer->RemoveInterceptor(jsonStr);
72 Want want;
73 int requestCode = static_cast<int>(GetU32Data(data));
74 int32_t userId = static_cast<int32_t>(GetU32Data(data));
75 bool boolParam = *data % ENABLE;
76 sptr<IRemoteObject> callerToken = GetFuzzAbilityToken();
77 AbilityInterceptorParam param(want, requestCode, userId, boolParam, callerToken);
78 executer->DoProcess(param);
79 std::shared_ptr<AAFwk::TaskHandlerWrap> taskHandler;
80 executer->SetTaskHandler(taskHandler);
81 executer->GetInterceptorMapCopy();
82 return true;
83 }
84 }
85
86 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)87 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
88 {
89 /* Run your code on data */
90 if (data == nullptr) {
91 std::cout << "invalid data" << std::endl;
92 return 0;
93 }
94
95 /* Validate the length of size */
96 if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
97 return 0;
98 }
99
100 char* ch = static_cast<char*>(malloc(size + 1));
101 if (ch == nullptr) {
102 std::cout << "malloc failed." << std::endl;
103 return 0;
104 }
105
106 (void)memset_s(ch, size + 1, 0x00, size + 1);
107 if (memcpy_s(ch, size + 1, data, size) != EOK) {
108 std::cout << "copy failed." << std::endl;
109 free(ch);
110 ch = nullptr;
111 return 0;
112 }
113
114 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
115 free(ch);
116 ch = nullptr;
117 return 0;
118 }
119
120