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 "startotherappinterceptor_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20 #define private public
21 #include "start_other_app_interceptor.h"
22 #undef private
23 #include "ability_record.h"
24 #include "start_ability_utils.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 auto startOtherAppInterceptor = std::make_shared<StartOtherAppInterceptor>();
68 Want want;
69 bool boolParam = *data % ENABLE;
70 AppExecFwk::ApplicationInfo appInfo;
71 sptr<IRemoteObject> token = GetFuzzAbilityToken();
72 auto shouldBlockFunc = []() { return false; };
73 AbilityInterceptorParam param = AbilityInterceptorParam(want, intParam, int32Param, boolParam, token,
74 shouldBlockFunc);
75 startOtherAppInterceptor->DoProcess(param);
76 startOtherAppInterceptor->CheckNativeCall();
77 startOtherAppInterceptor->CheckCallerIsSystemApp();
78 startOtherAppInterceptor->CheckTargetIsSystemApp(appInfo);
79 startOtherAppInterceptor->GetApplicationInfo(token, appInfo);
80 startOtherAppInterceptor->CheckAncoShellCall(appInfo, want);
81 startOtherAppInterceptor->CheckStartOtherApp(want);
82 startOtherAppInterceptor->CheckCallerApiBelow12(appInfo);
83 startOtherAppInterceptor->IsDelegatorCall(want);
84 return true;
85 }
86 } // namespace OHOS
87
88 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)89 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
90 {
91 /* Run your code on data */
92 if (data == nullptr) {
93 std::cout << "invalid data" << std::endl;
94 return 0;
95 }
96
97 /* Validate the length of size */
98 if (size < OHOS::U32_AT_SIZE) {
99 return 0;
100 }
101
102 char *ch = static_cast<char*>(malloc(size + 1));
103 if (ch == nullptr) {
104 std::cout << "malloc failed." << std::endl;
105 return 0;
106 }
107
108 (void)memset_s(ch, size + 1, 0x00, size + 1);
109 if (memcpy_s(ch, size + 1, data, size) != EOK) {
110 std::cout << "copy failed." << std::endl;
111 free(ch);
112 ch = nullptr;
113 return 0;
114 }
115
116 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
117 free(ch);
118 ch = nullptr;
119 return 0;
120 }