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 FOO_MAX_LEN = 1024;
36 constexpr size_t U32_AT_SIZE = 4;
37 constexpr size_t OFFSET_ZERO = 24;
38 constexpr size_t OFFSET_ONE = 16;
39 constexpr size_t OFFSET_TWO = 8;
40 constexpr uint8_t ENABLE = 2;
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 = AbilityRecord::CreateAbilityRecord(abilityRequest);
58 if (abilityRecord) {
59 token = abilityRecord->GetToken();
60 }
61 return token;
62 }
63
DoSomethingInterestingWithMyAPI(const char *data, size_t size)64 bool DoSomethingInterestingWithMyAPI(const char *data, size_t size)
65 {
66 int intParam = static_cast<int>(GetU32Data(data));
67 int32_t int32Param = static_cast<int32_t>(GetU32Data(data));
68 auto startOtherAppInterceptor = std::make_shared<StartOtherAppInterceptor>();
69 Want want;
70 bool boolParam = *data % ENABLE;
71 AppExecFwk::ApplicationInfo appInfo;
72 sptr<IRemoteObject> token = GetFuzzAbilityToken();
73 auto shouldBlockFunc = []() { return false; };
74 AbilityInterceptorParam param = AbilityInterceptorParam(want, intParam, int32Param, boolParam, token,
75 shouldBlockFunc);
76 startOtherAppInterceptor->DoProcess(param);
77 startOtherAppInterceptor->CheckNativeCall();
78 startOtherAppInterceptor->CheckCallerIsSystemApp();
79 startOtherAppInterceptor->CheckTargetIsSystemApp(appInfo);
80 startOtherAppInterceptor->GetApplicationInfo(token, appInfo);
81 startOtherAppInterceptor->CheckAncoShellCall(appInfo, want);
82 startOtherAppInterceptor->CheckStartOtherApp(want);
83 startOtherAppInterceptor->CheckCallerApiBelow12(appInfo);
84 startOtherAppInterceptor->IsDelegatorCall(want);
85 return true;
86 }
87 } // namespace OHOS
88
89 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)90 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
91 {
92 /* Run your code on data */
93 if (data == nullptr) {
94 std::cout << "invalid data" << std::endl;
95 return 0;
96 }
97
98 /* Validate the length of size */
99 if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
100 return 0;
101 }
102
103 char *ch = (char *)malloc(size + 1);
104 if (ch == nullptr) {
105 std::cout << "malloc failed." << std::endl;
106 return 0;
107 }
108
109 (void)memset_s(ch, size + 1, 0x00, size + 1);
110 if (memcpy_s(ch, size + 1, data, size) != EOK) {
111 std::cout << "copy failed." << std::endl;
112 free(ch);
113 ch = nullptr;
114 return 0;
115 }
116
117 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
118 free(ch);
119 ch = nullptr;
120 return 0;
121 }