1 /*
2  * Copyright (c) 2022 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 "abilityapppreloader_fuzzer.h"
17 
18 #include <cstddef>
19 #include <cstdint>
20 
21 #define private public
22 #define protected public
23 #include "app_preloader.h"
24 #include "bundle_mgr_helper.h"
25 #undef protected
26 #undef private
27 #include "parcel.h"
28 #include <iostream>
29 #include "securec.h"
30 #include "configuration.h"
31 
32 using namespace OHOS::AppExecFwk;
33 
34 namespace OHOS {
35 namespace {
36 constexpr int INPUT_ZERO = 0;
37 constexpr int INPUT_ONE = 1;
38 constexpr int INPUT_TWO = 2;
39 constexpr int INPUT_THREE = 3;
40 constexpr size_t FOO_MAX_LEN = 1024;
41 constexpr size_t U32_AT_SIZE = 4;
42 constexpr size_t OFFSET_ZERO = 24;
43 constexpr size_t OFFSET_ONE = 16;
44 constexpr size_t OFFSET_TWO = 8;
45 }
46 
GetU32Data(const char * ptr)47 uint32_t GetU32Data(const char* ptr)
48 {
49     // convert fuzz input data to an integer
50     return (ptr[INPUT_ZERO] << OFFSET_ZERO) | (ptr[INPUT_ONE] << OFFSET_ONE) | (ptr[INPUT_TWO] << OFFSET_TWO) |
51         ptr[INPUT_THREE];
52 }
53 
DoSomethingInterestingWithMyAPI(const char * data,size_t size)54 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
55 {
56     std::shared_ptr<RemoteClientManager> remoteClientManager = std::make_shared<RemoteClientManager>();
57     auto bundleMgrHelper = std::make_shared<AppExecFwk::BundleMgrHelper>();
58     remoteClientManager->SetBundleManagerHelper(bundleMgrHelper);
59     auto appPreloader = std::make_shared<AppPreloader>(remoteClientManager);
60     std::string bundleName(data, size);
61     int32_t userId = static_cast<int32_t>(GetU32Data(data));
62     int32_t appIndex = static_cast<int32_t>(GetU32Data(data));
63     PreloadRequest request;
64     appPreloader->GeneratePreloadRequest(bundleName, userId, appIndex, request);
65     appPreloader->GetBundleManagerHelper();
66     AbilityInfo abilityInfo;
67     appPreloader->CheckPreloadConditions(abilityInfo);
68     AAFwk::Want launchWant;
69     appPreloader->GetLaunchWant(bundleName, userId, launchWant);
70     appPreloader->GetLaunchAbilityInfo(launchWant, userId, abilityInfo);
71     appPreloader->PreCheck(bundleName, PreloadMode::PRE_MAKE);
72     return true;
73 }
74 }
75 
76 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)77 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
78 {
79     /* Run your code on data */
80     if (data == nullptr) {
81         return 0;
82     }
83 
84     /* Validate the length of size */
85     if (size < OHOS::U32_AT_SIZE || size > OHOS::FOO_MAX_LEN) {
86         return 0;
87     }
88 
89     char* ch = (char*)malloc(size + 1);
90     if (ch == nullptr) {
91         std::cout << "malloc failed." << std::endl;
92         return 0;
93     }
94 
95     (void)memset_s(ch, size + 1, 0x00, size + 1);
96     if (memcpy_s(ch, size, data, size) != EOK) {
97         std::cout << "copy failed." << std::endl;
98         free(ch);
99         ch = nullptr;
100         return 0;
101     }
102 
103     OHOS::DoSomethingInterestingWithMyAPI(ch, size);
104     free(ch);
105     ch = nullptr;
106     return 0;
107 }
108 
109