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 #define private public
17 #include <cstddef>
18 #include <cstdint>
19 #include <iostream>
20 #include "driver_installer.h"
21
22 #include "driverinstaller_fuzzer.h"
23 #include "securec.h"
24
25 using namespace OHOS::AppExecFwk;
26 using namespace OHOS::AAFwk;
27 namespace OHOS {
28
29 constexpr size_t FOO_MAX_LEN = 1024;
30 constexpr size_t U32_AT_SIZE = 4;
31 constexpr uint8_t ENABLE = 2;
DoSomethingInterestingWithMyAPI(const char * data,size_t size)32 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
33 {
34 std::shared_ptr driverInstaller = std::make_shared<DriverInstaller>();
35 InnerBundleInfo info;
36 std::string bundleName(reinterpret_cast<const char*>(data), size);
37 std::string moduleName(reinterpret_cast<const char*>(data), size);
38 std::string fileName(reinterpret_cast<const char*>(data), size);
39 std::string destinedDir(reinterpret_cast<const char*>(data), size);
40 bool isModuleExisted = *data % ENABLE;
41 auto res = driverInstaller->CreateDriverSoDestinedDir(bundleName,
42 moduleName, fileName, destinedDir, isModuleExisted);
43
44 driverInstaller->RemoveDriverSoFile(info, moduleName, isModuleExisted);
45
46 Metadata meta;
47 std::unordered_multimap<std::string, std::string> dirMap;
48 driverInstaller->FilterDriverSoFile(info, meta, dirMap, isModuleExisted);
49
50 std::unordered_map<std::string, InnerBundleInfo> newInfos;
51 InnerBundleInfo oldInfo;
52 driverInstaller->CopyAllDriverFile(newInfos, oldInfo);
53
54 std::string srcPath(reinterpret_cast<const char*>(data), size);
55 driverInstaller->CopyDriverSoFile(info, srcPath, isModuleExisted);
56
57 driverInstaller->RemoveAndReNameDriverFile(newInfos, oldInfo);
58
59 driverInstaller->RenameDriverFile(info);
60
61 return true;
62 }
63 }
64
65 // Fuzzer entry point.
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)66 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
67 {
68 /* Run your code on data */
69 if (data == nullptr) {
70 return 0;
71 }
72
73 /* Validate the length of size */
74 if (size < OHOS::U32_AT_SIZE || size > OHOS::FOO_MAX_LEN) {
75 return 0;
76 }
77
78 char* ch = (char*)malloc(size + 1);
79 if (ch == nullptr) {
80 std::cout << "malloc failed." << std::endl;
81 return 0;
82 }
83
84 (void)memset_s(ch, size + 1, 0x00, size + 1);
85 if (memcpy_s(ch, size + 1, data, size) != EOK) {
86 std::cout << "copy failed." << std::endl;
87 free(ch);
88 ch = nullptr;
89 return 0;
90 }
91
92 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
93 free(ch);
94 ch = nullptr;
95 return 0;
96 }