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 "appmanager_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "app_mgr_service.h"
22 #include "message_parcel.h"
23 #include "securec.h"
24
25 using namespace OHOS::AAFwk;
26 using namespace OHOS::AppExecFwk;
27
28 namespace OHOS {
29 namespace {
30 constexpr int INPUT_ZERO = 0;
31 constexpr int INPUT_ONE = 1;
32 constexpr int INPUT_TWO = 2;
33 constexpr int INPUT_THREE = 3;
34 constexpr size_t FOO_MAX_LEN = 1024;
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 const std::u16string APPMGR_INTERFACE_TOKEN = u"ohos.appexecfwk.AppMgr";
40 }
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
DoSomethingInterestingWithMyAPI(const char * data,size_t size)49 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
50 {
51 uint32_t code = GetU32Data(data) % (static_cast<uint32_t>(AppMgrInterfaceCode::JUDGE_SANDBOX_BY_PID) + 1);
52
53 MessageParcel parcel;
54 parcel.WriteInterfaceToken(APPMGR_INTERFACE_TOKEN);
55 parcel.WriteBuffer(data, size);
56 parcel.RewindRead(0);
57 MessageParcel reply;
58 MessageOption option;
59 std::shared_ptr<AppMgrService> appMgr = std::make_shared<AppMgrService>();
60 appMgr->OnRemoteRequest(code, parcel, reply, option);
61
62 return true;
63 }
64 }
65
66 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)67 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
68 {
69 /* Run your code on data */
70 if (data == nullptr) {
71 std::cout << "invalid data" << std::endl;
72 return 0;
73 }
74
75 /* Validate the length of size */
76 if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
77 return 0;
78 }
79
80 char* ch = (char*)malloc(size + 1);
81 if (ch == nullptr) {
82 std::cout << "malloc failed." << std::endl;
83 return 0;
84 }
85
86 (void)memset_s(ch, size + 1, 0x00, size + 1);
87 if (memcpy_s(ch, size, data, size) != EOK) {
88 std::cout << "copy failed." << std::endl;
89 free(ch);
90 ch = nullptr;
91 return 0;
92 }
93 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
94 free(ch);
95 ch = nullptr;
96 return 0;
97 }
98
99