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 "startusertestprocess_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "ability_record.h"
22 #include "app_mgr_client.h"
23 #include "configuration.h"
24 #include "parcel.h"
25 #include "securec.h"
26
27 using namespace OHOS::AAFwk;
28 using namespace OHOS::AppExecFwk;
29
30 namespace OHOS {
31 namespace {
32 constexpr int INPUT_ZERO = 0;
33 constexpr int INPUT_ONE = 1;
34 constexpr int INPUT_TWO = 2;
35 constexpr int INPUT_THREE = 3;
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 }
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 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)48 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
49 {
50 std::shared_ptr<AppMgrClient> appMgrClient = std::make_shared<AppMgrClient>();
51 if (!appMgrClient) {
52 return false;
53 }
54
55 // fuzz for want
56 Parcel wantParcel;
57 Want* want = nullptr;
58 if (wantParcel.WriteBuffer(data, size)) {
59 want = Want::Unmarshalling(wantParcel);
60 if (want) {
61 return false;
62 }
63 }
64 sptr<IRemoteObject> observer = nullptr;
65 BundleInfo bundleInfo;
66 int32_t userId = static_cast<int32_t>(GetU32Data(data));
67 if (appMgrClient->StartUserTestProcess(*want, observer, bundleInfo, userId) != 0) {
68 return false;
69 }
70 if (want) {
71 delete want;
72 want = nullptr;
73 }
74
75 return true;
76 }
77 }
78
79 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)80 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
81 {
82 /* Run your code on data */
83 if (data == nullptr) {
84 std::cout << "invalid data" << std::endl;
85 return 0;
86 }
87
88 /* Validate the length of size */
89 if (size < OHOS::U32_AT_SIZE) {
90 return 0;
91 }
92
93 char* ch = static_cast<char*>(malloc(size + 1));
94 if (ch == nullptr) {
95 std::cout << "malloc failed." << std::endl;
96 return 0;
97 }
98
99 (void)memset_s(ch, size + 1, 0x00, size + 1);
100 if (memcpy_s(ch, size, data, size) != EOK) {
101 std::cout << "copy failed." << std::endl;
102 free(ch);
103 ch = nullptr;
104 return 0;
105 }
106
107 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
108 free(ch);
109 ch = nullptr;
110 return 0;
111 }