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 FOO_MAX_LEN = 1024;
37 constexpr size_t U32_AT_SIZE = 4;
38 constexpr size_t OFFSET_ZERO = 24;
39 constexpr size_t OFFSET_ONE = 16;
40 constexpr size_t OFFSET_TWO = 8;
41 }
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 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)49 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
50 {
51 std::shared_ptr<AppMgrClient> appMgrClient = std::make_shared<AppMgrClient>();
52 if (!appMgrClient) {
53 return false;
54 }
55
56 // fuzz for want
57 Parcel wantParcel;
58 Want* want = nullptr;
59 if (wantParcel.WriteBuffer(data, size)) {
60 want = Want::Unmarshalling(wantParcel);
61 if (want) {
62 return false;
63 }
64 }
65 sptr<IRemoteObject> observer = nullptr;
66 BundleInfo bundleInfo;
67 int32_t userId = static_cast<int32_t>(GetU32Data(data));
68 if (appMgrClient->StartUserTestProcess(*want, observer, bundleInfo, userId) != 0) {
69 return false;
70 }
71 if (want) {
72 delete want;
73 want = nullptr;
74 }
75
76 return true;
77 }
78 }
79
80 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)81 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
82 {
83 /* Run your code on data */
84 if (data == nullptr) {
85 std::cout << "invalid data" << std::endl;
86 return 0;
87 }
88
89 /* Validate the length of size */
90 if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
91 return 0;
92 }
93
94 char* ch = static_cast<char*>(malloc(size + 1));
95 if (ch == nullptr) {
96 std::cout << "malloc failed." << std::endl;
97 return 0;
98 }
99
100 (void)memset_s(ch, size + 1, 0x00, size + 1);
101 if (memcpy_s(ch, size, data, size) != EOK) {
102 std::cout << "copy failed." << std::endl;
103 free(ch);
104 ch = nullptr;
105 return 0;
106 }
107
108 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
109 free(ch);
110 ch = nullptr;
111 return 0;
112 }