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 "defaultappproxy_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #define private public
22 #include "default_app_proxy.h"
23 #include "securec.h"
24
25 using Want = OHOS::AAFwk::Want;
26 using namespace OHOS::AppExecFwk;
27 namespace OHOS {
28 constexpr size_t FOO_MAX_LEN = 1024;
29 constexpr size_t U32_AT_SIZE = 4;
30 constexpr size_t MESSAGE_SIZE = 4;
31 constexpr size_t DCAMERA_SHIFT_24 = 24;
32 constexpr size_t DCAMERA_SHIFT_16 = 16;
33 constexpr size_t DCAMERA_SHIFT_8 = 8;
34
GetU32Data(const char * ptr)35 uint32_t GetU32Data(const char* ptr)
36 {
37 return (ptr[0] << DCAMERA_SHIFT_24) | (ptr[1] << DCAMERA_SHIFT_16) | (ptr[2] << DCAMERA_SHIFT_8) | (ptr[3]);
38 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)39 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
40 {
41 Want want;
42 std::string type(data, size);
43 bool isDefaultApp = true;
44 int32_t userId = reinterpret_cast<uintptr_t>(data);
45 MessageParcel datas;
46 std::u16string descriptor = DefaultAppProxy::GetDescriptor();
47 datas.WriteInterfaceToken(descriptor);
48 datas.WriteBuffer(data, size);
49 datas.RewindRead(0);
50 BundleInfo bundleInfo;
51 MessageParcel reply;
52 sptr<IRemoteObject> object;
53 DefaultAppProxy defaultAppProxy(object);
54 defaultAppProxy.IsDefaultApplication(type, isDefaultApp);
55 defaultAppProxy.GetDefaultApplication(userId, type, bundleInfo);
56 defaultAppProxy.SetDefaultApplication(userId, type, want);
57 defaultAppProxy.ResetDefaultApplication(userId, type);
58 defaultAppProxy.SendRequest(DefaultAppInterfaceCode::IS_DEFAULT_APPLICATION, datas, reply);
59
60 return true;
61 }
62 }
63
64 // Fuzzer entry point.
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)65 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
66 {
67 /* Run your code on data */
68 if (data == nullptr) {
69 return 0;
70 }
71
72 if (size < OHOS::U32_AT_SIZE) {
73 return 0;
74 }
75
76 /* Validate the length of size */
77 if (size > OHOS::FOO_MAX_LEN) {
78 return 0;
79 }
80
81 char* ch = static_cast<char*>(malloc(size + 1));
82 if (ch == nullptr) {
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 free(ch);
89 ch = nullptr;
90 return 0;
91 }
92 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
93 free(ch);
94 ch = nullptr;
95 return 0;
96 }