1 /*
2 * Copyright (c) 2023 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 "backupsa_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20 #include <cstring>
21
22 #include <climits>
23 #include "message_parcel.h"
24 #include "service_stub.h"
25 #include "service.h"
26 #include "securec.h"
27 #include "system_ability.h"
28
29 #include "filemgmt_libhilog.h"
30
31 using namespace OHOS::FileManagement::Backup;
32
33 namespace OHOS {
34 constexpr size_t U32_AT_SIZE = 4;
35 constexpr uint8_t MAX_CALL_TRANSACTION = 24;
36 constexpr int32_t SERVICE_ID = 5203;
37
GetU32Data(const char * ptr)38 uint32_t GetU32Data(const char* ptr)
39 {
40 // 将第0个数字左移24位，将第1个数字左移16位，将第2个数字左移8位，第3个数字不左移
41 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
42 }
43
BackupSaFuzzTest(const uint8_t * data,size_t size)44 bool BackupSaFuzzTest(const uint8_t *data, size_t size)
45 {
46 if (data == nullptr || size < U32_AT_SIZE) {
47 return true;
48 }
49
50 sptr service = sptr(new Service(SERVICE_ID));
51 uint32_t code = GetU32Data(reinterpret_cast<const char*>(data));
52 if (code == 0) {
53 return true;
54 }
55 MessageParcel datas;
56 datas.WriteInterfaceToken(ServiceStub::GetDescriptor());
57 datas.WriteBuffer(reinterpret_cast<const char*>(data + U32_AT_SIZE), size - U32_AT_SIZE);
58 datas.RewindRead(0);
59 MessageParcel reply;
60 MessageOption option;
61 service->OnRemoteRequest(code % MAX_CALL_TRANSACTION, datas, reply, option);
62 service = nullptr;
63 return true;
64 }
65 } // namespace OHOS
66
67 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t dataSize)68 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t dataSize)
69 {
70 try {
71 OHOS::BackupSaFuzzTest(data, dataSize);
72 } catch (OHOS::FileManagement::Backup::BError &err) {
73 HILOGE("BackupSaFuzzTest error");
74 } catch (...) {
75 HILOGE("BackupSaFuzzTest exception");
76 }
77 return 0;
78 }