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 #include "clouddaemonstub_fuzzer.h"
16
17 #include <cstddef>
18 #include <cstdint>
19 #include <map>
20 #include <iostream>
21
22 #include "cloud_daemon_stub.h"
23 #include "securec.h"
24 #include "message_parcel.h"
25 #include "cloud_file_daemon_interface_code.h"
26 #include "dfs_error.h"
27
28 namespace OHOS {
29
30 constexpr size_t FOO_MAX_LEN = 1024;
31 constexpr size_t U32_AT_SIZE = 4;
32
33 using namespace OHOS::FileManagement::CloudFile;
34 using namespace std;
35 using namespace OHOS::FileManagement;
36
37 const std::u16string CLOUD_DEAMON_TOKEN = u"ohos.filemanagement.distributedfile.clouddaemon";
38
39 namespace FileManagement {
40 namespace CloudFile {
41 class CloudDaemonStubImpl : public CloudDaemonStub {
42 public:
43 CloudDaemonStubImpl() = default;
~CloudDaemonStubImpl()44 ~CloudDaemonStubImpl() override {}
StartFuse(int32_t userId,int32_t deviceFd,const std::string & path)45 int32_t StartFuse(int32_t userId, int32_t deviceFd, const std::string &path) override
46 {
47 return E_OK;
48 }
49 };
50 }
51 }
52
HandleStartFuseInnerFuzzTest(std::shared_ptr<CloudDaemonStub> cloudDaemonStubStr,std::unique_ptr<char[]> data,size_t size)53 void HandleStartFuseInnerFuzzTest(
54 std::shared_ptr<CloudDaemonStub> cloudDaemonStubStr,
55 std::unique_ptr<char[]> data, size_t size)
56 {
57 // CLOUD_DAEMON_CMD_START_FUSE
58 uint32_t code = static_cast<uint32_t>(CloudFileDaemonInterfaceCode::CLOUD_DAEMON_CMD_START_FUSE);
59 MessageParcel datas;
60 datas.WriteInterfaceToken(CLOUD_DEAMON_TOKEN);
61 datas.WriteBuffer(data.get(), size);
62 datas.RewindRead(0);
63 MessageParcel reply;
64 MessageOption option;
65
66 cloudDaemonStubStr->OnRemoteRequest(code, datas, reply, option);
67 }
68
69 } // namespace OHOS
70
71 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)72 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
73 {
74 /* Run your code on data */
75 if (data == nullptr) {
76 return 0;
77 }
78
79 /* Validate the length of size */
80 if (size < OHOS::U32_AT_SIZE || size > OHOS::FOO_MAX_LEN) {
81 return 0;
82 }
83
84 auto str = std::make_unique<char[]>(size + 1);
85 (void)memset_s(str.get(), size + 1, 0x00, size + 1);
86 if (memcpy_s(str.get(), size, data, size) != EOK) {
87 return 0;
88 }
89
90 auto cloudDaemonStubStr = std::make_shared<OHOS::CloudDaemonStubImpl>();
91
92 OHOS::HandleStartFuseInnerFuzzTest(cloudDaemonStubStr, move(str), size);
93 return 0;
94 }
95