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
28namespace OHOS {
29
30constexpr size_t FOO_MAX_LEN = 1024;
31constexpr size_t U32_AT_SIZE = 4;
32
33using namespace OHOS::FileManagement::CloudFile;
34using namespace std;
35using namespace OHOS::FileManagement;
36
37const std::u16string CLOUD_DEAMON_TOKEN = u"ohos.filemanagement.distributedfile.clouddaemon";
38
39namespace FileManagement {
40namespace CloudFile {
41class CloudDaemonStubImpl : public CloudDaemonStub {
42public:
43    CloudDaemonStubImpl() = default;
44    ~CloudDaemonStubImpl() override {}
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
53void 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 */
72extern "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