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 "common_utils.h"
17 namespace OHOS::AppDomainVerify {
18 constexpr int MAX_STEP = 3;
19 constexpr size_t MAX_MASK_LEN = 100;
MaskStr(const std::string & input)20 std::string MaskStr(const std::string& input)
21 {
22     if (input.empty()) {
23         return "";
24     }
25     auto len = input.length();
26     auto maskLen = std::min(len, MAX_MASK_LEN);
27     std::string ret(maskLen, ' ');
28     for (auto i = 0; i < maskLen; i++) {
29         if (i % MAX_STEP == 0) {
30             ret[i] = input[i];
31         } else {
32             ret[i] = '*';
33         }
34     }
35     return ret;
36 }
37 }