dsh-encrypt: DSH Credential Encryption Plugin
dsh-encrypt is a DSH credential encryption plugin maintained by yauntyour (MIT license, current version 0.1.0-rc.12), designed to convert local plaintext credential files in-place into password-protected ciphertext while preserving the original file paths. The plugin employs a dual-form single-file mechanism: without a password, it remains as plaintext YAML, and once encrypted, it is replaced with AES-256-GCM ciphertext, with the key derived via Argon2id and integrity verified using SHA3-256. Core features include: password digest computation on the browser side to protect privacy, an exponential backoff mechanism to prevent brute-force attacks on unlock failure, automatic redaction of credentials in HTTP responses, and strict security restrictions allowing only localhost loopback connections. The plugin supports passwordless tickets, hot reloading, atomic writes, and memory cleanup to ensure sensitive data does not persist in logs or...
Read MoreEncapsulation in Java Classes: Hiding Internal Details, Exposing Only Necessary Interfaces
This article introduces the core of Java encapsulation: hiding internal class details and only exposing necessary interfaces to ensure data security and logical rationality. Encapsulation is implemented through access modifiers: using `private` to hide attributes (such as a student's `name` and `age`), which cannot be directly modified from outside; exposing interfaces through `public` methods (such as `setName` and `setAge`), with logical validation added within the methods (e.g., age cannot be negative). By comparing a wrong example (directly exposing attributes leading to illegal modifications) with a correct implementation (private attributes + validated methods), encapsulation can prevent data chaos (e.g., maintaining age within a reasonable range), achieve modularization (separation of internal and external), and enhance maintainability (internal logic changes do not affect the outside). Encapsulation is a foundation of Java's object-oriented programming. By hiding details and exposing secure interfaces, it ensures code robustness and is a key factor in writing high-quality code.
Read MoreEncapsulation in C++: Hiding Attributes and Exposing Interfaces
This article focuses on C++ encapsulation, with the core principle being "hiding internal details while exposing necessary interfaces." Encapsulation is a key principle in object-oriented programming, similar to how a mobile phone can be used without understanding its internal structure. In C++, access modifiers achieve this: `private` hides a class's internal properties (default), accessible only by the class itself; `public` exposes external interfaces for external calls. The necessity of encapsulation lies in preventing data chaos. For example, if a student class directly exposes attributes like age and scores, they might be set to negative values or out-of-range values. Encapsulation addresses this by using `private` members combined with `public` interfaces, where validation logic (e.g., age must be positive) is embedded in the interfaces to ensure data security. The core benefits of encapsulation are threefold: first, data security by preventing arbitrary external modification; second, centralized logic through unified validation rules in interfaces; third, reduced coupling, as external code only needs to focus on interface calls without understanding internal implementations. In summary, encapsulation serves as a "shield" in C++ class design. By hiding details and exposing interfaces, it ensures data security while making the code modular and easy to maintain.
Read MoreImplementing MySQL Database Master-Slave Replication
This document provides a detailed introduction to how to configure Master-Slave Replication in MySQL database, accompanied by configuration steps and simple test cases. The key points summarized are as follows: ### Configuration Steps #### 1. Select servers as master and slave - Choose one MySQL server as the master and another as the slave. #### 2. Setup on the master server - First, add the following configurations to the master's `/etc/my.cnf` or `my.ini` configuration file:
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