Node-side Decryption

1. Generate private key and save it as a pem file

const k = new NodeRSA({ b: 512 }); // 512 The larger the number, the harder it is to crack, but it takes longer
const data = k.generateKeyPair();
const privateKey = data.exportKey("pkcs8-private-pem");
fs.writeFileSync("privateKey.pem", privateKey, { encoding: "utf-8" });

0. Preface

Recently, I wanted to create an auto-reply feature for a WeChat Official Account, which led to this article. As for the choice of the backend server, a small server is sufficient, so there is no need to use Midway. Therefore, I hand-coded a simple Koa server.

1. Setting up the Backend Server

Generally, certificates are issued by secondary CAs, and root CAs issue secondary CAs.

Create Root CA

1. Use a tool to disguise the font.
2. Modify the registry to change Microsoft YaHei to the disguised font.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts]
"Microsoft YaHei & Microsoft YaHei UI (TrueType)"="D:\\Fonts\\MiSans\\msyh.ttc"
"Microsoft YaHei Bold & Microsoft YaHei UI Bold (TrueType)"="D:\\Fonts\\MiSans\\msyhbd.ttc"
"Microsoft YaHei Light & Microsoft YaHei UI Light (TrueType)"="D:\\Fonts\\MiSans\\msyhl.ttc"
"SimHei (TrueType)"="D:\\Fonts\\MiSans\\simhei.ttf"
"SimSun & NSimSun (TrueType)"="D:\\Fonts\\MiSans\\simsun.ttc"
"Segoe UI Variable (TrueType)"="D:\\Fonts\\MiSans\\SegUIVar.ttf"

Background

Seeing recent copyright infringement issues caused by fonts, I decided to use MiSans on my own website while redesigning it.

Getting Started

Initially, I tried importing the TTF directly, but the file was too large. The massive file size severely impacted loading efficiency. So, I checked the official MiSans website for their inclusion method:

Background

Because my West Data host cannot configure cross-origin resource sharing (CORS) for fonts, I decided to try using a CDN for acceleration.

About CDN

1. What is CDN?

CDN stands for Content Delivery Network. It is a distributed network built on top of the bearer network, consisting of edge node server clusters distributed in different regions.