Code examples for asymmetric encryption in Node.js
This article mainly shares with you the Node.js asymmetric encryption method and code examples. Friends who are interested in this can refer to it.
Preface
I just answered the question "Asymmetric decryption error" raised by a brother on SegmentFault. This is a security application of Node.js. There should be many people encountering the same problem. Based on the questions answered, here is a brief summary.
For theoretical knowledge of asymmetric encryption, you can refer to the author's previous article "NODEJS Advanced: CRYPTO Module Theory".
The complete code can be found in "Nodejs Learning Notes". You are also welcome to pay attention to programmer Xiaoka's GitHub.
Encryption and decryption methods
In Node.js, the module responsible for security is crypto. In asymmetric encryption, public key encryption, private key decryption, and the corresponding APIs for encryption and decryption are as follows.
Encryption function:
crypto.publicEncrypt(key, buffer)
Decryption function:
crypto.privateDecrypt(privateKey, buffer)
Getting started example
Assume that there is the following utils.js
// utils.js
const crypto = require('crypto');
// 加密方法
exports.encrypt = (data, key) => {
// 注意，第二个参数是Buffer类型
return crypto.publicEncrypt(key, Buffer.from(data));
};
// 解密方法
exports.decrypt = (encrypted, key) => {
// 注意，encrypted是Buffer类型
return crypto.privateDecrypt(key, encrypted);
};Test code app .js:
const utils = require('./utils'); const keys = require('./keys'); const plainText = '你好，我是程序猿小卡'; const crypted = utils.encrypt(plainText, keys.pubKey); // 加密 const decrypted = utils.decrypt(crypted, keys.privKey); // 解密 console.log(decrypted.toString()); // 你好，我是程序猿小卡
Attached are the public key and private key keys.js:
exports.privKey = `-----BEGIN RSA PRIVATE KEY----- MIICXQIBAAKBgQDFWnl8fChyKI/Tgo1ILB+IlGr8ZECKnnO8XRDwttBbf5EmG0qV 8gs0aGkh649rb75I+tMu2JSNuVj61CncL/7Ct2kAZ6CZZo1vYgtzhlFnxd4V7Ra+ aIwLZaXT/h3eE+/cFsL4VAJI5wXh4Mq4Vtu7uEjeogAOgXACaIqiFyrk3wIDAQAB AoGBAKdrunYlqfY2fNUVAqAAdnvaVOxqa+psw4g/d3iNzjJhBRTLwDl2TZUXImEZ QeEFueqVhoROTa/xVg/r3tshiD/QC71EfmPVBjBQJJIvJUbjtZJ/O+L2WxqzSvqe wzYaTm6Te3kZeG/cULNMIL+xU7XsUmslbGPAurYmHA1jNKFpAkEA48aUogSv8VFn R2QuYmilz20LkCzffK2aq2+9iSz1ZjCvo+iuFt71Y3+etWomzcZCuJ5sn0w7lcSx nqyzCFDspQJBAN3O2VdQF3gua0Q5VHmK9AvsoXLmCfRa1RiKuFOtrtC609RfX4DC FxDxH09UVu/8Hmdau8t6OFExcBriIYJQwDMCQQCZLjFDDHfuiFo2js8K62mnJ6SB H0xlIrND2+/RUuTuBov4ZUC+rM7GTUtEodDazhyM4C4Yq0HfJNp25Zm5XALpAkBG atLpO04YI3R+dkzxQUH1PyyKU6m5X9TjM7cNKcikD4wMkjK5p+S2xjYQc1AeZEYq vc187dJPRIi4oC3PN1+tAkBuW51/5vBj+zmd73mVcTt28OmSKOX6kU29F0lvEh8I oHiLOo285vG5ZtmXiY58tAiPVQXa7eU8hPQHTHWa9qp6 -----END RSA PRIVATE KEY----- `; exports.pubKey = `-----BEGIN PUBLIC KEY----- MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDFWnl8fChyKI/Tgo1ILB+IlGr8 ZECKnnO8XRDwttBbf5EmG0qV8gs0aGkh649rb75I+tMu2JSNuVj61CncL/7Ct2kA Z6CZZo1vYgtzhlFnxd4V7Ra+aIwLZaXT/h3eE+/cFsL4VAJI5wXh4Mq4Vtu7uEje ogAOgXACaIqiFyrk3wIDAQAB -----END PUBLIC KEY----- `;
The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.
Related articles:
How to implement the image preview function in the WeChat applet
How to implement Baidu statistics using vue
How to use WeChat applet to achieve the effect of MUI number input box
Basic usage of render function in Vue (detailed tutorial)
How to use the gallery slider component in the WeChat applet
How to use the scroll-view component to implement scrolling animation in the WeChat applet
Usage of checkbox component in WeChat mini program
The above is the detailed content of Code examples for asymmetric encryption in Node.js. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1664
14
1422
52
1316
25
1267
29
1239
24
Detailed graphic explanation of the memory and GC of the Node V8 engine
Mar 29, 2023 pm 06:02 PM
This article will give you an in-depth understanding of the memory and garbage collector (GC) of the NodeJS V8 engine. I hope it will be helpful to you!
An article about memory control in Node
Apr 26, 2023 pm 05:37 PM
The Node service built based on non-blocking and event-driven has the advantage of low memory consumption and is very suitable for handling massive network requests. Under the premise of massive requests, issues related to "memory control" need to be considered. 1. V8’s garbage collection mechanism and memory limitations Js is controlled by the garbage collection machine
Let's talk about how to choose the best Node.js Docker image?
Dec 13, 2022 pm 08:00 PM
Choosing a Docker image for Node may seem like a trivial matter, but the size and potential vulnerabilities of the image can have a significant impact on your CI/CD process and security. So how do we choose the best Node.js Docker image?
Node.js 19 is officially released, let's talk about its 6 major features!
Nov 16, 2022 pm 08:34 PM
Node 19 has been officially released. This article will give you a detailed explanation of the 6 major features of Node.js 19. I hope it will be helpful to you!
Let's talk in depth about the File module in Node
Apr 24, 2023 pm 05:49 PM
The file module is an encapsulation of underlying file operations, such as file reading/writing/opening/closing/delete adding, etc. The biggest feature of the file module is that all methods provide two versions of **synchronous** and **asynchronous**, with Methods with the sync suffix are all synchronization methods, and those without are all heterogeneous methods.
Let's talk about the event loop in Node
Apr 11, 2023 pm 07:08 PM
The event loop is a fundamental part of Node.js and enables asynchronous programming by ensuring that the main thread is not blocked. Understanding the event loop is crucial to building efficient applications. The following article will give you an in-depth understanding of the event loop in Node. I hope it will be helpful to you!
Let's talk about how to use pkg to package Node.js projects into executable files.
Dec 02, 2022 pm 09:06 PM
How to package nodejs executable file with pkg? The following article will introduce to you how to use pkg to package a Node project into an executable file. I hope it will be helpful to you!
What should I do if node cannot use npm command?
Feb 08, 2023 am 10:09 AM
The reason why node cannot use the npm command is because the environment variables are not configured correctly. The solution is: 1. Open "System Properties"; 2. Find "Environment Variables" -> "System Variables", and then edit the environment variables; 3. Find the location of nodejs folder; 4. Click "OK".
