Node.js cipher.update()方法
原文:https://www.geeksforgeeks.org/node-js-cipher-update-method/
cipher.update() 方法是加密模块内一个内置的类 cipher 应用编程接口，用于根据给定的编码格式用数据更新密码。
语法:
const cipher.update(data[, inputEncoding][, outputEncoding])
参数:该方法取以下参数:
- Data: Used to update the password according to the new content.
- Enter code: Enter the code format.
- Output code: Output code format.
返回值:该方法返回包含密码值的缓冲区对象。
示例 1: 文件名:index.js
java 描述语言
// Node.js program to demonstrate the
// cipher.update() method
// Importing crypto module
const crypto = require('crypto');
// Creating and initializing algorithm and password
const algorithm = 'aes-192-cbc';
const password = 'Password used to generate key';
// Getting key for the cipher object
const key = crypto.scryptSync(password, 'salt', 24);
// Creating and initializing the static iv
const iv = Buffer.alloc(16, 0);
// Creating and initializing the cipher object
const cipher = crypto.createCipheriv(algorithm, key, iv);
// Updating the cipher with the data
// by using update() method
let encrypted = cipher.update(
'some clear text data', 'utf8', 'hex');
// Getting the buffer data of cipher
encrypted += cipher.final('hex');
// Display the result
console.log(encrypted);
输出:
e5f79c5915c02171eec6b212d5520d44480993d7d622a7c4c2da32f6efda0ffa
示例 2: 文件名:index . js
Javascript
// Node.js program to demonstrate the
// cipher.update() method
// Importing crypto module
const crypto = require('crypto');
// Creating and initializing algorithm and password
const algorithm = 'aes-192-cbc';
const password = 'Password used to generate key';
// Getting key for cipher object
crypto.scrypt(password, 'salt', 24,
{ N: 512 }, (err, key) => {
if (err) throw err;
// Creating and initializing the static iv
const iv = Buffer.alloc(16, 0);
// Creating and initializing the cipher object
const cipher = crypto
.createCipheriv(algorithm, key, iv);
// Updating the cipher with the data
// by using update() method
let encrypted = cipher.update(
'some clear text data', 'utf8', 'hex');
// Getting the buffer data of cipher
encrypted += cipher.final('hex');
// Display the result
console.log(encrypted);
});
输出:
5850288b1848440f0c410400403f7b456293229b5231c17d2b83b602f252714b
使用以下命令运行 index.js 文件:
node index.js
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