cipher.update()方法是加密模块内的Cipher类的内置应用程序编程接口,用于根据给定的编码格式用数据更新密码。
用法:
const cipher.update(data[, inputEncoding][, outputEncoding])
参数:此方法采用以下参数:
- data:它用于通过新内容更新密码。
- inputEncoding:输入编码格式。
- outputEncoding:输出编码格式。
返回值:此方法返回包含密码值的缓冲区的对象。
范例1: 文件名:index.js
Javascript
// Node.js program to demonstrate the
// cipher.update() method
// Importing crypto module
const crypto = require('crypto');
// Creating and initializng algorith 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 initializg the static iv
const iv = Buffer.alloc(16, 0);
// Creating and initializng 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
范例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 initializng algorith 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 initializg the static iv
const iv = Buffer.alloc(16, 0);
// Creating and initializng 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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注:本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 Node.js cipher.update() Method。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。