Node.js cipher.final() 方法

cipher.final()方法是加密模块中 Cipher 类的内置应用程序编程接口，用于返回包含密码对象值的缓冲区。

句法：

const cipher.final([outputEncoding])

参数：此方法将输出编码作为参数。

返回值：此方法返回包含密码值的缓冲区对象。

示例 1：文件名：index.js

Javascript

// Node.js program to demonstrate the
// cipher.final() 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);
 
// Getting buffer value
// by using final() method
let value = cipher.final('hex');
 
// Display the result
console.log("buffer :- " + value);

输出：

buffer :- b9be42878310d599e4e49e040d1badb9

示例 2：文件名：index.js

Javascript

// Node.js program to demonstrate the
// cipher.final() 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);
 
        // Getting buffer value
        // by using final() method
        let value = cipher.final('hex');
 
        // Display the result
        console.log("buffer :- " + value);
    });

输出：

buffer :- 726cccfc7d80ca473d8d4de1a0a42675

使用以下命令运行 index.js 文件：

node index.js

参考： https ://nodejs.org/dist/latest-v12.x/docs/api/crypto.html#crypto_cipher_final_outputencoding