Node.js 破译. update()方法
原文:https://www . geesforgeks . org/node-js-decrypt-update-method/
decrypt . update()方法是加密模块内一个内置的 decrypt 类应用编程接口，用于根据给定的编码格式用数据更新解密。
语法:
const dicipher.update(data[, inputEncoding][, outputEncoding])
参数:该方法取以下参数:
- Data: Used to update and decrypt with new content.
- Enter code: Enter the code format.
- Output code: Output code format.
返回值:此方法不返回值。
示例 1: 文件名:index.js
java 描述语言
// Node.js program to demonstrate the
// decipher.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 decipher object
const key = crypto.scryptSync(password, 'salt', 24);
// Creating and initializing the static iv
const iv = Buffer.alloc(16, 0);
// Creating and initializing the decipher object
const decipher = crypto.createDecipheriv(algorithm, key, iv);
// Encrypted using same algorithm, key and iv.
const encrypted =
'e5f79c5915c02171eec6b212d5520d44480993d7d622a7c4c2da32f6efda0ffa';
// Updating the data into decipher object
let decrypted = decipher.update(encrypted, 'hex', 'utf8');
// Getting decrypted data
decrypted += decipher.final('utf8');
// Display the result
console.log("buffer :- " + decrypted);
输出:
buffer :- some clear text data
示例 2: 文件名:index . js
Javascript
// Node.js program to demonstrate the
// decipher.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 decipher object
const decipher = crypto
.createDecipheriv(algorithm, key, iv);
// Encrypted using same algorithm, key and iv.
const encrypted =
'e5f79c5915c02171eec6b212d5520d44480993d7d622a7c4c2da32f6efda0ffa';
// updating the data into decipher object
const decrypted = decipher.update(encrypted, 'hex', 'utf8');
console.log("buffer :- " + decipher);
});
输出:
buffer :- [object Object]
使用以下命令运行 index.js 文件:
node index.js
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