cipher.update()方法是加密模塊內的Cipher類的內置應用程序編程接口,用於根據給定的編碼格式用數據更新密碼。
用法:
const cipher.update(data[, inputEncoding][, outputEncoding])
參數:此方法采用以下參數:
- data:它用於通過新內容更新密碼。
- inputEncoding:輸入編碼格式。
- outputEncoding:輸出編碼格式。
返回值:此方法返回包含密碼值的緩衝區的對象。
範例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);
輸出:
e5f79c5915c02171eec6b212d5520d44480993d7d622a7c4c2da32f6efda0ffa
範例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);
});
輸出:
5850288b1848440f0c410400403f7b456293229b5231c17d2b83b602f252714b
使用以下命令運行index.js文件:
node index.js
相關用法
- Node.js console.timeLog()用法及代碼示例
- Node.js fs.fsyncSync()用法及代碼示例
- Node.js process.nextTick()用法及代碼示例
- Node.js GM charcoal()用法及代碼示例
- Node.js GM blur()用法及代碼示例
- Node.js GM sharpen()用法及代碼示例
- Node.js GM drawLine()用法及代碼示例
- Node.js GM drawArc()用法及代碼示例
- Node.js GM drawPolyline()用法及代碼示例
- Node.js GM drawBezier()用法及代碼示例
- Node.js GM drawCircle()用法及代碼示例
注:本文由純淨天空篩選整理自RohitPrasad3大神的英文原創作品 Node.js cipher.update() Method。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。