2020-07-29 js使用AES加解密
2020-08-04 本文已影响0人
Armin0202
背景
越来越严格的安全要求，迫使前端需要对交互报文进行加密。
方案
选择了AES加密方案
实现
AES-CBC
const aesjs = require('aes-js')
function CryptoCbc ({ key, iv }) {
this.key = aesjs.utils.utf8.toBytes(key)
this.iv = aesjs.utils.utf8.toBytes(iv)
}
// 加密
CryptoCbc.prototype.encrypt = function (text) {
let aesCbc = new aesjs.ModeOfOperation.cbc(this.key, this.iv)
let textBytes = aesjs.padding.pkcs7.pad(aesjs.utils.utf8.toBytes(text)) // 使用PKCS7Padding填充
let encryptedBytes = aesCbc.encrypt(textBytes)
let encryptedHex = aesjs.utils.hex.fromBytes(encryptedBytes) // 得到加密字符串
return encryptedHex
}
// 解密
CryptoCbc.prototype.decrypt = function (encryptedHex) {
let aesCbc = new aesjs.ModeOfOperation.cbc(this.key, this.iv)
let encryptedBytes = aesjs.utils.hex.toBytes(encryptedHex)
var decryptedBytes = aesjs.padding.pkcs7.strip(aesCbc.decrypt(encryptedBytes))
let decryptedText = aesjs.utils.utf8.fromBytes(decryptedBytes)
return decryptedText
}
let cryptoCbc = new CryptoCbc({
key: '39067A6F8088F81E9C2BB5D46A8C0F60', // 32位
iv: 'EFEF3C38B05F5871' // 16位
})
let text = 'wEis11elYDR1aPWX123' // 待加密文本
let encryptedHex = cryptoCbc.encrypt(text) // 加密结果
let decryptedText = cryptoCbc.decrypt(encryptedHex) // 解密结果
console.log(encryptedHex)
console.log(decryptedText)
AES-ECB
const aesjs = require('aes-js')
function CryptoEcb ({ key }) {
this.key = aesjs.utils.utf8.toBytes(key)
}
// 加密
CryptoEcb.prototype.encrypt = function (text) {
let aesEcb = new aesjs.ModeOfOperation.ecb(this.key)
let textBytes = aesjs.padding.pkcs7.pad(aesjs.utils.utf8.toBytes(text))
let encryptedBytes = aesEcb.encrypt(textBytes)
let encryptedHex = aesjs.utils.hex.fromBytes(encryptedBytes) // 得到加密字符串
return encryptedHex
}
// 解密
CryptoEcb.prototype.decrypt = function (encryptedHex) {
let aesEcb = new aesjs.ModeOfOperation.ecb(this.key)
let encryptedBytes = aesjs.utils.hex.toBytes(encryptedHex)
var decryptedBytes = aesjs.padding.pkcs7.strip(aesEcb.decrypt(encryptedBytes))
let decryptedText = aesjs.utils.utf8.fromBytes(decryptedBytes)
return decryptedText
}
let cryptoEcb = new CryptoEcb({
key: '39067A6F8088F81E9C2BB5D46A8C0F60', // 32位
})
let text = 'wEis11elYDR1aPWX123' // 待加密文本
let encryptedHex = cryptoEcb.encrypt(text) // 加密结果
let decryptedText = cryptoEcb.decrypt(encryptedHex) // 解密结果
console.log(encryptedHex)
console.log(decryptedText)
