nodejs aee对称加解密

'use strict';
const crypto = require('crypto');

const key =  "2018201820182018",
        iv = "1234567887654321";

/**
 * Decryption 解密
 * @param data String - JSON字符串
 * @return utf8
 */
function AES_decryption(data) {
    let cipherChunks = [];
    let decipher = crypto.createDecipheriv('aes-128-cbc', key, iv);
    decipher.setAutoPadding(true);
    cipherChunks.push(decipher.update(data, 'base64', 'utf8'));
    cipherChunks.push(decipher.final('utf8'));
    return cipherChunks.join('');
}

/**
 * Encryption 加密
 * @param data String - 加密的是JSON字符串
 * @return base64
 *
 */
function AES_encryption(data) {
    let cipherChunks = [];
    let cipher = crypto.createCipheriv('aes-128-cbc', key, iv);
    cipher.setAutoPadding(true);
    cipherChunks.push(cipher.update(data, 'utf8', 'base64'));
    cipherChunks.push(cipher.final('base64'));
    return cipherChunks.join('');
}

let res1 = AES_encryption('abcd');
console.log(res1); // 8lCuwh5+vZrZmU1J9c9Alw==
                   // 8lCuwh5+vZrZmU1J9c9Alw==

let res2 = AES_decryption("8lCuwh5+vZrZmU1J9c9Alw==");
console.log(res2); // abcd