var crypto = require('crypto');

var aesutil = module.exports = {};

/**
 * aes加密
 * @param data 待加密内容
 * @param key 必须为32位私钥
 * @returns {string}
 */
aesutil.encryption = function (data, key, iv) {
 iv = iv || "";
 var clearEncoding = 'utf8';
 var cipherEncoding = 'base64';
 var cipherChunks = [];
 var cipher = crypto.createCipheriv('aes-256-ecb', key, iv);
 cipher.setAutoPadding(true);
 cipherChunks.push(cipher.update(data, clearEncoding, cipherEncoding));
 cipherChunks.push(cipher.final(cipherEncoding));
 return cipherChunks.join('');
}

/**
 * aes解密
 * @param data 待解密内容
 * @param key 必须为32位私钥
 * @returns {string}
 */
aesutil.decryption = function (data, key, iv) {
 if (!data) {
  return "";
 }
 iv = iv || "";
 var clearEncoding = 'utf8';
 var cipherEncoding = 'base64';
 var cipherChunks = [];
 var decipher = crypto.createDecipheriv('aes-256-ecb', key, iv);
 decipher.setAutoPadding(true);
 cipherChunks.push(decipher.update(data, cipherEncoding, clearEncoding));
 cipherChunks.push(decipher.final(clearEncoding));
 return cipherChunks.join('');
}
 

var key = "12345678"  //秘钥必须为：8/16/32位
var message = "123456";

//加密
var encrypt = CryptoJS.AES.encrypt(message, CryptoJS.enc.Utf8.parse(key), {
 mode: CryptoJS.mode.ECB,
 padding: CryptoJS.pad.Pkcs7
});
console.log("value: "+encrypt);

//解密
var decrypt = CryptoJS.AES.decrypt(encrypt, CryptoJS.enc.Utf8.parse(key), {
 mode: CryptoJS.mode.ECB,
 padding: CryptoJS.pad.Pkcs7
});
console.log("value: "+decrypt.toString(CryptoJS.enc.Utf8));