aes.js

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, iv) {
    iv = iv || "";
    var clearEncoding = 'utf8';
    var cipherEncoding = 'base64';
    var cipherChunks = [];
    var cipher = crypto.createCipheriv('aes-256-ctr', crypto.pbkdf2Sync(iv, '', 100000, 32, 'sha512'), crypto.createHash('sha1').update(iv).digest().slice(0, 16));
    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, iv) {
    if (!data) {
        return "";
    }
    iv = iv || "";
    var clearEncoding = 'utf8';
    var cipherEncoding = 'base64';
    var cipherChunks = [];
    var decipher = crypto.createDecipheriv('aes-256-ctr', crypto.pbkdf2Sync(iv, '', 100000, 32, 'sha512'), crypto.createHash('sha1').update(iv).digest().slice(0, 16));
    decipher.setAutoPadding(true);
    cipherChunks.push(decipher.update(data, cipherEncoding, clearEncoding));
    cipherChunks.push(decipher.final(clearEncoding));
    return cipherChunks.join('');
};