/**
 * aes算法加密/解密
 */
/// <reference types="node" />
interface EncryptReturn {
    keyStr: string;
    ivStr: string;
    encryptedData: string;
    rawBuffer: Buffer;
    base64Str: string;
}
export declare class AES {
    private static keyStr;
    private static algorithm;
    private static ivStr;
    private static ivByte;
    private static _instance;
    private cipher;
    constructor();
    static get instance(): AES;
    /**
     * aes 加密
     * @param {string} plaintext - 需要加密的字符串
     */
    aesEncrypt(plaintext: string): EncryptReturn;
    /**
     * aes 解密
     * @param {string} encryptedStr - 加密后的字符串
     */
    aesDecrypt(encryptedStr: string): string;
}
export {};