import { BinaryLike } from "crypto";
/**
 * DES encryption
 * @param data {BinaryLike} The data to encrypt
 * @param key {string|Buffer} The key to encrypt
 * @param iv {string|Buffer} The iv to encrypt,default is empty
 * @return {Buffer} The encrypted data
 */
export declare function desEncrypt(data: BinaryLike, key: string | Buffer, iv?: Buffer): Buffer;
/**
 * DES decryption
 * @param data {ArrayBufferView} The data to decrypt
 * @param key {string|Buffer} The key to decrypt
 * @param iv {string|Buffer} The iv to decrypt,default is empty
 * @return {Buffer} The decrypted data
 */
export declare function desDecrypt(data: NodeJS.ArrayBufferView, key: string | Buffer, iv?: Buffer): Buffer;