import { Config } from './types/config';
import { HashResult } from './types/typings';
/**
 * Class for hashing and verifying sl-user passwords
 */
export declare class UserHashing {
    private legacy;
    private pwdCouch;
    private iterations;
    private pbkdf2Prf;
    private keyLength;
    private saltLength;
    constructor(config: Partial<Config>);
    isUpgradeNeeded(hashObj: HashResult): boolean;
    hashUserPassword(password: string): Promise<HashResult>;
    verifyUserPassword(hashObj: HashResult, pw: string): Promise<boolean>;
    private static createPwdModule;
}