/// <reference types="node" />
import { ClientUser } from './UserPool';
import { Session } from './Session';
export declare class ClientPasswordChallenge {
    poolname: string;
    user: ClientUser;
    private a;
    private A;
    constructor(poolname: string, user: ClientUser, a: string | Buffer);
    calculateA(): Buffer;
    getSession(B: string, salt: string): Session;
}