/// <reference types="node" />
import * as tls from 'tls';
import { IAuthentication } from '../interfaces/Authentication.js';
import { ILogger } from '../interfaces/Logger.js';
interface IGoogleLDAPAuthOptions {
    /** base DN
     *  e.g. 'dc=hokify,dc=com', */
    base: string;
    searchBase?: string;
    tls: {
        keyFile: string;
        certFile: string;
    };
    /** tls options
     * e.g. {
            key: fs.readFileSync('ldap.gsuite.key'),
            cert: fs.readFileSync('ldap.gsuite.crt')
        } */
    tlsOptions?: tls.TlsOptions;
}
export declare class GoogleLDAPAuth implements IAuthentication {
    private base;
    private config;
    private searchBase;
    private dnsFetch;
    private logger;
    constructor(config: IGoogleLDAPAuthOptions, logger: ILogger);
    private fetchDNs;
    authenticate(username: string, password: string, count?: number, forceFetching?: boolean): Promise<boolean>;
}
export {};