/**
 * Get the SPN the same way Chrome/Firefox or IE does.
 *
 * Links:
 * - getting the domain name: https://stackoverflow.com/questions/8498592/extract-hostname-name-from-string
 * - algo of IE : https://support.microsoft.com/en-us/help/4551934/kerberos-failures-in-internet-explorer
 *
 * @param {string} url
 * @returns {string}
 */
export declare function getSPNFromURI(url: string): Promise<string>;
export declare function encodeBase64(str: string): string;
export declare function md5(str: string): string;