/**
 * Calculates the MD5 hash of a file
 * @param filename - the filename of file to hash
 * @returns - The MD5 hash of input file
 */
export default function md5File(filename?: string): string;
/**
 * Calculates the MD5 hash of a string.
 *
 * @param  {String} input - The string (or buffer).
 * @return {String}        - The MD5 hash.
 */
export declare function md5(input: string): string;