/**
 * @module SecurePass
 */
/// <reference types="node" />
/**
 * Converts a buffer into url-safe base64.
 * @param buf - The Buffer to convert.
 */
export declare function bufferToSafeBase64(buf: Buffer): string;
/**
 * Converts a url-safe base64 string into a buffer.
 * @param base64 - The base64 string to convert.
 */
export declare function bufferFromSafeBase64(base64: string): Buffer;