/**
 * Crypto Utilities
 * Helper functions for crypto operations
 *
 * Ported from hawcx-wasm/core/crypto/utils.js
 */
import type { DeviceInfo } from "./types";
/**
 * Get device information (BUI and OS type)
 */
export declare function getDeviceInfo(): DeviceInfo;
/**
 * Format algorithm string for info field
 */
export declare function formatAlgorithmString(dhAlgorithm: string, dhCurve: string, signAlgorithm: string): string;
/**
 * Build info string for wrapping
 * Format: useragent + os + algorithm + version (no separator)
 */
export declare function buildInfoString(useragent: string, os: string, algorithm: string, version: string): string;