/**
 * PBKDF2 Key Derivation
 *
 * Legacy v1 key derivation using PBKDF2-SHA512.
 * This module extracts the existing PBKDF2 logic for backward compatibility.
 * Issue #1649
 */
import type { KdfResult, Pbkdf2Config } from "./types";
/**
 * Derive a key using PBKDF2
 *
 * @param password - User's password
 * @param config - PBKDF2 configuration from Cognito attributes
 * @returns KdfResult containing the derived 32-byte key
 */
export declare function derivePbkdf2(password: string, config: Pbkdf2Config): Promise<KdfResult>;