/**
 * @return {hmac_sha256_constructor}
 */
export function get_hmac_sha256_instance(): hmac_sha256_constructor;
export class hmac_sha256_constructor extends hmac_constructor {
}
export namespace hmac_sha256_constructor {
    const BLOCK_SIZE: number;
    const HMAC_SIZE: number;
}
import { hmac_constructor } from "./hmac";