import type { ServerNameList } from './0_server_name';
import { ServerNameExtension } from './0_server_name';
import type { ParsedSupportedGroups } from './10_supported_groups';
import { SupportedGroupsExtension } from './10_supported_groups';
import type { ParsedECPointFormats } from './11_ec_point_formats';
import { ECPointFormatsExtension } from './11_ec_point_formats';
import type { SignatureAlgorithms } from './13_signature_algorithms';
import { SignatureAlgorithmsExtension } from './13_signature_algorithms';
export declare const TLSExtensionsHandlers: {
    readonly server_name: typeof ServerNameExtension;
    readonly signature_algorithms: typeof SignatureAlgorithmsExtension;
    readonly supported_groups: typeof SupportedGroupsExtension;
    readonly ec_point_formats: typeof ECPointFormatsExtension;
};
export type SupportedTLSExtension = keyof typeof TLSExtensionsHandlers;
export type ParsedExtension = {
    type: 'server_name';
    data: ServerNameList;
    raw: Uint8Array;
} | {
    type: 'signature_algorithms';
    data: SignatureAlgorithms;
    raw: Uint8Array;
} | {
    type: 'ec_point_formats';
    data: ParsedECPointFormats;
    raw: Uint8Array;
} | {
    type: 'supported_groups';
    data: ParsedSupportedGroups;
    raw: Uint8Array;
};
/**
 * The extensions in a ClientHello message are encoded as follows:
 *
 * struct {
 *     ExtensionType extension_type;
 *     opaque extension_data<0..2^16-1>;
 * } Extension;
 *
 * The overall extensions structure is:
 *
 * Extension extensions<0..2^16-1>;
 *
 * This means:
 * •	There's a 2-byte length field for the entire extensions block.
 * •	Followed by zero or more individual extensions.
 *
 * Binary Data Layout
 *
 * +-----------------------------+
 * | Extension 1 Type (2 bytes)  |
 * +-----------------------------+
 * | Extension 1 Length (2 bytes)|
 * +-----------------------------+
 * | Extension 1 Data (variable) |
 * +-----------------------------+
 * | Extension 2 Type (2 bytes)  |
 * +-----------------------------+
 * | Extension 2 Length (2 bytes)|
 * +-----------------------------+
 * | Extension 2 Data (variable) |
 * +-----------------------------+
 * | ... (more extensions)       |
 * +-----------------------------+
 *
 * @param data
 * @returns
 */
export declare function parseClientHelloExtensions(data: Uint8Array): ParsedExtension[];