/**
 * Implementation of GOST R 34.12-2015 ([RFC 8891](https://datatracker.ietf.org/doc/html/rfc8891.html)) and GOST 28147-89 ([RFC 5830](https://datatracker.ietf.org/doc/html/rfc5830.html))
 * "Magma" block ciphers
 *
 * Differences between GOST R 34.12-2015 and GOST 28147-89:
 * - GOST R 34.12-2015 uses fixed S-Box (`ID_TC26_GOST_28147_PARAM_Z`)
 * - GOST R 34.12-2015 uses BE byte order (instead of LE in GOST 28147-89)
 * @module
 */
import { type TArg, type TRet } from "@noble/curves/utils.js";
import type { Cipher } from "../types.js";
/** Magma (GOST R 34.12-2015 and GOST 28147-89) cipher */
export declare class Magma implements Cipher {
    private key;
    private sbox;
    isLegacy: boolean;
    readonly keySize = 32;
    readonly blockSize = 8;
    /**
     * Magma (GOST R 34.12-2015 and GOST 28147-89) cipher
     * @param key Encryption key
     * @param sbox S-Box
     * @param isLegacy Use GOST 28147-89 instead of GOST R 34.12-2015?
     */
    constructor(key: TArg<Uint8Array>, sbox?: TArg<Uint8Array>, isLegacy?: boolean);
    proceedBlock(block: TArg<Uint8Array>, sequence: number[]): TRet<Uint8Array>;
    encrypt(plaintext: TArg<Uint8Array>): TRet<Uint8Array>;
    decrypt(ciphertext: TArg<Uint8Array>): TRet<Uint8Array>;
}
export { magmaSboxes, magmaKeySequences } from "./const.js";