/** Kuznyechik core class */
export declare class Kuznyechik {
    private roundKeys;
    /**
     * Kuznyechik core class
     * @param key Encryption key
     */
    constructor(key: Uint8Array);
    /**
     * Returns round keys
     */
    getRoundKeys(): Uint8Array[];
    /**
     * `X`-transformation.
     *
     * The input of the `X` function is two sequences, and the output of the function is the XOR of these two sequences.
     */
    transformX(a: Uint8Array, b: Uint8Array): Uint8Array;
    /**
     * `S`-transformation.
     *
     * The `S` function is a regular substitution function.
     * Each byte of the input sequence is replaced by the corresponding byte from
     * the `PI` substitution table.
     */
    transformS(input: Uint8Array): Uint8Array;
    /**
     * `Srev`-transformation
     *
     * The `Srev` function is a regular substitution function.
     * Each byte of the input sequence is replaced by the corresponding byte from
     * the `PI_REV` substitution table.
     */
    transformS_rev(input: Uint8Array): Uint8Array;
    /**
     * Performs Galois Field (GF(2)) multiplication.
     *
     * This method multiplies two bytes in the Galois Field using bitwise operations,
     * applying the irreducible polynomial x^8 + x^7 + x^6 + x + 1 for modular reduction.
     */
    gfMultiply(a: number, b: number): number;
    /**
     * `R`-transformation
     *
     * Performs a linear transformation on the input block by cyclically shifting bytes
     * and applying Galois Field multiplication with a predefined linear transformation matrix (`L`).
     */
    transformR(input: Uint8Array): Uint8Array;
    /**
     * `Rrev`-transformation
     *
     * Performs a linear transformation on the input block by applying Galois Field multiplication
     * with a predefined linear transformation matrix (`L`) and cyclically shifting bytes.
     */
    transformR_rev(input: Uint8Array): Uint8Array;
    /**
     * `L`-transformation
     *
     * Performs a linear transformation on the input block by repeatedly applying the `R`-transformation
     * a fixed number of times (equal to the block size).
     */
    transformL(input: Uint8Array): Uint8Array;
    /**
     * `Lrev`-transformation
     *
     * Performs a linear transformation on the input block by repeatedly applying the `Rrev`-transformation
     * a fixed number of times (equal to the block size).
     */
    transformL_rev(input: Uint8Array): Uint8Array;
    /**
     * `F`-transformation aka `XSLX`-algorithm
     *
     * Performs a key transformation using a series of linear and substitution transformations.
     */
    transformF(in_key1: Uint8Array, in_key2: Uint8Array, iter_constant: Uint8Array): Uint8Array[];
    /**
     * Encrypts single block of data using Kuznyechik encryption algorithm.
     * @param block Block to be encrypted
     * @returns {Uint8Array} Encrypted block
     * @throws {CipherError} Block size is invalid or data is too short
     */
    encryptBlock(block: Uint8Array): Uint8Array;
    /**
     * Decrypts single block of data using Kuznyechik encryption algorithm.
     * @param block Block to be decrypted
     * @returns {Uint8Array} Decrypted block
     * @throws {CipherError} Block size is invalid or data is too short
     */
    decryptBlock(block: Uint8Array): Uint8Array;
}
export * from "./const";
export * from "./modes/acpkm";
export * from "./modes/cbc";
export * from "./modes/cfb";
export * from "./modes/ctr";
export * from "./modes/ecb";
export * from "./modes/mac";
export * from "./modes/mgm";
export * from "./modes/ofb";
export * from "./modes/kexp";