@li0ard/kuznyechik/dist/modes/cfb.js

Kuznyechik cipher implementation in pure TypeScript

import { BLOCK_SIZE, Kuznyechik } from "../";
import { cfb_encrypt, cfb_decrypt } from "@li0ard/gost3413";
/**
 * Encrypts data using Cipher Feedback (CFB) mode with Kuznyechik cipher
 *
 * @param key Encryption key
 * @param data Data to be encrypted
 * @param iv Initialization vector
 * @returns {Uint8Array}
 */
export const encryptCFB = (key, data, iv) => {
    const cipher = new Kuznyechik(key);
    const encrypter = (buf) => cipher.encryptBlock(buf);
    return cfb_encrypt(encrypter, BLOCK_SIZE, data, iv);
};
/**
 * Decrypts data using Cipher Feedback (CFB) mode with Kuznyechik cipher
 *
 * @param key Encryption key
 * @param data Data to be decrypted
 * @param iv Initialization vector
 * @returns {Uint8Array}
 */
export const decryptCFB = (key, data, iv) => {
    const cipher = new Kuznyechik(key);
    const decrypter = (buf) => cipher.encryptBlock(buf);
    return cfb_decrypt(decrypter, BLOCK_SIZE, data, iv);
};