@li0ard/magma
Version:
Magma cipher implementation in pure TypeScript
33 lines (32 loc) • 1.49 kB
JavaScript
import { BLOCK_SIZE, Magma, sboxes } from "../";
import { cfb_encrypt, cfb_decrypt } from "@li0ard/gost3413";
/**
* Encrypts data using Cipher Feedback (CFB) mode with Magma cipher
*
* @param key Encryption key
* @param data Data to be encrypted
* @param iv Initialization vector
* @param legacy Enable backward compatibility with old GOST 28147-89
* @param sbox Optional substitution box, defaults to `ID_TC26_GOST_28147_PARAM_Z`
* @returns {Uint8Array}
*/
export const encryptCFB = (key, data, iv, legacy = false, sbox = sboxes.ID_TC26_GOST_28147_PARAM_Z) => {
const cipher = new Magma(legacy ? Magma.reverseKey(key) : key, sbox);
const encrypter = (buf) => (legacy ? cipher.encryptLegacy(buf) : cipher.encryptBlock(buf));
return cfb_encrypt(encrypter, BLOCK_SIZE, data, iv);
};
/**
* Decrypts data using Cipher Feedback (CFB) mode with Magma cipher
*
* @param key Encryption key
* @param data Data to be decrypted
* @param iv Initialization vector
* @param legacy Enable backward compatibility with old GOST 28147-89
* @param sbox Optional substitution box, defaults to `ID_TC26_GOST_28147_PARAM_Z`
* @returns {Uint8Array}
*/
export const decryptCFB = (key, data, iv, legacy = false, sbox = sboxes.ID_TC26_GOST_28147_PARAM_Z) => {
const cipher = new Magma(legacy ? Magma.reverseKey(key) : key, sbox);
const decrypter = (buf) => (legacy ? cipher.encryptLegacy(buf) : cipher.encryptBlock(buf));
return cfb_decrypt(decrypter, BLOCK_SIZE, data, iv);
};