This is a simple package that provides a russian cryptography algorithm "kuznechik" (GOST 34.12-2018)

How to install

To install this package enter command below to terminal: npm install cryptokuznechik

Usage

To use this package firstly you need to choose one of the encryption mods:

• ECB
• OFB
• CFB
• CTR
• OFB

ECB

For ECB you need to import class ECB from package:

import {ECB} from 'cryptokuznechik';

Next create an instance of ECB:

let ecb:ECB = new ECB();

Now you can encrypt and decrypt messages:

const fs = require('fs');
let inputString: string = fs.readFileSync("input.txt", "utf8");
let encrypted: Buffer = ecb.Encrypt(Buffer.from(inputString));

let result: Buffer = ecb.Decrypt(encrypted);

CBC

For CBC you need to import class CBC from package:

import {CBC} from 'cryptokuznechik';

Next create an instance of CBC:

let cbc:CBC = new CBC();

Now encrypt and decrypt messages:

let buffer: Buffer = Buffer.from(inputString);
let cbc_enc: Buffer = cbc.Encrypt(buffer);
let result: Buffer = cbc.Decrypt(cbc_enc);

CFB

For CFB you need to import class CFB from package:

import {CFB} from 'cryptokuznechik';

Next create an instance of CFB:

let cfb:CFB = new CFB();

Now encrypt and decrypt messages:

let cfb_enc: Buffer = cfb.Encrypt(buffer);
let result: Buffer = cfb.Decrypt(cfb_enc);

CTR

For CTR you need to import class CTR from package:

import {CTR} from 'cryptokuznechik';

Next create an instance of CTR:

let ctr:CTR = new CTR();

Now encrypt and decrypt messages:

let ctr_enc: Buffer = ctr.Encrypt(buffer);
let result: Buffer = ctr.Decrypt(ctr_enc);

OFB

For OFB you need to import class OFB from package:

import {OFB} from 'cryptokuznechik';

Next create an instance of OFB:

let ofb:OFB = new OFB();

Now encrypt and decrypt messages:

let ofb_enc: Buffer = ofb.Encrypt(buffer);
let result: Buffer = ofb.Decrypt(ofb_enc);

Other

You also can create your own encryption mode with Kuznec:

import {Kuznec} from 'cryptokuznechik'

let kuz: Kuznec = new Kuznec();
let block: Buffer = Buffer.from('plainTextBlock12');
let encrypted_block: Buffer = kuz.Encryption(block);
let decrypted_block: Buffer = kuz.Decryption(encrypted_block);
console.log(decrypted_block.toString('utf-8')); //// plainTextBlock12

Authors

* lokt02
* KostylevVadim

Special thanks

* PotatoHD404