ryanbekhen / cryptkhen

Node.js library for simple implementation of encryption, decryption and digital signatures

CRYPTKHEN

Node.js library for simple implementation of encryption, decryption and digital signatures based on the Node.js crypto module

Features

• Encryption & Decryption (RSA, AES-256).
• Generate signature & verify (RSA)

Install

npm i @ryanbekhen/cryptkhen

Quick start

First of all, initialize:

import { AES256Encryption, RSAEncryption } from '@ryanbekhen/cryptkhen';
const aes256 = new AES256Encryption('secret');
const rsa = new RSAEncryption();

AES-256

Before encrypting data of type string, the data is first converted into a buffer. The encrypted data will be in the form of a buffer and converted to base64.

const data = Buffer.from('data');
const encryptedText = aes256.encrypt(data).toString('base64');

When decrypting encrypted text, the encrypted text will be converted into a buffer first. The decrypted data will be buffered and converted to a string.

const decryptedText = aes256.decrypt(Buffer.from(encryptedText, 'base64')).toString();

If you are encrypting a file that will produce an encrypted file, there is no need to change the encryption result to base64 because the encryption result in the form of a buffer will be written into a new file, for example it will be written in the data.enc file.

RSA

When generating a public key and a private key, the function defaults to using bits of size 2048 without a passphrase.

const pem = await rsa.generateKey();

Text encryption will produce encrypted text in base64 form.

const encryptedText = rsa.encrypt(pem.publicKey, 'data');

When decrypting encrypted text, a passphrase is required if at the time of generating the RSA key the passphrase is used.

const decryptedText = rsa.decrypt(pem.privateKey, encryptedText);

Create digital signatures based on verifiable data.

const signature = rsa.signature(pem.privateKey, 'data');

Verify signature authenticity.

const verify = rsa.isVerified(pem.publicKey, signature, 'data');

Contributing

Questions, comments, bug reports, and pull requests are all welcome.

License

This software is licensed under the Apache 2 license.

cryptkhen's Issues

Signature generator and verify

Feature

• add signature