rsa-cts2 v1.0.8

Module to implement RSA protocol.

npm i --save rsa-cts2

const rsa = require('rsa-cts2');

rsa.getRSAKeys(bitlength);

Get a pair of RSA keys (private and public) in a base 16 string. The parameter bitlength specifies the number of bits of p and q. Default bitlength is 1024. Returns and object:

{ privateKey: (privateKey object), publicKey: (publicKey object) }

A privateKey object has the structure:

{ d: (string in base 16), n: (string in base 16) }

A prublicKey object has the structure:

{ e: (string in base 16), n: (string in base 16) }

privateKey.sign(mssg);

Signs mssg with private key, which is a hex string. Returns a string in base 16.

privateKey.decrypt(mssg);

Decrypts mssg, previously encrypted with public key. Is a string in base 16. Returns an string object.

pyblicKey.encrypt(mssg);

Encrypts mssg with public key, which is a hex string. Returns a string in base 16.

publicKey.verify(mssg);

Verifies mssg, previously signed with private key. Is a string in base 16. Returns an string object.

rsa.privateKey(key);

Converts an object with the form

{ d: (string in base 16), n: (string in base 16) }

into a rsa privateKey object.

rsa.publicKey(key);

Converts an object with the form

{ e: (string in base 16), n: (string in base 16) }

into a rsa publiceKey object.

rsa.hexToUTF8(hexStr);

Converts a hex String to UTF8

Example

const msg = "Message";

const keys = rsa.getRSAKeys(512);
const hexMsg = Buffer.from(msg).toString('hex')
const c = keys.privateKey.sign(hexMsg);

const d = keys.publicKey.verify(c);
const initialMsg= rsa.hexToUTF8(d);
console.log(initialMsg) //out = Message