Access to advanced cryptographic functionalities.
    public class Crypto : Reference

The Crypto class allows you to access some more advanced cryptographic functionalities in Godot.

For now, this includes generating cryptographically secure random bytes, and RSA keys and self-signed X509 certificates generation. More functionalities are planned for future releases.


extends Node

var crypto =

var key =

var cert =

func _ready():

Generate new RSA key.

key = crypto.generate_rsa(4096)

Generate new self-signed certificate with the given key.

cert = crypto.generate_self_signed_certificate(key, “,O=My Game Company,C=IT”)

Save key and certificate in the user folder.“user://generated.key”)“user://generated.crt”)


Inheritance Chain


    public Crypto()


    public byte[] GenerateRandomBytes(int size)

Generates a PoolByteArray of cryptographically secure random bytes with given size.

    public CryptoKey GenerateRsa(int size)

Generates an RSA CryptoKey that can be used for creating self-signed certificates and passed to StreamPeerSSL.AcceptStream(Godot.StreamPeer, Godot.CryptoKey, Godot.X509Certificate, Godot.X509Certificate).

    public X509Certificate GenerateSelfSignedCertificate(CryptoKey key, string issuerName = "CN=myserver,O=myorganisation,C=IT", string notBefore = "20140101000000", string notAfter = "20340101000000")

Generates a self-signed X509Certificate from the given CryptoKey and issuerName. The certificate validity will be defined by notBefore and notAfter (first valid date and last valid date). The issuerName must contain at least “CN=” (common name, i.e. the domain name), “O=” (organization, i.e. your company name), “C=” (country, i.e. 2 lettered ISO-3166 code of the country the organization is based in).

A small example to generate an RSA key and a X509 self-signed certificate.


var crypto =

Generate 4096 bits RSA key.

var key = crypto.generate_rsa(4096)

Generate self-signed certificate using the given key.

var cert = crypto.generate_self_signed_certificate(key, “,O=A Game Company,C=IT”)