(Ruby) Generate an RSA Key and Get as Base64 DER

Demonstrates how to generate a 2048-bit RSA key and return the public and private parts as unencrypted Base64 encoded DER.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

success = false

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

rsa = Chilkat::CkRsa.new()

# Generate a 2048-bit key.
privKey = Chilkat::CkPrivateKey.new()
success = rsa.GenKey(2048,privKey)
if (success == false)
    print rsa.lastErrorText() + "\n";
    exit
end

# Get the public part of the key.
pubKey = Chilkat::CkPublicKey.new()
privKey.ToPublicKey(pubKey)

# There are two possible formats for representing the RSA public key 
# in ASN.1 (DER).  The possible formats are PKCS1 and PKCS8.
# We can get either by setting bChoosePkcs1 to true or false.
bChoosePkcs1 = true
pubKeyBase64Der = pubKey.getEncoded(bChoosePkcs1,"base64")
print "Public Key Base64 DER:" + "\n";
print pubKeyBase64Der + "\n";

# Get the private key as Base64 DER:
# We can get PKCS1 or PKCS8, but with different methods:
privKeyPkcs1 = privKey.getPkcs1ENC("base64")
print "Private Key PKCS1 Base64 DER:" + "\n";
print privKeyPkcs1 + "\n";

privKeyPkcs8 = privKey.getPkcs8ENC("base64")
print "Private Key PKCS8 Base64 DER:" + "\n";
print privKeyPkcs8 + "\n";