Java Retrieve the actual value of the public key from the KeyPair object

Question

I wanted to ask how to retrieve the actual values of the private and public keys from the KeyPair object because i need to export them and save in a database.

Answer 1

You can simply downcast to RSAPrivateKey and RSAPublicKey. Once you've done that you can access the methods of these classes.

RSAPublicKey pubKey = (RSAPublicKey) keyPair.getPublic());
BigInteger modulus = pubKey.getModulus();

etc.