title: BouncyCastle create AsymmetricCipherKeyPair from existing keys?
body: <p>I have two <code>AssymetricAlgorithm</code> RSA keys that I have pulled out of a certificate that was in my keystore. One is the Public Key and the other the Private. Is there a way of getting this keypair into a BouncyCastle AsymmetricCipherKeyPair? BouncyCastle's <code>AsymmetricCipherKeyPair</code> expects a public and private <code>AsymmetricKeyParameter</code> however I have no way of getting my Private key without it being an instance of <code>AssymetricAlgorithm</code>.</p>