/**
* Translate an RSA key into a SunRsaSign RSA key. If conversion is not possible, throw an
* InvalidKeyException. See also JCA doc.
*/
protected Key engineTranslateKey(Key key) throws InvalidKeyException {
if (key == null) {
throw new InvalidKeyException("Key must not be null");
}
String keyAlg = key.getAlgorithm();
if (keyAlg.equals("RSA") == false) {
throw new InvalidKeyException("Not an RSA key: " + keyAlg);
}
if (key instanceof PublicKey) {
return translatePublicKey((PublicKey) key);
} else if (key instanceof PrivateKey) {
return translatePrivateKey((PrivateKey) key);
} else {
throw new InvalidKeyException("Neither a public nor a private key");
}
}
