KeyFactory keyFactory = KeyFactory.getInstance("RSA");
RSAPublicKeySpec publicSpec = keyFactory.getKeySpec(this.pubKey, RSAPublicKeySpec.class);
BigInteger modulus = publicSpec.getModulus();
BigInteger exponent = publicSpec.getPublicExponent();
BASE64Encoder base64Encoder = new BASE64Encoder();
this.pubModulus = base64Encoder.encodeBuffer(modulus.toByteArray());
this.pubExponent = base64Encoder.encodeBuffer(exponent.toByteArray());
}
/**
*