MGF1ParameterSpec mgfParams = (MGF1ParameterSpec)pSpec.getMGFParameters();
Digest digest = JCEDigestUtil.getDigest(mgfParams.getDigestAlgorithm());
if (digest == null)
{
throw new NoSuchPaddingException("no match on OAEP constructor for digest algorithm: "+ mgfParams.getDigestAlgorithm());
}
cipher = new OAEPEncoding(new RSABlindedEngine(), digest, ((PSource.PSpecified)pSpec.getPSource()).getValue());
paramSpec = pSpec;
}