AlgorithmIdentifier getAlgorithmIdentifier( ASN1ObjectIdentifier encryptionOID, AlgorithmParameters params) throws CMSException { ASN1Encodable asn1Params; if (params != null) { asn1Params = CMSUtils.extractParameters(params); } else { asn1Params = DERNull.INSTANCE; } return new AlgorithmIdentifier(encryptionOID, asn1Params); }