how to return multiple with oracle function or procedure

I wrote the below oracle function for encrypt some data...   but oracle function not able to return multiple at a time..  

how to fix this?

Thanks in advance.

CREATE OR REPLACE PACKAGE BODY enc_dec

AS

     encryption_type    PLS_INTEGER := DBMS_CRYPTO.ENCRYPT_DES

                                     + DBMS_CRYPTO.CHAIN_CBC

                                     + DBMS_CRYPTO.PAD_PKCS5;

 

     encryption_key     RAW (32) := UTL_RAW.cast_to_raw('MyEncryptionKey');

randomizer_key     RAW (32) := UTL_RAW.cast_to_raw(randomizer);

         

     FUNCTION encrypt (uname VARCHAR2, randomizer VARCHAR2, passwrd VARCHAR2) RETURN RAW DETERMINISTIC

     IS

        encrypted_uname           RAW (2000);

encrypted_randomizer      RAW (2000);

encrypted_passwrd         RAW (2000);

     BEGIN

 

 encrypted_uname := DBMS_CRYPTO.ENCRYPT

        (

           src => UTL_RAW.CAST_TO_RAW (uname),