oracle 创建md5函数

CREATE OR REPLACE FUNCTION MD5 (
 PASSWD IN VARCHAR2)
 RETURN VARCHAR2
 IS
  --PASSWD 需要加密的字符
  --REMARK:MD5加密
 retval varchar2(32);
 BEGIN
   retval := UTL_RAW.CAST_TO_RAW(DBMS_OBFUSCATION_TOOLKIT.MD5(INPUT_STRING => PASSWD));
 RETURN retval;
 END;

MD5('待加密字符串')