Encrypt and Decrypt with DES3Encrypt Oracle

Hi
I have a function

create or replace function endecrypt_fnc(
  inValue  varchar2,  --Value to en/decrypt
  inMethod varchar2  --'E' Encrypt; 'D' Decrypt
) return varchar2
is
  loResult         varchar2(4096) ;
  loKey            VARCHAR2(24) := 'QWERTYUIASDFGHJKZXCVBNM,';
  lovalue          VARCHAR2(4096) ;
  loMethod         varchar2(1);
  error_in_input_buffer_length EXCEPTION;
  PRAGMA EXCEPTION_INIT(error_in_input_buffer_length, -28232);
  INPUT_BUFFER_LENGTH_ERR_MSG VARCHAR2(100) := '*** DES INPUT BUFFER NOT A MULTIPLE OF 8 BYTES ***';
  i number;
BEGIN
  if inValue is null then
    return null;
  end if;
  loValue := inValue;
  loMethod := upper(inMethod);
  if loMethod='E' THEN
    loResult :=  dbms_obfuscation_toolkit.DES3Encrypt(
       input_string => loValue,
       key_string => loKey,
       which => 1);
  end if;
  if loMethod='D' THEN
    loResult :=  dbms_obfuscation_toolkit.DES3Decrypt(
       input_string => loValue,
       key_string => loKey,
       which => 1);
  end if;
  return loResult;

EXCEPTION
WHEN error_in_input_buffer_length THEN
  dbms_output.put_line('> ' || INPUT_BUFFER_LENGTH_ERR_MSG);

end endecrypt_fnc;

I tested with some values below:
  endecrypt_fnc(endecrypt_fnc('12345678','E'),'D') it's ok
but when i tested
  endecrypt_fnc(endecrypt_fnc('913122875       ','E'),'D') the return value does not match.

---length('913122875       ')=16----

Let me know what something wrong, pls?
Thanks
HieuTD
hieutdAsked:
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seazodiacCommented:
try to use a longer key 32 bytes.
---> loKey            VARCHAR2(24) := 'QWERTYUIASDFGHJKZXCVBNM,';
loKey            VARCHAR2(24) := 'IDLSFDKLQWERTYUIASDFGHJKZXCVBNM,';
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