On 11/14/07, Yuri Dolgov <[EMAIL PROTECTED]> wrote:
>
> Hello Leo,
>
> For "no padding" modes there is no padding added to the data encrypted.
> Though
> you have to encrypt only data aligned to cipher block size.
Thank you, Yuri.
Now I know if "no padding" mode is adopted, how to manage the padding is
the job of the caller.
Thanks,
> Yuri
>
> On 11/14/07, Leo Li <[EMAIL PROTECTED]> wrote:
> >
> > Here is an exmple:
> >
> > byte[] data = ...; // data encrypted with DES-CBC-CRC
> > byte[] keyBytes = ...; // the DES key used to encrypt data.
> > final byte[] iv = new byte[]
> > { ( byte ) 0x00, ( byte ) 0x00, ( byte ) 0x00, ( byte ) 0x00, (
> > byte
> > ) 0x00, ( byte ) 0x00, ( byte ) 0x00,
> > ( byte ) 0x00 };
> > Cipher cipher = Cipher.getInstance( "DES/CBC/NoPadding" );
> > SecretKey key = new SecretKeySpec( keyBytes, "DES" );
> > AlgorithmParameterSpec paramSpec = new IvParameterSpec( iv );
> > cipher.init( Cipher.DECRYPT_MODE, key, paramSpec );
> > byte[] decryptedData = cipher.doFinal( data );
> >
> > Has the decryptedData got here already discarded the padding bytes?
> If
> > not, how to discard these data?
> >
> > Is there somebody familar with this?
> > Thanks in advance.
> >
> > --
> > Leo Li
> > China Software Development Lab, IBM
> >
>
--
Leo Li
China Software Development Lab, IBM
