Re: [tor-dev] Proposal 189: AUTHORIZE and AUTHORIZED cells

On Sun, Nov 06, 2011 at 01:45:43AM +0100, George Kadianakis wrote:

3.1. AUTHORIZE cell

The AUTHORIZE cell is a variable-sized cell.

The generic AUTHORIZE cell format is:

     AuthMethod                       [1 octet]
     MethodFields                     [...]
     PadLen                           [2 octets]
     Padding                          ['PadLen' octets]

Why include PadLen and Padding? A variable-sized cell already says how big it is. So the client can pick a size for the variable-sized cell (the client has to anyway), and then any unused space is unused.

The AUTHORIZED cell format is:

     'AuthMethod'                       [1 octet]
     'PadLen'                           [2 octets]
     'Padding'                          ['PadLen' octets]

Same here.

--Roger