A little question of a license

[Leopold Palomo-Avellaneda <leo@alaxarxa.net>]

Hi,

I would like to ask if a software that contains a file with this:
--------------------------------------------------------------------------
 Copyright (C) 2005, XXXXXX
   All rights reserved.

  Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

     1. Redistributions of source code must retain the above copyright
        notice, this list of conditions and the following disclaimer.

     2. Redistributions in binary form must reproduce the above copyright
        notice, this list of conditions and the following disclaimer in the
        documentation and/or other materials provided with the distribution.

     3. The names of its contributors may not be used to endorse or promote
        products derived from this software without specific prior written
        permission.

--------------------------------------------------------------------------

could be in main? (so is dfsg)

I think that yes, but I must admit that the legal stuff is something unclear 
to me. Something as the classical licenses are clear, but this custom makes 
me crazy.

Regards,

Leo