       The Blowfish cipher implementation is licensed by Niels Provos under
       a 3-clause BSD license:

         * Blowfish - a fast block cipher designed by Bruce Schneier
         *
         * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
         * 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 name of the author may not be used to endorse or promote products
         *    derived from this software without specific prior written permission.
         *
         * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
         * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
         * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
         * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
         * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
         * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
         * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
         * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
         * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
