GOST 28147-89
The GOST 28147-89 block cipher uses a set of 4 bit Sboxes, however the standard does not actually define these Sboxes; they are considered a local configuration issue. Several different sets are used.
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Botan is released under the Simplified BSD License (see LICENSE.md)
(C) 1999-2009 Jack Lloyd (C) 2014-2015 Etienne Cimon
GOST 28147-89