In case somebody is interested in more information, here are some references:
Original GOST 28147-89 cipher specs translated in English
http://vipul.net/gost/papers/gost-spec.ps.gz
http://vipul.net/gost/papers/russian-des.ps.gz
GOST 28147-89 mathematical analysis
http://vipul.net/gost/papers/further-comments.ps.gz
Original GOST R 34.11-94 hash algorithm specs translated in English
http://www.cl.cam.ac.uk/users/mrr/gost/gost34.11.dvi (incomplete)
C implementation and test vectors
http://www.tcs.hut.fi/~mjos/gosthash.tar.gz
Additional cryptographic algorithms for use with GOST 28147-89, GOST R
34.10-94, GOST R 34.10-2001, and GOST R 34.11-94 algorithms (Vladimir Popov,
Igor Kurepkin, Serguei Leontiev)
http://cnscenter.future.co.kr/resource/ietf/ind-draft/draft-popov-cryptopro-cp
algs-01.txt
Many GOST documents translations for a reasonable prices
http://www.eastview.com/xq/ASP/ics_code=35.040/f_start_value=1/f_ml=20/browse_
order=gost_english/browse_order_asc=asc/f_locale=_cyr/qx/russian/standards/bro
wse_standard.asp
IAIK-JCE API GOST Java implementation
http://jce.iaik.tugraz.at/products/01_jce/documentation/javadoc/iaik/security/
cipher/GOST.html
Respectfully yours,
Vladislav "SATtva" Miller
http://www.pgpru.com