1 Pure Python 2.7/3.x GOST cryptographic functions library.
3 GOST is GOvernment STandard of Russian Federation (and Soviet Union).
5 * GOST 28147-89 (RFC 5830) block cipher with ECB, CNT (CTR), CFB, MAC,
6 CBC (RFC 4357) modes of operation
7 * various 28147-89-related S-boxes included
8 * GOST R 34.11-94 hash function (RFC 5831)
9 * GOST R 34.11-94 based PBKDF2 function
10 * GOST R 34.11-2012 Стрибог (Streebog) hash function (RFC 6986)
11 * GOST R 34.10-2001 (RFC 5832) public key signature function
12 * GOST R 34.10-2012 (RFC 7091) public key signature function
13 * various 34.10 curve parameters included
14 * VKO GOST R 34.10-2001 key agreement function (RFC 4357)
15 * VKO GOST R 34.10-2012 key agreement function (RFC 7836)
16 * 28147-89 and CryptoPro key wrapping (RFC 4357)
17 * 28147-89 CryptoPro key meshing for CFB mode (RFC 4357)
18 * RFC 4491 (using GOST algorithms with X.509) compatibility helpers
19 * GOST R 34.12-2015 128-bit block cipher Кузнечик (Kuznechik) (RFC 7801)
20 * GOST R 34.13-2015 padding methods
21 * PEP247-compatible hash/MAC functions
23 Known problems: low performance and non time-constant calculations.
25 Example 34.10-2012 keypair generation, signing and verifying:
27 >>> from pygost.gost3410 import CURVE_PARAMS
28 >>> from pygost.gost3410 import GOST3410Curve
29 >>> curve = GOST3410Curve(*CURVE_PARAMS["GostR3410_2012_TC26_ParamSetA"])
30 >>> from os import urandom
31 >>> prv_raw = urandom(32)
32 >>> from pygost.gost3410 import prv_unmarshal
33 >>> prv = prv_unmarshal(prv_raw)
34 >>> from pygost.gost3410 import public_key
35 >>> pub = public_key(curve, prv)
36 >>> from pygost.gost3410 import pub_marshal
37 >>> from pygost.utils import hexenc
38 >>> print "Public key is:", hexenc(pub_marshal(pub))
39 >>> from pygost import gost34112012256
40 >>> data_for_signing = b"some data"
41 >>> dgst = gost34112012256.new(data_for_signing).digest()
42 >>> from pygost.gost3410 import sign
43 >>> signature = sign(curve, prv, dgst, mode=2012)
44 >>> from pygost.gost3410 import verify
45 >>> verify(curve, pub, dgst, signature, mode=2012)
48 Other examples can be found in docstrings.
50 PyGOST is free software: see the file COPYING for copying conditions.
52 PyGOST'es home page is: http://www.cypherpunks.ru/pygost/
53 You can read about GOST algorithms more: http://www.cypherpunks.ru/gost/
55 Please send questions, bug reports and patches to
56 https://lists.cypherpunks.ru/mailman/listinfo/gost
57 mailing list. Announcements also go to this mailing list.
59 Development Git source code repository currently is located here:
60 http://git.cypherpunks.ru/cgit.cgi/pygost.git/