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Home Page: http://gogost.cypherpunks.ru
License: GNU General Public License v3.0
Cypherpunks.ru gogost mirror
Home Page: http://gogost.cypherpunks.ru
License: GNU General Public License v3.0
Pure Go GOST cryptographic functions library. GOST is GOvernment STandard of Russian Federation (and Soviet Union). * GOST 28147-89 (RFC 5830) block cipher with ECB, CNT (CTR), CFB, MAC CBC (RFC 4357) modes of operation * various 28147-89-related S-boxes included * GOST R 34.11-94 hash function (RFC 5831) * GOST R 34.11-2012 Стрибог (Streebog) hash function (RFC 6986) * GOST R 34.10-2001 (RFC 5832) public key signature function * GOST R 34.10-2012 (RFC 7091) public key signature function * various 34.10 curve parameters included * Coordinates conversion from twisted Edwards to Weierstrass form and vice versa * VKO GOST R 34.10-2001 key agreement function (RFC 4357) * VKO GOST R 34.10-2012 key agreement function (RFC 7836) * 28147-89 and CryptoPro key wrapping (RFC 4357) * KDF_GOSTR3411_2012_256 KDF function (RFC 7836) * GOST R 34.12-2015 128-bit block cipher Кузнечик (Kuznechik) (RFC 7801) * GOST R 34.12-2015 64-bit block cipher Магма (Magma) * GOST R 34.13-2015 padding methods * MGM AEAD mode for 64 and 128 bit ciphers (RFC 9058) * TLSTREE keyscheduling function * ESPTREE/IKETREE (IKE* is the same as ESP*) keyscheduling function * PRF_IPSEC_PRFPLUS_GOSTR3411_2012_{256,512} and generic prf+ functions (Р 50.1.111-2016 with IKEv2 RFC 7296) Probably you could be interested in Go's support of GOST TLS 1.3 (http://www.gostls13.cypherpunks.ru/). Known problems: * intermediate calculation values are not zeroed * 34.10 is not time constant and slow Example 34.10-2012-256 keypair generation, signing and verifying: import ( "crypto/rand" "io" "github.com/thefish/gogost/v5/gost3410" "github.com/thefish/gogost/v5/gost34112012256" ) func main() { data := []byte("data to be signed") hasher := gost34112012256.New() _, err := hasher.Write(data) dgst := hasher.Sum(nil) curve := gost3410.CurveIdtc26gost341012256paramSetB() prvRaw := make([]byte, int(32)) _, err = io.ReadFull(rand.Reader, prvRaw) prv, err := gost3410.NewPrivateKey(curve, prvRaw) pub, err := prv.PublicKey() pubRaw := pub.Raw() sign, err := prv.Sign(rand.Reader, dgst, nil) pub, err = gost3410.NewPublicKey(curve, pubRaw) isValid, err := pub.VerifyDigest(dgst, sign) if !isValid { panic("signature is invalid") } } GoGOST is free software: see the file COPYING for copying conditions. GoGOST'es home page is: http://www.gogost.cypherpunks.ru/ You can read about GOST algorithms more: http://www.gost.cypherpunks.ru/ Please send questions, bug reports and patches to http://lists.cypherpunks.ru/gost.html mailing list. Announcements also go to this mailing list. Development Git source code repository currently is located here: http://www.git.cypherpunks.ru/?p=gogost.git;a=summary
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