Probably you could be interested in
@url{//www.gostls13.cypherpunks.ru/, Go's support of GOST TLS 1.3}.
+Example 34.10-2012-256 keypair generation, signing and verifying:
+
+@verbatim
+import (
+ "crypto/rand"
+ "io"
+ "go.cypherpunks.ru/gogost/v4/gost3410"
+ "go.cypherpunks.ru/gogost/v4/gost34112012256"
+)
+func main() {
+ data := []byte("data to be signed")
+ hasher := gost34112012256.New()
+ _, err := hasher.Write(data)
+ dgst := hasher.Sum(nil)
+ curve := gost3410.CurveIdtc26gost34102012256paramSetB()
+ prvRaw := make([]byte, int(gost3410.Mode2001))
+ _, err = io.ReadFull(rand.Reader, prvRaw)
+ prv, err := gost3410.NewPrivateKey(curve, gost3410.Mode2001, prvRaw)
+ pub, err := prv.PublicKey()
+ pubRaw := pub.Raw()
+ sign, err := prv.Sign(rand.Reader, dgst, nil)
+ pub, err = gost3410.NewPublicKey(curve, gost3410.Mode2001, pubRaw)
+ isValid, err := pub.VerifyDigest(dgst, sign)
+ if !isValid { panic("signature is invalid") }
+}
+@end verbatim
+
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