* 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://gostls13.cypherpunks.ru/).
+
Known problems:
* intermediate calculation values are not zeroed