/* KDF TREE */
int gost_kdftree2012_256(unsigned char *keyout, size_t keyout_len,
const unsigned char *key, size_t keylen,
const unsigned char *label, size_t label_len,
const unsigned char *seed, size_t seed_len,
const size_t representation);
/* KDF TREE */
int gost_kdftree2012_256(unsigned char *keyout, size_t keyout_len,
const unsigned char *key, size_t keylen,
const unsigned char *label, size_t label_len,
const unsigned char *seed, size_t seed_len,
const size_t representation);