int gost_kimp15(const unsigned char *expkey, const size_t expkeylen,
int cipher_nid, const unsigned char *cipher_key,
int mac_nid, unsigned char *mac_key,
const unsigned char *iv, const size_t ivlen,
int gost_kimp15(const unsigned char *expkey, const size_t expkeylen,
int cipher_nid, const unsigned char *cipher_key,
int mac_nid, unsigned char *mac_key,
const unsigned char *iv, const size_t ivlen,