const unsigned char *label, size_t label_len,
const unsigned char *seed, size_t seed_len,
const size_t representation);
+/* KExp/KImp */
+int gost_kexp15(const unsigned char *shared_key, const int shared_len,
+ int cipher_nid, const unsigned char *cipher_key,
+ int mac_nid, unsigned char *mac_key,
+ const unsigned char *iv, const size_t ivlen,
+ unsigned char *out, int *out_len);
+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,
+ unsigned char *shared_key, size_t shared_len);
/*============== miscellaneous functions============================= */
/* from gost_sign.c */
/* Convert GOST R 34.11 hash sum to bignum according to standard */