-extern const EVP_CIPHER* cipher_gost_grasshopper_ecb();
-extern const EVP_CIPHER* cipher_gost_grasshopper_cbc();
-extern const EVP_CIPHER* cipher_gost_grasshopper_ofb();
-extern const EVP_CIPHER* cipher_gost_grasshopper_cfb();
-extern const EVP_CIPHER* cipher_gost_grasshopper_ctr();
+static int gost_grasshopper_mgm_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);