* Compute MAC of given length in bits from data, using non-zero 8-byte IV
* (non-standard, for use in CryptoPro key transport only
*/
-int gost_mac_iv(gost_ctx * c, int mac_len, const unsigned char *iv,
+int gost_mac_iv(gost_ctx * ctx, int mac_len, const unsigned char *iv,
const unsigned char *data, unsigned int data_len,
unsigned char *mac);
/* Perform one step of MAC calculation like gostcrypt */