if (!CryptGenKey(hCryptProv, CALG_GR3412_2015_K, CRYPT_EXPORTABLE, &cKey)) {
        HandleError("Couldn't generate symmetric key");
    }

 DWORD dParam = CRYPT_MODE_CTR;
    
    if (!CryptSetKeyParam(cKey, KP_MODE, (BYTE*)&dParam, NULL)) {
        HandleError("Couldn't set encrypt mod");
    }
 dParam = CRYPT_ACPKM_MODE;

    if (!CryptSetKeyParam(cKey, KP_MIXMODE, (BYTE*)&dParam, NULL)) {
        HandleError("Couldn't set mixmode");
    }

BYTE msgToEncode[8] = { 0x92, 0xde, 0xf0, 0x6b, 0x3c, 0x13, 0x0a, 0x59 };
DWORD bufLen = sizeof(msgToEncode);

if (!CryptCreateHash(hCryptProv, CALG_GR3413_2015_K_IMIT, cKey, NULL, &hash)) {
        HandleError("Couldn't create hash");
    }

 if (!CryptHashData(hash, msgToEncode, bufLen, NULL)) {
        HandleError("Couldn't hash msg");
    }