AES_CBC_MAC_Setkey
void AES_CBC_MAC_Setkey(void *, const uint8_t *, u_int);
AES_CBC_MAC_Setkey(&ctx->cbc_mac, key, len);
.Setkey = AES_CBC_MAC_Setkey,
.Setkey = AES_CBC_MAC_Setkey,
.Setkey = AES_CBC_MAC_Setkey,