nonce, record[recordHeaderLen:], record[:recordHeaderLen])
		} else {
			additionalData := append(hc.scratchBuf[:0], hc.seq[:]...)
			additionalData = append(additionalData, record[:recordHeaderLen]...)
			record = c.Seal(record, nonce, payload, additionalData)
		}
	case cbcMode:
		mac := tls10MAC(hc.mac, hc.scratchBuf[:0], hc.seq[:], record[:recordHeaderLen], payload, nil)
		blockSize := c.BlockSize()