Method SerializeTo

layers/eapol.go:244–297

SerializeTo writes the serialized form of this layer into the SerializationBuffer, implementing gopacket.SerializableLayer. See the docs for gopacket.SerializableLayer for more info.

(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions)

// SerializationBuffer, implementing gopacket.SerializableLayer.
// See the docs for gopacket.SerializableLayer for more info.
func (ek *EAPOLKey) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error {
	buf, err := b.PrependBytes(eapolKeyFrameLen + len(ek.EncryptedKeyData))
	if err != nil {
		return err
	}

	buf[0] = byte(ek.KeyDescriptorType)

	var info uint16
	info |= uint16(ek.KeyDescriptorVersion)
	info |= uint16(ek.KeyType) << 3
	info |= uint16(ek.KeyIndex) << 4
	if ek.Install {
		info |= 0x0040
	}
	if ek.KeyACK {
		info |= 0x0080
	}
	if ek.KeyMIC {
		info |= 0x0100
	}
	if ek.Secure {
		info |= 0x0200
	}
	if ek.MICError {
		info |= 0x0400
	}
	if ek.Request {
		info |= 0x0800
	}
	if ek.HasEncryptedKeyData {
		info |= 0x1000
	}
	if ek.SMKMessage {
		info |= 0x2000
	}
	binary.BigEndian.PutUint16(buf[1:3], info)

	binary.BigEndian.PutUint16(buf[3:5], ek.KeyLength)
	binary.BigEndian.PutUint64(buf[5:13], ek.ReplayCounter)

	copy(buf[13:45], ek.Nonce)
	copy(buf[45:61], ek.IV)
	binary.BigEndian.PutUint64(buf[61:69], ek.RSC)
	binary.BigEndian.PutUint64(buf[69:77], ek.ID)
	copy(buf[77:93], ek.MIC)

	binary.BigEndian.PutUint16(buf[93:95], ek.KeyDataLength)
	if len(ek.EncryptedKeyData) > 0 {
		copy(buf[95:95+len(ek.EncryptedKeyData)], ek.EncryptedKeyData)
	}

	return nil
}

func decodeEAPOLKey(data []byte, p gopacket.PacketBuilder) error {
	ek := &EAPOLKey{}