org.eclipse.californium.scandium.dtls

Class ECDHClientKeyExchange

java.lang.Object

org.eclipse.californium.scandium.dtls.AbstractMessage

org.eclipse.californium.scandium.dtls.HandshakeMessage

org.eclipse.californium.scandium.dtls.ClientKeyExchange

org.eclipse.californium.scandium.dtls.ECDHClientKeyExchange

All Implemented Interfaces:

DTLSMessage

Direct Known Subclasses:

EcdhPskClientKeyExchange

public class ECDHClientKeyExchange
extends ClientKeyExchange

ClientKeyExchange message for all ECDH based key exchange methods. Contains the client's ephemeral public key as encoded point. See RFC 4492 for further details. It is assumed, that the client's ECDH public key is not in the client's certificate, so it must be provided here. According RFC 8422, 5.1.1. Supported Elliptic Curves Extension only "named curves" are valid, the "prime" and "char2" curve descriptions are deprecated. Also only "UNCOMPRESSED" as point format is valid, the other formats have been deprecated.

Field Summary

Fields inherited from class org.eclipse.californium.scandium.dtls.HandshakeMessage

FRAGMENT_LENGTH_BITS, FRAGMENT_OFFSET_BITS, MESSAGE_HEADER_LENGTH_BYTES, MESSAGE_LENGTH_BITS, MESSAGE_SEQ_BITS, MESSAGE_TYPE_BITS

Constructor Summary

Constructors

Constructor and Description
ECDHClientKeyExchange(byte[] encodedPoint, InetSocketAddress peerAddress) Create a ClientKeyExchange message.

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	fragmentToByteArray() The serialization of the handshake body (without the handshake header).
static HandshakeMessage	fromReader(org.eclipse.californium.elements.util.DatagramReader reader, InetSocketAddress peerAddress)
byte[]	getEncodedPoint() Get encoded point.
int	getMessageLength() Must be implemented by each subclass.
protected static byte[]	readEncodedPoint(org.eclipse.californium.elements.util.DatagramReader reader) Read encoded point from reader.
String	toString()
protected void	writeFragment(org.eclipse.californium.elements.util.DatagramWriter writer) Write fragment to writer.

Methods inherited from class org.eclipse.californium.scandium.dtls.ClientKeyExchange

getMessageType

Methods inherited from class org.eclipse.californium.scandium.dtls.HandshakeMessage

fragmentChanged, fromByteArray, fromGenericHandshakeMessage, getContentType, getFragmentLength, getFragmentOffset, getMessageSeq, getNextHandshakeMessage, getRawMessage, setMessageSeq, setNextHandshakeMessage, size, toByteArray, writeTo

Methods inherited from class org.eclipse.californium.scandium.dtls.AbstractMessage

getPeer

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ECDHClientKeyExchange

public ECDHClientKeyExchange(byte[] encodedPoint,
                     InetSocketAddress peerAddress)

Create a ClientKeyExchange message.

Parameters:

encodedPoint - the client's ephemeral public key (as encoded point).

peerAddress - the IP address and port of the peer this message has been received from or should be sent to

Method Detail

fragmentToByteArray

public byte[] fragmentToByteArray()

Description copied from class: HandshakeMessage

The serialization of the handshake body (without the handshake header). Must be implemented by each subclass. Except the ClientHello, the fragments are considered to be not modified. If a modification is required, call HandshakeMessage.fragmentChanged().

Specified by:

fragmentToByteArray in class HandshakeMessage

Returns:

the raw byte representation of the handshake body.

writeFragment

protected void writeFragment(org.eclipse.californium.elements.util.DatagramWriter writer)

Write fragment to writer. Write the encoded point.

Parameters:

writer - writer

readEncodedPoint

protected static byte[] readEncodedPoint(org.eclipse.californium.elements.util.DatagramReader reader)

Read encoded point from reader.

Parameters:

reader - reader

Returns:

encoded point

fromReader

public static HandshakeMessage fromReader(org.eclipse.californium.elements.util.DatagramReader reader,
                          InetSocketAddress peerAddress)

getMessageLength

public int getMessageLength()

Description copied from class: HandshakeMessage

Must be implemented by each subclass. The length is given in bytes and only includes the length of the subclass' specific fields (not the handshake message header).

Specified by:

getMessageLength in class HandshakeMessage

Returns:

the length of the message in bytes.

getEncodedPoint

public byte[] getEncodedPoint()

Get encoded point.

Returns:

public key as encoded point

toString

public String toString()

Overrides:

toString in class HandshakeMessage