org.eclipse.californium.scandium.dtls

Class SupportedEllipticCurvesExtension

java.lang.Object

org.eclipse.californium.scandium.dtls.HelloExtension

org.eclipse.californium.scandium.dtls.SupportedEllipticCurvesExtension

public final class SupportedEllipticCurvesExtension
extends HelloExtension

The supported elliptic curves extension. According RFC 8422, 5.1.1. Supported Elliptic Curves Extension only "named curves" are valid, the "prime" and "char2" curve descriptions are deprecated.

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.californium.scandium.dtls.HelloExtension

HelloExtension.ExtensionType

Field Summary

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

LENGTH_BITS, TYPE_BITS

Constructor Summary

Constructors

Constructor and Description
SupportedEllipticCurvesExtension(List<XECDHECryptography.SupportedGroup> supportedGroups) Create supported elliptic curves extension.

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addExtensionData(org.eclipse.californium.elements.util.DatagramWriter writer) Adds binary encoding of this extension's data.
static HelloExtension	fromExtensionDataReader(org.eclipse.californium.elements.util.DatagramReader extensionDataReader)
int	getLength() Gets the overall length of this extension's corresponding Extension struct.
List<XECDHECryptography.SupportedGroup>	getSupportedGroups() Get list of contained supported (and usable) groups (curves).
String	toString()

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

fromExtensionDataReader, toByteArray

Methods inherited from class java.lang.Object

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

Constructor Detail

SupportedEllipticCurvesExtension

public SupportedEllipticCurvesExtension(List<XECDHECryptography.SupportedGroup> supportedGroups)

Create supported elliptic curves extension.

Parameters:

supportedGroups - the list of supported groups (named curves).

Since:

2.3

Method Detail

addExtensionData

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

Description copied from class: HelloExtension

Adds binary encoding of this extension's data.

This implementation does not do anything. Sub-classes should override this method and use the passed-in writer to add their extension_data bytes to the Extension data structure.

NB: Subclasses MUST NOT write the extension's type code to the writer as this will already have been done by the HelloExtension.toByteArray() method.

Specified by:

addExtensionData in class HelloExtension

Parameters:

writer - the writer to use for serialization

fromExtensionDataReader

public static HelloExtension fromExtensionDataReader(org.eclipse.californium.elements.util.DatagramReader extensionDataReader)

getLength

public int getLength()

Description copied from class: HelloExtension

Gets the overall length of this extension's corresponding Extension struct.

Note that this includes the 2 bytes indicating the extension type.

Specified by:

getLength in class HelloExtension

Returns:

the length in bytes

toString

public String toString()

Overrides:

toString in class HelloExtension

getSupportedGroups

public List<XECDHECryptography.SupportedGroup> getSupportedGroups()

Get list of contained supported (and usable) groups (curves).

Returns:

list of supported groups.