Package org.jitsi.impl.neomedia.transform.srtp

Class SRTCPTransformer

java.lang.Object

org.jitsi.impl.neomedia.transform.SinglePacketTransformer

org.jitsi.impl.neomedia.transform.srtp.SRTCPTransformer

All Implemented Interfaces:

PacketTransformer

public class SRTCPTransformer
extends SinglePacketTransformer

SRTCPTransformer implements PacketTransformer. It encapsulate the encryption / decryption logic for SRTCP packets

Author:

Bing SU (nova.su@gmail.com), Werner Dittmann <Werner.Dittmann@t-online.de>

Constructor Summary

Constructors

Constructor	Description
SRTCPTransformer(SRTPTransformer srtpTransformer)	Constructs an SRTCPTransformer, sharing its SrtpContextFactory instances with a given SRTPTransformer.
SRTCPTransformer(org.jitsi.srtp.SrtpContextFactory factory)	Constructs a SRTCPTransformer object.
SRTCPTransformer(org.jitsi.srtp.SrtpContextFactory forwardFactory, org.jitsi.srtp.SrtpContextFactory reverseFactory)	Constructs a SRTCPTransformer object.

Method Summary

Modifier and Type	Method	Description
void	close()	Closes this SRTCPTransformer and the underlying transform engine.
RawPacket	reverseTransform(RawPacket pkt)	Decrypts a SRTCP packet
RawPacket	transform(RawPacket pkt)	Encrypts a SRTCP packet
void	updateFactory(org.jitsi.srtp.SrtpContextFactory factory, boolean forward)	Sets a new key factory when key material has changed.

Methods inherited from class org.jitsi.impl.neomedia.transform.SinglePacketTransformer

reverseTransform, transform

Methods inherited from class java.lang.Object

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

Constructor Detail

SRTCPTransformer

public SRTCPTransformer(SRTPTransformer srtpTransformer)

Constructs an SRTCPTransformer, sharing its SrtpContextFactory instances with a given SRTPTransformer.

Parameters:

srtpTransformer - the SRTPTransformer with which this SRTCPTransformer will share its SrtpContextFactory instances.

SRTCPTransformer

public SRTCPTransformer(org.jitsi.srtp.SrtpContextFactory factory)

Constructs a SRTCPTransformer object.

Parameters:

factory - The associated context factory for both transform directions.

SRTCPTransformer

public SRTCPTransformer(org.jitsi.srtp.SrtpContextFactory forwardFactory,
                        org.jitsi.srtp.SrtpContextFactory reverseFactory)

Constructs a SRTCPTransformer object.

Parameters:

forwardFactory - The associated context factory for forward transformations.

reverseFactory - The associated context factory for reverse transformations.

Method Detail

updateFactory

public void updateFactory(org.jitsi.srtp.SrtpContextFactory factory,
                          boolean forward)

Sets a new key factory when key material has changed.

Parameters:

factory - The associated context factory for transformations.

forward - true if the supplied factory is for forward transformations, false for the reverse transformation factory.

close

public void close()

Closes this SRTCPTransformer and the underlying transform engine. It closes all stored crypto contexts. It deletes key data and forces a cleanup of the crypto contexts.

Specified by:

close in interface PacketTransformer

Overrides:

close in class SinglePacketTransformer

reverseTransform

public RawPacket reverseTransform(RawPacket pkt)

Decrypts a SRTCP packet

Specified by:

reverseTransform in class SinglePacketTransformer

Parameters:

pkt - encrypted SRTCP packet to be decrypted

Returns:

decrypted SRTCP packet

transform

public RawPacket transform(RawPacket pkt)

Encrypts a SRTCP packet

Specified by:

transform in class SinglePacketTransformer

Parameters:

pkt - plain SRTCP packet to be encrypted

Returns:

encrypted SRTCP packet