org.logi.crypto.protocols
Class DHKeyExNoninter

java.lang.Object
  org.logi.crypto.Crypto
      org.logi.crypto.protocols.DHKeyEx
          org.logi.crypto.protocols.DHKeyExNoninter

All Implemented Interfaces:

InterKeyExClient, InterKeyExServer, InterProtocolClient, InterProtocolServer, NoninterKeyExClient, NoninterKeyExServer, NoninterProtocolClient, NoninterProtocolServer

public class DHKeyExNoninter

extends DHKeyEx

implements NoninterKeyExClient, NoninterKeyExServer

Diffie-Hellman key exchange without exchanging keys. Both parties need to know the other party's public DHKey. No messages are sent in either direction, but a unique session key is created for each pair of Diffie-Hellman keys used.

This class is both the client and server for the protocol.

See Also:

DHKeyExServer, DHKeyExClient, DHKey

Field Summary

Fields inherited from class org.logi.crypto.protocols.DHKeyEx

g, hisPublic, keyDecided, m, myPrivate, myPublic, sessionKey

Fields inherited from class org.logi.crypto.Crypto

BIT, cdsPath, EMPTY_ARRAY, FOUR, keySource, NIBBLE, ONE, primeCertainty, random, TWO, ZERO

Constructor Summary

DHKeyExNoninter(DHKey pri, DHKey pub, java.lang.String keyType)
Create a new DHKeyExClient object which uses the private DH key from pri and the public DH key from pri to generate a session key.

Method Summary

byte[]

message(byte[] received) Expects and sends null, since no messages are needed for this protocol.

Methods inherited from class org.logi.crypto.protocols.DHKeyEx

completed, maxMessageSize, sessionKey

Methods inherited from class org.logi.crypto.Crypto

binString, binString, equal, equalRelaxed, equalSub, fromHexNibble, fromHexString, fromString, fromString, hexString, hexString, hexString, hexString, hexString, initRandom, initRandom, makeClass, makeInt, makeLong, makeSessionKey, pastSpace, pickBits, pickBits, readBlock, readInt, writeBytes, writeBytes, writeInt

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.logi.crypto.protocols.InterProtocolClient

completed, maxMessageSize

Methods inherited from interface org.logi.crypto.protocols.InterKeyExClient

sessionKey

Methods inherited from interface org.logi.crypto.protocols.InterProtocolServer

completed, maxMessageSize

Methods inherited from interface org.logi.crypto.protocols.InterKeyExServer

sessionKey

Constructor Detail

DHKeyExNoninter

public DHKeyExNoninter(DHKey pri,
                       DHKey pub,
                       java.lang.String keyType)
                throws KeyException,
                       InvalidCDSException

Create a new DHKeyExClient object which uses the private DH key from pri and the public DH key from pri to generate a session key.

Throws:

KeyException - if the public/private flag of either key is wrong.

InvalidCDSException - if the session key object can not be created.

Method Detail

message

public byte[] message(byte[] received)
               throws CryptoProtocolException

Expects and sends null, since no messages are needed for this protocol.

Specified by:

message in interface InterProtocolClient

Throws:

CryptoProtocolException - if called with a parameter other than null.