org.logi.crypto.protocols
Class SendHashKeyExServer

java.lang.Object
  |
  +--org.logi.crypto.Crypto
        |
        +--org.logi.crypto.protocols.SendHashKeyEx
              |
              +--org.logi.crypto.protocols.SendHashKeyExServer

All Implemented Interfaces:

InterKeyExServer, InterProtocolServer, NoninterKeyExServer, NoninterProtocolServer

public class SendHashKeyExServer

extends org.logi.crypto.protocols.SendHashKeyEx

implements NoninterKeyExServer

This class implements the server portion of the key-exchange protocol whereby the client sends the server the hash of the key that should be used for decryption. The server is assumed to have this key in its default KeySource.

Author:

Logi Ragnarsson (logir@logi.org)

See Also:

SendHashKeyExClient

Fields inherited from class org.logi.crypto.Crypto

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

Constructor Summary

SendHashKeyExServer()
Create a new SendHashKeyExServer.

Method Summary

boolean	completed() Returns true iff this end of the protocol i completed.
int	maxMessageSize() Returns the maximum expected size of a message for this protocol.
byte[]	message(byte[] received) Get the next message in the protocol.
Key	sessionKey() Returns the key if it has been decided upon, or null otherwise.

Methods inherited from class org.logi.crypto.Crypto

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

Methods inherited from class java.lang.Object

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

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

completed, maxMessageSize

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

sessionKey

Constructor Detail

SendHashKeyExServer

public SendHashKeyExServer()

Create a new SendHashKeyExServer.

Method Detail

message

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

Get the next message in the protocol.

received is the last message received form the client and has not yet been sent to the client.

The returned value is the next message to send to the client or null if no more messages need to be sent and the protocol is terminated.

Specified by:

message in interface InterProtocolServer

Throws:

CryptoProtocolException - if a problem arises with the protocol.

sessionKey

public Key sessionKey()

Returns the key if it has been decided upon, or null otherwise.

completed

public boolean completed()

Returns true iff this end of the protocol i completed.

maxMessageSize

public int maxMessageSize()

Returns the maximum expected size of a message for this protocol.