org.logi.crypto.protocols
Class EncryptedKeyExClient

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

All Implemented Interfaces:

InterKeyExClient, InterProtocolClient, NoninterKeyExClient, NoninterProtocolClient

public class EncryptedKeyExClient

extends Crypto

implements NoninterKeyExClient

Exchange keys by sending an encrypted key from this class to the corresponding EncryptedKeyExServer.

Author:

Logi Ragnarsson (logir@logi.org)

See Also:

EncryptedKeyExServer

Fields inherited from class org.logi.crypto.Crypto

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

Constructor Summary

EncryptedKeyExClient(EncryptionKey key, Key sessionKey)
Create a new EncryptedKeyExClient object.

EncryptedKeyExClient(EncryptionKey key, SigningKey signKey, Key sessionKey)
Create a new EncryptedKeyExClient object.

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

Constructor Detail

EncryptedKeyExClient

public EncryptedKeyExClient(EncryptionKey key,
                            Key sessionKey)

Create a new EncryptedKeyExClient object. It uses key to encrypt sessionKey and then sends it to the server.

EncryptedKeyExClient

public EncryptedKeyExClient(EncryptionKey key,
                            SigningKey signKey,
                            Key sessionKey)

Create a new EncryptedKeyExClient object. It uses key to encrypt sessionKey and then sends it to the server.

If signKey is not null, then the session key will be signed with this key.

Method Detail

sessionKey

public Key sessionKey()

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

Specified by:

sessionKey in interface InterKeyExClient

completed

public boolean completed()

Returns true iff this end of the protocol i completed.

Specified by:

completed in interface InterProtocolClient

maxMessageSize

public int maxMessageSize()

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

Specified by:

maxMessageSize in interface InterProtocolClient

message

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

Get the next message in the protocol.

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

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

Specified by:

message in interface InterProtocolClient

Throws:

CryptoProtocolException - if a problem arises with the protocol.