Class QRAuthClient

All Implemented Interfaces:
InterAuthClient, InterProtocolClient

public class QRAuthClient
extends QRAuth
implements InterAuthClient

Query-response authenticaton client. It expects to talk to a QRAuthServer object.

If the protocol is completed, the client is certain that the server also knows the secret key passed to the constructor.

Logi Ragnarsson (
See Also:

Fields inherited from class org.logi.crypto.Crypto
BIT, cdsPath, EMPTY_ARRAY, FOUR, keySource, NIBBLE, ONE, primeCertainty, random, TWO, ZERO
Constructor Summary
QRAuthClient(CipherKey key)
          Creates a new QRAuthClient object with the specified secret key.
Method Summary
 byte[] message(byte[] received)
          Get the next message in the protocol.
Methods inherited from class org.logi.crypto.protocols.QRAuth
completed, maxMessageSize
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
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.logi.crypto.protocols.InterProtocolClient
completed, maxMessageSize

Constructor Detail


public QRAuthClient(CipherKey key)
Creates a new QRAuthClient object with the specified secret key.
Method Detail


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
CryptoProtocolException - if a problem arises with the protocol.

Copyright 1997-2000 Logi Ragnarsson