org.logi.crypto.io
Class CipherStreamClient

java.lang.Object
  |
  +--org.logi.crypto.Crypto
        |
        +--org.logi.crypto.io.CipherStream
              |
              +--org.logi.crypto.io.CipherStreamClient

public class CipherStreamClient
extends CipherStream

This class can be used to apply an interactive key exchange protocol to a pair of streams and then encrypt all data going through them with the session key exchanged.

It can also execute interactive protocols on the streams once they are initialized.

This class expects to talk to an equivalent server class.

Author:
Logi Ragnarsson (logir@logi.org)
See Also:
CipherStreamServer

Fields inherited from class org.logi.crypto.Crypto
BIT, cdsPath, EMPTY_ARRAY, FOUR, keySource, NIBBLE, ONE, primeCertainty, random, TWO, ZERO
 
Constructor Summary
CipherStreamClient(java.io.InputStream in, java.io.OutputStream out, InterKeyExClient kex, EncryptMode encrypt, DecryptMode decrypt)
          Create a new CipherStreamClient object and ecxhange keys.
 
Method Summary
 void execute(InterProtocolClient prot)
          Executes an interactive protocol.
 
Methods inherited from class org.logi.crypto.io.CipherStream
getDecryptKey, getEncryptKey, getInputStream, getOutputStream
 
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
 

Constructor Detail

CipherStreamClient

public CipherStreamClient(java.io.InputStream in,
                          java.io.OutputStream out,
                          InterKeyExClient kex,
                          EncryptMode encrypt,
                          DecryptMode decrypt)
                   throws CryptoProtocolException,
                          java.io.IOException
Create a new CipherStreamClient object and ecxhange keys.

Create a new object which uses kex to exchange keys with a remote server and then encrypt to encrypt the data to out and decrypt to decrypt data from in and out.

if kex==null then the key-exchange step is skipped and the encrypt and decrypt objects must have been initialized with a key beforethis call.

Throws:
CryptoProtocolException - if there is a problem exchanging keys.
java.io.IOException - if there is a problem with the underlying streams.
Method Detail

execute

public void execute(InterProtocolClient prot)
             throws java.io.IOException,
                    CryptoProtocolException
Executes an interactive protocol. If the encrypt/decrypt mode objects have been initialized with a session key, such as by executing a key-exchange protocol in the constructor, then the protocol will be executed through the encrypted link.
Throws:
CryptoProtocolException - if there is a problem with the protocol keys.
java.io.IOException - if there is a problem with the underlying streams.


Copyright 1997-2000 Logi Ragnarsson