Package de.das.encrypter.cryptoservice

Class CryptoServer

java.lang.Object

de.das.encrypter.cryptoservice.CryptoServer

All Implemented Interfaces:

DataReceiver, ResultReceiver, ActionListener, EventListener

public class CryptoServer
extends Object
implements DataReceiver, ActionListener, ResultReceiver

Keys can be requested via this server. It receives requests consisting of an encrypted string containing a key ID and the desired length of the key separated by a semicolon. If a key with this ID is available and it is possible to provide the required length, the server starts sending a key block by block.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	KEY_UNKNOWN
static final int	KEYS_TOO_SHORT
static final int	NO_REJECTION
static final int	NO_UNUSED_KEY_AVAILABLE
static final String	RESPONSE_ID
static final int	RESPONSE_ID_LENGTH

Fields inherited from interface de.das.encrypter.processors.ResultReceiver

PARTNER_RESPONSE, RESULT_STRINGS, TRANSFER_BREAK, TRANSFER_FAILED, TRANSFER_VALID

Constructor Summary

Constructors

Constructor	Description
CryptoServer(KeyFiles kfs, int port, EntryPointSupplier eps)

Method Summary

Modifier and Type	Method	Description
void	actionPerformed(ActionEvent e)	Receiver of an action event in case of a time out situation.
static void	createInstance(KeyFiles kfs, int port, EntryPointSupplier eps)
static Long	getCryptoKeyId()	Returns the current ID of the key used for encryption of requests and keys.
static void	newPort(int port)	Changes the port where the crypto service is offered.
static void	setCryptoKeyId(Long id)	Sets the ID of the key bundle to be used to encrypt the key part to be returned based on the request.
void	setData(byte[] data)	Unused interface methode.
void	setData(String host, byte[] data)	Receives data and checks if the data length is smaller than 80 bytes, the data is encrypted, if the required key for decryption is available and if a "crypto key ID" has been set for the encryption of the key to be sent.
void	setResult(int result, String info)	The result information coming from the transfer control instance.

Methods inherited from class java.lang.Object

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

Field Details

RESPONSE_ID

public static final String RESPONSE_ID

See Also:

• Constant Field Values

RESPONSE_ID_LENGTH

public static final int RESPONSE_ID_LENGTH

NO_REJECTION

public static final int NO_REJECTION

See Also:

• Constant Field Values

KEY_UNKNOWN

public static final int KEY_UNKNOWN

See Also:

• Constant Field Values

KEYS_TOO_SHORT

public static final int KEYS_TOO_SHORT

See Also:

• Constant Field Values

NO_UNUSED_KEY_AVAILABLE

public static final int NO_UNUSED_KEY_AVAILABLE

See Also:

• Constant Field Values

Constructor Details

CryptoServer

public CryptoServer(KeyFiles kfs,
 int port,
 EntryPointSupplier eps)
             throws Exception

Throws:

Exception

Method Details

createInstance

public static void createInstance(KeyFiles kfs,
 int port,
 EntryPointSupplier eps)
                           throws Exception

Throws:

Exception

setCryptoKeyId

public static void setCryptoKeyId(Long id)

Sets the ID of the key bundle to be used to encrypt the key part to be returned based on the request.

Parameters:

id - the ID of a key bundle.

getCryptoKeyId

public static Long getCryptoKeyId()

Returns the current ID of the key used for encryption of requests and keys.

Returns:

newPort

public static void newPort(int port)

Changes the port where the crypto service is offered.

Parameters:

port - the new port number.

setData

public void setData(byte[] data)

Unused interface methode.

Specified by:

setData in interface DataReceiver

Parameters:

data -

setData

public void setData(String host,
 byte[] data)

Receives data and checks if the data length is smaller than 80 bytes, the data is encrypted, if the required key for decryption is available and if a "crypto key ID" has been set for the encryption of the key to be sent. If these conditions are met, the received data will be passed for decryption and if executable to start the broadcast. If one of these conditions is not met, the request is ignored.

Specified by:

setData in interface DataReceiver

Parameters:

host - the IP-address of the receiver.

data - received data via UDP service receiver.

actionPerformed

public void actionPerformed(ActionEvent e)

Receiver of an action event in case of a time out situation.

Specified by:

actionPerformed in interface ActionListener

Parameters:

e - an action event.

setResult

public void setResult(int result,
 String info)

The result information coming from the transfer control instance.

Specified by:

setResult in interface ResultReceiver

Parameters:

result - an integer with information whether a transfer was successful or failed.

info - an optional and additional information text.