de.schlichtherle.key
Class PromptingAesKeyProvider

java.lang.Object
  de.schlichtherle.key.AbstractKeyProvider
      de.schlichtherle.key.PromptingKeyProvider
          de.schlichtherle.key.PromptingAesKeyProvider

All Implemented Interfaces:

AesKeyProvider, KeyProvider

public class PromptingAesKeyProvider
extends PromptingKeyProvider
implements AesKeyProvider

An implementation of AesKeyProvider which prompts the user for a key and allows to select the cipher key strength when creating a new AES encrypted resource or replacing the entire contents of an already existing AES encrypted resource.

This class is thread safe.

Since:

TrueZIP 6.0

Version:

$Id: PromptingAesKeyProvider.java,v 1.3 2010/08/16 10:55:46 christian_schlichtherle Exp $

Author:

Christian Schlichtherle

Field Summary

Fields inherited from interface de.schlichtherle.key.AesKeyProvider

KEY_STRENGTH_128, KEY_STRENGTH_192, KEY_STRENGTH_256

Fields inherited from interface de.schlichtherle.key.KeyProvider

MIN_KEY_RETRY_DELAY

Constructor Summary

PromptingAesKeyProvider()

Method Summary

int	getKeyStrength() Returns the cipher key strength for the AES encryption.
protected String	getUIClassID() Returns the identifier which is used by the PromptingKeyManager to look up an instance of the PromptingKeyProviderUI user interface class which is then used to prompt the user for a key.
protected void	onReset() Resets the key strength to 256 bits.
void	setKeyStrength(int keyStrength) Sets the cipher key strength for the AES encryption.
String	toString() Returns the current key strength.

Methods inherited from class de.schlichtherle.key.PromptingKeyProvider

addToKeyManager, getCreateKeyImpl, getOpenKeyImpl, getResourceID, invalidOpenKeyImpl, removeFromKeyManager, reset

Methods inherited from class de.schlichtherle.key.AbstractKeyProvider

cloneKey, getCreateKey, getKey, getOpenKey, invalidOpenKey, resetKey, setKey

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.schlichtherle.key.KeyProvider

getCreateKey, getOpenKey, invalidOpenKey

Constructor Detail

PromptingAesKeyProvider

public PromptingAesKeyProvider()

Method Detail

getKeyStrength

public int getKeyStrength()

Description copied from interface: AesKeyProvider

Returns the cipher key strength for the AES encryption.

Specified by:

getKeyStrength in interface AesKeyProvider

Returns:

One of KEY_STRENGTH_128, KEY_STRENGTH_192 or KEY_STRENGTH_256.

setKeyStrength

public void setKeyStrength(int keyStrength)

Description copied from interface: AesKeyProvider

Sets the cipher key strength for the AES encryption.

Specified by:

setKeyStrength in interface AesKeyProvider

Parameters:

keyStrength - One of KEY_STRENGTH_128, KEY_STRENGTH_192 or KEY_STRENGTH_256.

getUIClassID

protected String getUIClassID()

Description copied from class: PromptingKeyProvider

Returns the identifier which is used by the PromptingKeyManager to look up an instance of the PromptingKeyProviderUI user interface class which is then used to prompt the user for a key. The implementation in this class returns the fully qualified name of this class.

Subclasses which want to use a custom user interface should overwrite this method to return the fully qualified name of their respective class as the identifier and provide a custom PromptingKeyManager which has registered a PromptingKeyProviderUI class for this identifier.

Overrides:

getUIClassID in class PromptingKeyProvider

onReset

protected void onReset()

Resets the key strength to 256 bits.

Overrides:

onReset in class PromptingKeyProvider

toString

public String toString()

Returns the current key strength.

Overrides:

toString in class Object