sos.koa
Class DecryptAdapter

java.lang.Object
  sos.koa.Task
      sos.koa.DecryptAdapter

All Implemented Interfaces:

java.awt.event.ActionListener, java.util.EventListener, KOAConstants

public class DecryptAdapter

extends Task

Class to decrypt the votes.

Version:

$Id: DecryptAdapter.java,v 1.45 2004/05/25 12:15:41 hubbers Exp $

Author:

Martijn Oostdijk (martijno@cs.kun.nl)

Nested Class Summary

Nested classes inherited from class sos.koa.Task

Task.ActionThread, Task.MonitoredThread

Field Summary

(package private) static java.lang.String	DESEDE_DECRYPT_ALGORITHM The algorithm used by the desedeCipher.
(package private) javax.crypto.Cipher	desedeCipher The session key cipher for decrypting the vote information.
(package private) java.util.ArrayList	errors A list containing errors encountered this far.
(package private) boolean	keepRunning Indicates whether to keep decrypting.
(package private) int	rowCount The number of votes decrypted this far.
(package private) static java.lang.String	RSA_ALGORITHM The algorithm used by the rsaCipher.
(package private) javax.crypto.Cipher	rsaCipher The RSA cipher for decrypting the session key.
private static byte[]	SALT The salt value used to generate the session keys.

Fields inherited from class sos.koa.Task

maxSubTasks, monitor, stillWorking, subTaskCount, success

Fields inherited from interface sos.koa.KOAConstants

ADDITIONAL_INFO_EXTRA, ADDITIONAL_INFO_MAX_HEIGHT, ADDITIONAL_INFO_MAX_WIDTH, AUDITLOG, AUDITLOG_PDF, AUDITLOG_XML, AUDITLOG_XSL, BASEDIR, CANDIDATES_IMPORTED_STATE, CLEAR_BUT_TXT, CLEAR_FAILURE_MSG, CLEAR_SUCCESS_MSG, CLEAR_TASK_MSG, CLEAR_WARNING_MSG, CLEAR_WARNING_MSG_1, CLEAR_WARNING_MSG_2, CLEARED_STATE, COUNT_BUT_TXT, COUNT_FAILURE_MSG, COUNT_SUCCESS_MSG, COUNT_TASK_MSG, COUNT_WARNING_MSG, DECRYPT_BUT_TXT, DECRYPT_ERROR_MSG, DECRYPT_ERROR_TAG, DECRYPT_FAILURE_MSG, DECRYPT_SUCCESS_MSG, DECRYPT_TASK_MSG, DECRYPT_WARNING_MSG, DECRYPTEDFILE, DEFAULT_VOTING_INTERVAL, EXIT_BUT_TXT, EXIT_FAILURE_MSG, EXIT_SUCCESS_MSG, EXIT_TASK_MSG, EXIT_WARNING_MSG, FORWARD_BACK_OPTIONS, FORWARD_MOREINFO_BACK_OPTIONS, HELP_BUT_TXT, HELP_TASK_MSG, IMPORT_CANDIDATES_BUT_TXT, IMPORT_CANDIDATES_FAILURE_MSG, IMPORT_CANDIDATES_SUCCESS_MSG, IMPORT_CANDIDATES_TASK_MSG, IMPORT_CANDIDATES_WARNING_MSG, IMPORT_KEY_FAILURE_MSG, IMPORT_KEY_SUCCESS_MSG, IMPORT_KEY_WARNING_MSG, IMPORT_PRIVATE_KEY_BUT_TXT, IMPORT_PRIVATE_KEY_TASK_MSG, IMPORT_PUBLIC_KEY_BUT_TXT, IMPORT_PUBLIC_KEY_TASK_MSG, IMPORT_VOTES_BUT_TXT, IMPORT_VOTES_FAILURE_MSG, IMPORT_VOTES_SUCCESS_MSG, IMPORT_VOTES_TASK_MSG, IMPORT_VOTES_WARNING_MSG, INIT_STATE, LESSINFO_OPTION, MAX_ENCRYPTED_VOTE_LENGTH, MAX_KEY_LENGTH, MOREINFO_OPTION, NO_ERRORS_MSG, NUMBER_OF_REDUNDANT_FIELDS, OK_CANCEL_OPTIONS, OK_LESSINFO_CANCEL_OPTIONS, OK_LESSINFO_OPTIONS, OK_MOREINFO_CANCEL_OPTIONS, OK_MOREINFO_OPTIONS, OK_OPTIONS, OUTDIR, PRIVATE_KEY_IMPORTED_STATE, PRIVATE_KEYTYPE, PUBLIC_KEY_IMPORTED_STATE, PUBLIC_KEYTYPE, RECOUNT, RECOUNT_PDF, RECOUNT_XML, RECOUNT_XSL, RELEASE, REPORT_BUT_TXT, REPORT_FAILURE_MSG, REPORT_GENERATED_STATE, REPORT_OPTIONS, REPORT_SUCCESS_MSG, REPORT_TASK_MSG, REPORT_WARNING_MSG, RESTART_BUT_TXT, RESTART_FAILURE_MSG, RESTART_SUCCESS_MSG, RESTART_TASK_MSG, RESTART_WARNING_MSG, TASK_CANCELED_MSG, TITLE, VOTES_COUNTED_STATE, VOTES_DECRYPTED_STATE, VOTES_IGNORED_SEE_MORE_INFO_MSG, VOTES_IMPORTED_STATE, YES_CANCEL_OPTIONS, YES_NO_OPTIONS

Constructor Summary

DecryptAdapter()
Constructs this adapter.

Method Summary

private java.lang.String	decrypt(byte[] encryptedVote) Decrypts one vote.
(package private) void	doAction() Decrypts the votes in rawVotes.
(package private) java.lang.Object	getAdditionalInfo() Gets even more information about this (completed) task.
(package private) java.lang.String[]	getErrors() Gets the errors encountered during execution of this task.
(package private) java.lang.String	getFailureMessage() What to print in failure dialog.
(package private) java.lang.String	getInfo() Gets information that should be displayed if this task completes successfully.
(package private) java.lang.String	getSuccessMessage() What to print in success dialog.
(package private) int	getSuccessState() The application state after successful termination of this task.
(package private) java.lang.String	getTitle() The title of this task.
(package private) boolean	isAdditionalInfoAvailable() Indicates whether even more information is available about this (completed) task.
(package private) boolean	isPreStateAllowed(int state)
boolean	isProgressMonitoredTask() Indicates whether a progress monitor should be popped up.
(package private) void	logCompleted() Writes a 'task completed' entry in the log.
(package private) void	logFailed(java.lang.String reason) Writes a 'task failed' entry in the log.
(package private) void	logStarted() Writes a 'task started' entry in the log.
(package private) void	stopAction() Interrupts the execution of doAction.

Methods inherited from class sos.koa.Task

actionPerformed, clear, getWarningMessage, isCancelableTask, isDangerousTask, isModalTask, logCanceled, logOpenedFile, popupAdditionalInfo, popupAdditionalInfo, popupFailure, popupGetFile, popupGetPassword, popupNext, popupNextOrBack, popupSuccess, popupWarning, setMaxSubTasks, setSubTaskCount

Methods inherited from class java.lang.Object

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

Field Detail

SALT

private static final byte[] SALT

The salt value used to generate the session keys.

RSA_ALGORITHM

static final java.lang.String RSA_ALGORITHM

The algorithm used by the rsaCipher.

See Also:

Constant Field Values

DESEDE_DECRYPT_ALGORITHM

static final java.lang.String DESEDE_DECRYPT_ALGORITHM

The algorithm used by the desedeCipher.

See Also:

Constant Field Values

rsaCipher

javax.crypto.Cipher rsaCipher

The RSA cipher for decrypting the session key.

desedeCipher

javax.crypto.Cipher desedeCipher

The session key cipher for decrypting the vote information.

keepRunning

boolean keepRunning

Indicates whether to keep decrypting.

rowCount

int rowCount

The number of votes decrypted this far.

errors

java.util.ArrayList errors

A list containing errors encountered this far.

Constructor Detail

DecryptAdapter

public DecryptAdapter()

Constructs this adapter.

Method Detail

getTitle

java.lang.String getTitle()

Description copied from class: Task

The title of this task. Is used in title-bar of dialogs.

Specified by:

getTitle in class Task

Returns:

Title of this task.

getSuccessMessage

java.lang.String getSuccessMessage()

Description copied from class: Task

What to print in success dialog.

Specified by:

getSuccessMessage in class Task

Returns:

text to print in success dialog.

getFailureMessage

java.lang.String getFailureMessage()

Description copied from class: Task

What to print in failure dialog.

Specified by:

getFailureMessage in class Task

Returns:

text to print in failure dialog.

getInfo

java.lang.String getInfo()

Description copied from class: Task

Gets information that should be displayed if this task completes successfully.

Overrides:

getInfo in class Task

Returns:

information that should be displayed if this task completes successfully.

isPreStateAllowed

boolean isPreStateAllowed(int state)

Specified by:

isPreStateAllowed in class Task

getSuccessState

int getSuccessState()

Description copied from class: Task

The application state after successful termination of this task.

Specified by:

getSuccessState in class Task

Returns:

the new state.

isProgressMonitoredTask

public boolean isProgressMonitoredTask()

Description copied from class: Task

Indicates whether a progress monitor should be popped up. Default is false.

Overrides:

isProgressMonitoredTask in class Task

Returns:

By default false.

logStarted

void logStarted()

Description copied from class: Task

Writes a 'task started' entry in the log.

Overrides:

logStarted in class Task

logFailed

void logFailed(java.lang.String reason)

Description copied from class: Task

Writes a 'task failed' entry in the log.

Overrides:

logFailed in class Task

logCompleted

void logCompleted()

Description copied from class: Task

Writes a 'task completed' entry in the log.

Overrides:

logCompleted in class Task

doAction

void doAction()
        throws KOAException

Decrypts the votes in rawVotes.

Specified by:

doAction in class Task

Throws:

KOAException - if decryption failed.

stopAction

void stopAction()

Interrupts the execution of doAction.

Overrides:

stopAction in class Task

decrypt

private java.lang.String decrypt(byte[] encryptedVote)
                          throws KOAException

Decrypts one vote.

Parameters:

encryptedVote - the vote to decrypt.

Returns:

the decrypted vote.

Throws:

KOAException - if decryption failed.

getAdditionalInfo

java.lang.Object getAdditionalInfo()

Description copied from class: Task

Gets even more information about this (completed) task. The resulting Object can be used in a dialog message.

Overrides:

getAdditionalInfo in class Task

Returns:

Even more information about this (completed) task.

isAdditionalInfoAvailable

boolean isAdditionalInfoAvailable()

Description copied from class: Task

Indicates whether even more information is available about this (completed) task.

Overrides:

isAdditionalInfoAvailable in class Task

Returns:

A boolean indicating whether even more information is available about this (completed) task.

getErrors

java.lang.String[] getErrors()

Gets the errors encountered during execution of this task.

Returns:

an array of error strings.