Package com.mku.win.salmon.sequencer

Class WinFileSequencer

java.lang.Object

com.mku.salmonfs.sequence.FileSequencer

com.mku.win.salmon.sequencer.WinFileSequencer

All Implemented Interfaces:

INonceSequencer

public class WinFileSequencer
extends FileSequencer

File Sequencer for Windows with tamper protection.

Constructor Summary

Constructors

Constructor	Description
WinFileSequencer(IFile sequenceFile, INonceSequenceSerializer serializer, java.lang.String regCheckSumKey)	Instantiate a windows file sequencer.

Method Summary

Modifier and Type	Method	Description
java.lang.String	getCheckSumKey()	Get the registry key to save the checksum.
protected java.lang.String	getContents()	Gets the checksum the registry and verifies the contents.
void	reset(boolean clearChecksumOnly)	Reset the sequences.
protected void	saveContents(java.lang.String contents)	Save contents to the file and checksum to registry.
void	setCheckSumKey(java.lang.String key)	Set the registry key to save the checksum.

Methods inherited from class com.mku.salmonfs.sequence.FileSequencer

close, createSequence, getSequence, getSequenceFile, initializeSequence, nextNonce, revokeSequence, saveSequenceFile, setMaxNonce

Methods inherited from class java.lang.Object

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

Constructor Detail

WinFileSequencer

public WinFileSequencer(IFile sequenceFile,
                        INonceSequenceSerializer serializer,
                        java.lang.String regCheckSumKey)
                 throws java.io.IOException

Instantiate a windows file sequencer.

Parameters:

sequenceFile - The sequence file

serializer - The serializer

regCheckSumKey - The registry key to use for the checksum.

Throws:

SequenceException - Thrown if there is an error with the nonce sequence

java.io.IOException - Thrown if there is an IO error.

Method Detail

getCheckSumKey

public java.lang.String getCheckSumKey()

Get the registry key to save the checksum.

Returns:

The key

setCheckSumKey

public void setCheckSumKey(java.lang.String key)

Set the registry key to save the checksum.

Parameters:

key - The key

getContents

protected java.lang.String getContents()

Gets the checksum the registry and verifies the contents.

Overrides:

getContents in class FileSequencer

Returns:

The contents

Throws:

SequenceException - Thrown if there is an error with the nonce sequence

saveContents

protected void saveContents(java.lang.String contents)

Save contents to the file and checksum to registry. The checksum is using SHA256 but to further protected from rainbow attacks we also encrypt it with the User windows credentials using ProtectedData. from rainbow attacks

Overrides:

saveContents in class FileSequencer

Parameters:

contents - The contents

Throws:

SequenceException - Thrown if there is an error with the nonce sequence

reset

public void reset(boolean clearChecksumOnly)

Reset the sequences. The device will be de-authorized for all drives.

Parameters:

clearChecksumOnly - True to only clear the registry checksum, use only if you know what you're doing. Default value is false)