Class SecureFileStore

java.lang.Object

org.h2.store.FileStore

org.h2.security.SecureFileStore

public class SecureFileStore
extends FileStore

A file store that encrypts all data before writing, and decrypts all data after reading. Areas that were never written to (for example after calling setLength to enlarge the file) are not encrypted (contains 0 bytes).

Field Summary

Fields

Modifier and Type	Field	Description
private byte[]	buffer
private final byte[]	bufferForInitVector
private final BlockCipher	cipher
private final BlockCipher	cipherForInitVector
private byte[]	key
private final int	keyIterations
private long	pos

Fields inherited from class FileStore

HEADER_LENGTH, name

Constructor Summary

Constructors

Constructor	Description
SecureFileStore(DataHandler handler, String name, String mode, String cipher, byte[] key, int keyIterations)

Method Summary

Modifier and Type	Method	Description
protected byte[]	generateSalt()	Generate the random salt bytes if required.
protected void	initKey(byte[] salt)	Initialize the key using the given salt.
void	readFully(byte[] b, int off, int len)	Read a number of bytes.
void	readFullyDirect(byte[] b, int off, int len)	Read a number of bytes without decrypting.
void	seek(long x)	Go to the specified file location.
void	write(byte[] b, int off, int len)	Write a number of bytes.
protected void	writeDirect(byte[] b, int off, int len)	Write a number of bytes without encrypting.
private void	xorInitVector(byte[] b, int off, int len, long p)

Methods inherited from class FileStore

autoDelete, close, closeAndDeleteSilently, closeFile, closeSilently, getFilePointer, init, length, open, open, open, openFile, releaseLock, setCheckedWriting, setLength, stopAutoDelete, sync, tryLock

Methods inherited from class Object

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

Field Details

key

private byte[] key

cipher

private final BlockCipher cipher

cipherForInitVector

private final BlockCipher cipherForInitVector

buffer

private byte[] buffer

pos

private long pos

bufferForInitVector

private final byte[] bufferForInitVector

keyIterations

private final int keyIterations

Constructor Details

SecureFileStore

public SecureFileStore(DataHandler handler,
 String name,
 String mode,
 String cipher,
 byte[] key,
 int keyIterations)

Method Details

generateSalt

protected byte[] generateSalt()

Description copied from class: FileStore

Generate the random salt bytes if required.

Overrides:

generateSalt in class FileStore

Returns:

the random salt or the magic

initKey

protected void initKey(byte[] salt)

Description copied from class: FileStore

Initialize the key using the given salt.

Overrides:

initKey in class FileStore

Parameters:

salt - the salt

writeDirect

protected void writeDirect(byte[] b,
 int off,
 int len)

Description copied from class: FileStore

Write a number of bytes without encrypting.

Overrides:

writeDirect in class FileStore

Parameters:

b - the source buffer

off - the offset

len - the number of bytes to write

write

public void write(byte[] b,
 int off,
 int len)

Description copied from class: FileStore

Write a number of bytes.

Overrides:

write in class FileStore

Parameters:

b - the source buffer

off - the offset

len - the number of bytes to write

readFullyDirect

public void readFullyDirect(byte[] b,
 int off,
 int len)

Description copied from class: FileStore

Read a number of bytes without decrypting.

Overrides:

readFullyDirect in class FileStore

Parameters:

b - the target buffer

off - the offset

len - the number of bytes to read

readFully

public void readFully(byte[] b,
 int off,
 int len)

Description copied from class: FileStore

Read a number of bytes.

Overrides:

readFully in class FileStore

Parameters:

b - the target buffer

off - the offset

len - the number of bytes to read

seek

public void seek(long x)

Description copied from class: FileStore

Go to the specified file location.

Overrides:

seek in class FileStore

Parameters:

x - the location

xorInitVector

private void xorInitVector(byte[] b,
 int off,
 int len,
 long p)