org.mapdb

Class EncryptionXTEA

java.lang.Object

org.mapdb.EncryptionXTEA

public final class EncryptionXTEA
extends java.lang.Object

An implementation of the EncryptionXTEA block cipher algorithm.

This implementation uses 32 rounds. The best attack reported as of 2009 is 36 rounds (Wikipedia).

It requires 32 byte long encryption key, so SHA256 password hash is used.

Field Summary

Fields

Modifier and Type	Field and Description
static int	ALIGN Blocks sizes are always multiples of this number.

Constructor Summary

Constructors

Constructor and Description
EncryptionXTEA(byte[] password)

Method Summary

Modifier and Type	Method and Description
void	decrypt(byte[] bytes, int off, int len)
void	encrypt(byte[] bytes, int off, int len)
static byte[]	getHash(byte[] data) Calculate the SHA256 hash code for the given data.

Methods inherited from class java.lang.Object

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

Field Detail

ALIGN

public static final int ALIGN

Blocks sizes are always multiples of this number.

See Also:

Constant Field Values

Constructor Detail

EncryptionXTEA

public EncryptionXTEA(byte[] password)

Method Detail

encrypt

public void encrypt(byte[] bytes,
                    int off,
                    int len)

decrypt

public void decrypt(byte[] bytes,
                    int off,
                    int len)

getHash

public static byte[] getHash(byte[] data)

Calculate the SHA256 hash code for the given data. Used to hash password.

Parameters:

data - the data to hash

Returns:

the hash code