org.h2.security

Interface BlockCipher

All Known Implementing Classes:

AES, Fog, XTEA

public interface BlockCipher

A block cipher is a data encryption algorithm that operates on blocks.

Field Summary

Fields

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

Method Summary

Modifier and Type	Method and Description
void	decrypt(byte[] bytes, int off, int len) Decrypt a number of bytes.
void	encrypt(byte[] bytes, int off, int len) Encrypt a number of bytes.
int	getKeyLength() Get the length of the key in bytes.
void	setKey(byte[] key) Set the encryption key used for encrypting and decrypting.

Field Detail

ALIGN

static final int ALIGN

Blocks sizes are always multiples of this number.

See Also:

Constant Field Values

Method Detail

setKey

void setKey(byte[] key)

Set the encryption key used for encrypting and decrypting. The key needs to be 16 bytes long.

Parameters:

key - the key

encrypt

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

Encrypt a number of bytes. This is done in-place, that means the bytes are overwritten.

Parameters:

bytes - the byte array

off - the start index

len - the number of bytes to encrypt

decrypt

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

Decrypt a number of bytes. This is done in-place, that means the bytes are overwritten.

Parameters:

bytes - the byte array

off - the start index

len - the number of bytes to decrypt

getKeyLength

int getKeyLength()

Get the length of the key in bytes.

Returns:

the length of the key