org.h2.security
Interface BlockCipher

All Known Implementing Classes:

AES, XTEA

public interface BlockCipher

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

Field Summary

static int

ALIGN Blocks sizes are always multiples of this number.

Method Summary

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