freenet.crypt

Interface BlockCipher

All Known Implementing Classes:

Rijndael

public interface BlockCipher

Defines the interface that must be implemented by symmetric block ciphers used in the Freenet cryptography architecture

Method Summary

Modifier and Type	Method and Description
void	decipher(byte[] block, byte[] result) Deciphers the contents of block where block must be equal to getBlockSize()/8.
void	encipher(byte[] block, byte[] result) Enciphers the contents of block where block must be equal to getBlockSize()/8.
int	getBlockSize() Returns the block size, in bits, of the given block-cipher
int	getKeySize() Returns the key size, in bits, of the given block-cipher
void	initialize(byte[] key) Initializes the cipher context with the given key.

Method Detail

initialize

void initialize(byte[] key)

Initializes the cipher context with the given key. This might entail performing pre-encryption calculation of subkeys, S-Boxes, etc.

getKeySize

int getKeySize()

Returns the key size, in bits, of the given block-cipher

getBlockSize

int getBlockSize()

Returns the block size, in bits, of the given block-cipher

encipher

void encipher(byte[] block,
              byte[] result)

Enciphers the contents of block where block must be equal to getBlockSize()/8. The result is placed in result and, too has to have length getBlockSize()/8. Block and result may refer to the same array. Warning: It is not a guarantee that block will not be over- written in the course of the algorithm

decipher

void decipher(byte[] block,
              byte[] result)

Deciphers the contents of block where block must be equal to getBlockSize()/8. The result is placed in result and, too has to have length getBlockSize()/8. Block and result may refer to the same array. Warning: It is not a guarantee that block will not be over- written in the course of the algorithm