org.bouncycastle.crypto.engines

Class AESPacketCipher

java.lang.Object

org.bouncycastle.crypto.engines.AESPacketCipher

public class AESPacketCipher
extends java.lang.Object

A collection of blockwise methods implementing AES Copied from AESEngine

Field Summary

Fields

Modifier and Type	Field and Description
static int	BLOCK_SIZE

Constructor Summary

Constructors

Constructor and Description
AESPacketCipher()

Method Summary

Modifier and Type	Method and Description
static void	checkKeyLength(int keyLen) Check the key len and fail if not valid.
static byte[]	createS(boolean forEncryption)
static int[][]	generateWorkingKey(boolean forEncryption, byte[] key) Calculate the necessary round keys The number of calculations depends on key size and block size AES specified a fixed block size of 128 bits and key sizes 128/192/256 bits This code is written assuming those are the only possible values
static void	processBlock(boolean forEncryption, int[][] schedule, byte[] s, byte[] in, int inOff, byte[] out, int outOff) Does not allocate, does not do any bounds verification Intended to be used within larger implementation that asserts limits.

Methods inherited from class java.lang.Object

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

Field Detail

BLOCK_SIZE

public static final int BLOCK_SIZE

See Also:

Constant Field Values

Constructor Detail

AESPacketCipher

public AESPacketCipher()

Method Detail

createS

public static byte[] createS(boolean forEncryption)

generateWorkingKey

public static int[][] generateWorkingKey(boolean forEncryption,
                                         byte[] key)

Calculate the necessary round keys The number of calculations depends on key size and block size AES specified a fixed block size of 128 bits and key sizes 128/192/256 bits This code is written assuming those are the only possible values

processBlock

public static void processBlock(boolean forEncryption,
                                int[][] schedule,
                                byte[] s,
                                byte[] in,
                                int inOff,
                                byte[] out,
                                int outOff)

Does not allocate, does not do any bounds verification Intended to be used within larger implementation that asserts limits.

Parameters:

forEncryption - direction

schedule - the key schedule

s -

in -

inOff -

out -

outOff -

checkKeyLength

public static void checkKeyLength(int keyLen)
                           throws PacketCipherException

Check the key len and fail if not valid.

Parameters:

keyLen - The key len

Throws:

PacketCipherException