Top Description Fields Constructors Methods
org.bouncycastle.crypto.engines

public Class SEEDEngine

extends Object
implements BlockCipher
Class Inheritance
All Implemented Interfaces
org.bouncycastle.crypto.BlockCipher
Imports
org.bouncycastle.crypto.BlockCipher, .CipherParameters, .CryptoServicesRegistrar, .DataLengthException, .OutputLengthException, org.bouncycastle.crypto.constraints.DefaultServiceProperties, org.bouncycastle.crypto.params.KeyParameter
Implementation of the SEED algorithm as described in RFC 4009

Field Summary

Modifier and TypeField and Description
private final int
BLOCK_SIZE

private boolean
forEncryption

private static final int[]
KC

private static final int[]
SS0

private static final int[]
SS1

private static final int[]
SS2

private static final int[]
SS3

private int[]
wKey

Constructor Summary

AccessConstructor and Description
public
SEEDEngine()

Method Summary

Modifier and TypeMethod and Description
private long
bytesToLong(byte[] src, int srcOff)

private int[]
createWorkingKey(byte[] inKey)

private int
extractW0(long lVal)

private int
extractW1(long lVal)

private long
F(int ki0, int ki1, long r)

private int
G(int x)

public String
getAlgorithmName()

Implements org.bouncycastle.crypto.BlockCipher.getAlgorithmName.

Return the name of the algorithm the cipher implements.
public int
getBlockSize()

Implements org.bouncycastle.crypto.BlockCipher.getBlockSize.

Return the block size for this cipher (in bytes).
public void
init(boolean
if true the cipher is initialised for encryption, if false for decryption.
forEncryption, CipherParameters
the key and other data required by the cipher.
params)

Implements org.bouncycastle.crypto.BlockCipher.init.

Initialise the cipher.
private void
longToBytes(byte[] dest, int destOff, long value)

private int
phaseCalc1(int r0, int ki0, int r1, int ki1)

private int
phaseCalc2(int r0, int ki0, int r1, int ki1)

public int
processBlock(byte[]
the array containing the input data.
in, int
offset into the in array the data starts at.
inOff, byte[]
the array the output data will be copied into.
out, int
the offset into the out array the output will start at.
outOff)

Implements org.bouncycastle.crypto.BlockCipher.processBlock.

Process one block of input from the array in and write it to the out array.
public void
reset()

Implements org.bouncycastle.crypto.BlockCipher.reset.

Reset the cipher.
private long
rotateLeft8(long x)

private long
rotateRight8(long x)

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

BLOCK_SIZEback to summary
private final int BLOCK_SIZE
forEncryptionback to summary
private boolean forEncryption
KCback to summary
private static final int[] KC
SS0back to summary
private static final int[] SS0
SS1back to summary
private static final int[] SS1
SS2back to summary
private static final int[] SS2
SS3back to summary
private static final int[] SS3
wKeyback to summary
private int[] wKey

Constructor Detail

SEEDEngineback to summary
public SEEDEngine()

Method Detail

bytesToLongback to summary
private long bytesToLong(byte[] src, int srcOff)
createWorkingKeyback to summary
private int[] createWorkingKey(byte[] inKey)
extractW0back to summary
private int extractW0(long lVal)
extractW1back to summary
private int extractW1(long lVal)
Fback to summary
private long F(int ki0, int ki1, long r)
Gback to summary
private int G(int x)
getAlgorithmNameback to summary
public String getAlgorithmName()

Implements org.bouncycastle.crypto.BlockCipher.getAlgorithmName.

Doc from org.bouncycastle.crypto.BlockCipher.getAlgorithmName.

Return the name of the algorithm the cipher implements.

Returns:String

the name of the algorithm the cipher implements.

getBlockSizeback to summary
public int getBlockSize()

Implements org.bouncycastle.crypto.BlockCipher.getBlockSize.

Doc from org.bouncycastle.crypto.BlockCipher.getBlockSize.

Return the block size for this cipher (in bytes).

Returns:int

the block size for this cipher in bytes.

initback to summary
public void init(boolean forEncryption, CipherParameters params) throws IllegalArgumentException

Implements org.bouncycastle.crypto.BlockCipher.init.

Doc from org.bouncycastle.crypto.BlockCipher.init.

Initialise the cipher.

Parameters
forEncryption:boolean

if true the cipher is initialised for encryption, if false for decryption.

params:CipherParameters

the key and other data required by the cipher.

Exceptions
IllegalArgumentException:
if the params argument is inappropriate.
longToBytesback to summary
private void longToBytes(byte[] dest, int destOff, long value)
phaseCalc1back to summary
private int phaseCalc1(int r0, int ki0, int r1, int ki1)
phaseCalc2back to summary
private int phaseCalc2(int r0, int ki0, int r1, int ki1)
processBlockback to summary
public int processBlock(byte[] in, int inOff, byte[] out, int outOff) throws DataLengthException, IllegalStateException

Implements org.bouncycastle.crypto.BlockCipher.processBlock.

Doc from org.bouncycastle.crypto.BlockCipher.processBlock.

Process one block of input from the array in and write it to the out array.

Parameters
in:byte[]

the array containing the input data.

inOff:int

offset into the in array the data starts at.

out:byte[]

the array the output data will be copied into.

outOff:int

the offset into the out array the output will start at.

Returns:int

the number of bytes processed and produced.

Exceptions
DataLengthException:
if there isn't enough data in input , or space in out.
IllegalStateException:
if the cipher isn't initialised.
resetback to summary
public void reset()

Implements org.bouncycastle.crypto.BlockCipher.reset.

Doc from org.bouncycastle.crypto.BlockCipher.reset.

Reset the cipher. After resetting the cipher is in the same state as it was after the last init (if there was one).

rotateLeft8back to summary
private long rotateLeft8(long x)
rotateRight8back to summary
private long rotateRight8(long x)