public class GOST28147Engine extends java.lang.Object implements BlockCipher
Modifier and Type | Field and Description |
---|---|
protected static int |
BLOCK_SIZE |
private static byte[] |
DSbox_A |
private static byte[] |
DSbox_Test |
private static byte[] |
ESbox_A |
private static byte[] |
ESbox_B |
private static byte[] |
ESbox_C |
private static byte[] |
ESbox_D |
private static byte[] |
ESbox_Test |
private boolean |
forEncryption |
private static byte[] |
GOST_G |
private static byte[] |
S |
private static byte[] |
SBox_HASH |
private static java.util.Hashtable |
sBoxes |
private int[] |
workingKey |
Constructor and Description |
---|
GOST28147Engine()
standard constructor.
|
Modifier and Type | Method and Description |
---|---|
private int |
bytesToint(byte[] in,
int inOff) |
private int |
bytesToint64(byte[] in,
int inOff) |
private int[] |
generateWorkingKey(boolean forEncryption,
byte[] userKey) |
java.lang.String |
getAlgorithmName()
Return the name of the algorithm the cipher implements.
|
int |
getBlockSize()
Return the block size for this cipher (in bytes).
|
static byte[] |
getSBox(java.lang.String sBoxName)
Return the S-Box associated with SBoxName
|
private int |
GOST28147_mainStep(int n1,
int key) |
private void |
GOST28147Func(int[] workingKey,
byte[] in,
int inOff,
byte[] out,
int outOff) |
void |
init(boolean forEncryption,
CipherParameters params)
initialise an GOST28147 cipher.
|
private void |
intTobytes(int num,
byte[] out,
int outOff) |
int |
processBlock(byte[] in,
int inOff,
byte[] out,
int outOff)
Process one block of input from the array in and write it to
the out array.
|
void |
reset()
Reset the cipher.
|
protected static final int BLOCK_SIZE
private int[] workingKey
private boolean forEncryption
private static byte[] S
private static byte[] SBox_HASH
private static byte[] ESbox_Test
private static byte[] ESbox_A
private static byte[] ESbox_B
private static byte[] ESbox_C
private static byte[] ESbox_D
private static byte[] DSbox_Test
private static byte[] DSbox_A
private static byte[] GOST_G
private static java.util.Hashtable sBoxes
public void init(boolean forEncryption, CipherParameters params)
init
in interface BlockCipher
forEncryption
- whether or not we are for encryption.params
- the parameters required to set up the cipher.java.lang.IllegalArgumentException
- if the params argument is
inappropriate.public java.lang.String getAlgorithmName()
BlockCipher
getAlgorithmName
in interface BlockCipher
public int getBlockSize()
BlockCipher
getBlockSize
in interface BlockCipher
public int processBlock(byte[] in, int inOff, byte[] out, int outOff)
BlockCipher
processBlock
in interface BlockCipher
in
- the array containing the input data.inOff
- offset into the in array the data starts at.out
- the array the output data will be copied into.outOff
- the offset into the out array the output will start at.public void reset()
BlockCipher
reset
in interface BlockCipher
private int[] generateWorkingKey(boolean forEncryption, byte[] userKey)
private int GOST28147_mainStep(int n1, int key)
private void GOST28147Func(int[] workingKey, byte[] in, int inOff, byte[] out, int outOff)
private int bytesToint(byte[] in, int inOff)
private int bytesToint64(byte[] in, int inOff)
private void intTobytes(int num, byte[] out, int outOff)
public static byte[] getSBox(java.lang.String sBoxName)
sBoxName
- name of the S-BoxCopyright © 1998-2014 Gamma Technologies. All Rights Reserved.