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java.lang.Object org.bouncycastle.crypto.engines.GOST28147Engine
public class GOST28147Engine
implementation of GOST 28147-89
Field Summary | |
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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 byte[] |
S
|
private static java.util.Hashtable |
sBoxes
|
private int[] |
workingKey
|
Constructor Summary | |
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GOST28147Engine()
standard constructor. |
Method Summary | |
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private int |
bytesToint(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. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected static final int BLOCK_SIZE
private int[] workingKey
private boolean forEncryption
private byte[] S
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 java.util.Hashtable sBoxes
Constructor Detail |
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public GOST28147Engine()
Method Detail |
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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 void intTobytes(int num, byte[] out, int outOff)
public static byte[] getSBox(java.lang.String sBoxName)
sBoxName
- name of the S-Box
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