org.bouncycastle.crypto.digests
Class GOST3411Digest

java.lang.Object
  org.bouncycastle.crypto.digests.GOST3411Digest

All Implemented Interfaces:

Digest, ExtendedDigest

public class GOST3411Digest
extends java.lang.Object
implements ExtendedDigest

implementation of GOST R 34.11-94

Field Summary

(package private) byte[]	a
private long	byteCount
private byte[][]	C
private static byte[]	C2 reset the chaining variables to the IV values.
private BlockCipher	cipher
private static int	DIGEST_LENGTH
private byte[]	H
private byte[]	K
private byte[]	L
private byte[]	M
(package private) byte[]	S
private byte[]	Sum
(package private) byte[]	U
(package private) byte[]	V
(package private) byte[]	W
(package private) short[]	w_S
(package private) short[]	wS
private byte[]	xBuf
private int	xBufOff

Constructor Summary

GOST3411Digest()
Standard constructor

GOST3411Digest(GOST3411Digest t)
Copy constructor.

Method Summary

private byte[]	A(byte[] in)
private void	cpyBytesToShort(byte[] S, short[] wS)
private void	cpyShortToBytes(short[] wS, byte[] S)
int	doFinal(byte[] out, int outOff) close the digest, producing the final digest value.
private void	E(byte[] key, byte[] s, int sOff, byte[] in, int inOff)
private void	finish()
private void	fw(byte[] in)
java.lang.String	getAlgorithmName() return the algorithm name
int	getByteLength() Return the size in bytes of the internal buffer the digest applies it's compression function to.
int	getDigestSize() return the size, in bytes, of the digest produced by this message digest.
private void	LongToBytes(long r, byte[] out, int outOff)
private byte[]	P(byte[] in)
protected void	processBlock(byte[] in, int inOff)
void	reset() reset the digest back to it's initial state.
private void	sumByteArray(byte[] in)
void	update(byte in) update the message digest with a single byte.
void	update(byte[] in, int inOff, int len) update the message digest with a block of bytes.

Methods inherited from class java.lang.Object

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

Field Detail

DIGEST_LENGTH

private static final int DIGEST_LENGTH

See Also:

Constant Field Values

H

private byte[] H

L

private byte[] L

M

private byte[] M

Sum

private byte[] Sum

C

private byte[][] C

xBuf

private byte[] xBuf

xBufOff

private int xBufOff

byteCount

private long byteCount

cipher

private BlockCipher cipher

K

private byte[] K

a

byte[] a

wS

short[] wS

w_S

short[] w_S

S

byte[] S

U

byte[] U

V

byte[] V

W

byte[] W

C2

private static final byte[] C2

reset the chaining variables to the IV values.

Constructor Detail

GOST3411Digest

public GOST3411Digest()

Standard constructor

GOST3411Digest

public GOST3411Digest(GOST3411Digest t)

Copy constructor. This will copy the state of the provided message digest.

Method Detail

getAlgorithmName

public java.lang.String getAlgorithmName()

Description copied from interface: Digest

return the algorithm name

Specified by:

getAlgorithmName in interface Digest

Returns:

the algorithm name

getDigestSize

public int getDigestSize()

Description copied from interface: Digest

return the size, in bytes, of the digest produced by this message digest.

Specified by:

getDigestSize in interface Digest

Returns:

the size, in bytes, of the digest produced by this message digest.

update

public void update(byte in)

Description copied from interface: Digest

update the message digest with a single byte.

Specified by:

update in interface Digest

Parameters:

in - the input byte to be entered.

update

public void update(byte[] in,
                   int inOff,
                   int len)

Description copied from interface: Digest

update the message digest with a block of bytes.

Specified by:

update in interface Digest

Parameters:

in - the byte array containing the data.

inOff - the offset into the byte array where the data starts.

len - the length of the data.

P

private byte[] P(byte[] in)

A

private byte[] A(byte[] in)

E

private void E(byte[] key,
               byte[] s,
               int sOff,
               byte[] in,
               int inOff)

fw

private void fw(byte[] in)

processBlock

protected void processBlock(byte[] in,
                            int inOff)

finish

private void finish()

doFinal

public int doFinal(byte[] out,
                   int outOff)

Description copied from interface: Digest

close the digest, producing the final digest value. The doFinal call leaves the digest reset.

Specified by:

doFinal in interface Digest

Parameters:

out - the array the digest is to be copied into.

outOff - the offset into the out array the digest is to start at.

reset

public void reset()

Description copied from interface: Digest

reset the digest back to it's initial state.

Specified by:

reset in interface Digest

sumByteArray

private void sumByteArray(byte[] in)

LongToBytes

private void LongToBytes(long r,
                         byte[] out,
                         int outOff)

cpyBytesToShort

private void cpyBytesToShort(byte[] S,
                             short[] wS)

cpyShortToBytes

private void cpyShortToBytes(short[] wS,
                             byte[] S)

getByteLength

public int getByteLength()

Description copied from interface: ExtendedDigest

Return the size in bytes of the internal buffer the digest applies it's compression function to.

Specified by:

getByteLength in interface ExtendedDigest

Returns:

byte length of the digests internal buffer.