Package org.bouncycastle.crypto.digests

Class GOST3411Digest

java.lang.Object

org.bouncycastle.crypto.digests.GOST3411Digest

All Implemented Interfaces:

Digest, ExtendedDigest, Memoable

public class GOST3411Digest
extends Object
implements ExtendedDigest, Memoable

implementation of GOST R 34.11-94

Constructor Summary

Constructors

Constructor	Description
GOST3411Digest()	Standard constructor
GOST3411Digest(byte[] sBoxParam)	Constructor to allow use of a particular sbox with GOST28147
GOST3411Digest(byte[] sBoxParam, CryptoServicePurpose purpose)	Constructor to allow use of a particular sbox with GOST28147
GOST3411Digest(CryptoServicePurpose purpose)
GOST3411Digest(GOST3411Digest t)	Copy constructor.

Method Summary

Modifier and Type	Method	Description
Memoable	copy()	Produce a copy of this object with its configuration and in its current state.
protected CryptoServiceProperties	cryptoServiceProperties()
int	doFinal(byte[] out, int outOff)	close the digest, producing the final digest value.
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.
protected void	processBlock(byte[] in, int inOff)
void	reset()	reset the digest back to it's initial state.
void	reset(Memoable other)	Restore a copied object state into this object.
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

Constructor Details

GOST3411Digest

public GOST3411Digest()

Standard constructor

GOST3411Digest

public GOST3411Digest(CryptoServicePurpose purpose)

GOST3411Digest

public GOST3411Digest(byte[] sBoxParam)

Constructor to allow use of a particular sbox with GOST28147

See Also:

• GOST28147Engine.getSBox(String)

GOST3411Digest

public GOST3411Digest(byte[] sBoxParam,
 CryptoServicePurpose purpose)

Constructor to allow use of a particular sbox with GOST28147

See Also:

• GOST28147Engine.getSBox(String)

GOST3411Digest

public GOST3411Digest(GOST3411Digest t)

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

Method Details

getAlgorithmName

public 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.

processBlock

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

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

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.

copy

public Memoable copy()

Description copied from interface: Memoable

Produce a copy of this object with its configuration and in its current state.

The returned object may be used simply to store the state, or may be used as a similar object starting from the copied state.

Specified by:

copy in interface Memoable

reset

public void reset(Memoable other)

Description copied from interface: Memoable

Restore a copied object state into this object.

Implementations of this method should try to avoid or minimise memory allocation to perform the reset.

Specified by:

reset in interface Memoable

Parameters:

other - an object originally copied from an object of the same type as this instance.

cryptoServiceProperties

protected CryptoServiceProperties cryptoServiceProperties()