org.spongycastle.crypto.digests

Class LongDigest

java.lang.Object

org.spongycastle.crypto.digests.LongDigest

All Implemented Interfaces:

Digest, EncodableDigest, ExtendedDigest, Memoable

Direct Known Subclasses:

SHA384Digest, SHA512Digest, SHA512tDigest

public abstract class LongDigest
extends java.lang.Object
implements ExtendedDigest, Memoable, EncodableDigest

Base class for SHA-384 and SHA-512.

Field Summary

Fields

Modifier and Type	Field and Description
protected long	H1
protected long	H2
protected long	H3
protected long	H4
protected long	H5
protected long	H6
protected long	H7
protected long	H8

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	LongDigest() Constructor for variable length word
protected	LongDigest(LongDigest t) Copy constructor.

Method Summary

Modifier and Type	Method and Description
protected void	copyIn(LongDigest t)
void	finish()
int	getByteLength() Return the size in bytes of the internal buffer the digest applies it's compression function to.
protected int	getEncodedStateSize()
protected void	populateState(byte[] state)
protected void	processBlock()
protected void	processLength(long lowW, long hiW)
protected void	processWord(byte[] in, int inOff)
void	reset() reset the digest back to it's initial state.
protected void	restoreState(byte[] encodedState)
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

Methods inherited from interface org.spongycastle.crypto.Digest

doFinal, getAlgorithmName, getDigestSize

Methods inherited from interface org.spongycastle.util.Memoable

copy, reset

Methods inherited from interface org.spongycastle.crypto.digests.EncodableDigest

getEncodedState

Field Detail

H1

protected long H1

H2

protected long H2

H3

protected long H3

H4

protected long H4

H5

protected long H5

H6

protected long H6

H7

protected long H7

H8

protected long H8

Constructor Detail

LongDigest

protected LongDigest()

Constructor for variable length word

LongDigest

protected LongDigest(LongDigest t)

Copy constructor. We are using copy constructors in place of the Object.clone() interface as this interface is not supported by J2ME.

Method Detail

copyIn

protected void copyIn(LongDigest t)

populateState

protected void populateState(byte[] state)

restoreState

protected void restoreState(byte[] encodedState)

getEncodedStateSize

protected int getEncodedStateSize()

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.

finish

public void finish()

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.

processWord

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

processLength

protected void processLength(long lowW,
                             long hiW)

processBlock

protected void processBlock()