Class Poly1305Mac

java.lang.Object

org.apache.sshd.common.mac.Poly1305Mac

All Implemented Interfaces:

AlgorithmNameProvider, Mac, MacInformation

public class Poly1305Mac
extends Object
implements Mac

Poly1305 one-time message authentication code. This implementation is derived from the public domain C library poly1305-donna.

See Also:

• The Poly1305-AES message-authentication code

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	BLOCK_SIZE
private final byte[]	currentBlock
private int	currentBlockOffset
private int	h0
private int	h1
private int	h2
private int	h3
private int	h4
private long	k0
private long	k1
private long	k2
private long	k3
static final int	KEY_BYTES
private long	r0
private long	r1
private long	r2
private long	r3
private long	r4
private long	s1
private long	s2
private long	s3
private long	s4

Constructor Summary

Constructors

Constructor	Description
Poly1305Mac()

Method Summary

Modifier and Type	Method	Description
void	doFinal(byte[] out, int offset)
String	getAlgorithm()
int	getBlockSize()
int	getDefaultBlockSize()
void	init(byte[] key)
static void	packIntLE(int value, byte[] dst, int off)
private void	processBlock(byte[] block, int offset, int length)
private void	reset()
static int	unpackIntLE(byte[] buf, int off)
void	update(byte[] in, int offset, int length)
void	updateUInt(long value)

Methods inherited from class Object

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

Methods inherited from interface Mac

doFinal, doFinal, update

Methods inherited from interface MacInformation

isEncryptThenMac

Field Details

KEY_BYTES

public static final int KEY_BYTES

See Also:

• Constant Field Values

BLOCK_SIZE

private static final int BLOCK_SIZE

See Also:

• Constant Field Values

r0

private long r0

r1

private long r1

r2

private long r2

r3

private long r3

r4

private long r4

s1

private long s1

s2

private long s2

s3

private long s3

s4

private long s4

k0

private long k0

k1

private long k1

k2

private long k2

k3

private long k3

h0

private int h0

h1

private int h1

h2

private int h2

h3

private int h3

h4

private int h4

currentBlock

private final byte[] currentBlock

currentBlockOffset

private int currentBlockOffset

Constructor Details

Poly1305Mac

public Poly1305Mac()

Method Details

getAlgorithm

public String getAlgorithm()

Specified by:

getAlgorithm in interface AlgorithmNameProvider

init

public void init(byte[] key)
          throws Exception

Specified by:

init in interface Mac

Throws:

Exception

update

public void update(byte[] in,
 int offset,
 int length)

Specified by:

update in interface Mac

updateUInt

public void updateUInt(long value)

Specified by:

updateUInt in interface Mac

doFinal

public void doFinal(byte[] out,
 int offset)
             throws Exception

Specified by:

doFinal in interface Mac

Throws:

Exception

processBlock

private void processBlock(byte[] block,
 int offset,
 int length)

reset

private void reset()

getBlockSize

public int getBlockSize()

Specified by:

getBlockSize in interface MacInformation

Returns:

MAC output block size in bytes - may be less than the default - e.g., MD5-96

getDefaultBlockSize

public int getDefaultBlockSize()

Specified by:

getDefaultBlockSize in interface MacInformation

Returns:

The "natural" MAC block size in bytes

unpackIntLE

public static int unpackIntLE(byte[] buf,
 int off)

packIntLE

public static void packIntLE(int value,
 byte[] dst,
 int off)