org.apache.sshd.common.mac

Class BaseMac

java.lang.Object

org.apache.sshd.common.mac.BaseMac

All Implemented Interfaces:

AlgorithmNameProvider, Mac, MacInformation

public class BaseMac
extends java.lang.Object
implements Mac

Base class for Mac implementations based on the JCE provider.

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.String	algorithm
private int	bsize
private int	defbsize
private boolean	etmMode
private javax.crypto.Mac	mac
private java.lang.String	s
private byte[]	tmp

Constructor Summary

Constructors

Constructor and Description
BaseMac(java.lang.String algorithm, int bsize, int defbsize, boolean etmMode)

Method Summary

Modifier and Type	Method and Description
void	doFinal(byte[] buf, int offset)
java.lang.String	getAlgorithm()
int	getBlockSize()
int	getDefaultBlockSize()
void	init(byte[] key)
boolean	isEncryptThenMac()
java.lang.String	toString()
void	update(byte[] buf, int offset, int len)
void	updateUInt(long i)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.sshd.common.mac.Mac

doFinal, doFinal, update

Field Detail

algorithm

private final java.lang.String algorithm

defbsize

private final int defbsize

bsize

private final int bsize

tmp

private final byte[] tmp

etmMode

private final boolean etmMode

mac

private javax.crypto.Mac mac

s

private java.lang.String s

Constructor Detail

BaseMac

public BaseMac(java.lang.String algorithm,
               int bsize,
               int defbsize,
               boolean etmMode)

Method Detail

getAlgorithm

public java.lang.String getAlgorithm()

Specified by:

getAlgorithm in interface AlgorithmNameProvider

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

isEncryptThenMac

public boolean isEncryptThenMac()

Specified by:

isEncryptThenMac in interface MacInformation

init

public void init(byte[] key)
          throws java.lang.Exception

Specified by:

init in interface Mac

Throws:

java.lang.Exception

updateUInt

public void updateUInt(long i)

Specified by:

updateUInt in interface Mac

update

public void update(byte[] buf,
                   int offset,
                   int len)

Specified by:

update in interface Mac

doFinal

public void doFinal(byte[] buf,
                    int offset)
             throws java.lang.Exception

Specified by:

doFinal in interface Mac

Throws:

java.lang.Exception

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object