org.apache.sshd.common.digest

Class BaseDigest

java.lang.Object

org.apache.sshd.common.digest.BaseDigest

All Implemented Interfaces:

java.lang.Comparable<Digest>, AlgorithmNameProvider, Digest, DigestInformation

public class BaseDigest
extends java.lang.Object
implements Digest

Base class for Digest algorithms based on the JCE provider.

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.String	algorithm
private int	bsize
private int	h
private java.security.MessageDigest	md
private java.lang.String	s

Constructor Summary

Constructors

Constructor and Description
BaseDigest(java.lang.String algorithm, int bsize) Create a new digest using the given algorithm and block size.

Method Summary

Modifier and Type	Method and Description
int	compareTo(Digest that)
byte[]	digest()
boolean	equals(java.lang.Object obj)
java.lang.String	getAlgorithm()
int	getBlockSize()
protected java.security.MessageDigest	getMessageDigest()
int	hashCode()
void	init()
java.lang.String	toString()
void	update(byte[] data)
void	update(byte[] data, int start, int len)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

algorithm

private final java.lang.String algorithm

bsize

private final int bsize

h

private int h

s

private java.lang.String s

md

private java.security.MessageDigest md

Constructor Detail

BaseDigest

public BaseDigest(java.lang.String algorithm,
                  int bsize)

Create a new digest using the given algorithm and block size. The initialization and creation of the underlying MessageDigest object will be done in the init() method.

Parameters:

algorithm - the JCE algorithm to use for this digest

bsize - the block size of this digest

Method Detail

getAlgorithm

public final java.lang.String getAlgorithm()

Specified by:

getAlgorithm in interface AlgorithmNameProvider

getBlockSize

public int getBlockSize()

Specified by:

getBlockSize in interface DigestInformation

Returns:

The number of bytes in the digest's output

init

public void init()
          throws java.lang.Exception

Specified by:

init in interface Digest

Throws:

java.lang.Exception

update

public void update(byte[] data)
            throws java.lang.Exception

Specified by:

update in interface Digest

Throws:

java.lang.Exception

update

public void update(byte[] data,
                   int start,
                   int len)
            throws java.lang.Exception

Specified by:

update in interface Digest

Throws:

java.lang.Exception

getMessageDigest

protected java.security.MessageDigest getMessageDigest()

Returns:

The current MessageDigest - may be null if init() not called

digest

public byte[] digest()
              throws java.lang.Exception

Specified by:

digest in interface Digest

Throws:

java.lang.Exception

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

compareTo

public int compareTo(Digest that)

Specified by:

compareTo in interface java.lang.Comparable<Digest>

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object