org.apache.sshd.common.digest

Class BaseDigest

java.lang.Object

org.apache.sshd.common.digest.BaseDigest

All Implemented Interfaces:

Comparable<Digest>, AlgorithmNameProvider, Digest, DigestInformation

public class BaseDigest
extends Object
implements Digest

Base class for Digest algorithms based on the JCE provider.

Author:

Apache MINA SSHD Project

Constructor Summary

Constructors

Constructor and Description
BaseDigest(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(Object obj)
String	getAlgorithm()
int	getBlockSize()
protected MessageDigest	getMessageDigest()
int	hashCode()
void	init()
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

Constructor Detail

BaseDigest

public BaseDigest(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 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 Exception

Specified by:

init in interface Digest

Throws:

Exception

update

public void update(byte[] data)
            throws Exception

Specified by:

update in interface Digest

Throws:

Exception

update

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

Specified by:

update in interface Digest

Throws:

Exception

getMessageDigest

protected MessageDigest getMessageDigest()

Returns:

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

digest

public byte[] digest()
              throws Exception

Specified by:

digest in interface Digest

Throws:

Exception

hashCode

public int hashCode()

Overrides:

hashCode in class Object

compareTo

public int compareTo(Digest that)

Specified by:

compareTo in interface Comparable<Digest>

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object