com.maverick.ssh.components.jce
Class AbstractHmac

java.lang.Object
  com.maverick.ssh.components.jce.AbstractHmac

All Implemented Interfaces:

SshHmac

Direct Known Subclasses:

HmacMD5, HmacSha1

public abstract class AbstractHmac

extends java.lang.Object

implements SshHmac

An abstract class that implements the SshHmac interface to provide support for JCE based message authentication.

Author:

Lee David Painter

Constructor Summary

AbstractHmac(java.lang.String jceAlgorithm, int macLength)

Method Summary

void	generate(long sequenceNo, byte[] data, int offset, int len, byte[] output, int start)
abstract java.lang.String	getAlgorithm()
int	getMacLength()
void	init(byte[] keydata)
boolean	verify(long sequenceNo, byte[] data, int start, int len, byte[] mac, int offset)

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractHmac

public AbstractHmac(java.lang.String jceAlgorithm,
                    int macLength)

Method Detail

generate

public void generate(long sequenceNo,
                     byte[] data,
                     int offset,
                     int len,
                     byte[] output,
                     int start)

Specified by:

generate in interface SshHmac

getAlgorithm

public abstract java.lang.String getAlgorithm()

Specified by:

getAlgorithm in interface SshHmac

getMacLength

public int getMacLength()

Specified by:

getMacLength in interface SshHmac

init

public void init(byte[] keydata)
          throws SshException

Specified by:

init in interface SshHmac

Throws:

SshException

verify

public boolean verify(long sequenceNo,
                      byte[] data,
                      int start,
                      int len,
                      byte[] mac,
                      int offset)

Specified by:

verify in interface SshHmac