gnu.java.security.hash

Class Sha384

Implemented Interfaces:
Cloneable, IMessageDigest

public class Sha384
extends BaseHash

Implementation of SHA2-2 [SHA-384] per the IETF Draft Specification.

References:

  1. Descriptions of SHA-256, SHA-384, and SHA-512,
  2. http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf

Field Summary

Fields inherited from class gnu.java.security.hash.BaseHash

blockSize, buffer, count, hashSize, name

Constructor Summary

Sha384()
Trivial 0-arguments constructor.

Method Summary

static long[]
G(long hh0, long hh1, long hh2, long hh3, long hh4, long hh5, long hh6, long hh7, byte[] in, int offset)
Object
clone()
This method may be called to create a new copy of the Object.
protected byte[]
getResult()
protected byte[]
padBuffer()
protected void
resetContext()
boolean
selfTest()
protected void
transform(byte[] in, int offset)

Methods inherited from class gnu.java.security.hash.BaseHash

blockSize, clone, digest, getResult, hashSize, name, padBuffer, reset, resetContext, selfTest, transform, update, update, update

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Sha384

public Sha384()
Trivial 0-arguments constructor.

Method Details

G

public static final long[] G(long hh0,
                             long hh1,
                             long hh2,
                             long hh3,
                             long hh4,
                             long hh5,
                             long hh6,
                             long hh7,
                             byte[] in,
                             int offset)

clone

public Object clone()
This method may be called to create a new copy of the Object. The typical behavior is as follows:
  • o == o.clone() is false
  • o.getClass() == o.clone().getClass() is true
  • o.equals(o) is true

However, these are not strict requirements, and may be violated if necessary. Of the three requirements, the last is the most commonly violated, particularly if the subclass does not override Object.equals(Object).

If the Object you call clone() on does not implement Cloneable (which is a placeholder interface), then a CloneNotSupportedException is thrown. Notice that Object does not implement Cloneable; this method exists as a convenience for subclasses that do.

Object's implementation of clone allocates space for the new Object using the correct class, without calling any constructors, and then fills in all of the new field values with the old field values. Thus, it is a shallow copy. However, subclasses are permitted to make a deep copy.

All array types implement Cloneable, and override this method as follows (it should never fail):

 public Object clone()
 {
   try
     {
       super.clone();
     }
   catch (CloneNotSupportedException e)
     {
       throw new InternalError(e.getMessage());
     }
 }
 
Specified by:
clone in interface IMessageDigest
Overrides:
clone in interface BaseHash
Returns:
a copy of the Object
See Also:
Cloneable

getResult

protected byte[] getResult()
Overrides:
getResult in interface BaseHash

padBuffer

protected byte[] padBuffer()
Overrides:
padBuffer in interface BaseHash

resetContext

protected void resetContext()
Overrides:
resetContext in interface BaseHash

selfTest

public boolean selfTest()
Specified by:
selfTest in interface IMessageDigest
Overrides:
selfTest in interface BaseHash

transform

protected void transform(byte[] in,
                         int offset)
Overrides:
transform in interface BaseHash

Sha384.java -- Copyright (C) 2003, 2006 Free Software Foundation, Inc. This file is a part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.