package gnu.crypto.jce.spec;
// --------------------------------------------------------------------------
// $Id: TMMHParameterSpec.java,v 1.2 2005/10/06 04:24:16 rsdio Exp $
//
// Copyright (C) 2002 Free Software Foundation, Inc.
//
// This file is part of GNU Crypto.
//
// GNU Crypto 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 Crypto 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 this program; if not, write to the
//
// Free Software Foundation, Inc.,
// 51 Franklin Street, 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
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// 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.
//
// --------------------------------------------------------------------------
import gnu.crypto.prng.IRandom;
import java.security.spec.AlgorithmParameterSpec;
/**
* This class represents the algorithm parameters for the Truncated
* Multi-Modular Hash function for use with JCE-derived instances of
* {@link gnu.crypto.mac.TMMH16}.
*
* <p>This class is little more than a container for the key stream, tag
* length, and prefix parameters for the TMMH algorithm.
*
* @version $Revision: 1.2 $
*/
public class TMMHParameterSpec implements AlgorithmParameterSpec {
// Constants and variables.
// -----------------------------------------------------------------------
/** The keystream. */
protected IRandom keystream;
/** The tag length. */
protected Integer tagLength;
/** The prefix. */
protected byte[] prefix;
// Constructors.
// -----------------------------------------------------------------------
/**
* Create a new parameter specification.
*
* @param keystream The (PRNG) key stream.
* @param tagLength The tag length.
* @param prefix The prefix.
*/
public
TMMHParameterSpec(IRandom keystream, Integer tagLength, byte[] prefix) {
this.keystream = keystream;
this.tagLength = tagLength;
this.prefix = prefix;
}
/**
* Create a new parameter specification with no prefix.
*
* @param keystream The (PRNG) key stream.
* @param tagLength The tag length.
*/
public TMMHParameterSpec(IRandom keystream, Integer tagLength) {
this(keystream, tagLength, null);
}
// Instance methods.
// -----------------------------------------------------------------------
/**
* Return the key stream this specification was initialized with.
*
* @return The key stream.
*/
public IRandom getKeystream() {
return keystream;
}
/**
* Return the tag length this specification was initialized with.
*
* @return The tag length.
*/
public Integer getTagLength() {
return tagLength;
}
/**
* Return the prefix, or <code>null</code> if no prefix was
* specified.
*
* @return The prefix.
*/
public byte[] getPrefix() {
return prefix;
}
}