Tuesday, 17 October 2017
BaseHash.java (base Sha & Ripemd hash digest algorithm Java source code file) Print E-mail
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//
// Creator:    http://www.dicelocksecurity.com
// Version:    vers.6.0.0.1
//
// Copyright (C) 2011-2012 DiceLock Security, LLC. All rights reserved.
//
//                               DISCLAIMER
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// DICELOCK IS A REGISTERED TRADEMARK OR TRADEMARK OF THE OWNERS.
//
// Environment:
// java version "1.6.0_29"
// Java(TM) SE Runtime Environment (build 1.6.0_29-b11)
// Java HotSpot(TM) Server VM (build 20.4-b02, mixed mode)
//
 
package com.dicelocksecurity.jdicelock.Hash;
 
import com.dicelocksecurity.jdicelock.CryptoRandomStream.BaseCryptoRandomStream;
 
/**
 * Base hash algorithm class
 *
 * @author      Angel Ferré @ DiceLock Security
 * @version     6.0.0.1
 * @since       2011-10-03
 */
public abstract class BaseHash {
 
    /**
     * Pointer to BaseCryptoRandomStream digest
     */
    protected BaseCryptoRandomStream messageDigest;
 
    /**
     * Constructor, default
     */
    public BaseHash() {
        super();
    }
 
    /**
     * Constructor assigning diggest BaseCryptoRandomStream
     *
     * @param    stream     BaseCryptoRandomStream hash algorithm digest stream
     */
    public BaseHash(BaseCryptoRandomStream stream) {
 
        this.messageDigest = stream;
        for (int i = 0; i < stream.GetUCLength(); i++) {
            stream.SetUCPosition(i, (byte)0x00);
        }
    }
 
    /**
     * Destructor
     */
    public void finalize() {
 
        this.messageDigest = null;
    }
 
    /**
     * Set the Message Digest BaseCryptoRandomStream
     *
     * @param    stream     BaseCryptoRandomStream hash algorithm digest stream
     */
    public void SetMessageDigest(BaseCryptoRandomStream stream) {
 
        this.messageDigest = stream;
        for (int i = 0; i < stream.GetUCLength(); i++) {
            stream.SetUCPosition(i, (byte)0x00);
        }
    }
 
    /**
     * Initialize BaseHash
     */
    abstract public void Initialize();
 
    /**
     * Adds the BaseCryptoRandomStream
     *
     * @param     stream    bit stream to be added to the hash
     */
    abstract public void Add(BaseCryptoRandomStream stream);
 
    /**
     * Finalize the hash
     */
    abstract public void Finalize();
 
    /**
     * Gets the hash
     *
     * @return    BaseCryptoRandomStream    gets BaseCryptoRandomStream hash digest stream
     */
    public BaseCryptoRandomStream GetMessageDigest() {
 
        return this.messageDigest;
    }
 
    /**
     * Gets hash length in bits
     *
     * @return   short:   hash length in bits
     */
    abstract public short GetBitHashLength();
 
    /**
     * Gets hash length in bytes
     *
     * @return   short:   hash length in bytes
     */
    abstract public short GetUCHashLength();
 
    /**
     * Gets hash length in shorts
     *
     * @return   short:   hash length in shorts
     */
    abstract public short GetUSHashLength();
 
    /**
     * Gets hash length in ints
     *
     * @return   short:   hash length in ints
     */
    abstract public short GetULHashLength();
 
    /**
     * Gets the number of bits in the hash block to be hashed
     *
     * @return    short:    number of bits in the hash block to be hashed
     */
    abstract public short GetBitHashBlockLength();
 
    /**
     * Gets the number of bytes in the hash block to be hashed
     *
     * @return    short:    number of bytes in the hash block to be hashed
     */
    abstract public short GetUCHashBlockLength();
 
    /**
     * Gets the number of shorts in the hash block to be hashed
     *
     * @return    short:    number of shorts in the hash block to be hashed
     */
    abstract public short GetUSHashBlockLength();
 
    /**
     * Gets the number of ints in the hash block to be hashed
     *
     * @return    short:    number of ints in the hash block to be hashed
     */
    abstract public short GetULHashBlockLength();
 
    /**
     * Gets the type of the object
     *
     * @return    Hashes:     Sha 512 enumerator name
     */
    abstract public Hashes GetType();
 
}