Subversion Repositories openrisc

/* GnuSecretKey.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.  */

package gnu.javax.crypto.key;

import gnu.java.security.util.Util;

import java.security.Key;

/**

 * A secret key composed of a sequence of raw, unformatted octets. This class is

 * analogous to the {@link javax.crypto.spec.SecretKeySpec} class, but is

 * provided for platforms that do not or cannot contain that class.

 */

public class GnuSecretKey

    implements Key

{

  private final byte[] key;

  private final String algorithm;

  /**

   * Creates a new secret key. The supplied byte array is copied by this

   * constructor.

   *

   * @param key The raw, secret key.

   * @param algorithm The algorithm name, which can be null or empty.

   */

  public GnuSecretKey(byte[] key, String algorithm)

  {

    this(key, 0, key.length, algorithm);

  }

  /**

   * Creates a new secret key from a portion of a byte array.

   *

   * @param key The raw, secret key.

   * @param offset The offset at which the key begins.

   * @param length The number of bytes that comprise the key.

   * @param algorithm The algorithm name, which can be null or empty.

   */

  public GnuSecretKey(byte[] key, int offset, int length, String algorithm)

  {

    this.key = new byte[length];

    System.arraycopy(key, offset, this.key, 0, length);

    this.algorithm = algorithm;

  }

  /**

   * Returns the algorithm name, if any.

   *

   * @return The algorithm name.

   */

  public String getAlgorithm()

  {

    return null;

  }

  /**

   * Returns the encoded key, which is merely the byte array this class was

   * created with. A reference to the internal byte array is returned, so the

   * caller can delete this key from memory by modifying the returned array.

   *

   * @return The raw key.

   */

  public byte[] getEncoded()

  {

    return key;

  }

  /**

   * Returns the string "RAW".

   *

   * @return The string "RAW".

   */

  public String getFormat()

  {

    return "RAW";

  }

  public boolean equals(Object o)

  {

    if (! (o instanceof GnuSecretKey))

      return false;

    if (key.length != ((GnuSecretKey) o).key.length)

      return false;

    byte[] key2 = ((GnuSecretKey) o).key;

    for (int i = 0; i < key.length; i++)

      if (key[i] != key2[i])

        return false;

    return true;

  }

  public String toString()

  {

    return "GnuSecretKey [ " + algorithm + " " + Util.toString(key) + " ]";

  }

}