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-/* SecretKeySpec.java -- Wrapper for secret keys.
- Copyright (C) 2004 Free Software Foundation, Inc.
-
-This file is 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, 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; see the file COPYING. 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 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 javax.crypto.spec;
-
-import java.security.spec.KeySpec;
-
-import javax.crypto.SecretKey;
-
-/**
- * This is a simple wrapper around a raw byte array, for ciphers that do
- * not require any key parameters other than the bytes themselves.
- *
- * <p>Since this class implements {@link javax.crypto.SecretKey}, which
- * in turn extends {@link java.security.Key}, so instances of this class
- * may be passed directly to the <code>init()</code> methods of {@link
- * javax.crypto.Cipher}.
- *
- * @see javax.crypto.SecretKey
- * @see javax.crypto.SecretKeyFactory
- */
-public class SecretKeySpec implements KeySpec, SecretKey
-{
-
- // Constants and fields.
- // ------------------------------------------------------------------------
-
- /** Compatible with JDK1.4. */
- private static final long serialVersionUID = 6577238317307289933L;
-
- /** The key bytes. */
- private byte[] key;
-
- /** The algorithm's name. */
- private String algorithm;
-
- // Constructors.
- // ------------------------------------------------------------------------
-
- /**
- * Create a new secret key spec from an entire byte array.
- *
- * @param key The key material.
- * @param algorithm The name of the algorithm using this key.
- */
- public SecretKeySpec(byte[] key, String algorithm)
- {
- this(key, 0, key.length, algorithm);
- }
-
- /**
- * Create a new secret key spec from part of a byte array.
- *
- * @param key The key material.
- * @param off The offset at which key material begins.
- * @param len The length of key material.
- * @param algorithm The name of the algorithm using this key.
- */
- public SecretKeySpec(byte[] key, int off, int len, String algorithm)
- {
- this.key = new byte[len];
- this.algorithm = algorithm;
- System.arraycopy(key, off, this.key, 0, len);
- }
-
- // Instance methods.
- // ------------------------------------------------------------------------
-
- /**
- * Return the name of the algorithm associated with this secret key.
- *
- * @return The algorithm's name.
- */
- public String getAlgorithm()
- {
- return algorithm;
- }
-
- /**
- * Return the key as a byte array.
- *
- * @return The key material.
- */
- public byte[] getEncoded()
- {
- return key;
- }
-
- /**
- * This key's format, which is always "RAW".
- *
- * @return "RAW"
- */
- public String getFormat()
- {
- return "RAW";
- }
-
- public boolean equals(Object o)
- {
- byte[] okey = ((SecretKeySpec) o).getEncoded();
- if (key.length != okey.length) return false;
- for (int i = 0; i < key.length; i++)
- {
- if (key[i] != okey[i])
- return false;
- }
- return algorithm.equals(((SecretKeySpec) o).getAlgorithm());
- }
-
- public int hashCode()
- {
- int code = 0;
- for (int i = 0; i < key.length; i++)
- {
- code ^= (key[i] & 0xff) << (i << 3 & 31);
- }
- return code ^ algorithm.hashCode();
- }
-}
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