| /* 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) |
| { |
| if (o instanceof SecretKeySpec) |
| { |
| 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()); |
| } |
| else |
| { |
| return false; |
| } |
| } |
| |
| 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(); |
| } |
| } |