| /* NullCipher.java -- |
| Copyright (C) 2001, 2002, 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.cipher; |
| |
| import gnu.java.security.Registry; |
| |
| import java.security.InvalidKeyException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Iterator; |
| |
| /** |
| * The implementation of a Null block cipher. |
| * <p> |
| * This cipher does not alter its input at all, claims to process block sizes |
| * 128-, 192- and 256-bit long, and key sizes from 64- to 512-bit in 8-bit |
| * increments. |
| */ |
| public final class NullCipher |
| extends BaseCipher |
| { |
| /** Trivial 0-arguments constructor. */ |
| public NullCipher() |
| { |
| super(Registry.NULL_CIPHER, 16, 16); |
| } |
| |
| public Object clone() |
| { |
| NullCipher result = new NullCipher(); |
| result.currentBlockSize = this.currentBlockSize; |
| return result; |
| } |
| |
| public Iterator blockSizes() |
| { |
| ArrayList al = new ArrayList(); |
| al.add(Integer.valueOf(64 / 8)); |
| al.add(Integer.valueOf(128 / 8)); |
| al.add(Integer.valueOf(192 / 8)); |
| al.add(Integer.valueOf(256 / 8)); |
| return Collections.unmodifiableList(al).iterator(); |
| } |
| |
| public Iterator keySizes() |
| { |
| ArrayList al = new ArrayList(); |
| for (int n = 8; n < 64; n++) |
| al.add(Integer.valueOf(n)); |
| return Collections.unmodifiableList(al).iterator(); |
| } |
| |
| public Object makeKey(byte[] uk, int bs) throws InvalidKeyException |
| { |
| return new Object(); |
| } |
| |
| public void encrypt(byte[] in, int i, byte[] out, int j, Object k, int bs) |
| { |
| System.arraycopy(in, i, out, j, bs); |
| } |
| |
| public void decrypt(byte[] in, int i, byte[] out, int j, Object k, int bs) |
| { |
| System.arraycopy(in, i, out, j, bs); |
| } |
| |
| public boolean selfTest() |
| { |
| return true; |
| } |
| } |