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+/* 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;
+ }
+}