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+/* ECB.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.mode;
+
+import gnu.java.security.Registry;
+import gnu.javax.crypto.cipher.IBlockCipher;
+
+/**
+ * The implementation of the Electronic Codebook mode.
+ * <p>
+ * The Electronic Codebook (ECB) mode is a confidentiality mode that is defined
+ * as follows:
+ * <ul>
+ * <li>ECB Encryption: C<sub>j</sub> = CIPH<sub>K</sub>(P<sub>j</sub>)
+ * for j = 1...n</li>
+ * <li>ECB Decryption: P<sub>j</sub> = CIPH<sup>-1</sup><sub>K</sub>(C<sub>j</sub>)
+ * for j = 1...n</li>
+ * </ul>
+ * <p>
+ * In ECB encryption, the forward cipher function is applied directly, and
+ * independently, to each block of the plaintext. The resulting sequence of
+ * output blocks is the ciphertext.
+ * <p>
+ * In ECB decryption, the inverse cipher function is applied directly, and
+ * independently, to each block of the ciphertext. The resulting sequence of
+ * output blocks is the plaintext.
+ * <p>
+ * References:
+ * <ol>
+ * <li><a
+ * href="http://csrc.nist.gov/encryption/modes/Recommendation/Modes01.pdf">
+ * Recommendation for Block Cipher Modes of Operation Methods and Techniques</a>,
+ * Morris Dworkin.</li>
+ * </ol>
+ */
+public class ECB
+    extends BaseMode
+    implements Cloneable
+{
+  /**
+   * Trivial package-private constructor for use by the Factory class.
+   * 
+   * @param underlyingCipher the underlying cipher implementation.
+   * @param cipherBlockSize the underlying cipher block size to use.
+   */
+  ECB(IBlockCipher underlyingCipher, int cipherBlockSize)
+  {
+    super(Registry.ECB_MODE, underlyingCipher, cipherBlockSize);
+  }
+
+  /**
+   * Private constructor for cloning purposes.
+   * 
+   * @param that the mode to clone.
+   */
+  private ECB(ECB that)
+  {
+    this((IBlockCipher) that.cipher.clone(), that.cipherBlockSize);
+  }
+
+  public Object clone()
+  {
+    return new ECB(this);
+  }
+
+  public void setup()
+  {
+    if (modeBlockSize != cipherBlockSize)
+      throw new IllegalArgumentException(IMode.MODE_BLOCK_SIZE);
+  }
+
+  public void teardown()
+  {
+  }
+
+  public void encryptBlock(byte[] in, int i, byte[] out, int o)
+  {
+    cipher.encryptBlock(in, i, out, o);
+  }
+
+  public void decryptBlock(byte[] in, int i, byte[] out, int o)
+  {
+    cipher.decryptBlock(in, i, out, o);
+  }
+}