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+/* CipherFactory.java --
+ Copyright (C) 2001, 2002, 2003, 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.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * A <i>Factory</i> to instantiate symmetric block cipher instances.
+ */
+public class CipherFactory
+ implements Registry
+{
+ /** Trivial constructor to enforce Singleton pattern. */
+ private CipherFactory()
+ {
+ super();
+ }
+
+ /**
+ * Returns an instance of a block cipher given its name.
+ *
+ * @param name the case-insensitive name of the symmetric-key block cipher
+ * algorithm.
+ * @return an instance of the designated cipher algorithm, or
+ * <code>null</code> if none is found.
+ * @exception InternalError if the implementation does not pass its self-test.
+ */
+ public static final IBlockCipher getInstance(String name)
+ {
+ if (name == null)
+ return null;
+ name = name.trim();
+ IBlockCipher result = null;
+ if (name.equalsIgnoreCase(ANUBIS_CIPHER))
+ result = new Anubis();
+ else if (name.equalsIgnoreCase(BLOWFISH_CIPHER))
+ result = new Blowfish();
+ else if (name.equalsIgnoreCase(DES_CIPHER))
+ result = new DES();
+ else if (name.equalsIgnoreCase(KHAZAD_CIPHER))
+ result = new Khazad();
+ else if (name.equalsIgnoreCase(RIJNDAEL_CIPHER)
+ || name.equalsIgnoreCase(AES_CIPHER))
+ result = new Rijndael();
+ else if (name.equalsIgnoreCase(SERPENT_CIPHER))
+ result = new Serpent();
+ else if (name.equalsIgnoreCase(SQUARE_CIPHER))
+ result = new Square();
+ else if (name.equalsIgnoreCase(TRIPLEDES_CIPHER)
+ || name.equalsIgnoreCase(DESEDE_CIPHER))
+ result = new TripleDES();
+ else if (name.equalsIgnoreCase(TWOFISH_CIPHER))
+ result = new Twofish();
+ else if (name.equalsIgnoreCase(CAST5_CIPHER)
+ || (name.equalsIgnoreCase(CAST128_CIPHER)
+ || (name.equalsIgnoreCase(CAST_128_CIPHER))))
+ result = new Cast5();
+ else if (name.equalsIgnoreCase(NULL_CIPHER))
+ result = new NullCipher();
+
+ if (result != null && ! result.selfTest())
+ throw new InternalError(result.name());
+
+ return result;
+ }
+
+ /**
+ * Returns a {@link Set} of symmetric key block cipher implementation names
+ * supported by this <i>Factory</i>.
+ *
+ * @return a {@link Set} of block cipher names (Strings).
+ */
+ public static final Set getNames()
+ {
+ HashSet hs = new HashSet();
+ hs.add(ANUBIS_CIPHER);
+ hs.add(BLOWFISH_CIPHER);
+ hs.add(DES_CIPHER);
+ hs.add(KHAZAD_CIPHER);
+ hs.add(RIJNDAEL_CIPHER);
+ hs.add(SERPENT_CIPHER);
+ hs.add(SQUARE_CIPHER);
+ hs.add(TRIPLEDES_CIPHER);
+ hs.add(TWOFISH_CIPHER);
+ hs.add(CAST5_CIPHER);
+ hs.add(NULL_CIPHER);
+ return Collections.unmodifiableSet(hs);
+ }
+}