2005-09-25 Casey Marshall <csm@gnu.org>

	* gnu/java/security/provider/Gnu.java
	(<init>): add Diffie-Hellman key factory and key pair generator.
	* gnu/java/security/provdier/DiffieHellmanKeyFactoryImpl.java,
	gnu/java/security/provider/DiffieHellmanKeyPairGeneratorImpl.java:
	new files.

1 files changed, 123 insertions, 0 deletions

diff --git a/gnu/java/security/provider/DiffieHellmanKeyFactoryImpl.java b/gnu/java/security/provider/DiffieHellmanKeyFactoryImpl.java
new file mode 100644
index 000000000..591fc688c
--- /dev/null
+++ b/gnu/java/security/provider/DiffieHellmanKeyFactoryImpl.java
@@ -0,0 +1,123 @@
+/* DiffieHellmanKeyFactoryImpl.java --
+   Copyright (C) 2005 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 gnu.java.security.provider;
+
+import gnu.javax.crypto.GnuDHPrivateKey;
+
+import java.security.InvalidKeyException;
+import java.security.Key;
+import java.security.KeyFactorySpi;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.KeySpec;
+
+import javax.crypto.spec.DHParameterSpec;
+import javax.crypto.spec.DHPrivateKeySpec;
+import javax.crypto.spec.DHPublicKeySpec;
+
+import javax.crypto.interfaces.DHPrivateKey;
+import javax.crypto.interfaces.DHPublicKey;
+
+public class DiffieHellmanKeyFactoryImpl extends KeyFactorySpi
+{
+  protected PrivateKey engineGeneratePrivate (final KeySpec spec)
+    throws InvalidKeySpecException
+  {
+    if (spec instanceof DHPrivateKeySpec)
+      {
+        DHPrivateKeySpec dh = (DHPrivateKeySpec) spec;
+        return new GnuDHPrivateKey (dh.getX (),
+                                    new DHParameterSpec (dh.getP (), dh.getG ()));
+      }
+    throw new InvalidKeySpecException ();
+  }
+
+  protected PublicKey engineGeneratePublic (final KeySpec spec)
+    throws InvalidKeySpecException
+  {
+    if (spec instanceof DHPublicKeySpec)
+      {
+        DHPublicKeySpec dh = (DHPublicKeySpec) spec;
+        return new GnuDHPublicKey (new DHParameterSpec (dh.getP (), dh.getG ()),
+                                   dh.getY(), null);
+      }
+    throw new InvalidKeySpecException ();
+  }
+
+  protected KeySpec engineGetKeySpec (final Key key, final Class specClass)
+    throws InvalidKeySpecException
+  {
+    if (key instanceof DHPrivateKey)
+      {
+        if (DHPrivateKeySpec.class.isAssignableFrom (specClass))
+          {
+            DHParameterSpec params = ((DHPrivateKey) key).getParams ();
+            return new DHPrivateKeySpec (((DHPrivateKey) key).getX (),
+                                         params.getP (), params.getG ());
+          }
+      }
+    if (key instanceof DHPublicKey)
+      {
+        if (DHPublicKeySpec.class.isAssignableFrom (specClass))
+          {
+            DHParameterSpec params = ((DHPublicKey) key).getParams ();
+            return new DHPublicKeySpec (((DHPublicKey) key).getY (),
+                                        params.getP (), params.getG ());
+          }
+      }
+    throw new InvalidKeySpecException ();
+  }
+
+  protected Key engineTranslateKey (final Key key)
+    throws InvalidKeyException
+  {
+    if (key instanceof DHPrivateKey)
+      {
+        return new GnuDHPrivateKey (((DHPrivateKey) key).getX (),
+                                    ((DHPrivateKey) key).getParams ());
+      }
+    if (key instanceof DHPublicKey)
+      {
+        return new GnuDHPublicKey (((DHPublicKey) key).getParams (),
+                                   ((DHPublicKey) key).getY (), null);
+      }
+    throw new InvalidKeyException ();
+  }
+}