Makefile.in: Rebuilt.

* Makefile.in: Rebuilt.
	* Makefile.am (ordinary_java_source_files): Added new files.
	* java/security/AlgorithmParameterGenerator.java,
	java/security/AlgorithmParameters.java, java/security/Engine.java,
	java/security/Identity.java, java/security/IdentityScope.java,
	java/security/KeyFactory.java,
	java/security/KeyPairGenerator.java, java/security/KeyStore.java,
	java/security/MessageDigest.java, java/security/Policy.java,
	java/security/ProtectionDomain.java,
	java/security/SecureRandom.java, java/security/Security.java,
	java/security/Signature.java, java/security/SignatureSpi.java,
	java/security/SignedObject.java, java/security/Signer.java,
	java/security/interfaces/RSAMultiPrimePrivateCrtKey.java,
	java/security/spec/PSSParameterSpec.java,
	java/security/spec/RSAMultiPrimePrivateCrtKeySpec.java,
	java/security/spec/RSAOtherPrimeInfo.java: New versions from
	Classpath.

From-SVN: r65829

libjava/java/security/Engine.java

@@ -0,0 +1,152 @@
+/* Engine -- generic getInstance method.
+   Copyright (C) 2003  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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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 java.security;
+
+/**
+ * Generic implementation of the getInstance methods in the various
+ * engine classes in java.security.
+ * <p>
+ * These classes ({@link java.security.Signature} for example) can be
+ * thought of as the "chrome, upholstery, and steering wheel", and the SPI
+ * (service provider interface, e.g. {@link java.security.SignatureSpi})
+ * classes can be thought of as the "engine" -- providing the actual
+ * functionality of whatever cryptographic algorithm the instance
+ * represents.
+ *
+ * @see Provider
+ * @author Casey Marshall 
+ */
+final class Engine
+{
+
+  // Constants.
+  // ------------------------------------------------------------------------
+
+  /** Prefix for aliases. */
+  private static final String ALG_ALIAS = "Alg.Alias.";
+
+  /** Maximum number of aliases to try. */
+  private static final int MAX_ALIASES = 5;
+
+  // Constructor.
+  // ------------------------------------------------------------------------
+
+  /** This class cannot be instantiated. */
+  private Engine() { }
+
+  // Class method.
+  // ------------------------------------------------------------------------
+
+  /**
+   * Get the implementation for <i>algorithm</i> for service
+   * <i>service</i> from <i>provider</i>. The service is e.g.
+   * "Signature", and the algorithm "DSA".
+   *
+   * @param service   The service name.
+   * @param algorithm The name of the algorithm to get.
+   * @param provider  The provider to get the implementation from.
+   * @return The engine class for the specified algorithm; the object
+   *         returned is typically a subclass of the SPI class for that
+   *         service, but callers should check that this is so.
+   * @throws NoSuchAlgorithmException If the implementation cannot be
+   *         found or cannot be instantiated.
+   * @throws IllegalArgumentException If any of the three arguments are null.
+   */
+  static Object
+  getInstance(String service, String algorithm, Provider provider)
+  throws NoSuchAlgorithmException
+  {
+    if (service == null || algorithm == null || provider == null)
+      throw new IllegalArgumentException();
+
+    // If there is no property "service.algorithm"
+    if (provider.getProperty(service + "." + algorithm) == null)
+      {
+        // Iterate through aliases, until we find the class name or resolve
+        // too many aliases.
+        String alias = null;
+        int count = 0;
+        while ((alias = provider.getProperty(
+                ALG_ALIAS + service + "." + algorithm)) != null)
+          {
+            if (algorithm.equals(alias))  // Refers to itself!
+              break;
+            algorithm = alias;
+            if (count++ > MAX_ALIASES)
+              throw new NoSuchAlgorithmException("too many aliases");
+          }
+        if (provider.getProperty(service + "." + algorithm) == null)
+          throw new NoSuchAlgorithmException(algorithm);
+      }
+
+    // Find and instantiate the implementation.
+    Class clazz = null;
+    ClassLoader loader = provider.getClass().getClassLoader();
+    String error = algorithm;
+    try
+      {
+        if (loader != null)
+          clazz = loader.loadClass(provider.getProperty(service+"."+algorithm));
+        else
+          clazz = Class.forName(provider.getProperty(service+"."+algorithm));
+        return clazz.newInstance();
+      }
+    catch (ClassNotFoundException cnfe)
+      {
+        error = "class not found: " + algorithm;
+      }
+    catch (IllegalAccessException iae)
+      {
+        error = "illegal access: " + iae.getMessage();
+      }
+    catch (InstantiationException ie)
+      {
+        error = "instantiation exception: " + ie.getMessage();
+      }
+    catch (ExceptionInInitializerError eiie)
+      {
+        error = "exception in initializer: " + eiie.getMessage();
+      }
+    catch (SecurityException se)
+      {
+        error = "security exception: " + se.getMessage();
+      }
+
+    throw new NoSuchAlgorithmException(error);
+  }
+}