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1 files changed, 313 insertions, 0 deletions

diff --git a/libjava/classpath/java/security/KeyPairGenerator.java b/libjava/classpath/java/security/KeyPairGenerator.java
new file mode 100644
index 000000000..5e6bb1a3c
--- /dev/null
+++ b/libjava/classpath/java/security/KeyPairGenerator.java
@@ -0,0 +1,313 @@
+/* KeyPairGenerator.java --- Key Pair Generator Class
+   Copyright (C) 1999, 2002, 2003, 2004, 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 java.security;
+
+import gnu.java.lang.CPStringBuilder;
+
+import gnu.java.security.Engine;
+
+import java.lang.reflect.InvocationTargetException;
+import java.security.spec.AlgorithmParameterSpec;
+
+/**
+ * <code>KeyPairGenerator</code> is a class used to generate key-pairs for a
+ * security algorithm.
+ *
+ * <p>The <code>KeyPairGenerator</code> is created with the
+ * <code>getInstance()</code> Factory methods. It is used to generate a pair of
+ * public and private keys for a specific algorithm and associate this key-pair
+ * with the algorithm parameters it was initialized with.</p>
+ *
+ * @see KeyPair
+ * @see AlgorithmParameterSpec
+ * @author Mark Benvenuto
+ * @author Casey Marshall
+ */
+public abstract class KeyPairGenerator extends KeyPairGeneratorSpi
+{
+  /** The service name for key pair generators. */
+  private static final String KEY_PAIR_GENERATOR = "KeyPairGenerator";
+
+  Provider provider;
+  private String algorithm;
+
+  /**
+   * Constructs a new instance of <code>KeyPairGenerator</code>.
+   *
+   * @param algorithm
+   *          the algorithm to use.
+   */
+  protected KeyPairGenerator(String algorithm)
+  {
+    this.algorithm = algorithm;
+    this.provider = null;
+  }
+
+  /**
+   * Returns the name of the algorithm used.
+   *
+   * @return the name of the algorithm used.
+   */
+  public String getAlgorithm()
+  {
+    return algorithm;
+  }
+
+  /**
+   * Returns a new instance of <code>KeyPairGenerator</code> which generates
+   * key-pairs for the specified algorithm.
+   *
+   * @param algorithm the name of the algorithm to use.
+   * @return a new instance repesenting the desired algorithm.
+   * @throws NoSuchAlgorithmException if the algorithm is not implemented by any
+   *           provider.
+   * @throws IllegalArgumentException if <code>algorithm</code> is
+   *           <code>null</code> or is an empty string.
+   */
+  public static KeyPairGenerator getInstance(String algorithm)
+      throws NoSuchAlgorithmException
+  {
+    Provider[] p = Security.getProviders();
+    NoSuchAlgorithmException lastException = null;
+    for (int i = 0; i < p.length; i++)
+      try
+        {
+          return getInstance(algorithm, p[i]);
+        }
+      catch (NoSuchAlgorithmException x)
+        {
+          lastException = x;
+        }
+    if (lastException != null)
+      throw lastException;
+    throw new NoSuchAlgorithmException(algorithm);
+  }
+
+  /**
+   * Returns a new instance of <code>KeyPairGenerator</code> which generates
+   * key-pairs for the specified algorithm from a named provider.
+   *
+   * @param algorithm the name of the algorithm to use.
+   * @param provider the name of a {@link Provider} to use.
+   * @return a new instance repesenting the desired algorithm.
+   * @throws NoSuchAlgorithmException if the algorithm is not implemented by the
+   *           named provider.
+   * @throws NoSuchProviderException if the named provider was not found.
+   * @throws IllegalArgumentException if either <code>algorithm</code> or
+   *           <code>provider</code> is <code>null</code> or empty.
+   */
+  public static KeyPairGenerator getInstance(String algorithm, String provider)
+      throws NoSuchAlgorithmException, NoSuchProviderException
+  {
+    if (provider == null)
+      throw new IllegalArgumentException("provider MUST NOT be null");
+    provider = provider.trim();
+    if (provider.length() == 0)
+      throw new IllegalArgumentException("provider MUST NOT be empty");
+    Provider p = Security.getProvider(provider);
+    if (p == null)
+      throw new NoSuchProviderException(provider);
+    return getInstance(algorithm, p);
+  }
+
+  /**
+   * Returns a new instance of <code>KeyPairGenerator</code> which generates
+   * key-pairs for the specified algorithm from a designated {@link Provider}.
+   *
+   * @param algorithm
+   *          the name of the algorithm to use.
+   * @param provider
+   *          the {@link Provider} to use.
+   * @return a new insatnce repesenting the desired algorithm.
+   * @throws NoSuchAlgorithmException
+   *           if the algorithm is not implemented by the {@link Provider}.
+   * @throws IllegalArgumentException if either <code>algorithm</code> or
+   *           <code>provider</code> is <code>null</code>, or if
+   *           <code>algorithm</code> is an empty string.
+   * @since 1.4
+   * @see Provider
+   */
+  public static KeyPairGenerator getInstance(String algorithm,
+                                             Provider provider)
+    throws NoSuchAlgorithmException
+  {
+    CPStringBuilder sb = new CPStringBuilder("KeyPairGenerator for algorithm [")
+        .append(algorithm).append("] from provider[")
+        .append(provider).append("] ");
+    Object o;
+    try
+      {
+        o = Engine.getInstance(KEY_PAIR_GENERATOR, algorithm, provider);
+      }
+    catch (InvocationTargetException x)
+      {
+        Throwable cause = x.getCause();
+        if (cause instanceof NoSuchAlgorithmException)
+          throw (NoSuchAlgorithmException) cause;
+        if (cause == null)
+          cause = x;
+        sb.append("could not be created");
+        NoSuchAlgorithmException y = new NoSuchAlgorithmException(sb.toString());
+        y.initCause(cause);
+        throw y;
+      }
+    KeyPairGenerator result;
+    if (o instanceof KeyPairGenerator)
+      {
+        result = (KeyPairGenerator) o;
+        result.algorithm = algorithm;
+      }
+    else if (o instanceof KeyPairGeneratorSpi)
+      result = new DummyKeyPairGenerator((KeyPairGeneratorSpi) o, algorithm);
+    else
+      {
+        sb.append("is of an unexpected Type: ").append(o.getClass().getName());
+        throw new NoSuchAlgorithmException(sb.toString());
+      }
+    result.provider = provider;
+    return result;
+  }
+
+  /**
+   * Returns the {@link Provider} of this instance.
+   *
+   * @return the {@link Provider} of this instance.
+   */
+  public final Provider getProvider()
+  {
+    return provider;
+  }
+
+  /**
+   * Initializes this instance for the specified key size. Since no source of
+   * randomness is specified, a default one will be used.
+   *
+   * @param keysize
+   *          the size of keys to use.
+   */
+  public void initialize(int keysize)
+  {
+    initialize(keysize, new SecureRandom());
+  }
+
+  /**
+   * Initializes this instance for the specified key size and
+   * {@link SecureRandom}.
+   *
+   * @param keysize
+   *          the size of keys to use.
+   * @param random
+   *          the {@link SecureRandom} to use.
+   * @since 1.2
+   */
+  public void initialize(int keysize, SecureRandom random)
+  {
+  }
+
+  /**
+   * Initializes this instance with the specified
+   * {@link AlgorithmParameterSpec}. Since no source of randomness is specified,
+   * a default one will be used.
+   *
+   * @param params
+   *          the {@link AlgorithmParameterSpec} to use.
+   * @throws InvalidAlgorithmParameterException
+   *           if the designated specifications are invalid.
+   * @since 1.2
+   */
+  public void initialize(AlgorithmParameterSpec params)
+    throws InvalidAlgorithmParameterException
+  {
+    initialize(params, new SecureRandom());
+  }
+
+  /**
+   * Initializes this instance with the specified {@link AlgorithmParameterSpec}
+   * and {@link SecureRandom}.
+   *
+   * @param params
+   *          the {@link AlgorithmParameterSpec} to use.
+   * @param random
+   *          the {@link SecureRandom} to use.
+   * @throws InvalidAlgorithmParameterException
+   *           if the designated specifications are invalid.
+   * @since 1.2
+   */
+  public void initialize(AlgorithmParameterSpec params, SecureRandom random)
+    throws InvalidAlgorithmParameterException
+  {
+    super.initialize(params, random);
+  }
+
+  /**
+   * Generates a new "DSA" {@link KeyPair} from the "GNU" security provider.
+   *
+   * <p>This method generates a unique key-pair each time it is called.</p>
+   *
+   * @return a new unique {@link KeyPair}.
+   * @see #generateKeyPair()
+   * @since 1.2
+   */
+  public final KeyPair genKeyPair()
+  {
+    try
+      {
+        return getInstance("DSA", "GNU").generateKeyPair();
+      }
+    catch (Exception e)
+      {
+        System.err.println("genKeyPair failed: " + e);
+        e.printStackTrace();
+        return null;
+      }
+  }
+
+  /**
+   * Generates a new "DSA" {@link KeyPair} from the "GNU" security provider.
+   *
+   * <p>This method generates a unique key pair each time it is called.</p>
+   *
+   * @return a new unique {@link KeyPair}.
+   * @see #genKeyPair()
+   */
+  public KeyPair generateKeyPair()
+  {
+    return genKeyPair();
+  }
+}