obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

8 files changed, 820 insertions, 0 deletions

diff --git a/libjava/classpath/gnu/java/security/prng/BasePRNG.java b/libjava/classpath/gnu/java/security/prng/BasePRNG.java
new file mode 100644
index 000000000..eb5ada71c
--- /dev/null
+++ b/libjava/classpath/gnu/java/security/prng/BasePRNG.java
@@ -0,0 +1,178 @@
+/* BasePRNG.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.java.security.prng;
+
+import java.util.Map;
+
+/**
+ * An abstract class to facilitate implementing PRNG algorithms.
+ */
+public abstract class BasePRNG
+    implements IRandom
+{
+  /** The canonical name prefix of the PRNG algorithm. */
+  protected String name;
+
+  /** Indicate if this instance has already been initialised or not. */
+  protected boolean initialised;
+
+  /** A temporary buffer to serve random bytes. */
+  protected byte[] buffer;
+
+  /** The index into buffer of where the next byte will come from. */
+  protected int ndx;
+
+  /**
+   * Trivial constructor for use by concrete subclasses.
+   *
+   * @param name the canonical name of this instance.
+   */
+  protected BasePRNG(String name)
+  {
+    super();
+
+    this.name = name;
+    initialised = false;
+    buffer = new byte[0];
+  }
+
+  public String name()
+  {
+    return name;
+  }
+
+  public void init(Map attributes)
+  {
+    this.setup(attributes);
+
+    ndx = 0;
+    initialised = true;
+  }
+
+  public byte nextByte() throws IllegalStateException, LimitReachedException
+  {
+    if (! initialised)
+      throw new IllegalStateException();
+
+    return nextByteInternal();
+  }
+
+  public void nextBytes(byte[] out) throws IllegalStateException,
+      LimitReachedException
+  {
+    nextBytes(out, 0, out.length);
+  }
+
+  public void nextBytes(byte[] out, int offset, int length)
+      throws IllegalStateException, LimitReachedException
+  {
+    if (! initialised)
+      throw new IllegalStateException("not initialized");
+
+    if (length == 0)
+      return;
+
+    if (offset < 0 || length < 0 || offset + length > out.length)
+      throw new ArrayIndexOutOfBoundsException("offset=" + offset + " length="
+                                               + length + " limit="
+                                               + out.length);
+    if (ndx >= buffer.length)
+      {
+        fillBlock();
+        ndx = 0;
+      }
+    int count = 0;
+    while (count < length)
+      {
+        int amount = Math.min(buffer.length - ndx, length - count);
+        System.arraycopy(buffer, ndx, out, offset + count, amount);
+        count += amount;
+        ndx += amount;
+        if (ndx >= buffer.length)
+          {
+            fillBlock();
+            ndx = 0;
+          }
+      }
+  }
+
+  public void addRandomByte(byte b)
+  {
+    throw new UnsupportedOperationException("random state is non-modifiable");
+  }
+
+  public void addRandomBytes(byte[] buffer)
+  {
+    addRandomBytes(buffer, 0, buffer.length);
+  }
+
+  public void addRandomBytes(byte[] buffer, int offset, int length)
+  {
+    throw new UnsupportedOperationException("random state is non-modifiable");
+  }
+
+  public boolean isInitialised()
+  {
+    return initialised;
+  }
+
+  private byte nextByteInternal() throws LimitReachedException
+  {
+    if (ndx >= buffer.length)
+      {
+        this.fillBlock();
+        ndx = 0;
+      }
+
+    return buffer[ndx++];
+  }
+
+  public Object clone() throws CloneNotSupportedException
+  {
+    BasePRNG result = (BasePRNG) super.clone();
+    if (this.buffer != null)
+      result.buffer = (byte[]) this.buffer.clone();
+
+    return result;
+  }
+
+  public abstract void setup(Map attributes);
+
+  public abstract void fillBlock() throws LimitReachedException;
+}
diff --git a/libjava/classpath/gnu/java/security/prng/EntropySource.java b/libjava/classpath/gnu/java/security/prng/EntropySource.java
new file mode 100644
index 000000000..a7173d3b1
--- /dev/null
+++ b/libjava/classpath/gnu/java/security/prng/EntropySource.java
@@ -0,0 +1,61 @@
+/* EntropySource.java --
+   Copyright (C) 2004, 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.java.security.prng;
+
+/**
+ * A generic interface for adding random bytes to an entropy pool.
+ */
+public interface EntropySource
+{
+  /**
+   * Returns the estimated quality of this source. This value should be
+   * between 0 and 100 (the running quality is computed as a percentage,
+   * 100 percent being perfect-quality).
+   *
+   * @return The quality.
+   */
+  double quality();
+
+  /**
+   * Returns a new buffer with the next random bytes to add.
+   *
+   * @return The next random bytes.
+   */
+  byte[] nextBytes();
+}
diff --git a/libjava/classpath/gnu/java/security/prng/IRandom.java b/libjava/classpath/gnu/java/security/prng/IRandom.java
new file mode 100644
index 000000000..eb1495dd8
--- /dev/null
+++ b/libjava/classpath/gnu/java/security/prng/IRandom.java
@@ -0,0 +1,174 @@
+/* IRandom.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.java.security.prng;
+
+import java.util.Map;
+
+/**
+ * The basic visible methods of any pseudo-random number generator.
+ * <p>
+ * The [HAC] defines a PRNG (as implemented in this library) as follows:
+ * <ul>
+ * <li>"5.6 Definition: A pseudorandom bit generator (PRBG) is said to pass the
+ * <em>next-bit test</em> if there is no polynomial-time algorithm which, on
+ * input of the first <code>L</code> bits of an output sequence <code>S</code>,
+ * can predict the <code>(L+1)</code><sup>st</sup> bit of <code>S</code> with a
+ * probability significantly greater than <code>1/2</code>."</li>
+ * <li>"5.8 Definition: A PRBG that passes the <em>next-bit test</em>
+ * (possibly under some plausible but unproved mathematical assumption such as
+ * the intractability of factoring integers) is called a <em>cryptographically
+ * secure pseudorandom bit generator</em> (CSPRBG)."</li>
+ * </ul>
+ * <p>
+ * <b>IMPLEMENTATION NOTE</b>: Although all the concrete classes in this
+ * package implement the {@link Cloneable} interface, it is important to note
+ * here that such an operation, for those algorithms that use an underlying
+ * symmetric key block cipher, <b>DOES NOT</b> clone any session key material
+ * that may have been used in initialising the source PRNG (the instance to be
+ * cloned). Instead a clone of an already initialised PRNG, that uses an
+ * underlying symmetric key block cipher, is another instance with a clone of
+ * the same cipher that operates with the <b>same block size</b> but without
+ * any knowledge of neither key material nor key size.
+ * <p>
+ * References:
+ * <ol>
+ * <li><a href="http://www.cacr.math.uwaterloo.ca/hac">[HAC]</a>: Handbook of
+ * Applied Cryptography.<br>
+ * CRC Press, Inc. ISBN 0-8493-8523-7, 1997<br>
+ * Menezes, A., van Oorschot, P. and S. Vanstone.</li>
+ * </ol>
+ */
+public interface IRandom
+    extends Cloneable
+{
+  /**
+   * Returns the canonical name of this instance.
+   *
+   * @return the canonical name of this instance.
+   */
+  String name();
+
+  /**
+   * Initialises the pseudo-random number generator scheme with the appropriate
+   * attributes.
+   *
+   * @param attributes a set of name-value pairs that describe the desired
+   *          future instance behaviour.
+   * @exception IllegalArgumentException if at least one of the defined name/
+   *              value pairs contains invalid data.
+   */
+  void init(Map attributes);
+
+  /**
+   * Returns the next 8 bits of random data generated from this instance.
+   *
+   * @return the next 8 bits of random data generated from this instance.
+   * @exception IllegalStateException if the instance is not yet initialised.
+   * @exception LimitReachedException if this instance has reached its
+   *              theoretical limit for generating non-repetitive pseudo-random
+   *              data.
+   */
+  byte nextByte() throws IllegalStateException, LimitReachedException;
+
+  /**
+   * Fills the designated byte array, starting from byte at index
+   * <code>offset</code>, for a maximum of <code>length</code> bytes with
+   * the output of this generator instance.
+   *
+   * @param out the placeholder to contain the generated random bytes.
+   * @param offset the starting index in <i>out</i> to consider. This method
+   *          does nothing if this parameter is not within <code>0</code> and
+   *          <code>out.length</code>.
+   * @param length the maximum number of required random bytes. This method does
+   *          nothing if this parameter is less than <code>1</code>.
+   * @exception IllegalStateException if the instance is not yet initialised.
+   * @exception LimitReachedException if this instance has reached its
+   *              theoretical limit for generating non-repetitive pseudo-random
+   *              data.
+   */
+  void nextBytes(byte[] out, int offset, int length)
+      throws IllegalStateException, LimitReachedException;
+
+  /**
+   * Supplement, or possibly replace, the random state of this PRNG with a
+   * random byte.
+   * <p>
+   * Implementations are not required to implement this method in any meaningful
+   * way; this may be a no-operation, and implementations may throw an
+   * {@link UnsupportedOperationException}.
+   *
+   * @param b The byte to add.
+   */
+  void addRandomByte(byte b);
+
+  /**
+   * Supplement, or possibly replace, the random state of this PRNG with a
+   * sequence of new random bytes.
+   * <p>
+   * Implementations are not required to implement this method in any meaningful
+   * way; this may be a no-operation, and implementations may throw an
+   * {@link UnsupportedOperationException}.
+   *
+   * @param in The buffer of new random bytes to add.
+   */
+  void addRandomBytes(byte[] in);
+
+  /**
+   * Supplement, or possibly replace, the random state of this PRNG with a
+   * sequence of new random bytes.
+   * <p>
+   * Implementations are not required to implement this method in any meaningful
+   * way; this may be a no-operation, and implementations may throw an
+   * {@link UnsupportedOperationException}.
+   *
+   * @param in The buffer of new random bytes to add.
+   * @param offset The offset from whence to begin reading random bytes.
+   * @param length The number of random bytes to add.
+   * @exception IndexOutOfBoundsException If <i>offset</i>, <i>length</i>, or
+   *              <i>offset</i>+<i>length</i> is out of bounds.
+   */
+  void addRandomBytes(byte[] in, int offset, int length);
+
+  /**
+   * Returns a clone copy of this instance.
+   *
+   * @return a clone copy of this instance.
+   */
+  Object clone() throws CloneNotSupportedException;
+}
diff --git a/libjava/classpath/gnu/java/security/prng/LimitReachedException.java b/libjava/classpath/gnu/java/security/prng/LimitReachedException.java
new file mode 100644
index 000000000..028c74553
--- /dev/null
+++ b/libjava/classpath/gnu/java/security/prng/LimitReachedException.java
@@ -0,0 +1,57 @@
+/* LimitReachedException.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.java.security.prng;
+
+/**
+ * A checked exception that indicates that a pseudo random number generated has
+ * reached its theoretical limit in generating random bytes.
+ */
+public class LimitReachedException
+    extends Exception
+{
+  public LimitReachedException()
+  {
+    super();
+  }
+
+  public LimitReachedException(String msg)
+  {
+    super(msg);
+  }
+}
diff --git a/libjava/classpath/gnu/java/security/prng/MDGenerator.java b/libjava/classpath/gnu/java/security/prng/MDGenerator.java
new file mode 100644
index 000000000..b110486f4
--- /dev/null
+++ b/libjava/classpath/gnu/java/security/prng/MDGenerator.java
@@ -0,0 +1,127 @@
+/* MDGenerator.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.java.security.prng;
+
+import gnu.java.security.Registry;
+import gnu.java.security.hash.HashFactory;
+import gnu.java.security.hash.IMessageDigest;
+
+import java.util.Map;
+
+/**
+ * A simple pseudo-random number generator that relies on a hash algorithm, that
+ * (a) starts its operation by hashing a <code>seed</code>, and then (b)
+ * continuously re-hashing its output. If no hash algorithm name is specified in
+ * the {@link Map} of attributes used to initialise the instance then the
+ * SHA-160 algorithm is used as the underlying hash function. Also, if no
+ * <code>seed</code> is given, an empty octet sequence is used.
+ */
+public class MDGenerator
+    extends BasePRNG
+    implements Cloneable
+{
+  /** Property name of underlying hash algorithm for this generator. */
+  public static final String MD_NAME = "gnu.crypto.prng.md.hash.name";
+
+  /** Property name of seed material. */
+  public static final String SEEED = "gnu.crypto.prng.md.seed";
+
+  /** The underlying hash instance. */
+  private IMessageDigest md;
+
+  /** Trivial 0-arguments constructor. */
+  public MDGenerator()
+  {
+    super(Registry.MD_PRNG);
+  }
+
+  public void setup(Map attributes)
+  {
+    // find out which hash to use
+    String underlyingMD = (String) attributes.get(MD_NAME);
+    if (underlyingMD == null)
+      {
+        if (md == null)
+          { // happy birthday
+            // ensure we have a reliable implementation of this hash
+            md = HashFactory.getInstance(Registry.SHA160_HASH);
+          }
+        else // a clone. reset it for reuse
+          md.reset();
+      }
+    else // ensure we have a reliable implementation of this hash
+      md = HashFactory.getInstance(underlyingMD);
+    // get the seeed
+    byte[] seed = (byte[]) attributes.get(SEEED);
+    if (seed == null)
+      seed = new byte[0];
+
+    md.update(seed, 0, seed.length);
+  }
+
+  public void fillBlock() throws LimitReachedException
+  {
+    IMessageDigest mdc = (IMessageDigest) md.clone();
+    buffer = mdc.digest();
+    md.update(buffer, 0, buffer.length);
+  }
+
+  public void addRandomByte(final byte b)
+  {
+    if (md == null)
+      throw new IllegalStateException("not initialized");
+    md.update(b);
+  }
+
+  public void addRandomBytes(final byte[] buf, final int off, final int len)
+  {
+    if (md == null)
+      throw new IllegalStateException("not initialized");
+    md.update(buf, off, len);
+  }
+
+  public Object clone() throws CloneNotSupportedException
+  {
+    MDGenerator result = (MDGenerator) super.clone();
+    if (this.md != null)
+      result.md = (IMessageDigest) this.md.clone();
+
+    return result;
+  }
+}
diff --git a/libjava/classpath/gnu/java/security/prng/PRNGFactory.java b/libjava/classpath/gnu/java/security/prng/PRNGFactory.java
new file mode 100644
index 000000000..b57d7c7bb
--- /dev/null
+++ b/libjava/classpath/gnu/java/security/prng/PRNGFactory.java
@@ -0,0 +1,92 @@
+/* PRNGFactory.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.java.security.prng;
+
+import gnu.java.security.Registry;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * A Factory to instantiate pseudo random number generators.
+ */
+public class PRNGFactory
+    implements Registry
+{
+  /** Trivial constructor to enforce <i>Singleton</i> pattern. */
+  protected PRNGFactory()
+  {
+  }
+
+  /**
+   * Returns an instance of a padding algorithm given its name.
+   *
+   * @param prng the case-insensitive name of the PRNG.
+   * @return an instance of the pseudo-random number generator.
+   * @exception InternalError if the implementation does not pass its self-
+   *              test.
+   */
+  public static final IRandom getInstance(String prng)
+  {
+    if (prng == null)
+      return null;
+
+    prng = prng.trim();
+    IRandom result = null;
+    if (prng.equalsIgnoreCase(MD_PRNG))
+      result = new MDGenerator();
+
+    return result;
+  }
+
+  /**
+   * Returns a {@link Set} of names of padding algorithms supported by this
+   * <i>Factory</i>.
+   *
+   * @return a {@link Set} of pseudo-random number generator algorithm names
+   *         (Strings).
+   */
+  public static final Set getNames()
+  {
+    HashSet hs = new HashSet();
+    hs.add(MD_PRNG);
+    return Collections.unmodifiableSet(hs);
+  }
+}
diff --git a/libjava/classpath/gnu/java/security/prng/RandomEvent.java b/libjava/classpath/gnu/java/security/prng/RandomEvent.java
new file mode 100644
index 000000000..fc4607a8a
--- /dev/null
+++ b/libjava/classpath/gnu/java/security/prng/RandomEvent.java
@@ -0,0 +1,81 @@
+/* RandomEvent.java -- an event with random data.
+   Copyright (C) 2004, 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.java.security.prng;
+
+import java.util.EventObject;
+
+/**
+ * A type for entropy accumulators that will be notified of random events.
+ */
+public class RandomEvent
+    extends EventObject
+{
+  private final byte sourceNumber;
+
+  private final byte poolNumber;
+
+  private final byte[] data;
+
+  public RandomEvent(Object source, byte sourceNumber, byte poolNumber,
+                     byte[] data)
+  {
+    super(source);
+    this.sourceNumber = sourceNumber;
+    this.poolNumber = poolNumber;
+    if (data.length == 0 || data.length > 32)
+      throw new IllegalArgumentException(
+          "random events take between 1 and 32 bytes of data");
+    this.data = (byte[]) data.clone();
+  }
+
+  public byte getSourceNumber()
+  {
+    return sourceNumber;
+  }
+
+  public byte getPoolNumber()
+  {
+    return poolNumber;
+  }
+
+  public byte[] getData()
+  {
+    return data;
+  }
+}
diff --git a/libjava/classpath/gnu/java/security/prng/RandomEventListener.java b/libjava/classpath/gnu/java/security/prng/RandomEventListener.java
new file mode 100644
index 000000000..720f2afe4
--- /dev/null
+++ b/libjava/classpath/gnu/java/security/prng/RandomEventListener.java
@@ -0,0 +1,50 @@
+/* RandomEventListener.java --
+   Copyright (C) 2004, 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.java.security.prng;
+
+import java.util.EventListener;
+
+/**
+ * An interface for entropy accumulators that will be notified of random events.
+ */
+public interface RandomEventListener
+    extends EventListener
+{
+  void addRandomEvent(RandomEvent event);
+}