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diff --git a/libjava/classpath/gnu/javax/net/ssl/provider/TLSRandom.java b/libjava/classpath/gnu/javax/net/ssl/provider/TLSRandom.java
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+++ b/libjava/classpath/gnu/javax/net/ssl/provider/TLSRandom.java
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+/* TLSRandom.java -- The TLS pseudo-random function.
+   Copyright (C) 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.net.ssl.provider;
+
+import java.security.InvalidKeyException;
+import java.util.HashMap;
+import java.util.Map;
+
+import gnu.java.security.hash.HashFactory;
+import gnu.javax.crypto.mac.IMac;
+import gnu.java.security.prng.IRandom;
+
+class TLSRandom implements IRandom
+{
+
+  // Fields.
+  // -------------------------------------------------------------------------
+
+  /**
+   * Property name for the secret that will be used to initialize the HMACs.
+   */
+  static final String SECRET = "jessie.tls.prng.secret";
+
+  /**
+   * Property name for the seed.
+   */
+  static final String SEED = "jessie.tls.prng.seed";
+
+  private final IMac hmac_sha, hmac_md5;
+  private byte[] sha_a, md5_a;
+  private byte[] seed;
+  private final byte[] buffer;
+  private int idx;
+  private boolean init;
+
+  // Constructors.
+  // -------------------------------------------------------------------------
+
+  TLSRandom()
+  {
+    hmac_sha = new TLSHMac(HashFactory.getInstance("SHA1"));
+    hmac_md5 = new TLSHMac(HashFactory.getInstance("MD5"));
+    buffer = new byte[80];   // 80 == LCM of 16 and 20.
+    idx = 0;
+    init = false;
+  }
+
+  // Instance methods.
+  // -------------------------------------------------------------------------
+
+  public Object clone()
+  {
+    try
+      {
+        return super.clone();
+      }
+    catch (CloneNotSupportedException shouldNotHappen)
+      {
+        throw new Error();
+      }
+  }
+
+  public void init(Map attributes)
+  {
+    HashMap sha_attr = new HashMap();
+    HashMap md5_attr = new HashMap();
+    byte[] secret = (byte[]) attributes.get(SECRET);
+    if (secret != null)
+      {
+        int l = (secret.length >>> 1) + (secret.length & 1);
+        byte[] s1 = Util.trim(secret, 0, l);
+        byte[] s2 = Util.trim(secret, secret.length - l, l);
+        md5_attr.put(IMac.MAC_KEY_MATERIAL, s1);
+        sha_attr.put(IMac.MAC_KEY_MATERIAL, s2);
+        try
+          {
+            hmac_md5.init(md5_attr);
+            hmac_sha.init(sha_attr);
+          }
+        catch (InvalidKeyException ike)
+          {
+            throw new Error(ike.toString());
+          }
+      }
+    else if (!init)
+      {
+        throw new IllegalArgumentException("no secret supplied");
+      }
+    // else re-use
+
+    byte[] seeed = (byte[]) attributes.get(SEED);
+    if (seeed != null)
+      {
+        seed = (byte[]) seeed.clone();
+      }
+    else if (!init)
+      {
+        throw new IllegalArgumentException("no seed supplied");
+      }
+    // else re-use
+
+    // A(0) is the seed, A(1) = HMAC_hash(secret, A(0)).
+    hmac_md5.update(seed, 0, seed.length);
+    md5_a = hmac_md5.digest();
+    hmac_md5.reset();
+    hmac_sha.update(seed, 0, seed.length);
+    sha_a = hmac_sha.digest();
+    hmac_sha.reset();
+    fillBuffer();
+    init = true;
+  }
+
+  public String name()
+  {
+    return "TLSRandom";
+  }
+
+  public byte nextByte()
+  {
+    if (!init)
+      throw new IllegalStateException();
+    if (idx >= buffer.length)
+      fillBuffer();
+    return buffer[idx++];
+  }
+
+  public void nextBytes(byte[] buf, int off, int len)
+  {
+    if (!init)
+      throw new IllegalStateException();
+    if (buf == null)
+      throw new NullPointerException();
+    if (off < 0 || off > buf.length || off + len > buf.length)
+      throw new ArrayIndexOutOfBoundsException();
+    int count = 0;
+    if (idx >= buffer.length)
+      fillBuffer();
+    while (count < len)
+      {
+        int l = Math.min(buffer.length-idx, len-count);
+        System.arraycopy(buffer, idx, buf, off+count, l);
+        idx += l;
+        count += l;
+        if (count < len && idx >= buffer.length)
+          fillBuffer();
+      }
+  }
+
+  // For future versions of GNU Crypto. No-ops.
+  public void addRandomByte (byte b)
+  {
+  }
+
+  public void addRandomBytes(byte[] buffer) {
+    addRandomBytes(buffer, 0, buffer.length);
+  }
+
+  public void addRandomBytes (byte[] b, int i, int j)
+  {
+  }
+
+  // Own methods.
+  // -------------------------------------------------------------------------
+
+  /*
+   * The PRF is defined as:
+   *
+   *   PRF(secret, label, seed) = P_MD5(S1, label + seed) XOR
+   *                              P_SHA-1(S2, label + seed);
+   *
+   * P_hash is defined as:
+   *
+   *   P_hash(secret, seed) = HMAC_hash(secret, A(1) + seed) +
+   *                          HMAC_hash(secret, A(2) + seed) +
+   *                          HMAC_hash(secret, A(3) + seed) + ...
+   *
+   * And A() is defined as:
+   *
+   *   A(0) = seed
+   *   A(i) = HMAC_hash(secret, A(i-1))
+   *
+   * For simplicity, we compute an 80-byte block on each call, which
+   * corresponds to five iterations of MD5, and four of SHA-1.
+   */
+  private synchronized void fillBuffer()
+  {
+    int len = hmac_md5.macSize();
+    for (int i = 0; i < buffer.length; i += len)
+      {
+        hmac_md5.update(md5_a, 0, md5_a.length);
+        hmac_md5.update(seed, 0, seed.length);
+        byte[] b = hmac_md5.digest();
+        hmac_md5.reset();
+        System.arraycopy(b, 0, buffer, i, len);
+        hmac_md5.update(md5_a, 0, md5_a.length);
+        md5_a = hmac_md5.digest();
+        hmac_md5.reset();
+      }
+    len = hmac_sha.macSize();
+    for (int i = 0; i < buffer.length; i += len)
+      {
+        hmac_sha.update(sha_a, 0, sha_a.length);
+        hmac_sha.update(seed, 0, seed.length);
+        byte[] b = hmac_sha.digest();
+        hmac_sha.reset();
+        for (int j = 0; j < len; j++)
+          {
+            buffer[j + i] ^= b[j];
+          }
+        hmac_sha.update(sha_a, 0, sha_a.length);
+        sha_a = hmac_sha.digest();
+        hmac_sha.reset();
+      }
+    idx = 0;
+  }
+}