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diff --git a/javax/security/sasl/SaslException.java b/javax/security/sasl/SaslException.java
new file mode 100644
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+++ b/javax/security/sasl/SaslException.java
@@ -0,0 +1,185 @@
+/* SaslException.java
+   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 javax.security.sasl;
+
+import java.io.IOException;
+import java.io.PrintStream;
+import java.io.PrintWriter;
+import java.io.Serializable;
+
+/**
+ * This class represents an error that has occurred when using SASL.
+ *
+ * @version $Revision: 1.1 $
+ */
+public class SaslException extends IOException implements Serializable
+{
+
+  // Constants and variables
+  // -------------------------------------------------------------------------
+
+  /**
+   * @serial The possibly null root cause exception.
+   */
+  private Throwable _exception = null;
+
+  // Constructor(s)
+  // -------------------------------------------------------------------------
+
+  /**
+   * Constructs a new instance of <code>SaslException</code>. The root
+   * exception and the detailed message are null.
+   */
+  public SaslException()
+  {
+    super();
+  }
+
+  /**
+   * Constructs a new instance of <code>SaslException</code> with a detailed
+   * message. The <code>root</code> exception is <code>null</code>.
+   *
+   * @param detail a possibly null string containing details of the exception.
+   * @see Throwable#getMessage()
+   */
+  public SaslException(String detail)
+  {
+    super(detail);
+  }
+
+  /**
+   * Constructs a new instance of <code>SaslException</code> with a detailed
+   * message and a root exception. For example, a <code>SaslException</code>
+   * might result from a problem with the callback handler, which might throw a
+   * {@link javax.security.auth.callback.UnsupportedCallbackException} if it
+   * does not support the requested callback, or throw an {@link IOException}
+   * if it had problems obtaining data for the callback. The
+   * <code>SaslException</code>'s root exception would be then be the exception
+   * thrown by the callback handler.
+   *
+   * @param detail a possibly <code>null</code> string containing details of
+   * the exception.
+   * @param ex a possibly <code>null</code> root exception that caused this
+   * exception.
+   * @see Throwable#getMessage()
+   * @see #getCause()
+   */
+  public SaslException(String detail, Throwable ex)
+  {
+    super(detail);
+    _exception = ex;
+  }
+
+  // Class methods
+  // -------------------------------------------------------------------------
+
+  // Instance methods
+  // -------------------------------------------------------------------------
+
+  /**
+   * Returns the cause of this throwable or <code>null</code> if the cause is
+   * nonexistent or unknown. The cause is the throwable that caused this
+   * exception to be thrown.
+   *
+   * @return the possibly <code>null</code> exception that caused this exception.
+   */
+  public Throwable getCause()
+  {
+    return _exception;
+  }
+
+  /**
+   * Prints this exception's stack trace to <code>System.err</code>. If this
+   * exception has a root exception; the stack trace of the root exception is
+   * also printed to <code>System.err</code>.
+   */
+  public void printStackTrace()
+  {
+    super.printStackTrace();
+    if (_exception != null)
+      _exception.printStackTrace();
+  }
+
+  /**
+   * Prints this exception's stack trace to a print stream. If this exception
+   * has a root exception; the stack trace of the root exception is also
+   * printed to the print stream.
+   *
+   * @param ps the non-null print stream to which to print.
+   */
+  public void printStackTrace(PrintStream ps)
+  {
+    super.printStackTrace(ps);
+    if (_exception != null)
+      _exception.printStackTrace(ps);
+  }
+
+  /**
+   * Prints this exception's stack trace to a print writer. If this exception
+   * has a root exception; the stack trace of the root exception is also
+   * printed to the print writer.
+   *
+   * @param pw the non-null print writer to use for output.
+   */
+  public void printStackTrace(PrintWriter pw)
+  {
+    super.printStackTrace(pw);
+    if (_exception != null)
+      _exception.printStackTrace(pw);
+  }
+
+  /**
+   * Returns the string representation of this exception. The string
+   * representation contains this exception's class name, its detailed
+   * messsage, and if it has a root exception, the string representation of the
+   * root exception. This string representation is meant for debugging and not
+   * meant to be interpreted programmatically.
+   *
+   * @return the non-null string representation of this exception.
+   * @see Throwable#getMessage()
+   */
+  public String toString()
+  {
+    StringBuffer sb = new StringBuffer(this.getClass().getName())
+      .append(": ").append(super.toString());
+    if (_exception != null)
+      sb.append("; caused by: ").append(_exception.toString());
+    return sb.toString();
+  }
+}