1 /*
   2  * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package java.security.spec;
  26 
  27 /**
  28  * This immutable class specifies an elliptic curve public key with
  29  * its associated parameters.
  30  *
  31  * @see KeySpec
  32  * @see ECPoint
  33  * @see ECParameterSpec
  34  *
  35  * @author Valerie Peng
  36  *
  37  * @since 1.5
  38  */
  39 public class ECPublicKeySpec implements KeySpec {
  40 
  41     private ECPoint w;
  42     private ECParameterSpec params;
  43 
  44     /**
  45      * Creates a new ECPublicKeySpec with the specified
  46      * parameter values.
  47      * @param w the public point.
  48      * @param params the associated elliptic curve domain
  49      * parameters.
  50      * @exception NullPointerException if <code>w</code>
  51      * or <code>params</code> is null.
  52      * @exception IllegalArgumentException if <code>w</code>
  53      * is point at infinity, i.e. ECPoint.POINT_INFINITY
  54      */
  55     public ECPublicKeySpec(ECPoint w, ECParameterSpec params) {
  56         if (w == null) {
  57             throw new NullPointerException("w is null");
  58         }
  59         if (params == null) {
  60             throw new NullPointerException("params is null");
  61         }
  62         if (w == ECPoint.POINT_INFINITY) {
  63             throw new IllegalArgumentException("w is ECPoint.POINT_INFINITY");
  64         }
  65         this.w = w;
  66         this.params = params;
  67     }
  68 
  69     /**
  70      * Returns the public point W.
  71      * @return the public point W.
  72      */
  73     public ECPoint getW() {
  74         return w;
  75     }
  76 
  77     /**
  78      * Returns the associated elliptic curve domain
  79      * parameters.
  80      * @return the EC domain parameters.
  81      */
  82     public ECParameterSpec getParams() {
  83         return params;
  84     }
  85 }