/* * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.security.ec; import java.io.IOException; import java.security.*;import java.security.interfaces.*;import java.security.spec.*; import sun.security.util.*;import sun.security.x509.*; /** * Key implementation for EC public keys. * * @since   1.6 * @author  Andreas Sterbenz */public final class ECPublicKeyImpl extends X509Key implements ECPublicKey {     private static final long serialVersionUID = -2462037275160462289L;     private ECPoint w;    private ECParameterSpec params;     /**     * Construct a key from its components. Used by the     * ECKeyFactory and SunPKCS11.     */    public ECPublicKeyImpl(ECPoint w, ECParameterSpec params)            throws InvalidKeyException {        this.w = w;        this.params = params;        // generate the encoding        algid = new AlgorithmId            (AlgorithmId.EC_oid, ECParameters.getAlgorithmParameters(params));        key = ECParameters.encodePoint(w, params.getCurve());    }     /**     * Construct a key from its encoding. Used by RSAKeyFactory.     */    public ECPublicKeyImpl(byte[] encoded) throws InvalidKeyException {        decode(encoded);    }     // see JCA doc    public String getAlgorithm() {        return "EC";    }     // see JCA doc    public ECPoint getW() {        return w;    }     // see JCA doc    public ECParameterSpec getParams() {        return params;    }     // Internal API to get the encoded point. Currently used by SunPKCS11.    // This may change/go away depending on what we do with the public API.    public byte[] getEncodedPublicValue() {        return key.clone();    }     /**     * Parse the key. Called by X509Key.     */    protected void parseKeyBits() throws InvalidKeyException {        try {            AlgorithmParameters algParams = this.algid.getParameters();            params = algParams.getParameterSpec(ECParameterSpec.class);            w = ECParameters.decodePoint(key, params.getCurve());        } catch (IOException e) {            throw new InvalidKeyException("Invalid EC key", e);        } catch (InvalidParameterSpecException e) {            throw new InvalidKeyException("Invalid EC key", e);        }    }     // return a string representation of this key for debugging    public String toString() {        return "Sun EC public key, " + params.getCurve().getField().getFieldSize()            + " bits\n  public x coord: " + w.getAffineX()            + "\n  public y coord: " + w.getAffineY()            + "\n  parameters: " + params;    }     protected Object writeReplace() throws java.io.ObjectStreamException {        return new KeyRep(KeyRep.Type.PUBLIC,                        getAlgorithm(),                        getFormat(),                        getEncoded());    }}