1 /*

     2  * Copyright (c) 2006, 2013, 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 

    26 package sun.security.ec;

    27 

    28 import java.io.IOException;

    29 import java.math.BigInteger;

    30 

    31 import java.security.spec.*;

    32 

    33 import sun.security.util.DerOutputStream;

    34 import sun.security.util.ObjectIdentifier;

    35 

    36 

    37 /**

    38  * Contains Elliptic Curve parameters.

    39  *

    40  * @since   1.6

    41  * @author  Andreas Sterbenz

    42  */

    43 class NamedCurve extends ECParameterSpec {

    44 

    45     // friendly name for toString() output

    46     private final String name;

    47 

    48     // well known OID

    49     private final String oid;

    50 

    51     // encoded form (as NamedCurve identified via OID)

    52     private final byte[] encoded;

    53 

    54     NamedCurve(String name, String oid, EllipticCurve curve,

    55             ECPoint g, BigInteger n, int h) {

    56         super(curve, g, n, h);

    57         this.name = name;

    58         this.oid = oid;

    59 

    60         DerOutputStream out = new DerOutputStream();

    61 

    62         try {

    63             out.putOID(new ObjectIdentifier(oid));

    64         } catch (IOException e) {

    65             throw new RuntimeException("Internal error", e);

    66         }

    67 

    68         encoded = out.toByteArray();

    69     }

    70 

    71     String getName() {

    72         return name;

    73     }

    74 

    75     byte[] getEncoded() {

    76         return encoded.clone();

    77     }

    78 

    79     String getObjectId() {

    80         return oid;

    81     }

    82 

    83     public String toString() {

    84         return name + " (" + oid + ")";

    85     }

    86 }