1 /*

     2  * Copyright (c) 2012, 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 sun.security.util;

    26 

    27 import java.security.spec.AlgorithmParameterSpec;

    28 

    29 import sun.security.util.ObjectIdentifier;

    30 

    31 /**

    32  * This immutable class is used when randomly generating a key pair and the

    33  * consumer only specifies the length of the key and therefore a curve for that

    34  * key size must be picked from a the list of supported curves using this spec.

    35  *

    36  * @see AlgorithmParameterSpec

    37  * @see ECGenParameterSpec

    38  */

    39 public class ECKeySizeParameterSpec implements AlgorithmParameterSpec {

    40 

    41     private int keySize;

    42 

    43     /**

    44      * Creates a parameter specification for EC curve

    45      * generation using a standard (or predefined) key size

    46      * <code>keySize</code> in order to generate the corresponding

    47      * (precomputed) elliptic curve.

    48      * <p>

    49      * Note, if the curve of the specified length is not supported,

    50      * <code>AlgorithmParameters.init</code> will throw an exception.

    51      *

    52      * @param keySize the key size of the curve to lookup

    53      */

    54     public ECKeySizeParameterSpec(int keySize) {

    55         this.keySize = keySize;

    56     }

    57 

    58     /**

    59      * Returns the key size of this spec.

    60      *

    61      * @return the standard or predefined key size.

    62      */

    63     public int getKeySize() {

    64         return keySize;

    65     }

    66 }