1 /*

     2  * Copyright (c) 1999, 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 java.security.spec;

    27 

    28 import java.math.BigInteger;

    29 import java.security.spec.AlgorithmParameterSpec;

    30 

    31 /**

    32  * This class specifies the set of parameters used to generate an RSA

    33  * key pair.

    34  *

    35  * @author Jan Luehe

    36  *

    37  * @see java.security.KeyPairGenerator#initialize(java.security.spec.AlgorithmParameterSpec)

    38  *

    39  * @since 1.3

    40  */

    41 

    42 public class RSAKeyGenParameterSpec implements AlgorithmParameterSpec {

    43 

    44     private int keysize;

    45     private BigInteger publicExponent;

    46 

    47     /**

    48      * The public-exponent value F0 = 3.

    49      */

    50     public static final BigInteger F0 = BigInteger.valueOf(3);

    51 

    52     /**

    53      * The public exponent-value F4 = 65537.

    54      */

    55     public static final BigInteger F4 = BigInteger.valueOf(65537);

    56 

    57     /**

    58      * Constructs a new {@code RSAParameterSpec} object from the

    59      * given keysize and public-exponent value.

    60      *

    61      * @param keysize the modulus size (specified in number of bits)

    62      * @param publicExponent the public exponent

    63      */

    64     public RSAKeyGenParameterSpec(int keysize, BigInteger publicExponent) {

    65         this.keysize = keysize;

    66         this.publicExponent = publicExponent;

    67     }

    68 

    69     /**

    70      * Returns the keysize.

    71      *

    72      * @return the keysize.

    73      */

    74     public int getKeysize() {

    75         return keysize;

    76     }

    77 

    78     /**

    79      * Returns the public-exponent value.

    80      *

    81      * @return the public-exponent value.

    82      */

    83     public BigInteger getPublicExponent() {

    84         return publicExponent;

    85     }

    86 }