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
26package java.security.spec;
27
28import java.math.BigInteger;
29import 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
42public 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}
87