01 /*
02 * Copyright 1999 Sun Microsystems, Inc. All Rights Reserved.
03 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04 *
05 * This code is free software; you can redistribute it and/or modify it
06 * under the terms of the GNU General Public License version 2 only, as
07 * published by the Free Software Foundation. Sun designates this
08 * particular file as subject to the "Classpath" exception as provided
09 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any 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 * @version 1.15 05/05/07
37 *
38 * @see java.security.KeyPairGenerator#initialize(java.security.spec.AlgorithmParameterSpec)
39 *
40 * @since 1.3
41 */
42
43 public class RSAKeyGenParameterSpec implements AlgorithmParameterSpec {
44
45 private int keysize;
46 private BigInteger publicExponent;
47
48 /**
49 * The public-exponent value F0 = 3.
50 */
51 public static final BigInteger F0 = BigInteger.valueOf(3);
52
53 /**
54 * The public exponent-value F4 = 65537.
55 */
56 public static final BigInteger F4 = BigInteger.valueOf(65537);
57
58 /**
59 * Constructs a new <code>RSAParameterSpec</code> object from the
60 * given keysize and public-exponent value.
61 *
62 * @param keysize the modulus size (specified in number of bits)
63 * @param publicExponent the public exponent
64 */
65 public RSAKeyGenParameterSpec(int keysize, BigInteger publicExponent) {
66 this .keysize = keysize;
67 this .publicExponent = publicExponent;
68 }
69
70 /**
71 * Returns the keysize.
72 *
73 * @return the keysize.
74 */
75 public int getKeysize() {
76 return keysize;
77 }
78
79 /**
80 * Returns the public-exponent value.
81 *
82 * @return the public-exponent value.
83 */
84 public BigInteger getPublicExponent() {
85 return publicExponent;
86 }
87 }
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