1 /* 2 * Copyright (c) 1999, 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</code> 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 */ RSAKeyGenParameterSpec(int keysize, BigInteger publicExponent)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 */ getKeysize()74 public int getKeysize() { 75 return keysize; 76 } 77 78 /** 79 * Returns the public-exponent value. 80 * 81 * @return the public-exponent value. 82 */ getPublicExponent()83 public BigInteger getPublicExponent() { 84 return publicExponent; 85 } 86 } 87