| /* |
| * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.crypto.spec; |
| |
| import java.math.BigInteger; |
| import java.security.spec.AlgorithmParameterSpec; |
| |
| /** |
| * This class specifies the set of parameters used for generating |
| * Diffie-Hellman (system) parameters for use in Diffie-Hellman key |
| * agreement. This is typically done by a central |
| * authority. |
| * |
| * <p> The central authority, after computing the parameters, must send this |
| * information to the parties looking to agree on a secret key. |
| * |
| * @author Jan Luehe |
| * |
| * @see DHParameterSpec |
| * @since 1.4 |
| */ |
| public class DHGenParameterSpec implements AlgorithmParameterSpec { |
| |
| // The size in bits of the prime modulus |
| private int primeSize; |
| |
| // The size in bits of the random exponent (private value) |
| private int exponentSize; |
| |
| /** |
| * Constructs a parameter set for the generation of Diffie-Hellman |
| * (system) parameters. The constructed parameter set can be used to |
| * initialize an |
| * {@link java.security.AlgorithmParameterGenerator AlgorithmParameterGenerator} |
| * object for the generation of Diffie-Hellman parameters. |
| * |
| * @param primeSize the size (in bits) of the prime modulus. |
| * @param exponentSize the size (in bits) of the random exponent. |
| */ |
| public DHGenParameterSpec(int primeSize, int exponentSize) { |
| this.primeSize = primeSize; |
| this.exponentSize = exponentSize; |
| } |
| |
| /** |
| * Returns the size in bits of the prime modulus. |
| * |
| * @return the size in bits of the prime modulus |
| */ |
| public int getPrimeSize() { |
| return this.primeSize; |
| } |
| |
| /** |
| * Returns the size in bits of the random exponent (private value). |
| * |
| * @return the size in bits of the random exponent (private value) |
| */ |
| public int getExponentSize() { |
| return this.exponentSize; |
| } |
| } |