The Android Open Source Project | b5de22c | 2012-04-01 00:00:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
| 3 | * contributor license agreements. See the NOTICE file distributed with |
| 4 | * this work for additional information regarding copyright ownership. |
| 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
| 6 | * (the "License"); you may not use this file except in compliance with |
| 7 | * the License. You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | package javax.crypto.spec; |
| 19 | |
| 20 | import java.math.BigInteger; |
| 21 | import java.security.spec.AlgorithmParameterSpec; |
| 22 | |
| 23 | /** |
| 24 | * The algorithm parameter specification for the Diffie-Hellman algorithm. |
| 25 | */ |
| 26 | public class DHParameterSpec implements AlgorithmParameterSpec { |
| 27 | |
| 28 | private final BigInteger p; |
| 29 | private final BigInteger g; |
| 30 | private final int l; |
| 31 | |
| 32 | /** |
| 33 | * Creates a new <code>DHParameterSpec</code> instance with the specified |
| 34 | * <i>prime modulus</i> and <i>base generator</i>. |
| 35 | * |
| 36 | * @param p |
| 37 | * the prime modulus. |
| 38 | * @param g |
| 39 | * the base generator. |
| 40 | */ |
| 41 | public DHParameterSpec(BigInteger p, BigInteger g) { |
| 42 | this.p = p; |
| 43 | this.g = g; |
| 44 | this.l = 0; |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Creates a new <code>DHParameterSpec</code> instance with the specified |
| 49 | * <i>prime modulus</i>, <i>base generator</i> and size (in bits) of the |
| 50 | * <i>random exponent</i>. |
| 51 | * |
| 52 | * @param p |
| 53 | * the prime modulus. |
| 54 | * @param g |
| 55 | * the base generator. |
| 56 | * @param l |
| 57 | * the size of the random exponent (in bits). |
| 58 | */ |
| 59 | public DHParameterSpec(BigInteger p, BigInteger g, int l) { |
| 60 | this.p = p; |
| 61 | this.g = g; |
| 62 | this.l = l; |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Returns the <i>prime modulus</i> of this parameter specification. |
| 67 | * |
| 68 | * @return the prime modulus. |
| 69 | */ |
| 70 | public BigInteger getP() { |
| 71 | return p; |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Returns the <i>base generator</i> of this parameter specification. |
| 76 | * |
| 77 | * @return the base generator. |
| 78 | */ |
| 79 | public BigInteger getG() { |
| 80 | return g; |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Returns the size (in bits) of the <i>random exponent</i>. |
| 85 | * |
| 86 | * @return the size (in bits) of the random exponent. |
| 87 | */ |
| 88 | public int getL() { |
| 89 | return l; |
| 90 | } |
| 91 | } |
| 92 | |