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      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 java.security.spec;
     19 
     20 import java.math.BigInteger;
     21 
     22 /**
     23  * The parameters specifying a DSA private key.
     24  */
     25 public class DSAPrivateKeySpec implements KeySpec {
     26     // Private key
     27     private final BigInteger x;
     28     // Prime
     29     private final BigInteger p;
     30     // Sub-prime
     31      private final BigInteger q;
     32     // Base
     33     private final BigInteger g;
     34 
     35     /**
     36      * Creates a new {@code DSAPrivateKeySpec} with the specified private key,
     37      * prime, sub-prime and base.
     38      *
     39      * @param x
     40      *            the private key {@code x}.
     41      * @param p
     42      *            the prime {@code p}.
     43      * @param q
     44      *            the sub-prime {@code q}.
     45      * @param g
     46      *            the base {@code g}.
     47      */
     48     public DSAPrivateKeySpec(BigInteger x, BigInteger p,
     49             BigInteger q, BigInteger g) {
     50         this.x = x;
     51         this.p = p;
     52         this.q = q;
     53         this.g = g;
     54     }
     55 
     56     /**
     57      * Returns the base {@code g}.
     58      *
     59      * @return the base {@code g}.
     60      */
     61     public BigInteger getG() {
     62         return g;
     63     }
     64 
     65     /**
     66      * Returns the prime {@code p}.
     67      *
     68      * @return the prime {@code p}.
     69      */
     70     public BigInteger getP() {
     71         return p;
     72     }
     73 
     74     /**
     75      * Returns the sub-prime {@code q}.
     76      *
     77      * @return the sub-prime {@code q}.
     78      */
     79     public BigInteger getQ() {
     80         return q;
     81     }
     82 
     83     /**
     84      * Returns the private key {@code x}.
     85      *
     86      * @return the private key {@code x}.
     87      */
     88     public BigInteger getX() {
     89         return x;
     90     }
     91 }
     92