ECPrivateKeySpec


1   /*
2    * @(#)ECPrivateKeySpec.java    1.3 03/12/19
3    *
4    * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5    * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6    */
7   package java.security.spec;
8   
9   import java.math.BigInteger  ;
10  
11  /**
12   * This immutable class specifies an elliptic curve private key with 
13   * its associated parameters.
14   *
15   * @see KeySpec
16   * @see ECParameterSpec
17   *
18   * @author Valerie Peng
19   * @version 1.3, 12/19/03
20   *
21   * @since 1.5
22   */
23  public class ECPrivateKeySpec implements KeySpec   {
24      
25      private BigInteger   s;
26      private ECParameterSpec   params;
27  
28      /**
29       * Creates a new ECPrivateKeySpec with the specified 
30       * parameter values.
31       * @param s the private value.
32       * @param params the associated elliptic curve domain 
33       * parameters.
34       * @exception NullPointerException if <code>s</code>
35       * or <code>params</code> is null.
36       */
37      public ECPrivateKeySpec(BigInteger   s, ECParameterSpec   params) {
38          if (s == null) {
39              throw new NullPointerException  ("s is null");
40          }
41          if (params == null) {
42              throw new NullPointerException  ("params is null");
43          }
44      this.s = s;
45      this.params = params;
46      }
47      
48      /**
49       * Returns the private value S.
50       * @return the private value S.
51       */
52      public BigInteger   getS() {
53      return s;
54      }
55  
56      /**
57       * Returns the associated elliptic curve domain 
58       * parameters.
59       * @return the EC domain parameters.
60       */
61      public ECParameterSpec   getParams() {
62      return params;
63      }
64  }
65
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