RSAKeyGenParameterSpec


1   /*
2    * @(#)RSAKeyGenParameterSpec.java  1.8 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   
8   package java.security.spec;
9   
10  import java.math.BigInteger  ;
11  import java.security.spec.AlgorithmParameterSpec  ;
12  
13  /**
14   * This class specifies the set of parameters used to generate an RSA
15   * key pair.
16   * 
17   * @author Jan Luehe
18   * @version 1.8 12/19/03
19   *
20   * @see java.security.KeyPairGenerator#initialize(java.security.spec.AlgorithmParameterSpec)
21   *
22   * @since 1.3
23   */
24  
25  public class RSAKeyGenParameterSpec implements AlgorithmParameterSpec   {
26  
27      private int keysize;
28      private BigInteger   publicExponent;
29  
30      /**
31       * The public-exponent value F0 = 3.
32       */
33      public static final BigInteger   F0 = BigInteger.valueOf(3);
34  
35      /**
36       * The public exponent-value F4 = 65537.
37       */
38      public static final BigInteger   F4 = BigInteger.valueOf(65537);
39  
40      /**
41       * Constructs a new <code>RSAParameterSpec</code> object from the
42       * given keysize and public-exponent value.
43       *
44       * @param keysize the modulus size (specified in number of bits)
45       * @param publicExponent the public exponent
46       */
47      public RSAKeyGenParameterSpec(int keysize, BigInteger   publicExponent) {
48      this.keysize = keysize;
49      this.publicExponent = publicExponent;
50      }
51  
52      /**
53       * Returns the keysize.
54       *
55       * @return the keysize.
56       */
57      public int getKeysize() {
58      return keysize;
59      }
60  
61      /**
62       * Returns the public-exponent value.
63       *
64       * @return the public-exponent value.
65       */
66      public BigInteger   getPublicExponent() {
67      return publicExponent;
68      }
69  }
70
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