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25 
26 package java.security.spec;
27 
28 import java.math.BigInteger;
29 
30 /**
31  * This class specifies a DSA private key with its associated parameters.
32  *
33  * @author Jan Luehe
34  *
35  *
36  * @see java.security.Key
37  * @see java.security.KeyFactory
38  * @see KeySpec
39  * @see DSAPublicKeySpec
40  * @see PKCS8EncodedKeySpec
41  *
42  * @since 1.2
43  */
44 
45 public class DSAPrivateKeySpec implements KeySpec {
46 
47     private BigInteger x;
48     private BigInteger p;
49     private BigInteger q;
50     private BigInteger g;
51 
52     /**
53      * Creates a new DSAPrivateKeySpec with the specified parameter values.
54      *
55      * @param x the private key.
56      *
57      * @param p the prime.
58      *
59      * @param q the sub-prime.
60      *
61      * @param g the base.
62      */
DSAPrivateKeySpec(BigInteger x, BigInteger p, BigInteger q, BigInteger g)63     public DSAPrivateKeySpec(BigInteger x, BigInteger p, BigInteger q,
64                              BigInteger g) {
65         this.x = x;
66         this.p = p;
67         this.q = q;
68         this.g = g;
69     }
70 
71     /**
72      * Returns the private key {@code x}.
73      *
74      * @return the private key {@code x}.
75      */
getX()76     public BigInteger getX() {
77         return this.x;
78     }
79 
80     /**
81      * Returns the prime {@code p}.
82      *
83      * @return the prime {@code p}.
84      */
getP()85     public BigInteger getP() {
86         return this.p;
87     }
88 
89     /**
90      * Returns the sub-prime {@code q}.
91      *
92      * @return the sub-prime {@code q}.
93      */
getQ()94     public BigInteger getQ() {
95         return this.q;
96     }
97 
98     /**
99      * Returns the base {@code g}.
100      *
101      * @return the base {@code g}.
102      */
getG()103     public BigInteger getG() {
104         return this.g;
105     }
106 }
107