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25 
26 package java.security.spec;
27 
28 import java.math.BigInteger;
29 
30 /**
31  * This class specifies an RSA private key.
32  *
33  * @author Jan Luehe
34  * @since 1.2
35  *
36  *
37  * @see java.security.Key
38  * @see java.security.KeyFactory
39  * @see KeySpec
40  * @see PKCS8EncodedKeySpec
41  * @see RSAPublicKeySpec
42  * @see RSAPrivateCrtKeySpec
43  */
44 
45 public class RSAPrivateKeySpec implements KeySpec {
46 
47     private final BigInteger modulus;
48     private final BigInteger privateExponent;
49     private final AlgorithmParameterSpec params;
50 
51     /**
52      * Creates a new RSAPrivateKeySpec.
53      *
54      * @param modulus the modulus
55      * @param privateExponent the private exponent
56      */
RSAPrivateKeySpec(BigInteger modulus, BigInteger privateExponent)57     public RSAPrivateKeySpec(BigInteger modulus, BigInteger privateExponent) {
58         this(modulus, privateExponent, null);
59     }
60 
61     /**
62      * Creates a new RSAPrivateKeySpec with additional key parameters.
63      *
64      * @param modulus the modulus
65      * @param privateExponent the private exponent
66      * @param params the parameters associated with this key, may be null
67      * @since 11
68      */
RSAPrivateKeySpec(BigInteger modulus, BigInteger privateExponent, AlgorithmParameterSpec params)69     public RSAPrivateKeySpec(BigInteger modulus, BigInteger privateExponent,
70             AlgorithmParameterSpec params) {
71         this.modulus = modulus;
72         this.privateExponent = privateExponent;
73         this.params = params;
74     }
75 
76     /**
77      * Returns the modulus.
78      *
79      * @return the modulus
80      */
getModulus()81     public BigInteger getModulus() {
82         return this.modulus;
83     }
84 
85     /**
86      * Returns the private exponent.
87      *
88      * @return the private exponent
89      */
getPrivateExponent()90     public BigInteger getPrivateExponent() {
91         return this.privateExponent;
92     }
93 
94     /**
95      * Returns the parameters associated with this key, may be null if not
96      * present.
97      *
98      * @return the parameters associated with this key
99      * @since 11
100      */
getParams()101     public AlgorithmParameterSpec getParams() {
102         return this.params;
103     }
104 }
105