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25 
26 package java.security.spec;
27 
28 import java.math.BigInteger;
29 
30 /**
31  * This class specifies an RSA public 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 X509EncodedKeySpec
41  * @see RSAPrivateKeySpec
42  * @see RSAPrivateCrtKeySpec
43  */
44 
45 public class RSAPublicKeySpec implements KeySpec {
46 
47     private final BigInteger modulus;
48     private final BigInteger publicExponent;
49     private final AlgorithmParameterSpec params;
50 
51     /**
52      * Creates a new RSAPublicKeySpec.
53      *
54      * @param modulus the modulus
55      * @param publicExponent the public exponent
56      */
RSAPublicKeySpec(BigInteger modulus, BigInteger publicExponent)57     public RSAPublicKeySpec(BigInteger modulus, BigInteger publicExponent) {
58         this(modulus, publicExponent, null);
59     }
60 
61     /**
62      * Creates a new RSAPublicKeySpec with additional key parameters.
63      *
64      * @param modulus the modulus
65      * @param publicExponent the public exponent
66      * @param params the parameters associated with this key, may be null
67      * @since 11
68      */
RSAPublicKeySpec(BigInteger modulus, BigInteger publicExponent, AlgorithmParameterSpec params)69     public RSAPublicKeySpec(BigInteger modulus, BigInteger publicExponent,
70             AlgorithmParameterSpec params) {
71         this.modulus = modulus;
72         this.publicExponent = publicExponent;
73         this.params = params;
74     }
75 
76 
77     /**
78      * Returns the modulus.
79      *
80      * @return the modulus
81      */
getModulus()82     public BigInteger getModulus() {
83         return this.modulus;
84     }
85 
86     /**
87      * Returns the public exponent.
88      *
89      * @return the public exponent
90      */
getPublicExponent()91     public BigInteger getPublicExponent() {
92         return this.publicExponent;
93     }
94 
95     /**
96      * Returns the parameters associated with this key, may be null if not
97      * present.
98      *
99      * @return the parameters associated with this key
100      * @since 11
101      */
getParams()102     public AlgorithmParameterSpec getParams() {
103         return this.params;
104     }
105 
106 }
107