1 /*
   2  * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  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      */
  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      */
  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      */
  82     public BigInteger getModulus() {
  83         return this.modulus;
  84     }
  85 
  86     /**
  87      * Returns the public exponent.
  88      *
  89      * @return the public exponent
  90      */
  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      */
 102     public AlgorithmParameterSpec getParams() {
 103         return this.params;
 104     }
 105 
 106 }