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    1   /*
    2    * Copyright (c) 1999, 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   import java.security.spec.AlgorithmParameterSpec;
   30   
   31   /**
   32    * This class specifies the set of parameters used to generate an RSA
   33    * key pair.
   34    *
   35    * @author Jan Luehe
   36    *
   37    * @see java.security.KeyPairGenerator#initialize(java.security.spec.AlgorithmParameterSpec)
   38    *
   39    * @since 1.3
   40    */
   41   
   42   public class RSAKeyGenParameterSpec implements AlgorithmParameterSpec {
   43   
   44       private int keysize;
   45       private BigInteger publicExponent;
   46   
   47       /**
   48        * The public-exponent value F0 = 3.
   49        */
   50       public static final BigInteger F0 = BigInteger.valueOf(3);
   51   
   52       /**
   53        * The public exponent-value F4 = 65537.
   54        */
   55       public static final BigInteger F4 = BigInteger.valueOf(65537);
   56   
   57       /**
   58        * Constructs a new <code>RSAParameterSpec</code> object from the
   59        * given keysize and public-exponent value.
   60        *
   61        * @param keysize the modulus size (specified in number of bits)
   62        * @param publicExponent the public exponent
   63        */
   64       public RSAKeyGenParameterSpec(int keysize, BigInteger publicExponent) {
   65           this.keysize = keysize;
   66           this.publicExponent = publicExponent;
   67       }
   68   
   69       /**
   70        * Returns the keysize.
   71        *
   72        * @return the keysize.
   73        */
   74       public int getKeysize() {
   75           return keysize;
   76       }
   77   
   78       /**
   79        * Returns the public-exponent value.
   80        *
   81        * @return the public-exponent value.
   82        */
   83       public BigInteger getPublicExponent() {
   84           return publicExponent;
   85       }
   86   }

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