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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

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 *

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package java.security.spec;

import java.math.BigInteger;

import java.security.spec.AlgorithmParameterSpec;

/**

 * This class specifies the set of parameters used to generate an RSA

 * key pair.

 *

 * @author Jan Luehe

 *

 * @see java.security.KeyPairGenerator#initialize(java.security.spec.AlgorithmParameterSpec)

 *

 * @since 1.3

 */

public class RSAKeyGenParameterSpec implements AlgorithmParameterSpec {

    private int keysize;

    private BigInteger publicExponent;

    private AlgorithmParameterSpec keyParams;

    /**

     * The public-exponent value F0 = 3.

     */

    public static final BigInteger F0 = BigInteger.valueOf(3);

    /**

     * The public exponent-value F4 = 65537.

     */

    public static final BigInteger F4 = BigInteger.valueOf(65537);

    /**

     * Constructs a new {@code RSAKeyGenParameterSpec} object from the

     * given keysize, public-exponent value, and null key parameters.

     *

     * @param keysize the modulus size (specified in number of bits)

     * @param publicExponent the public exponent

     */

    public RSAKeyGenParameterSpec(int keysize, BigInteger publicExponent) {

        this(keysize, publicExponent, null);

    }

    /**

     * Constructs a new {@code RSAKeyGenParameterSpec} object from the

     * given keysize, public-exponent value, and key parameters.

     *

     * @param keysize the modulus size (specified in number of bits)

     * @param publicExponent the public exponent

     * @param keyParams the key parameters, may be null

     * @since 11

     */

    public RSAKeyGenParameterSpec(int keysize, BigInteger publicExponent,

            AlgorithmParameterSpec keyParams) {

        this.keysize = keysize;

        this.publicExponent = publicExponent;

        this.keyParams = keyParams;

    }

    /**

     * Returns the keysize.

     *

     * @return the keysize.

     */

    public int getKeysize() {

        return keysize;

    }

    /**

     * Returns the public-exponent value.

     *

     * @return the public-exponent value.

     */

    public BigInteger getPublicExponent() {

        return publicExponent;

    }

    /**

     * Returns the parameters to be associated with key.

     *

     * @return the associated parameters, may be null if

     *         not present

     * @since 11

     */

    public AlgorithmParameterSpec getKeyParams() {

        return keyParams;

    }

}