java/security/spec/RSAKeyGenParameterSpec.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * 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).
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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;

    /**
     * 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 RSAParameterSpec} object from the
     * given keysize and public-exponent value.
     *
     * @param keysize the modulus size (specified in number of bits)
     * @param publicExponent the public exponent
     */
    public RSAKeyGenParameterSpec(int keysize, BigInteger publicExponent) {
        this.keysize = keysize;
        this.publicExponent = publicExponent;
    }

    /**
     * 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;
    }
}