org.xipki.security.bcext.BCRSAPrivateKey.java Source code

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Here is the source code for org.xipki.security.bcext.BCRSAPrivateKey.java

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/*
 *
 * This file is part of the XiPKI project.
 * Copyright (c) 2014 - 2015 Lijun Liao
 * Author: Lijun Liao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * THE AUTHOR LIJUN LIAO. LIJUN LIAO DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the XiPKI software without
 * disclosing the source code of your own applications.
 *
 * For more information, please contact Lijun Liao at this
 * address: lijun.liao@gmail.com
 */

package org.xipki.security.bcext;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import java.security.interfaces.RSAPrivateKey;
import java.security.spec.RSAPrivateKeySpec;
import java.util.Enumeration;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.DERNull;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.crypto.params.RSAKeyParameters;
import org.bouncycastle.jcajce.provider.asymmetric.util.KeyUtil;
import org.bouncycastle.jcajce.provider.asymmetric.util.PKCS12BagAttributeCarrierImpl;
import org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier;

/**
 * Copied from BouncyCastle under license MIT
 *
 * @author Lijun Liao
 */

public class BCRSAPrivateKey implements RSAPrivateKey, PKCS12BagAttributeCarrier {
    static final long serialVersionUID = 5110188922551353628L;

    private static BigInteger ZERO = BigInteger.valueOf(0);

    protected BigInteger modulus;
    protected BigInteger privateExponent;

    private transient PKCS12BagAttributeCarrierImpl attrCarrier = new PKCS12BagAttributeCarrierImpl();

    protected BCRSAPrivateKey() {
    }

    public BCRSAPrivateKey(final RSAKeyParameters key) {
        this.modulus = key.getModulus();
        this.privateExponent = key.getExponent();
    }

    public BCRSAPrivateKey(final RSAPrivateKeySpec spec) {
        this.modulus = spec.getModulus();
        this.privateExponent = spec.getPrivateExponent();
    }

    public BCRSAPrivateKey(final RSAPrivateKey key) {
        this.modulus = key.getModulus();
        this.privateExponent = key.getPrivateExponent();
    }

    public BigInteger getModulus() {
        return modulus;
    }

    public BigInteger getPrivateExponent() {
        return privateExponent;
    }

    public String getAlgorithm() {
        return "RSA";
    }

    public String getFormat() {
        return "PKCS#8";
    }

    public byte[] getEncoded() {
        return KeyUtil.getEncodedPrivateKeyInfo(
                new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE),
                new org.bouncycastle.asn1.pkcs.RSAPrivateKey(getModulus(), ZERO, getPrivateExponent(), ZERO, ZERO,
                        ZERO, ZERO, ZERO));
    }

    public boolean equals(final Object o) {
        if (!(o instanceof RSAPrivateKey)) {
            return false;
        }

        if (o == this) {
            return true;
        }

        RSAPrivateKey key = (RSAPrivateKey) o;

        return getModulus().equals(key.getModulus()) && getPrivateExponent().equals(key.getPrivateExponent());
    }

    public int hashCode() {
        return getModulus().hashCode() ^ getPrivateExponent().hashCode();
    }

    public void setBagAttribute(final ASN1ObjectIdentifier oid, final ASN1Encodable attribute) {
        attrCarrier.setBagAttribute(oid, attribute);
    }

    public ASN1Encodable getBagAttribute(final ASN1ObjectIdentifier oid) {
        return attrCarrier.getBagAttribute(oid);
    }

    public Enumeration<?> getBagAttributeKeys() {
        return attrCarrier.getBagAttributeKeys();
    }

    private void readObject(final ObjectInputStream in) throws IOException, ClassNotFoundException {
        in.defaultReadObject();

        this.attrCarrier = new PKCS12BagAttributeCarrierImpl();
    }

    private void writeObject(final ObjectOutputStream out) throws IOException {
        out.defaultWriteObject();
    }
}