RSAKeyPairUtil.java

/*
 * Copyright (c) 2002-2022, City of Paris
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice
 *     and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright notice
 *     and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *
 *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * License 1.0
 */
package fr.paris.lutece.util.rsa;

import java.security.GeneralSecurityException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.util.List;

import fr.paris.lutece.portal.service.spring.SpringContextService;

public class RSAKeyPairUtil
{
    private static RSAKeyPairUtil _instance;
    private static String RSA_KEY_PROVIDER_BEAN_NAME = "RSAKeyProvider";
    private PrivateKey _privateKey;
    private PublicKey _publicKey;

    private RSAKeyPairUtil( ) throws GeneralSecurityException
    {
        readKeys( );
    }

    public static RSAKeyPairUtil getInstance( ) throws GeneralSecurityException
    {
        if ( _instance == null )
        {
            _instance = new RSAKeyPairUtil( );
        }
        return _instance;
    }

    /**
     * @return the privateKey
     */
    public PrivateKey getPrivateKey( )
    {
        return _privateKey;
    }

    /**
     * @return the publicKey
     */
    public PublicKey getPublicKey( )
    {
        return _publicKey;
    }

    /**
     * get the public and private key
     * s
     * @throws GeneralSecurityException
     */
    private void readKeys( ) throws GeneralSecurityException
    {
        IRSAKeyProvider rsaKeyProvider = SpringContextService.getBean( RSA_KEY_PROVIDER_BEAN_NAME );
        
        if ( rsaKeyProvider == null )
        {
        	throw new GeneralSecurityException( "RSA Key Provider not found.");
        }
        else
        {
        	_publicKey = rsaKeyProvider.getPublicKey( );
        	_privateKey = rsaKeyProvider.getPrivateKey( );
        }
    }
}