SymmetricKeystore.java

/*
 * GovWay - A customizable API Gateway 
 * https://govway.org
 * 
 * Copyright (c) 2005-2025 Link.it srl (https://link.it). 
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3, as published by
 * the Free Software Foundation.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package org.openspcoop2.security.keystore;

import java.io.Serializable;
import java.security.Key;

import javax.crypto.spec.SecretKeySpec;

import org.openspcoop2.security.Constants;
import org.openspcoop2.security.SecurityException;
import org.openspcoop2.utils.certificate.KeyStore;
import org.openspcoop2.utils.certificate.byok.BYOKRequestParams;

/**
 * SymmetricKeystore
 *
 * @author Andrea Poli (apoli@link.it)
 * @author $Author$
 * @version $Rev$, $Date$
 */
public class SymmetricKeystore implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;
        
    private SecretKeySpec key = null;
    private transient KeyStore keyStore = null;
    private String pwKey = null;
    private String alias = null;
    
    @Override
    public String toString() {
        StringBuilder bf = new StringBuilder();
        bf.append("SymmetricKeystore (").append(this.alias).append(") ");
        return bf.toString();
    }
    
    public SymmetricKeystore(String alias,String key,String algoritmo) throws SecurityException{
        this(alias, key, algoritmo, null);
    }
    public SymmetricKeystore(String alias,String key,String algoritmo, BYOKRequestParams requestParams) throws SecurityException{
        try{
            String algorithm = null;
            if(Constants.TRIPLE_DES.equals(algoritmo)){
                algorithm = "DESede";
            }
            else{
                algorithm = "DES"; // default
            }

            byte[] keyBytes = key.getBytes();
            
            if(requestParams!=null) {
                keyBytes = StoreUtils.unwrapBYOK(keyBytes, requestParams);  
            }
            
            this.key = new SecretKeySpec(keyBytes,algorithm);
            
            this.alias = alias;
            this.pwKey = "PW_CUSTOM";
            
            this.initKS();
            
        }catch(Exception e){
            throw new SecurityException(e.getMessage(),e);
        }
    }
    
    private void checkInit() throws SecurityException{
        if(this.keyStore==null) {
            this.initKS();
        }
    }
    private synchronized void initKS() throws SecurityException{
        if(this.keyStore==null) {
            try {
                java.security.KeyStore keyStoreJCEKS = java.security.KeyStore.getInstance("JCEKS");
                keyStoreJCEKS.load(null);
                keyStoreJCEKS.setKeyEntry(this.alias, this.key,this.pwKey.toCharArray(), null);
                this.keyStore = new KeyStore(keyStoreJCEKS);
                FixTrustAnchorsNotEmpty.addCertificate(this.keyStore.getKeystore());            
            }
            catch(Exception e){
                throw new SecurityException(e.getMessage(),e);
            }
        }
    }
    
    
    public Key getKey() {
        return this.key;
    }

    public KeyStore getKeyStore() throws SecurityException {
        this.checkInit(); // per ripristino da Serializable
        return this.keyStore; 
    }

    public String getPasswordKey() {
        return this.pwKey;
    }

}