JWKPublicKeyConverter.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.
 *
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 * 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.utils.certificate;

import java.security.PublicKey;
import java.util.UUID;

import org.apache.commons.lang.StringUtils;
import org.openspcoop2.utils.UtilsException;
import org.openspcoop2.utils.resources.FileSystemUtilities;

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

    public static final String KID_NULL = "#none#";
    
    public static void main(String [] args) throws UtilsException {
        
        if(args==null || args.length<2) {
            throw new UtilsException("ERROR: argomenti non forniti (USAGE: JWKPublicKeyConverter pathPublicKey pathJWK [kid] [jwkset(true/false)] [pretty(true/false)])");
        }
        
        try {
        
            java.security.Security.addProvider(
                     new org.bouncycastle.jce.provider.BouncyCastleProvider()
            );
            
            String pathPublicKey = args[0];
            byte[] publicKey = FileSystemUtilities.readBytesFromFile(pathPublicKey);
            
            KeyUtils keyUtils = new KeyUtils(KeyUtils.ALGO_RSA);
            
            PublicKey pKey = keyUtils.getPublicKey(publicKey);
            
            String pathJWK = args[1];
                        
            String kid = null;
            if(args.length>2) {
                kid = args[2];
            }
            if(kid==null || StringUtils.isEmpty(kid)) {
                kid = UUID.randomUUID().toString();
            }
            if(KID_NULL.equals(kid)) {
                kid = null;
            }
            
            boolean jwks = true;
            if(args.length>3) {
                String tmp = args[3];
                jwks = "true".equals(tmp);
            }
            
            boolean pretty = false;
            if(args.length>4) {
                String tmp = args[4];
                pretty = "true".equals(tmp);
            }
            
            String json = convert(pKey, kid, jwks, pretty);
            
            FileSystemUtilities.writeFile(pathJWK, json.getBytes());
            
        }catch(Exception t) {
            throw new UtilsException(t.getMessage(),t);
        }
        
    }

    public static String convert(PublicKey pKey, String kid, boolean jwks, boolean pretty) throws UtilsException {
        
        JWK jwk = new JWK(pKey, kid);
        String json = null;
        
        if(jwks) {
            JWKSet jwkSet = new JWKSet();
            jwkSet.addJwk(jwk);
            json = pretty? jwkSet.getJsonPretty() : jwkSet.getJson(); 
        }
        else {
            json = pretty? jwk.getJsonPretty() : jwk.getJson(); 
        }
        
        return json;
    }
}