ProviderUtils.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.utils.security;

import java.security.Security;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

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

    public static void addBouncyCastle() {
        add(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    }
    public static void add(java.security.Provider provider) {
        java.security.Security.addProvider(provider);
    }
    
    public static void addBouncyCastleAfterSun(boolean overrideIfExists) {
        /**Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());*/
        if(overrideIfExists) {
            addOverrideIfExists(new org.bouncycastle.jce.provider.BouncyCastleProvider(), 2); // lasciare alla posizione 1 il provider 'SUN'
        }
        else {
            addIfNotExists(new org.bouncycastle.jce.provider.BouncyCastleProvider(), 2); // lasciare alla posizione 1 il provider 'SUN'
        }
    }
    
    public static void addIfNotExists(java.security.Provider provider, int position) {
        if(Security.getProvider(provider.getName())==null) {
            Security.insertProviderAt(provider, position); 
        }
    }
    // NOTA: utility Security.insertProviderAt utilizza una posizione vera e non da programmatore che parte da 0!!!!!!!!!!!
    public static void addOverrideIfExists(java.security.Provider provider, int position) { 
        if(Security.getProvider(provider.getName())!=null) {
            List<java.security.Provider> l = getProviders();
            if(!l.isEmpty() && l.size()>(position-1) && l.get((position-1)).getName().equals(provider.getName())) {
                return; // gia presente alla posizione due
            }           
            Security.removeProvider(provider.getName());
        }
        Security.insertProviderAt(provider, position); 
    }
    
    public static boolean existsBouncyCastle() {
        return exists(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    }
    public static boolean exists(java.security.Provider provider) {
        return Security.getProvider(provider.getName())!=null;
    }
    
    public static boolean existsBouncyCastle(int position) {
        return exists(new org.bouncycastle.jce.provider.BouncyCastleProvider(), position);
    }
    public static boolean exists(java.security.Provider provider, int position) {
        List<java.security.Provider> l = getProviders();
        if(l.isEmpty() || l.size()<position) {
            return false;
        }
        return l.get(position).getName().equals(provider.getName());
    }
    
    public static void removeBouncyCastle() {
        remove(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    }
    public static void remove(java.security.Provider provider) {
        Security.removeProvider(provider.getName());
    }
    
    public static List<java.security.Provider> getProviders(){
        List<java.security.Provider> l = new ArrayList<>();
        java.security.Provider [] p = Security.getProviders();
        if(p!=null && p.length>0) {
            l.addAll(Arrays.asList(p));
        }
        return l;
    }
    public static List<String> getProviderNames(){
        List<String> l = new ArrayList<>();
        List<java.security.Provider> lp = getProviders();
        if(!lp.isEmpty()) {
            for (java.security.Provider provider : lp) {
                l.add(provider.getName());
            }
        }
        return l;
    }
 }