org.viafirma.nucleo.inicio.SecurityProvidersUtils.java Source code

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Here is the source code for org.viafirma.nucleo.inicio.SecurityProvidersUtils.java

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/* 
 * File: SecurityProvidersUtils.java
 *
 * Created on 09/09/2009
 *
 *
 * Copyright 2006-2007 Felix Garcia Borrego (borrego at gmail.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package org.viafirma.nucleo.inicio;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.impl.Log4JLogger;
import org.apache.commons.logging.impl.Log4jFactory;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.jce.provider.BouncyCastleProvider;

/**
 * Corrige problemas de compatibildad en JVM IBM.
 * java.security.NoSuchAlgorithmException: Algorithm HmacSHA2 not available
 * @author Felix Garcia Borrego (borrego at gmail.com)
 * @author Alexis Castilla Armero (pencerval at gmail.com)
 */
public class SecurityProvidersUtils {

    private static Log log = LogFactory.getLog(SecurityProvidersUtils.class);

    /**
     * Inicializa los proveedores criptograficos para corregir problemas con las
     * distintas maquinas virtuales
     */
    public static void initProviders() {
        BouncyCastleProvider bc = new BouncyCastleProvider();
        // Eliminamos el proveedor para evitar que se solapen si ya existia uno.
        Security.removeProvider(bc.getName());
        Security.addProvider(bc);
        log.info("Lista de proveedores disponible:" + Arrays.asList(Security.getProviders()));
        addHMACAlgorithm(bc, "SHA2", "org.bouncycastle.jce.provider.JCEMac$SHA256",
                "org.bouncycastle.jce.provider.JCEKeyGenerator$HMACSHA256");
        addHMACAlias(bc, "SHA2", PKCSObjectIdentifiers.id_hmacWithSHA256);
        Security.addProvider(bc);
    }

    /**
     * 
     * Aade un algoritmo concreto al proveedor
     * 
     * @param bc
     * @param algorithm
     * @param algorithmClassName
     * @param keyGeneratorClassName
     */
    private static void addHMACAlgorithm(BouncyCastleProvider bc, String algorithm, String algorithmClassName,
            String keyGeneratorClassName) {
        String mainName = "HMAC" + algorithm;
        bc.put("Mac." + mainName, algorithmClassName);
        bc.put("Alg.Alias.Mac.HMAC-" + algorithm, mainName);
        bc.put("Alg.Alias.Mac.HMAC/" + algorithm, mainName);
        bc.put("KeyGenerator." + mainName, keyGeneratorClassName);
        bc.put("Alg.Alias.KeyGenerator.HMAC-" + algorithm, mainName);
        bc.put("Alg.Alias.KeyGenerator.HMAC/" + algorithm, mainName);
    }

    /**
     * 
     * Asocia un algoritmo concreto a un alias
     * 
     * @param bc
     * @param algorithm
     * @param oid
     */
    private static void addHMACAlias(BouncyCastleProvider bc, String algorithm, DERObjectIdentifier oid) {
        String mainName = "HMAC" + algorithm;
        bc.put("Alg.Alias.Mac." + oid, mainName);
        bc.put("Alg.Alias.KeyGenerator." + oid, mainName);
    }

}