/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.pdfbox.pdmodel.encryption;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.security.Provider;
/**
* Singleton which provides a security provider.
*
*/
public class SecurityProvider
{
private static Provider provider = null;
private SecurityProvider()
{
}
/**
* Returns the provider to be used for advanced encrypting/decrypting. Default is the BouncyCastleProvider.
*
* @return the security provider
*
* @throws IOException if the default provider can't be instantiated
*/
public static Provider getProvider() throws IOException
{
// TODO synchronize access
if (provider == null)
{
try
{
Class<Provider> providerClass = (Class<Provider>) Class
.forName("org.bouncycastle.jce.provider.BouncyCastleProvider");
provider = providerClass.getDeclaredConstructor().newInstance();
}
catch (ClassNotFoundException | InstantiationException | IllegalAccessException |
NoSuchMethodException | SecurityException | IllegalArgumentException |
InvocationTargetException ex)
{
throw new IOException(ex);
}
}
return provider;
}
/**
* Set the provider to be used for advanced encrypting/decrypting.
*
* @param provider the security provider
*/
public static void setProvider(Provider provider)
{
SecurityProvider.provider = provider;
}
}