com.intel.chimera.random.SecureRandomFactory.java Source code

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Here is the source code for com.intel.chimera.random.SecureRandomFactory.java

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/**
 * 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 com.intel.chimera.random;

import java.util.Properties;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Splitter;

import com.intel.chimera.utils.ReflectionUtils;
import static com.intel.chimera.conf.ConfigurationKeys.CHIMERA_CRYPTO_SECURE_RANDOM_CLASSES_KEY;

/**
 * The Factory for SecureRandom.
 */
public class SecureRandomFactory {
    public final static Logger LOG = LoggerFactory.getLogger(SecureRandomFactory.class);

    public static SecureRandom getSecureRandom(Properties props) {
        String secureRandomClasses = props.getProperty(CHIMERA_CRYPTO_SECURE_RANDOM_CLASSES_KEY);
        if (secureRandomClasses == null) {
            secureRandomClasses = System.getProperty(CHIMERA_CRYPTO_SECURE_RANDOM_CLASSES_KEY);
        }

        SecureRandom random = null;
        if (secureRandomClasses != null) {
            for (String klassName : Splitter.on(',').trimResults().omitEmptyStrings().split(secureRandomClasses)) {
                try {
                    final Class klass = ReflectionUtils.getClassByName(klassName);
                    random = (SecureRandom) ReflectionUtils.newInstance(klass, props);
                    if (random != null) {
                        break;
                    }
                } catch (ClassCastException e) {
                    LOG.error("Class {} is not a Cipher.", klassName);
                } catch (ClassNotFoundException e) {
                    LOG.error("Cipher {} not found.", klassName);
                }
            }
        }

        return (random == null) ? new JavaSecureRandom(props) : random;
    }
}