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The Apache WSS4J project provides a Java implementation of the primary security standards
for Web Services, namely the OASIS Web Services Security (WS-Security) specifications
from the OASIS Web Services Security TC.
/**
* 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.ws.security.saml;
import org.apache.ws.security.WSSecurityException;
import org.apache.ws.security.util.Loader;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.net.URL;
import java.util.Properties;
/**
* CryptoFactory.
*
*
* @author Davanum Srinivas ([email protected]).
*/
public abstract class SAMLIssuerFactory {
private static final org.apache.commons.logging.Log LOG =
org.apache.commons.logging.LogFactory.getLog(SAMLIssuerFactory.class);
private static final Class DEFAULT_SAML_CLASS =
org.apache.ws.security.saml.SAMLIssuerImpl.class;
/**
* getInstance
*
* Returns an instance of SAMLIssuer. This method uses the file
* saml.properties to determine which implementation to
* use. Thus the property org.apache.ws.security.saml.issuerClass
* must define the classname of the SAMLIssuer implementation. The file
* may contain other property definitions as well. These properties are
* handed over to the SAMLIssuer implementation. The file
* saml.properties is loaded with the
* Loader.getResource() method.
*
*
* @return The SAMLIssuer implementation was defined
* @throws WSSecurityException if there is an error in loading the crypto properties
*/
public static SAMLIssuer getInstance() throws WSSecurityException {
return getInstance("saml.properties");
}
/**
* getInstance
*
* Returns an instance of SAMLIssuer. The properties are handed over the the SAMLIssuer
* implementation. The properties can be null. It is dependent on the
* SAMLIssuer implementation how the initialization is done in this case.
*
*
* @param samlClass This is the SAMLIssuer implementation class. No default is
* provided here.
* @param properties The Properties that are forwarded to the SAMLIssuer implementation.
* These properties are dependent on the SAMLIssuer implementation
* @return The SAMLIssuer implementation or null if no samlClassName was defined
* @throws WSSecurityException if there is an error in loading the crypto properties
*/
public static SAMLIssuer getInstance(
Class samlClass,
Properties properties
) throws WSSecurityException {
return loadClass(samlClass, properties);
}
public static SAMLIssuer getInstance(Properties properties) throws WSSecurityException {
String samlClassName =
properties.getProperty("org.apache.ws.security.saml.issuerClass");
Class samlIssuerClass = null;
if (samlClassName == null
|| samlClassName.equals("org.apache.ws.security.saml.SAMLIssuerImpl")) {
samlIssuerClass = DEFAULT_SAML_CLASS;
} else {
try {
// instruct the class loader to load the crypto implementation
samlIssuerClass = Loader.loadClass(samlClassName, SAMLIssuer.class);
} catch (ClassNotFoundException ex) {
if (LOG.isDebugEnabled()) {
LOG.debug(ex.getMessage(), ex);
}
throw new WSSecurityException(samlClassName + " Not Found", ex);
}
}
return loadClass(samlIssuerClass, properties);
}
/**
* getInstance
*
* Returns an instance of SAMLIssuer. This method uses the specified filename
* to load a property file. This file shall use the property
* org.apache.ws.security.saml.issuerClass
* to define the classname of the SAMLIssuer implementation. The file
* may contain other property definitions as well. These properties are
* handed over to the SAMLIssuer implementation. The specified file
* is loaded with the Loader.getResource() method.
*
*
* @param propFilename The name of the property file to load
* @return The SAMLIssuer implementation that was defined
* @throws WSSecurityException if there is an error in loading the crypto properties
*/
public static SAMLIssuer getInstance(String propFilename) throws WSSecurityException {
return getInstance(getProperties(propFilename));
}
private static SAMLIssuer loadClass(
Class samlIssuerClass,
Properties properties
) throws WSSecurityException {
SAMLIssuer samlIssuer = null;
if (LOG.isDebugEnabled()) {
LOG.debug("Using Crypto Engine [" + samlIssuerClass + "]");
}
try {
Class[] classes = new Class[]{Properties.class};
Constructor c = samlIssuerClass.getConstructor(classes);
samlIssuer = c.newInstance(new Object[]{properties});
return samlIssuer;
} catch (java.lang.Exception ex) {
if (LOG.isDebugEnabled()) {
LOG.debug(ex.getMessage(), ex);
}
throw new WSSecurityException(samlIssuerClass.getName() + " cannot create instance", ex);
}
}
/**
* Gets the properties for SAML issuer.
* The functions loads the property file via
* {@link Loader.getResource(String)}, thus the property file
* should be accessible via the classpath
*
* @param propFilename the properties file to load
* @return a Properties object loaded from the filename
* @throws WSSecurityException if there is an error in loading the crypto properties
*/
private static Properties getProperties(String propFilename) throws WSSecurityException {
Properties properties = new Properties();
try {
URL url = Loader.getResource(propFilename);
if (url == null) {
throw new WSSecurityException(
WSSecurityException.FAILURE,
"resourceNotFound",
new Object[]{propFilename}
);
}
properties.load(url.openStream());
} catch (IOException e) {
if (LOG.isDebugEnabled()) {
LOG.debug("Cannot find resource: " + propFilename, e);
}
throw new WSSecurityException(
WSSecurityException.FAILURE,
"resourceNotFound",
new Object[]{propFilename},
e
);
}
return properties;
}
}