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org.apache.xml.security.Init Maven / Gradle / Ivy
/**
* 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.xml.security;
import java.io.InputStream;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.List;
import org.apache.xml.security.algorithms.JCEMapper;
import org.apache.xml.security.algorithms.SignatureAlgorithm;
import org.apache.xml.security.c14n.Canonicalizer;
import org.apache.xml.security.exceptions.XMLSecurityException;
import org.apache.xml.security.keys.keyresolver.KeyResolver;
import org.apache.xml.security.transforms.Transform;
import org.apache.xml.security.utils.ElementProxy;
import org.apache.xml.security.utils.I18n;
import org.apache.xml.security.utils.XMLUtils;
import org.apache.xml.security.utils.resolver.ResourceResolver;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* This class does the configuration of the library. This includes creating
* the mapping of Canonicalization and Transform algorithms. Initialization is
* done by calling {@link Init#init} which should be done in any static block
* of the files of this library. We ensure that this call is only executed once.
*/
public class Init {
/** The namespace for CONF file **/
public static final String CONF_NS = "http://www.xmlsecurity.org/NS/#configuration";
private static final org.slf4j.Logger LOG =
org.slf4j.LoggerFactory.getLogger(Init.class);
/** Field alreadyInitialized */
private static boolean alreadyInitialized = false;
/**
* Method isInitialized
* @return true if the library is already initialized.
*/
public static final synchronized boolean isInitialized() {
return Init.alreadyInitialized;
}
/**
* Method init
*
*/
public static synchronized void init() {
if (alreadyInitialized) {
return;
}
InputStream is =
AccessController.doPrivileged(
(PrivilegedAction)
() -> {
String cfile =
System.getProperty("org.apache.xml.security.resource.config");
if (cfile == null) {
return null;
}
return Init.class.getResourceAsStream(cfile);
}
);
if (is == null) {
dynamicInit();
} else {
fileInit(is);
}
alreadyInitialized = true;
}
/**
* Dynamically initialise the library by registering the default algorithms/implementations
*/
private static void dynamicInit() {
//
// Load the Resource Bundle - the default is the English resource bundle.
// To load another resource bundle, call I18n.init(...) before calling this
// method.
//
I18n.init("en", "US");
LOG.debug("Registering default algorithms");
try {
//
// Bind the default prefixes
//
ElementProxy.registerDefaultPrefixes();
} catch (XMLSecurityException ex) {
LOG.error(ex.getMessage(), ex);
}
//
// Set the default Transforms
//
Transform.registerDefaultAlgorithms();
//
// Set the default signature algorithms
//
SignatureAlgorithm.registerDefaultAlgorithms();
//
// Set the default JCE algorithms
//
JCEMapper.registerDefaultAlgorithms();
//
// Set the default c14n algorithms
//
Canonicalizer.registerDefaultAlgorithms();
//
// Register the default resolvers
//
ResourceResolver.registerDefaultResolvers();
//
// Register the default key resolvers
//
KeyResolver.registerDefaultResolvers();
}
/**
* Initialise the library from a configuration file
*/
private static void fileInit(InputStream is) {
try {
/* read library configuration file */
Document doc = XMLUtils.read(is, true);
Node config = doc.getFirstChild();
for (; config != null; config = config.getNextSibling()) {
if ("Configuration".equals(config.getLocalName())) {
break;
}
}
if (config == null) {
LOG.error("Error in reading configuration file - Configuration element not found");
return;
}
for (Node el = config.getFirstChild(); el != null; el = el.getNextSibling()) {
if (Node.ELEMENT_NODE != el.getNodeType()) {
continue;
}
String tag = el.getLocalName();
if ("ResourceBundles".equals(tag)) {
Element resource = (Element)el;
/* configure internationalization */
Attr langAttr = resource.getAttributeNodeNS(null, "defaultLanguageCode");
Attr countryAttr = resource.getAttributeNodeNS(null, "defaultCountryCode");
String languageCode =
(langAttr == null) ? null : langAttr.getNodeValue();
String countryCode =
(countryAttr == null) ? null : countryAttr.getNodeValue();
I18n.init(languageCode, countryCode);
}
if ("CanonicalizationMethods".equals(tag)) {
Element[] list =
XMLUtils.selectNodes(el.getFirstChild(), CONF_NS, "CanonicalizationMethod");
for (Element element : list) {
String uri = element.getAttributeNS(null, "URI");
String javaClass =
element.getAttributeNS(null, "JAVACLASS");
try {
Canonicalizer.register(uri, javaClass);
LOG.debug("Canonicalizer.register({}, {})", uri, javaClass);
} catch (ClassNotFoundException e) {
Object exArgs[] = { uri, javaClass };
LOG.error(I18n.translate("algorithm.classDoesNotExist", exArgs));
}
}
}
if ("TransformAlgorithms".equals(tag)) {
Element[] tranElem =
XMLUtils.selectNodes(el.getFirstChild(), CONF_NS, "TransformAlgorithm");
for (Element element : tranElem) {
String uri = element.getAttributeNS(null, "URI");
String javaClass =
element.getAttributeNS(null, "JAVACLASS");
try {
Transform.register(uri, javaClass);
LOG.debug("Transform.register({}, {})", uri, javaClass);
} catch (ClassNotFoundException e) {
Object exArgs[] = { uri, javaClass };
LOG.error(I18n.translate("algorithm.classDoesNotExist", exArgs));
} catch (NoClassDefFoundError ex) {
LOG.warn("Not able to found dependencies for algorithm, I'll keep working.");
}
}
}
if ("JCEAlgorithmMappings".equals(tag)) {
Node algorithmsNode = ((Element)el).getElementsByTagName("Algorithms").item(0);
if (algorithmsNode != null) {
Element[] algorithms =
XMLUtils.selectNodes(algorithmsNode.getFirstChild(), CONF_NS, "Algorithm");
for (Element element : algorithms) {
String id = element.getAttributeNS(null, "URI");
JCEMapper.register(id, new JCEMapper.Algorithm(element));
}
}
}
if ("SignatureAlgorithms".equals(tag)) {
Element[] sigElems =
XMLUtils.selectNodes(el.getFirstChild(), CONF_NS, "SignatureAlgorithm");
for (Element sigElem : sigElems) {
String uri = sigElem.getAttributeNS(null, "URI");
String javaClass =
sigElem.getAttributeNS(null, "JAVACLASS");
/** $todo$ handle registering */
try {
SignatureAlgorithm.register(uri, javaClass);
LOG.debug("SignatureAlgorithm.register({}, {})", uri, javaClass);
} catch (ClassNotFoundException e) {
Object exArgs[] = { uri, javaClass };
LOG.error(I18n.translate("algorithm.classDoesNotExist", exArgs));
}
}
}
if ("ResourceResolvers".equals(tag)) {
Element[] resolverElem =
XMLUtils.selectNodes(el.getFirstChild(), CONF_NS, "Resolver");
for (Element element : resolverElem) {
String javaClass =
element.getAttributeNS(null, "JAVACLASS");
String description =
element.getAttributeNS(null, "DESCRIPTION");
if (description != null && description.length() > 0) {
LOG.debug("Register Resolver: {}: {}", javaClass, description);
} else {
LOG.debug("Register Resolver: {}: For unknown purposes", javaClass);
}
try {
ResourceResolver.register(javaClass);
} catch (Throwable e) {
LOG.warn(
"Cannot register:" + javaClass
+ " perhaps some needed jars are not installed",
e
);
}
}
}
if ("KeyResolver".equals(tag)){
Element[] resolverElem =
XMLUtils.selectNodes(el.getFirstChild(), CONF_NS, "Resolver");
List classNames = new ArrayList<>(resolverElem.length);
for (Element element : resolverElem) {
String javaClass =
element.getAttributeNS(null, "JAVACLASS");
String description =
element.getAttributeNS(null, "DESCRIPTION");
if (description != null && description.length() > 0) {
LOG.debug("Register Resolver: {}: {}", javaClass, description);
} else {
LOG.debug("Register Resolver: {}: For unknown purposes", javaClass);
}
classNames.add(javaClass);
}
KeyResolver.registerClassNames(classNames);
}
if ("PrefixMappings".equals(tag)){
LOG.debug("Now I try to bind prefixes:");
Element[] nl =
XMLUtils.selectNodes(el.getFirstChild(), CONF_NS, "PrefixMapping");
for (Element element : nl) {
String namespace = element.getAttributeNS(null, "namespace");
String prefix = element.getAttributeNS(null, "prefix");
LOG.debug("Now I try to bind {} to {}", prefix, namespace);
ElementProxy.setDefaultPrefix(namespace, prefix);
}
}
}
} catch (Exception e) {
LOG.error("Bad: ", e);
}
}
}
