/*
* 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.catalina.realm;
import java.io.File;
import java.io.IOException;
import java.security.Principal;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import javax.security.auth.Subject;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.TextInputCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.auth.login.FailedLoginException;
import javax.security.auth.login.LoginException;
import javax.security.auth.spi.LoginModule;
import org.apache.catalina.Context;
import org.apache.catalina.Realm;
import org.apache.catalina.connector.Request;
import org.apache.catalina.deploy.SecurityConstraint;
import org.apache.catalina.util.RequestUtil;
import org.apache.catalina.util.StringManager;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.digester.Digester;
/**
* <p>Implementation of the JAAS <strong>LoginModule</strong> interface,
* primarily for use in testing <code>JAASRealm</code>. It utilizes an
* XML-format data file of username/password/role information identical to
* that supported by <code>org.apache.catalina.realm.MemoryRealm</code>
* (except that digested passwords are not supported).</p>
*
* <p>This class recognizes the following string-valued options, which are
* specified in the configuration file (and passed to our constructor in
* the <code>options</code> argument:</p>
* <ul>
* <li><strong>debug</strong> - Set to "true" to get debugging messages
* generated to System.out. The default value is <code>false</code>.</li>
* <li><strong>pathname</strong> - Relative (to the pathname specified by the
* "catalina.base" system property) or absolute pahtname to the
* XML file containing our user information, in the format supported by
* {@link MemoryRealm}. The default value matches the MemoryRealm
* default.</li>
* </ul>
*
* <p><strong>IMPLEMENTATION NOTE</strong> - This class implements
* <code>Realm</code> only to satisfy the calling requirements of the
* <code>GenericPrincipal</code> constructor. It does not actually perform
* the functionality required of a <code>Realm</code> implementation.</p>
*
* @author Craig R. McClanahan
*
*/
public class JAASMemoryLoginModule extends MemoryRealm implements LoginModule, Realm {
// We need to extend MemoryRealm to avoid class cast
private static Log log = LogFactory.getLog(JAASMemoryLoginModule.class);
// ----------------------------------------------------- Instance Variables
/**
* The callback handler responsible for answering our requests.
*/
protected CallbackHandler callbackHandler = null;
/**
* Has our own <code>commit()</code> returned successfully?
*/
protected boolean committed = false;
/**
* The configuration information for this <code>LoginModule</code>.
*/
protected Map options = null;
/**
* The absolute or relative pathname to the XML configuration file.
*/
protected String pathname = "conf/tomcat-users.xml";
/**
* The <code>Principal</code> identified by our validation, or
* <code>null</code> if validation falied.
*/
protected Principal principal = null;
/**
* The set of <code>Principals</code> loaded from our configuration file.
*/
protected HashMap principals = new HashMap();
/**
* The string manager for this package.
*/
protected static StringManager sm =
StringManager.getManager(Constants.Package);
/**
* The state information that is shared with other configured
* <code>LoginModule</code> instances.
*/
protected Map sharedState = null;
/**
* The subject for which we are performing authentication.
*/
protected Subject subject = null;
// --------------------------------------------------------- Public Methods
public JAASMemoryLoginModule() {
log.debug("MEMORY LOGIN MODULE");
}
/**
* Phase 2 of authenticating a <code>Subject</code> when Phase 1
* fails. This method is called if the <code>LoginContext</code>
* failed somewhere in the overall authentication chain.
*
* @return <code>true</code> if this method succeeded, or
* <code>false</code> if this <code>LoginModule</code> should be
* ignored
*
* @exception LoginException if the abort fails
*/
public boolean abort() throws LoginException {
// If our authentication was not successful, just return false
if (principal == null)
return (false);
// Clean up if overall authentication failed
if (committed)
logout();
else {
committed = false;
principal = null;
}
log.debug("Abort");
return (true);
}
/**
* Phase 2 of authenticating a <code>Subject</code> when Phase 1
* was successful. This method is called if the <code>LoginContext</code>
* succeeded in the overall authentication chain.
*
* @return <code>true</code> if the authentication succeeded, or
* <code>false</code> if this <code>LoginModule</code> should be
* ignored
*
* @exception LoginException if the commit fails
*/
public boolean commit() throws LoginException {
log.debug("commit " + principal);
// If authentication was not successful, just return false
if (principal == null)
return (false);
// Add our Principal to the Subject if needed
if (!subject.getPrincipals().contains(principal)) {
subject.getPrincipals().add(principal);
// Add the roles as additional sudjucts as per the contract with the
// JAASRealm
if (principal instanceof GenericPrincipal) {
String roles[] = ((GenericPrincipal) principal).getRoles();
for (int i = 0; i < roles.length; i++) {
subject.getPrincipals().add(
new GenericPrincipal(null, roles[i], null));
}
}
}
committed = true;
return (true);
}
/**
* Return the SecurityConstraints configured to guard the request URI for
* this request, or <code>null</code> if there is no such constraint.
*
* @param request Request we are processing
* @param context Context the Request is mapped to
*/
public SecurityConstraint [] findSecurityConstraints(Request request,
Context context) {
ArrayList<SecurityConstraint> results = null;
// Are there any defined security constraints?
SecurityConstraint constraints[] = context.findConstraints();
if ((constraints == null) || (constraints.length == 0)) {
if (context.getLogger().isDebugEnabled())
context.getLogger().debug(" No applicable constraints defined");
return (null);
}
// Check each defined security constraint
String uri = request.getDecodedRequestURI();
String contextPath = request.getContextPath();
if (contextPath.length() > 0)
uri = uri.substring(contextPath.length());
uri = RequestUtil.URLDecode(uri); // Before checking constraints
String method = request.getMethod();
for (int i = 0; i < constraints.length; i++) {
if (context.getLogger().isDebugEnabled())
context.getLogger().debug(" Checking constraint '" + constraints[i] +
"' against " + method + " " + uri + " --> " +
constraints[i].included(uri, method));
if (constraints[i].included(uri, method)) {
if(results == null) {
results = new ArrayList<SecurityConstraint>();
}
results.add(constraints[i]);
}
}
// No applicable security constraint was found
if (context.getLogger().isDebugEnabled())
context.getLogger().debug(" No applicable constraint located");
if(results == null)
return null;
SecurityConstraint [] array = new SecurityConstraint[results.size()];
System.arraycopy(results.toArray(), 0, array, 0, array.length);
return array;
}
/**
* Initialize this <code>LoginModule</code> with the specified
* configuration information.
*
* @param subject The <code>Subject</code> to be authenticated
* @param callbackHandler A <code>CallbackHandler</code> for communicating
* with the end user as necessary
* @param sharedState State information shared with other
* <code>LoginModule</code> instances
* @param options Configuration information for this specific
* <code>LoginModule</code> instance
*/
public void initialize(Subject subject, CallbackHandler callbackHandler,
Map sharedState, Map options) {
log.debug("Init");
// Save configuration values
this.subject = subject;
this.callbackHandler = callbackHandler;
this.sharedState = sharedState;
this.options = options;
// Perform instance-specific initialization
if (options.get("pathname") != null)
this.pathname = (String) options.get("pathname");
// Load our defined Principals
load();
}
/**
* Phase 1 of authenticating a <code>Subject</code>.
*
* @return <code>true</code> if the authentication succeeded, or
* <code>false</code> if this <code>LoginModule</code> should be
* ignored
*
* @exception LoginException if the authentication fails
*/
public boolean login() throws LoginException {
// Set up our CallbackHandler requests
if (callbackHandler == null)
throw new LoginException("No CallbackHandler specified");
Callback callbacks[] = new Callback[9];
callbacks[0] = new NameCallback("Username: ");
callbacks[1] = new PasswordCallback("Password: ", false);
callbacks[2] = new TextInputCallback("nonce");
callbacks[3] = new TextInputCallback("nc");
callbacks[4] = new TextInputCallback("cnonce");
callbacks[5] = new TextInputCallback("qop");
callbacks[6] = new TextInputCallback("realmName");
callbacks[7] = new TextInputCallback("md5a2");
callbacks[8] = new TextInputCallback("authMethod");
// Interact with the user to retrieve the username and password
String username = null;
String password = null;
String nonce = null;
String nc = null;
String cnonce = null;
String qop = null;
String realmName = null;
String md5a2 = null;
String authMethod = null;
try {
callbackHandler.handle(callbacks);
username = ((NameCallback) callbacks[0]).getName();
password =
new String(((PasswordCallback) callbacks[1]).getPassword());
nonce = ((TextInputCallback) callbacks[2]).getText();
nc = ((TextInputCallback) callbacks[3]).getText();
cnonce = ((TextInputCallback) callbacks[4]).getText();
qop = ((TextInputCallback) callbacks[5]).getText();
realmName = ((TextInputCallback) callbacks[6]).getText();
md5a2 = ((TextInputCallback) callbacks[7]).getText();
authMethod = ((TextInputCallback) callbacks[8]).getText();
} catch (IOException e) {
throw new LoginException(e.toString());
} catch (UnsupportedCallbackException e) {
throw new LoginException(e.toString());
}
// Validate the username and password we have received
if (authMethod == null) {
// BASIC or FORM
principal = super.authenticate(username, password);
} else if (authMethod.equals(org.apache.catalina.authenticator.Constants.DIGEST_METHOD)) {
principal = super.authenticate(username, password, nonce, nc,
cnonce, qop, realmName, md5a2);
} else if (authMethod.equals(org.apache.catalina.authenticator.Constants.CERT_METHOD)) {
principal = super.getPrincipal(username);
} else {
throw new LoginException("Unknown authentication method");
}
log.debug("login " + username + " " + principal);
// Report results based on success or failure
if (principal != null) {
return (true);
} else {
throw new
FailedLoginException("Username or password is incorrect");
}
}
/**
* Log out this user.
*
* @return <code>true</code> in all cases because thie
* <code>LoginModule</code> should not be ignored
*
* @exception LoginException if logging out failed
*/
public boolean logout() throws LoginException {
subject.getPrincipals().remove(principal);
committed = false;
principal = null;
return (true);
}
// ---------------------------------------------------------- Realm Methods
// ------------------------------------------------------ Protected Methods
/**
* Load the contents of our configuration file.
*/
protected void load() {
// Validate the existence of our configuration file
File file = new File(pathname);
if (!file.isAbsolute())
file = new File(System.getProperty("catalina.base"), pathname);
if (!file.exists() || !file.canRead()) {
log.warn("Cannot load configuration file " + file.getAbsolutePath());
return;
}
// Load the contents of our configuration file
Digester digester = new Digester();
digester.setValidating(false);
digester.addRuleSet(new MemoryRuleSet());
try {
digester.push(this);
digester.parse(file);
} catch (Exception e) {
log.warn("Error processing configuration file " +
file.getAbsolutePath(), e);
return;
} finally {
digester.reset();
}
}
}