/*
* JBoss, Home of Professional Open Source.
* Copyright 2013 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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 io.undertow.security.impl;
import io.undertow.security.api.AuthenticationMechanism;
import io.undertow.security.api.AuthenticationMechanismFactory;
import io.undertow.security.api.SecurityContext;
import io.undertow.security.idm.Account;
import io.undertow.security.idm.Credential;
import io.undertow.security.idm.IdentityManager;
import io.undertow.security.idm.X509CertificateCredential;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.RenegotiationRequiredException;
import io.undertow.server.SSLSessionInfo;
import io.undertow.server.handlers.form.FormParserFactory;
import org.xnio.SslClientAuthMode;
import javax.net.ssl.SSLPeerUnverifiedException;
import java.io.IOException;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.util.Map;
/**
* The Client Cert based authentication mechanism.
* <p/>
* When authenticate is called the current request is checked to see if it a SSL request, this is further checked to identify if
* the client has been verified at the SSL level.
*
* @author <a href="mailto:darran.lofthouse@jboss.com">Darran Lofthouse</a>
*/
public class ClientCertAuthenticationMechanism implements AuthenticationMechanism {
public static final String FORCE_RENEGOTIATION = "force_renegotiation";
private final String name;
/**
* If we should force a renegotiation if client certs were not supplied. <code>true</code> by default
*/
private final boolean forceRenegotiation;
public static final Factory FACTORY = new Factory();
public ClientCertAuthenticationMechanism() {
this(true);
}
public ClientCertAuthenticationMechanism(boolean forceRenegotiation) {
this("CLIENT_CERT", forceRenegotiation);
}
public ClientCertAuthenticationMechanism(final String mechanismName) {
this(mechanismName, true);
}
public ClientCertAuthenticationMechanism(final String mechanismName, boolean forceRenegotiation) {
this.name = mechanismName;
this.forceRenegotiation = forceRenegotiation;
}
public AuthenticationMechanismOutcome authenticate(final HttpServerExchange exchange, final SecurityContext securityContext) {
SSLSessionInfo sslSession = exchange.getConnection().getSslSessionInfo();
if (sslSession != null) {
try {
Certificate[] clientCerts = getPeerCertificates(exchange, sslSession, securityContext);
if (clientCerts[0] instanceof X509Certificate) {
Credential credential = new X509CertificateCredential((X509Certificate) clientCerts[0]);
IdentityManager idm = securityContext.getIdentityManager();
Account account = idm.verify(credential);
if (account != null) {
securityContext.authenticationComplete(account, name, false);
return AuthenticationMechanismOutcome.AUTHENTICATED;
}
}
} catch (SSLPeerUnverifiedException e) {
// No action - this mechanism can not attempt authentication without peer certificates so allow it to drop out
// to NOT_ATTEMPTED.
}
}
/*
* For ClientCert we do not have a concept of a failed authentication, if the client did use a key then it was deemed
* acceptable for the connection to be established, this mechanism then just 'attempts' to use it for authentication but
* does not mandate success.
*/
return AuthenticationMechanismOutcome.NOT_ATTEMPTED;
}
private Certificate[] getPeerCertificates(final HttpServerExchange exchange, SSLSessionInfo sslSession, SecurityContext securityContext) throws SSLPeerUnverifiedException {
try {
return sslSession.getPeerCertificates();
} catch (RenegotiationRequiredException e) {
//we only renegotiate if authentication is required
if (forceRenegotiation && securityContext.isAuthenticationRequired()) {
try {
sslSession.renegotiate(exchange, SslClientAuthMode.REQUESTED);
return sslSession.getPeerCertificates();
} catch (IOException e1) {
//ignore
} catch (RenegotiationRequiredException e1) {
//ignore
}
}
}
throw new SSLPeerUnverifiedException("");
}
@Override
public ChallengeResult sendChallenge(HttpServerExchange exchange, SecurityContext securityContext) {
return new ChallengeResult(false);
}
private static final class Factory implements AuthenticationMechanismFactory {
@Override
public AuthenticationMechanism create(String mechanismName, FormParserFactory formParserFactory, Map<String, String> properties) {
String forceRenegotiation = properties.get(FORCE_RENEGOTIATION);
return new ClientCertAuthenticationMechanism(mechanismName, forceRenegotiation == null ? true : "true".equals(forceRenegotiation));
}
}
}