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//--- BEGIN COPYRIGHT BLOCK ---
//This program is free software; you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation; version 2 of the License.
//
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//GNU General Public License for more details.
//
//You should have received a copy of the GNU General Public License along
//with this program; if not, write to the Free Software Foundation, Inc.,
//51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
//(C) 2012 Red Hat, Inc.
//All rights reserved.
//--- END COPYRIGHT BLOCK ---
package com.netscape.certsrv.acls;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.security.Principal;
import java.util.Properties;
import javax.servlet.ServletContext;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.SecurityContext;
import javax.ws.rs.ext.Provider;
import org.jboss.resteasy.annotations.interception.Precedence;
import org.jboss.resteasy.annotations.interception.ServerInterceptor;
import org.jboss.resteasy.core.ResourceMethod;
import org.jboss.resteasy.core.ServerResponse;
import org.jboss.resteasy.spi.Failure;
import org.jboss.resteasy.spi.HttpRequest;
import org.jboss.resteasy.spi.interception.PreProcessInterceptor;
import com.netscape.certsrv.apps.CMS;
import com.netscape.certsrv.authentication.IAuthToken;
import com.netscape.certsrv.authorization.AuthzToken;
import com.netscape.certsrv.authorization.EAuthzAccessDenied;
import com.netscape.certsrv.authorization.IAuthzSubsystem;
import com.netscape.certsrv.base.EBaseException;
import com.netscape.certsrv.base.ForbiddenException;
import com.netscape.cmscore.realm.PKIPrincipal;
/**
* @author Endi S. Dewata
*/
@Provider
@ServerInterceptor
@Precedence("SECURITY")
public class ACLInterceptor implements PreProcessInterceptor {
Properties aclProperties;
@Context
ServletContext servletContext;
@Context
SecurityContext securityContext;
public synchronized void loadACLProperties() throws IOException {
if (aclProperties != null) return;
URL url = servletContext.getResource("/WEB-INF/acl.properties");
aclProperties = new Properties();
aclProperties.load(url.openStream());
}
@Override
public ServerResponse preProcess(
HttpRequest request,
ResourceMethod resourceMethod
) throws Failure, ForbiddenException {
// Get ACL mapping for the method.
Method method = resourceMethod.getMethod();
ACLMapping aclMapping = method.getAnnotation(ACLMapping.class);
// If not available, get ACL mapping for the class.
if (aclMapping == null) {
Class<?> clazz = method.getDeclaringClass();
aclMapping = clazz.getAnnotation(ACLMapping.class);
}
// If still not available, it's unprotected, allow request.
if (aclMapping == null) return null;
Principal principal = securityContext.getUserPrincipal();
// If unauthenticated, reject request.
if (principal == null) {
throw new ForbiddenException("No user principal provided.");
}
// If unrecognized principal, reject request.
if (!(principal instanceof PKIPrincipal)) {
throw new ForbiddenException("Invalid user principal");
}
PKIPrincipal pkiPrincipal = (PKIPrincipal)principal;
IAuthToken authToken = pkiPrincipal.getAuthToken();
// If missing auth token, reject request.
if (authToken == null) {
throw new ForbiddenException("No authorization token present.");
}
try {
loadACLProperties();
String name = aclMapping.value();
String value = aclProperties.getProperty(name);
// If no property defined, allow request.
if (value == null) return null;
String values[] = value.split(",");
// If invalid mapping, reject request.
if (values.length != 2) {
throw new ForbiddenException("Invalid ACL mapping.");
}
// Check authorization.
IAuthzSubsystem mAuthz = (IAuthzSubsystem) CMS.getSubsystem(CMS.SUBSYSTEM_AUTHZ);
AuthzToken authzToken = mAuthz.authorize(
"DirAclAuthz",
authToken,
values[0], // resource
values[1]); // operation
// If not authorized, reject request.
if (authzToken == null) {
throw new ForbiddenException("No authorization token present.");
}
} catch (EAuthzAccessDenied e) {
throw new ForbiddenException(e.toString());
} catch (IOException|EBaseException e) {
e.printStackTrace();
throw new Failure(e);
}
// Allow request.
return null;
}
}
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