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/*
* Copyright (c) 2015 Brocade Communications Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.aaa.shiro.filters;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import org.apache.shiro.codec.Base64;
import org.apache.shiro.web.filter.authc.BasicHttpAuthenticationFilter;
import org.apache.shiro.web.util.WebUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Extends <code>BasicHttpAuthenticationFilter</code> to include ability to
* authenticate OAuth2 tokens, which is needed for backwards compatibility with
* <code>TokenAuthFilter</code>.
*
* This behavior is enabled by default for backwards compatibility. To disable
* OAuth2 functionality, just comment out the following line from the
* <code>etc/shiro.ini</code> file:
* <code>authcBasic = org.opendaylight.aaa.shiro.filters.ODLHttpAuthenticationFilter</code>
* then restart the karaf container.
*
* @author Ryan Goulding (ryandgoulding@gmail.com)
*
*/
public class ODLHttpAuthenticationFilter extends BasicHttpAuthenticationFilter {
private static final Logger LOG = LoggerFactory.getLogger(ODLHttpAuthenticationFilter.class);
// defined in lower-case for more efficient string comparison
protected static final String BEARER_SCHEME = "bearer";
protected static final String OPTIONS_HEADER = "OPTIONS";
public ODLHttpAuthenticationFilter() {
super();
LOG.info("Creating the ODLHttpAuthenticationFilter");
}
@Override
protected String[] getPrincipalsAndCredentials(String scheme, String encoded) {
final String decoded = Base64.decodeToString(encoded);
// attempt to decode username/password; otherwise decode as token
if (decoded.contains(":")) {
return decoded.split(":");
}
return new String[] { encoded };
}
@Override
protected boolean isLoginAttempt(String authzHeader) {
final String authzScheme = getAuthzScheme().toLowerCase();
final String authzHeaderLowerCase = authzHeader.toLowerCase();
return authzHeaderLowerCase.startsWith(authzScheme)
|| authzHeaderLowerCase.startsWith(BEARER_SCHEME);
}
@Override
protected boolean isAccessAllowed(ServletRequest request, ServletResponse response,
Object mappedValue) {
final HttpServletRequest httpRequest = WebUtils.toHttp(request);
final String httpMethod = httpRequest.getMethod();
if (OPTIONS_HEADER.equalsIgnoreCase(httpMethod)) {
return true;
} else {
return super.isAccessAllowed(httpRequest, response, mappedValue);
}
}
}
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