com.muk.services.processor.BasicAuthPrincipalProcessor.java Source code

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Here is the source code for com.muk.services.processor.BasicAuthPrincipalProcessor.java

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/*******************************************************************************
 * Copyright (C)  2018  mizuuenikaze inc
 *
 *     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, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     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, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
package com.muk.services.processor;

import java.nio.charset.StandardCharsets;
import java.util.List;

import javax.security.auth.Subject;

import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpHeaders;
import org.restlet.data.Header;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;

/**
 * Extracts Basic Auth header for camel
 */
public class BasicAuthPrincipalProcessor implements Processor {

    @Override
    public void process(Exchange exchange) throws Exception {
        @SuppressWarnings("unchecked")
        final List<Header> httpHeaders = exchange.getIn().getHeader("org.restlet.http.headers", List.class);

        String userpass = "bad:creds";
        for (final Header header : httpHeaders) {
            if (header.getName().toLowerCase().equals(HttpHeaders.AUTHORIZATION.toLowerCase())) {
                userpass = new String(Base64.decodeBase64(
                        (StringUtils.substringAfter(header.getValue(), " ").getBytes(StandardCharsets.UTF_8))),
                        StandardCharsets.UTF_8);
                break;
            }
        }

        final String[] tokens = userpass.split(":");

        // create an Authentication object
        // build a new bearer token type
        final UsernamePasswordAuthenticationToken authToken = new UsernamePasswordAuthenticationToken(tokens[0],
                tokens[1]);

        // wrap it in a Subject
        final Subject subject = new Subject();
        subject.getPrincipals().add(authToken);

        // place the Subject in the In message
        exchange.getIn().setHeader(Exchange.AUTHENTICATION, subject);
    }
}