info.rmapproject.api.auth.AuthenticationInterceptor.java Source code

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Here is the source code for info.rmapproject.api.auth.AuthenticationInterceptor.java

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/*******************************************************************************
 * Copyright 2016 Johns Hopkins University
 *
 * 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.
 *
 * This software was produced as part of the RMap Project (http://rmap-project.info),
 * The RMap Project was funded by the Alfred P. Sloan Foundation and is a 
 * collaboration between Data Conservancy, Portico, and IEEE.
 *******************************************************************************/
package info.rmapproject.api.auth;

import info.rmapproject.api.exception.ErrorCode;
import info.rmapproject.api.exception.RMapApiException;
import info.rmapproject.api.exception.RMapApiExceptionHandler;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.HttpMethod;
import javax.ws.rs.core.Response;

import org.apache.cxf.configuration.security.AuthorizationPolicy;
import org.apache.cxf.message.Message;
import org.apache.cxf.phase.AbstractPhaseInterceptor;
import org.apache.cxf.phase.Phase;
import org.springframework.beans.factory.annotation.Autowired;

/**
 * Intercepts interactions with the API to authenticate the user and 
 * verify they are authorized to access the API.
 *
 * @author khanson
 */
public class AuthenticationInterceptor extends AbstractPhaseInterceptor<Message> {

    /** The API User Service. */
    private ApiUserService apiUserService;

    /**
     * Autowired from Spring configuration - sets ApiUserService class.
     *
     * @param apiUserService the API User Service from spring config
     * @throws RMapApiException the RMap API Exception
     */
    @Autowired
    public void setApiUserService(ApiUserService apiUserService) throws RMapApiException {
        if (apiUserService == null) {
            throw new RMapApiException(ErrorCode.ER_FAILED_TO_INIT_API_USER_SERVICE);
        } else {
            this.apiUserService = apiUserService;
        }
    }

    /**
     * Instantiates a new Authentication Interceptor.
     */
    public AuthenticationInterceptor() {
        super(Phase.RECEIVE);
    }

    /**
     * Gets basic authentication information from request and validates key
     * throws an error if key is invalid.
     *
     * @param message http message
     */
    public void handleMessage(Message message) {

        try {
            //only authenticate if you are trying to write to the db... 
            HttpServletRequest req = (HttpServletRequest) message.get("HTTP.REQUEST");
            String method = req.getMethod();

            if (method != HttpMethod.GET && method != HttpMethod.OPTIONS && method != HttpMethod.HEAD) {

                AuthorizationPolicy policy = apiUserService.getCurrentAuthPolicy();
                String accessKey = policy.getUserName();
                String secret = policy.getPassword();

                if (accessKey == null || accessKey.length() == 0 || secret == null || secret.length() == 0) {
                    throw new RMapApiException(ErrorCode.ER_NO_USER_TOKEN_PROVIDED);
                }

                apiUserService.validateKey(accessKey, secret);
            }

        } catch (RMapApiException ex) {
            //generate a response to intercept default message
            RMapApiExceptionHandler exceptionhandler = new RMapApiExceptionHandler();
            Response response = exceptionhandler.toResponse(ex);
            message.getExchange().put(Response.class, response);
        }

    }

}