/*
* eGov suite of products aim to improve the internal efficiency,transparency,
* accountability and the service delivery of the government organizations.
*
* Copyright (C) <2015> eGovernments Foundation
*
* The updated version of eGov suite of products as by eGovernments Foundation
* is available at http://www.egovernments.org
*
* 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
* 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/ or
* http://www.gnu.org/licenses/gpl.html .
*
* In addition to the terms of the GPL license to be adhered to in using this
* program, the following additional terms are to be complied with:
*
* 1) All versions of this program, verbatim or modified must carry this
* Legal Notice.
*
* 2) Any misrepresentation of the origin of the material is prohibited. It
* is required that all modified versions of this material be marked in
* reasonable ways as different from the original version.
*
* 3) This license does not grant any rights to any user of the program
* with regards to rights under trademark law for use of the trade names
* or trademarks of eGovernments Foundation.
*
* In case of any queries, you can reach eGovernments Foundation at contact@egovernments.org.
*/
package org.egov.infra.security.utils;
import com.google.gson.GsonBuilder;
import net.tanesha.recaptcha.ReCaptchaImpl;
import net.tanesha.recaptcha.ReCaptchaResponse;
import org.apache.commons.io.IOUtils;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.egov.infra.config.properties.ApplicationProperties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import javax.servlet.http.HttpServletRequest;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
@Service
public class RecaptchaUtils {
private static final Logger LOG = LoggerFactory.getLogger(RecaptchaUtils.class);
private static final String RECAPTCHA_VERIFY_URL = "https://www.google.com/recaptcha/api/siteverify";
@Autowired
private ApplicationProperties applicationProperties;
public boolean captchaIsValid(final HttpServletRequest request) {
try {
if ("high".equals(applicationProperties.getProperty("captcha.strength"))) {
final HttpPost post = new HttpPost(RECAPTCHA_VERIFY_URL);
final List<NameValuePair> urlParameters = new ArrayList<NameValuePair>();
urlParameters.add(new BasicNameValuePair("secret", (String) request.getSession().getAttribute("siteSecret")));
urlParameters.add(new BasicNameValuePair("response", request.getParameter("g-recaptcha-response")));
urlParameters.add(new BasicNameValuePair("remoteip", request.getRemoteAddr()));
post.setEntity(new UrlEncodedFormEntity(urlParameters));
final String responseJson = IOUtils.toString(HttpClientBuilder.create().build().execute(post).getEntity().getContent(), Charset.defaultCharset());
return Boolean.valueOf(new GsonBuilder().create().fromJson(responseJson, HashMap.class).get("success").toString());
} else {
String remoteAddr = request.getRemoteAddr();
ReCaptchaImpl reCaptcha = new ReCaptchaImpl();
reCaptcha.setPrivateKey((String) request.getSession().getAttribute("siteSecret"));
String challenge = request.getParameter("recaptcha_challenge_field");
String uresponse = request.getParameter("recaptcha_response_field");
ReCaptchaResponse reCaptchaResponse = reCaptcha.checkAnswer(remoteAddr, challenge, uresponse);
return reCaptchaResponse.isValid();
}
} catch (Exception e) {
LOG.error("Recaptcha verification failed", e);
return false;
}
}
}