diff --git a/components/ui-request-interceptor/io.entgra.device.mgt.core.ui.request.interceptor/src/main/java/io/entgra/device/mgt/core/ui/request/interceptor/DefaultOauth2TokenHandler.java b/components/ui-request-interceptor/io.entgra.device.mgt.core.ui.request.interceptor/src/main/java/io/entgra/device/mgt/core/ui/request/interceptor/DefaultOauth2TokenHandler.java new file mode 100644 index 00000000000..343a9c620db --- /dev/null +++ b/components/ui-request-interceptor/io.entgra.device.mgt.core.ui.request.interceptor/src/main/java/io/entgra/device/mgt/core/ui/request/interceptor/DefaultOauth2TokenHandler.java @@ -0,0 +1,170 @@ +/* + * Copyright (c) 2018 - 2023, Entgra (Pvt) Ltd. (http://www.entgra.io) All Rights Reserved. + * + * Entgra (Pvt) Ltd. licenses this file to you 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. + */ + +package io.entgra.device.mgt.core.ui.request.interceptor; + +import com.google.gson.Gson; +import com.google.gson.JsonElement; +import com.google.gson.JsonObject; +import com.google.gson.JsonParser; +import io.entgra.device.mgt.core.ui.request.interceptor.beans.AuthData; +import io.entgra.device.mgt.core.ui.request.interceptor.util.HandlerConstants; +import io.entgra.device.mgt.core.ui.request.interceptor.util.HandlerUtil; +import org.apache.commons.lang.StringUtils; +import org.apache.commons.logging.Log; +import org.apache.commons.logging.LogFactory; +import org.apache.http.HttpHeaders; +import org.apache.http.HttpStatus; +import org.apache.http.client.methods.HttpGet; +import org.apache.http.client.utils.URIBuilder; +import org.apache.http.entity.ContentType; +import io.entgra.device.mgt.core.ui.request.interceptor.beans.ProxyResponse; + +import javax.servlet.annotation.MultipartConfig; +import javax.servlet.annotation.WebServlet; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; +import javax.servlet.http.HttpSession; +import java.io.IOException; + +@MultipartConfig +@WebServlet("/default-oauth2-credentials") +public class DefaultOauth2TokenHandler extends HttpServlet { + private static final Log log = LogFactory.getLog(DefaultTokenHandler.class); + + + @Override + protected void doGet(HttpServletRequest req, HttpServletResponse resp) { + try { + HttpSession httpSession = req.getSession(false); + + if (httpSession != null) { + AuthData authData = (AuthData) httpSession.getAttribute(HandlerConstants.SESSION_AUTH_DATA_KEY); + if (authData == null) { + HandlerUtil.sendUnAuthorizeResponse(resp); + return; + } + + AuthData defaultAuthData = (AuthData) httpSession + .getAttribute(HandlerConstants.SESSION_DEFAULT_AUTH_DATA_KEY); + if (defaultAuthData != null) { + HandlerUtil.handleSuccess(resp, constructSuccessProxyResponse(defaultAuthData.getAccessToken())); + return; + } + + String clientId = authData.getClientId(); + String clientSecret = authData.getClientSecret(); + + String queryString = req.getQueryString(); + String scopeString = ""; + if (StringUtils.isNotEmpty(queryString)) { + scopeString = req.getParameter("scopes"); + if (scopeString != null) { + scopeString = "?scopes=" + scopeString; + } + } + + String iotsCoreUrl = req.getScheme() + HandlerConstants.SCHEME_SEPARATOR + + System.getProperty(HandlerConstants.IOT_GW_HOST_ENV_VAR) + + HandlerConstants.COLON + HandlerUtil.getGatewayPort(req.getScheme()); + String tokenUrl = iotsCoreUrl + "/api/device-mgt/v1.0/devices/" + clientId + + "/" + clientSecret + "/default-token" + scopeString; + + HttpGet defaultTokenRequest = new HttpGet(tokenUrl); + defaultTokenRequest + .setHeader(HttpHeaders.AUTHORIZATION, HandlerConstants.BEARER + authData.getAccessToken()); + defaultTokenRequest + .setHeader(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_FORM_URLENCODED.toString()); + ProxyResponse tokenResultResponse = HandlerUtil.execute(defaultTokenRequest); + + if (tokenResultResponse.getExecutorResponse().contains(HandlerConstants.EXECUTOR_EXCEPTION_PREFIX)) { + log.error("Error occurred while invoking the API to get default token data."); + HandlerUtil.handleError(resp, tokenResultResponse); + return; + } + String tokenResult = tokenResultResponse.getData(); + if (tokenResult == null) { + log.error("Invalid default token response is received."); + HandlerUtil.handleError(resp, tokenResultResponse); + return; + } + + JsonParser jsonParser = new JsonParser(); + JsonElement jTokenResult = jsonParser.parse(tokenResult); + if (jTokenResult.isJsonObject()) { + JsonObject jTokenResultAsJsonObject = jTokenResult.getAsJsonObject(); + AuthData newDefaultAuthData = new AuthData(); + newDefaultAuthData.setClientId(clientId); + newDefaultAuthData.setClientSecret(clientSecret); + + String defaultToken = jTokenResultAsJsonObject.get("accessToken").getAsString(); + newDefaultAuthData.setAccessToken(defaultToken); + newDefaultAuthData.setRefreshToken(jTokenResultAsJsonObject.get("refreshToken").getAsString()); + newDefaultAuthData.setScope(jTokenResultAsJsonObject.get("scopes").getAsString()); + httpSession.setAttribute(HandlerConstants.SESSION_DEFAULT_AUTH_DATA_KEY, newDefaultAuthData); + + HandlerUtil.handleSuccess(resp, constructSuccessProxyResponse(defaultToken)); + } + } else { + HandlerUtil.sendUnAuthorizeResponse(resp); + } + } catch (IOException e) { + log.error("Error occurred when processing GET request to get default token.", e); + } + } + + /** + * Get Success Proxy Response + * @param defaultAccessToken Access token which has default scope + * @return {@link ProxyResponse} + */ + private ProxyResponse constructSuccessProxyResponse (String defaultAccessToken) { + + URIBuilder ub = new URIBuilder(); + ub.setScheme(HandlerConstants.WSS_PROTOCOL); + ub.setHost(System.getProperty(HandlerConstants.IOT_REMOTE_SESSION_HOST_ENV_VAR)); + ub.setPort(Integer.parseInt(System.getProperty(HandlerConstants.IOT_REMOTE_SESSION_HTTPS_PORT_ENV_VAR))); + ub.setPath(HandlerConstants.REMOTE_SESSION_CONTEXT); + + URIBuilder ub2 = new URIBuilder(); + ub2.setScheme(HandlerConstants.WSS_PROTOCOL); + ub2.setHost(System.getProperty(HandlerConstants.IOT_GW_HOST_ENV_VAR)); + ub2.setPort(Integer.parseInt(System.getProperty(HandlerConstants.IOT_GATEWAY_WEBSOCKET_WSS_PORT_ENV_VAR))); + + URIBuilder ub3 = new URIBuilder(); + ub3.setScheme(HandlerConstants.WS_PROTOCOL); + ub3.setHost(System.getProperty(HandlerConstants.IOT_GW_HOST_ENV_VAR)); + ub3.setPort(Integer.parseInt(System.getProperty(HandlerConstants.IOT_GATEWAY_WEBSOCKET_WS_PORT_ENV_VAR))); + + JsonObject responseJsonObj = new JsonObject(); + responseJsonObj.addProperty("default-access-token", defaultAccessToken); + responseJsonObj.addProperty("remote-session-base-url", ub.toString()); + responseJsonObj.addProperty("secured-websocket-gateway-url", ub2.toString()); + responseJsonObj.addProperty("unsecured-websocket-gateway-url", ub3.toString()); + + Gson gson = new Gson(); + String payload = gson.toJson(responseJsonObj); + + ProxyResponse proxyResponse = new ProxyResponse(); + proxyResponse.setCode(HttpStatus.SC_OK); + proxyResponse.setStatus(ProxyResponse.Status.SUCCESS); + proxyResponse.setData(payload); + return proxyResponse; + } +}