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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF 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 com.cloud.api;
import java.io.UnsupportedEncodingException;
import java.net.InetAddress;
import java.net.URLDecoder;
import java.net.UnknownHostException;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.inject.Inject;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.cloudstack.api.ApiConstants;
import org.apache.cloudstack.api.ApiErrorCode;
import org.apache.cloudstack.api.ApiServerService;
import org.apache.cloudstack.api.BaseCmd;
import org.apache.cloudstack.api.ServerApiException;
import org.apache.cloudstack.api.auth.APIAuthenticationManager;
import org.apache.cloudstack.api.auth.APIAuthenticationType;
import org.apache.cloudstack.api.auth.APIAuthenticator;
import org.apache.cloudstack.api.command.user.consoleproxy.CreateConsoleEndpointCmd;
import org.apache.cloudstack.context.CallContext;
import org.apache.cloudstack.managed.context.ManagedContext;
import org.apache.cloudstack.utils.consoleproxy.ConsoleAccessUtils;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.LogManager;
import org.jetbrains.annotations.Nullable;
import org.springframework.stereotype.Component;
import org.springframework.web.context.support.SpringBeanAutowiringSupport;
import com.cloud.api.auth.ListUserTwoFactorAuthenticatorProvidersCmd;
import com.cloud.api.auth.SetupUserTwoFactorAuthenticationCmd;
import com.cloud.api.auth.ValidateUserTwoFactorAuthenticationCodeCmd;
import com.cloud.projects.Project;
import com.cloud.projects.dao.ProjectDao;
import com.cloud.user.Account;
import com.cloud.user.AccountManagerImpl;
import com.cloud.user.AccountService;
import com.cloud.user.User;
import com.cloud.user.UserAccount;
import com.cloud.utils.HttpUtils;
import com.cloud.utils.StringUtils;
import com.cloud.utils.db.EntityManager;
import com.cloud.utils.net.NetUtils;
@Component("apiServlet")
public class ApiServlet extends HttpServlet {
protected static Logger LOGGER = LogManager.getLogger(ApiServlet.class);
private final static List<String> s_clientAddressHeaders = Collections
.unmodifiableList(Arrays.asList("X-Forwarded-For",
"HTTP_CLIENT_IP", "HTTP_X_FORWARDED_FOR", "Remote_Addr"));
private static final String REPLACEMENT = "_";
private static final String LOGGER_REPLACEMENTS = "[\n\r\t]";
@Inject
ApiServerService apiServer;
@Inject
AccountService accountMgr;
@Inject
EntityManager entityMgr;
@Inject
ManagedContext managedContext;
@Inject
APIAuthenticationManager authManager;
@Inject
private ProjectDao projectDao;
public ApiServlet() {
}
@Override
public void init(final ServletConfig config) throws ServletException {
SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this, config.getServletContext());
}
@Override
protected void doGet(final HttpServletRequest req, final HttpServletResponse resp) {
processRequest(req, resp);
}
@Override
protected void doPost(final HttpServletRequest req, final HttpServletResponse resp) {
processRequest(req, resp);
}
/**
* For HTTP GET requests, it seems that HttpServletRequest.getParameterMap() actually tries
* to unwrap URL encoded content from ISO-9959-1.
* After failed in using setCharacterEncoding() to control it, end up with following hacking:
* for all GET requests, we will override it with our-own way of UTF-8 based URL decoding.
* @param req request containing parameters
* @param params output of "our" map of parameters/values
*/
void utf8Fixup(final HttpServletRequest req, final Map<String, Object[]> params) {
if (req.getQueryString() == null) {
return;
}
final String[] paramsInQueryString = req.getQueryString().split("&");
if (paramsInQueryString != null) {
for (final String param : paramsInQueryString) {
final String[] paramTokens = param.split("=", 2);
if (paramTokens.length == 2) {
String name = decodeUtf8(paramTokens[0]);
String value = decodeUtf8(paramTokens[1]);
params.put(name, new String[] {value});
} else {
LOGGER.debug("Invalid parameter in URL found. param: " + param);
}
}
}
}
private String decodeUtf8(final String value) {
try {
return URLDecoder.decode(value, "UTF-8");
} catch (final UnsupportedEncodingException e) {
//should never happen
return null;
}
}
private void processRequest(final HttpServletRequest req, final HttpServletResponse resp) {
managedContext.runWithContext(new Runnable() {
@Override
public void run() {
processRequestInContext(req, resp);
}
});
}
private void checkSingleQueryParameterValue(Map<String, String[]> params) {
params.forEach((k, v) -> {
if (v.length > 1) {
String message = String.format("Query parameter '%s' has multiple values %s. Only the last value will be respected." +
"It is advised to pass only a single parameter", k, Arrays.toString(v));
LOGGER.warn(message);
}
});
}
void processRequestInContext(final HttpServletRequest req, final HttpServletResponse resp) {
InetAddress remoteAddress = null;
try {
remoteAddress = getClientAddress(req);
} catch (UnknownHostException e) {
LOGGER.warn("UnknownHostException when trying to lookup remote IP-Address. This should never happen. Blocking request.", e);
final String response = apiServer.getSerializedApiError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
"UnknownHostException when trying to lookup remote IP-Address", null,
HttpUtils.RESPONSE_TYPE_XML);
HttpUtils.writeHttpResponse(resp, response, HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
HttpUtils.RESPONSE_TYPE_XML, ApiServer.JSONcontentType.value());
return;
}
final StringBuilder auditTrailSb = new StringBuilder(128);
auditTrailSb.append(" ").append(remoteAddress.getHostAddress());
auditTrailSb.append(" -- ").append(req.getMethod()).append(' ');
// get the response format since we'll need it in a couple of places
String responseType = HttpUtils.RESPONSE_TYPE_XML;
final Map<String, Object[]> params = new HashMap<String, Object[]>();
Map<String, String[]> reqParams = req.getParameterMap();
checkSingleQueryParameterValue(reqParams);
params.putAll(reqParams);
utf8Fixup(req, params);
// logging the request start and end in management log for easy debugging
String reqStr = "";
String cleanQueryString = StringUtils.cleanString(req.getQueryString());
if (LOGGER.isDebugEnabled()) {
reqStr = auditTrailSb.toString() + " " + cleanQueryString;
LOGGER.debug("===START=== " + reqStr);
}
try {
resp.setContentType(HttpUtils.XML_CONTENT_TYPE);
HttpSession session = req.getSession(false);
if (LOGGER.isTraceEnabled()) {
LOGGER.trace(String.format("session found: %s", session));
}
final Object[] responseTypeParam = params.get(ApiConstants.RESPONSE);
if (responseTypeParam != null) {
responseType = (String)responseTypeParam[0];
}
final Object[] commandObj = params.get(ApiConstants.COMMAND);
final String command = commandObj == null ? null : (String) commandObj[0];
final Object[] userObj = params.get(ApiConstants.USERNAME);
String username = userObj == null ? null : (String)userObj[0];
if (LOGGER.isTraceEnabled()) {
String logCommand = saveLogString(command);
String logName = saveLogString(username);
LOGGER.trace(String.format("command %s processing for user \"%s\"",
logCommand,
logName));
}
if (command != null && !command.equals(ValidateUserTwoFactorAuthenticationCodeCmd.APINAME)) {
APIAuthenticator apiAuthenticator = authManager.getAPIAuthenticator(command);
if (apiAuthenticator != null) {
auditTrailSb.append("command=");
auditTrailSb.append(command);
int httpResponseCode = HttpServletResponse.SC_OK;
String responseString = null;
if (apiAuthenticator.getAPIType() == APIAuthenticationType.LOGIN_API) {
if (session != null) {
invalidateHttpSession(session, "invalidating session for login call");
}
session = req.getSession(true);
if (ApiServer.EnableSecureSessionCookie.value()) {
resp.setHeader("SET-COOKIE", String.format("JSESSIONID=%s;Secure;HttpOnly;Path=/client", session.getId()));
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Session cookie is marked secure!");
}
}
}
try {
if (LOGGER.isTraceEnabled()) {
LOGGER.trace(String.format("apiAuthenticator.authenticate(%s, params[%d], %s, %s, %s, %s, %s,%s)",
saveLogString(command), params.size(), session.getId(), remoteAddress.getHostAddress(), saveLogString(responseType), "auditTrailSb", "req", "resp"));
}
responseString = apiAuthenticator.authenticate(command, params, session, remoteAddress, responseType, auditTrailSb, req, resp);
if (session != null && session.getAttribute(ApiConstants.SESSIONKEY) != null) {
resp.addHeader("SET-COOKIE", String.format("%s=%s;HttpOnly", ApiConstants.SESSIONKEY, session.getAttribute(ApiConstants.SESSIONKEY)));
}
} catch (ServerApiException e) {
httpResponseCode = e.getErrorCode().getHttpCode();
responseString = e.getMessage();
LOGGER.debug("Authentication failure: " + e.getMessage());
}
if (apiAuthenticator.getAPIType() == APIAuthenticationType.LOGOUT_API) {
if (session != null) {
final Long userId = (Long) session.getAttribute("userid");
final Account account = (Account) session.getAttribute("accountobj");
Long accountId = null;
if (account != null) {
accountId = account.getId();
}
auditTrailSb.insert(0, "(userId=" + userId + " accountId=" + accountId + " sessionId=" + session.getId() + ")");
if (userId != null) {
apiServer.logoutUser(userId);
}
invalidateHttpSession(session, "invalidating session after logout call");
}
final Cookie[] cookies = req.getCookies();
if (cookies != null) {
for (final Cookie cookie : cookies) {
cookie.setValue("");
cookie.setMaxAge(0);
resp.addCookie(cookie);
}
}
}
HttpUtils.writeHttpResponse(resp, responseString, httpResponseCode, responseType, ApiServer.JSONcontentType.value());
return;
}
} else {
LOGGER.trace("no command available");
}
auditTrailSb.append(cleanQueryString);
final boolean isNew = ((session == null) ? true : session.isNew());
// Initialize an empty context and we will update it after we have verified the request below,
// we no longer rely on web-session here, verifyRequest will populate user/account information
// if a API key exists
if (isNew && LOGGER.isTraceEnabled()) {
LOGGER.trace(String.format("new session: %s", session));
}
if (!isNew && (command.equalsIgnoreCase(ValidateUserTwoFactorAuthenticationCodeCmd.APINAME) || (!skip2FAcheckForAPIs(command) && !skip2FAcheckForUser(session)))) {
LOGGER.debug("Verifying two factor authentication");
boolean success = verify2FA(session, command, auditTrailSb, params, remoteAddress, responseType, req, resp);
if (!success) {
LOGGER.debug("Verification of two factor authentication failed");
return;
}
}
Long userId = null;
if (!isNew) {
userId = (Long)session.getAttribute("userid");
final String account = (String) session.getAttribute("account");
final Object accountObj = session.getAttribute("accountobj");
if (account != null) {
if (invalidateHttpSessionIfNeeded(req, resp, auditTrailSb, responseType, params, session, account)) return;
} else {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("no account, this request will be validated through apikey(%s)/signature");
}
}
if (! requestChecksoutAsSane(resp, auditTrailSb, responseType, params, session, command, userId, account, accountObj))
return;
} else {
CallContext.register(accountMgr.getSystemUser(), accountMgr.getSystemAccount());
}
setProjectContext(params);
if (LOGGER.isTraceEnabled()) {
LOGGER.trace(String.format("verifying request for user %s from %s with %d parameters",
userId, remoteAddress.getHostAddress(), params.size()));
}
if (apiServer.verifyRequest(params, userId, remoteAddress)) {
auditTrailSb.insert(0, "(userId=" + CallContext.current().getCallingUserId() + " accountId=" + CallContext.current().getCallingAccount().getId() +
" sessionId=" + (session != null ? session.getId() : null) + ")");
// Add the HTTP method (GET/POST/PUT/DELETE) as well into the params map.
params.put("httpmethod", new String[]{req.getMethod()});
setProjectContext(params);
setClientAddressForConsoleEndpointAccess(command, params, req);
final String response = apiServer.handleRequest(params, responseType, auditTrailSb);
HttpUtils.writeHttpResponse(resp, response != null ? response : "", HttpServletResponse.SC_OK, responseType, ApiServer.JSONcontentType.value());
} else {
if (session != null) {
invalidateHttpSession(session, String.format("request verification failed for %s from %s", userId, remoteAddress.getHostAddress()));
}
auditTrailSb.append(" " + HttpServletResponse.SC_UNAUTHORIZED + " " + "unable to verify user credentials and/or request signature");
final String serializedResponse =
apiServer.getSerializedApiError(HttpServletResponse.SC_UNAUTHORIZED, "unable to verify user credentials and/or request signature", params,
responseType);
HttpUtils.writeHttpResponse(resp, serializedResponse, HttpServletResponse.SC_UNAUTHORIZED, responseType, ApiServer.JSONcontentType.value());
}
} catch (final ServerApiException se) {
final String serializedResponseText = apiServer.getSerializedApiError(se, params, responseType);
resp.setHeader("X-Description", se.getDescription());
HttpUtils.writeHttpResponse(resp, serializedResponseText, se.getErrorCode().getHttpCode(), responseType, ApiServer.JSONcontentType.value());
auditTrailSb.append(" " + se.getErrorCode() + " " + se.getDescription());
} catch (final Exception ex) {
LOGGER.error("unknown exception writing api response", ex);
auditTrailSb.append(" unknown exception writing api response");
} finally {
LOGGER.info(auditTrailSb.toString());
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("===END=== " + reqStr);
}
// cleanup user context to prevent from being peeked in other request context
CallContext.unregister();
}
}
private boolean checkIfAuthenticatorIsOf2FA(String command) {
boolean verify2FA = false;
APIAuthenticator apiAuthenticator = authManager.getAPIAuthenticator(command);
if (apiAuthenticator != null && apiAuthenticator.getAPIType().equals(APIAuthenticationType.LOGIN_2FA_API)) {
verify2FA = true;
} else {
verify2FA = false;
}
return verify2FA;
}
protected boolean skip2FAcheckForAPIs(String command) {
boolean skip2FAcheck = false;
if (command.equalsIgnoreCase(ApiConstants.LIST_IDPS)
|| command.equalsIgnoreCase(ApiConstants.LIST_APIS)
|| command.equalsIgnoreCase(ListUserTwoFactorAuthenticatorProvidersCmd.APINAME)
|| command.equalsIgnoreCase(SetupUserTwoFactorAuthenticationCmd.APINAME)) {
skip2FAcheck = true;
}
return skip2FAcheck;
}
protected boolean skip2FAcheckForUser(HttpSession session) {
boolean skip2FAcheck = false;
Long userId = (Long) session.getAttribute("userid");
boolean is2FAverified = (boolean) session.getAttribute(ApiConstants.IS_2FA_VERIFIED);
if (is2FAverified) {
LOGGER.debug(String.format("Two factor authentication is already verified for the user %d, so skipping", userId));
skip2FAcheck = true;
} else {
UserAccount userAccount = accountMgr.getUserAccountById(userId);
boolean is2FAenabled = userAccount.isUser2faEnabled();
if (is2FAenabled) {
skip2FAcheck = false;
} else {
Long domainId = userAccount.getDomainId();
boolean is2FAmandated = Boolean.TRUE.equals(AccountManagerImpl.enableUserTwoFactorAuthentication.valueIn(domainId)) && Boolean.TRUE.equals(AccountManagerImpl.mandateUserTwoFactorAuthentication.valueIn(domainId));
if (is2FAmandated) {
skip2FAcheck = false;
} else {
skip2FAcheck = true;
}
}
}
return skip2FAcheck;
}
protected boolean verify2FA(HttpSession session, String command, StringBuilder auditTrailSb, Map<String, Object[]> params,
InetAddress remoteAddress, String responseType, HttpServletRequest req, HttpServletResponse resp) {
boolean verify2FA = false;
if (command.equals(ValidateUserTwoFactorAuthenticationCodeCmd.APINAME)) {
APIAuthenticator apiAuthenticator = authManager.getAPIAuthenticator(command);
if (apiAuthenticator != null) {
String responseString = apiAuthenticator.authenticate(command, params, session, remoteAddress, responseType, auditTrailSb, req, resp);
session.setAttribute(ApiConstants.IS_2FA_VERIFIED, true);
HttpUtils.writeHttpResponse(resp, responseString, HttpServletResponse.SC_OK, responseType, ApiServer.JSONcontentType.value());
verify2FA = true;
} else {
LOGGER.error("Cannot find API authenticator while verifying 2FA");
auditTrailSb.append(" Cannot find API authenticator while verifying 2FA");
verify2FA = false;
}
} else {
// invalidate the session
Long userId = (Long) session.getAttribute("userid");
UserAccount userAccount = accountMgr.getUserAccountById(userId);
boolean is2FAenabled = userAccount.isUser2faEnabled();
String keyFor2fa = userAccount.getKeyFor2fa();
String providerFor2fa = userAccount.getUser2faProvider();
String errorMsg;
if (is2FAenabled) {
if (org.apache.commons.lang3.StringUtils.isEmpty(keyFor2fa) || org.apache.commons.lang3.StringUtils.isEmpty(providerFor2fa)) {
errorMsg = "Two factor authentication is mandated by admin, user needs to setup 2FA using setupUserTwoFactorAuthentication API and" +
" then verify 2FA using validateUserTwoFactorAuthenticationCode API before calling other APIs. Existing session is invalidated.";
} else {
errorMsg = "Two factor authentication 2FA is enabled but not verified, please verify 2FA using validateUserTwoFactorAuthenticationCode API before calling other APIs. Existing session is invalidated.";
}
} else {
// when (is2FAmandated) is true
errorMsg = "Two factor authentication is mandated by admin, user needs to setup 2FA using setupUserTwoFactorAuthentication API and" +
" then verify 2FA using validateUserTwoFactorAuthenticationCode API before calling other APIs. Existing session is invalidated.";
}
LOGGER.error(errorMsg);
invalidateHttpSession(session, String.format("Unable to process the API request for %s from %s due to %s", userId, remoteAddress.getHostAddress(), errorMsg));
auditTrailSb.append(" " + ApiErrorCode.UNAUTHORIZED2FA + " " + errorMsg);
final String serializedResponse = apiServer.getSerializedApiError(ApiErrorCode.UNAUTHORIZED2FA.getHttpCode(), "Unable to process the API request due to :" + errorMsg, params, responseType);
HttpUtils.writeHttpResponse(resp, serializedResponse, ApiErrorCode.UNAUTHORIZED2FA.getHttpCode(), responseType, ApiServer.JSONcontentType.value());
verify2FA = false;
}
return verify2FA;
}
protected void setClientAddressForConsoleEndpointAccess(String command, Map<String, Object[]> params, HttpServletRequest req) throws UnknownHostException {
if (org.apache.commons.lang3.StringUtils.isNotBlank(command) &&
command.equalsIgnoreCase(BaseCmd.getCommandNameByClass(CreateConsoleEndpointCmd.class))) {
InetAddress addr = getClientAddress(req);
String clientAddress = addr != null ? addr.getHostAddress() : null;
params.put(ConsoleAccessUtils.CLIENT_INET_ADDRESS_KEY, new String[] {clientAddress});
}
}
@Nullable
private String saveLogString(String stringToLog) {
return stringToLog == null ? null : stringToLog.replace(LOGGER_REPLACEMENTS, REPLACEMENT);
}
/**
* Do a sanity check here to make sure the user hasn't already been deleted
*/
private boolean requestChecksoutAsSane(HttpServletResponse resp, StringBuilder auditTrailSb, String responseType, Map<String, Object[]> params, HttpSession session, String command, Long userId, String account, Object accountObj) {
if ((userId != null) && (account != null) && (accountObj != null) && apiServer.verifyUser(userId)) {
if (command == null) {
LOGGER.info("missing command, ignoring request...");
auditTrailSb.append(" " + HttpServletResponse.SC_BAD_REQUEST + " " + "no command specified");
final String serializedResponse = apiServer.getSerializedApiError(HttpServletResponse.SC_BAD_REQUEST, "no command specified", params, responseType);
HttpUtils.writeHttpResponse(resp, serializedResponse, HttpServletResponse.SC_BAD_REQUEST, responseType, ApiServer.JSONcontentType.value());
return true;
}
final User user = entityMgr.findById(User.class, userId);
CallContext.register(user, (Account) accountObj);
} else {
invalidateHttpSession(session, "Invalidate the session to ensure we won't allow a request across management server restarts if the userId was serialized to the stored session");
auditTrailSb.append(" " + HttpServletResponse.SC_UNAUTHORIZED + " " + "unable to verify user credentials");
final String serializedResponse =
apiServer.getSerializedApiError(HttpServletResponse.SC_UNAUTHORIZED, "unable to verify user credentials", params, responseType);
HttpUtils.writeHttpResponse(resp, serializedResponse, HttpServletResponse.SC_UNAUTHORIZED, responseType, ApiServer.JSONcontentType.value());
return false;
}
return true;
}
private boolean invalidateHttpSessionIfNeeded(HttpServletRequest req, HttpServletResponse resp, StringBuilder auditTrailSb, String responseType, Map<String, Object[]> params, HttpSession session, String account) {
if (!HttpUtils.validateSessionKey(session, params, req.getCookies(), ApiConstants.SESSIONKEY)) {
String msg = String.format("invalidating session %s for account %s", session.getId(), account);
invalidateHttpSession(session, msg);
auditTrailSb.append(" " + HttpServletResponse.SC_UNAUTHORIZED + " " + "unable to verify user credentials");
final String serializedResponse =
apiServer.getSerializedApiError(HttpServletResponse.SC_UNAUTHORIZED, "unable to verify user credentials", params, responseType);
HttpUtils.writeHttpResponse(resp, serializedResponse, HttpServletResponse.SC_UNAUTHORIZED, responseType, ApiServer.JSONcontentType.value());
return true;
}
return false;
}
public static void invalidateHttpSession(HttpSession session, String msg) {
try {
if (LOGGER.isTraceEnabled()) {
LOGGER.trace(msg);
}
session.invalidate();
} catch (final IllegalStateException ise) {
if (LOGGER.isTraceEnabled()) {
LOGGER.trace(String.format("failed to invalidate session %s", session.getId()));
}
}
}
private void setProjectContext(Map<String, Object[]> requestParameters) {
final String[] command = (String[])requestParameters.get(ApiConstants.COMMAND);
if (command == null) {
LOGGER.info("missing command, ignoring request...");
return;
}
final String commandName = command[0];
CallContext.current().setApiName(commandName);
for (Map.Entry<String, Object[]> entry: requestParameters.entrySet()) {
if (entry.getKey().equals(ApiConstants.PROJECT_ID) || isSpecificAPI(commandName)) {
String projectId = null;
if (isSpecificAPI(commandName)) {
projectId = String.valueOf(requestParameters.entrySet().stream()
.filter(e -> e.getKey().equals(ApiConstants.ID))
.map(Map.Entry::getValue).findFirst().get()[0]);
} else {
projectId = String.valueOf(entry.getValue()[0]);
}
Project project = projectDao.findByUuid(projectId);
if (project != null) {
CallContext.current().setProject(project);
}
}
}
}
private boolean isSpecificAPI(String commandName) {
List<String> commands = Arrays.asList("suspendProject", "updateProject", "activateProject", "deleteProject");
if (commands.contains(commandName)) {
return true;
}
return false;
}
boolean doUseForwardHeaders() {
return Boolean.TRUE.equals(ApiServer.useForwardHeader.value());
}
String[] proxyNets() {
return ApiServer.proxyForwardList.value().split(",");
}
//This method will try to get login IP of user even if servlet is behind reverseProxy or loadBalancer
public InetAddress getClientAddress(final HttpServletRequest request) throws UnknownHostException {
String ip = null;
InetAddress pretender = InetAddress.getByName(request.getRemoteAddr());
if(doUseForwardHeaders()) {
if (NetUtils.isIpInCidrList(pretender, proxyNets())) {
for (String header : getClientAddressHeaders()) {
header = header.trim();
ip = getCorrectIPAddress(request.getHeader(header));
if (StringUtils.isNotBlank(ip)) {
LOGGER.debug(String.format("found ip %s in header %s ", ip, header));
break;
}
} // no address found in header so ip is blank and use remote addr
} // else not an allowed proxy address, ip is blank and use remote addr
}
if (StringUtils.isBlank(ip)) {
LOGGER.trace(String.format("no ip found in headers, returning remote address %s.", pretender.getHostAddress()));
return pretender;
}
return InetAddress.getByName(ip);
}
private String[] getClientAddressHeaders() {
return ApiServer.listOfForwardHeaders.value().split(",");
}
private static String getCorrectIPAddress(String ip) {
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
return null;
}
if(NetUtils.isValidIp4(ip) || NetUtils.isValidIp6(ip)) {
return ip;
}
//it could be possible to have multiple IPs in HTTP header, this happens if there are multiple proxy in between
//the client and the servlet, so parse the client IP
String[] ips = ip.split(",");
for(String i : ips) {
if(NetUtils.isValidIp4(i.trim()) || NetUtils.isValidIp6(i.trim())) {
return i.trim();
}
}
return null;
}
}