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/*
* Copyright 2023 Daniel Raper (me@danr.uk)
*
* 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.
*/
package org.traccar.database;
import org.traccar.config.Config;
import org.traccar.config.Keys;
import org.traccar.api.resource.SessionResource;
import org.traccar.api.security.LoginService;
import org.traccar.model.User;
import org.traccar.storage.StorageException;
import org.traccar.helper.LogAction;
import org.traccar.helper.ServletHelper;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse.BodyHandlers;
import java.security.GeneralSecurityException;
import java.util.Map;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.inject.Inject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.nimbusds.oauth2.sdk.http.HTTPResponse;
import com.nimbusds.oauth2.sdk.AuthorizationCode;
import com.nimbusds.oauth2.sdk.ResponseType;
import com.nimbusds.oauth2.sdk.Scope;
import com.nimbusds.oauth2.sdk.AuthorizationGrant;
import com.nimbusds.oauth2.sdk.TokenRequest;
import com.nimbusds.oauth2.sdk.TokenResponse;
import com.nimbusds.oauth2.sdk.AuthorizationCodeGrant;
import com.nimbusds.oauth2.sdk.ParseException;
import com.nimbusds.oauth2.sdk.AuthorizationResponse;
import com.nimbusds.oauth2.sdk.auth.Secret;
import com.nimbusds.oauth2.sdk.auth.ClientSecretBasic;
import com.nimbusds.oauth2.sdk.auth.ClientAuthentication;
import com.nimbusds.oauth2.sdk.token.BearerAccessToken;
import com.nimbusds.oauth2.sdk.id.State;
import com.nimbusds.oauth2.sdk.id.ClientID;
import com.nimbusds.openid.connect.sdk.OIDCTokenResponse;
import com.nimbusds.openid.connect.sdk.OIDCTokenResponseParser;
import com.nimbusds.openid.connect.sdk.UserInfoResponse;
import com.nimbusds.openid.connect.sdk.UserInfoRequest;
import com.nimbusds.openid.connect.sdk.AuthenticationRequest;
import com.nimbusds.openid.connect.sdk.claims.UserInfo;
public class OpenIdProvider {
private static final Logger LOGGER = LoggerFactory.getLogger(OpenIdProvider.class);
private final Boolean force;
private final ClientID clientId;
private final ClientAuthentication clientAuth;
private URI callbackUrl;
private URI authUrl;
private URI tokenUrl;
private URI userInfoUrl;
private URI baseUrl;
private final String adminGroup;
private LoginService loginService;
@Inject
public OpenIdProvider(Config config, LoginService loginService) {
this.loginService = loginService;
force = config.getBoolean(Keys.OPENID_FORCE);
clientId = new ClientID(config.getString(Keys.OPENID_CLIENTID));
clientAuth = new ClientSecretBasic(clientId, new Secret(config.getString(Keys.OPENID_CLIENTSECRET)));
try {
callbackUrl = new URI(config.getString(Keys.WEB_URL, "") + "/api/session/openid/callback");
baseUrl = new URI(config.getString(Keys.WEB_URL, ""));
if (
config.hasKey(Keys.OPENID_ISSUERURL)
&& (
!config.hasKey(Keys.OPENID_AUTHURL)
|| !config.hasKey(Keys.OPENID_TOKENURL)
|| !config.hasKey(Keys.OPENID_USERINFOURL))
) {
HttpClient httpClient = HttpClient.newHttpClient();
HttpRequest httpRequest = HttpRequest.newBuilder(
URI.create(
config.getString(Keys.OPENID_ISSUERURL) + "/.well-known/openid-configuration")
)
.header("accept", "application/json")
.build();
String httpResponse = httpClient.send(httpRequest, BodyHandlers.ofString()).body();
Map<String, Object> discoveryMap = new ObjectMapper().readValue(
httpResponse, new TypeReference<Map<String, Object>>() { });
authUrl = new URI(discoveryMap.get("authorization_endpoint").toString());
tokenUrl = new URI(discoveryMap.get("token_endpoint").toString());
userInfoUrl = new URI(discoveryMap.get("userinfo_endpoint").toString());
LOGGER.info("OpenID Connect auto discovery successful");
} else {
authUrl = new URI(config.getString(Keys.OPENID_AUTHURL));
tokenUrl = new URI(config.getString(Keys.OPENID_TOKENURL));
userInfoUrl = new URI(config.getString(Keys.OPENID_USERINFOURL));
}
} catch (URISyntaxException error) {
LOGGER.error("Invalid URIs provided in OpenID configuration");
} catch (InterruptedException | IOException error) {
LOGGER.error("OpenID Connect auto discovery failed");
}
adminGroup = config.getString(Keys.OPENID_ADMINGROUP);
}
public URI createAuthUri() {
Scope scope = new Scope("openid", "profile", "email");
if (adminGroup != null) {
scope.add("groups");
}
AuthenticationRequest.Builder request = new AuthenticationRequest.Builder(
new ResponseType("code"),
scope,
clientId,
callbackUrl);
return request.endpointURI(authUrl)
.state(new State())
.build()
.toURI();
}
private OIDCTokenResponse getToken(
AuthorizationCode code) throws IOException, ParseException, GeneralSecurityException {
AuthorizationGrant codeGrant = new AuthorizationCodeGrant(code, callbackUrl);
TokenRequest tokenRequest = new TokenRequest(tokenUrl, clientAuth, codeGrant);
HTTPResponse tokenResponse = tokenRequest.toHTTPRequest().send();
TokenResponse token = OIDCTokenResponseParser.parse(tokenResponse);
if (!token.indicatesSuccess()) {
throw new GeneralSecurityException("Unable to authenticate with the OpenID Connect provider.");
}
return (OIDCTokenResponse) token.toSuccessResponse();
}
private UserInfo getUserInfo(BearerAccessToken token) throws IOException, ParseException, GeneralSecurityException {
HTTPResponse httpResponse = new UserInfoRequest(userInfoUrl, token)
.toHTTPRequest()
.send();
UserInfoResponse userInfoResponse = UserInfoResponse.parse(httpResponse);
if (!userInfoResponse.indicatesSuccess()) {
throw new GeneralSecurityException(
"Failed to access OpenID Connect user info endpoint. Please contact your administrator.");
}
return userInfoResponse.toSuccessResponse().getUserInfo();
}
public URI handleCallback(
URI requestUri, HttpServletRequest request
) throws StorageException, ParseException, IOException, GeneralSecurityException {
AuthorizationResponse response = AuthorizationResponse.parse(requestUri);
if (!response.indicatesSuccess()) {
throw new GeneralSecurityException(response.toErrorResponse().getErrorObject().getDescription());
}
AuthorizationCode authCode = response.toSuccessResponse().getAuthorizationCode();
if (authCode == null) {
throw new GeneralSecurityException("Malformed OpenID callback.");
}
OIDCTokenResponse tokens = getToken(authCode);
BearerAccessToken bearerToken = tokens.getOIDCTokens().getBearerAccessToken();
UserInfo userInfo = getUserInfo(bearerToken);
Boolean administrator = adminGroup != null && userInfo.getStringListClaim("groups").contains(adminGroup);
User user = loginService.login(userInfo.getEmailAddress(), userInfo.getName(), administrator);
request.getSession().setAttribute(SessionResource.USER_ID_KEY, user.getId());
LogAction.login(user.getId(), ServletHelper.retrieveRemoteAddress(request));
return baseUrl;
}
public boolean getForce() {
return force;
}
}
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