1 files changed, 183 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/database/OpenIdProvider.java b/src/main/java/org/traccar/database/OpenIdProvider.java
new file mode 100644
index 000000000..fc1409d14
--- /dev/null
+++ b/src/main/java/org/traccar/database/OpenIdProvider.java
@@ -0,0 +1,183 @@
+/*
+ * 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.io.IOException;
+import javax.servlet.http.HttpServletRequest;
+import javax.ws.rs.WebApplicationException;
+import javax.ws.rs.core.Response;
+import com.google.inject.Inject;
+
+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.AuthorizationErrorResponse;
+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.Nonce;
+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 {
+    public final Boolean force;
+    private final ClientID clientId;
+    private final Secret clientSecret;
+    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) {
+        force = config.getBoolean(Keys.OPENID_FORCE);
+        clientId = new ClientID(config.getString(Keys.OPENID_CLIENTID));
+        clientSecret = new Secret(config.getString(Keys.OPENID_CLIENTSECRET));
+
+        this.loginService = loginService;
+
+        try {
+            callbackUrl = new URI(config.getString(Keys.WEB_URL, "") + "/api/session/openid/callback");
+            authUrl = new URI(config.getString(Keys.OPENID_AUTHURL, ""));
+            tokenUrl = new URI(config.getString(Keys.OPENID_TOKENURL, ""));
+            userInfoUrl = new URI(config.getString(Keys.OPENID_USERINFOURL, ""));
+            baseUrl = new URI(config.getString(Keys.WEB_URL, ""));
+        } catch (URISyntaxException e) {
+        }
+
+        adminGroup = config.getString(Keys.OPENID_ADMINGROUP);
+    }
+
+    public URI createAuthUri() {
+        AuthenticationRequest request = new AuthenticationRequest.Builder(
+                new ResponseType("code"),
+                new Scope("openid", "profile", "email", "groups"),
+                clientId,
+                callbackUrl)
+                .endpointURI(authUrl)
+                .state(new State())
+                .nonce(new Nonce())
+                .build();
+
+        return request.toURI();
+    }
+
+    private OIDCTokenResponse getToken(AuthorizationCode code) {
+        // Credentials to authenticate us to the token endpoint
+        ClientAuthentication clientAuth = new ClientSecretBasic(clientId, clientSecret);
+        AuthorizationGrant codeGrant = new AuthorizationCodeGrant(code, callbackUrl);
+
+        TokenRequest request = new TokenRequest(tokenUrl, clientAuth, codeGrant);
+        TokenResponse tokenResponse;
+
+        try {
+            HTTPResponse tokenReq = request.toHTTPRequest().send();
+            tokenResponse = OIDCTokenResponseParser.parse(tokenReq);
+            if (!tokenResponse.indicatesSuccess()) {
+                return null;
+            }
+
+            return (OIDCTokenResponse) tokenResponse.toSuccessResponse();
+        } catch (IOException e) {
+            return null;
+        } catch (ParseException e) {
+            return null;
+        }
+    }
+
+    private UserInfo getUserInfo(BearerAccessToken token) throws IOException, ParseException {
+        UserInfoResponse userInfoResponse;
+
+        HTTPResponse httpResponse = new UserInfoRequest(userInfoUrl, token)
+                .toHTTPRequest()
+                .send();
+
+        userInfoResponse = UserInfoResponse.parse(httpResponse);
+
+        if (!userInfoResponse.indicatesSuccess()) {
+            // User info request failed - usually from expiring
+            return null;
+        }
+
+        return userInfoResponse.toSuccessResponse().getUserInfo();
+    }
+
+    public Response handleCallback(URI requestUri, HttpServletRequest request) throws StorageException, ParseException, IOException, WebApplicationException {
+        AuthorizationResponse response = AuthorizationResponse.parse(requestUri);
+
+        if (!response.indicatesSuccess()) {
+            AuthorizationErrorResponse error = response.toErrorResponse();
+            throw new WebApplicationException(Response.status(403).entity(error.getErrorObject().getDescription()).build());
+        }
+
+        AuthorizationCode authCode = response.toSuccessResponse().getAuthorizationCode();
+
+        if (authCode == null) {
+            return Response.status(403).entity( "Invalid OpenID Connect callback.").build();
+        }
+
+        OIDCTokenResponse tokens = getToken(authCode);
+
+        if (tokens == null) {
+            return Response.status(403).entity("Unable to authenticate with the OpenID Connect provider. Please try again.").build();
+        }
+
+        BearerAccessToken bearerToken = tokens.getOIDCTokens().getBearerAccessToken();
+
+        UserInfo userInfo = getUserInfo(bearerToken);
+
+        if (userInfo == null) {
+            return Response.status(500).entity("Failed to access OpenID Connect user info endpoint. Please contact your administrator.").build();
+        }
+
+        User user = loginService.login(userInfo.getEmailAddress(), userInfo.getName(), userInfo.getStringListClaim("groups").contains(adminGroup));
+
+        request.getSession().setAttribute(SessionResource.USER_ID_KEY, user.getId());
+        LogAction.login(user.getId(), ServletHelper.retrieveRemoteAddress(request));
+        return Response.seeOther(
+                baseUrl).build();
+    }
+}