working on oidc auth

pom.xml

@@ -7,6 +7,18 @@
     <groupId>org.example</groupId>
     <artifactId>Widerhall</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>16</source>
+                    <target>16</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
 
     <properties>
         <maven.compiler.source>17</maven.compiler.source>
@@ -14,6 +26,25 @@
     </properties>
 
     <dependencies>
+
+        <dependency>
+            <groupId>org.eclipse.jetty</groupId>
+            <artifactId>jetty-server</artifactId>
+            <version>10.0.9</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.eclipse.jetty</groupId>
+            <artifactId>jetty-servlet</artifactId>
+            <version>10.0.9</version>
+        </dependency>
+
+        <dependency>
+            <groupId>de.srsoftware</groupId>
+            <artifactId>tools</artifactId>
+            <version>1.1.18</version>
+        </dependency>
+
         <dependency>
             <groupId>com.sun.mail</groupId>
             <artifactId>javax.mail</artifactId>

src/main/java/de/srsoftware/widerhall/Application.java

@@ -1,5 +1,15 @@
 package de.srsoftware.widerhall;
 
+import de.srsoftware.widerhall.mail.Forwarder;
+import de.srsoftware.widerhall.mail.ImapClient;
+import de.srsoftware.widerhall.mail.MessageHandler;
+import de.srsoftware.widerhall.web.Index;
+import de.srsoftware.widerhall.web.Login;
+import de.srsoftware.widerhall.web.Rest;
+import org.eclipse.jetty.server.Connector;
+import org.eclipse.jetty.server.Server;
+import org.eclipse.jetty.server.ServerConnector;
+import org.eclipse.jetty.servlet.ServletContextHandler;
 import org.json.simple.JSONObject;
 import org.json.simple.parser.JSONParser;
 import org.json.simple.parser.ParseException;
@@ -7,17 +17,35 @@ import org.json.simple.parser.ParseException;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Map;
+import static de.srsoftware.widerhall.Constants.*;
 
 public class Application {
 
-    public static void main(String[] args) throws IOException, ParseException {
-        var parser = new JSONParser();
-        var config = Files.readString(new File("/tmp/config.json").toPath());
-        JSONObject json = (JSONObject) parser.parse(config);
+    public static void main(String[] args) throws Exception {
+        var config = Configuration.setFile(new File("/tmp/config.json"));
+        //startMailSystem(json);
+        startWebserver(config);
+    }
 
+    private static void startWebserver(Configuration config) throws Exception {
+        var server = new Server();
+        var connector = new ServerConnector(server);
+        connector.setPort(config.serverPort());
+        server.setConnectors(new Connector[]{connector});
+        ServletContextHandler context = new ServletContextHandler(server, "/");
+        context.addServlet(Rest.class,"/api");
+        context.addServlet(Login.class,"/login");
+        context.addServlet(Index.class,"/");
+
+        server.start();
+    }
+
+    private static void startMailSystem(JSONObject json) {
         MessageHandler forward = new Forwarder(json);
-       new ImapClient(json)
-               .addListener(forward)
-               .start();
+        new ImapClient(json)
+                .addListener(forward)
+                .start();
     }
 }

src/main/java/de/srsoftware/widerhall/Configuration.java

@@ -0,0 +1,81 @@
+package de.srsoftware.widerhall;
+
+import org.json.simple.JSONObject;
+import org.json.simple.parser.JSONParser;
+import org.json.simple.parser.ParseException;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.nio.file.Files;
+import static de.srsoftware.widerhall.Constants.*;
+public class Configuration {
+    private static Configuration singleton = null;
+    private JSONObject data;
+    private final File file;
+
+    public Configuration(File configFile) throws IOException, ParseException {
+        this.file = configFile;
+        if (!configFile.exists()){
+            setDefaults();
+            save();
+        }
+        var content = Files.readString(configFile.toPath());
+        data = (JSONObject) new JSONParser().parse(content);
+    }
+
+    public static Configuration setFile(File file) throws IOException, ParseException {
+        singleton = new Configuration(file);
+        return singleton;
+    }
+
+    public static Configuration instance() {
+        return singleton;
+    }
+
+    private void setDefaults() throws MalformedURLException {
+        if (data == null) data = new JSONObject();
+        serverPort();
+        tokenUrl();
+        loginUrl();
+        baseUrl();
+        clientId();
+        clientSecret();
+    }
+
+    private void save() throws IOException {
+        Files.writeString(file.toPath(),data.toJSONString());
+    }
+
+    public int serverPort() {
+        if (!data.containsKey(PORT)) data.put(PORT,80L);
+        var o = data.get(PORT);
+        return (int) (long) o;
+    }
+
+    public URL tokenUrl() throws MalformedURLException {
+        if (!data.containsKey(TOKEN_URL)) data.put(TOKEN_URL,"http://localhost:"+serverPort()+"/oauth/token");
+        return new URL((String) data.get(TOKEN_URL));
+    }
+
+    public String loginUrl() {
+        if (!data.containsKey(LOGIN_URL)) data.put(LOGIN_URL,"http://localhost:"+serverPort()+"/oauth/login");
+        return (String) data.get(LOGIN_URL);
+    }
+
+    public String baseUrl() {
+        if (!data.containsKey(BASE_URL)) data.put(BASE_URL,"http://localhost");
+        return (String) data.get(BASE_URL);
+    }
+
+    public String clientId() {
+        if (!data.containsKey(Constants.CLIENT_ID)) data.put(CLIENT_ID,"widerhall");
+        return (String) data.get(CLIENT_ID);
+    }
+
+    public Object clientSecret() {
+        if (!data.containsKey(Constants.CLIENT_SECRET)) data.put(CLIENT_SECRET,"changeme");
+        return (String) data.get(CLIENT_SECRET);
+    }
+}

src/main/java/de/srsoftware/widerhall/Constants.java

@@ -7,4 +7,10 @@ public class Constants {
     public static final String USER = "user";
     public static final String PASSWORD = "password";
     public static final String INBOX = "inbox";
+    public static final Object PORT = "port";
+    public static final String TOKEN_URL = "token_url";
+    public static final String LOGIN_URL = "login_url";
+    public static final String BASE_URL = "base_url";
+    public static final String CLIENT_ID = "client_id";
+    public static final String CLIENT_SECRET = "client_secret";
 }

src/main/java/de/srsoftware/widerhall/mail/Forwarder.java

@@ -1,4 +1,4 @@
-package de.srsoftware.widerhall;
+package de.srsoftware.widerhall.mail;
 
 import org.json.simple.JSONObject;
 import org.slf4j.Logger;

src/main/java/de/srsoftware/widerhall/mail/ImapClient.java

@@ -1,8 +1,7 @@
-package de.srsoftware.widerhall;
+package de.srsoftware.widerhall.mail;
 
-import com.sun.mail.iap.ProtocolException;
 import com.sun.mail.imap.IMAPFolder;
-import com.sun.mail.imap.protocol.IMAPProtocol;
+import de.srsoftware.widerhall.Constants;
 import org.json.simple.JSONObject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -106,7 +105,7 @@ public class ImapClient {
             }
         }
     }
-    ImapClient(JSONObject config){
+    public ImapClient(JSONObject config){
         this.config = config;
     }
 

src/main/java/de/srsoftware/widerhall/mail/MessageHandler.java

@@ -1,4 +1,4 @@
-package de.srsoftware.widerhall;
+package de.srsoftware.widerhall.mail;
 
 import javax.mail.Message;
 import javax.mail.MessagingException;

src/main/java/de/srsoftware/widerhall/mail/SmtpClient.java

@@ -1,18 +1,13 @@
-package de.srsoftware.widerhall;
+package de.srsoftware.widerhall.mail;
 
 import org.json.simple.JSONObject;
-import org.json.simple.parser.JSONParser;
-import org.json.simple.parser.ParseException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import javax.mail.*;
 import javax.mail.internet.InternetAddress;
 import javax.mail.internet.MimeMessage;
-import java.io.File;
-import java.io.IOException;
 import java.io.UnsupportedEncodingException;
-import java.nio.file.Files;
 import java.util.Date;
 import java.util.Map;
 import java.util.Properties;

src/main/java/de/srsoftware/widerhall/web/Index.java

@@ -0,0 +1,43 @@
+package de.srsoftware.widerhall.web;
+
+import de.srsoftware.tools.Tag;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+public class Index extends HttpServlet {
+
+    private static final Logger LOG = LoggerFactory.getLogger(Index.class);
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        resp.setContentType("text/html");
+        resp.setStatus(HttpServletResponse.SC_OK);
+        String auth = req.getHeader("Authorization");
+        if (auth == null) {
+            resp.sendRedirect("login");
+            return;
+        }
+        LOG.debug("Authorization: {}",auth);
+
+        resp.getWriter().println(page(auth));
+
+    }
+
+    private Tag head() {
+        return new Tag("meta")
+                .attr("charset","utf-8")
+                .addTo(new Tag("head"));
+
+    }
+
+    private Tag page(String auth) {
+        var body = new Tag("body").content(auth);
+        return body.addTo(head().addTo(new Tag("html")));
+    }
+}

src/main/java/de/srsoftware/widerhall/web/Login.java

@@ -0,0 +1,127 @@
+package de.srsoftware.widerhall.web;
+
+import de.srsoftware.widerhall.Configuration;
+import de.srsoftware.widerhall.web.tags.Page;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.net.ssl.HttpsURLConnection;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.BufferedReader;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+public class Login extends HttpServlet {
+
+    private static final Logger LOG = LoggerFactory.getLogger(Login.class);
+    private final Configuration config;
+
+    public Login(){
+        this.config = Configuration.instance();
+        LOG.debug("Creating new instance of Login.class");
+    }
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        var error = req.getParameter("error");
+        if (error != null){
+            var description = req.getParameter("error_description");
+            sendError(resp,error+": "+description);
+            return;
+        }
+        LOG.debug("params: {}",req.getParameterMap());
+        var code = req.getParameter("code");
+        if (code != null){
+            getTokenFor(code,resp);
+            resp.getWriter().println(new Page("rceived code: "+code));
+            return;
+        }
+        resp.sendRedirect(loginUrl());
+    }
+
+    private static String urlEncode(Map<String, Object> data) {
+        String params = data.entrySet()
+                .stream()
+                .map(entry -> encode(entry.getKey()) + "=" + encode(entry.getValue()))
+                .collect(Collectors.joining("&"));
+        return params;
+    }
+
+    private static String encode(Object value) {
+        return URLEncoder.encode(value.toString(),StandardCharsets.UTF_8);
+    }
+
+    private void getTokenFor(String code, HttpServletResponse resp) throws IOException {
+        var url = config.tokenUrl();
+        LOG.debug("Sending 'POST' request to URL '{}'",url);
+        HttpsURLConnection httpClient = (HttpsURLConnection) url.openConnection();
+
+        //add reuqest header
+        httpClient.setRequestMethod("POST");
+        httpClient.setRequestProperty( "Content-Type", "application/x-www-form-urlencoded");
+        httpClient.setRequestProperty( "Accept", "*/*" );
+        //httpClient.setRequestProperty("User-Agent", "Mozilla/5.0");
+        //httpClient.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
+
+        String urlParameters = urlEncode(Map.of(
+                "code",code,
+                "client_id",config.clientId(),
+                "client_secret",config.clientSecret(),
+                "grant_type","authorization_code"));
+
+        LOG.debug("Posting parameters '{}'",urlParameters);
+
+        // Send post request
+        httpClient.setDoOutput(true);
+        httpClient.setDoInput(true);
+        try (DataOutputStream wr = new DataOutputStream(httpClient.getOutputStream())) {
+            wr.writeBytes(urlParameters);
+            wr.flush();
+        }
+
+        int responseCode = httpClient.getResponseCode();
+        LOG.debug("Response Code: {}",responseCode);
+
+        try (BufferedReader in = new BufferedReader(new InputStreamReader(httpClient.getInputStream()))) {
+
+            String line;
+            StringBuilder response = new StringBuilder();
+
+            while ((line = in.readLine()) != null) {
+                response.append(line);
+            }
+
+            //print result
+            //System.out.println(response.toString());
+            resp.getWriter().println(response);
+
+        }
+    }
+
+    private void sendError(HttpServletResponse resp, String error) throws IOException {
+        LOG.debug("error: {}",error);
+        resp.sendError(HttpServletResponse.SC_BAD_REQUEST,error);
+    }
+
+    private String loginUrl() {
+        return config.loginUrl()+"?"+urlEncode(Map.of(
+                "response_type","code",
+                "client_id",config.clientId(),
+                "state",123456,
+                "redirect_uri",redirectUri(),
+                "scope","openid"
+        ));
+    }
+
+    private String redirectUri() {
+        int port = config.serverPort();
+        return config.baseUrl()+(port == 80 ? "" : ":"+port)+"/login";
+    }
+}

src/main/java/de/srsoftware/widerhall/web/Rest.java

@@ -0,0 +1,21 @@
+package de.srsoftware.widerhall.web;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+public class Rest extends HttpServlet {
+
+    private static final Logger LOG = LoggerFactory.getLogger(Rest.class);
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        String method = req.getMethod();
+        LOG.debug("GET {}"+method);
+
+    }
+}

src/main/java/de/srsoftware/widerhall/web/tags/Header.java

@@ -0,0 +1,10 @@
+package de.srsoftware.widerhall.web.tags;
+
+import de.srsoftware.tools.Tag;
+
+public class Header extends Tag {
+    public Header() {
+        super("head");
+        new Tag("meta").attr("charset","utf-8").addTo(this);
+    }
+}

src/main/java/de/srsoftware/widerhall/web/tags/Page.java

@@ -0,0 +1,11 @@
+package de.srsoftware.widerhall.web.tags;
+
+import de.srsoftware.tools.Tag;
+
+public class Page extends Tag {
+    public Page(String content) {
+        super("html");
+        new Header().addTo(this);
+        new Tag("body").content(content).addTo(this);
+    }
+}