implement 'sesame' auth

view-webapp/pom.xml

@@ -92,6 +92,7 @@
                         <pairgoth.logger.format>${pairgoth.logger.format}</pairgoth.logger.format>
                         <pairgoth.logger.level.org.jeudego.pairgoth.web.ApiServlet.api>debug</pairgoth.logger.level.org.jeudego.pairgoth.web.ApiServlet.api>
                         <pairgoth.auth>${pairgoth.auth}</pairgoth.auth>
+                        <pairgoth.auth.sesame>${pairgoth.auth.sesame}</pairgoth.auth.sesame>
                         <org.slf4j.simpleLogger.defaultLogLevel>debug</org.slf4j.simpleLogger.defaultLogLevel>
                     </systemProperties>
                     <webApp>

view-webapp/src/main/kotlin/org/jeudego/pairgoth/web/AuthFilter.kt

@@ -29,22 +29,31 @@ class AuthFilter: Filter {
         val session: HttpSession? = request.getSession(false)
         val auth = WebappManager.getProperty("auth") ?: throw Error("authentication not configured")
 
-        if (auth == "none" || whitelist.contains(uri) || uri.contains(Regex("\\.(?!html)")) || session?.getAttribute("logged") != null) {
+        if (auth == "none" || whitelisted(uri) || session?.getAttribute("logged") != null) {
             chain.doFilter(req, resp)
         } else {
             // TODO - configure if unauth requests are redirected and/or forwarded
             // TODO - protection against brute force attacks
-            if (uri == "/index") {
+            if (uri.endsWith("/index")) {
                 request.getRequestDispatcher("/index-ffg").forward(req, resp)
             } else {
                 response.sendRedirect("/login")
             }
         }
     }
+
     companion object {
         private val whitelist = setOf(
             "/index-ffg",
-            "/login"
+            "/login",
+            "/api/login"
         )
+
+        fun whitelisted(uri: String): Boolean {
+            if (uri.contains(Regex("\\.(?!html)"))) return true
+            val nolangUri = uri.replace(Regex("^/../"), "/")
+            return whitelist.contains(nolangUri)
+        }
+
     }
 }

view-webapp/src/main/kotlin/org/jeudego/pairgoth/web/LoginServlet.kt

@@ -0,0 +1,41 @@
+package org.jeudego.pairgoth.web
+
+import com.republicate.kson.Json
+import org.slf4j.LoggerFactory
+import javax.servlet.http.HttpServlet
+import javax.servlet.http.HttpServletRequest
+import javax.servlet.http.HttpServletResponse
+
+class LoginServlet: HttpServlet() {
+
+    override fun doPost(req: HttpServletRequest, resp: HttpServletResponse) {
+        try {
+            val contentType = req.contentType
+            val sep = contentType.indexOf(';')
+            val mimeType = if (sep == -1) contentType else contentType.substring(0, sep).trim { it <= ' ' }
+            if (!isJson(mimeType)) throw Error("expecting json")
+            val payload = Json.Companion.parse(req.reader.readText())?.asObject() ?: throw Error("null json")
+            val user = when (WebappManager.getProperty("auth")) {
+                "sesame" -> checkSesame(payload)
+                else -> null
+            } ?: throw Error("authentication failed")
+            req.session.setAttribute("logged", user)
+            val ret = Json.Object("status" to "ok")
+            resp.contentType = "application/json"
+            resp.writer.println(ret.toString())
+        } catch (t: Throwable) {
+            logger.error("exception while logging in", t)
+            resp.sendError(HttpServletResponse.SC_BAD_REQUEST)
+        }
+    }
+
+    fun checkSesame(payload: Json.Object): Boolean? {
+        val expected = WebappManager.getProperty("auth.sesame") ?: throw Error("sesame wrongly configured")
+        return if (payload.getString("sesame")?.equals(expected) == true) true else null
+    }
+
+    companion object {
+        fun isJson(mimeType: String) = "text/json" == mimeType || "application/json" == mimeType || mimeType.endsWith("+json")
+        val logger = LoggerFactory.getLogger("login")
+    }
+}

view-webapp/src/main/webapp/WEB-INF/web.xml

@@ -88,6 +88,12 @@
     <load-on-startup>1</load-on-startup>
     <async-supported>true</async-supported>
   </servlet>
+  <servlet>
+    <servlet-name>login</servlet-name>
+    <servlet-class>org.jeudego.pairgoth.web.LoginServlet</servlet-class>
+    <load-on-startup>1</load-on-startup>
+    <async-supported>true</async-supported>
+  </servlet>
 
   <!-- servlet mappings -->
   <servlet-mapping>
@@ -110,6 +116,10 @@
     <servlet-name>import</servlet-name>
     <url-pattern>/api/import/*</url-pattern>
   </servlet-mapping>
+  <servlet-mapping>
+    <servlet-name>login</servlet-name>
+    <url-pattern>/api/login</url-pattern>
+  </servlet-mapping>
 
   <!-- context params -->
   <context-param>

view-webapp/src/main/webapp/js/main.js

@@ -219,7 +219,7 @@ onLoad(() => {
         break;
       }
       case 'ArrowDown': {
-        if (searchResultShown()) {
+        if (typeof(searchResultShown) === 'function' && searchResultShown()) {
           let lines = $('.result-line');
           if (typeof (searchHighlight) === 'undefined') searchHighlight = 0;
           else ++searchHighlight;
@@ -230,7 +230,7 @@ onLoad(() => {
         break;
       }
       case 'ArrowUp': {
-        if (searchResultShown()) {
+        if (typeof(searchResultShown) === 'function' && searchResultShown()) {
           let lines = $('.result-line');
           if (typeof (searchHighlight) === 'undefined') searchHighlight = 0;
           else --searchHighlight;
@@ -241,11 +241,13 @@ onLoad(() => {
         break;
       }
       case 'Enter': {
+        if (typeof(searchResultShown) === 'function') {
           if (searchResultShown()) {
             fillPlayer(searchResult[searchHighlight]);
           } else {
             $('#register')[0].click();
           }
+        }
         break;
       }
     }

view-webapp/src/main/webapp/login.html

@@ -1,8 +1,8 @@
 <div id="login" class="section">
-  <form id="login-form" class="ui form">
+  <form id="login-form" class="ui form" autocomplete="off">
     <div class="field">
       <label>Enter the magic word</label>
-      <input type="text" name="sesame"/>
+      <input type="text" name="sesame" autocomplete="false"/>
       <button type="submit" class="ui green floating button">Log in</button>
     </div>
   </form>
@@ -10,9 +10,9 @@
 <script type="text/javascript">
   onLoad(()=>{
     $('#login-form').on('submit', e => {
-      api.postJson('login', { sesame: $('input[name="sesame"]').val() })
+      api.postJson('login', { sesame: $('input[name="sesame"]')[0].value })
         .then(resp => {
-          if (resp !== 'error') {
+          if (resp !== 'error' && resp.status === 'ok') {
             document.location.href = '/index'
           }
         });