diff --git a/webui/src/main/java/com/muwire/webui/SignServlet.java b/webui/src/main/java/com/muwire/webui/SignServlet.java
new file mode 100644
index 00000000..dc95e8eb
--- /dev/null
+++ b/webui/src/main/java/com/muwire/webui/SignServlet.java
@@ -0,0 +1,53 @@
+package com.muwire.webui;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import com.muwire.core.Core;
+
+import net.i2p.crypto.DSAEngine;
+import net.i2p.data.Base64;
+import net.i2p.data.Signature;
+
+public class SignServlet extends HttpServlet {
+
+ private Core core;
+
+ @Override
+ public void init(ServletConfig config) throws ServletException {
+ core = (Core) config.getServletContext().getAttribute("core");
+ }
+
+ @Override
+ protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+ String text = req.getParameter("text");
+ if (text == null) {
+ resp.sendError(503, "Nothing to sign?");
+ return;
+ }
+
+ byte [] payload = text.getBytes(StandardCharsets.UTF_8);
+ Signature sig = DSAEngine.getInstance().sign(payload, core.getSpk());
+
+ String response = Base64.encode(sig.getData());
+
+ StringBuilder sb = new StringBuilder();
+ sb.append("");
+ sb.append("").append(response).append("");
+
+ resp.setContentType("text/xml");
+ resp.setCharacterEncoding("UTF-8");
+ resp.setDateHeader("Expires", 0);
+ resp.setHeader("Pragma", "no-cache");
+ resp.setHeader("Cache-Control", "no-store, max-age=0, no-cache, must-revalidate");
+ byte[] out = sb.toString().getBytes("UTF-8");
+ resp.setContentLength(out.length);
+ resp.getOutputStream().write(out);
+ }
+}
diff --git a/webui/src/main/js/sign.js b/webui/src/main/js/sign.js
new file mode 100644
index 00000000..23592edf
--- /dev/null
+++ b/webui/src/main/js/sign.js
@@ -0,0 +1,15 @@
+function sign() {
+ var signText = document.getElementById("sign").value
+
+ var xmlhttp = new XMLHttpRequest()
+ xmlhttp.onreadystatechange = function() {
+ if (this.readyState == 4 && this.status == 200) {
+ var signed = this.responseXML.getElementsByTagName("Signed")[0].childNodes[0].nodeValue
+ var signedDiv = document.getElementById("signed")
+ signedDiv.innerHTML = "" + signed + "
"
+ }
+ }
+ xmlhttp.open("POST", "/MuWire/Sign", true)
+ xmlhttp.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
+ xmlhttp.send(encodeURI("text=" + signText))
+}
diff --git a/webui/src/main/webapp/AboutMe.jsp b/webui/src/main/webapp/AboutMe.jsp
index 05ca172b..b2292473 100644
--- a/webui/src/main/webapp/AboutMe.jsp
+++ b/webui/src/main/webapp/AboutMe.jsp
@@ -20,6 +20,7 @@ Core core = (Core) application.getAttribute("core");
<%@include file="css.jsi"%>
+