* Router: Add a keyring for decrypting leases

* Routerconsole: Add configkeyring.jsp

apps/routerconsole/java/src/net/i2p/router/web/ConfigKeyringHelper.java

@@ -0,0 +1,36 @@
+package net.i2p.router.web;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+
+import net.i2p.router.RouterContext;
+
+public class ConfigKeyringHelper {
+    private RouterContext _context;
+    /**
+     * Configure this bean to query a particular router context
+     *
+     * @param contextId begging few characters of the routerHash, or null to pick
+     *                  the first one we come across.
+     */
+    public void setContextId(String contextId) {
+        try {
+            _context = ContextHelper.getContext(contextId);
+        } catch (Throwable t) {
+            t.printStackTrace();
+        }
+    }
+
+    public ConfigKeyringHelper() {}
+    
+    public String getSummary() {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream(4*1024);
+        try {
+            _context.keyRing().renderStatusHTML(new OutputStreamWriter(baos));
+        } catch (IOException ioe) {
+            ioe.printStackTrace();
+        }
+        return new String(baos.toByteArray());
+    }
+}