* Console: Add /proof page which can copied to prove you run a router

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

@@ -0,0 +1,37 @@
+package net.i2p.router.web;
+
+import java.util.Date;
+
+import net.i2p.data.DataHelper;
+import net.i2p.data.RouterAddress;
+import net.i2p.data.RouterInfo;
+import net.i2p.data.Signature;
+
+/**
+ *  Sign a statement about this router.
+ *  @since 0.9.8
+ */
+public class ProofHelper extends HelperBase {
+    
+    public String getProof() {
+        StringBuilder buf = new StringBuilder(512);
+        RouterInfo us = _context.router().getRouterInfo();
+        buf.append("Hash: ").append(us.getIdentity().calculateHash().toBase64()).append('\n');
+        //buf.append("Ident: ").append(us.getIdentity().toBase64()).append('\n');
+        for (RouterAddress addr : us.getAddresses()) {
+            buf.append(addr.getTransportStyle()).append(": ").append(addr.getHost()).append('\n');
+        }
+        buf.append("Caps: ").append(us.getCapabilities()).append('\n');
+        buf.append("Date: ").append(new Date()); // no trailing newline
+        String msg = buf.toString();
+        byte[] data = DataHelper.getUTF8(msg);
+        Signature sig = _context.dsa().sign(data, _context.keyManager().getSigningPrivateKey());
+        buf.setLength(0);
+        buf.append("--- BEGIN I2P SIGNED MESSAGE ---\n");
+        buf.append(msg);
+        buf.append("\n--- END I2P SIGNED MESSAGE ---\n");
+        buf.append(sig.toBase64());
+        buf.append("\n--- END I2P SIGNATURE ---");
+        return buf.toString();
+    }
+}