From 081a024deb29369904fdaea3fbf000fa71e5f59f Mon Sep 17 00:00:00 2001
From: zzz <zzz@i2pmail.org>
Date: Mon, 29 Jan 2024 08:46:54 -0500
Subject: [PATCH] Util: Add .alt to selfsigned cert alt names

---
 core/java/src/net/i2p/crypto/SelfSignedGenerator.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/java/src/net/i2p/crypto/SelfSignedGenerator.java b/core/java/src/net/i2p/crypto/SelfSignedGenerator.java
index 773b7a7b8..bac548f18 100644
--- a/core/java/src/net/i2p/crypto/SelfSignedGenerator.java
+++ b/core/java/src/net/i2p/crypto/SelfSignedGenerator.java
@@ -676,6 +676,9 @@ public final class SelfSignedGenerator {
             altNames.add("localhost");
             altNames.add("127.0.0.1");
             altNames.add("::1");
+            // RFC 9476
+            if (cname.endsWith(".i2p"))
+                altNames.add(cname + ".alt");
         }
         for (String n : altNames) {
             int len;