From 82253119fc12055f303bd7f7c986fc2f40554b7b Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Wed, 2 Aug 2023 19:08:39 +0200
Subject: [PATCH] Added Ed25519 DKIM support

---
 app/src/main/java/eu/faircode/email/MessageHelper.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/eu/faircode/email/MessageHelper.java b/app/src/main/java/eu/faircode/email/MessageHelper.java
index 6586784dfd..962c3813f5 100644
--- a/app/src/main/java/eu/faircode/email/MessageHelper.java
+++ b/app/src/main/java/eu/faircode/email/MessageHelper.java
@@ -2304,8 +2304,10 @@ public class MessageHelper {
         } else if ("rsa-sha256".equals(a)) {
             halgo = "SHA-256";
             salgo = "SHA256withRSA";
+        } else if ("ed25519-sha256".equals(a)) {
+            halgo = "SHA-256";
+            salgo = "Ed25519";
         } else {
-            // TODO: Ed25519
             Log.i("DKIM a=" + a);
             return null;
         }
@@ -2448,7 +2450,7 @@ public class MessageHelper {
             Log.i("DKIM pubkey=" + p);
 
             X509EncodedKeySpec pubKeySpec = new X509EncodedKeySpec(Base64.decode(p, Base64.DEFAULT));
-            KeyFactory keyFactory = KeyFactory.getInstance("RSA");
+            KeyFactory keyFactory = KeyFactory.getInstance("Ed25519".equals(salgo) ? "Ed25519" : "RSA");
             PublicKey pubKey = keyFactory.generatePublic(pubKeySpec);
             Signature sig = Signature.getInstance(salgo); // a=