Autocrypt: refactoring

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -6650,24 +6650,20 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                         byte[] keydata = null;
 
                         // https://autocrypt.org/level1.html#the-autocrypt-header
-                        String[] param = message.autocrypt.split(";");
-                        for (int i = 0; i < param.length; i++) {
-                            int e = param[i].indexOf("=");
-                            if (e > 0) {
-                                String key = param[i].substring(0, e).trim().toLowerCase(Locale.ROOT);
-                                String value = param[i].substring(e + 1);
-                                Log.i("Autocrypt " + key + "=" + value);
-                                switch (key) {
-                                    case "addr":
-                                        addr = value;
-                                        break;
-                                    case "prefer-encrypt":
-                                        mutual = value.trim().toLowerCase(Locale.ROOT).equals("mutual");
-                                        break;
-                                    case "keydata":
-                                        keydata = Base64.decode(value, Base64.DEFAULT);
-                                        break;
-                                }
+                        Map<String, String> kv = MessageHelper.getKeyValues(message.autocrypt);
+                        for (String key : kv.keySet()) {
+                            String value = kv.get(key).toLowerCase(Locale.ROOT);
+                            Log.i("Autocrypt " + key + "=" + value);
+                            switch (key) {
+                                case "addr":
+                                    addr = value;
+                                    break;
+                                case "prefer-encrypt":
+                                    mutual = value.trim().toLowerCase(Locale.ROOT).equals("mutual");
+                                    break;
+                                case "keydata":
+                                    keydata = Base64.decode(value, Base64.DEFAULT);
+                                    break;
                             }
                         }