Directory id for root is derived from key material.

Author: ylangisc

cryptomator/src/main/java/ch/cyberduck/core/cryptomator/UVFVault.java

@@ -20,7 +20,7 @@
 import ch.cyberduck.core.PathAttributes;
 import ch.cyberduck.core.Session;
 import ch.cyberduck.core.SimplePathPredicate;
-import ch.cyberduck.core.cryptomator.impl.CryptoDirectoryV7Provider;
+import ch.cyberduck.core.cryptomator.impl.CryptoDirectoryUVFProvider;
 import ch.cyberduck.core.cryptomator.impl.CryptoFilenameV7Provider;
 import ch.cyberduck.core.cryptomator.random.FastSecureRandomProvider;
 import ch.cyberduck.core.exception.BackgroundException;
@@ -84,7 +84,7 @@ public UVFVault load(final Session<?> session, final PasswordCallback prompt) th
         this.cryptor = provider.provide(masterKey, FastSecureRandomProvider.get().provide());
         this.fileNameCryptor = new CryptorCache(cryptor.fileNameCryptor(masterKey.firstRevision())); // TODO revision eventually depends on location - safe?
         this.filenameProvider = new CryptoFilenameV7Provider(Integer.MAX_VALUE); // TODO there is no shortening in UVF defined yet
-        this.directoryProvider = new CryptoDirectoryV7Provider(vault, filenameProvider, fileNameCryptor);
+        this.directoryProvider = new CryptoDirectoryUVFProvider(vault, filenameProvider, fileNameCryptor);
         this.nonceSize = 12;
         return this;
     }

cryptomator/src/main/java/ch/cyberduck/core/cryptomator/impl/CryptoDirectoryUVFProvider.java

@@ -0,0 +1,41 @@
+package ch.cyberduck.core.cryptomator.impl;
+
+/*
+ * Copyright (c) 2002-2025 iterate GmbH. All rights reserved.
+ * https://cyberduck.io/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+import ch.cyberduck.core.Path;
+import ch.cyberduck.core.Session;
+import ch.cyberduck.core.SimplePathPredicate;
+import ch.cyberduck.core.cryptomator.CryptoFilename;
+import ch.cyberduck.core.cryptomator.CryptorCache;
+import ch.cyberduck.core.exception.BackgroundException;
+
+public class CryptoDirectoryUVFProvider extends CryptoDirectoryV7Provider {
+
+    private final Path home;
+
+    public CryptoDirectoryUVFProvider(final Path vault, final CryptoFilename filenameProvider, final CryptorCache filenameCryptor) {
+        super(vault, filenameProvider, filenameCryptor);
+        this.home = vault;
+    }
+
+    @Override
+    protected byte[] toDirectoryId(final Session<?> session, final Path directory, final byte[] directoryId) throws BackgroundException {
+        if(new SimplePathPredicate(home).test(directory)) {
+            return directoryId;
+        }
+        return super.toDirectoryId(session, directory, directoryId);
+    }
+}

cryptomator/src/main/java/ch/cyberduck/core/cryptomator/impl/CryptoDirectoryV6Provider.java

@@ -103,7 +103,7 @@ public Path toEncrypted(final Session<?> session, final byte[] directoryId, fina
         throw new NotfoundException(directory.getAbsolute());
     }
 
-    private byte[] toDirectoryId(final Session<?> session, final Path directory, final byte[] directoryId) throws BackgroundException {
+    protected byte[] toDirectoryId(final Session<?> session, final Path directory, final byte[] directoryId) throws BackgroundException {
         if(new SimplePathPredicate(home).test(directory)) {
             return ROOT_DIR_ID;
         }