removed logging, fixed null passwords.

lib/src/kdbx_format.dart

@@ -535,9 +535,7 @@ class KdbxFormat {
     }
 
     final credentialHash = credentials.getHash();
-    _logger.finest('credentialHash: ${ByteUtils.toHexList(credentialHash)}');
     final key = KeyEncrypterKdf(argon2).encrypt(credentialHash, kdfParameters);
-    _logger.finest('key: ${ByteUtils.toHexList(key)}');
 
 //    final keyWithSeed = Uint8List(65);
 //    keyWithSeed.replaceRange(0, masterSeed.length, masterSeed);
@@ -574,6 +572,9 @@ class KdbxFormat {
         .findAllElements('Value')
         .where((el) => el.getAttribute('Protected')?.toLowerCase() == 'true')) {
       final pw = gen.decryptBase64(el.text.trim());
+      if (pw == null) {
+        continue;
+      }
       KdbxFile.protectedValues[el] = ProtectedValue.fromString(pw);
     }
 

lib/src/kdbx_header.dart

@@ -353,10 +353,10 @@ class KdbxHeader {
       final headerId = reader.readUint8();
       final int bodySize =
           versionMajor >= 4 ? reader.readUint32() : reader.readUint16();
-      _logger.fine('Reading header with id $headerId (size: $bodySize)}');
+//      _logger.fine('Reading header with id $headerId (size: $bodySize)}');
       final bodyBytes = bodySize > 0 ? reader.readBytes(bodySize) : null;
-      _logger.finer(
-          'Read header ${fields[headerId]}: ${ByteUtils.toHexList(bodyBytes)}');
+//      _logger.finer(
+//          'Read header ${fields[headerId]}: ${ByteUtils.toHexList(bodyBytes)}');
       if (headerId > 0) {
         final TE field = fields[headerId];
         yield createField(field, bodyBytes);