generate times node (access times, etc.)

lib/src/kdbx_entry.dart

@@ -38,8 +38,9 @@ class KdbxEntry extends KdbxObject {
     }));
   }
 
+  @override
   XmlElement toXml() {
-    final el = node.copy() as XmlElement;
+    final el = super.toXml();
     el.children.removeWhere((e) => e is XmlElement && e.name.local == 'String');
     el.children.addAll(strings.entries.map((stringEntry) {
       final value = XmlElement(XmlName('Value'));

lib/src/kdbx_format.dart

@@ -92,7 +92,7 @@ class KdbxBody extends KdbxNode {
     meta.headerHash.set(
         (crypto.sha256.convert(writer.output.toBytes()).bytes as Uint8List)
             .buffer);
-    final xml = toXml(saltGenerator);
+    final xml = generateXml(saltGenerator);
     final xmlBytes = utf8.encode(xml.toXmlString());
     final Uint8List compressedBytes = (kdbxFile.header.compression == Compression.gzip ?
       GZipCodec().encode(xmlBytes) : xmlBytes) as Uint8List;
@@ -108,7 +108,7 @@ class KdbxBody extends KdbxNode {
     writer.writeBytes(encrypted);
   }
 
-  xml.XmlDocument toXml(ProtectedSaltGenerator saltGenerator) {
+  xml.XmlDocument generateXml(ProtectedSaltGenerator saltGenerator) {
     final rootGroupNode = rootGroup.toXml();
     // update protected values...
     for (final el in rootGroupNode
@@ -150,8 +150,10 @@ class KdbxMeta extends KdbxNode {
 
   Base64Node get headerHash => Base64Node(this, 'HeaderHash');
 
+  @override
+  // ignore: unnecessary_overrides
   xml.XmlElement toXml() {
-    return node;
+    return super.toXml();
   }
 }
 
@@ -223,7 +225,7 @@ class KdbxFormat {
     decryptCipher.init(false,
         ParametersWithIV(KeyParameter(masterKey), encryptionIv.asUint8List()));
     final paddedDecrypted = AesHelper.processBlocks(decryptCipher, encryptedPayload);
-    final decrypted = paddedDecrypted;//AesHelper.unpad(paddedDecrypted);
+    final decrypted = AesHelper.unpad(paddedDecrypted);
 
     final streamStart = header.fields[HeaderFields.StreamStartBytes].bytes;
 
@@ -236,6 +238,7 @@ class KdbxFormat {
         decrypted.sublist(0, streamStart.lengthInBytes))) {
       throw KdbxInvalidKeyException();
     }
+    // ignore: unnecessary_cast
     final content = decrypted.sublist(streamStart.lengthInBytes) as Uint8List;
     return content;
   }

lib/src/kdbx_group.dart

@@ -24,8 +24,9 @@ class KdbxGroup extends KdbxObject {
         .forEach(_entries.add);
   }
   
+  @override
   XmlElement toXml() {
-    final el = node.copy() as XmlElement;
+    final el = super.toXml();
     XmlUtils.removeChildrenByName(el, 'Group');
     XmlUtils.removeChildrenByName(el, 'Entry');
     el.children.addAll(groups.map((g) => g.toXml()));

lib/src/kdbx_header.dart

@@ -1,4 +1,3 @@
-import 'dart:math';
 import 'dart:typed_data';
 
 import 'package:crypto/crypto.dart' as crypto;
@@ -6,7 +5,6 @@ import 'package:kdbx/src/internal/byte_utils.dart';
 import 'package:kdbx/src/internal/consts.dart';
 import 'package:logging/logging.dart';
 import 'package:meta/meta.dart';
-import 'package:pointycastle/api.dart';
 
 final _logger = Logger('kdbx.header');
 
@@ -266,6 +264,7 @@ class HashedBlockReader {
 
   static Iterable<Uint8List> readNextBlock(ReaderHelper reader) sync* {
     while (true) {
+      // ignore: unused_local_variable
       final blockIndex = reader.readUint32();
       final blockHash = reader.readBytes(HASH_SIZE);
       final blockSize = reader.readUint32();

lib/src/kdbx_object.dart

@@ -1,22 +1,13 @@
 import 'dart:convert';
 import 'dart:typed_data';
 
+import 'package:kdbx/src/kdbx_times.dart';
 import 'package:kdbx/src/kdbx_xml.dart';
+import 'package:meta/meta.dart';
 import 'package:uuid/uuid.dart';
 import 'package:uuid/uuid_util.dart';
 import 'package:xml/xml.dart';
 
-class KdbxTimes {
-  KdbxTimes.read(this.node);
-
-  XmlElement node;
-
-  DateTime get creationTime => _readTime('CreationTime');
-
-  DateTime _readTime(String nodeName) =>
-      DateTime.parse(node.findElements(nodeName).single.text);
-}
-
 abstract class KdbxNode {
   KdbxNode.create(String nodeName) : node = XmlElement(XmlName(nodeName));
 
@@ -29,21 +20,35 @@ abstract class KdbxNode {
 
   KdbxSubTextNode textNode(String nodeName) => StringNode(this, nodeName);
 
+  @mustCallSuper
+  XmlElement toXml() {
+    final el = node.copy() as XmlElement;
+    return el;
+  }
 }
 
-
 abstract class KdbxObject extends KdbxNode {
   KdbxObject.create(String nodeName)
-      : super.create(nodeName) {
+      : times = KdbxTimes.create(), super.create(nodeName) {
     _uuid.set(KdbxUuid.random());
   }
 
-  KdbxObject.read(XmlElement node) : super.read(node);
+  KdbxObject.read(XmlElement node) : times = KdbxTimes.read(node.findElements('Times').single),super.read(node);
+
+  final KdbxTimes times;
 
   KdbxUuid get uuid => _uuid.get();
   UuidNode get _uuid => UuidNode(this, 'UUID');
 
   IconNode get icon => IconNode(this, 'IconID');
+
+  @override
+  XmlElement toXml() {
+    final el = super.toXml();
+    XmlUtils.removeChildrenByName(el, 'Times');
+    el.children.add(times.toXml());
+    return el;
+  }
 }
 
 class KdbxUuid {

lib/src/kdbx_times.dart

@@ -0,0 +1,32 @@
+
+
+import 'package:clock/clock.dart';
+import 'package:kdbx/src/kdbx_object.dart';
+import 'package:kdbx/src/kdbx_xml.dart';
+import 'package:xml/xml.dart';
+
+class KdbxTimes extends KdbxNode {
+  KdbxTimes.create() : super.create('Times') {
+    final now = clock.now().toUtc();
+    creationTime.set(now);
+    lastModificationTime.set(now);
+    lastAccessTime.set(now);
+    expiryTime.set(now);
+    expires.set(false);
+    usageCount.set(0);
+    locationChanged.set(now);
+  }
+  KdbxTimes.read(XmlElement node) : super.read(node);
+
+  DateTimeUtcNode get creationTime => DateTimeUtcNode(this, 'CreationTime');
+  DateTimeUtcNode get lastModificationTime => DateTimeUtcNode(this, 'CreationTime');
+  DateTimeUtcNode get lastAccessTime => DateTimeUtcNode(this, 'CreationTime');
+  DateTimeUtcNode get expiryTime => DateTimeUtcNode(this, 'CreationTime');
+  BooleanNode get expires => BooleanNode(this, 'Expires');
+  IntNode get usageCount => IntNode(this, 'Usagecount');
+  DateTimeUtcNode get locationChanged => DateTimeUtcNode(this, 'LocationChanged');
+
+  void accessedNow() {
+    lastAccessTime.set(clock.now());
+  }
+}

lib/src/kdbx_xml.dart

@@ -26,8 +26,9 @@ abstract class KdbxSubTextNode<T> extends KdbxSubNode<T> {
   @protected
   T decode(String value);
 
-  XmlElement _opt(String nodeName) =>
-      node.node.findElements(nodeName).singleWhere((x) => true, orElse: () => null);
+  XmlElement _opt(String nodeName) => node.node
+      .findElements(nodeName)
+      .singleWhere((x) => true, orElse: () => null);
 
   @override
   T get() {
@@ -41,7 +42,7 @@ abstract class KdbxSubTextNode<T> extends KdbxSubNode<T> {
   @override
   void set(T value) {
     final el =
-    node.node.findElements(name).singleWhere((x) => true, orElse: () {
+        node.node.findElements(name).singleWhere((x) => true, orElse: () {
       final el = XmlElement(XmlName(name));
       node.node.children.add(el);
       return el;
@@ -58,6 +59,16 @@ abstract class KdbxSubTextNode<T> extends KdbxSubNode<T> {
   }
 }
 
+class IntNode extends KdbxSubTextNode<int> {
+  IntNode(KdbxNode node, String name) : super(node, name);
+
+  @override
+  int decode(String value) => int.tryParse(value);
+
+  @override
+  String encode(int value) => value.toString();
+}
+
 class StringNode extends KdbxSubTextNode<String> {
   StringNode(KdbxNode node, String name) : super(node, name);
 
@@ -104,20 +115,73 @@ class BooleanNode extends KdbxSubTextNode<bool> {
   @override
   bool decode(String value) {
     switch (value) {
-      case 'null': return null;
-      case 'true': return true;
-      case 'false': return false;
+      case 'null':
+        return null;
+      case 'true':
+        return true;
+      case 'false':
+        return false;
     }
     throw KdbxCorruptedFileException('Invalid boolean value $value for $name');
   }
 
   @override
   String encode(bool value) => value ? 'true' : 'false';
+}
+
+class DateTimeUtcNode extends KdbxSubTextNode<DateTime> {
+  DateTimeUtcNode(KdbxNode node, String name) : super(node, name);
+
+  @override
+  DateTime decode(String value) => DateTime.parse(value);
+
+  @override
+  String encode(DateTime value) {
+    assert(value.isUtc);
 
+    // TODO for kdbx v4 we need to support binary/base64
+    return DateTimeUtils.toIso8601StringSeconds(value);
+  }
 }
 
 class XmlUtils {
   static void removeChildrenByName(XmlNode node, String name) {
-    node.children.removeWhere((node) => node is XmlElement && node.name.local == name);
+    node.children
+        .removeWhere((node) => node is XmlElement && node.name.local == name);
+  }
+}
+
+class DateTimeUtils {
+  static String toIso8601StringSeconds(DateTime dateTime) {
+    final String y = _fourDigits(dateTime.year);
+    final String m = _twoDigits(dateTime.month);
+    final String d = _twoDigits(dateTime.hour);
+    final String h = _twoDigits(dateTime.hour);
+    final String min = _twoDigits(dateTime.minute);
+    final String sec = _twoDigits(dateTime.second);
+    return '$y-$m-${d}T$h:$min:${sec}Z';
+  }
+
+  static String _fourDigits(int n) {
+    final absN = n.abs();
+    final sign = n < 0 ? '-' : '';
+    // ignore: prefer_single_quotes
+    if (absN >= 1000) {
+      return '$n';
+    }
+    if (absN >= 100) {
+      return '${sign}0$absN';
+    }
+    if (absN >= 10) {
+      return '${sign}00$absN';
+    }
+    return '${sign}000$absN';
+  }
+
+  static String _twoDigits(int n) {
+    if (n >= 10) {
+      return '$n';
+    }
+    return '0$n';
   }
 }

pubspec.yaml

@@ -15,6 +15,7 @@ dependencies:
   xml: '>=3.5.0 <4.0.0'
   uuid: '>=2.0.0 <3.0.0'
   meta: '>=1.0.0 <2.0.0'
+  clock: '>=1.0.0 <2.0.0'
 
   collection: '>=1.14.0 <2.0.0'
 

test/kdbx_test.dart

@@ -38,7 +38,7 @@ void main() {
       expect(kdbx.body.rootGroup, isNotNull);
       expect(kdbx.body.rootGroup.name.get(), 'CreateTest');
       expect(kdbx.body.meta.databaseName.get(), 'CreateTest');
-      print(kdbx.body.toXml(FakeProtectedSaltGenerator()).toXmlString(pretty: true));
+      print(kdbx.body.generateXml(FakeProtectedSaltGenerator()).toXmlString(pretty: true));
     });
     test('Create Entry', () {
       final kdbx = KdbxFormat.create(Credentials(ProtectedValue.fromString('FooBar')), 'CreateTest');
@@ -46,14 +46,14 @@ void main() {
       final entry = KdbxEntry.create(rootGroup);
       rootGroup.addEntry(entry);
       entry.setString(KdbxKey('Password'), ProtectedValue.fromString('LoremIpsum'));
-      print(kdbx.body.toXml(FakeProtectedSaltGenerator()).toXmlString(pretty: true));
+      print(kdbx.body.generateXml(FakeProtectedSaltGenerator()).toXmlString(pretty: true));
     });
   });
 
   group('Integration', () {
     test('Simple save and load', () {
       final credentials = Credentials(ProtectedValue.fromString('FooBar'));
-      Uint8List saved = (() {
+      final Uint8List saved = (() {
         final kdbx = KdbxFormat.create(credentials, 'CreateTest');
         final rootGroup = kdbx.body.rootGroup;
         final entry = KdbxEntry.create(rootGroup);
@@ -67,6 +67,7 @@ void main() {
 
       final kdbx = KdbxFormat.read(saved, credentials);
       expect(kdbx.body.rootGroup.entries.first.strings[KdbxKey('Password')].getText(), 'LoremIpsum');
+      File('test.kdbx').writeAsBytesSync(saved);
     });
   });
 }