parse kdbx file without futures.

bin/kdbx.dart

@@ -74,7 +74,7 @@ abstract class KdbxFileCommand extends Command<void> {
     final bytes = await File(inputFile).readAsBytes() as Uint8List;
     final password = prompts.get('Password for $inputFile',
         conceal: true, validate: (str) => str.isNotEmpty);
-    final file = await KdbxFormat.read(
+    final file = KdbxFormat.read(
         bytes, Credentials(ProtectedValue.fromString(password)));
     return runWithFile(file);
   }

lib/src/kdbx_entry.dart

@@ -1,12 +1,15 @@
+import 'package:collection/collection.dart';
 import 'package:kdbx/src/crypto/protected_value.dart';
 import 'package:kdbx/src/kdbx_format.dart';
 import 'package:kdbx/src/kdbx_group.dart';
 import 'package:kdbx/src/kdbx_object.dart';
 import 'package:xml/xml.dart';
 
+String _canonicalizeKey(String key) => key?.toLowerCase();
+
 class KdbxEntry extends KdbxObject {
   KdbxEntry.read(this.parent, XmlElement node) : super.read(node) {
-    strings = Map.fromEntries(node.findElements('String').map((el) {
+    strings.addEntries(node.findElements('String').map((el) {
       final key = el.findElements('Key').single.text;
       final valueNode = el.findElements('Value').single;
       if (valueNode.getAttribute('Protected')?.toLowerCase() == 'true') {
@@ -18,7 +21,8 @@ class KdbxEntry extends KdbxObject {
   }
 
   KdbxGroup parent;
-  Map<String, StringValue> strings;
+  Map<String, StringValue> strings =
+      CanonicalizedMap<String, String, StringValue>(_canonicalizeKey);
 
   String _plainValue(String key) {
     final value = strings[key];

lib/src/kdbx_format.dart

@@ -61,9 +61,9 @@ class KdbxMeta extends KdbxNode {
 }
 
 class KdbxFormat {
-  static Future<KdbxFile> read(Uint8List input, Credentials credentials) async {
+  static KdbxFile read(Uint8List input, Credentials credentials) {
     final reader = ReaderHelper(input);
-    final header = await KdbxHeader.read(reader);
+    final header = KdbxHeader.read(reader);
     return _loadV3(header, reader, credentials);
   }
 

lib/src/kdbx_header.dart

@@ -1,8 +1,6 @@
 import 'dart:typed_data';
 
-import 'package:convert/convert.dart' as convert;
 import 'package:crypto/crypto.dart' as crypto;
-import 'package:kdbx/src/crypto/protected_value.dart';
 import 'package:kdbx/src/internal/byte_utils.dart';
 import 'package:logging/logging.dart';
 
@@ -51,14 +49,21 @@ class HeaderField {
 }
 
 class KdbxHeader {
-  KdbxHeader({this.sig1, this.sig2, this.versionMinor, this.versionMajor, this.fields});
+  KdbxHeader(
-
+      {this.sig1,
-  static Future<KdbxHeader> read(ReaderHelper reader) async {
+      this.sig2,
+      this.versionMinor,
+      this.versionMajor,
+      this.fields});
+
+  static KdbxHeader read(ReaderHelper reader) {
     // reading signature
     final sig1 = reader.readUint32();
     final sig2 = reader.readUint32();
     if (!(sig1 == Consts.FileMagic && sig2 == Consts.Sig2Kdbx)) {
-      throw UnsupportedError('Unsupported file structure. ${ByteUtils.toHex(sig1)}, ${ByteUtils.toHex(sig2)}');
+      throw UnsupportedError(
+          'Unsupported file structure. ${ByteUtils.toHex(sig1)}, '
+          '${ByteUtils.toHex(sig2)}');
     }
 
     // reading version
@@ -66,7 +71,8 @@ class KdbxHeader {
     final versionMajor = reader.readUint16();
 
     _logger.finer('Reading version: $versionMajor.$versionMinor');
-    final headerFields = Map.fromEntries(readField(reader, versionMajor).map((field) => MapEntry(field.field, field)));
+    final headerFields = Map.fromEntries(readField(reader, versionMajor)
+        .map((field) => MapEntry(field.field, field)));
     return KdbxHeader(
       sig1: sig1,
       sig2: sig2,
@@ -76,10 +82,12 @@ class KdbxHeader {
     );
   }
 
-  static Iterable<HeaderField> readField(ReaderHelper reader, int versionMajor) sync* {
+  static Iterable<HeaderField> readField(
+      ReaderHelper reader, int versionMajor) sync* {
     while (true) {
       final headerId = reader.readUint8();
-      final int bodySize = versionMajor >= 4 ? reader.readUint32() : reader.readUint16();
+      final int bodySize =
+          versionMajor >= 4 ? reader.readUint32() : reader.readUint16();
       _logger.finer('Read header ${HeaderFields.values[headerId]}');
       final bodyBytes = bodySize > 0 ? reader.readBytes(bodySize) : null;
       if (headerId > 0) {
@@ -108,7 +116,8 @@ class KdbxHeader {
   }
 
   PotectedValueEncryption get innerRandomStreamEncryption =>
-      PotectedValueEncryption.values[fields[HeaderFields.InnerRandomStreamID].bytes.asUint32List().single];
+      PotectedValueEncryption.values[
+          fields[HeaderFields.InnerRandomStreamID].bytes.asUint32List().single];
 }
 
 class KdbxException implements Exception {}
@@ -134,7 +143,8 @@ class HashedBlockReader {
       final blockSize = reader.readUint32();
       if (blockSize > 0) {
         final blockData = reader.readBytes(blockSize).asUint8List();
-        if (!ByteUtils.eq(crypto.sha256.convert(blockData).bytes as Uint8List, blockHash.asUint8List())) {
+        if (!ByteUtils.eq(crypto.sha256.convert(blockData).bytes as Uint8List,
+            blockHash.asUint8List())) {
           throw KdbxCorruptedFileException();
         }
         yield blockData;
@@ -151,7 +161,8 @@ class ReaderHelper {
   final Uint8List data;
   int pos = 0;
 
-  ByteBuffer _nextByteBuffer(int byteCount) => (data.sublist(pos, pos += byteCount) as Uint8List).buffer;
+  ByteBuffer _nextByteBuffer(int byteCount) =>
+      (data.sublist(pos, pos += byteCount) as Uint8List).buffer;
 
   int readUint32() => _nextByteBuffer(4).asUint32List().first;
 

pubspec.yaml

@@ -16,6 +16,8 @@ dependencies:
   uuid: '>=2.0.0 <3.0.0'
   meta: '>=1.0.0 <2.0.0'
 
+  collection: '>=1.14.0 <2.0.0'
+
   # required for bin/
   args: '>1.5.0 <2.0.0'
   prompts: '>=1.3.0 <2.0.0'