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@ -5,6 +5,7 @@ import 'dart:typed_data';
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import 'package:archive/archive.dart'; |
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import 'package:argon2_ffi_base/argon2_ffi_base.dart'; |
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import 'package:collection/collection.dart' show IterableExtension; |
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import 'package:convert/convert.dart' as convert; |
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import 'package:crypto/crypto.dart' as crypto; |
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import 'package:kdbx/kdbx.dart'; |
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@ -36,7 +37,7 @@ final _logger = Logger('kdbx.format');
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abstract class Credentials { |
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factory Credentials(ProtectedValue password) => |
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Credentials.composite(password, null); //PasswordCredentials(password); |
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factory Credentials.composite(ProtectedValue password, Uint8List keyFile) => |
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factory Credentials.composite(ProtectedValue password, Uint8List? keyFile) => |
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KeyFileComposite( |
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password: password == null ? null : PasswordCredentials(password), |
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keyFile: keyFile == null ? null : KeyFileCredentials(keyFile), |
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@ -48,10 +49,10 @@ abstract class Credentials {
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} |
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class KeyFileComposite implements Credentials { |
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KeyFileComposite({@required this.password, @required this.keyFile}); |
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KeyFileComposite({required this.password, required this.keyFile}); |
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PasswordCredentials password; |
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KeyFileCredentials keyFile; |
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PasswordCredentials? password; |
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KeyFileCredentials? keyFile; |
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@override |
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Uint8List getHash() { |
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@ -70,8 +71,8 @@ class KeyFileComposite implements Credentials {
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/// Context used during reading and writing. |
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class KdbxReadWriteContext { |
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KdbxReadWriteContext({ |
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@required List<KdbxBinary> binaries, |
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@required this.header, |
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required List<KdbxBinary> binaries, |
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required this.header, |
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}) : assert(binaries != null), |
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assert(header != null), |
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_binaries = binaries, |
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@ -80,7 +81,7 @@ class KdbxReadWriteContext {
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static final kdbxContext = Expando<KdbxReadWriteContext>(); |
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static KdbxReadWriteContext kdbxContextForNode(xml.XmlNode node) { |
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final ret = kdbxContext[node.document]; |
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final ret = kdbxContext[node.document!]; |
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if (ret == null) { |
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throw StateError('Unable to locate kdbx context for document.'); |
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} |
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@ -89,7 +90,7 @@ class KdbxReadWriteContext {
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static void setKdbxContextForNode( |
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xml.XmlNode node, KdbxReadWriteContext ctx) { |
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kdbxContext[node.document] = ctx; |
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kdbxContext[node.document!] = ctx; |
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} |
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// TODO make [_binaries] and [_deletedObjects] late init :-) |
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@ -109,7 +110,7 @@ class KdbxReadWriteContext {
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_deletedObjects.addAll(deletedObjects); |
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} |
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KdbxBinary binaryById(int id) { |
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KdbxBinary? binaryById(int id) { |
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if (id >= _binaries.length) { |
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return null; |
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} |
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@ -120,21 +121,20 @@ class KdbxReadWriteContext {
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_binaries.add(binary); |
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} |
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KdbxBinary findBinaryByValue(KdbxBinary binary) { |
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KdbxBinary? findBinaryByValue(KdbxBinary binary) { |
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// TODO create a hashset or map? |
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return _binaries.firstWhere((element) => element.valueEqual(binary), |
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orElse: () => null); |
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return _binaries.firstWhereOrNull((element) => element.valueEqual(binary)); |
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} |
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/// finds the ID of the given binary. |
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/// if it can't be found, [KdbxCorruptedFileException] is thrown. |
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int findBinaryId(KdbxBinary binary) { |
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assert(binary != null); |
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assert(!binary.isInline); |
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assert(!binary.isInline!); |
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final id = _binaries.indexOf(binary); |
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if (id < 0) { |
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throw KdbxCorruptedFileException('Unable to find binary.' |
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' (${binary.value.length},${binary.isInline})'); |
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' (${binary.value!.length},${binary.isInline})'); |
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} |
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return id; |
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} |
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@ -244,7 +244,7 @@ class KdbxBody extends KdbxNode {
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final xmlBytes = utf8.encode(xml.toXmlString()); |
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final compressedBytes = (kdbxFile.header.compression == Compression.gzip |
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? KdbxFormat._gzipEncode(xmlBytes as Uint8List) |
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: xmlBytes) as Uint8List; |
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: xmlBytes) as Uint8List?; |
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final encrypted = await _encryptV3(kdbxFile, compressedBytes); |
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writer.writeBytes(encrypted); |
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@ -271,34 +271,34 @@ class KdbxBody extends KdbxNode {
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} |
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Future<Uint8List> _encryptV3( |
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KdbxFile kdbxFile, Uint8List compressedBytes) async { |
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KdbxFile kdbxFile, Uint8List? compressedBytes) async { |
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final byteWriter = WriterHelper(); |
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byteWriter.writeBytes( |
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kdbxFile.header.fields[HeaderFields.StreamStartBytes].bytes); |
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kdbxFile.header.fields[HeaderFields.StreamStartBytes]!.bytes!); |
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HashedBlockReader.writeBlocks(ReaderHelper(compressedBytes), byteWriter); |
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final bytes = byteWriter.output.toBytes(); |
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final masterKey = await KdbxFormat._generateMasterKeyV3( |
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kdbxFile.header, kdbxFile.credentials); |
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final encrypted = KdbxFormat._encryptDataAes(masterKey, bytes, |
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kdbxFile.header.fields[HeaderFields.EncryptionIV].bytes); |
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kdbxFile.header.fields[HeaderFields.EncryptionIV]!.bytes!); |
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return encrypted; |
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} |
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Uint8List _encryptV4( |
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KdbxFile kdbxFile, Uint8List compressedBytes, Uint8List cipherKey) { |
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KdbxFile kdbxFile, Uint8List? compressedBytes, Uint8List cipherKey) { |
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final header = kdbxFile.header; |
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final cipher = header.cipher; |
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if (cipher == Cipher.aes) { |
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_logger.fine('We need AES'); |
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final result = kdbxFile.kdbxFormat |
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._encryptContentV4Aes(header, cipherKey, compressedBytes); |
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._encryptContentV4Aes(header, cipherKey, compressedBytes!); |
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// _logger.fine('Result: ${ByteUtils.toHexList(result)}'); |
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return result; |
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} else if (cipher == Cipher.chaCha20) { |
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_logger.fine('We need chacha20'); |
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return kdbxFile.kdbxFormat |
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.transformContentV4ChaCha20(header, compressedBytes, cipherKey); |
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.transformContentV4ChaCha20(header, compressedBytes!, cipherKey); |
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} else { |
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throw UnsupportedError('Unsupported cipherId $cipher'); |
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} |
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@ -314,7 +314,7 @@ class KdbxBody extends KdbxNode {
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// sync deleted objects. |
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final deleted = |
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Map.fromEntries(ctx._deletedObjects.map((e) => MapEntry(e.uuid, e))); |
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final incomingDeleted = <KdbxUuid, KdbxDeletedObject>{}; |
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final incomingDeleted = <KdbxUuid?, KdbxDeletedObject>{}; |
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for (final obj in other.ctx._deletedObjects) { |
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if (!deleted.containsKey(obj.uuid)) { |
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@ -335,7 +335,7 @@ class KdbxBody extends KdbxNode {
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if (ctx.findBinaryByValue(binary) == null) { |
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ctx.addBinary(binary); |
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mergeContext.trackChange(this, |
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debug: 'adding new binary ${binary.value.length}'); |
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debug: 'adding new binary ${binary.value!.length}'); |
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} |
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} |
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meta.merge(other.meta); |
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@ -343,7 +343,7 @@ class KdbxBody extends KdbxNode {
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// remove deleted objects |
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for (final incomingDelete in incomingDeleted.values) { |
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final object = mergeContext.objectIndex[incomingDelete.uuid]; |
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final object = mergeContext.objectIndex![incomingDelete.uuid!]; |
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mergeContext.trackChange(object, debug: 'was deleted.'); |
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} |
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@ -352,11 +352,11 @@ class KdbxBody extends KdbxNode {
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_logger.info('Finished merging:\n${mergeContext.debugChanges()}'); |
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final incomingObjects = other._createObjectIndex(); |
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_logger.info('Merged: ${mergeContext.merged} vs. ' |
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'(local objects: ${mergeContext.objectIndex.length}, ' |
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'(local objects: ${mergeContext.objectIndex!.length}, ' |
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'incoming objects: ${incomingObjects.length})'); |
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// sanity checks |
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if (mergeContext.merged.keys.length != mergeContext.objectIndex.length) { |
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if (mergeContext.merged.keys.length != mergeContext.objectIndex!.length) { |
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// TODO figure out what went wrong. |
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} |
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return mergeContext; |
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@ -411,23 +411,23 @@ class KdbxBody extends KdbxNode {
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abstract class OverwriteContext { |
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const OverwriteContext(); |
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static const noop = OverwriteContextNoop(); |
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void trackChange(KdbxObject object, {String node, String debug}); |
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void trackChange(KdbxObject object, {String? node, String? debug}); |
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} |
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class OverwriteContextNoop implements OverwriteContext { |
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const OverwriteContextNoop(); |
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@override |
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void trackChange(KdbxObject object, {String node, String debug}) {} |
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void trackChange(KdbxObject object, {String? node, String? debug}) {} |
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} |
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class MergeChange { |
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MergeChange({this.object, this.node, this.debug}); |
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final KdbxNode object; |
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final KdbxNode? object; |
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/// the name of the subnode of [object]. |
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final String node; |
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final String debug; |
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final String? node; |
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final String? debug; |
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String debugString() { |
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return [node, debug].where((e) => e != null).join(' '); |
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@ -436,8 +436,8 @@ class MergeChange {
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class MergeContext implements OverwriteContext { |
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MergeContext({this.objectIndex, this.deletedObjects}); |
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final Map<KdbxUuid, KdbxObject> objectIndex; |
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final Map<KdbxUuid, KdbxDeletedObject> deletedObjects; |
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final Map<KdbxUuid, KdbxObject>? objectIndex; |
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final Map<KdbxUuid?, KdbxDeletedObject>? deletedObjects; |
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final Map<KdbxUuid, KdbxObject> merged = {}; |
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final List<MergeChange> changes = []; |
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@ -450,7 +450,7 @@ class MergeContext implements OverwriteContext {
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} |
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@override |
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void trackChange(KdbxNode object, {String node, String debug}) { |
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void trackChange(KdbxNode? object, {String? node, String? debug}) { |
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changes.add(MergeChange( |
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object: object, |
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node: node, |
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@ -480,7 +480,7 @@ class _KeysV4 {
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class KdbxFormat { |
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KdbxFormat([this.argon2]) : assert(kdbxKeyCommonAssertConsistency()); |
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final Argon2 argon2; |
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final Argon2? argon2; |
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static bool dartWebWorkaround = false; |
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/// Creates a new, empty [KdbxFile] with default settings. |
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@ -488,8 +488,8 @@ class KdbxFormat {
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KdbxFile create( |
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Credentials credentials, |
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String name, { |
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String generator, |
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KdbxHeader header, |
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String? generator, |
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KdbxHeader? header, |
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}) { |
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header ??= argon2 == null ? KdbxHeader.createV3() : KdbxHeader.createV4(); |
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final ctx = KdbxReadWriteContext(binaries: [], header: header); |
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@ -546,7 +546,7 @@ class KdbxFormat {
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throw UnsupportedError('Unsupported version ${header.version}'); |
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} else if (file.header.version < KdbxVersion.V4) { |
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final streamKey = |
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file.header.fields[HeaderFields.ProtectedStreamKey].bytes; |
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file.header.fields[HeaderFields.ProtectedStreamKey]!.bytes!; |
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final gen = ProtectedSaltGenerator(streamKey); |
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body.meta.headerHash.set(headerHash.buffer); |
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@ -712,7 +712,7 @@ class KdbxFormat {
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Uint8List transformContentV4ChaCha20( |
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KdbxHeader header, Uint8List encrypted, Uint8List cipherKey) { |
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final encryptionIv = header.fields[HeaderFields.EncryptionIV].bytes; |
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final encryptionIv = header.fields[HeaderFields.EncryptionIV]!.bytes!; |
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final chaCha = ChaCha7539Engine() |
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..init(true, ParametersWithIV(KeyParameter(cipherKey), encryptionIv)); |
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return chaCha.process(encrypted); |
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@ -735,7 +735,7 @@ class KdbxFormat {
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Future<_KeysV4> _computeKeysV4( |
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KdbxHeader header, Credentials credentials) async { |
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final masterSeed = header.fields[HeaderFields.MasterSeed].bytes; |
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final masterSeed = header.fields[HeaderFields.MasterSeed]!.bytes!; |
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final kdfParameters = header.readKdfParameters; |
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if (masterSeed.length != 32) { |
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throw const FormatException('Master seed must be 32 bytes.'); |
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@ -743,7 +743,7 @@ class KdbxFormat {
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final credentialHash = credentials.getHash(); |
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final key = |
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await KeyEncrypterKdf(argon2).encrypt(credentialHash, kdfParameters); |
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await KeyEncrypterKdf(argon2!).encrypt(credentialHash, kdfParameters); |
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// final keyWithSeed = Uint8List(65); |
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// keyWithSeed.replaceRange(0, masterSeed.length, masterSeed); |
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@ -762,9 +762,9 @@ class KdbxFormat {
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final protectedValueEncryption = header.innerRandomStreamEncryption; |
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final streamKey = header.protectedStreamKey; |
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if (protectedValueEncryption == ProtectedValueEncryption.salsa20) { |
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return ProtectedSaltGenerator(streamKey); |
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return ProtectedSaltGenerator(streamKey!); |
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} else if (protectedValueEncryption == ProtectedValueEncryption.chaCha20) { |
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return ProtectedSaltGenerator.chacha20(streamKey); |
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return ProtectedSaltGenerator.chacha20(streamKey!); |
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} else { |
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throw KdbxUnsupportedException( |
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'Inner encryption: $protectedValueEncryption'); |
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@ -789,7 +789,7 @@ class KdbxFormat {
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KdbxFile.protectedValues[el] = ProtectedValue.fromString(pw); |
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} catch (e, stackTrace) { |
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final stringKey = |
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el.parentElement.singleElement(KdbxXml.NODE_KEY)?.text; |
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el.parentElement!.singleElement(KdbxXml.NODE_KEY)?.text; |
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final uuid = el.parentElement?.parentElement |
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?.singleElement(KdbxXml.NODE_UUID) |
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?.text; |
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@ -811,14 +811,14 @@ class KdbxFormat {
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final kdbxMeta = KdbxMeta.read(meta, ctx); |
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// kdbx < 4 has binaries in the meta section, >= 4 in the binary header. |
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final binaries = kdbxMeta.binaries?.isNotEmpty == true |
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? kdbxMeta.binaries |
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? kdbxMeta.binaries! |
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: header.innerHeader.binaries |
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.map((e) => KdbxBinary.readBinaryInnerHeader(e)); |
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final deletedObjects = root |
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.findElements(KdbxXml.NODE_DELETED_OBJECTS) |
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.singleOrNull |
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?.let((el) => el |
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?.let((el) => el! |
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.findElements(KdbxDeletedObject.NODE_NAME) |
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.map((node) => KdbxDeletedObject.read(node, ctx))) ?? |
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[]; |
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@ -832,14 +832,14 @@ class KdbxFormat {
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Uint8List _decryptContent( |
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KdbxHeader header, Uint8List masterKey, Uint8List encryptedPayload) { |
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final encryptionIv = header.fields[HeaderFields.EncryptionIV].bytes; |
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final encryptionIv = header.fields[HeaderFields.EncryptionIV]!.bytes!; |
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final decryptCipher = CBCBlockCipher(AESFastEngine()); |
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decryptCipher.init( |
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false, ParametersWithIV(KeyParameter(masterKey), encryptionIv)); |
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final paddedDecrypted = |
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AesHelper.processBlocks(decryptCipher, encryptedPayload); |
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final streamStart = header.fields[HeaderFields.StreamStartBytes].bytes; |
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final streamStart = header.fields[HeaderFields.StreamStartBytes]!.bytes!; |
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if (paddedDecrypted.lengthInBytes < streamStart.lengthInBytes) { |
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_logger.warning( |
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@ -861,7 +861,7 @@ class KdbxFormat {
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Uint8List _decryptContentV4( |
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KdbxHeader header, Uint8List cipherKey, Uint8List encryptedPayload) { |
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final encryptionIv = header.fields[HeaderFields.EncryptionIV].bytes; |
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final encryptionIv = header.fields[HeaderFields.EncryptionIV]!.bytes!; |
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final decryptCipher = CBCBlockCipher(AESFastEngine()); |
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decryptCipher.init( |
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@ -876,7 +876,7 @@ class KdbxFormat {
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/// TODO combine this with [_decryptContentV4] (or [_encryptDataAes]?) |
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Uint8List _encryptContentV4Aes( |
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KdbxHeader header, Uint8List cipherKey, Uint8List bytes) { |
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final encryptionIv = header.fields[HeaderFields.EncryptionIV].bytes; |
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final encryptionIv = header.fields[HeaderFields.EncryptionIV]!.bytes!; |
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final encryptCypher = CBCBlockCipher(AESFastEngine()); |
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encryptCypher.init( |
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true, ParametersWithIV(KeyParameter(cipherKey), encryptionIv)); |
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@ -887,10 +887,10 @@ class KdbxFormat {
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static Future<Uint8List> _generateMasterKeyV3( |
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KdbxHeader header, Credentials credentials) async { |
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final rounds = header.v3KdfTransformRounds; |
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final seed = header.fields[HeaderFields.TransformSeed].bytes; |
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final masterSeed = header.fields[HeaderFields.MasterSeed].bytes; |
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final seed = header.fields[HeaderFields.TransformSeed]!.bytes; |
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final masterSeed = header.fields[HeaderFields.MasterSeed]!.bytes!; |
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_logger.finer( |
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'Rounds: $rounds (${ByteUtils.toHexList(header.fields[HeaderFields.TransformRounds].bytes)})'); |
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'Rounds: $rounds (${ByteUtils.toHexList(header.fields[HeaderFields.TransformRounds]!.bytes)})'); |
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final transformedKey = await KeyEncrypterKdf.encryptAesAsync( |
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EncryptAesArgs(seed, credentials.getHash(), rounds)); |
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@ -909,9 +909,9 @@ class KdbxFormat {
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encryptCipher, AesHelper.pad(payload, encryptCipher.blockSize)); |
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} |
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static Uint8List _gzipEncode(Uint8List bytes) { |
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static Uint8List? _gzipEncode(Uint8List bytes) { |
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if (dartWebWorkaround) { |
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return GZipEncoder().encode(bytes) as Uint8List; |
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return GZipEncoder().encode(bytes) as Uint8List?; |
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} |
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return GZipCodec().encode(bytes) as Uint8List; |
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} |
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Herbert Poul
4 years ago