Solve ssh connect slow

lib/data/provider/server.dart

@@ -17,6 +17,7 @@ import 'package:toolbox/data/model/server/server_private_info.dart';
 import 'package:toolbox/data/model/server/server_status.dart';
 import 'package:toolbox/data/model/server/snippet.dart';
 import 'package:toolbox/data/model/server/tcp_status.dart';
+import 'package:toolbox/data/store/private_key.dart';
 import 'package:toolbox/data/store/server.dart';
 import 'package:toolbox/data/store/setting.dart';
 import 'package:toolbox/locator.dart';
@@ -24,8 +25,8 @@ import 'package:toolbox/locator.dart';
 /// Must put this func out of any Class.
 /// Because of this function is called by [compute] in [ServerProvider.genClient].
 /// https://stackoverflow.com/questions/51998995/invalid-arguments-illegal-argument-in-isolate-message-object-is-a-closure
-List<SSHKeyPair> loadIndentity(Map<String, dynamic> auth) {
+List<SSHKeyPair> loadIndentity(String key) {
-  return SSHKeyPair.fromPem(auth['privateKey'], auth['passphrase']);
+  return SSHKeyPair.fromPem(key);
 }
 
 class ServerProvider extends BusyProvider {
@@ -73,14 +74,14 @@ class ServerProvider extends BusyProvider {
 
   Future<SSHClient> genClient(ServerPrivateInfo spi) async {
     final socket = await SSHSocket.connect(spi.ip, spi.port);
-    if (spi.authorization is String) {
+    if (spi.pubKeyId == null) {
       return SSHClient(socket,
           username: spi.user,
           onPasswordRequest: () => spi.authorization as String);
     }
-    final auth = spi.authorization as Map<String, dynamic>;
+    final key = locator<PrivateKeyStore>().get(spi.pubKeyId!);
     return SSHClient(socket,
-        username: spi.user, identities: await compute(loadIndentity, auth));
+        username: spi.user, identities: await compute(loadIndentity, key.privateKey));
   }
 
   Future<void> refreshData({int? idx}) async {

lib/data/res/build_data.dart

@@ -3,7 +3,8 @@
 class BuildData {
   static const String name = "ToolBox";
   static const int build = 79;
-  static const String engine = "Flutter 2.8.1 • channel stable • https://github.com/flutter/flutter.git\nFramework • revision 77d935af4d (4 weeks ago) • 2021-12-16 08:37:33 -0800\nEngine • revision 890a5fca2e\nTools • Dart 2.15.1\n";
+  static const String engine =
+      "Flutter 2.8.1 • channel stable • https://github.com/flutter/flutter.git\nFramework • revision 77d935af4d (4 weeks ago) • 2021-12-16 08:37:33 -0800\nEngine • revision 890a5fca2e\nTools • Dart 2.15.1\n";
   static const String buildAt = "2022-01-10 16:04:12.547744";
   static const int modifications = 0;
 }

lib/data/store/private_key.dart

@@ -15,6 +15,11 @@ class PrivateKeyStore extends PersistentStore {
         json.decode(box.get('key', defaultValue: '[]')!));
   }
 
+  PrivateKeyInfo get(String id) {
+    final ss = fetch();
+    return ss.firstWhere((e) => e.id == id);
+  }
+
   void delete(PrivateKeyInfo s) {
     final ss = fetch();
     ss.removeAt(index(s));

lib/view/page/private_key/edit.dart

@@ -1,4 +1,6 @@
 import 'package:after_layout/after_layout.dart';
+import 'package:dartssh2/dartssh2.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:toolbox/core/utils.dart';
 import 'package:toolbox/data/model/server/private_key_info.dart';
@@ -22,11 +24,13 @@ class _PrivateKeyEditPageState extends State<PrivateKeyEditPage>
   final pwdController = TextEditingController();
 
   late PrivateKeyProvider _provider;
+  late Widget loading;
 
   @override
   void initState() {
     super.initState();
     _provider = locator<PrivateKeyProvider>();
+    loading = const SizedBox();
   }
 
   @override
@@ -66,11 +70,13 @@ class _PrivateKeyEditPageState extends State<PrivateKeyEditPage>
             obscureText: true,
             decoration: buildDecoration('Password', icon: Icons.password),
           ),
+          SizedBox(height: MediaQuery.of(context).size.height * 0.1),
+          loading
         ],
       ),
       floatingActionButton: FloatingActionButton(
-        child: const Icon(Icons.send),
+        child: const Icon(Icons.save),
-        onPressed: () {
+        onPressed: () async {
           final name = nameController.text;
           final key = keyController.text;
           final pwd = pwdController.text;
@@ -79,7 +85,28 @@ class _PrivateKeyEditPageState extends State<PrivateKeyEditPage>
                 context, const Text('Three fields must not be empty.'));
             return;
           }
+          FocusScope.of(context).unfocus();
+          setState(() {
+            loading = const SizedBox(
+              height: 50,
+              child: Center(
+                child: CircularProgressIndicator(),
+              ),
+            );
+          });
           final info = PrivateKeyInfo(name, key, pwd);
+          bool haveErr = false;
+          try {
+            info.privateKey = await compute(decyptPem, [key, pwd]);
+          } catch (e) {
+            showSnackBar(context, Text(e.toString()));
+            haveErr = true;
+          } finally {
+            setState(() {
+              loading = const SizedBox();
+            });
+          }
+          if (haveErr) return;
           if (widget.info != null) {
             _provider.updateInfo(widget.info!, info);
           } else {
@@ -100,3 +127,11 @@ class _PrivateKeyEditPageState extends State<PrivateKeyEditPage>
     }
   }
 }
+
+/// [args] : [key, pwd]
+String decyptPem(List<String> args) {
+  /// skip when the key is not encrypted, or will throw exception
+  if (!SSHKeyPair.isEncryptedPem(args[0])) return args[0];
+  final sshKey = SSHKeyPair.fromPem(args[0], args[1]);
+  return sshKey.first.toPem();
+}

pubspec.lock

@@ -123,7 +123,7 @@ packages:
       name: dartssh2
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-pre"
+    version: "2.2.0"
   dio:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -42,7 +42,7 @@ dependencies:
     git: 
       url: https://github.com/Countly/countly-sdk-flutter-bridge.git
       ref: master
-  dartssh2: ^2.1.0-pre
+  dartssh2: ^2.2.0
   logging: ^1.0.2
   flutter_material_color_picker: ^1.1.0+2
   circle_chart: