feat: keyboard-interactive auth (#349)

lib/core/extension/context/dialog.dart

@@ -61,13 +61,16 @@ extension DialogX on BuildContext {
 
   static final _recoredPwd = <String, String>{};
 
+  /// Show a dialog to input password
+  ///
+  /// [hostId] set it to null to skip remembering the password
   Future<String?> showPwdDialog({
-    String? user,
-    required String hostId,
+    String? hostId,
+    String? title,
   }) async {
     if (!mounted) return null;
     return await showRoundDialog<String>(
-      title: Text(user ?? l10n.pwd),
+      title: Text(title ?? hostId ?? l10n.pwd),
       child: Input(
         controller: TextEditingController(text: _recoredPwd[hostId]),
         autoFocus: true,
@@ -75,7 +78,7 @@ extension DialogX on BuildContext {
         obscureText: true,
         onSubmitted: (val) {
           pop(val);
-          if (Stores.setting.rememberPwdInMem.fetch()) {
+          if (hostId != null && Stores.setting.rememberPwdInMem.fetch()) {
             _recoredPwd[hostId] = val;
           }
         },

lib/core/extension/ssh_client.dart

@@ -81,9 +81,9 @@ extension SSHClientX on SSHClient {
           isRequestingPwd = true;
           final user = Miscs.pwdRequestWithUserReg.firstMatch(data)?.group(1);
           if (context == null) return;
-          final pwd = await context.showPwdDialog(user: user, hostId: id);
+          final pwd = await context.showPwdDialog(title: user, hostId: id);
           if (pwd == null || pwd.isEmpty) {
-            session.kill(SSHSignal.INT);
+            session.kill(SSHSignal.TERM);
           } else {
             session.stdin.add('$pwd\n'.uint8List);
           }

lib/core/utils/auth.dart

@@ -0,0 +1,20 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:toolbox/core/extension/context/dialog.dart';
+import 'package:toolbox/data/model/server/server_private_info.dart';
+import 'package:toolbox/data/res/provider.dart';
+
+abstract final class KeybordInteractive {
+  static FutureOr<List<String>?> defaultHandle(
+    ServerPrivateInfo spi, {
+    BuildContext? ctx,
+  }) async {
+    try {
+      final res = await (ctx ?? Pros.app.ctx)?.showPwdDialog(title: spi.id);
+      return res == null ? null : [res];
+    } catch (e) {
+      return null;
+    }
+  }
+}

lib/core/utils/server.dart

@@ -56,6 +56,9 @@ Future<SSHClient> genClient(
   ///
   /// Must pass this param when use multi-thread and key login
   ServerPrivateInfo? jumpSpi,
+
+  /// Handle keyboard-interactive authentication
+  FutureOr<List<String>?> Function(SSHUserInfoRequest)? onKeyboardInteractive,
 }) async {
   onStatus?.call(GenSSHClientStatus.socket);
 
@@ -109,6 +112,9 @@ Future<SSHClient> genClient(
       socket,
       username: spi.user,
       onPasswordRequest: () => spi.pwd,
+      onUserInfoRequest: onKeyboardInteractive,
+      printDebug: debugPrint,
+      printTrace: debugPrint,
     );
   }
   privateKey ??= getPrivateKey(keyId);
@@ -119,5 +125,8 @@ Future<SSHClient> genClient(
     username: spi.user,
     // Must use [compute] here, instead of [Computer.shared.start]
     identities: await compute(loadIndentity, privateKey),
+    onUserInfoRequest: onKeyboardInteractive,
+    printDebug: debugPrint,
+    printTrace: debugPrint,
   );
 }