vs project add

.gitignore

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+# .gitignore
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+bld/
+[Bb]in/
+[Oo]bj/

SshHandler.sln

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+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{50924D75-2903-46D4-86DD-02269EFDBCA9}") = "SshHandler", "SshHandler\SshHandler.csproj", "{960BAB18-309B-42D0-B67E-B4EF8E7F7490}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{960BAB18-309B-42D0-B67E-B4EF8E7F7490}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{960BAB18-309B-42D0-B67E-B4EF8E7F7490}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{960BAB18-309B-42D0-B67E-B4EF8E7F7490}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{960BAB18-309B-42D0-B67E-B4EF8E7F7490}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

SshHandler/Form1.Designer.cs

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+partial class Form1
+{
+    /// <summary>
+    /// Required designer variable.
+    /// </summary>
+    private System.ComponentModel.IContainer components = null;
+
+    /// <summary>
+    /// Clean up any resources being used.
+    /// </summary>
+    /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+    protected override void Dispose(bool disposing)
+    {
+        if (disposing && (components != null))
+        {
+            components.Dispose();
+        }
+        base.Dispose(disposing);
+    }
+
+    #region Windows Form Designer generated code
+
+    /// <summary>
+    /// Required method for Designer support - do not modify
+    /// the contents of this method with the code editor.
+    /// </summary>
+    private void InitializeComponent()
+    {
+        this.label1 = new System.Windows.Forms.Label();
+        this.targetTextBox = new System.Windows.Forms.TextBox();
+        this.legacyCheckBox = new System.Windows.Forms.CheckBox();
+        this.connectButton = new System.Windows.Forms.Button();
+        this.cancelButton = new System.Windows.Forms.Button();
+        this.SuspendLayout();
+        // 
+        // label1
+        // 
+        this.label1.AutoSize = true;
+        this.label1.Location = new System.Drawing.Point(12, 15);
+        this.label1.Name = "label1";
+        this.label1.Size = new System.Drawing.Size(73, 15);
+        this.label1.TabIndex = 0;
+        this.label1.Text = "Connect to:";
+        // 
+        // targetTextBox
+        // 
+        this.targetTextBox.Location = new System.Drawing.Point(15, 33);
+        this.targetTextBox.Name = "targetTextBox";
+        this.targetTextBox.Size = new System.Drawing.Size(357, 23);
+        this.targetTextBox.TabIndex = 1;
+        // 
+        // legacyCheckBox
+        // 
+        this.legacyCheckBox.AutoSize = true;
+        this.legacyCheckBox.Location = new System.Drawing.Point(15, 71);
+        this.legacyCheckBox.Name = "legacyCheckBox";
+        this.legacyCheckBox.Size = new System.Drawing.Size(206, 19);
+        this.legacyCheckBox.TabIndex = 2;
+        this.legacyCheckBox.Text = "Enable Legacy Mode (for old devices)";
+        this.legacyCheckBox.UseVisualStyleBackColor = true;
+        // 
+        // connectButton
+        // 
+        this.connectButton.Location = new System.Drawing.Point(297, 106);
+        this.connectButton.Name = "connectButton";
+        this.connectButton.Size = new System.Drawing.Size(75, 23);
+        this.connectButton.TabIndex = 3;
+        this.connectButton.Text = "Connect";
+        this.connectButton.UseVisualStyleBackColor = true;
+        this.connectButton.Click += new System.EventHandler(this.connectButton_Click);
+        // 
+        // cancelButton
+        // 
+        this.cancelButton.DialogResult = System.Windows.Forms.DialogResult.Cancel;
+        this.cancelButton.Location = new System.Drawing.Point(216, 106);
+        this.cancelButton.Name = "cancelButton";
+        this.cancelButton.Size = new System.Drawing.Size(75, 23);
+        this.cancelButton.TabIndex = 4;
+        this.cancelButton.Text = "Cancel";
+        this.cancelButton.UseVisualStyleBackColor = true;
+        this.cancelButton.Click += new System.EventHandler(this.cancelButton_Click);
+        // 
+        // Form1
+        // 
+        this.AcceptButton = this.connectButton;
+        this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
+        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+        this.CancelButton = this.cancelButton;
+        this.ClientSize = new System.Drawing.Size(384, 141);
+        this.Controls.Add(this.cancelButton);
+        this.Controls.Add(this.connectButton);
+        this.Controls.Add(this.legacyCheckBox);
+        this.Controls.Add(this.targetTextBox);
+        this.Controls.Add(this.label1);
+        this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
+        this.MaximizeBox = false;
+        this.MinimizeBox = false;
+        this.Name = "Form1";
+        this.ShowIcon = false;
+        this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+        this.Text = "SSH Connection";
+        this.ResumeLayout(false);
+        this.PerformLayout();
+    }
+
+    #endregion
+
+    private System.Windows.Forms.Label label1;
+    private System.Windows.Forms.TextBox targetTextBox;
+    private System.Windows.Forms.CheckBox legacyCheckBox;
+    private System.Windows.Forms.Button connectButton;
+    private System.Windows.Forms.Button cancelButton;
+}

SshHandler/Form1.cs

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+using System;
+using System.Windows.Forms;
+
+public partial class Form1 : Form
+{
+    // This property will store the result for the main program
+    public string FinalSshCommand { get; private set; }
+
+    public Form1(string initialTarget)
+    {
+        InitializeComponent();
+        targetTextBox.Text = initialTarget;
+        // Select the text for easy editing
+        targetTextBox.SelectAll();
+        targetTextBox.Focus();
+    }
+
+    private void connectButton_Click(object sender, EventArgs e)
+    {
+        string target = targetTextBox.Text;
+        bool useLegacy = legacyCheckBox.Checked;
+
+        string legacyArgs = "-o KexAlgorithms=+diffie-hellman-group1-sha1,diffie-hellman-group14-sha1 " +
+                            "-o HostKeyAlgorithms=+ssh-rsa " +
+                            "-o MACs=+hmac-sha1,hmac-sha1-96";
+
+        // Build the arguments for ssh.exe
+        string arguments = $"-A -C {(useLegacy ? legacyArgs : "")} {target}";
+
+        FinalSshCommand = arguments;
+        this.DialogResult = DialogResult.OK; // Set dialog result to OK
+        this.Close(); // Close the form
+    }
+
+    private void cancelButton_Click(object sender, EventArgs e)
+    {
+        this.DialogResult = DialogResult.Cancel; // Set dialog result to Cancel
+        this.Close();
+    }
+}

SshHandler/Form1.resx

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+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <data name="$this.ClientSize" type="System.Drawing.Size, System.Drawing">
+    <value>384, 141</value>
+  </data>
+  <data name="$this.Text" xml:space="preserve">
+    <value>SSH Connection</value>
+  </data>
+</root>

SshHandler/Program.cs

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+using Microsoft.Win32;
+using System;
+using System.Diagnostics;
+using System.Security.Principal;
+using System.Windows.Forms;
+
+static class Program
+{
+    private const string ProtocolName = "ssh";
+
+    [STAThread]
+    static void Main(string[] args)
+    {
+        Application.EnableVisualStyles();
+        Application.SetCompatibleTextRenderingDefault(false);
+
+        // If no arguments, run setup mode.
+        if (args.Length == 0)
+        {
+            SetupHandler();
+        }
+        // Otherwise, run handler mode.
+        else
+        {
+            HandleConnection(args[0]);
+        }
+    }
+
+    static void HandleConnection(string url)
+    {
+        string target = url.Replace("ssh://", "").TrimEnd('/');
+        if (!target.Contains("@"))
+        {
+            target = $"{Environment.UserName}@{target}";
+        }
+
+        // Show the form as a dialog
+        using (var form = new Form1(target))
+        {
+            if (form.ShowDialog() == DialogResult.OK)
+            {
+                // If user clicked "Connect", run the command
+                ProcessStartInfo psi = new ProcessStartInfo
+                {
+                    FileName = "ssh.exe",
+                    Arguments = form.FinalSshCommand,
+                    UseShellExecute = true,
+                    CreateNoWindow = false
+                };
+                Process.Start(psi);
+            }
+        }
+    }
+
+    static void SetupHandler()
+    {
+        if (!IsAdmin())
+        {
+            MessageBox.Show("Please run this application as an administrator to register the URL handler.", "Admin Privileges Required", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            return;
+        }
+
+        // The path is simple and correct because it's a native app
+        string exePath = Application.ExecutablePath;
+        string commandStr = $"\"{exePath}\" \"%1\"";
+
+        var confirmResult = MessageBox.Show(
+            "This will register this application to handle all ssh:// links.\n\n" +
+            $"Command:\n{commandStr}\n\n" +
+            "Do you want to proceed?",
+            "Registry Setup",
+            MessageBoxButtons.YesNo,
+            MessageBoxIcon.Information);
+
+        if (confirmResult == DialogResult.Yes)
+        {
+            try
+            {
+                // Write the keys to HKEY_CLASSES_ROOT
+                using (RegistryKey key = Registry.ClassesRoot.CreateSubKey(ProtocolName))
+                {
+                    key.SetValue("", $"URL:{ProtocolName} Protocol");
+                    key.SetValue("URL Protocol", "");
+                }
+                using (RegistryKey key = Registry.ClassesRoot.CreateSubKey($"{ProtocolName}\\shell\\open\\command"))
+                {
+                    key.SetValue("", commandStr);
+                }
+                MessageBox.Show("Successfully registered ssh:// protocol handler!", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show($"Failed to write to registry:\n{ex.Message}", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+    }
+
+    private static bool IsAdmin()
+    {
+        using (WindowsIdentity identity = WindowsIdentity.GetCurrent())
+        {
+            WindowsPrincipal principal = new WindowsPrincipal(identity);
+            return principal.IsInRole(WindowsBuiltInRole.Administrator);
+        }
+    }
+}

SshHandler/SshHandler.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWindowsForms>true</UseWindowsForms>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <ApplicationIcon>ssh_icon.ico</ApplicationIcon>
+  </PropertyGroup>
+
+</Project>