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Strategy to distribute secure database connection strings in an enterprise environment

, 29 Nov 2003
The article discusses a strategy to securely configure and administer a set of connection strings which can be maintained environment wise. It also talks about distributing this information securely in a huge environment to be used by authorized clients only.
ecs_11.zip
EnterpriseConnString.dll
TestECS.exe
enterpriseconnstring_src2003.zip
TestECS
App.ico
UseECS.csproj.user
EnterpriseConnString
EnterpriseConnString.csproj.user
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using EnterpriseConnString;

namespace UseECS
{
	// Administration console GUI for creating connection strings.
	// Generally run from the server
	public class ConnStrGUI : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.TextBox KeyWordTxt;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.Label label5;
		private System.Windows.Forms.TextBox serverTxt;
		private System.Windows.Forms.ListView connStrList;
		private System.Windows.Forms.ColumnHeader EnvCol;
		private System.Windows.Forms.ColumnHeader ConnStrCol;
		private System.Windows.Forms.GroupBox groupBox2;
		private System.Windows.Forms.Label label7;
		private System.Windows.Forms.Label label8;
		private System.Windows.Forms.TextBox EnvTxt;
		private System.Windows.Forms.TextBox ConnStrTxt;
		private System.Windows.Forms.Button CloseBtn;
		private System.Windows.Forms.Button connectBtn;
		private System.Windows.Forms.Button refreshBtn;
		private System.Windows.Forms.Button AddReplaceBtn;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.GroupBox groupBox3;

		private EntConnString m_connStr;
		private bool m_bConnected;

		public ConnStrGUI()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();
			m_bConnected = false;
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(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()
		{
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(ConnStrGUI));
			this.label1 = new System.Windows.Forms.Label();
			this.KeyWordTxt = new System.Windows.Forms.TextBox();
			this.connStrList = new System.Windows.Forms.ListView();
			this.EnvCol = new System.Windows.Forms.ColumnHeader();
			this.ConnStrCol = new System.Windows.Forms.ColumnHeader();
			this.label2 = new System.Windows.Forms.Label();
			this.serverTxt = new System.Windows.Forms.TextBox();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.connectBtn = new System.Windows.Forms.Button();
			this.label5 = new System.Windows.Forms.Label();
			this.refreshBtn = new System.Windows.Forms.Button();
			this.groupBox2 = new System.Windows.Forms.GroupBox();
			this.AddReplaceBtn = new System.Windows.Forms.Button();
			this.ConnStrTxt = new System.Windows.Forms.TextBox();
			this.EnvTxt = new System.Windows.Forms.TextBox();
			this.label8 = new System.Windows.Forms.Label();
			this.label7 = new System.Windows.Forms.Label();
			this.CloseBtn = new System.Windows.Forms.Button();
			this.button1 = new System.Windows.Forms.Button();
			this.groupBox3 = new System.Windows.Forms.GroupBox();
			this.groupBox1.SuspendLayout();
			this.groupBox2.SuspendLayout();
			this.groupBox3.SuspendLayout();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(22, 90);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(54, 14);
			this.label1.TabIndex = 0;
			this.label1.Text = "Keyword :";
			// 
			// KeyWordTxt
			// 
			this.KeyWordTxt.Enabled = false;
			this.KeyWordTxt.Location = new System.Drawing.Point(84, 88);
			this.KeyWordTxt.Name = "KeyWordTxt";
			this.KeyWordTxt.Size = new System.Drawing.Size(144, 20);
			this.KeyWordTxt.TabIndex = 4;
			this.KeyWordTxt.Text = "";
			// 
			// connStrList
			// 
			this.connStrList.BackColor = System.Drawing.Color.LightGoldenrodYellow;
			this.connStrList.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
																						  this.EnvCol,
																						  this.ConnStrCol});
			this.connStrList.FullRowSelect = true;
			this.connStrList.GridLines = true;
			this.connStrList.Location = new System.Drawing.Point(6, 18);
			this.connStrList.Name = "connStrList";
			this.connStrList.Size = new System.Drawing.Size(372, 94);
			this.connStrList.TabIndex = 7;
			this.connStrList.View = System.Windows.Forms.View.Details;
			this.connStrList.DoubleClick += new System.EventHandler(this.OnListDblClick);
			// 
			// EnvCol
			// 
			this.EnvCol.Text = "Environment";
			this.EnvCol.Width = 119;
			// 
			// ConnStrCol
			// 
			this.ConnStrCol.Text = "Connection String";
			this.ConnStrCol.Width = 226;
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(36, 27);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(44, 14);
			this.label2.TabIndex = 3;
			this.label2.Text = "Server :";
			// 
			// serverTxt
			// 
			this.serverTxt.Location = new System.Drawing.Point(84, 24);
			this.serverTxt.Name = "serverTxt";
			this.serverTxt.Size = new System.Drawing.Size(234, 20);
			this.serverTxt.TabIndex = 1;
			this.serverTxt.Text = "";
			// 
			// groupBox1
			// 
			this.groupBox1.BackColor = System.Drawing.SystemColors.Control;
			this.groupBox1.Controls.Add(this.connectBtn);
			this.groupBox1.Controls.Add(this.label5);
			this.groupBox1.Controls.Add(this.label2);
			this.groupBox1.Controls.Add(this.serverTxt);
			this.groupBox1.Controls.Add(this.KeyWordTxt);
			this.groupBox1.Controls.Add(this.label1);
			this.groupBox1.Location = new System.Drawing.Point(6, 4);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(386, 122);
			this.groupBox1.TabIndex = 9;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "Authentication to server";
			// 
			// connectBtn
			// 
			this.connectBtn.Location = new System.Drawing.Point(244, 86);
			this.connectBtn.Name = "connectBtn";
			this.connectBtn.Size = new System.Drawing.Size(110, 23);
			this.connectBtn.TabIndex = 5;
			this.connectBtn.Text = "Connect";
			this.connectBtn.Click += new System.EventHandler(this.OnConnect);
			// 
			// label5
			// 
			this.label5.Location = new System.Drawing.Point(86, 50);
			this.label5.Name = "label5";
			this.label5.Size = new System.Drawing.Size(274, 30);
			this.label5.TabIndex = 9;
			this.label5.Text = "User should have write permissions on [server]\\HKLM Registry key. Leave blank for" +
				" local machine.";
			// 
			// refreshBtn
			// 
			this.refreshBtn.BackColor = System.Drawing.SystemColors.Control;
			this.refreshBtn.Location = new System.Drawing.Point(64, 118);
			this.refreshBtn.Name = "refreshBtn";
			this.refreshBtn.Size = new System.Drawing.Size(110, 23);
			this.refreshBtn.TabIndex = 6;
			this.refreshBtn.Text = "Refresh";
			this.refreshBtn.Click += new System.EventHandler(this.OnRefresh);
			// 
			// groupBox2
			// 
			this.groupBox2.BackColor = System.Drawing.SystemColors.Control;
			this.groupBox2.Controls.Add(this.AddReplaceBtn);
			this.groupBox2.Controls.Add(this.ConnStrTxt);
			this.groupBox2.Controls.Add(this.EnvTxt);
			this.groupBox2.Controls.Add(this.label8);
			this.groupBox2.Controls.Add(this.label7);
			this.groupBox2.Location = new System.Drawing.Point(8, 284);
			this.groupBox2.Name = "groupBox2";
			this.groupBox2.Size = new System.Drawing.Size(378, 106);
			this.groupBox2.TabIndex = 12;
			this.groupBox2.TabStop = false;
			this.groupBox2.Text = "Add/Replace connection string";
			// 
			// AddReplaceBtn
			// 
			this.AddReplaceBtn.Location = new System.Drawing.Point(138, 78);
			this.AddReplaceBtn.Name = "AddReplaceBtn";
			this.AddReplaceBtn.Size = new System.Drawing.Size(102, 23);
			this.AddReplaceBtn.TabIndex = 10;
			this.AddReplaceBtn.Text = "Add / Replace";
			this.AddReplaceBtn.Click += new System.EventHandler(this.OnAddReplace);
			// 
			// ConnStrTxt
			// 
			this.ConnStrTxt.Location = new System.Drawing.Point(110, 46);
			this.ConnStrTxt.Name = "ConnStrTxt";
			this.ConnStrTxt.Size = new System.Drawing.Size(258, 20);
			this.ConnStrTxt.TabIndex = 9;
			this.ConnStrTxt.Text = "";
			// 
			// EnvTxt
			// 
			this.EnvTxt.Location = new System.Drawing.Point(110, 21);
			this.EnvTxt.Name = "EnvTxt";
			this.EnvTxt.Size = new System.Drawing.Size(164, 20);
			this.EnvTxt.TabIndex = 8;
			this.EnvTxt.Text = "";
			// 
			// label8
			// 
			this.label8.Location = new System.Drawing.Point(12, 48);
			this.label8.Name = "label8";
			this.label8.Size = new System.Drawing.Size(98, 16);
			this.label8.TabIndex = 1;
			this.label8.Text = "Connection string :";
			this.label8.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// label7
			// 
			this.label7.Location = new System.Drawing.Point(36, 24);
			this.label7.Name = "label7";
			this.label7.Size = new System.Drawing.Size(74, 14);
			this.label7.TabIndex = 0;
			this.label7.Text = "Environment :";
			this.label7.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// CloseBtn
			// 
			this.CloseBtn.BackColor = System.Drawing.SystemColors.Control;
			this.CloseBtn.Location = new System.Drawing.Point(136, 400);
			this.CloseBtn.Name = "CloseBtn";
			this.CloseBtn.Size = new System.Drawing.Size(128, 23);
			this.CloseBtn.TabIndex = 11;
			this.CloseBtn.Text = "Close";
			this.CloseBtn.Click += new System.EventHandler(this.CloseBtn_Click);
			// 
			// button1
			// 
			this.button1.BackColor = System.Drawing.SystemColors.Control;
			this.button1.Location = new System.Drawing.Point(206, 118);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(110, 23);
			this.button1.TabIndex = 13;
			this.button1.Text = "Delete";
			this.button1.Click += new System.EventHandler(this.OnDelete);
			// 
			// groupBox3
			// 
			this.groupBox3.BackColor = System.Drawing.SystemColors.Control;
			this.groupBox3.Controls.Add(this.connStrList);
			this.groupBox3.Controls.Add(this.refreshBtn);
			this.groupBox3.Controls.Add(this.button1);
			this.groupBox3.Location = new System.Drawing.Point(6, 132);
			this.groupBox3.Name = "groupBox3";
			this.groupBox3.Size = new System.Drawing.Size(384, 146);
			this.groupBox3.TabIndex = 14;
			this.groupBox3.TabStop = false;
			this.groupBox3.Text = "Existing connection strings on server";
			// 
			// ConnStrGUI
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.BackColor = System.Drawing.Color.Lavender;
			this.ClientSize = new System.Drawing.Size(400, 427);
			this.Controls.Add(this.groupBox3);
			this.Controls.Add(this.CloseBtn);
			this.Controls.Add(this.groupBox2);
			this.Controls.Add(this.groupBox1);
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.MaximizeBox = false;
			this.MinimizeBox = false;
			this.Name = "ConnStrGUI";
			this.Text = "        Enterprise Connection Strings Admin Console";
			this.Load += new System.EventHandler(this.OnLoad);
			this.groupBox1.ResumeLayout(false);
			this.groupBox2.ResumeLayout(false);
			this.groupBox3.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		private void CloseBtn_Click(object sender, System.EventArgs e)
		{
			Close();
		}

		// Function takes care of changing the button text to connect
		// and disconnect (toggle)
		private void OnConnect(object sender, System.EventArgs e)
		{
			if (m_bConnected)
			{
				m_connStr = null;
				connStrList.Items.Clear();
			}
			else
			{
				m_connStr = new EntConnString(serverTxt.Text, true);
				try
				{
					m_connStr.Connect();
					OnRefresh(sender, e);
				} 
				catch (Exception ex)
				{
					m_connStr = null;
					MessageBox.Show(ex.Message, "Error");
					return;
				}
			}
			connectBtn.Text = (m_bConnected) ? "Connect" : "Disconnect";
			m_bConnected = ! m_bConnected;
		}

		private void OnRefresh(object sender, System.EventArgs e)
		{
			if (m_connStr == null)
			{
				MessageBox.Show("Should Connect before refreshing", "Error");
				return;
			}
			connStrList.Items.Clear();
			try
			{
				Hashtable values = m_connStr.GetAllConnectionStrings();
				IDictionaryEnumerator enumerator = values.GetEnumerator();
				while (enumerator.MoveNext())
				{
					ListViewItem lvi = connStrList.Items.Add((string)enumerator.Key);
					lvi.SubItems.Add((string)enumerator.Value);
				}
				values.Clear();
			} 
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message, "Error");
			}
		}

		private void OnAddReplace(object sender, System.EventArgs e)
		{
			if (m_connStr == null)
			{
				MessageBox.Show("Should Connect before Adding or Replacing strings", "Error");
				return;
			}
			try
			{
				m_connStr.SetConnectionString(EnvTxt.Text, ConnStrTxt.Text);
				EnvTxt.Text = ConnStrTxt.Text = null;
				OnRefresh(sender, e);
			} 
			catch (Exception ex) 
			{
				MessageBox.Show(ex.Message, "Error");
			}
		}

		private void OnListDblClick(object sender, System.EventArgs e)
		{
			if (connStrList.SelectedItems.Count > 0)
			{
				EnvTxt.Text = connStrList.SelectedItems[0].SubItems[0].Text;
				ConnStrTxt.Text = connStrList.SelectedItems[0].SubItems[1].Text;
			}
		}

		private void OnDelete(object sender, System.EventArgs e)
		{
			try
			{
				if (connStrList.SelectedItems.Count > 0)
					m_connStr.DeleteConnectionString(
						connStrList.SelectedItems[0].SubItems[0].Text);
				OnRefresh(sender, e);
			} 
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message, "Error");
			}
		
		}

		// check for the keyword and if it is not found or not
		// 8 characters in length exit the application
		private void OnLoad(object sender, System.EventArgs e)
		{
			try 
			{
				this.KeyWordTxt.Text = Keyword.GetKeyWord();
			}
			catch(Exception ex) // error - the keyword is not set on this machine
			{
				MessageBox.Show(ex.Message, "Error");
				Close();
			}
		}

	}
}

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About the Author

Sriram Chitturi
Architect
United States United States
No Biography provided

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