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Posted 29 Nov 2003

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.
// Copyright � 2003
// Author : Sriram Chitturi
// Date : November 29, 2003

using System;
using Microsoft.Win32;
using System.Configuration;

namespace EnterpriseConnString
	// Singleton class to get the keyword
	// from either Registry or config file

	// Customize this class to read KeyWord from any source
	public class Keyword
		private static string m_keyword = null;

		private Keyword()
		public static string GetKeyWord()
			// use any of the methods below to retrieve a keyword, depends on
			// enterprise level security

			if (m_keyword == null)
				// m_keyword = ReadFromRegistry();
				m_keyword = ReadFromConfigFile();
			if (m_keyword.Length != 8)
				m_keyword = null;
				throw new Exception("Keyword should be 8 characters since DES encryption is being used");

			return m_keyword;

		private static string ReadFromRegistry()
			// keyword should be already present in the registry
			// If you want to create keyword in registry
			// use a reg file with the following 3 lines

			// Windows Registry Editor Version 5.00
			// "keyword"="MyKeyWord"

			RegistryKey HKLM = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\ECS");
			string regvalue = (string)HKLM.GetValue("KeyWord");
			if (regvalue == null)
				throw new Exception("KeyWord not found in Registry!");
			return regvalue;

		private static string ReadFromConfigFile()
			// use a config file to set the keyword
			// administrators can use machine.config files to set enterprise wide
			// keywords. This can enable administrators to change keywords often.
			// Note : Whenever the keyword is changed, run admin console to
			//			update the server Registry

			// I am using a local app.config file to set the keyword as an example
			string [] values = ConfigurationSettings.AppSettings.GetValues("keyword");
			if (values == null)
				throw new Exception("Keyword not found in config file!");
			return (string)(values[0]);

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About the Author

Sriram Chitturi
United States United States
No Biography provided

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