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Remove the security credentials from a connection string

, 25 Jun 2009
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This might save you 15 minutes and avoid the embarrasment of returning your 'sa' password to your customers along with an error message.

Introduction

This is a noddy app with a method to remove the security credentials from a database connection string.

Background

It's the sort of thing that you have to write over and over wherever you go and is always more time consuming than you would think.

Using the code

Feel free to use this - add more security qualifiers if you like too - at present, the example only hits user, uid, pwd, and password.

The main method is as follows - so no need to download the code:

string m_DatabaseConnectionString = 
  "Data Source=MYHAPPYHAPPYDB\\SQLEXPRESS;Initial Catalog=JoyJoy;user=sa;password=W@nk3r";

private string RemoveConnectionStringSecurity(string inString)
{
    string[] securityQualifiers = new string[] { "user", "uid", 
                                      "password", "pwd" };
    string retStr = m_DatabaseConnectionString;

    foreach (string qualifier in securityQualifiers)
    {
        if (retStr.IndexOf(qualifier + "=") > 0)
        {
        // Remove Security Qualifier
            try
            {
                retStr = retStr.Substring(0, 
                         retStr.ToLower().IndexOf(qualifier + "=") + 
                         qualifier.Length + 1)
                        + "*HIDDEN*"
                        + retStr.Substring
                        (
                            retStr.ToLower().IndexOf(qualifier + "="),
                            retStr.Length - retStr.ToLower().IndexOf(qualifier + "=")
                        ).Substring
                        (
                            retStr.Substring
                            (
                                retStr.ToLower().IndexOf(qualifier + "="),
                                retStr.Length - retStr.ToLower().IndexOf(qualifier + "=")
                            ).IndexOf(";")
                        );
            }
            catch
            {
            // Last element and no terminating ';'
                retStr = retStr.Substring(0, 
                  retStr.ToLower().IndexOf(qualifier + "=") + qualifier.Length + 1)
                  + "*HIDDEN*";
            }
        }
    }

    return inString.Replace(m_DatabaseConnectionString, retStr);
}

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Simon Tagg

United Kingdom United Kingdom
No Biography provided

Comments and Discussions

 
GeneralMy vote of 1 PinmemberAndre Luiz V Sanches25-Jun-09 6:18 
I suggest you use regular expressions, would make the code much cleaner and easier to read.
 
---------
Andre Sanches
 
"UNIX is friendly, it's just picky about its friends"

GeneralRe: My vote of 1 PinmemberSimon Tagg25-Jun-09 23:09 

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