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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)

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About the Author

Simon Tagg

United Kingdom United Kingdom
No Biography provided

Comments and Discussions

 
QuestionRegEx version PinmemberMember 1049628631-Dec-13 0:11 
GeneralMy vote of 1 PinmemberJoe Programm3r25-Jun-09 6:44 
QuestionWouldn't this have been easier? PinmemberJoe Programm3r25-Jun-09 6:43 
AnswerRe: Wouldn't this have been easier? PinmemberSimon Tagg25-Jun-09 23:07 
The point is that the connection string is often returned embededed in an exception message that is logged and/or returned to the user - therefore your way does not work.
 
Thanks anyway for the comment.
QuestionWouldn't DbConnectionStringBuilder be easier to use? PinmemberPeter Rosconi25-Jun-09 6:21 
AnswerRe: Wouldn't DbConnectionStringBuilder be easier to use? PinmemberSimon Tagg25-Jun-09 23:28 
GeneralMy vote of 1 PinmemberAndre Luiz V Sanches25-Jun-09 6:18 
GeneralRe: My vote of 1 PinmemberSimon Tagg25-Jun-09 23:09 

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