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Posted 25 Jun 2009
Licenced CPOL

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.


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


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
                retStr = retStr.Substring(0, 
                         retStr.ToLower().IndexOf(qualifier + "=") + 
                         qualifier.Length + 1)
                        + "*HIDDEN*"
                        + retStr.Substring
                            retStr.ToLower().IndexOf(qualifier + "="),
                            retStr.Length - retStr.ToLower().IndexOf(qualifier + "=")
                                retStr.ToLower().IndexOf(qualifier + "="),
                                retStr.Length - retStr.ToLower().IndexOf(qualifier + "=")
            // Last element and no terminating ';'
                retStr = retStr.Substring(0, 
                  retStr.ToLower().IndexOf(qualifier + "=") + qualifier.Length + 1)
                  + "*HIDDEN*";

    return inString.Replace(m_DatabaseConnectionString, retStr);


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

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Comments and Discussions

QuestionWouldn't DbConnectionStringBuilder be easier to use? Pin
Peter Rosconi25-Jun-09 6:21
memberPeter Rosconi25-Jun-09 6:21 
AnswerRe: Wouldn't DbConnectionStringBuilder be easier to use? Pin
Simon Tagg25-Jun-09 23:28
memberSimon Tagg25-Jun-09 23:28 

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