Cute article about sanitizing form input…
…found this next snippet in the authentication code for the project he’d been assigned to.
// The following string is an SQL comment, and could // blank out the check for password in our SQL statement // if used in the username! if (username.indexOf("';--")!=-1) { throw new AuthorisationException(username +" given as login name contains ';--, this is bad for SQL!"); } // Get the (hopefully single) id of the player with // this name and password ResultSet authorised = statement.executeQuery( "SELECT id FROM table_name_redacted WHERE " + "username='"+username +"' AND password='"+password+"';");It’s a bit better, but doesn’t quite fool the hacker who uses the “‘; –” attack instead of “‘;–”.

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