Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister
 
PerlMonks  

comment on

( [id://3333] : superdoc . print w/replies, xml ) Need Help??
The C program would not relinquish the password if the inode of the registered script has changed, meaning the script has changed - so a hacker can't add a "die" or just print the password.
Oh, woe is me! I can't modify the Perl script to print out the parameters it passes to DBI::connect!

Guess I'll edit DBI.pm instead and have the connect method print @_ before doing anything else.

As afoken said, if you have both the hidden secret and the means of revealing the secret in the same place at the same time, then an attacker will be able to learn the secret, whether by subverting your decoding process or by learning how it works and applying it himself. You can make this more difficult, but you can never make it impossible, as has been repeatedly demonstrated by the ongoing wars between digital content providers and digital content pirates. The content providers have thrown boatloads of money at it and hired people far smarter than you or me, and the pirates invariably crack each new scheme in far less time than it took to devise and implement the scheme in the first place (often within a single day).


In reply to Re^3: Hide DBI password in scripts by dsheroh
in thread Hide DBI password in scripts by danielgr

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.