Title: Reverse Engineering   Salting
Last modified: August 20, 2016

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# Reverse Engineering Salting

 *  [jibbius](https://wordpress.org/support/users/jibbius/)
 * (@jibbius)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/reverse-engineering-salting/)
 * Hi,
    Thanks for the great plugin.
 * I’m looking to write some browser-automation test scripts to test my site.
    One
   issue I have, is that I need to test:
    - The CAPTCHA is working
    - The process behind the CAPTCHA is working
 * I’ve noticed that the CAPTCHA code is determined by:
 *     ```
       securimage_show.php?si_form_id=reg&prefix=RandomNumbersAndLetters
       ```
   
 * Obviously, I get a different CAPTCHA code, based on the prefix (presumably the
   algorithm is salted also?).
 * Two questions:
    – Is it possible for me to figure out what the CAPTCHA is, based
   on RandomNumbersAndLetters and a known Salt? – How do I change the Salt? Does
   this plugin use one of the values in wp-config?
 * (You could probably list these on the FAQ)
 * Thanks in advance.
 * [http://wordpress.org/extend/plugins/si-captcha-for-wordpress/](http://wordpress.org/extend/plugins/si-captcha-for-wordpress/)

Viewing 1 replies (of 1 total)

 *  Thread Starter [jibbius](https://wordpress.org/support/users/jibbius/)
 * (@jibbius)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/reverse-engineering-salting/#post-3483259)
 * I realise I’m making assumptions with the above.
 * My real question(s) –
    - Is it possible to reverse engineer this, somehow, for the purpose of testing
      my own site?
    - Alternatively, perhaps I can force the CAPTCHA to have a known value (by adding
      a new action somewhere)?
 * Any ideas/background on how the code works would be awesome.
    Thanks 🙂

Viewing 1 replies (of 1 total)

The topic ‘Reverse Engineering Salting’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/si-captcha-for-wordpress_dde4c1.svg)
 * [SI CAPTCHA Anti-Spam](https://wordpress.org/plugins/si-captcha-for-wordpress/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/si-captcha-for-wordpress/#faq)
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 * 1 reply
 * 1 participant
 * Last reply from: [jibbius](https://wordpress.org/support/users/jibbius/)
 * Last activity: [13 years, 3 months ago](https://wordpress.org/support/topic/reverse-engineering-salting/#post-3483259)
 * Status: not resolved