Re: Ecommerce site - how?

From	"J.O. Aho" <user@example.net>
Newsgroups	comp.lang.php
Subject	Re: Ecommerce site - how?
Date	2017-06-26 21:42 +0200
Message-ID	<erd6dvFhfi0U1@mid.individual.net> (permalink)
References	(1 earlier) <oiodsn$pud$1@gioia.aioe.org> <PcqdnRTWK6vXeM3EnZ2dnUU7-X3NnZ2d@posted.internetamerica> <oir89b$187l$1@gioia.aioe.org> <oirani$2jp$1@solani.org> <oirgtl$1po2$1@gioia.aioe.org>

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On 06/26/17 19:40, R.Wieser wrote:
> Christoph,
> 
>> And yes, using a PHP session instead is usually the appropriate
>> solution.  *Extremly* simplified:
> 
> *Over* simplified I'm afraid.   What you put down there (remembering the IDs
> of the selected products) can be done by using cookies.

Which would be possible to tamper and give another attack vector on the
site. And can cause some browser to get issues if the data amount is too
big as when you are ordering many different things at the same time.

> ... which would, in this simplified case, even be preferrable, as than the
> user can stop, and restart shopping (even days later) whenever they want
> (which is not possible using a basic PHP session).

Session cookie can have a long lifespan too, so the user could come back
and continue with what is stored in the session.

> The idea is to, when the PHP session is created, store the clients IP and
> check it with the stored one on subsequent usages*. 

And this can just lead to issues which we already pointed out. This is a
technique used in the early days of internet but didn't work out too
well and didn't give any extra security.

> While it certainly is
> possible to (even without attempting to do so) hijack an IP, sending the
> correct session-ID with it is a whole other ballgame.  Especially when done
> over SSL.

There are other methods which are more used nowadays, when the request
will come from the users browser, but a request orchestrated by a third
party, far less work than spoofing IP which ain't too difficult.

If you are interested in learning take a look at OWASP.

-- 

 //Aho

Thread

Ecommerce site - how? bit-naughty@hotmail.com - 2017-06-25 05:42 -0700
  Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-25 15:30 +0200
    Re: Ecommerce site - how? "J.O. Aho" <user@example.net> - 2017-06-25 16:03 +0200
    Re: Ecommerce site - how? gordonb.y152t@burditt.org (Gordon Burditt) - 2017-06-26 05:43 -0500
      Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-26 17:12 +0200
        Re: Ecommerce site - how? "Christoph M. Becker" <cmbecker69@arcor.de> - 2017-06-26 17:54 +0200
          Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-26 19:40 +0200
            Re: Ecommerce site - how? "J.O. Aho" <user@example.net> - 2017-06-26 21:42 +0200
              Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-26 23:14 +0200
                Re: Ecommerce site - how? "Christoph M. Becker" <cmbecker69@arcor.de> - 2017-06-27 00:28 +0200
                Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-27 10:48 +0200
                Re: Ecommerce site - how? "J.O. Aho" <user@example.net> - 2017-06-27 07:56 +0200
                Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-27 12:27 +0200
                Re: Ecommerce site - how? "J.O. Aho" <user@example.net> - 2017-06-27 19:15 +0200
                Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-27 22:01 +0200
                Re: Ecommerce site - how? "J.O. Aho" <user@example.net> - 2017-06-28 07:07 +0200
                Re: Ecommerce site - how? Gordon Burditt <gordon@hammy.burditt.org> - 2017-06-30 17:08 -0500
        Re: Ecommerce site - how? "J.O. Aho" <user@example.net> - 2017-06-26 18:29 +0200
          Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-26 19:17 +0200
            Re: Ecommerce site - how? Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-26 13:34 -0400
              Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-26 20:11 +0200
                Re: Ecommerce site - how? "J.O. Aho" <user@example.net> - 2017-06-26 21:31 +0200
                Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-26 22:29 +0200
                Re: Ecommerce site - how? "J.O. Aho" <user@example.net> - 2017-06-27 07:19 +0200
                Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-27 11:24 +0200
                Re: Ecommerce site - how? "J.O. Aho" <user@example.net> - 2017-06-27 19:43 +0200
                Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-27 23:09 +0200
                Re: Ecommerce site - how? "J.O. Aho" <user@example.net> - 2017-06-28 07:12 +0200
                Re: Ecommerce site - how? Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-27 21:10 -0400
                Re: Ecommerce site - how? Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-26 16:32 -0400
                Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-27 10:30 +0200
                Re: Ecommerce site - how? Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-27 08:38 -0400
                Re: Ecommerce site - how? "R.Wieser" <address@not.available> - 2017-06-27 17:47 +0200
                Re: Ecommerce site - how? Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-27 12:16 -0400
                Re: Ecommerce site - how? gordonb.bytf1@burditt.org (Gordon Burditt) - 2017-06-29 18:16 -0500
                Re: Ecommerce site - how? Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-29 20:41 -0400
                Re: Ecommerce site - how? gordonb.99a3p@burditt.org (Gordon Burditt) - 2017-06-29 23:39 -0500
                Re: Ecommerce site - how? Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-30 07:28 -0400
                Re: Ecommerce site - how? Stefan+Usenet@Froehlich.Priv.at (Stefan Froehlich) - 2017-06-30 13:48 +0000
                Re: Ecommerce site - how? gordonb.gcghn@burditt.org (Gordon Burditt) - 2017-06-30 16:15 -0500
                Re: Ecommerce site - how? Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-30 22:35 -0400
                Re: Ecommerce site - how? Richard Damon <Richard@Damon-Family.org> - 2017-06-29 23:46 -0400
        Re: Ecommerce site - how? gordonb.d2wed@burditt.org (Gordon Burditt) - 2017-06-29 17:32 -0500
  Re: Ecommerce site - how? bit-naughty@hotmail.com - 2017-06-27 10:58 -0700
    Re: Ecommerce site - how? Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-27 15:34 -0400
    Re: Ecommerce site - how? gordonb.4psc7@burditt.org (Gordon Burditt) - 2017-06-30 16:55 -0500
      Re: Ecommerce site - how? bit-naughty@hotmail.com - 2017-07-01 03:03 -0700
        Re: Ecommerce site - how? Jerry Stuckle <jstucklex@attglobal.net> - 2017-07-01 09:30 -0400
        Re: Ecommerce site - how? Jerry Stuckle <jstucklex@attglobal.net> - 2017-07-01 09:34 -0400

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