You can't.
You have to have the non-crypted password which you then run the crypt()
function on. Say the password is banana. You then run:
crypt('banana','ba') => baGGlRhhSFzk2
crypt('banana','ys') => ysu0jnfX9fp2.
You make sure these two match the two crypted strings stored in the DB.
There is no way to compare baGGlRhhSFzk2 directly to ysu0jnfX9fp2.
-Rasmus
On Wed, 15 May 2002, Matthew Ward wrote:
> I'm currently integrating my site with YaBB so that when you log into my
> YaBB forums it also logs you into the whole site. I'm also developing a
> script that I'm integrating into my main page that checks the password in
> the cookie with the one in the database as a security check.
>
> The problem is, the crypted password stored in the database is seeded with
> the password itself, however the crypted password that the YaBB login script
> stores in the cookie is seeded with "ys", producing two completely different
> passwords. So how am I (and how does YaBB) compare these two passwords to
> make sure their the same, if their completely different?
>
>
>
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