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Title : what salt do I have to feed the crypt function with to make it work like the htpasswd command of apache?
Categories : Algorithms, PHP, Authentication Update Picture
Anton Stockl
Date : Oct 23rd 1998
Grade : 2 of 5 (graded 3 times)
Viewed : 10491
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you use one that you make up. maybe like this:


$salt = substr(0, 2, md5(Date());
$encrypted = crypt($string, $salt);


The salt merely ensures that if 2 people have the same password, their
"crypted" representations are not the same (unless they use the same
salt). When you want to compare a password, you first find the already
encrypted one, grab the salt (the first 2 chars), and then encrypt the
password and compare it.



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User Comments
 Teeranai Thamshutiporn wrote : 199
I try to use your salt but It said :
Warning: Wrong parameter count for date() 
in /home/internet/public_html/admin/passwd.php3 

What`s wrong ?

I wanna To Check and Change Password on Linux vai PHP3 
code [My Server use MD5]. Do you have same code ?

Regards,
Teeranai Thamshutiporn 		 
 Matt Szubrycht wrote :392
Hi,

You need to provide the format of the date ... 
I would use the number of seconds since the epoch, 
therefore, it should looks somewhat like this:

$salt = substr(0, 2, md5(Date("U"))); 
    $encrypted = crypt($string, $salt);

That should do the trick, at least it works on my Cobalt 
RAQ3 running Linux.

Regards,
Matt