I need to veryify a UNIX user from a webpage. I am trying to compare the encrypted password entry in the password file with the one submitted on the webpage. I can never get a match, however. I'm using the standard encryption function: 

sub encrypt {
   @saltset = ('a' .. 'z', 'A' .. 'Z', '0' .. '9', '.', '/');
   $pass = $_[0];

   $now = time;
   ($pert1, $pert2) = unpack("C2", "$username");
   $week = $now / (60*60*24*7) + $pert1 + $pert2;
   $nsalt = $saltset[$week % 64] . $saltset[$now % 64];
   $cryptpass = crypt($pass,$nsalt);

   return $cryptpass;
}

[download]

However, this function uses the time to set the salt. So my question is, since this function will return a different encrypted password every time, how do I authenticate a user?

In reply to UNIX user authentication by Anonymous Monk

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


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.